LTE eNB
Counter Description
for SLR 6.0.0
Radio Access Network
This description provides call flows and detailed description for statistic items
collected in the LTE eNB system for analysis.
Document Version 3.0
April 2017
Document Number: 2600-00J7NNGAT
© 2017 SAMSUNG Electronics Co., Ltd.
All Rights Reserved. The contents of this document/presentation contain proprietary information that
must be kept confidential. No part of this document shall be photocopied, reproduced, stored in a
retrieval system, or transmitted, in any form or by any means whether, electronic, mechanical, or
otherwise without the prior written permission of SAMSUNG Electronics Co., Ltd.
No warranty of accuracy is given concerning the contents of the information contained in this
publication. To the extent permitted by law no liability (including liability to any person by reason of
negligence) will be accepted by SAMSUNG Electronics Co., Ltd., its subsidiaries or employees for
any direct or indirect loss or damage caused by omissions from or inaccuracies in this document.
SAMSUNG Electronics Co., Ltd. reserves the right to change details in this publication without notice.
SNMTC-v3-0312
This manual should be read and used as a guideline for properly installing and/or operating the
product. Owing to product variations across the range, any illustrations and photographs used in
this manual may not be a wholly accurate depiction of the actual products you are using.
This manual may be changed for system improvement, standardization and other technical
reasons without prior notice.
Samsung Networks documentation is available at http://www.samsungdocs.com
Confidential
Contents
Preface
xiv
Relevance ....................................................................................................................................... xiv
Conventions in this Document ....................................................................................................... xiv
New and Changed Information .......................................................................................................xv
Revision History .............................................................................................................................. xxi
Organization of This Document ..................................................................................................... xxi
Related Documentation ................................................................................................................. xxi
Personal and Product Safety ......................................................................................................... xxii
Equipment Markings .................................................................................................................... xxvi
Chapter 1
Introduction
1
Chapter 2
Counter Description
3
Appendix A Acronyms
4
Appendix B Call Flow
5
MRO ................................................................................................................................................. 5
RLF Classification ......................................................................................................................... 5
RLF at RRC Connection ............................................................................................................... 13
RLF VOICE Classification ............................................................................................................ 20
Inter RAT MRO (UTRAN) ............................................................................................................ 26
Inter RAT MRO (GERAN) ............................................................................................................ 28
VoLTE .............................................................................................................................................. 29
VoLTE Handover......................................................................................................................... 29
VoLTE Handover time ................................................................................................................ 30
VoLTE Quality Defect ................................................................................................................. 32
GTP ................................................................................................................................................. 33
GTP Forward Traffic ................................................................................................................... 33
GTP Sequence Number per eNB ................................................................................................. 34
GTP Sequence Number per QCI .................................................................................................. 34
SRB ................................................................................................................................................. 35
Cell PDCP SDU Bit Rate .............................................................................................................. 35
DRB ................................................................................................................................................. 36
Packet Drop Rate ....................................................................................................................... 36
Packet Loss Rate ........................................................................................................................ 36
Packet Statistics.............................................................................................................................. 37
PDCP Packet ............................................................................................................................... 37
S1SIG .............................................................................................................................................. 38
UE-associated logical S1 Connection Establishment.................................................................. 38
Paging ............................................................................................................................................. 40
Paging ........................................................................................................................................ 40
Overload Protection ....................................................................................................................... 41
Denied Call by Overload Protection ........................................................................................... 41
RRC ................................................................................................................................................. 42
Call Drop .................................................................................................................................... 42
RRC Connection Number ............................................................................................................ 45
RRC Connection Establishment .................................................................................................. 46
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Contents
RRC Connection Reconfiguration ............................................................................................... 53
RRC Connection Re-establishment ............................................................................................. 54
RRC Connection Release ............................................................................................................ 61
RRC Connection Re-establishment Time .................................................................................... 74
RRC Connection Setup Time ....................................................................................................... 75
Load Balancing ............................................................................................................................... 76
Idle Load Balancing .................................................................................................................... 76
Load ........................................................................................................................................... 76
Load Histogram ......................................................................................................................... 77
Carrier Aggregation ........................................................................................................................ 78
Carrier Aggregation capable UEs (PCell) ................................................................................... 78
Carrier Aggregation Message count for Addition-Release ........................................................ 80
Aggregate Maximum Bit Rate ........................................................................................................ 87
UE AMBR Override ..................................................................................................................... 87
KPI .................................................................................................................................................. 89
Accessibility................................................................................................................................ 89
Availability ................................................................................................................................. 89
Integrity ..................................................................................................................................... 89
Mobility ...................................................................................................................................... 89
Retainability ............................................................................................................................... 90
Retainability per QCI .................................................................................................................. 90
E-RAB .............................................................................................................................................. 91
E-RAB Erase................................................................................................................................ 91
E-RAB Erase Request .................................................................................................................. 91
E-RAB Setup ............................................................................................................................... 97
E-RAB Setup Add ...................................................................................................................... 102
E-RAB Modify ........................................................................................................................... 106
Active E-RAB Number............................................................................................................... 111
E-RAB QCI per-PLMN rejected.................................................................................................. 112
E-RAB Release .......................................................................................................................... 112
E-RAB Release Request ............................................................................................................ 114
E-RAB Session Time per QCI ..................................................................................................... 115
E-RAB Session Time per Cell ..................................................................................................... 116
E-RAB Setup Time .................................................................................................................... 116
UE Category .................................................................................................................................. 118
UE Category ............................................................................................................................. 118
Scheduler ..................................................................................................................................... 119
Measurement Report ............................................................................................................... 119
HO EUTRAN .................................................................................................................................. 120
S1 Handover............................................................................................................................. 120
X2 Handover ............................................................................................................................ 122
Intra-eNB Handover ................................................................................................................. 123
S1 In Handover......................................................................................................................... 155
S1 Out Handover ...................................................................................................................... 170
Handover Time......................................................................................................................... 187
Measurement Results of Source Cell ........................................................................................ 189
Measurement Results of Target Cell ........................................................................................ 189
X2 In Handover ........................................................................................................................ 190
X2 Out Handover ..................................................................................................................... 210
Preemption Handover .............................................................................................................. 220
Preemption Handover per E-RAB ............................................................................................. 222
HO UTRAN .................................................................................................................................... 224
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
iv
Confidential
List of Figures
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Figure 47.
Collection Time for CoverageHole ................................................................................................... 5
Collection Time for CoverageHoleN ................................................................................................. 6
Collection Time for TooEarlyHoFailure ............................................................................................ 7
Collection Time for TooEarlyHoRlfAfterHo ...................................................................................... 8
Collection Time for TooLateHoRlfBeforeTriggering ......................................................................... 8
Collection Time for TooLateHoRlfAfterTriggering ............................................................................ 9
Collection Time for WrongCellRlfAfterTriggering .......................................................................... 10
Collection Time for WrongCellRlfAfterHo ...................................................................................... 11
Collection Time for PingpongHandover ......................................................................................... 12
Collection Time for CoverageHoleAtSetup..................................................................................... 13
Collection Time for CoverageHoleAtSetupN .................................................................................. 14
Collection Time for TooEarlyHoFailureAtSetup ............................................................................. 15
Collection Time for Too EarlyHORlfAfterHoAtSetup ...................................................................... 16
Collection Time for TooLateHoRlfBeforeTriggerAtSetup ............................................................... 17
Collection Time for HOToWrongCellRlfAfterTriggeringAtSetup .................................................... 18
Collection Time for HOToWrongCellRlfAfterHOAtSetup ............................................................... 19
Collection Time for TooEarlyHoFailureVoice ................................................................................. 20
Collection Time for TooEarlyHoRlfAfterHoVoice ........................................................................... 21
Collection Time for TooLateHoRlfBeforeTriggeringVoice .............................................................. 21
Collection Time for TooLateHoRlfAfterTriggeringVoice ................................................................. 22
Collection Time for WrongCellRlfAfterTriggeringVoice .................................................................. 23
Collection Time for WrongCellRlfAfterHoVoice ............................................................................. 24
Collection Time for PingpongHandoverVoice ................................................................................ 25
Collection Time for UtranTooEarlyHo ............................................................................................ 26
Collection Time for UtranPingpongHO ........................................................................................... 27
Collection Time for UtranTooEarlyHoAfterConnFail/UtranTooLateHoAfterConnFail.................... 27
Collection Time for GeranTooEarlyHo............................................................................................ 28
Collection time for VoLTE Intra handover ...................................................................................... 29
Collection time for VoLTE X2 handover ......................................................................................... 29
Collection time for VoLTE S1 handover .......................................................................................... 30
Collection time for VoLTE intra handover time .............................................................................. 30
Collection time for VoLTE X2 handover time ................................................................................. 31
Collection time for VoLTE S1 handover time ................................................................................. 31
Collection time for Downlink VoLTE quality defect ........................................................................ 32
Collection time for Uplink VoLTE quality defect ............................................................................ 32
Collection Time for GTP Forward Traffic ........................................................................................ 33
Collection Time for GTP Forward Traffic ........................................................................................ 33
Collection Time for GTP Forward Traffic ........................................................................................ 34
Collection Time for GTP Sequence Number per eNB ..................................................................... 34
Collection Time for GTP Sequence Number per QCI ...................................................................... 34
Collection Time for PdcpSduBitrateDLTot ...................................................................................... 35
Collection Time for PdcpSduBitrateULTot ...................................................................................... 35
Collection Time for PdcpSduDropRateDL ....................................................................................... 36
Collection Time for PdcpSduLossRateUL, PdcpSduLossUlNum ...................................................... 36
Collection Time for PacketULByte .................................................................................................. 37
Collection Time for EnbQciDLByte ................................................................................................. 37
Collection Time for S1SIG (1).......................................................................................................... 38
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
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Confidential
List of Figures
Figure 48.
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Figure 99.
Collection Time for S1SIG (2).......................................................................................................... 38
Collection Time for S1SIG (3).......................................................................................................... 38
Collection Time for S1ConnEstabFail_S1apSigTo ........................................................................... 39
Collection Time for PAGING ........................................................................................................... 40
Denied Call Count for Overload Protection .................................................................................... 41
Collection Time for CallDrop_EccbDspAuditRlcMacCallRelease .................................................... 42
Collection Time for CallDrop_EccbRcvResetRequestFromEcmb .................................................... 42
Collection Time for CallDrop_EccbRcvCellReleaseIndFromEcmb .................................................. 42
Collection Time for CallDrop_EccbRadioLinkFailure ...................................................................... 43
Collection Time for CallDrop_EccbDspAuditMacCallRelease ......................................................... 43
Collection Time for CallDrop_EccbArqMaxReTransmission ........................................................... 43
Collection Time for CallDrop_EccbDspAuditRlcCallRelease ........................................................... 44
Collection Time for CallDrop_EccbTmoutRrcConnectionReconfig................................................. 44
Collection Time for CallDrop_EccbTmoutRrcConnectionReestablish ............................................ 44
Collection Time for CallDrop_EccbS1SctpOutOfService (1) ........................................................... 45
Collection Time for CallDrop_EccbS1SctpOutOfService (2) ........................................................... 45
Collection Time for RRC Connection Number ................................................................................ 45
Collection Time for Release Call Holding Time ............................................................................... 46
Collection Time for RRC Connection Establishment ...................................................................... 46
Collection Time for ConnEstabFail_CpCcTo ................................................................................... 47
Collection Time for ConnEstabFail_CpCcFail (1) ............................................................................ 47
Collection Time for ConnEstabFail_CpCcFail (2) ............................................................................ 47
Collection Time for ConnEstabFail_CpCcFail (3) ............................................................................ 48
Collection Time for ConnEstabFail_CpCcFail (4) ............................................................................ 48
Collection Time for ConnEstabFail_UpMacFail (1) ......................................................................... 48
Collection Time for ConnEstabFail_UpMacFail (2) ......................................................................... 49
Collection Time for ConnEstabFail_UpPdcpFail ............................................................................. 49
Collection Time for ConnEstabFail_UpRlcFail (1) ........................................................................... 49
Collection Time for ConnEstabFail_UpRlcFail (2) ........................................................................... 50
Collection Time for ConnEstabFail_RrcSigTo ................................................................................. 50
Collection Time for ConnEstabFail_S1apLinkFail (1) ...................................................................... 50
Collection Time for ConnEstabFail_S1apLinkFail (2) ...................................................................... 51
Collection Time for ConnEstabFail_S1apSigFail ............................................................................. 51
Collection Time for ConnEstabReject_CpCcFail (1) ........................................................................ 51
Collection Time for ConnEstabReject_CpCcFail (2) ........................................................................ 52
Collection Time for ConnEstabReject_CpCcFail (3) ........................................................................ 52
Collection Time for ConnEstabReject_CpCapaCacFail ................................................................... 52
Collection Time for ConnEstabReject_S1apMmeOvld ................................................................... 53
Collection Time for ConnReconfigAtt ............................................................................................. 53
Collection Time for ConnReconfigSucc .......................................................................................... 53
Collection Time for SCellAddCount ................................................................................................ 53
Collection Time for SCellReleaseCount .......................................................................................... 53
Collection Time for RRC Connection Re-Establishment ................................................................. 54
Collection Time for ConnReEstabFail_CpCcFail (1) ........................................................................ 54
Collection Time for ConnReEstabFail_CpCcFail (2) ........................................................................ 54
Collection Time for ConnReEstabFail_CpCcFail (3) ........................................................................ 55
Collection Time for ConnReEstabFail_CpCcFail (4) ........................................................................ 55
Collection Time for ConnReEstabFail_UpMacFail (1) ..................................................................... 55
Collection Time for ConnReEstabFail_UpMacFail (2) ..................................................................... 56
Collection Time for ConnReEstabFail_UpPdcpFail ......................................................................... 56
Collection Time for ConnReEstabFail_UpRlcFail (1) ....................................................................... 56
Collection Time for ConnReEstabFail_UpRlcFail (2) ....................................................................... 57
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
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Confidential
List of Figures
Figure 100.
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Figure 151.
Collection Time for ConnReEstabFail_RrcSigTo (1) ........................................................................ 57
Collection Time for ConnReEstabFail_RrcSigTo (2) ........................................................................ 57
Collection Time for ConnReEstabFail_S1apLinkFail (1) .................................................................. 58
Collection Time for ConnReEstabFail_S1apLinkFail (2) .................................................................. 58
Collection Time for ConnReEstabFail_S1apSigFail (1) .................................................................... 58
Collection Time for ConnReEstabFail_S1apSigFail (2) .................................................................... 59
Collection Time for ConnReEstabReject_CpCcFail (1) .................................................................... 59
Collection Time for ConnReEstabReject_CpCcFail (2) .................................................................... 59
Collection Time for ConnReEstabReject_CpCcFail (3) .................................................................... 59
Collection Time for ConnReEstabReject_CpCcFail (4) .................................................................... 60
Collection Time for ConnReEstabReject_CpCcFail (5) .................................................................... 60
Collection Time for ConnReEstabReject_CpCcFail (6) .................................................................... 60
Collection Time for ConnReEstabReject_CpCapaCacFail ............................................................... 61
Collection Time for ConnReEstabReject_CpQosCacFail ................................................................. 61
Collection Time for ConnRelease_CpCcNormal ............................................................................. 61
Collection Time for ConnRelease_CpCcTo ..................................................................................... 62
Collection Time for ConnRelease_CpCcFail (1) .............................................................................. 62
Collection Time for ConnRelease_CpCcFail (2) .............................................................................. 62
Collection Time for ConnRelease_CpCcFail (3) .............................................................................. 62
Collection Time for ConnRelease_CpCcFail (4) .............................................................................. 63
Collection Time for ConnRelease_UpGtpFail ................................................................................. 63
Collection Time for ConnRelease_UpMacFail (1) ........................................................................... 63
Collection Time for ConnRelease_UpMacFail (2) ........................................................................... 63
Collection Time for ConnRelease_UpMacUEInact ......................................................................... 64
Collection Time for ConnRelease_UpPdcpFail ............................................................................... 64
Collection Time for ConnRelease_UpRlcFail (1) ............................................................................. 64
Collection Time for ConnRelease_UpRlcFail (2) ............................................................................. 64
Collection Time for ConnRelease_RrcHcTo .................................................................................... 65
Collection Time for ConnRelease_RrcSigFail (1)............................................................................. 65
Collection Time for ConnRelease_RrcSigFail (2)............................................................................. 65
Collection Time for ConnRelease_RrcSigFail (3)............................................................................. 66
Collection Time for ConnRelease_RrcSigTo ................................................................................... 66
Collection Time for ConnRelease_CpBhCacFail.............................................................................. 67
Collection Time for ConnRelease_CpCapaCacFail .......................................................................... 67
Collection Time for ConnRelease_CpQosCacFail ........................................................................... 67
Collection Time for ConnRelease_S1apCuFail ................................................................................ 67
Collection Time for ConnRelease_S1apLinkFail (1) ........................................................................ 68
Collection Time for ConnRelease_S1apLinkFail (2) ........................................................................ 68
Collection Time for ConnRelease_S1apRoTo (1) ............................................................................ 69
Collection Time for ConnRelease_S1apRoTo (2) ............................................................................ 69
Collection Time for ConnRelease_S1apRoTo (3) ............................................................................ 70
Collection Time for ConnRelease_S1apSigFail (1) .......................................................................... 70
Collection Time for ConnRelease_S1apSigFail (2) .......................................................................... 71
Collection Time for ConnRelease_S1apSigFail (3) .......................................................................... 71
Collection Time for ConnRelease_S1apSigTo ................................................................................. 72
Collection Time for ConnRelease_X2apCuFail ............................................................................... 72
Collection Time for ConnRelease_X2apRoTo ................................................................................. 73
Collection Time for ConnRelease_X2apSigFail (1) .......................................................................... 73
Collection Time for ConnRelease_X2apSigFail (2) .......................................................................... 74
Collection Time for Re-establishment Time ................................................................................... 74
Collection Time for RRC Connection Setup Time ........................................................................... 75
Statistics for Idle LB ........................................................................................................................ 76
LTE eNB Counter Description for SLR 6.0.0 v3.0
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List of Figures
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Collection Time for Load ................................................................................................................ 76
Collection Time for Load Histogram ............................................................................................... 77
Collection Time for CaCapaPCellUE (1) in Initial Attach case ......................................................... 78
Collection Time for CaCapaPCellUE (1) in X2 Handover case ......................................................... 78
Collection Time for CaCapaPCellUE (1) in S1 Handover case ......................................................... 79
Collection Time for Initial Attach ................................................................................................... 80
Collection Time for Intra eNB Handover ........................................................................................ 81
Collection Time for X2 eNB Handover ............................................................................................ 82
Collection Time for S1 eNB Handover ............................................................................................ 83
Collection Time for A4 Event .......................................................................................................... 84
Collection Time for A6 Event .......................................................................................................... 84
Collection Time for A2 Event .......................................................................................................... 85
Collection Time for Rrc Connection Reestablishment.................................................................... 85
Collection Time for Rrc Connection Release .................................................................................. 86
Collection Time for S1APUEAmbrOverride .................................................................................... 87
Collection Time for S1APUEAmbrOverride in S1 handover case ................................................... 87
Collection Time for X2APUEAmbrOverride in X2 handover case ................................................... 88
Collection Time for E-RAB erase..................................................................................................... 91
Collection Time for E-RAB Erase Request ....................................................................................... 91
Collection Time for EraseAttbyEnb_CpCcTo .................................................................................. 92
Collection Time for EraseAttbyEnb_CpCcFail ................................................................................. 92
Collection Time for EraseAttbyEnb_UpGtpFail .............................................................................. 92
Collection Time for EraseAttbyEnb_UpMacFail ............................................................................. 92
Collection Time for EraseAttbyEnb_UpMacUEInact ...................................................................... 93
Collection Time for EraseAttbyEnb_UpPdcpFail ............................................................................ 93
Collection Time for EraseAttbyEnb_UpRlcFail ............................................................................... 93
Collection Time for EraseAttbyEnb_RrcHcTo ................................................................................. 94
Collection Time for EraseAttbyEnb_RrcSigFail ............................................................................... 94
Collection Time for EraseAttbyEnb_RrcSigTo................................................................................. 95
Collection Time for EraseAttbyEnb_S1apCuFail ............................................................................. 95
Collection Time for EraseAttbyEnb_S1apRoTo .............................................................................. 95
Collection Time for EraseAttbyEnb_S1apSigTo .............................................................................. 96
Collection Time for EraseAttbyEnb_X2apRoTo .............................................................................. 96
Collection Time for E-RAB Setup .................................................................................................... 97
Collection Time for ErabInitFailNbr_CpCcTo .................................................................................. 97
Collection Time for ErabInitFailNbr_CpCcFail ................................................................................ 97
Collection Time for ErabInitFailNbr_UpGtpFail .............................................................................. 98
Collection Time for ErabInitFailNbr_UpMacFail ............................................................................. 98
Collection Time for ErabInitFailNbr_UpPdcpFail ............................................................................ 98
Collection Time for ErabInitFailNbr_UpRlcFail ............................................................................... 99
Collection Time for ErabInitFailNbr_RrcSigFail .............................................................................. 99
Collection Time for ErabInitFailNbr_RrcSigTo .............................................................................. 100
Collection Time for ErabInitFailNbr_CpBhCacFail ........................................................................ 100
Collection Time for ErabInitFailNbr_CpCapaCacFail .................................................................... 100
Collection Time for ErabInitFailNbr_CpQosCacFail ...................................................................... 101
Collection Time for ErabInitFailNbr_S1apCuFail .......................................................................... 101
Collection Time for ErabInitFailNbr_S1apLinkFail ........................................................................ 101
Collection Time for ErabInitFailNbr_S1apSigFail .......................................................................... 101
Collection Time for ErabAddFailNbr_CpCcTo ............................................................................... 102
Collection Time for ErabAddFailNbr_CpCcFail ............................................................................. 102
Collection Time for ErabAddFailNbr_UpGtpFail ........................................................................... 102
Collection Time for ErabAddFailNbr_UpMacFail .......................................................................... 103
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
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List of Figures
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Collection Time for ErabAddFailNbr_UpPdcpFail ......................................................................... 103
Collection Time for ErabAddFailNbr_UpRlcFail ............................................................................ 103
Collection Time for ErabAddFailNbr_RrcSigFail ........................................................................... 104
Collection Time for ErabAddFailNbr_RrcSigTo ............................................................................. 104
Collection Time for ErabAddFailNbr_CpBhCacFail ....................................................................... 104
Collection Time for ErabAddFailNbr_CpCapaCacFail ................................................................... 104
Collection Time for ErabAddFailNbr_CpQosCacFail ..................................................................... 105
Collection Time for ErabAddFailNbr_S1apCuFail ......................................................................... 105
Collection Time for ErabAddFailNbr_S1apLinkFail ....................................................................... 105
Collection Time for ErabAddFailNbr_S1apSigFail ......................................................................... 105
Collection Time for ErabAddFailNbr_CpCcInteraction ................................................................. 106
Collection Time for E-RAB modify ................................................................................................ 106
Collection Time for ModQoSFailNbr_CpCcTo .............................................................................. 107
Collection Time for ModQoSFailNbr_CpCcFail ............................................................................. 107
Collection Time for ModQoSFailNbr_UpGtpFail .......................................................................... 107
Collection Time for ModQoSFailNbr_UpMacFail ......................................................................... 107
Collection Time for ModQoSFailNbr_UpPdcpFail ........................................................................ 108
Collection Time for ModQoSFailNbr_UpRlcFail ........................................................................... 108
Collection Time for ModQoSFailNbr_RrcSigFail ........................................................................... 108
Collection Time for ModQoSFailNbr_RrcSigTo ............................................................................ 109
Collection Time for ModQoSFailNbr_CpBhCacFail ....................................................................... 109
Collection Time for ModQoSFailNbr_CpCapaCacFail ................................................................... 109
Collection Time for ModQoSFailNbr_CpQosCacFail ..................................................................... 109
Collection Time for ModQoSFailNbr_S1apCuFail ......................................................................... 110
Collection Time for ModQoSFailNbr_S1apLinkFail ...................................................................... 110
Collection Time for ModQoSFailNbr_S1apSigFail ........................................................................ 110
Collection Time for ModQoSFailNbr_CpCcInteraction................................................................. 111
Collection Time for UsageNbrAvg/Max/Tot/Cnt .......................................................................... 111
Collection Time for PLMN0~5QCIReject ...................................................................................... 112
Collection Time for E-RAB release ................................................................................................ 112
Collection Time for RelFailNbr_CpCcFail ...................................................................................... 112
Collection Time for RelFailNbr_S1apSigFail ................................................................................. 113
Collection Time for RelFailNbr_S1apCuFail .................................................................................. 113
Collection Time for RelActive ....................................................................................................... 113
Collection Time for RelFailNbr_CpCcInteraction .......................................................................... 114
Collection Time for eNB E-RAB release request ........................................................................... 114
Collection Time for RelAttbyEnbNbr_CpCcTo .............................................................................. 115
Collection Time for RelAttbyEnbNbr_S1apCuFail ........................................................................ 115
Collection Time for SessionTimeQciAvg/Tot/Cnt ......................................................................... 115
Collection Time for SessionTimeUEAvg/Tot/Cnt .......................................................................... 116
Collection Time for E-RAB Setup time .......................................................................................... 116
Collection Time for E-RAB Setup time (Cause) ............................................................................. 117
Collection Time for UE Category .................................................................................................. 118
Collection Time for Measurement Report ................................................................................... 119
S1 Handover Procedure ............................................................................................................... 120
X2 Based Handover Statistics processing ..................................................................................... 122
Intra-eNB HandoverStatistics processing ..................................................................................... 123
Collection Time for Intra eNB Handover ...................................................................................... 124
Collection Time for IntraEnbPrepFail_CpCcTo ............................................................................. 124
Collection Time for IntraEnbPrepFail_CpCcFail (1) ...................................................................... 125
Collection Time for IntraEnbPrepFail_CpCcFail (2) ...................................................................... 126
Collection Time for IntraEnbPrepFail_CpCcFail (3) ...................................................................... 127
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List of Figures
Figure 256.
Figure 257.
Figure 258.
Figure 259.
Figure 260.
Figure 261.
Figure 262.
Figure 263.
Figure 264.
Figure 265.
Figure 266.
Figure 267.
Figure 268.
Figure 269.
Figure 270.
Figure 271.
Figure 272.
Figure 273.
Figure 274.
Figure 275.
Figure 276.
Figure 277.
Figure 278.
Figure 279.
Figure 280.
Figure 281.
Figure 282.
Figure 283.
Figure 284.
Figure 285.
Figure 286.
Figure 287.
Figure 288.
Figure 289.
Figure 290.
Figure 291.
Figure 292.
Figure 293.
Figure 294.
Figure 295.
Figure 296.
Figure 297.
Figure 298.
Figure 299.
Figure 300.
Figure 301.
Figure 302.
Figure 303.
Figure 304.
Figure 305.
Figure 306.
Figure 307.
Collection Time for IntraEnbPrepFail_CpCcFail (4) ...................................................................... 128
Collection Time for IntraEnbPrepFail_UpMacFail (1) ................................................................... 129
Collection Time for IntraEnbPrepFail_UpMacFail (2) ................................................................... 130
Collection Time for IntraEnbPrepFail_UpRlcFail (1) ..................................................................... 131
Collection Time for IntraEnbPrepFail_UpRlcFail (2) ..................................................................... 132
Collection Time for IntraEnbPrepFail_CpBhCacFail ..................................................................... 133
Collection Time for IntraEnbPrepFail_CpCapaCacFail .................................................................. 134
Collection Time for IntraEnbPrepFail_CpQosCacFail ................................................................... 135
Collection Time for IntraEnbPrepFail_S1apCuFail ........................................................................ 136
Collection Time for IntraEnbPrepFail_S1apLinkFail (1) ................................................................ 137
Collection Time for IntraEnbPrepFail_S1apLinkFail (2) ................................................................ 138
Collection Time for IntraEnbPrepFail_S1apSigFail (1) .................................................................. 139
Collection Time for IntraEnbPrepFail_S1apSigFail (2) .................................................................. 140
Collection Time for IntraEnbFail_CpCcTo ..................................................................................... 141
Collection Time for IntraEnbFail_CpCcFail (1) .............................................................................. 142
Collection Time for IntraEnbFail_CpCcFail (2) .............................................................................. 143
Collection Time for IntraEnbFail_CpCcFail (3) .............................................................................. 144
Collection Time for IntraEnbFail_UpMacFail................................................................................ 145
Collection Time for IntraEnbFail_UpRlcFail (1) ............................................................................ 146
Collection Time for IntraEnbFail_UpRlcFail (2) ............................................................................ 147
Collection Time for IntraEnbFail_RrcHcTo (1) .............................................................................. 148
Collection Time for IntraEnbFail_RrcHcTo (2) .............................................................................. 149
Collection Time for IntraEnbFail_S1apCuFail ............................................................................... 150
Collection Time for IntraEnbFail_S1apLinkFail (1)........................................................................ 151
Collection Time for IntraEnbFail_S1apLinkFail (2)........................................................................ 152
Collection Time for IntraEnbFail_S1apSigFail (1) ......................................................................... 153
Collection Time for IntraEnbFail_S1apSigFail (2) ......................................................................... 154
Collection Time for S1 In Handover.............................................................................................. 155
Collection Time for InterS1InPrep_FailCpCcTo ............................................................................ 156
Collection Time for InterS1InPrep_FailCpCcFail (1) ..................................................................... 156
Collection Time for InterS1InPrep_FailCpCcFail (2) ..................................................................... 157
Collection Time for InterS1InPrep_FailCpCcFail (3) ..................................................................... 157
Collection Time for InterS1InPrep_FailCpCcFail (4) ..................................................................... 158
Collection Time for InterS1InPrep_FailUpGtpFail ........................................................................ 158
Collection Time for InterS1InPrep_FailUpMacFail ....................................................................... 159
Collection Time for InterS1InPrep_FailUpPdcpFail ...................................................................... 159
Collection Time for InterS1InPrep_FailUpRlcFail ......................................................................... 160
Collection Time for InterS1InPrep_FailCpBhCacFail ..................................................................... 160
Collection Time for InterS1InPrep_FailCpCapaCacFail ................................................................. 161
Collection Time for InterS1InPrep_FailCpQosCacFail ................................................................... 161
Collection Time for InterS1InPrep_FailS1apCuFail ....................................................................... 162
Collection Time for InterS1InPrep_FailS1apLinkFail (1) ............................................................... 162
Collection Time for InterS1InPrep_FailS1apLinkFail (2) ............................................................... 163
Collection Time for InterS1InPrep_FailS1apSigFail (1) ................................................................. 163
Collection Time for InterS1InPrep_FailS1apSigFail (2) ................................................................. 164
Collection Time for InterS1InFail_CpCcTo .................................................................................... 164
Collection Time for InterS1InFail_CpCcFail (1) ............................................................................. 165
Collection Time for InterS1InFail_CpCcFail (2) ............................................................................. 165
Collection Time for InterS1InFail_CpCcFail (3) ............................................................................. 166
Collection Time for InterS1InFail_UpPdcpFail .............................................................................. 166
Collection Time for InterS1InFail_RrcHcTo .................................................................................. 167
Collection Time for InterS1InFail_S1apCuFail .............................................................................. 167
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List of Figures
Figure 308.
Figure 309.
Figure 310.
Figure 311.
Figure 312.
Figure 313.
Figure 314.
Figure 315.
Figure 316.
Figure 317.
Figure 318.
Figure 319.
Figure 320.
Figure 321.
Figure 322.
Figure 323.
Figure 324.
Figure 325.
Figure 326.
Figure 327.
Figure 328.
Figure 329.
Figure 330.
Figure 331.
Figure 332.
Figure 333.
Figure 334.
Figure 335.
Figure 336.
Figure 337.
Figure 338.
Figure 339.
Figure 340.
Figure 341.
Figure 342.
Figure 343.
Figure 344.
Figure 345.
Figure 346.
Figure 347.
Figure 348.
Figure 349.
Figure 350.
Figure 351.
Figure 352.
Figure 353.
Figure 354.
Figure 355.
Figure 356.
Figure 357.
Figure 358.
Figure 359.
Collection Time for InterS1InFail_S1apLinkFail (1) ....................................................................... 168
Collection Time for InterS1InFail_S1apLinkFail (2) ....................................................................... 168
Collection Time for InterS1InFail_S1apSigFail (1) ........................................................................ 169
Collection Time for InterS1InFail_S1apSigFail (2) ........................................................................ 169
Collection Time for InterS1InFail_S1apSigTo ............................................................................... 170
Collection Time for S1 Out Handover........................................................................................... 170
Collection Time for InterS1OutPrepFail_CpCcFail (1) .................................................................. 171
Collection Time for InterS1OutPrepFail_CpCcFail (2) .................................................................. 172
Collection Time for InterS1OutPrepFail_CpCcFail (3) .................................................................. 173
Collection Time for InterS1OutPrepFail_S1apCuFail .................................................................... 174
Collection Time for InterS1OutPrepFail_S1apLinkFail ................................................................. 175
Collection Time for InterS1OutPrepFail_S1apLinkFail ................................................................. 176
Collection Time for InterS1OutPrepFail_S1apRpTo ..................................................................... 177
Collection Time for InterS1OutPrepFail_S1apSigFail (1) .............................................................. 178
Collection Time for InterS1OutPrepFail_S1apSigFail (2) .............................................................. 179
Collection Time for InterS1OutFail_CpCcTo (1) ........................................................................... 180
Collection Time for InterS1OutFail_CpCcTo (2) ........................................................................... 180
Collection Time for InterS1OutFail_CpCcTo (3) ........................................................................... 181
Collection Time for InterS1OutFail_CpCcFail (1) .......................................................................... 181
Collection Time for InterS1OutFail_CpCcFail (2) .......................................................................... 182
Collection Time for InterS1OutFail_CpCcFail (3) .......................................................................... 182
Collection Time for InterS1OutFail_UpGtpFail ............................................................................. 183
Collection Time for InterS1OutFail_UpPdcpFail ........................................................................... 183
Collection Time for InterS1OutFail_UpRlcFail .............................................................................. 184
Collection Time for InterS1OutFail_S1apCuFail ........................................................................... 184
Collection Time for InterS1OutFail_S1apLinkFail (1) .................................................................... 185
Collection Time for InterS1OutFail_S1apLinkFail (2) .................................................................... 185
Collection Time for InterS1OutFail_S1apRoTo ............................................................................. 186
Collection Time for InterS1OutFail_S1apSigFail (1)...................................................................... 186
Collection Time for InterS1OutFail_S1apSigFail (2)...................................................................... 187
Collection Time for Handover Time (Intra) .................................................................................. 187
Collection Time for Handover Time (Inter S1).............................................................................. 188
Collection Time for Handover Time (Inter X2) ............................................................................. 188
Collection Time for Measurement Results of Source Cell ............................................................ 189
Collection Time for Measurement Report of Target Cell ............................................................. 189
Collection Time for X2 In Handover ............................................................................................. 190
Collection Time for InterX2InPrepFail_CpCcTo ............................................................................ 191
Collection Time for InterX2InPrepFail_CpCcFail........................................................................... 191
Collection Time for InterX2InPrepFail_UpGtpFail ........................................................................ 192
Collection Time for InterX2InPrepFail_UpMacFail ....................................................................... 192
Collection Time for InterX2InPrepFail_UpPdcpFail ...................................................................... 193
Collection Time for InterX2InPrepFail_UpRlcFail ......................................................................... 193
Collection Time for InterX2InPrepFail_CpBhCacFail .................................................................... 194
Collection Time for InterX2InPrepFail_CpCapaCacFail ................................................................. 194
Collection Time for InterX2InPrepFail_CpQosCacFail .................................................................. 195
Collection Time for InterX2InPrepFail_S1apLinkFail .................................................................... 195
Collection Time for InterX2InPrepFail_S1apSigFail ...................................................................... 196
Collection Time for InterX2InPrepFail_X2apCuFail ...................................................................... 196
Collection Time for InterX2InPrepFail_X2apSigFail ...................................................................... 197
Collection Time for InterX2InFail_CpCcTo (1) .............................................................................. 198
Collection Time for InterX2InFail_CpCcTo (2) .............................................................................. 199
Collection Time for InterX2InFail_CpCcFail .................................................................................. 200
LTE eNB Counter Description for SLR 6.0.0 v3.0
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List of Figures
Figure 360.
Figure 361.
Figure 362.
Figure 363.
Figure 364.
Figure 365.
Figure 366.
Figure 367.
Figure 368.
Figure 369.
Figure 370.
Figure 371.
Figure 372.
Figure 373.
Figure 374.
Figure 375.
Figure 376.
Figure 377.
Figure 378.
Figure 379.
Figure 380.
Figure 381.
Figure 382.
Figure 383.
Figure 384.
Figure 385.
Figure 386.
Figure 387.
Figure 388.
Figure 389.
Figure 390.
Figure 391.
Collection Time for InterX2InFail_UpGtpFail ............................................................................... 201
Collection Time for InterX2InFail_UpPdcpFail ............................................................................. 202
Collection Time for InterX2InFail_RrcHcTo .................................................................................. 203
Collection Time for InterX2InFail_S1apLinkFail ............................................................................ 204
Collection Time for InterX2InFail_S1apCuFail .............................................................................. 205
Collection Time for InterX2InFail_S1apPathTo ............................................................................ 206
Collection Time for InterX2InFail_S1apSigFail.............................................................................. 207
Collection Time for InterX2InFail_X2apSigFail ............................................................................. 208
Collection Time for InterX2InFail_X2apSigTo ............................................................................... 209
Collection Time for X2 Out Handover .......................................................................................... 210
Collection Time for InterX2OutPrepFail_CpCcFail........................................................................ 211
Collection Time for InterX2OutPrepFail_S1apLinkFail ................................................................. 211
Collection Time for InterX2OutPrepFail_S1apSigFail ................................................................... 212
Collection Time for InterX2OutPrepFail_X2apCuFail ................................................................... 212
Collection Time for InterX2OutPrepFail_X2apRpTo ..................................................................... 213
Collection Time for InterX2OutFail_CpCcTo ................................................................................. 213
Collection Time for InterX2OutFail_CpCcFail ............................................................................... 214
Collection Time for InterX2OutFail_UpGtpFail ............................................................................ 215
Collection Time for InterX2OutFail_UpMacFail ........................................................................... 215
Collection Time for InterX2OutFail_UpPdcpFail........................................................................... 216
Collection Time for InterX2OutFail_UpRlcFail .............................................................................. 216
Collection Time for InterX2OutFail_S1apCuFail ........................................................................... 217
Collection Time for InterX2OutFail_S1apLinkFail ......................................................................... 218
Collection Time for InterX2OutFail_S1apSigFail ........................................................................... 219
Collection Time for InterX2OutFail_X2apRoTo ............................................................................ 220
Collection Time for Preemption Handover (Intra) ....................................................................... 220
Collection Time for Preemption Handover (Inter X2) .................................................................. 221
Collection Time for Preemption Handover (Inter S1) .................................................................. 222
Collection Time for Preemption Handover per E-RAB (Intra) ...................................................... 222
Collection Time for Preemption Handover per E-RAB (Inter X2) ................................................. 223
Collection Time for Preemption Handover per E-RAB (Inter S1) ................................................. 223
PS Handover Procedure from E-UTRAN to UTRAN ...................................................................... 224
LTE eNB Counter Description for SLR 6.0.0 v3.0
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List of Tables
Table 1.
Counter Description Fields ............................................................................................................... 1
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
This description provides call flows and detailed description for statistic items
collected in the LTE eNB system for analysis.
Relevance
This manual applies to the following products/software.
Name
Type
SLR 6.0.0
Software
Conventions in this Document
Samsung Networks product documentation uses the following conventions.
Symbols
Symbol
Description
Indicates a task.
Indicates a shortcut or an alternative method.
Provides additional information.
Provides information or instructions that you should follow to avoid service
failure or damage to equipment.
Provides information or instructions that you should follow to avoid personal
injury or fatality.
Provides antistatic precautions that you should observe.
Menu Commands
menu | command
This indicates that you must select a command on a menu, where menu is the
name of the menu, and command is the name of the command on that menu.
File Names and Paths
These are indicated by a bold typeface. For example:
Copy filename.txt into the /home/folder1/folder2/bin/ folder.
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
User Input and Console Screen Output Text
Input and output text is presented in the Courier font. For example,
context <designated epc-context-name>
CLI commands are presented in bold small caps. For example,
Type the RTRV-NE-STS command in the input field.
New and Changed Information
The following table describes information that has been added or changed since
the previous publication of this document.
Item
Description
Added Counter
Description Field
Following Counter Description Field information has been added in
Table 1. Counter Description Fields and attached Counter Excel file.
 Data type for OSS NBI
Added Family
Following Families have been added.(Family Display Name)
 GERAN MRO
 MRO RLF VOICE Classification
 UTRAN MRO with Connection Failure
 DL ICIC RNTP Information
 Active DRX
 CQI for DL Volte bearer
 Semi-Persistent Scheduling
 Semi-Persistent Scheduling in MAC
 TTI Bundling
 TTI Bundling in MAC
 Bin distribution of SINR for UL Volte bearer
 HARQ performance for Volte bearer
 VoLTE Handover
 VoLTE Handover time
 VoLTE Quality Defect
 GTP Downlink Traffic Control
 DL PDCP PDU discard rate
 PDCCH Usage Information
 Two-Way Active Measurement Protocol
 Two-Way Active Measurement Protocol Light
 Per Segment Two-Way Active Measurement Protocol
 CFM Y.1731 Performance Monitoring
 Power Headroom Report
 Average Interference Power per PRB in the PUCCH Region
 PUCCH SINR Distribution per bin
 The Number of UEs per RRH
 SINR Distribution
 Inter-Frequency Handover for CA
 CA UE per number of CC
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
Item
Description





















SCell Added Information (PCell)
TTI Bundling Time
VoLTE Quality
Double S1 Information
Measurement Report
OnDemand Handover IntraENB In
OnDemand Handover IntraENB Out
OnDemand Redirection
OnDemand Handover S1 In
OnDemand Handover S1 Out
OnDemand Handover X2 In
OnDemand Handover X2 Out
Released UE by Timer
Measurement Results of Source Cell
Measurement Results of Target Cell
Preemption Handover
Preemption Handover per E-RAB
Not selected MRs for handover
MRs triggered by serving cell
Integrated UTRAN Out
Inter Rat Handover Cancellation
Changed family
description
Following family description has been changed.
 Family Display Name: TTI Bundling Time
Added type
Following types have been added.
 Family Display Name: Call Fail
o [0x37A]Rrm_Preemption
o [0x037B]Rrm_BlacklistImeisvFail
o [0x037C]Rrm_BlacklistImeisvPrepFail
o [0x0360]Ecc_UeCapabilityInformationFail
o [0x0361]Ecc_IntraHoSucc
 Family Display Name: eICIC ABS Pattern Info
o AvgABSNumForTdd
o ABSBin0ForTdd
o ABSBin4ForTdd
o ABSBin5ForTdd
o ABSBin6ForTdd
o ABSBin7ForTdd
o ABSBin8ForTdd
o ABSBin9ForTdd
o ABSBin10ForTdd
o ABSBin11ForTdd
o ABSBin12ForTdd
o ABSBin13ForTdd
o ABSBin0ForTddUsedCnt
o ABSBin4ForTddUsedCnt
o ABSBin5ForTddUsedCnt
o ABSBin6ForTddUsedCnt
o ABSBin7ForTddUsedCnt
o ABSBin8ForTddUsedCnt
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
Item
Description
o ABSBin9ForTddUsedCnt
o ABSBin10ForTddUsedCnt
o ABSBin11ForTddUsedCnt
o ABSBin12ForTddUsedCnt
o ABSBin13ForTddUsedCnt
o ABSBin2ForTdd
o ABSBin3ForTdd
o ABSBin2ForTddUsedCnt
o ABSBin3ForTddUsedCnt
 Family Display Name: eICIC Partnership
o FeICICHOAtt
o FeICICHOSucc
o EICICCIOAvg
o EICICCIOMin
o EICICCIOMax
o EICICCIOTot
o EICICCIOCnt
o FeICICCIOAvg
o FeICICCIOMin
o FeICICCIOMax
o FeICICCIOTot
o FeICICCIOCnt
 Family Display Name: GTP Sequence Number per eNB
o GtpSnEnbDeltaLoss
o GtpSnEnbDeltaLossRate
 Family Display Name: GTP Sequence Number per QCI
o GtpSnQciDeltaLoss
o GtpSnQciDLCnt
 Family Display Name: Packet Loss Rate
o PdcpSduTotalULNum
o PdcpSduLossULNum
o PdcpSduTotalDLNum
o PdcpSduLossDLNum
 Family Display Name: Cell Unavailable Time
o CellUnavailableTimeES
 Family Display Name: PDCP Packet
o RoHCDecompFailRate
o RoHCDecompFailCnt
o RoHCDecompSuccCnt
 Family Display Name: Random Access Preambles
o HandoverDedicatedPreambles
o RandomAccessResponses
 Family Display Name: Timing Alignment
o TimeAdvanceSection21
o TimeAdvanceSection22
o TimeAdvanceSection23
o TimeAdvanceSection24
o TimeAdvanceSection25
o TimeAdvanceSection26
o TimeAdvanceSection27
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
Item
Description
o TimeAdvanceSection28
o TimeAdvanceSection29
o TimeAdvanceSection30
 Family Display Name: RRC Connection Release
o ConnRelease_CpPreemption
 Family Display Name: RRC Message
o RrcInDeviceCoexIndication
o RrcLoggedMeasurementConfiguration
o RrcUEAssistanceInformation
 Family Display Name: Carrier Aggregation Message count for
Activation-Deactivation (SCell)
o SCellActivationAtt
o SCellActFailCaCac
o SCellActFailSCellSetupTimeOut
o SCellActFailActMacCeResBler
 Family Display Name: Carrier Aggregation Message count for
Addition-Release (SCell)
o SCellAddAtt_RrcSig
o SCellAddAtt_EventA4
o SCellAddAtt_EventA6
o SCellAddAtt_RrcResetup
o SCellRel_SbcPriority
o SCellAddAtt_AddSbcRrcSig
o SCellAddAtt_AddSbcHoIn
o SCellAddAtt_AddSbcRrcResetup
o SCellAddSucc_AddSbcRrcSig
o SCellAddSucc_AddSbcHoIn
o SCellAddSucc_AddSbcRrcResetup
o SCellRel_AddSbcRrcSig
o SCellRel_AddSbcHoIn
o SCellRel_AddSbcRrcResetup
 Family Display Name: Carrier Aggregation capable UEs (PCell)
o CaUECapaEnquiryAdditionalSbc
o CaUECapaInformationAdditionalSbc
 Family Display Name: E-RAB Erase Request
o EraseAttbyEnb_CpPreemption
 Family Display Name: E-RAB Release
o RelActive_MmeInitErabRelease
o RelActive_ResetRelease
o RelActive_ErabRelease
 Family Display Name: E-RAB Release Request
o RelAttbyEnbNbr_CpPreemption
 Family Display Name: UE Category
o UECategory6
o UECategory7
o UECategory8
o UECategory9
o UECategory10
o UECategory11
o UECategory12
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
Item
Description
o UECategory13
o UECategory14
o UECategory15
o UECategory0
 Family Display Name: Intra-eNB Handover per QCI
o IntraEnbCanc_QCI
 Family Display Name: S1 Out Handover per QCI
o InterS1OutCanc_QCI
 Family Display Name: X2 In Handover per QCI
o InterX2In_cancelled_QCI
 Family Display Name: X2 Out Handover per QCI
o InterX2Out_cancelled_QCI
 Family Display Name: Integrated UTRAN Out
o CsfbToUtranCancel_Integ
o SrvccToUtranCancel_Integ
o PsHoToUtranCancel_Integ
Changed Type
Description
Following type descriptions have been changed.
 Family Display Name: TTI Bundling Time
o TtibActTimeAvg
o TtibActTimeRate
 Family Display Name: HO_S1_OUT
o InterS1OutAtt
 Family Display Name: HO_S1_OUT_QCI
o InterS1OutAtt_QCI
 Family Display Name: HO_X2_OUT
o InterX2OutAtt
 Family Display Name: HO_X2_OUT_QCI
o InterX2OutAtt_QCI
Changed Trigger
Triggers for the following types have been changed.
 Family Display Name: eICIC Partnership
o CompositeAvailCapa
o DLABSstatus
 Family Display Name: Two-Way Active Measurement Protocol
Light
o TwampLightSlaDelayAvg
o TwampLightSlaDelayMin
o TwampLightSlaDelayMax
o TwampLightSlaJitterAvg
o TwampLightSlaJitterMin
o TwampLightSlaJitterMax
o TwampLightSlaMosAvg
o TwampLightSlaLoss
o TwampLightSlaReordering
o TwampLightSlaDuplicate
o TwampLightSlaTxPacket
o TwampLightSlaSkip
o TwampLightSlaAvailCnt
o TwampLightSlaUnavailCnt
o TwampLightSlaLossRatioAvg
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
Item
Description
o TwampLightSlaLossRatioCnt
Changed Counter
Type and Period
Following Counter Type and Period have been changed.
 Family Display Name: Ethernet Packet (Pico)
o PicoIfSpeed
Changed Hourly,
Daily, Monthly
Calculation
Hourly, Daily, Monthly Calculations for the following types have
been changed.
 Family Display Name: GTP Sequence Number per eNB
o GtpSnEnbLossRate
 Family Display Name: Packet Loss Rate
o PdcpSduLossRateUL
o PdcpSduAirIntfAvg
 Family Display Name: Integrity
o EutranIpThroughput
o EutranIpLatency
ROUND function has been added to the Hourly, Daily, Monthly
Calculations for the following types.
 Family Display Name: DL Wideband CQI
o DLReceivedCQIAvg
 Family Display Name: DL RI
o LReceivedRIAvg
 Family Display Name: DL Wideband CQI (SCell)
o DLReceivedCQIAvg
 Family Display Name: DL Wideband CQI (PCell)
o DLReceivedCQIAvg
The expressions of the Hourly, Daily, Monthly Calculations for the
following types have been changed and the results have not
changed.
 Family Display Name: Air MAC Packet
o ULIpThruAvg
 Family Display Name: Air RLC Packet
o IpThru
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
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Preface
Revision History
The following table lists all versions of this document.
Document Number
Product/Software
Version
Document Version
Publication Date
Remarks
2600-00G1G3GAT
SLR 3.1
1.0
October 2014
First version
2600-00H4OMGAT
SLR 4.5
1.0
December 2014
-
2600-00H4OMGAT
SLR 4.5
2.0
March 2015
-
2600-00H4OMGAT
SLR 4.5
3.0
May 2015
-
2600-00H4OMGAT
SLR 4.5
4.0
June 2015
-
2600-00H4OMGAT
SLR 4.5
5.0
August 2015
-
2600-00H4OMGAT
SLR 4.5
6.0
December 2015
-
2600-00H4OMGAT
SLR 4.5
7.0
February 2016
-
2600-00H4OMGAT
SLR 4.5
8.0
February 2016
-
2600-00H4OMGAT
SLR 4.5
9.0
March 2016
-
2600-00H4OMGAT
SLR 4.5
10.0
May 2016
-
2600-00J7NNGAT
SLR 6.0
1.0
June 2016
-
2600-00J7NNGAT
SLR 6.0
2.0
July 2016
-
2600-00J7NNGAT
SLR 6.0
3.0
April 2017
-
Organization of This Document
Section
Title
Description
Chapter 1
Introduction
This chapter describes the information of counter description
fields.
Chapter 2
Counter Descriptions
This chapter describes index, family and type information of
counters.
Appendix A
Acronyms
This chapter lists the acronyms used in this document.
Appendix B
Call Flow
This chapter describes call flows in the eNB system.
Related Documentation

Samsung LTE eNB Operation Manual
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Preface
Personal and Product Safety
This product safety information includes European directives, which you must
follow. If these do not apply in your country, please follow similar directives that
do apply in your country.
CE Marking
Samsung networks equipment supplied to certain European countries carries a CE
marking. This is the manufacturer's declaration demonstrating that the product
complies with the Radio and Telecommunications Terminal Equipment (R & TTE)
Directive (1999/5/EC).
Electrical
The product is designed to operate from a -48 V DC supply and is therefore
classified as Safe Extra Low Voltage (SELV) equipment.
All structural parts are grounded and all input and outputs have built-in isolation
from the network. All input and output ports that connect to external power
sources are designed to meet relevant national safety requirements.
The product contains hazardous energy levels as defined by EN 60950. Care must
be taken when maintaining this equipment as injury to personnel or damage to the
equipment could result from mistakes. Maintenance should only be carried out by
trained and competent engineers who are familiar with the relevant procedures and
instructions.
Lasers
The product is fitted with optic modules rated as Class 1 radiation-emitting devices
under EN 60825-1. During installation, operation, and maintenance, never look
into the end of an optical fiber directly or by reflection either with the naked eye or
through an optical instrument. Do not operate equipment with exposed fiber
connectors-cover these with fiber cables or blanking caps. Do not remove
equipment covers during operation unless requested to do so in the documentation.
Carry out normal safety precautions when trimming fibers during installation.
Manual Handling
Care should be taken when handling equipment. Give due consideration to the
weight of the equipment, the physical capability of the individual(s) handling the
equipment, and movements such as twisting, bending and stooping, which could
lead to skeletal and muscular injuries.
Installation
Installation must be carried out by trained and competent engineers only. All
relevant safety measures should be taken to ensure equipment is not connected to
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Preface
live power and transmission sources during installation. Equipment must be
correctly installed in order to meet the relevant safety standards and approval
conditions.
Each power feed to the unit requires a separate fused feed from the provided
power supply. The cable between the power distribution point and the installed
equipment must have a minimum cross-sectional area of 2.5 mm2.
Rack-mountable equipment must be placed in a standard 19-inch rack and secured
with the appropriate fixings as detailed in the installation manual.
Maintenance
Maintenance must only be carried out by a suitably trained and competent
technician. All safety instructions must be carefully observed at all times.
Equipment covers should not be removed while live power and transmission is
connected unless in a controlled environment by trained technicians.
Fire
The product is powered from a -48 V DC supply. To protect against fire, the
equipment is fused.
Environment
The product must be operated in an environment with the specified relative
humidity and ambient temperature ranges.
Keep all liquids away from the equipment as accidental spillage can cause severe
damage.
Cooling
The product cools down by its own set of cooling fans housed in a fan module.
Each fan module detects a fan that is not operating normally. LEDs on the front
panel of the fan tray provide an alarm indication in the event of fan failure.
In the event of fan failure, take urgent remedial action to restore full cooling
capacity.
Take appropriate measures to ensure that fan modules do not start spinning during
repair and maintenance procedures.
Anti-Static Precautions
The circuit boards and other modules in the product are sensitive to and easily
damaged by static electricity. If any card or sub-assembly is removed from the unit,
the following anti-static precautions must be observed at all times:

Service personnel must wear anti-static wrist straps.

Circuit boards and sub-assemblies must be placed on ground conductive mats
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Preface
or in conductive bags.

All tools must be discharged to ground before use.

The anti-static wrist strap and cord must be checked at regular intervals for
their suitability for use.
Grounding
To comply with EN 60950, the equipment must be connected to a safety
grounding point via a permanent link. Grounding points are located on the product
for this purpose. Always connect the ground cable before fitting other cables. The
product must remain grounded continuously unless all connections to the power
supply and data network are all removed.
If equipment is grounded through a cabinet or rack, make sure it is done so
properly according to the installation instructions.
Power Supply Connection
The equipment is designed to be powered from a -48 V DC supply. Power
connections and installation of associated wiring must be carried out by a suitably
qualified technician.
Only devices that comply with all relevant national safety requirements should be
connected to the unit's power supply inlets. Other usage will invalidate any
approval given to this equipment.
Connection of this equipment to devices that are not marked with all relevant
national safety requirements may produce hazardous conditions on the network.
When the power supply is obtained by a rectifier/safety isolation transformer, the
supply must meet the requirements of EN 60950 providing double/reinforced
insulation between hazardous voltages and SELV/TNV circuits. Any battery must
be separated from hazardous voltages by reinforced insulation.
Indirect Connection
Before indirectly connecting any equipment to another device through a shared
power supply, ALWAYS seek advice from a competent engineer.
Devices that are not marked according to the relevant national safety standards
may produce hazardous conditions on the network.
Product Disposal
To reduce the environmental impact of products, Samsung has joined WEEE
compliance activities.
The WEEE symbol on the product indicates that the product is covered by the
European Directive 2002/96/CE for the disposal of Waste Electrical and Electronic
Equipment (WEEE). This means that the product should be disposed of separately
from the municipal waste stream via designated collection facilities appointed by
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Preface
the government or the local authorities. This will help prevent potential negative
consequences for the environment and human health. Please check the terms and
conditions of the purchase contract for information about correct disposal.
Battery Disposal
The product contains a battery on the processor card. The battery should not be
disposed of with other household waste. Where marked, the chemical symbols Hg,
Cd or Pb indicate that the battery contains mercury, cadmium or lead above the
reference levels in EC Directive 2006/66. The battery incorporated in this product
is not user replaceable. For information on its replacement, please contact your
service provider. Do not attempt to remove the battery or dispose it in a fire. Do
not disassemble, crush, or puncture the battery.
End of life recycling materials information is available from Samsung.
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Preface
Equipment Markings
Hereby, Samsung Electronics, declares that this [SMM-BMDA6/SLSBR009C/SLS-BR00YJ/SLS-BD10DR/SLS-BD10PJ] is in compliance with
the essential requirements and other relevant provisions of Directive
1999/5/EC.’
The official Declaration of Conformity may be consulted at
Samsung Electronics Euro QA Lab. Blackbushe Business Park Saxony
Way, Yateley, Hampshire GU46 6GG, UK.
‘This equipment may be operated in all EU countries.’
This marking on the product, accessories or literature indicates that the
product and its electronic accessories (e.g. charger, headset, USB cable)
should not be disposed of with other household waste at the end of their
working life. To prevent possible harm to the environment or human health
from uncontrolled waste disposal, please separate these items from other
types of waste and recycle them responsibly to promote the sustainable
reuse of material resources.
Household users should contact either the retailer where they purchased
this product, or their local government office, for details of where and how
they can take these items for environmentally safe recycling.
Business users should contact their supplier and check the terms and
conditions of the purchase contract. This product and its electronic
accessories should not be mixed with other commercial wastes for disposal.
Correct disposal of batteries in this product
(Applicable in countries with separate collection systems.)
The marking on the battery, manual or packaging indicates that the battery
in this product should not be disposed of with other household waste. Where
marked, the chemical symbols Hg, Cd or Pb indicate that the battery
contains mercury, cadmium or lead above the reference levels in EC
Directive 2006/66.
The battery incorporated in this product is not user replaceable. For
information on its replacement, please contact your service provider. Do not
attempt to remove the battery or dispose it in a fire. Do not disassemble,
crush, or puncture the battery. If you intend to discard the product, the waste
collection site will take the appropriate measures for the recycling and
treatment of the product, including the battery.
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Chapter 1
Introduction
The LTE eNB for SLR 6.0.0 counters report statistical performance measurements
by data samples and data points over time.
Each counter can be described using the following items listed in Table 1 below.
Table 1. Counter Description Fields
Field
Description
Category/Category ID
Unique Category ID
Family
Info
Family Display Name
Unique family name used by LSM
Family specifies a group of counters with the same type that can be
identified by the index
Family ID
Unique family name used by LSM
Family Name
Unique name of a family
Family Description
Short description of a family
Data type for OSS NBI
Data type for OSS North Bound Interface(NBI)
Index ID
Unique ID for an index.
Index specifies a logical or physical location of the unit information for
collecting counters
Index Name
Unit for collecting counters
Index Description
Short description of index
Type ID
A certain unique ID assigned to every Counter.
Type Name
The name of a counter
Type Description
Describes a counter
Trigger
Describes the particular trigger event, trigger duration, trigger condition
for the Counter and describes what kind of EVENT updates the counter.
LSM Output Format
Displayed counter type on LSM
Visible
Shows whether a type is displayed in the LSM
NE Type
NE type
Counter Type
The operation of each type
 CC (Cumulative Counter): The NE maintains a running count of the
event being counted. The counter is reset to a well-defined value
(usually 0) at the beginning of each granularity period.
 SI (Status Inspection): Network elements maintain internal counts for
resource management purposes. These counts are read at a
predetermined rate, the rate is usually based upon the expected rate of
change of the count value. Status inspection measurements shall be
reset at the beginning of the granularity period and will only have a
valid result at the end of the granularity period. Application updates the
based value, it calculates average value automatically. Average means
cumulated value divides with update count meaning.
 GAUGE (Gauge): Gauges represent dynamic variables that may
change in either direction. Gauges can be integer or real values. If a
gauge is required to produce low and high tide marks for a granularity
period (e.g. minimum and maximum call duration), then it is reinitialized at the beginning of each granularity period.
 OW (Over-Write): Over-Write represents snapshot variables. OverWrite would be the latest value at the end of the granularity period.
Index
info
Type
Info
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Chapter 1 Introduction
Field
Description
Period
Counter gathering period
Unit
The collection unit of each counter
 % (percentage)
 s (seconds)
 ms (milliseconds)
 count
 Mbyte (Megabytes)
 Mbps (Megabits per second)
Range Min./Max.
Describes min and max value of statistics type
Hourly, Daily, Monthly
Calculation
Describes the hourly, daily, monthly formula for the statistics type
Parameter non-inputting
Calculation Formula
Describes the calculation formula for non-inputting parameter
Collection Unit Formula
Describes the granularity formula for the statistics type
Reference Call Flow
Call flows related to the counter
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Chapter 2
Counter
Description
See the LTE eNB system counters that are listed with details in the separate
Microsoft Excel spreadsheet. (Refer to the attached Counter Excel file.)
LTE eNB Counter
Description for SLR
In the attached Microsoft Excel spreadsheet, the yellow cells mean the modified
items from the previous document version.
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Appendix A Acronyms
CC
CLI
GUI
LTE
NE
OW
SI
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Cumulative Counter
Command Line Interface
Graphic User Interface
Long Term Evolution
Network Element
Over-Write
Status Inspection
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Appendix B Call Flow
See the LTE eNB Call Flow Diagram with each title in the figures.
MRO
RLF Classification
Figure 1. Collection Time for CoverageHole
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment
RRC Connection Reestablishment Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
CoverageHole
counter when meet
the condtion
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Appendix B Call Flow
Figure 2. Collection Time for CoverageHoleN
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment
RRC Connection Reestablishment Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
CoverageHoleN
counter when meet
the condtion
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Appendix B Call Flow
Figure 3. Collection Time for TooEarlyHoFailure
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment
RRC Connection Reestablishment Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
TooEarlyHoFailure
counter when meet
the condition
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Appendix B Call Flow
Figure 4. Collection Time for TooEarlyHoRlfAfterHo
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
X2AP Handover Report
Increase
TooEarlyHoRlfAfterHo
Counter when meet the
condition
Figure 5. Collection Time for TooLateHoRlfBeforeTriggering
Serving
Cell
UE
Target Cell
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
Increase
TooLateHoRlfBeforeTriggering
counter when meet the condition
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Appendix B Call Flow
Figure 6. Collection Time for TooLateHoRlfAfterTriggering
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment
RRC Connection Reestablishment Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
X2AP RLF Indication
Increase
TooLateHoRlfAfterTriggering
counter when meet the condition
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Appendix B Call Flow
Figure 7. Collection Time for WrongCellRlfAfterTriggering
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
Increase
WrongCellRlfAfterTriggering
counter when meet the condition
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Appendix B Call Flow
Figure 8. Collection Time for WrongCellRlfAfterHo
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
X2AP Handover Report
Increase
WrongCellRlfAfterHo
counter when meet the condition
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Appendix B Call Flow
Figure 9. Collection Time for PingpongHandover
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
Increase
PingpongHandover
counter when meet the condition
(using UE history information)
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Appendix B Call Flow
RLF at RRC Connection
Figure 10. Collection Time for CoverageHoleAtSetup
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC_IDLE
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
CoverageHoleAtSetup
counter when meet the
condtion
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Appendix B Call Flow
Figure 11. Collection Time for CoverageHoleAtSetupN
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC_IDLE
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
CoverageHoleAtSetupN
counter when meet the
condtion
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Appendix B Call Flow
Figure 12. Collection Time for TooEarlyHoFailureAtSetup
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC_IDLE
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
TooEarlyHoFailureAtSetup
counter when meet the
condition
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Appendix B Call Flow
Figure 13. Collection Time for Too EarlyHORlfAfterHoAtSetup
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC_IDLE
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
RRC_CONNECTED
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
TooEarlyHORLFAfterHOAtSetup
counter when meet the condition
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Appendix B Call Flow
Figure 14. Collection Time for TooLateHoRlfBeforeTriggerAtSetup
Serving
Cell
UE
Target Cell
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
RRC_CONNECTED
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
X2AP RLF Indication
Increase
TooLateHoRlfBeforeTriggeringAtSetup
counter when meet the condition
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Appendix B Call Flow
Figure 15. Collection Time for HOToWrongCellRlfAfterTriggeringAtSetup
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC_IDLE
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
RRC_CONNECTED
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
X2AP RLF Indication
Increase
HoToWrongCellRlfAfterTriggeringAtSetup
counter when meet the condition
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Appendix B Call Flow
Figure 16. Collection Time for HOToWrongCellRlfAfterHOAtSetup
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
RRC_IDLE
RRC Connection Setup Request
RRC Connection Setup
RRC Connection Setup Complete
RRC_CONNECTED
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
X2AP RLF Indication
Increase
HoToWrongCellRlfAfterHOAtSetup
counter when meet the condition
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Appendix B Call Flow
RLF VOICE Classification
Figure 17. Collection Time for TooEarlyHoFailureVoice
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED (Voice call)
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment
RRC Connection Reestablishment Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
Increase
TooEarlyHoFailureVoice
counter when meet the
condition
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Appendix B Call Flow
Figure 18. Collection Time for TooEarlyHoRlfAfterHoVoice
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED (Voice call)
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
X2AP Handover Report
Increase
TooEarlyHoRlfAfterHoVoice
Counter when meet the
condition
Figure 19. Collection Time for TooLateHoRlfBeforeTriggeringVoice
Serving
Cell
UE
Target Cell
RRC_CONNECTED (Voice call)
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
Increase
TooLateHoRlfBeforeTriggeringVoice
counter when meet the condition
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Appendix B Call Flow
Figure 20. Collection Time for TooLateHoRlfAfterTriggeringVoice
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED (Voice call)
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment
RRC Connection Reestablishment Complete
UE Information Request (rlf-ReportReq)
UE Information Response (rlf-Report)
X2AP RLF Indication
Increase
TooLateHoRlfAfterTriggeringVoice
counter when meet the condition
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Appendix B Call Flow
Figure 21. Collection Time for WrongCellRlfAfterTriggeringVoice
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED (Voice call)
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
Increase
WrongCellRlfAfterTriggeringVoice
counter when meet the condition
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Appendix B Call Flow
Figure 22. Collection Time for WrongCellRlfAfterHoVoice
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED (Voice call)
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
RRC Connection Reestablishment Request
RRC Connection Reestablishment Reject
X2AP RLF Indication
X2AP Handover Report
Increase
WrongCellRlfAfterHoVoice
counter when meet the condition
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Appendix B Call Flow
Figure 23. Collection Time for PingpongHandoverVoice
Serving
Cell
UE
Target Cell
Other Cell
RRC_CONNECTED (Voice call)
Measurement Report
Handover Preparation
RRC Connection Reconfiguration
(mobilityControlInfo)
RRC Connection Reconfiguration Complete
RRC_CONNECTED
Increase
PingpongHandoverVoice
counter when meet the condition
(using UE history information)
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Appendix B Call Flow
Inter RAT MRO (UTRAN)
Figure 24. Collection Time for UtranTooEarlyHo
UE
eNB
MME
SGSN
RNC
UE Active in LTE
Measurement Report
(Event B2, Inter-RAT HO)
Handover Required
(Source to Target Transparent container/
IRAT Measurement Configuration)
Forward Relocation Request
(IRAT Measurement Configuration)
Relocation Request
(IRAT Measurement Configuration)
Relocation Request Acknowledge
Forward Relocation Response
Handover Command
Mobility From EUTRAN Command
HO Complete
UE Active in Target RAT
UE Context Release
Configures IRAT Measurement Configuration
UE measures
EUTRAN Cells
IRAT Measurement Reporting
Judges whether to send
HO Report or not
MME Direct Information Transfer
(SON Transfer Request/HO Reporting)
RAN Information Relay
(BSS Container)
Direct Information Transfer
(SON Transfer Request/HO Reporting)
eNB Direct Information Transfer
(SON Transfer Response/HO Reporting)
Increases
UtranTooEarlyHo
counter
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
RAN Information Relay
(BSS Container)
Direct Information Transfer
(SON Transfer Response/HO Reporting)
26
Confidential
Appendix B Call Flow
Figure 25. Collection Time for UtranPingpongHO
UE
eNB #2
eNB #1
MME
UTRAN
Handover Request
Forward Relocation Request
Handover Request Acknowledge
Forward Relocation Response
Handover Notify
Forward Relocation Complete Notification
E-UTRAN Access Procedure
RRC Connection Reconfiguration Complete
Handover Report
1
UtranPingpongHo
1 UtranPingpongHo
Figure 26. Collection Time for UtranTooEarlyHoAfterConnFail/UtranTooLateHoAfterConnFail
UE
eNB #2
eNB #1
MME
UTRAN
Inter RAT Handover Success from UTRAN to E-UTRAN
UE re-connected to UTRAN cell after Radio Link Failure from E-UTRAN cell
UE moved to E-UTRAN sooner or later during 1) Connection Establishment or 2) Inter RAT Handover
UE Information Request
UE Information Response
RLF Indication
UE Information Request
UE Information Response
- UtranTooEarlyHoAfterConnFail 1
- UtranTooLateHoAfterConnFail
eNB Direct Information Transfer
RIM Information Request
MME Direct Information Transfer
RIM Information
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
27
Confidential
Appendix B Call Flow
Inter RAT MRO (GERAN)
Figure 27. Collection Time for GeranTooEarlyHo
UE
eNB
MME
SGSN
BSS
UE Active in LTE
Measurement Report
(Event B2, Inter-RAT HO)
Handover Required
(Source to Target Transparent container/
IRAT Measurement Configuration)
Forward Relocation Request
(IRAT Measurement Configuration)
PS Handover Request
(IRAT Measurement Configuration)
PS Handover Request Acknowledge
Forward Relocation Response
Handover Command
Mobility From EUTRAN Command
HO Complete
UE Active in Target RAT
UE Context Release
Configures IRAT Measurement Configuration
UE measures
EUTRAN Cells
IRAT Measurement Reporting
Judges whether to send
HO Report or not
MME Direct Information Transfer
(SON Transfer Request/HO Reporting)
RAN Information Relay
(BSS Container)
Direct Information Transfer
(SON Transfer Request/HO Reporting)
eNB Direct Information Transfer
(SON Transfer Response/HO Reporting)
Increases
GeranTooEarlyHo
counter
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
RAN Information Relay
(BSS Container)
Direct Information Transfer
(SON Transfer Response/HO Reporting)
28
Confidential
Appendix B Call Flow
VoLTE
VoLTE Handover
Figure 28. Collection time for VoLTE Intra handover
Target
Cell
Source Cell
UE
Measurement Report
1
Target Cell Perparation
2
VoLTE_IntraEnbPrepSucc
VoLTE_IntraEnbAtt
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
3
VoLTE_IntraEnbSucc
Figure 29. Collection time for VoLTE X2 handover
UE
Source eNB
Target eNB
MME
Measurement Report
HO Decision
Handover Required
VoLTE_InterX2OutAtt 1
VoLTE_InterX2OutPrepSucc
Handover Request
Acknowledge
2
Rrc Connection
Reconfiguration
Rrc Connection Reconfiguration Complete
Path Switch Request
VoLTE_InterX2OutSucc
3
UE Context Release
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Path Switch Request
Acknowledge
29
Confidential
Appendix B Call Flow
Figure 30. Collection time for VoLTE S1 handover
UE
Source eNB
Target eNB
MME
Measurement Report
HO Decision
VoLTE_InterS1OutAtt
Handover Required
1
Handover Request
Handover Request Acknowledge
Handover Command
VoLTE_InterS1OutPrepSucc 2
Rrc Connection
Reconfiguration
Rrc Connection Reconfiguration Complete
Tracking Area Update Procedure (NAS)
UE Context Release Command
VoLTE_InterS1OutSucc
UE Context Release Complete
3
VoLTE Handover time
Figure 31. Collection time for VoLTE intra handover time
UE
eNB
UE Including QCI #1 moves to Intra eNB Cell
Measurement Report
HO Decision
Target Cell Preparation
Rrc Connection Reconfiguration
VoLTE Intra Ho Time
Rrc Connection Reconfiguration Complete
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
30
Confidential
Appendix B Call Flow
Figure 32. Collection time for VoLTE X2 handover time
UE
Source eNB
Target eNB
UE Including QCI #1 moves to inter eNB Cell
Measurement Report
HO Decision
Handover Required
Handover Request
Acknowledge
Rrc Connection
Reconfiguration
VoLTE X2 Ho Time
Rrc Connection Reconfiguration Complete
Figure 33. Collection time for VoLTE S1 handover time
UE
Source eNB
Target eNB
MME
UE Including QCI #1 moves to inter MME Cell
Measurement Report
HO Decision
Handover Required
Handover Request
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Handover Command
VoLTE S1 Ho Time
Rrc Connection Reconfiguration Complete
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
31
Confidential
Appendix B Call Flow
VoLTE Quality Defect
Figure 34. Collection time for Downlink VoLTE quality defect
UE
eNB
MME
S/GW
UE CONNECTED
Downlink RTP Packet Receive By QCI #1 Bearer
Delayed RTP packet count
- VoLTEDLQualityDefect
Figure 35. Collection time for Uplink VoLTE quality defect
UE
eNB
MME
S/GW
UE CONNECTED
Uplink RTP Packet
Receive By QCI #1
Delayed RTP packet count
- VoLTEULQualityDefect
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
32
Confidential
Appendix B Call Flow
GTP
GTP Forward Traffic
Figure 36. Collection Time for GTP Forward Traffic
UE
eNB
MME
S/GW
RRC_CONNECTED
Uplink DRB Packet Send
- CntGtpULEnbS1Nor
- ByteGtpULEnbS1Nor
Downlink DRB Packet Receive
- CntGtpDLEnbS1Nor
- ByteGtpDLEnbS1Nor
Figure 37. Collection Time for GTP Forward Traffic
UE
Source eNB
S/GW
Target eNB
RRC_CONNECTED
Forward Traffic Send
- CntGtpULEnbS1Fw
- CntGtpULEnbIRatUtransS1Fw
- CntGtpULEnbIRatGeranS1Fw
- CntGtpULEnblRatCdma2000HrpdS1Fw
- ByteGtpULEnbS1Fw
- ByteGtpULEnblRatUtransS1Fw
- ByteGtpULEnblratGeranS1Fw
- ByteGtpULEnbSlRatCdma2000HrpdS1Fw
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Forward Traffic Receive
- CntGtpDLEnbS1Fw
- CntGtpDLEnbIRatUtransS1Fw
- CntGtpDLEnbIRatGeranS1Fw
- CntGtpDLEnblRatCdma2000HrpdS1Fw
- ByteGtpDLEnbS1Fw
- ByteGtpDLEnblRatUtransS1Fw
- ByteGtpDLEnblratGeranS1Fw
- ByteGtpDLEnbSlRatCdma2000HrpdS1Fw
33
Confidential
Appendix B Call Flow
Figure 38. Collection Time for GTP Forward Traffic
UE
Source eNB
Target eNB
RRC_CONNECTED
Forward Traffic Send
- CntGtpULEnbX2Fw
- CntGtpULEnbIRatUtransX2Fw
- CntGtpULEnbIRatGeranX2Fw
- CntGtpULEnblRatCdma2000HrpdX2Fw
- ByteGtpULEnbX2Fw
- ByteGtpULEnblRatUtransX2Fw
- ByteGtpULEnblratGeranX2Fw
- ByteGtpULEnbSlRatCdma2000HrpdX2Fw
Forward Traffic Receive
- CntGtpDLEnbX2Fw
- CntGtpDLEnbIRatUtransX2Fw
- CntGtpDLEnbIRatGeranX2Fw
- CntGtpDLEnblRatCdma2000HrpdX2Fw
- ByteGtpDLEnbX2Fw
- ByteGtpDLEnblRatUtransX2Fw
- ByteGtpDLEnblratGeranX2Fw
- ByteGtpDLEnbSlRatCdma2000HrpdX2Fw
GTP Sequence Number per eNB
Figure 39. Collection Time for GTP Sequence Number per eNB
UE
eNB
MME
S/GW
RRC_CONNECTED
Downlink DRB Packet Receive
- GtpSnEnbDLCnt
(if loss or oss packet occurs)
- GtpSnEnbPeakLoss
- GtpSnEnbOos
GTP Sequence Number per QCI
Figure 40. Collection Time for GTP Sequence Number per QCI
UE
eNB
MME
S/GW
RRC_CONNECTED
Downlink DRB Packet Receive
(if loss or oss packet occurs)
- GtpSnQciPeakLoss
- GtpSnQciOos
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
34
Confidential
Appendix B Call Flow
SRB
Cell PDCP SDU Bit Rate
Figure 41. Collection Time for PdcpSduBitrateDLTot
UE
eNB
MME
S/GW
Downlink SRB Packet Send
- PdcpSduBitrateDLTot
Downlink SRB Packet Receive
Figure 42. Collection Time for PdcpSduBitrateULTot
UE
eNB
MME
S/GW
Uplink SRB Packet Receive
- PdcpSduBitrateULTot
Uplink SRB Packet Send
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
35
Confidential
Appendix B Call Flow
DRB
Packet Drop Rate
Figure 43. Collection Time for PdcpSduDropRateDL
UE
eNB
MME
S/GW
RRC_CONNECTED
Downlink DRB Packet Send Fail
- PdcpSduDropRateDL
Downlink DRB Packet Receive
Packet Loss Rate
Figure 44. Collection Time for PdcpSduLossRateUL, PdcpSduLossUlNum
UE
eNB
MME
S/GW
RRC_CONNECTED
Uplink DRB Packet Receive
Uplink DRB Packet Send
Packet Loss
Uplink DRB Packet Receive
- PdcpSduLossRateUL
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Uplink DRB Packet Send
36
Confidential
Appendix B Call Flow
Packet Statistics
PDCP Packet
Figure 45. Collection Time for PacketULByte
UE
eNB
MME
S/GW
RRC_CONNECTED
Uplink DRB Packet Send
- PacketULByte
- PacketULCnt
Uplink DRB Packet Receive
Figure 46. Collection Time for EnbQciDLByte
UE
eNB
MME
S/GW
RRC_CONNECTED
Downlink DRB Packet Send
- EnbQciDLByte
- EnbQciDLCnt
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Downlink DRB Packet Receive
37
Confidential
Appendix B Call Flow
S1SIG
UE-associated logical S1 Connection Establishment
Figure 47. Collection Time for S1SIG (1)
UE
eNB
MME
S/GW
MME
S/GW
MME
S/GW
RRC_IDLE
Initial UE Message
1
Attempt
2
Success
Initial Context Setup Request
RRC_CONNECTED
Figure 48. Collection Time for S1SIG (2)
UE
eNB
RRC_IDLE
Initial UE Message
1
Attempt
2
Success
Downlink NAS Transport
RRC_CONNECTED
Figure 49. Collection Time for S1SIG (3)
UE
eNB
RRC_IDLE
Initial UE Message
1
Attempt
2
Success
UE Context Release Command
RRC_CONNECTED
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
38
Confidential
Appendix B Call Flow
Figure 50. Collection Time for S1ConnEstabFail_S1apSigTo
UE
eNB
MME
S/GW
RRC_CONNECTED
Attempt
1
Initial UE Message
Initial Context Setup Request Timeout
2
Failure
- S1ConnEstabFail_S1apSigTo
RRC_CONNECTED
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
39
Confidential
Appendix B Call Flow
Paging
Paging
Figure 51. Collection Time for PAGING
UE
eNB
MME
S/GW
RRC_IDLE
Paging Request
Paging
Paging
1
Attempt
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
40
Confidential
Appendix B Call Flow
Overload Protection
Denied Call by Overload Protection
Figure 52. Denied Call Count for Overload Protection
eNB
RRC Connection Request
INITIATION
- highPriorityAccessCount = 0,
- moSighnalingcount = 0,
- moDataCount = 0,
- delayTolerantAccessCount = 0
ATTACH
Timer(timOverloadProtect_id)
RRCConnectionRequest
Y
EXECUTE
RRCConnectionRequest
overloadProtectCtrl!= noUse?
N
Y
Y
gNormalCallRcvCnt >
thresholdForNormalCall ?
COLLECT
Statistics for DenyForHighPriorityAccess
highPriorityAccess?
N
N
Y
COLLECT
Statistics for DenyFormoSignaling
moSignaling?
N
Y
COLLECT
Statistics for
DenyFormoData
moData?
N
Y
COLLECT
Statistics for
DenyForDelayTolerantAccess
delayTolerantAccess?
N
Y
overloadProtectCtrl ==
protectPerEstablishCause
N
Y
Y
highPriorityAccess?
gHighPriorityAccessCount++
gHighPriorityAccessCount >
thresholdForHighPriorityAccessRate?
gMoSignalingCount++
gMoSignalingCount >
thresholdFormoSignalingRate?
gMoDataCount++
gMoDataCount > thresholdFormoDataRate?
gDelayTolerantAccessCount++
gDelayTolerantAccessCount >
thresholdForDelayTolerantAccessRate?
N
COLLECT
Statistics for DenyForHighPriorityAccess
N
Y
Y
moSignaling?
N
COLLECT
Statistics for DenyFormoSignaling
N
Y
Y
moData?
N
COLLECT
Statistics for DenyForDelayTolerantAccess
N
Y
Y
delayTolerantAccess?
N
COLLECT
Statistics for
DenyFormoData
N
EXECUTE
RRCConnectionRequest
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
41
Confidential
Appendix B Call Flow
RRC
Call Drop
Figure 53. Collection Time for CallDrop_EccbDspAuditRlcMacCallRelease
UE
eNB
MME
S/GW
RRC_CONNECTED
Mismatch of UE information in the
execution of audit between the ECCB
and RLC/MAC
CallDrop_EccbDspAuditRlcMacCallRelease
1
RRC_IDLE
Figure 54. Collection Time for CallDrop_EccbRcvResetRequestFromEcmb
UE
eNB
MME
S/GW
RRC_CONNECTED
ECMB reset
1
CallDrop_EccbRcvResetRequestFromEcmb
RRC_IDLE
Figure 55. Collection Time for CallDrop_EccbRcvCellReleaseIndFromEcmb
UE
eNB
MME
S/GW
RRC_CONNECTED
Cell disabled
1
CallDrop_EccbRcvResetRequestFromEcmb
RRC_IDLE
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
42
Confidential
Appendix B Call Flow
Figure 56. Collection Time for CallDrop_EccbRadioLinkFailure
eNB
ECCB
MAC
UE
MME
S/GW
RRC_CONNECTED
HARQ ACK
X
Fail Message
Timer InternalReestablishmentTimeToWait
RRCConnectionReestablishmentRequest
X
1
CallDrop_EccbRadioLinkFailure
RRC_IDLE
Figure 57. Collection Time for CallDrop_EccbDspAuditMacCallRelease
UE
eNB
MME
S/GW
RRC_CONNECTED
A mismatch of UE information
occurred in the execution of audit
between the ECCB and MAC
1
CallDrop_EccbDspAuditMacCallRelease
RRC_IDLE
Figure 58. Collection Time for CallDrop_EccbArqMaxReTransmission
eNB
ECCB
RLC
UE
MME
S/GW
RRC_CONNECTED
ARQ ACK
X
Fail Message
RRCConnectionReestablishmentRequest
X
Timer InternalReestablishmentTimeToWait
1
CallDrop_EccbArqMaxReTransmission
RRC_IDLE
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
43
Confidential
Appendix B Call Flow
Figure 59. Collection Time for CallDrop_EccbDspAuditRlcCallRelease
UE
eNB
MME
S/GW
RRC_CONNECTED
A mismatch of UE information
occurred in the execution of audit
between the ECCB and RLC
CallDrop_EccbDspAuditRlcCallRelease
1
RRC_IDLE
Figure 60. Collection Time for CallDrop_EccbTmoutRrcConnectionReconfig
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReconfiguration
Timer RRCConnectionReconfiguration
RRCConnectionReconfigurationComplete
X
1
CallDrop_EccbTmoutRrcConnectionReconfig
RRC_IDLE
Figure 61. Collection Time for CallDrop_EccbTmoutRrcConnectionReestablish
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
RRCConnectionReestablishment
Timer RRCConnectionReEstablish
RRCConnectionReestablishmentComplete
X
1
CallDrop_EccbTmoutRrcConnectionReestablish
RRC_IDLE
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
44
Confidential
Appendix B Call Flow
Figure 62. Collection Time for CallDrop_EccbS1SctpOutOfService (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
S1 AP Link is Out of Service Status
X
1
CallDrop_EccbS1SctpOutOfService
RRC_IDLE
Figure 63. Collection Time for CallDrop_EccbS1SctpOutOfService (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
SCTB reset
1
CallDrop_EccbS1SctpOutOfService
RRC_IDLE
RRC Connection Number
Figure 64. Collection Time for RRC Connection Number
UE
Target eNB
RRCConnectionRequest
Case 1.
Case 2.
RRCConnectionSetup
1
1
Source eNB
MME
S/GW
ConnNoAvg
ConnNoMax
ConnNoTot
ConnNoCnt
HANDOVER REQUEST
ConnNoAvg
ConnNoMax HANDOVER REQUEST ACKNOWLEDGE
ConnNoTot
ConnNoCnt
HANDOVER REQUEST
Case 3.
1
ConnNoAvg
ConnNoMax
ConnNoTot
ConnNoCnt
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
HANDOVER REQUEST ACKNOWLEDGE
45
Confidential
Appendix B Call Flow
Figure 65. Collection Time for Release Call Holding Time
UE
Source eNB
Target eNB
MME
S/GW
RRCConnectionRequest
RRCConnectionSetup
RRCConnectionSetupComplete
•
•
•
ReleaseCallHoldingTimeAvg
ReleaseCallHoldingTimeTot
ReleaseCallHoldingTimeCnt
1
RRCConnectionRelease
X2 Handover Success
•
•
•
ReleaseCallHoldingTimeAvg
ReleaseCallHoldingTimeTot
ReleaseCallHoldingTimeCnt
1
RRCConnectionRelease
S1 Handover Success
•
•
•
ReleaseCallHoldingTimeAvg
ReleaseCallHoldingTimeTot
ReleaseCallHoldingTimeCnt
1
RRCConnectionRelease
Inter-RAT Handover Success
•
•
•
ReleaseCallHoldingTimeAvg
ReleaseCallHoldingTimeTot
ReleaseCallHoldingTimeCnt
1
RRCConnectionRelease
RRC Connection Establishment
Figure 66. Collection Time for RRC Connection Establishment
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
2
ConnEstabSucc
RRCConnectionSetup
RRCConnectionSetupComplete
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
46
Confidential
Appendix B Call Flow
Figure 67. Collection Time for ConnEstabFail_CpCcTo
eNB
UE
ECCB
MAC/RLC/PDCP
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
Timer RRCConnectionSetup
Success Message
X
2
Failure
- ConnEstabFail_CpCcTo
Figure 68. Collection Time for ConnEstabFail_CpCcFail (1)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
ECMB reset
Failure
- ConnEstabFail_CpCcFail
2
Figure 69. Collection Time for ConnEstabFail_CpCcFail (2)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
Cell disabled
2
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnEstabFail_CpCcFail
47
Confidential
Appendix B Call Flow
Figure 70. Collection Time for ConnEstabFail_CpCcFail (3)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
Mismatch of UE information in the
execution of audit between the ECCB
and RLC/MAC
2
Failure
- ConnEstabFail_CpCcFail
Figure 71. Collection Time for ConnEstabFail_CpCcFail (4)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
RRCConnectionSetupComplete
Available MME doesn’t exist
2
Failure
- ConnEstabFail_CpCcFail
Figure 72. Collection Time for ConnEstabFail_UpMacFail (1)
eNB
UE
MAC
ECCB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
2
Failure
- ConnEstabFail_UpMacFail
RRCConnectionSetup
Fail Message
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
48
Confidential
Appendix B Call Flow
Figure 73. Collection Time for ConnEstabFail_UpMacFail (2)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
A Mismatch of UE information
occurred in the execution of audit
between the ECCB and MAC
2
Failure
- ConnEstabFail_UpMacFail
Figure 74. Collection Time for ConnEstabFail_UpPdcpFail
eNB
UE
ECCB
PDCP
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
2
Failure
- ConnEstabFail_UpPdcpFail
RRCConnectionSetup
Fail Message
Figure 75. Collection Time for ConnEstabFail_UpRlcFail (1)
eNB
UE
RLC
ECCB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
2
Failure
- ConnEstabFail_UpRlcFail
RRCConnectionSetup
Fail Message
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
49
Confidential
Appendix B Call Flow
Figure 76. Collection Time for ConnEstabFail_UpRlcFail (2)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
A Mismatch of UE information
occurred in the execution of audit
between the ECCB and RLC
2
Failure
- ConnEstabFail_UpRlcFail
Figure 77. Collection Time for ConnEstabFail_RrcSigTo
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
Timer RRCConnectionSetup
RRCConnectionSetupComplete
X
2
Failure
- ConnEstabFail_RrcSigTo
Figure 78. Collection Time for ConnEstabFail_S1apLinkFail (1)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
S1 AP Link is Out of Service Status
X
Failure
2
- ConnEstabFail_S1apLinkFail
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
50
Confidential
Appendix B Call Flow
Figure 79. Collection Time for ConnEstabFail_S1apLinkFail (2)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
SCTB reset
2
Failure
- ConnEstabFail_S1apLinkFail
Figure 80. Collection Time for ConnEstabFail_S1apSigFail
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
RRCConnectionSetup
RESET
2
Failure
- ConnEstabFail_S1apSigFail
Figure 81. Collection Time for ConnEstabReject_CpCcFail (1)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
Cell disabled
RRCConnectionReject
2
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnEstabReject_CpCcFail
51
Confidential
Appendix B Call Flow
Figure 82. Collection Time for ConnEstabReject_CpCcFail (2)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
Internal resource
allocation Failure
RRCConnectionReject
2
Failure
- ConnEstabReject_CpCcFail
Figure 83. Collection Time for ConnEstabReject_CpCcFail (3)
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
Available MME doesn’t exist
RRCConnectionReject
2
Failure
- ConnEstabReject_CpCcFail
Figure 84. Collection Time for ConnEstabReject_CpCapaCacFail
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
1
ConnEstabAtt
CAC based on Call Count per eNB Fail
or
CAC based on Call Count per Cell Fail
RRCConnectionReject
2
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnEstabReject_CpCapaCacFail
52
Confidential
Appendix B Call Flow
Figure 85. Collection Time for ConnEstabReject_S1apMmeOvld
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
ConnEstabAtt
1
MME OverLoad
RRCConnectionReject
2
Failure
- ConnEstabReject_S1apMmeOvld
RRC Connection Reconfiguration
Figure 86. Collection Time for ConnReconfigAtt
UE
eNB
MME
S/GW
MME
S/GW
MME
S/GW
MME
S/GW
RRC_CONNECTED
RRCConnectionReconfiguration
1
ConnReconfigAtt
Figure 87. Collection Time for ConnReconfigSucc
UE
eNB
RRCConnectionReconfiguration
Complete
1
ConnReconfigSucc
Figure 88. Collection Time for SCellAddCount
UE
eNB
RRC_CONNECTED
RRCConnectionReconfiguration
(with sCellToAddModList)
1
SCellAddCount
Figure 89. Collection Time for SCellReleaseCount
UE
eNB
RRC_CONNECTED
RRCConnectionReconfiguration
(with sCellToReleaseList)
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
SCellReleaseCount
53
Confidential
Appendix B Call Flow
RRC Connection Re-establishment
Figure 90. Collection Time for RRC Connection Re-Establishment
UE
eNB
MME
S/GW
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
RRCConnectionReestablishment
RRCConnectionReestablishment
Complete
1
ConnReEstabAtt
2
ConnReEstabSucc
RRC_CONNECTED
Figure 91. Collection Time for ConnReEstabFail_CpCcFail (1)
UE
eNB
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
ECMB reset
2
Failure
- ConnReEstabFail_CpCcFail
Figure 92. Collection Time for ConnReEstabFail_CpCcFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
Cell disabled
2
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnReEstabFail_CpCcFail
54
Confidential
Appendix B Call Flow
Figure 93. Collection Time for ConnReEstabFail_CpCcFail (3)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
Mismatch of UE information in the
execution of audit between the ECCB
and RLC/MAC
2
Failure
- ConnReEstabFail_CpCcFail
Figure 94. Collection Time for ConnReEstabFail_CpCcFail (4)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
Internal resource allocation Failure
2
Failure
- ConnReEstabFail_CpCcFail
Figure 95. Collection Time for ConnReEstabFail_UpMacFail (1)
eNB
UE
ECCB
MAC
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
2
Failure
- ConnReEstabFail_UpMacFail
RRCConnectionReestablishment
Fail Message
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
55
Confidential
Appendix B Call Flow
Figure 96. Collection Time for ConnReEstabFail_UpMacFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
A mismatch of UE information
occurred in the execution of audit
between the ECCB and MAC
2
Failure
- ConnReEstabFail_UpMacFail
Figure 97. Collection Time for ConnReEstabFail_UpPdcpFail
eNB
UE
ECCB
PDCP
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
2
Failure
- ConnReEstabFail_UpPdcpFail
RRCConnectionReestablishment
Fail Message
Figure 98. Collection Time for ConnReEstabFail_UpRlcFail (1)
eNB
UE
ECCB
RLC
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
2
Failure
- ConnReEstabFail_UpRlcFail
RRCConnectionReestablishment
Fail Message
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
56
Confidential
Appendix B Call Flow
Figure 99. Collection Time for ConnReEstabFail_UpRlcFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
A mismatch of UE information
occurred in the execution of audit
between the ECCB and RLC
2
Failure
- ConnReEstabFail_UpRlcFail
Figure 100. Collection Time for ConnReEstabFail_RrcSigTo (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
Timer RRCConnectionReEstablish
RRCConnectionReestablishmentComplete
2
X
Failure
- ConnReEstabFail_RrcSigTo
Figure 101. Collection Time for ConnReEstabFail_RrcSigTo (2)
eNB
UE
MAC/RLC/PDCP
ECCB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
Timer RRCConnectionReEstablish
Success Message
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
X
2
Failure
- ConnReEstabFail_RrcSigTo
57
Confidential
Appendix B Call Flow
Figure 102. Collection Time for ConnReEstabFail_S1apLinkFail (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
S1 AP Link is Out of Service Status
X
2 Failure
- ConnReEstabFail_S1apLinkFail
Figure 103. Collection Time for ConnReEstabFail_S1apLinkFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
SCTB reset
2
Failure
- ConnReEstabFail_S1apLinkFail
Figure 104. Collection Time for ConnReEstabFail_S1apSigFail (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
S1AP UE CONTEXT RELEASE COMMAND
2
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnReEstabFail_S1apSigFail
58
Confidential
Appendix B Call Flow
Figure 105. Collection Time for ConnReEstabFail_S1apSigFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
RRCConnectionReestablishment
RESET
2
Failure
- ConnReEstabFail_S1apSigFail
Figure 106. Collection Time for ConnReEstabReject_CpCcFail (1)
UE
eNB
MME
RRCConnectionReestablishmentRequest
1
S/GW
ConnReEstabAtt
No context information about
the existence of the UE
RRCConnectionReestablishmentReject
2
Failure
- ConnReEstabReject_CpCcFail
Figure 107. Collection Time for ConnReEstabReject_CpCcFail (2)
UE
eNB
MME
S/GW
Attach Procedure is not completed
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
2
Failure
- ConnReEstabReject_CpCcFail
RRCConnectionReestablishmentReject
Figure 108. Collection Time for ConnReEstabReject_CpCcFail (3)
UE
Target eNB
MME
S/GW
SN STATUS TRANSFER message is yet to be received from the source eNB
or MME STATUS TRANSFER message is yet to be received from the MME
when inter-eNB handvoer operation is perfomed.
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
2
Failure
- ConnReEstabReject_CpCcFail
RRCConnectionReestablishmentReject
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
59
Confidential
Appendix B Call Flow
Figure 109. Collection Time for ConnReEstabReject_CpCcFail (4)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
Cell Barred
RRCConnectionReestablishmentReject
2
Failure
- ConnReEstabReject_CpCcFail
Figure 110. Collection Time for ConnReEstabReject_CpCcFail (5)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
Cell Locked or Shutting Down
RRCConnectionReestablishmentReject
2
Failure
- ConnReEstabReject_CpCcFail
Figure 111. Collection Time for ConnReEstabReject_CpCcFail (6)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
Pre-emption Fail
RRCConnectionReestablishmentReject
2
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnReEstabReject_CpCcFail
60
Confidential
Appendix B Call Flow
Figure 112. Collection Time for ConnReEstabReject_CpCapaCacFail
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
1
ConnReEstabAtt
CAC based on Call Count per Cell Fail
or
CAC based on DRB Count per Cell Fail
RRCConnectionReestablishmentReject
2
Failure
- ConnReEstabReject_CoCapaCacFail
Figure 113. Collection Time for ConnReEstabReject_CpQosCacFail
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest 1
ConnReEstabAtt
CAC based on QoS Fail
RRCConnectionReestablishmentReject
2
Failure
- ConnReEstabReject_CpQosCacFail
RRC Connection Release
Figure 114. Collection Time for ConnRelease_CpCcNormal
UE
eNB
MME
S/GW
RRC_CONNECTED
RRC connection release
by normal operation
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
ConnRelease_CpCcNormal
61
Confidential
Appendix B Call Flow
Figure 115. Collection Time for ConnRelease_CpCcTo
eNB
UE
MAC/RLC/
PDCP/GTP
ECCB
MME
S/GW
RRC_CONNECTED
Success Message
X
RRC connection release by
internal message timeout
RRCConnectionRelease
1
Failure
- ConnRelease_CpCcTo
Figure 116. Collection Time for ConnRelease_CpCcFail (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
ECMB reset
RRCConnectionRelease
1
Failure
- ConnRelease_CpCcFail
Figure 117. Collection Time for ConnRelease_CpCcFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
Cell disabled
RRCConnectionRelease
1
Failure
- ConnRelease_CpCcFail
Figure 118. Collection Time for ConnRelease_CpCcFail (3)
UE
eNB
MME
S/GW
RRC_CONNECTED
Mismatch of UE information in the
execution of audit between the ECCB
and RLC/MAC
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_CpCcFail
62
Confidential
Appendix B Call Flow
Figure 119. Collection Time for ConnRelease_CpCcFail (4)
UE
eNB
MME
S/GW
RRC_CONNECTED
Internal resource allocation Failure
RRCConnectionRelease
1
Failure
- ConnRelease_CpCcFail
Figure 120. Collection Time for ConnRelease_UpGtpFail
eNB
UE
ECCB
GTP
MME
S/GW
RRC_CONNECTED
Fail Message
RRCConnectionRelease
1
Failure
- ConnRelease_UpGtpFail
Figure 121. Collection Time for ConnRelease_UpMacFail (1)
eNB
UE
ECCB
MAC
MME
S/GW
RRC_CONNECTED
Fail Message
RRCConnectionRelease
1
Failure
- ConnRelease_UpMacFail
Figure 122. Collection Time for ConnRelease_UpMacFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
A mismatch of UE information
occurred in the execution of audit
between the ECCB and MAC
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_UpMacFail
63
Confidential
Appendix B Call Flow
Figure 123. Collection Time for ConnRelease_UpMacUEInact
UE
eNB
MME
S/GW
RRC_CONNECTED
RRC connection release by
Inactivity Timeout
RRCConnectionRelease
1 Failure
- ConnRelease_UpMacUEInact
Figure 124. Collection Time for ConnRelease_UpPdcpFail
eNB
UE
ECCB
PDCP
MME
S/GW
RRC_CONNECTED
Fail Message
RRCConnectionRelease
1
Failure
- ConnRelease_UpPdcpFail
Figure 125. Collection Time for ConnRelease_UpRlcFail (1)
eNB
UE
ECCB
RLC
MME
S/GW
RRC_CONNECTED
Fail Message
RRCConnectionRelease
1
Failure
- ConnRelease_UpRlcFail
Figure 126. Collection Time for ConnRelease_UpRlcFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
A mismatch of UE information
occurred in the execution of audit
between the ECCB and RLC
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_UpRlcFail
64
Confidential
Appendix B Call Flow
Figure 127. Collection Time for ConnRelease_RrcHcTo
UE
eNB
MME
S/GW
RRC_CONNECTED
MeasurementReport
HO Decision
(Intra-eNB Handover)
Target Cell
Handover Preparation
RRCConnectionReconfiguration
RRCConnectionReconfigurationComplete
X
RRCConnectionRelease
Timer IntraEnbHoComplete
1
Failure
- ConnRelease_RrcHcTo
Figure 128. Collection Time for ConnRelease_RrcSigFail (1)
UE
eNB
MME
S/GW
RRC connection establishement Procedure is completed
but Attach Procedure is not completed
RRCConnectionReestablishmentRequest
RRCConnectionReestablishmentReject
RRCConnectionRelease
1
Failure
- ConnRelease_RrcSigFail
Figure 129. Collection Time for ConnRelease_RrcSigFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionRequest
(with S-TMSI)
The call that have same S-TMSI
exists already.
so Delete the existing call
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_RrcSigFail
65
Confidential
Appendix B Call Flow
Figure 130. Collection Time for ConnRelease_RrcSigFail (3)
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionRequest
(with random value)
The call that have same random
value exists already.
so Delete the existing call
RRCConnectionRelease
1
Failure
- ConnRelease_RrcSigFail
Figure 131. Collection Time for ConnRelease_RrcSigTo
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReconfiguration
Case 1. RRCConnectionReconfigurationComplete
X
RRCConnectionRelease
Timer RRCConnectionReconfig
1
Failure
- ConnRelease_RrcSigTo
RRCConnectionReestablishmentRequest
RRCConnectionReestablishment
Case 2.
RRCConnectionReestablishmentComplete
X
RRCConnectionRelease
Timer RRCConnectionReEstablish
1
Failure
- ConnRelease_RrcSigTo
1
Failure
- ConnRelease_RrcSigTo
SecurityModeCommand
Case 3.
SecurityModeFailure
RRCConnectionRelease
SecurityModeCommand
Timer RRCSecurityModeCommand
SecurityModeComplete
X
Case 4.
RRCConnectionRelease
1
Failure
- ConnRelease_RrcSigTo
UECapabilityEnquiry
Case 5.
Timer RRCUeCapabilityEnquiry
UECapabilityInformation
X
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_RrcSigTo
66
Confidential
Appendix B Call Flow
Figure 132. Collection Time for ConnRelease_CpBhCacFail
UE
eNB
MME
S/GW
RRC_CONNECTED
CAC based on backhaul bandwidth Fail
RRCConnectionRelease
1
Failure
- ConnRelease_CpBhCacFail
Figure 133. Collection Time for ConnRelease_CpCapaCacFail
UE
eNB
MME
S/GW
RRC_CONNECTED
CAC based on Call Count per eNB Fail
or
CAC based on Call Count per Cell Fail
RRCConnectionRelease
1
Failure
- ConnRelease_CpCapaCacFail
Figure 134. Collection Time for ConnRelease_CpQosCacFail
UE
eNB
MME
S/GW
RRC_CONNECTED
CAC based on QoS Fail
RRCConnectionRelease
1
Failure
- ConnRelease_CpBhCacFail
Figure 135. Collection Time for ConnRelease_S1apCuFail
UE
eNB
MME
S/GW
RRC_CONNECTED
S1AP Message
RRC connection release by
S1AP message
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_S1apCuFail
67
Confidential
Appendix B Call Flow
Figure 136. Collection Time for ConnRelease_S1apLinkFail (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
S1AP Message
RRC connection release by
S1AP message
RRCConnectionRelease
1
Failure
- ConnRelease_S1apCuFail
Figure 137. Collection Time for ConnRelease_S1apLinkFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
SCTB reset
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_S1apLinkFail
68
Confidential
Appendix B Call Flow
Figure 138. Collection Time for ConnRelease_S1apRoTo (1)
UE
Source eNB
MME
S/GW
RRC_CONNECTED
MeasurementReport
HO Decision
(Intra LTE Handover)
HANDOVER REQUIRED
HANDOVER COMMAND
RRCConnectionReconfiguration
Timer S1RelocOverall
UE CONTEXT RELEASE COMMAND
X
RRCConnectionRelease
Failure
- ConnRelease_S1apRoTo
1
Figure 139. Collection Time for ConnRelease_S1apRoTo (2)
UE
Source eNB
MME
S/GW
RRC_CONNECTED
MeasurementReport
HO Decision
(Inter-RAT Handover:
UTRAN, GERAN)
HANDOVER REQUIRED
HANDOVER COMMAND
MobilityFromEUTRACommand
Timer S1RelocOverall
UE CONTEXT RELEASE COMMAND
X
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_S1apRoTo
69
Confidential
Appendix B Call Flow
Figure 140. Collection Time for ConnRelease_S1apRoTo (3)
UE
Source eNB
MME
S/GW
RRC_CONNECTED
HRPD Pre-Registration
MeasurementReport
HO Decision
(Inter-RAT Handover:
CDMA2000 HRPD)
HandoverFromEUTRAPreparationRequest
ULHandoverPreparationTransfer
UPLINK S1 CDMA2000 TUNNELING
DOWNLINK S1 CDMA2000 TUNNELING
MobilityFromEUTRACommand
Timer S1RelocOverall
UE CONTEXT RELEASE COMMAND
X
RRCConnectionRelease
1
Failure
- ConnRelease_S1apRoTo
Figure 141. Collection Time for ConnRelease_S1apSigFail (1)
UE
eNB
MME
S/GW
RRC_CONNECTED
UE CONTEXT RELEASE COMMAND
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_S1apSigFail
70
Confidential
Appendix B Call Flow
Figure 142. Collection Time for ConnRelease_S1apSigFail (2)
UE
eNB
MME
S/GW
RRC_CONNECTED
RESET
RRCConnectionRelease
1
Failure
- ConnRelease_S1apSigFail
Figure 143. Collection Time for ConnRelease_S1apSigFail (3)
UE
eNB
MME
S/GW
RRC_CONNECTED
INITIAL CONTEXT SETUP REQUEST
(with UE Radio Capability and UE Security Capabilities)
Integrity algorithm of UE is eia0 but Cipering
algorithm of UE is not eea0
RRCConnectionRelease
1
Failure
- ConnRelease_S1apSigFail
UE CONTEXT MODIFICATION REQUEST (with UE Security Capabilities)
Integrity algorithm of UE is eia0 but Cipering
algorithm of UE is not eea0
RRCConnectionRelease
1
Failure
- ConnRelease_S1apSigFail
UECapabilityInformation
Integrity algorithm of UE is eia0 but Cipering
algorithm of UE is not eea0
RRCConnectionRelease
1
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
Failure
- ConnRelease_S1apSigFail
71
Confidential
Appendix B Call Flow
Figure 144. Collection Time for ConnRelease_S1apSigTo
UE
eNB
MME
S/GW
RRC_CONNECTED
INITIAL CONTEXT SETUP REQUEST
Timer S1InitialContextSetup
INITIAL CONTEXT SETUP RESPONSE
X
RRCConnectionRelease
1
Failure
- ConnRelease_RrcSigTo
Figure 145. Collection Time for ConnRelease_X2apCuFail
UE
Source eNB
Target eNB
RRC_CONNECTED
X2AP Message
RRC connection release by
X2AP message
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_X2apCuFail
72
Confidential
Appendix B Call Flow
Figure 146. Collection Time for ConnRelease_X2apRoTo
UE
Source eNB
Target eNB
RRC_CONNECTED
MeasurementReport
HO Decision
(Inter X2 Handover)
HANDOVER REQUEST
HANDOVER REQUEST ACKNOWLEDGE
RRCConnectionReconfiguration
Timer X2RelocOverall
UE CONTEXT RELEASE
X
RRCConnectionRelease
Failure
- ConnRelease_X2apRoTo
1
Figure 147. Collection Time for ConnRelease_X2apSigFail (1)
UE
Source eNB
Target eNB
RRC_CONNECTED
MeasurementReport
HO Decision
(Inter X2 Handover)
HANDOVER REQUEST
HANDOVER REQUEST ACKNOWLEDGE
RRCConnectionReconfiguration
RESET REQUEST
RRCConnectionRelease
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
1
Failure
- ConnRelease_X2apSigFail
73
Confidential
Appendix B Call Flow
Figure 148. Collection Time for ConnRelease_X2apSigFail (2)
Source eNB
UE
ECCB
CSAB
Target eNB
RRC_CONNECTED
MeasurementReport
HO Decision
(Inter X2 Handover)
HANDOVER REQUEST
HANDOVER REQUEST ACKNOWLEDGE
RRCConnectionReconfiguration
X2ResetRequest
RRCConnectionRelease
1
Failure
- ConnRelease_X2apSigFail
RRC Connection Re-establishment Time
Figure 149. Collection Time for Re-establishment Time
UE
eNB
MME
S/GW
RRC_CONNECTED
RRCConnectionReestablishmentRequest
RRCConnectionReestablishment
1
ConnReEstabTimeAvg
ConnReEstaabTimeMax
ConnReEstabTimeTot
ConnReEstabTimeCnt
RRCConnectionReestablishmentComplete
RRC_CONNECTED
The RRC Connection setup time is a time taken from receiving the RRC
Connection Request message up to receive in the RRC Connection Setup
Complete message.
The eNB calculates and reports to the LSM the average and maximum values for
the collection period (in milliseconds).
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
74
Confidential
Appendix B Call Flow
RRC Connection Setup Time
Figure 150. Collection Time for RRC Connection Setup Time
UE
eNB
MME
S/GW
RRC_IDLE
RRCConnectionRequest
RRCConnectionSetup
1
ConnEstabTimeAvg
ConnEstaabTimeMax
ConnEstabTimeTot
ConnEstabTimeCnt
RRCConnectionSetupComplete
The RRC Connection setup time is taken from receiving the RRC Connection
Request message up to receiving the RRC Connection Setup Complete message.
The eNB calculates and reports to the LSM the average and maximum values for
the collection period (in milliseconds).
LTE eNB Counter Description for SLR 6.0.0 v3.0
Copyright © 2017, All Rights Reserved.
75
Confidential
Appendix B Call Flow
Load Balancing
Idle Load Balancing
Figure 151. Statistics for Idle LB
UE
eNB
RRC_CONNECTED
IDLE UE
DISTRIBUTION
COUNT
1. UECount
2. IdleLbCnt
3. IdleLbTargetEarfcnDL
RRCConnectionRelease
Load
Figure 152. Collection Time for Load
DSP
CSAB
ECCB
PrbUsage
.
.
.
PrbUsage
LTE eNB Counter Description for SLR 6.0.0 v3.0
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ActiveLbInd
1
LoadInd, MlbDuration
76
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Appendix B Call Flow
Load Histogram
Figure 153. Collection Time for Load Histogram
DSP
CSAB
PrbUsage
.
.
.
ECCB
1
LoadHistogram
ActiveLbInd
PrbUsage
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Appendix B Call Flow
Carrier Aggregation
Carrier Aggregation capable UEs (PCell)
Figure 154. Collection Time for CaCapaPCellUE (1) in Initial Attach case
UE
eNB
MME
Initial Context
Setup Request
1
CaCapaPCellUE
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Initial Context
Setup Response
Figure 155. Collection Time for CaCapaPCellUE (1) in X2 Handover case
UE
Source eNB
Target eNB
MME
UE moves to Inter eNB Cell
Measurement Report
Handover Request
RRC Connection
Reconfiguration
Handover Request
Acknowledge
1
CaCapaPCellUE
SN Status Transfer
RRC Connection Reconfiguration Complete
Path Switch Request
Path Switch Request
Acknowledge
UE Context Release
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Appendix B Call Flow
Figure 156. Collection Time for CaCapaPCellUE (1) in S1 Handover case
UE
Source eNB
Target eNB
MME
UE moves to Inter eNB Cell
Measurement Report
Handover Required
Handover Request
1
RRC Connection
Reconfiguration
CaCapaPCellUE
Handover Request
Acknowledge
Handover Command
eNB Status Transfer
MME Status Transfer
RRC Connection Reconfiguration Complete
Handover Notify
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Carrier Aggregation Message count for Addition-Release
Figure 157. Collection Time for Initial Attach
eNB
UE
MME
RRC Connection Establishment
Initial Context
Setup Request
SCellAddAtt 1
Scell Decision
2
- SCellAddFail_CaCapaCac
- SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
2
SCellAddFail_RrcSigTO
3
SCellAddSucc_RrcSig
4
CaUECapaEnquiryAdditionalSbc
5
CaUECapaInformationAdditionalSbc
Rrc Connection Reconfiguration
Rrc Connection
Reconfiguration Complete
Conditional
Conditional
UE Capability Enquiry
UE Capability Information
Scell Decision
SCellAddFail_CaCapaCac
6 SCellAddFail_CpCcFail
Rrc Connection Reconfiguration
SCellAddFail_CpRrmFail
7
Rrc Connection
Reconfiguration Complete
8
LTE eNB Counter Description for SLR 6.0.0 v3.0
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SCellAddAtt_AddSbcRrcSig
SCellAddSuc_AddSbcRrcSig
SCellAddFail_RrcSigTO
SCellRel_AddSbcRrcSig
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Appendix B Call Flow
Figure 158. Collection Time for Intra eNB Handover
Source Cell
UE
Measurement Report
(A3 or A5 event)
Target Cell
Target Cell Perparation
1
SCellAddAtt
Scell Decision
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
- SCellAddFail_CaCapaCac
2 - SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
2 SCellAddFail_RrcSigTO
3 SCellAddSucc_RrcSig
Conditional
Conditional
UE Capability Enquiry
4
CaUECapaEnquiryAdditionalSbc
5
CaUECapaInformationAdditionalSbc
UE Capability Information
Rrc Connection Reconfiguration
Scell Decision
SCellAddFail_CaCapaCac
6 SCellAddFail_CpCcFail
SCellAddFail_CpRrmFail
7
Rrc Connection
Reconfiguration Complete
8
LTE eNB Counter Description for SLR 6.0.0 v3.0
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SCellAddAtt_AddSbcHoIn
SCellAddSuc_AddSbcHoIn
SCellAddFail_RrcSigTO
SCellRel_AddSbcHoIn
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Appendix B Call Flow
Figure 159. Collection Time for X2 eNB Handover
UE
Source eNB
Target eNB
MME
Measurement Report
HO Decision
Handover Required
1
SCellAddAtt
Scell Decision
2
- SCellAddFail_CaCapaCac
- SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
Handover Request
Acknowledge
Rrc Connection
Reconfiguration
2 SCellAddFail_RrcSigTO
Rrc Connection Reconfiguration Complete
3 SCellAddSucc_RrcSig
Path Switch Request
UE Context Release
SCellRel_HoOut
Path Switch Request
Acknowledge
4
Conditional
Conditional
UE Capability Enquiry
5
CaUECapaEnquiryAdditionalSbc
6
CaUECapaInformationAdditionalSbc
UE Capability Information
Rrc Connection Reconfiguration
Scell Decision
SCellAddFail_CaCapaCac
7 SCellAddFail_CpCcFail
SCellAddFail_CpRrmFail
8
Rrc Connection
Reconfiguration Complete
9
LTE eNB Counter Description for SLR 6.0.0 v3.0
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SCellAddAtt_AddSbcHoIn
SCellAddSuc_AddSbcHoIn
SCellAddFail_RrcSigTO
SCellRel_AddSbcHoIn
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Appendix B Call Flow
Figure 160. Collection Time for S1 eNB Handover
UE
Source eNB
Target eNB
MME
Measurement Report
HO Decision
Handover Required
Handover Request
1
SCellAddAtt
Scell Decision
- SCellAddFail_CaCapaCac
2 - SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
Handover Request Acknowledge
Handover Command
Rrc Connection
Reconfiguration
2 SCellAddFail_RrcSigTO
Rrc Connection Reconfiguration Complete
3 SCellAddSucc_RrcSig
Tracking Area Update Procedure (NAS)
UE Context Release Command
UE Context Release Complete
SCellRel_HoOut 4
Conditional
UE Capability Enquiry
5
CaUECapaEnquiryAdditionalSbc
6
CaUECapaInformationAdditionalSbc
UE Capability Information
Scell Decision
SCellAddFail_CaCapaCac
7 SCellAddFail_CpCcFail
Rrc Connection Reconfiguration
SCellAddFail_CpRrmFail
8
Rrc Connection
Reconfiguration Complete
9
LTE eNB Counter Description for SLR 6.0.0 v3.0
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SCellAddAtt_AddSbcHoIn
SCellAddSuc_AddSbcHoIn
SCellAddFail_RrcSigTO
SCellRel_AddSbcHoIn
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Appendix B Call Flow
Figure 161. Collection Time for A4 Event
eNB
UE
RRC Connected
Measurement Report (A4 event)
1
SCellAddAtt
Scell Decision
Rrc Connection Reconfiguration
Rrc Connection
Reconfiguration Complete
- SCellAddFail_CaCapaCac
2 - SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
2
SCellAddFail_RrcSigTO
3
SCellAddSucc_EventA4
Figure 162. Collection Time for A6 Event
PCell
UE
Source SCell
Target SCell
Measurement Report
(A6 event)
1
SCellAddAtt
Scell Decision
Rrc Connection Reconfiguration
- SCellAddFail_CaCapaCac
2 - SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
2 SCellAddFail_RrcSigTO
Rrc Connection Reconfiguration Complete
SCellAddSucc_EventA6
3
Scell delete
4
SCellRel_EventA6
Scell Setup
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Appendix B Call Flow
Figure 163. Collection Time for A2 Event
eNB
UE
RRC Connected
Measurement Report (A2 event)
1
SCellRel_EventA2
Rrc Connection Reconfiguration
Rrc Connection
Reconfiguration Complete
Figure 164. Collection Time for Rrc Connection Reestablishment
PCell
UE
Source SCell
RRC Connection
Reestablishment Request
Scell delete
1
Target SCell
SCellRel_RrcResetup
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
2
SCellAddAtt
Scell Decision
Rrc Connection Reconfiguration
- SCellAddFail_CaCapaCac
3 - SCellAddFail_CpCcFail
- SCellAddFail_CpRrmFail
3 SCellAddFail_RrcSigTO
Rrc Connection Reconfiguration Complete
4
SCellAddSucc_RrcResetup
Scell Setup
Conditional
Conditional
UE Capability Enquiry
5
CaUECapaEnquiryAdditionalSbc
6
CaUECapaInformationAdditionalSbc
UE Capability Information
Scell Decision
SCellAddFail_CaCapaCac
7 SCellAddFail_CpCcFail
Rrc Connection Reconfiguration
SCellAddFail_CpRrmFail
8
Rrc Connection
Reconfiguration Complete
9
LTE eNB Counter Description for SLR 6.0.0 v3.0
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SCellAddAtt_AddSbcRrcResetup
SCellAddSuc_AddSbcRrcResetup
SCellAddFail_RrcSigTO
SCellRel_AddSbcRrcResetup
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Appendix B Call Flow
Figure 165. Collection Time for Rrc Connection Release
eNB
UE
MME
RRC Connection Establishment
UE Context
Release Command
Rrc Connection Release
1
SCellRel_RrcSig
UE Context
Release Complete
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Appendix B Call Flow
Aggregate Maximum Bit Rate
UE AMBR Override
Figure 166. Collection Time for S1APUEAmbrOverride
UE
eNB
MME
S/GW
RRC_IDLE
Initial Context Setup Request
UE Context Modification Request
E-RAB Setup Request
E-RAB Modify Request
E-RAB Release Command
(with AMBR > User defined limit)
1
S1APUEAmbrOverride
RRC_CONNECTED
Figure 167. Collection Time for S1APUEAmbrOverride in S1 handover case
UE
Source eNB
Target eNB
MME
EPC
S-GW
2) HANDOVER REQUIRED
3) HANDOVER REQUEST
(AMBR > User defined limit)
1
S1APUEAmbrOverride
4) HANDOVER REQUEST ACKNOWLEDGE
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Appendix B Call Flow
Figure 168. Collection Time for X2APUEAmbrOverride in X2 handover case
UE
Source eNB
Target eNB
MME
EPC
S-GW
1) MeasurementReport
2) HANDOVER REQUEST
(AMBR > User defined limit)
1
4) RRCConnectionReconfiguration
(mobilityControlinfo)
X2APUEAmbrOverride
3) HANDOVER REQUEST
ACKNOWLEDGE
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Appendix B Call Flow
KPI
Accessibility
This KPI shows the probability for an end-user to be provided with an E-RAB at
request.

Probability Success Rate for E-RABs Establishment

Successful attempts compared with total number of attempts for the different
parts of the E-RAB establishment
 SAEB.NbrSu ccEstabInit.QCI
 RRC.SuccCo nnEstab.cause
A1  InitialEPS BEstabSR  cause
 RRC.AttConnEstab.cause

QCI
QCI
cause
A2  AddedEPSBE stabSR 
 S1SIG.Conn EstabSucc 
 100
 S1SIG.Conn EstabAtt  SAEB.NbrAttEstabInit.QCI
 SAEB.NbrSuccEstabAdd.QCI
QCI
 SAEB.NbrAttEstabAdd.QCI
 100
QCI
Availability
This section provides statistics on the availability of an E-UTRAN cell.

Percentage of time that the cell is considered available.

The elapsed time from the cell down due to the fault until its recovery.

E-UTRAN Cell Availability
CellAvaila bility 
measuremen t_period -  RRU.CellUnavailableT ime.[cause ]
cause
measurement _ period
100
Integrity
This section provides statistics on the data that shows how E-UTRAN impacts the
service quality provided to an end-user.
Payload data volume on IP level per elapsed time unit on the Uu interface.

E-UTRAN IP Throughput
V _ tp _ DL
IP_ Throughput  Samples
 T _ tp _ DL
Samples

E-UTRAN IP Latency
Downlink
LatQCI  x  DRB.IPLatDlQCI  x
Mobility
This section provides statistics on the data that shows how E-UTRAN Mobility
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Appendix B Call Flow
functionality is working.

Success rate of E-UTRAN mobility
Mobility Success RateQCIx 
HO.ExeSucc HO.PrepSucc.QCI QCIx

100%
HO.ExeAtt
HO.PrepAtt.QCIQCIx
The handover is calculated for each case to produce the KPI.

Intra eNB Handover

X2 Handover Out

X2 Handover In

S1 Handover Out

S1 Handover In

Inter-RAT HPRD Handover
HO.PrepAtt.QCI is calculated by HO.PrepSucc.QCI+HO.PrepFail.QCI.
Retainability
This section provides statistics on a measurement that shows how often an enduser abnormally looses an E-RAB during the time the E-RAB is used. This
statistics item is collected for each cell.
Retainability per QCI
This section provides statistics on the measurement that shows how often an enduser abnormally loses an E-RAB during the time the E-RAB is used. This statistics
item is collected for each QCI.
R1QCI  x 
ERAB . Re lActNbr _ QCIQCI  x
ERAB .SessionTimeQCI _ QCIQCI  x
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Appendix B Call Flow
E-RAB
E-RAB Erase
Figure 169. Collection Time for E-RAB erase
UE
eNB
MME
S/GW
RRC_CONNECTED
Attempt
UE Context Release Command
1
Rrc Connection Release
UE Context Release Complete
Success
2
RRC_CONNECTED
For E-RAB ERASE statistics, an Attempt is counted when the UE Context Release
Command is received, and Success is counted when the UE Context Release
Complete message is transmitted.
E-RAB Erase Request
Figure 170. Collection Time for E-RAB Erase Request
UE
eNB
MME
S/GW
RRC_CONNECTED
UE Context Release Request
Count
1
UE Context Release Command
RRC Connection Release
UE Context Release Complete
RRC_CONNECTED
The eNB E-RAB erase request refers to deleting the UE context. When the eNB
needs to release the UE context, it transmits the UE Context Release Request
message to the MME, and counts statistics.
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Appendix B Call Flow
Figure 171. Collection Time for EraseAttbyEnb_CpCcTo
EPC
eNB
UE
MME
SGW
Time out
E-RAB Release
Resource
Release
...Fail
ERAB Setup Request
① EraseAttbyEnb_CpCcTo
Figure 172. Collection Time for EraseAttbyEnb_CpCcFail
EPC
eNB
UE
MME
SGW
E-RAB Release
Application
Restart
Context Release Request
① EraseAttbyEnb_CpCcFail
Figure 173. Collection Time for EraseAttbyEnb_UpGtpFail
EPC
eNB
UE
MME
SGW
E-RAB Release
GTP layer
release Fail
Context Release Request
① EraseAttbyEnb_UpGtpFail
Figure 174. Collection Time for EraseAttbyEnb_UpMacFail
EPC
eNB
UE
MME
SGW
E-RAB Release
MAC layer
release Fail
Context Release Request
① EraseAttbyEnb_UpMacFail
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Appendix B Call Flow
Figure 175. Collection Time for EraseAttbyEnb_UpMacUEInact
EPC
eNB
UE
MME
SGW
E-RAB Release
Packet
Packet
Inactive
Packet
UE context
setup
Context Release Request
① EraseAttbyEnb_UpMacUeInact
Figure 176. Collection Time for EraseAttbyEnb_UpPdcpFail
EPC
eNB
UE
MME
SGW
E-RAB Release
PDCP layer
release Fail
Context Release Request
① EraseAttbyEnb_UpPdcpFail
Figure 177. Collection Time for EraseAttbyEnb_UpRlcFail
EPC
eNB
UE
MME
SGW
E-RAB Release
RLC layer
Release
Fail
Context Release Request
① EraseAttbyEnb_UpRlcFail
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Appendix B Call Flow
Figure 178. Collection Time for EraseAttbyEnb_RrcHcTo
UE
SeNB
TeNB
EPC
MME
SGW
Handover Request
X2 HO
Handover Acknowledge
Complete
Time out
RrcConnectionReconfiguration
Context Release Request
① EraseAttbyEnb_RrcHCTo
UE
SeNB
TeNB
EPC
MME
SGW
Handover Required
Handover Request
S1 HO
Handover Acknowledge
RrcConnectionReconfiguration
Time out
Complete
Handover Command
Context Release Request
① EraseAttbyEnb_RrcHcTo
Figure 179. Collection Time for EraseAttbyEnb_RrcSigFail
EPC
eNB
UE
MME
SGW
E-RAB Release start
Rrc Connection Reconfiguration
ReEstablishment
Rrc Connection
Reconfiguration Complete
Context Release Request
① EraseAttbyEnb_RrcSigFail
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Appendix B Call Flow
Figure 180. Collection Time for EraseAttbyEnb_RrcSigTo
EPC
eNB
UE
MME
SGW
E-RAB Release start
Rrc Connection
Reconfiguration Complete
Time out
Rrc Connection Reconfiguration
Context Release Request
① EraseAttbyEnb_RrcSigTo
Figure 181. Collection Time for EraseAttbyEnb_S1apCuFail
EPC
eNB
UE
MME
SGW
E-RAB Release
S1AP
Spec.
Cause
Context Release Request
① EraseAttbyEnb_S1apCuFail
Figure 182. Collection Time for EraseAttbyEnb_S1apRoTo
UE
TeNB
Rrc Connection Reconfiguration
Complete
SeNB
EPC
MME
SGW
Handover Command
Fail to
allocate
Resource
for Data
forwarding
Context Release
Request
① EraseAttbyEnb_S1apRoTo
LTE eNB Counter Description for SLR 6.0.0 v3.0
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Appendix B Call Flow
Figure 183. Collection Time for EraseAttbyEnb_S1apSigTo
EPC
eNB
UE
MME
SGW
Rrc Connection Request
Rrc Connection Setup
Rrc Connection Setup Complete
Time out
Attach Request
Initial Context Setup
Request
Context Release Request
① EraseAttbyEnb_S1apSigTo
UE
SeNB
TeNB
EPC
MME
SGW
Rrc Connection Reconfiguration
eNB Status Transfer
Complete
Time out
MME Status Transfer
Context Release Request
① EraseAttbyEnb_S1apSigTo
Figure 184. Collection Time for EraseAttbyEnb_X2apRoTo
UE
SeNB
TeNB
EPC
MME
SGW
Handover Request
Handover Acknowledge
Fail to
allocate
Resource
for Data
forwarding
Context Release
Request
① EraseAttbyEnb_X2apRoTo
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Appendix B Call Flow
E-RAB Setup
Figure 185. Collection Time for E-RAB Setup
UE
eNB
MME
S/GW
RRC_CONNECTED
Authentication Procedure (NAS)
Security Mode Command
Initial Context Setup Request
1
Attempt
2
Success
Security Mode Complete
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
Initial Context Setup Response
RRC_CONNECTED
Figure 186. Collection Time for ErabInitFailNbr_CpCcTo
UE
EPC
eNB
MME
SGW
Initial Context Setup Request
UE context
setup
CSFB to
not
supported
RAT type
① ErabInitFailNbr_CpCcFail
Figure 187. Collection Time for ErabInitFailNbr_CpCcFail
UE
EPC
eNB
MME
Initial Context Setup Request
CSFB to
not
supported
RAT type
SGW
UE context
setup
① ErabInitFailNbr_CpCcFail
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Appendix B Call Flow
Figure 188. Collection Time for ErabInitFailNbr_UpGtpFail
EPC
eNB
UE
MME
SGW
Initial Context Setup Request
UECapabilityEnquiry
UECapabilityInformation
SecurityModeCommand
UECapabilityInfoIndication
UE context
setup
GTP
layer
Setup
Fail
① ErabInitFailNbr_UpGtpFail
Figure 189. Collection Time for ErabInitFailNbr_UpMacFail
EPC
eNB
UE
MME
SGW
Initial Context Setup Request
UECapabilityEnquiry
UECapabilityInformation
SecurityModeCommand
UECapabilityInfoIndication
UE context
setup
MAC
layer
Setup
Fail
① ErabInitFailNbr_UpMacFail
Figure 190. Collection Time for ErabInitFailNbr_UpPdcpFail
eNB
UE
EPC
MME
SGW
Initial Context Setup Request
UECapabilityEnquiry
UECapabilityInformation
SecurityModeCommand
UECapabilityInfoIndication
PDCP
layer
Setup
Fail
UE context
setup
① ErabInitFailNbr_UpPdcpFail
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Appendix B Call Flow
Figure 191. Collection Time for ErabInitFailNbr_UpRlcFail
EPC
eNB
UE
MME
SGW
Initial Context Setup Request
UECapabilityEnquiry
UECapabilityInformation
SecurityModeCommand
UECapabilityInfoIndication
UE context
setup
RLC
Layer
Setup
Fail
① ErabInitFailNbr_UpRlcFail
EPC
eNB
UE
MME
SGW
Connected
.....
Traffic Packet
ARQ ack
ARQ ack
ARQ ack
Not
recieved
ARQ ack
① ErabInitFailNbr_UpRlcFail
Figure 192. Collection Time for ErabInitFailNbr_RrcSigFail
eNB
UE
UECapabilityEnquiry
UECapabilityInformation
SecurityModeCommand
EPC
MME
SGW
Initial Context Setup Request
UECapabilityInfoIndication
SecurityModeComplete
Rrc Connection
Reconfiguration
ReEstablishment
Rrc Connection
Reconfiguration Complete
LTE eNB Counter Description for SLR 6.0.0 v3.0
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① ErabInitFailNbr_RrcSigFail
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Appendix B Call Flow
Figure 193. Collection Time for ErabInitFailNbr_RrcSigTo
EPC
eNB
UE
MME
SGW
Initial Context Setup Request
UECapabilityEnquiry
UECapabilityInformation
UECapabilityInfoIndication
SecurityModeCommand
Time out
SecurityModeComplete
UE context
setup
① ErabInitFailNbr_RrcSigTo
EPC
eNB
UE
MME
SGW
Rrc Connection
Reconfiguration
Complete
Time out
Rrc Connection Reconfiguration
① ErabInitFailNbr_RrcSigTo
Figure 194. Collection Time for ErabInitFailNbr_CpBhCacFail
UE
EPC
eNB
MME
SGW
Initial Context Setup Request
UE context
setup
Rejected
By
BH CAC
① ErabInitFailNbr_CpBhCacFail
Figure 195. Collection Time for ErabInitFailNbr_CpCapaCacFail
UE
EPC
eNB
MME
SGW
Initial Context Setup Request
Rejected
By
Capacity
CAC
UE context
setup
① ErabInitFailNbr_CpCacaCacFail
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Appendix B Call Flow
Figure 196. Collection Time for ErabInitFailNbr_CpQosCacFail
EPC
eNB
UE
MME
SGW
Initial Context Setup Request
UE context
setup
Rejected
By
QoS CAC
① ErabInitFailNbr_CpQosCacFail
Figure 197. Collection Time for ErabInitFailNbr_S1apCuFail
EPC
eNB
UE
MME
SGW
Initial Context Setup Request
UE context
setup
Invalid
E-RAB
Info.
① ErabInitFailNbr_S1apCuFail
Figure 198. Collection Time for ErabInitFailNbr_S1apLinkFail
EPC
eNB
UE
MME
SGW
Connected
Out Of Service
① ErabInitFailNbr_S1apLinkFail
Figure 199. Collection Time for ErabInitFailNbr_S1apSigFail
UE
EPC
eNB
MME
SGW
Initial Context Setup Request
UE context
setup
Integrity algorithm == EIA0
&&
Ciphering algorithm != EEA0
① ErabInitFailNbr_S1apSigFail
UE
eNB
EPC
MME
SGW
UE Context Release Command
(or S1AP Reset)
① ErabInitFailNbr_S1apSigFail
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For E-RAB setup count statistics, Attempt is counted when the Initial Context
Setup Request message is received during the initial call setup, and Success is
counted when the Initial Context Setup Response message is transmitted. A failure
is counted when a timeout or failure occurs during the procedure and the
applicable cause value is recorded.
E-RAB Setup Add
Figure 200. Collection Time for ErabAddFailNbr_CpCcTo
EPC
eNB
UE
MME
SGW
Time out
ERAB Setup Request
E_RAB
Setup
Resource
Allocation
… Fail
① ErabAddFailNbr_CpCcTo
Figure 201. Collection Time for ErabAddFailNbr_CpCcFail
UE
EPC
eNB
MME
SGW
ERAB Setup Request
E_RAB
Setup
Application
Restart
① ErabAddFailNbr_CpCcFail
Figure 202. Collection Time for ErabAddFailNbr_UpGtpFail
UE
EPC
eNB
MME
ERAB Setup Request
SGW
E_RAB
Setup
GTP layer
Setup Fail
① ErabAddFailNbr_UpGtpFail
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Figure 203. Collection Time for ErabAddFailNbr_UpMacFail
EPC
eNB
UE
MME
SGW
ERAB Setup Request
MAC layer
Setup Fail
① ErabAddFailNbr_UpMacFail
Figure 204. Collection Time for ErabAddFailNbr_UpPdcpFail
EPC
eNB
UE
MME
SGW
ERAB Setup Request
E_RAB
Setup
PDCP layer
Setup Fail
① ErabAddFailNbr_UpPdcpFail
Figure 205. Collection Time for ErabAddFailNbr_UpRlcFail
EPC
eNB
UE
MME
SGW
ERAB Setup Request
E_RAB
Setup
RLCP
layer
Setup Fail
① ErabAddFailNbr_UpRlcFail
eNB
UE
EPC
MME
SGW
Connected
......
.
Traffic Packet
ARQ ack
ARQ ack
ARQ ack
Not
recieved
ARQ ack
① ErabAddFailNbr_UpRlcFail
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Appendix B Call Flow
Figure 206. Collection Time for ErabAddFailNbr_RrcSigFail
EPC
eNB
UE
Rrc Connection
Reconfiguration
MME
SGW
ERAB Setup Request
ReEstablishment
① ErabAddFailNbr_RrcSigFail
Rrc Connection
Reconfiguration Complete
Figure 207. Collection Time for ErabAddFailNbr_RrcSigTo
EPC
eNB
UE
Rrc Connection
Reconfiguration
MME
SGW
Time out
ERAB Setup Request
Rrc Connection
Reconfiguration Complete
① ErabAddFailNbr_RrcSigTo
Figure 208. Collection Time for ErabAddFailNbr_CpBhCacFail
UE
EPC
eNB
MME
SGW
ERAB Setup Request
Rejected
By
BH CAC
UE context setup
① ErabAddFailNbr_CpBhCacFail
Figure 209. Collection Time for ErabAddFailNbr_CpCapaCacFail
UE
EPC
eNB
MME
SGW
ERAB Setup Request
Rejected
By
Capacity
CAC
UE context setup
① ErabAddFailNbr_CpCapaCacFail
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Appendix B Call Flow
Figure 210. Collection Time for ErabAddFailNbr_CpQosCacFail
EPC
eNB
UE
MME
SGW
ERAB Setup Request
Rejected
By
QoS CAC
UE context setup
① ErabAddFailNbr_CpQosCacFail
Figure 211. Collection Time for ErabAddFailNbr_S1apCuFail
EPC
eNB
UE
MME
SGW
ERAB Setup Request
Invalid
E-RAB
Info.
UE context setup
① ErabAddFailNbr_S1apCuFail
Figure 212. Collection Time for ErabAddFailNbr_S1apLinkFail
EPC
eNB
UE
MME
SGW
ERAB Setup Request
Out Of Service
① ErabAddFailNbr_S1apLinkFail
Figure 213. Collection Time for ErabAddFailNbr_S1apSigFail
UE
EPC
eNB
MME
SGW
ERAB Setup Request
UE Context Release Command
(or S1AP Reset)
① ErabAddFailNbr_S1apSigFail
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Appendix B Call Flow
Figure 214. Collection Time for ErabAddFailNbr_CpCcInteraction
TeNB
or
Other RAT
UE
EPC
SeNB
MME
SGW
Handover Request
Handover Request Acknowledge
Rrc Connection Reconfiguration
X2 HO
ERAB Setup Request
E-RAB
Add fail
① ErabAddFailNbr_CpCcInteraction
TeNB
or
Other RAT
UE
EPC
SeNB
MME
SGW
Handover Required
Handover Request
S1 HO
Handover Request Acknowledge
Rrc Connection Reconfiguration
Handover Command
ERAB Setup Request
E-RAB
Add fail
① ErabAddFailNbr_CpCcInteraction
For additional E-RAB setup count statistics, Attempt is counted when the E-RAB
Setup Request message is received during the additional E-RAB setup, and
Success is counted when the E-RAB Setup Response message is transmitted. A
Failure is counted when a timeout or failure occurs during the procedure and the
applicable cause value is recorded.
E-RAB Modify
Figure 215. Collection Time for E-RAB modify
UE
eNB
MME
S/GW
RRC_CONNECTED
Attempt
E-RAB Modify Request
1
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
Success
2
E-RAB Modify Response
RRC_CONNECTED
For E-RAB Modify statistics, Attempt is counted when the E-RAB Modify
Request message is received from the MME, and Success is counted when the ELTE eNB Counter Description for SLR 6.0.0 v3.0
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Appendix B Call Flow
RAB Modify Response message is transmitted. A Failure is counted when the ERAB Modify procedure fails due to an internal timeout or failure, and the
applicable cause value is recorded.
Figure 216. Collection Time for ModQoSFailNbr_CpCcTo
EPC
eNB
UE
MME
SGW
Time out
ERAB Modify Request
Resource
Allocation
… Fail
① ModQoSFailNbr_CpCTo
Figure 217. Collection Time for ModQoSFailNbr_CpCcFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
Application
Restart
① ModQoSFailNbr_CpCcFail
Figure 218. Collection Time for ModQoSFailNbr_UpGtpFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
GTP layer
Setup Fail
① ModQoSFailNbr_UpGtpFail
Figure 219. Collection Time for ModQoSFailNbr_UpMacFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
MAC layer
Setup Fail
① ModQoSFailNbr_UpMacFail
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Appendix B Call Flow
Figure 220. Collection Time for ModQoSFailNbr_UpPdcpFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
PDCP layer
Setup Fail
① ModQoSFailNbr_UpPdcpFail
Figure 221. Collection Time for ModQoSFailNbr_UpRlcFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
RLCP
layer
Setup Fail
① ModQoSFailNbr_UpRlcFail
EPC
eNB
UE
MME
SGW
Connected
......
Traffic Packet
ARQ ack
ARQ ack
ARQ ack
Not
recieved
ARQ ack
① ModQoSFailNbr_UpRlcFail
Figure 222. Collection Time for ModQoSFailNbr_RrcSigFail
EPC
eNB
UE
Rrc Connection
Reconfiguration
ReEstablishment
MME
SGW
ERAB Modify Request
① ModQoSFailNbr_RrcSigFail
Rrc Connection
Reconfiguration Complete
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Appendix B Call Flow
Figure 223. Collection Time for ModQoSFailNbr_RrcSigTo
EPC
eNB
UE
Rrc Connection
Reconfiguration
MME
SGW
Time out
ERAB Modify Request
Rrc Connection
Reconfiguration Complete
① ModQoSFailNbr_RrcSigTo
Figure 224. Collection Time for ModQoSFailNbr_CpBhCacFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
Rejected
By
BH CAC
① ModQoSFailNbr_CpBhCacFail
Figure 225. Collection Time for ModQoSFailNbr_CpCapaCacFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
Rejected
By
Capacity
CAC
① ModQoSFailNbr_CpCapaCacFail
Figure 226. Collection Time for ModQoSFailNbr_CpQosCacFail
EPC
eNB
UE
MME
SGW
ERAB Modify Request
Rejected
By
QoS CAC
① ModQoSFailNbr_CpQosCacFail
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Appendix B Call Flow
Figure 227. Collection Time for ModQoSFailNbr_S1apCuFail
UE
EPC
eNB
MME
SGW
ERAB Modify Request
Invalid
E-RAB
Info.
① ModQoSFailNbr_S1apCuFail
Figure 228. Collection Time for ModQoSFailNbr_S1apLinkFail
UE
EPC
eNB
MME
SGW
ERAB Modify Request
Out Of Service
① ModQoSFailNbr_S1apLinkFail
Figure 229. Collection Time for ModQoSFailNbr_S1apSigFail
UE
eNB
EPC
MME
SGW
ERAB Modify Request
UE Context Release Command
(or S1AP Reset)
① ModQoSFailNbr_S1apSigFail
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Appendix B Call Flow
Figure 230. Collection Time for ModQoSFailNbr_CpCcInteraction
TeNB
or
Other RAT
UE
EPC
SeNB
MME
SGW
Handover Request
Handover Request Acknowledge
Rrc Connection Reconfiguration
X2 HO
ERAB Modify Request
E-RAB
Add fail
① ModQoSFailNbr_CpCcInteraction
TeNB
or
Other RAT
UE
EPC
SeNB
MME
Handover Request
SGW
Handover Required
Handover Request
S1 HO
Handover Request Acknowledge
Handover Command
Rrc Connection Reconfiguration
ERAB Modify Request
E-RAB
Add fail
① ModQoSFailNbr_CpCcInteraction
Active E-RAB Number
Figure 231. Collection Time for UsageNbrAvg/Max/Tot/Cnt
# of E-RAB
A
Statistics Gathering Period
C
B
Statistics Gathering Period
E
F
.
.
.
5
6
1
D
t
1
2
3
4
ⓞ UsageNbr
= ② UsageNbrTot/③ UsageNbrCnt
① UsageNbrMax = C
② UsageNbrTot = A + B + C + D + E + F
③ UsageNbrCnt
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E-RAB QCI per-PLMN rejected
Figure 232. Collection Time for PLMN0~5QCIReject
EPC
eNB
MME
SGW
Initial UE Context Setup or
E-RAB Setup Request or
E-RAB Setup Modify(Add)
...for QCI X(PLMN Y)
QCI X
Is not
allowed
(PLMN Y)
Reject for QCI X
(PLMN Y)
ⓞ PLMN0QCIReject
① PLMN1QCIReject
② PLMN2QCIReject
③ PLMN3QCIReject
④ PLMN4QCIReject
⑤ PLMN5QCIReject
ⓞ, ①, ②, ③, ④, ⑤
E-RAB Release
Figure 233. Collection Time for E-RAB release
UE
eNB
MME
S/GW
RRC_CONNECTED
Attempt
E-RAB Release Command
1
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
Success
2
E-RAB Release Response
RRC_CONNECTED
Figure 234. Collection Time for RelFailNbr_CpCcFail
EPC
eNB
UE
MME
SGW
ERAB Release Command
Application
Restart
① RelFailNbr_CpCcFail
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Figure 235. Collection Time for RelFailNbr_S1apSigFail
EPC
eNB
UE
MME
SGW
ERAB Release Command
UE Context Release Command
(or S1AP Reset)
ERAB Release Response
① RelFailNbr_S1apSigFail
Figure 236. Collection Time for RelFailNbr_S1apCuFail
EPC
eNB
UE
MME
SGW
ERAB Release Command
S1AP
Cause
ERAB Release Response
① RelFailNbr_S1apCuFail
Figure 237. Collection Time for RelActive
EPC
eNB
UE
MME
SGW
ERAB Release Command
# of E-RAB
BY Abnormal
Operation
In eNB
ERAB Release Response
① RelActive
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Figure 238. Collection Time for RelFailNbr_CpCcInteraction
UE
TeNB
or
Other RAT
EPC
SeNB
MME
SGW
Handover Request
Handover Request Acknowledge
Rrc Connection Reconfiguration
X2 HO
ERAB Release
Command
E-RAB
Add fail
ERAB Release
Response
① RelFailNbr_CpCcInteraction
UE
TeNB
or
Other RAT
EPC
SeNB
MME
SGW
Handover Required
Handover Request
Handover Request Acknowledge
S1 HO
Handover Command
ERAB Release
Command
Rrc Connection Reconfiguration
E-RAB
Add fail
ERAB Release
Response
① RelFailNbr_CpCcInteraction
For E-RAB release statistics, when the E-RAB Release Request message is
received from the MME, it is counted as Attempt; when the E-RAB Release
Response message is transmitted, it is counted as Success. A Failure is counted
when the E-RAB Release procedure fails due to S1 MSG receiving, and the
applicable cause value is recorded. Also, A Failure is counted when the procedure
fails due to the E-RAB Release Command or an internal timeout and failure, the
applicable cause value is recorded.
E-RAB Release Request
Figure 239. Collection Time for eNB E-RAB release request
UE
eNB
MME
S/GW
RRC_CONNECTED
Count
1
Rrc Connection Reconfiguration
E-RAB Release Indication
E-RAB Release Command
Rrc Connection Reconfiguration Complete
E-RAB Release Response
RRC_CONNECTED
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Appendix B Call Flow
The eNB E-RAB Release statistics are counted when the eNB deletes the
applicable bearers as needed and transmits the E-RAB Release Indication message
to the MME.
Figure 240. Collection Time for RelAttbyEnbNbr_CpCcTo
EPC
eNB
UE
MME
SGW
Time out
E-RAB Release start
S1AP
Spec.
Cause
E_RAB Release Indication
① RelAttbyEnbNbr_CpCcTo
Figure 241. Collection Time for RelAttbyEnbNbr_S1apCuFail
EPC
eNB
UE
MME
SGW
E-RAB Release start
UE Context Release Command
(S1AP Spec. cause)
E_RAB Release Indication
① RelAttbyEnbNbr_S1apCuFail
E-RAB Session Time per QCI
Figure 242. Collection Time for SessionTimeQciAvg/Tot/Cnt
In-session time of
ERAB G of QCI9
3
In-session time of
ERAB F of QCI9
In-session time of
ERAB C of QCI9
2
In-session time of
ERAB E of QCI9
In-session time of
ERAB B of QCI9
1
Statistics Gathering Period
In-session time of
ERAB D of QCI9
In-session time of
ERAB A of QCI9
Statistics Gathering Period
1
2
3
4
t
ⓞ SessionTimeQCI
= SessionTimeQCITot/SessionTimeQCICnt
① SessionTimeQCITot = In-session time of E-RAB A + B + C in same QCI
② SessionTimeQCICnt
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Appendix B Call Flow
E-RAB Session Time per Cell
Figure 243. Collection Time for SessionTimeUEAvg/Tot/Cnt
In-session time
of UE_G in Cell 0
3
In-session time
of UE_F in Cell 0
In-session time
of UE_C in Cell 0
2
In-session time
of UE_E in Cell 0
In-session time
of UE_B in Cell 0
1
Statistics Gathering Period
In-session time
of UE_D in Cell 0
In-session time
of UE_A in Cell 0
Statistics Gathering Period
1
2
3
4
t
⓪ SessionTimeUE
= SessionTimeUETot/SessionTimeUECnt
① SessionTimeUETot = In-session time of UE A + B + C in same cell
② SessionTimeUECnt
E-RAB Setup Time
Figure 244. Collection Time for E-RAB Setup time
UE
eNB
MME
S/GW
RRC_IDLE
Security Mode Command
Initial Context Setup Request
Security Mode Complete
RRC Connection Reconfiguration
E-RAB Setup time
RRC Connection Reconfiguration Complete
Initial Context Setup Response
RRC_CONNECTED
The E-RAB setup time indicates the duration from receiving the Initial Context
Setup Request message up to transmitting the Initial Context Setup Response,
which is reported in milliseconds. The statistics block calculates the average and
maximum values of the setup time during the collection period.
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Appendix B Call Flow
Figure 245. Collection Time for E-RAB Setup time (Cause)
UE
eNB
MME
S/GW
RRC_IDLE
Security Mode Command
Initial Context Setup Request
Security Mode Complete
RRC Connection Reconfiguration
E-RAB Setup time
RRC Connection Reconfiguration Complete
Initial Context Setup Response
RRC_CONNECTED
The E-RAB setup time is a time taken from receiving the Initial Context Setup
Request message to transmitting the Initial Context Setup Response, and is
reported. The statistics block calculates its average and maximum values at every
collection interval.
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Appendix B Call Flow
UE Category
UE Category
Figure 246. Collection Time for UE Category
eNB
UE
UE Capability Enquiry
UE Capability Information
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Appendix B Call Flow
Scheduler
Measurement Report
Figure 247. Collection Time for Measurement Report
eNB
UE
Rrc Connection Reconfiguration
Rrc Connection
Reconfiguration Complete
Measurement Report
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Appendix B Call Flow
HO EUTRAN
S1 Handover
Figure 248. S1 Handover Procedure
UE
Source eNB
MME
Target eNB
Downlink/Uplink data
EPC
S-GW
Downlink/Uplink data
1) Decision to trigger a relocation via S1
2) HANDOVER REQUEST
HO attempt
HO attempt
HO Preparation
3) HANDOVER REQUEST
4) HANDOVER REQUEST
ACKNOWLEDGE
HO Preparation
8) RRCConnectionReconfiguration
(mobilityControlinfo)
5) Create Indirect Data
Forwarding Tunnel Request
6) Create Indirect Data
Forwarding Tunnel Response
7) HANDOVER COMMAND
9) eNB STATUS TRANSFER
1) Direct data forwarding
10) MME STATUS TRANSFER
2) Indirect data forwarding
Indirect data forwarding
11) Detach from old cell/Synchronize to new cell
12) RRCConnectionReconfigurationComplete
Forwarded data
Uplink data
Uplink data
HO Success
13) HANDOVER NOTIFY
End marker
14) Modify Bearer Request
15) Modify Bearer Response
Forwarded data
End marker
Downlink data
Downlink data
16) Tracking Area Update procedure
17) UE CONTEXT RELEASE COMMAND
HO Success
18) UE CONTEXT RELEASE COMPLETE
19) Delete Indirect Data
Forwarding Tunnel Request
20) Delete Indirect Data
Forwarding Tunnel Response
Downlink/Uplink data
Downlink/Uplink data
Step
Description
1)
The source eNB determines whether to perform S1-based handover into the
target eNB. The source eNB can make this decision when there is no X2
connection to the target or when an error is notified by the target eNB after an
X2-based handover has failed, or based on the information the source eNB
has obtained dynamically.
2)
The source eNB transmits the HANDOVER REQUIRED message to the
MME.
The source eNB notifies the target eNB which bearer is used for data
forwarding and whether forwarding can be made directly from the source eNB
to the target eNB.
3)-4)
The MME transmits the HANDOVER REQUEST message to the target eNB.
This message makes the target eNB create a UE context containing the
bearer-related information and the security context.
The target eNB transmits the HANDOVER REQUEST ACKNOWLEDGE
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Step
Description
message to the MME.
5)-6)
If indirect forwarding is used, the MME sends the Create Indirect Data
Forwarding Tunnel Request message to the S-GW. The S-GW replies the
MME with the Create Indirect Data Forwarding Tunnel Response message.
7)-8)
The MME sends the HANDOVER COMMAND message to the source eNB.
The source eNB creates the RRCConnectionReconfiguration message using
the Target to Source Transparent Container IE encapsulated in the
HANDOVER COMMAND message and then transmits it to the UE.
9)-10)
To transmit the PDCP and HFN status of the E-RABs of which the PDCP
status must be preserved, the source eNB transmits the eNB/MME STATUS
TRANSFER message to the target eNB via the MME. The source eNB must
start forwarding the downlink data to the target eNB through the bearer which
was determined to be used for data forwarding. This can be either direct or
indirect forwarding.
11)
The UE performs synchronization with the target eNB and connects to the
target cell via a RACH.
The target eNB responds with UL allocation and a timing advance value.
12)
After having synchronized with the target cell, the UE notifies the target eNB
that the Handover procedure has been completed using the
RRCConnectionReconfiguration Complete message. The downlink packets
forwarded from the source eNB can be transmitted to the UE.
The uplink packets can also be transmitted from the UE to the S-GW via the
target eNB.
13)
The target eNB sends the HANDOVER NOTIFY message to the MME. The
MME starts the timer which tells when the resources of the source eNB and
the temporary resources used by the S-GW for indirect forwarding will be
released.
14)
The MME transmits the Modify Bearer Request message for each PDN
connection to the S-GW.
Downlink packets are transmitted from the S-GW to the target eNB
immediately.
15)
The S-GW transmits a Modify Bearer Response message to the MME. As
soon as the target eNB changes the path to help packet reordering, the SGW transmits at least one ‘end marker’ packet to the source eNB through the
previous path.
16)
If any of the conditions listed in section 5.3.3.0 of TS 23.401 (6) are met, the
UE starts the Tracking Area Update procedure.
17)-18)
When the timer started at step 13) expires, the MME sends the UE
CONTEXT RELEASE COMMAND message to the source eNB. The source
eNB releases the resources related to the UE and replies with the UE
CONTEXT RELEASE COMPLETE message.
19)-20)
If indirect forwarding has been used, when the timer started at Step 13)
expires the MME transmits the Delete Indirect Data Forwarding Tunnel
Request message to the S-GW. This message gets the S-GW to release the
temporary resources allocated for indirect forwarding at Step 5).
The S-GW responds to the MME with the Delete Indirect Data Forwarding
Tunnel Response message.
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Appendix B Call Flow
X2 Handover
Figure 249. X2 Based Handover Statistics processing
UE
Source eNB
MME
Target eNB
Downlink data
EPC
S-GW
Downlink data
1) MeasurementReport
4) RRCConnectionReconfiguration
(mobilityControlinfo)
2) HANDOVER REQUEST
HO attempt
3) HANDOVER REQUEST
ACKNOWLEDGE
HO Preparation
5) SN STATUS TRANSFER
Data forwarding
6) Synchronization/UL allocation and timing advance
7) RRCConnectionReconfigurationComplete
Forwarded data
Uplink data
Uplink data
8) PATH SWITCH REQUEST
9) Modify Bearer Request
End marker
Forwarded data
End marker
12) UE CONTEXT RELEASE
Down/Uplink data
Downlink data
11) PATH SWITCH
REQUEST
ACKNOWLEDGE
10) Modify Bearer Response
HO Success
Down/Uplink data
Step
Description
1)
The UE transmits the MeasurementReport message according to the system
information, standards and rules.
The source eNB determines whether to perform the UE handover based on
the MeasurementReport message and the radio resource management
information.
2)
The source eNB sends the target eNB a HANDOVER REQUEST message
containing the information required for handover. The target eNB can perform
management control in accordance with the E-RAB QoS information received.
3)-4)
The target eNB creates the RRCConnectionReconfiguration message which
contains the mobileControlInfo IE for preparing and executing the handover.
The target eNB transmits RRCConnectionReconfiguration to the source eNB,
which is encapsulated in the HANDOVER REQUEST ACKNOWLEDGE
message. The source eNB transmits the RRCConnectionReconfiguration
message and the necessary parameters to the UE to command it to perform
the handover.
5)
To transmit the uplink PDCP SN receiver status and the downlink PDCP SN
transmitter status of the E-RABs of which the PDCP status must be preserved,
the source eNB transmits the SN STATUS TRANSFER message to the target
eNB.
6)
After receiving the RRCConnectionReconfiguration message that
encapsulates the mobileControlInfo IE, the UE performs synchronization with
the target eNB and accesses the target cell via the Random Access CHannel
(RACH). The target eNB responds with UL allocation and a timing advance
value.
7)
After having connected to the target cell successfully, the UE notifies the
target eNB that the Handover procedure has been completed using an
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Appendix B Call Flow
Step
Description
RRCConnection-ReconfigurationComplete message.
8)
The target eNB, using the PATH SWITCH REQUEST message, notifies the
MME that the UE has changed the cell.
9)-10)
The MME sends the Modify Bearer Request message to the S-GW. The SGW changes the downlink data path into the target eNB. The S-GW transmits
at least one ‘end marker’ to the source eNB through the previous path, and
releases the user plane resources for the source eNB.
The S-GW transmits a Modify Bearer Response message to the MME.
11)
The MME transmits the PATH SWITCH REQUEST ACKNOWLEDGE
message to acknowledge the PATH SWITCH REQUEST message
12)
The target eNB sends the UE CONTEXT RELEASE message to the source
eNB to notify the handover has succeeded and to make the source eNB
release its resources. If the source eNB receives the UE CONTEXT RELEASE
message, it releases the radio resources and the control plane resources
related to the UE context.
Intra-eNB Handover
Figure 250. Intra-eNB HandoverStatistics processing
UE
Source cell
1) MeasurementReport
3) RRCConnection-Reconfiguration
(mobilityControlinfo)
HO success
Target cell
HO attempt
2) Target Cell Preparation
HO preparation
4) RRCConnectionReconfigurationComplete
Steps
Description
1)
Intra eNB handover is determined based on the measurement report.
2)
New RLC, MAC and PHY configurations are set for the target cell.
3)
When the resource setup is completed in the target cell, the RRC Connection
Reconfiguration message is transmitted to instruct the UE to perform
handover.
4)
The RRC Connection Reconfiguration Complete message is received to
complete the intra handover successfully.
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Appendix B Call Flow
Figure 251. Collection Time for Intra eNB Handover
UE
eNB
UE moves to Intra eNB Cell
Measurement Report
Rrc Connection Reconfiguration
Attempt
1
HO Decision
Prepare
2
Target Cell
Preparation
Success
3
Internal Path
Switch
Rrc Connection Reconfiguration Complete
Figure 252. Collection Time for IntraEnbPrepFail_CpCcTo
eNB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
HO Decision
1
Target Cell
Preparation
Prepare
Resource Setup
2
X
Timer Internal Resource Setup
Failure
- IntraEnbPrepFail_CpCcTo
RRC Connected
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Appendix B Call Flow
Figure 253. Collection Time for IntraEnbPrepFail_CpCcFail (1)
eNB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
ECMB reset
Failure
- IntraEnbPrepFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 254. Collection Time for IntraEnbPrepFail_CpCcFail (2)
eNB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
Cell disabled
Failure
- IntraEnbPrepFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 255. Collection Time for IntraEnbPrepFail_CpCcFail (3)
eNB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
Mismatch of UE information in
the execution of audit between
the ECCB and RLC/MAC
Failure
- IntraEnbPrepFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 256. Collection Time for IntraEnbPrepFail_CpCcFail (4)
eNB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Target cell resource allocation
Failure
Prepare
2
Resource Setup
X
Failure
- IntraEnbPrepFail_CpCcFail
RRC Connected
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Appendix B Call Flow
Figure 257. Collection Time for IntraEnbPrepFail_UpMacFail (1)
eNB
Source
Cell
UE
Target Cell
(MAC)
UE moves to Intra eNB Cell
Measurement Report
1
Attempt
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
Fail Message
Failure
- IntraEnbPrepFail_UpMacFail
RRC Connected
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Appendix B Call Flow
Figure 258. Collection Time for IntraEnbPrepFail_UpMacFail (2)
eNB
Source
Cell
UE
Target Cell
(MAC)
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
A mismatch of UE information occurred
in the execution of audit between the
ECCB and MAC.
Failure
- IntraEnbPrepFail_UpMacFail
Call Release
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Appendix B Call Flow
Figure 259. Collection Time for IntraEnbPrepFail_UpRlcFail (1)
eNB
Source
Cell
UE
Target Cell
(RLC)
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
Fail Message
Failure
- IntraEnbPrepFail_UpRlcFail
RRC Connected
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Appendix B Call Flow
Figure 260. Collection Time for IntraEnbPrepFail_UpRlcFail (2)
eNB
Source
Cell
UE
Target Cell
(RLC)
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
A mismatch of UE information
occurred in the execution of audit
between the ECCB and RLC.
Failure
- IntraEnbPrepFail_UpRlcFail
Call Release
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Appendix B Call Flow
Figure 261. Collection Time for IntraEnbPrepFail_CpBhCacFail
eNB
Source
Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
2
CAC based on Backhaul Bandwidth
Fail
Failure
- IntraEnbPrepFail_CpBhCacFail
Resource Setup
X
RRC Connected
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Appendix B Call Flow
Figure 262. Collection Time for IntraEnbPrepFail_CpCapaCacFail
eNB
Source
Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
2
CAC based on Call Count per Cell Fail
or
CAC based on DRB Count per Cell Fail
Failure
- IntraEnbPrepFail_CpCapaCacFail
Resource Setup
X
RRC Connected
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Appendix B Call Flow
Figure 263. Collection Time for IntraEnbPrepFail_CpQosCacFail
eNB
Source
Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
CAC based on QoS Fail
Prepare
2
Failure
- IntraEnbPrepFail_CpQosCacFail
Resource Setup
X
RRC Connected
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Appendix B Call Flow
Figure 264. Collection Time for IntraEnbPrepFail_S1apCuFail
eNB
Source
Cell
UE
Target Cell
MME
S/GW
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraEnbPrepFail_S1apCuFail
Call Release
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Appendix B Call Flow
Figure 265. Collection Time for IntraEnbPrepFail_S1apLinkFail (1)
eNB
Source
Cell
UE
Target Cell
MME
S/GW
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
S1AP Link is Out Of Service Status
X
Failure
- IntraEnbPrepFail_S1apLinkFail
Call Release
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Appendix B Call Flow
Figure 266. Collection Time for IntraEnbPrepFail_S1apLinkFail (2)
eNB
Source
Cell
UE
Target Cell
MME
S/GW
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
SCTB reset
Failure
- IntraEnbPrepFail_S1apLinkFail
Call Release
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Appendix B Call Flow
Figure 267. Collection Time for IntraEnbPrepFail_S1apSigFail (1)
eNB
Source
Cell
UE
Target Cell
MME
S/GW
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraEnbPrepFail_S1apSigFail
Call Release
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Appendix B Call Flow
Figure 268. Collection Time for IntraEnbPrepFail_S1apSigFail (2)
eNB
Source
Cell
UE
Target Cell
MME
S/GW
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Resource Setup
Prepare
2
RESET
Failure
- IntraEnbPrepFail_S1apSigFail
Call Release
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Appendix B Call Flow
Figure 269. Collection Time for IntraEnbFail_CpCcTo
eNB
Source Cell
(PDCP/RLC)
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Execution
3
Re-establish control
Success Message
X
Timer Internal Reestablish Control
Failure
- IntraEnbPrepFail_CpCcTo
Call Release
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Appendix B Call Flow
Figure 270. Collection Time for IntraEnbFail_CpCcFail (1)
eNB
Source Cell
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
ECMB reset
Failure
- IntraEnbFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 271. Collection Time for IntraEnbFail_CpCcFail (2)
eNB
Source Cell
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
Cell disabled
Failure
- IntraEnbFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 272. Collection Time for IntraEnbFail_CpCcFail (3)
eNB
Source Cell
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
Prepare
1
HO Decision
Target Cell
Preparation
2
Resource Setup
Rrc Connection Reconfiguration
Re-establish control
Execution
3
Mismatch of UE information in the
execution of audit between the
ECCB and RLC/MAC
Failure
- IntraEnbFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 273. Collection Time for IntraEnbFail_UpMacFail
eNB
Source Cell
(PDCP/RLC)
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
A mismatch of UE information
occurred in the execution of audit
between the ECCB and MAC.
Failure
- IntraEnbFail_UpMacFail
Call Release
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Appendix B Call Flow
Figure 274. Collection Time for IntraEnbFail_UpRlcFail (1)
eNB
Source Cell
(RLC)
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
Fail Message
Failure
- IntraEnbFail_UpRlcFail
Call Release
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Appendix B Call Flow
Figure 275. Collection Time for IntraEnbFail_UpRlcFail (2)
eNB
Source Cell
(RLC)
UE
ECCB
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
A mismatch of UE information
occurred in the execution of audit
between the ECCB and RLC.
Failure
- IntraEnbFail_UpRlcFail
Call Release
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Appendix B Call Flow
Figure 276. Collection Time for IntraEnbFail_RrcHcTo (1)
eNB
ECCB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Resource Setup
Rrc Connection Reconfiguration
Re-establish control
Execution
3
Timer rrcConnection Reconfig
Rrc Connection Reconfiguration Complete
X
Failure
- IntraEnbFail_RrcHcTo
Call Release
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Appendix B Call Flow
Figure 277. Collection Time for IntraEnbFail_RrcHcTo (2)
eNB
ECCB
Source Cell
UE
Target Cell
UE moves to Intra eNB Cell
Measurement Report
Attempt
Prepare
1
HO Decision
Target Cell
Preparation
2
Resource Setup
Rrc Connection Reconfiguration
Re-establish control
Execution
3
Timer rrcConnection Reconfig
Rrc Connection Reconfiguration Complete
Success Message
X
Failure
- IntraEnbFail_RrcHcTo
Call Release
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Appendix B Call Flow
Figure 278. Collection Time for IntraEnbFail_S1apCuFail
eNB
UE
Source Cell
ECCB
Target Cell
MME
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraEnbFail_RrcHcTo
Call Release
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Appendix B Call Flow
Figure 279. Collection Time for IntraEnbFail_S1apLinkFail (1)
eNB
UE
Source Cell
ECCB
Target Cell
MME
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
S1AP Link is Out Of Service Status
X
Failure
- IntraEnbFail_S1apLinkFail
Call Release
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Appendix B Call Flow
Figure 280. Collection Time for IntraEnbFail_S1apLinkFail (2)
eNB
UE
Source Cell
ECCB
Target Cell
MME
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
SCTB reset
Failure
- IntraEnbFail_S1apLinkFail
Call Release
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Appendix B Call Flow
Figure 281. Collection Time for IntraEnbFail_S1apSigFail (1)
eNB
UE
Source Cell
ECCB
Target Cell
MME
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
S1AP UE CONTEXT
RELEASE COMMAND
Failure
- IntraEnbFail_S1apLinkFail
Call Release
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Appendix B Call Flow
Figure 282. Collection Time for IntraEnbFail_S1apSigFail (2)
eNB
UE
Source Cell
ECCB
Target Cell
MME
UE moves to Intra eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Prepare
Resource Setup
2
Rrc Connection Reconfiguration
Re-establish control
Execution
3
RESET
Failure
-IntraEnbFail_S1apLinkFail
Call Release
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Appendix B Call Flow
S1 In Handover
Figure 283. Collection Time for S1 In Handover
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
Handover Required
Rrc Connection
Reconfiguration
Attempt
1
Prepare
2
Handover Request
Handover Request
Acknowledge
Handover Command
eNB Status Transfer
Rrc Connection Reconfiguration Complete
Success
3
MME Status Transfer
Handover Notify
Tracking Area Update Procedure (NAS)
UE Context Release Command
UE Context Release Complete
Call Release
For inter S1 handover in statistics, when the target eNB receives the S1 Handover
Request message, it is counted as Attempt; when the target eNB transmits the S1
Handover Request Acknowledge message, it is counted as Prepare. The source
eNB transmits the RRC Connection Reconfiguration message to the UE, and the
target eNB receives the RRC Connection Reconfiguration Complete message from
the UE.
Success is counted after the handover is successfully completed and the S1
Handover Notify message is transmitted to the MME. When the procedure from 1
to 2 fails, it is counted as Prepare Fail, returning the cause value. When the
procedure from 2 to 3 fails, it is counted as Inter S1 In Fail, returning the cause
value.
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Appendix B Call Flow
Figure 284. Collection Time for InterS1InPrep_FailCpCcTo
Target eNB
UE
Target eNB
RLC/PDCP/
GTP
ECCB
Source eNB
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Timer Internal Resource Setup
Prepare
2
Failure
- InterS1InPrep_FailCpCcTo
Success Message
X
Handover Failure
Call Release
Figure 285. Collection Time for InterS1InPrep_FailCpCcFail (1)
Target eNB
Source eNB
UE
ECCB
Target eNB
RLC/PDCP/
GTP
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Prepare
2
ECMB reset
Failure
- IntraS1InPrep_FailCpCcFail
Handover Failure
Call Release
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Appendix B Call Flow
Figure 286. Collection Time for InterS1InPrep_FailCpCcFail (2)
Target eNB
Source eNB
UE
ECCB
Target eNB
RLC/PDCP/
GTP
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Prepare
Cell disabled
2
Failure
- IntraS1InPrep_FailCpCcFail
Handover Failure
Call Release
Figure 287. Collection Time for InterS1InPrep_FailCpCcFail (3)
Target eNB
Source eNB
UE
ECCB
Target eNB
RLC/PDCP/
GTP
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Prepare
2
Mismatch of UE information in the
execution of audit between the ECCB
and RLC/MAC
Failure
- IntraS1InPrep_FailCpCcFail Handover Failure
Call Release
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Appendix B Call Flow
Figure 288. Collection Time for InterS1InPrep_FailCpCcFail (4)
Target eNB
Source eNB
UE
Target eNB
RLC/PDCP/
GTP
ECCB
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Target cell resource
allocation Failure
Prepare
Resource Setup
X
Failure
- IntraS1IntPrep_FailCpCcFail
Handover Failure
2
Call Release
Figure 289. Collection Time for InterS1InPrep_FailUpGtpFail
Source eNB
UE
Target eNB
Target eNB
ECCB
GTP
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Fail Message
Prepare
2
Failure
- IntraS1InPrep_FailUpGtpFail
Handover Failure
Call Release
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Appendix B Call Flow
Figure 290. Collection Time for InterS1InPrep_FailUpMacFail
Source eNB
UE
Target eNB
Target eNB
ECCB
MAC
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Fail Message
Prepare
2
Failure
- IntraS1InPrep_FailUpMacFail
Handover Failure
Call Release
Figure 291. Collection Time for InterS1InPrep_FailUpPdcpFail
Source eNB
UE
Target eNB
Target eNB
ECCB
PDCP
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Fail Message
Prepare
2
Failure
- IntraS1InPrep_FailUpPdcpFail
Handover Failure
Call Release
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Appendix B Call Flow
Figure 292. Collection Time for InterS1InPrep_FailUpRlcFail
Source eNB
UE
Target eNB
Target eNB
ECCB
RLC
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
Fail Message
Prepare
2
Failure
- IntraS1InPrep_FailUpRlcFail
Handover Failure
Call Release
Figure 293. Collection Time for InterS1InPrep_FailCpBhCacFail
Target eNB
Source eNB
UE
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
CAC based on Backhaul Bandwidth
Fail
Prepare
2
Failure
- InterS1InPrep_FailCpBhCacFail
Resource Setup
X
Handover Failure
Call Release
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Appendix B Call Flow
Figure 294. Collection Time for InterS1InPrep_FailCpCapaCacFail
Target eNB
ECCB
Source eNB
UE
Target eNB
MAC/RLC/
GTP/PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
Prepare
1
Handover Request
CAC based on Call Count per Cell Fail
or
CAC based on DRB Count per Cell Fail
Failure
- InterS1InPrep_CpCapaCacFail
Resource Setup
X
Handover Failure
2
Call Release
Figure 295. Collection Time for InterS1InPrep_FailCpQosCacFail
Target eNB
Source eNB
UE
ECCB
Target eNB
MAC/RLC/
GTP/PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
CAC based on QoS Fail
Prepare
2
Failure
- InterS1InPrep_CpQosCacFail
Resource Setup
X
Handover Failure
Call Release
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Appendix B Call Flow
Figure 296. Collection Time for InterS1InPrep_FailS1apCuFail
Target eNB
Source eNB
UE
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
S1AP UE CONTEXT RELEASE COMMAND
Prepare
2
Failure
- IntraEnbPrepFail_S1apCuFail
Handover Failure
Call Release
Figure 297. Collection Time for InterS1InPrep_FailS1apLinkFail (1)
Target eNB
Source eNB
UE
ECCB
Target eNB
MAC/RLC/
GTP/PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
S1AP Link is Out Of Service Status
Prepare
X
Failure
- IntraEnbPrepFail_S1apLinkFail
2
Handover Failure
Call Release
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Appendix B Call Flow
Figure 298. Collection Time for InterS1InPrep_FailS1apLinkFail (2)
Target eNB
Source eNB
UE
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
SCTB reset
Prepare
2
Failure
- InterS1InPrep_FailS1apLinkFail
Handover Failure
Call Release
Figure 299. Collection Time for InterS1InPrep_FailS1apSigFail (1)
Target eNB
Source eNB
UE
ECCB
Target eNB
MAC/RLC/
GTP/PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
S1AP UE CONTEXT RELEASE COMMAND
Prepare
2
Failure
- IntraEnbPrepFail_S1apSigFail
Handover Failure
Call Release
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Appendix B Call Flow
Figure 300. Collection Time for InterS1InPrep_FailS1apSigFail (2)
Target eNB
UE
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Handover Request
Resource Setup
RESET
Prepare
2
Failure
- IntraEnbPrepFail_S1apSigFail
Handover Failure
Call Release
Figure 301. Collection Time for InterS1InFail_CpCcTo
Target eNB
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
UE
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Timer InterEnb HoComplete
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
Rrc Connection Reconfiguration Complete
Failure
- InterS1InFail_CpCcTo
X
Call Release
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Appendix B Call Flow
Figure 302. Collection Time for InterS1InFail_CpCcFail (1)
Target eNB
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
UE
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
ECMB reset
Failure
- InterS1InFail_CpCcFail
Call Release
Figure 303. Collection Time for InterS1InFail_CpCcFail (2)
Target eNB
ECCB
Source eNB
UE
Target eNB
MAC/RLC/
GTP/PDCP
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
Cell disabled
Failure
- InterS1InFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 304. Collection Time for InterS1InFail_CpCcFail (3)
Target eNB
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
UE
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
Mismatch of UE information in the
execution of audit between the ECCB and
RLC/MAC
Failure
- InterS1InFail_CpCcFail
Call Release
Figure 305. Collection Time for InterS1InFail_UpPdcpFail
Target eNB
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
UE
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Timer InterEnb HoComplete
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
Rrc Connection Reconfiguration Complete
X
Failure
- InterS1InFail_RrcHcTo
Call Release
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Appendix B Call Flow
Figure 306. Collection Time for InterS1InFail_RrcHcTo
Target eNB
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
UE
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Timer InterEnb HoComplete
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
Rrc Connection Reconfiguration Complete
X
Failure
- InterS1InFail_RrcHcTo
Call Release
Figure 307. Collection Time for InterS1InFail_S1apCuFail
Source eNB
UE
Target eNB
Target eNB
ECCB
PDCP
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
S1AP UE CONTEXT RELEASE COMMAND
Failure
Rrc Connection Reconfiguration Complete - IntraEnbPrepFail_S1apCuFail
Call Release
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Appendix B Call Flow
Figure 308. Collection Time for InterS1InFail_S1apLinkFail (1)
Source eNB
UE
Target eNB
Target eNB
ECCB
PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
S1AP Link is Out Of Service Status
X
Failure
- IntraEnbPrepFail_S1apLinkFail
Call Release
Figure 309. Collection Time for InterS1InFail_S1apLinkFail (2)
Source eNB
UE
Target eNB
Target eNB
ECCB
PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Handover Command
eNB Status Transfer
MME Status Transfer
Execution
3
SCTB reset
Failure
- IntraEnbPrepFail_S1apLinkFail
Rrc Connection Reconfiguration Complete
Call Release
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Appendix B Call Flow
Figure 310. Collection Time for InterS1InFail_S1apSigFail (1)
Source eNB
UE
Target eNB
Target eNB
ECCB
PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraEnbPrepFail_S1apSigFail
Call Release
Figure 311. Collection Time for InterS1InFail_S1apSigFail (2)
Source eNB
UE
Target eNB
Target eNB
ECCB
PDCP
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Rrc Connection
Reconfiguration
Execution
Handover Command
eNB Status Transfer
MME Status Transfer
3
RESET
Failure
- IntraEnbPrepFail_S1apSigFail
Call Release
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Appendix B Call Flow
Figure 312. Collection Time for InterS1InFail_S1apSigTo
Target eNB
Target eNB
MAC/RLC/
GTP/PDCP
ECCB
Source eNB
UE
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
HO Decision
Handover Required
Attempt
1
Prepare
2
Handover Request
Resource Setup
Handover Request Acknowledge
Timer InterEnb HoComplete
Rrc Connection
Reconfiguration
Execution
3
Handover Command
eNB Status Transfer
MME Status Transfer
X
Failure
- InterS1InFail_RrcHcTo
Call Release
S1 Out Handover
Figure 313. Collection Time for S1 Out Handover
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
1
Attempt
Handover Required
Handover Request
2
Handover Request
Acknowledge
Prepare
Handover Command
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure(NAS)
UE Context Release Command
UE Context Release Complete
Call Release
3
Success
For Inter-S1 Handover Out statistics, Attempt is counted when the S1 Handover
Required message can be transmitted to the MME after the inter S1 handover
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Appendix B Call Flow
decision following the Measurement Report message arrival. Prepare is counted
when the S1 Handover Command message is received from the MME. The source
eNB transmits the RRC Connection Reconfiguration message to the UE, and the
target eNB receives the RRC Connection Reconfiguration Complete message from
the UE.
The MME transmits the S1 UE Context Release Command message to the source
eNB when the handover is successfully completed in the target eNB. At this point,
the source eNB is counted as Success. When the procedure from 1 to 2 fails, it is
counted as Prepare Fail and returns the cause value, and when the procedure from
2 to 3 fails, it is counted as Inter-S1 Out Fail and returns the cause value.
Figure 314. Collection Time for InterS1OutPrepFail_CpCcFail (1)
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
2
ECMB reset
Handover Request
Acknowledge
Failure
- IntraS1OutPrepFail_CpCcFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 315. Collection Time for InterS1OutPrepFail_CpCcFail (2)
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
2
Cell disabled
Handover Request
Acknowledge
Failure
- IntraS1OutPrepFail_CpCcFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 316. Collection Time for InterS1OutPrepFail_CpCcFail (3)
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Prepare
2
Mismatch of UE information
in the execution of audit
between the ECCB and RLC/
MAC
Handover Request
Handover Request
Acknowledge
Failure
- IntraS1OutPrepFail_CpCcFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 317. Collection Time for InterS1OutPrepFail_S1apCuFail
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
Handover Request
Acknowledge
2
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraS1OutPrepFail_S1apCpCuFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 318. Collection Time for InterS1OutPrepFail_S1apLinkFail
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
Handover Request
Acknowledge
2
S1AP Link is Out Of Service Status
X
Failure
- InterS1OutPrepFail_S1apLinkFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 319. Collection Time for InterS1OutPrepFail_S1apLinkFail
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
Handover Request
Acknowledge
2
SCTB reset
Failure
- InterS1OutPrepFail_S1apLinkFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 320. Collection Time for InterS1OutPrepFail_S1apRpTo
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
2
Timer relocprep
Handover Request
Acknowledge
Failure
- InterS1OutPrepFail_S1apRpTo
Handover Cancel
Handover Command
RRC Connected
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Appendix B Call Flow
Figure 321. Collection Time for InterS1OutPrepFail_S1apSigFail (1)
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
Handover Request
Acknowledge
2
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraS1OutPrepFail_S1apSigFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 322. Collection Time for InterS1OutPrepFail_S1apSigFail (2)
Source eNB
UE
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
HO Decision
Target Cell
Preparation
Handover Required
Handover Request
Prepare
Handover Request
Acknowledge
2
RESET
Failure
- IntraS1OutPrepFail_S1apSigFail
Handover Command
Call Release
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Appendix B Call Flow
Figure 323. Collection Time for InterS1OutFail_CpCcTo (1)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
Forward PathSetup
Timer Internal ForwardPathSetup
Success Message
Failure
- InterS1OutFail_CpCcTo
X
Execution
3
eNB Status Transfer
MME Status Transfer
Rrc Connection Reconfiguration Complete
Call Release
Figure 324. Collection Time for InterS1OutFail_CpCcTo (2)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
ReestablishControl
Timer Internal ReestablishControl
Success Message
Execution
3
X
Failure
- InterS1OutFail_CpCcTo
eNB Status Transfer
MME Status Transfer
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 325. Collection Time for InterS1OutFail_CpCcTo (3)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
Execution
eNB Status Transfer
3
MME Status Transfer
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
UE Context Release Command
Buffer Flush
Completion
Timer Internal BufferFlush
4
Success Message
Failure
- InterS1OutFail_CpCcTo
X
UE Context Release Complete
Figure 326. Collection Time for InterS1OutFail_CpCcFail (1)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
ECMB reset
Execution
3
Failure
- IntraS1OutPrepFail_CpCcFail
Handover Notify
Rrc Connection Reconfiguration Complete
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 327. Collection Time for InterS1OutFail_CpCcFail (2)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Cell disabled
Execution
3
Failure
- IntraS1OutPrepFail_CpCcFail
Handover Notify
Rrc Connection Reconfiguration Complete
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
Figure 328. Collection Time for InterS1OutFail_CpCcFail (3)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
Execution
3
eNB Status Transfer
Mismatch of UE information
in the execution of audit
between the ECCB and
RLC/MAC
Failure
- IntraS1OutPrepFail_CpCcFail
MME Status Transfer
Handover Notify
Rrc Connection Reconfiguration Complete
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 329. Collection Time for InterS1OutFail_UpGtpFail
UE
Source eNB
Source eNB
GTP
ECCB
Target eNB
MME
S/GW
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
Forward PathSetup
Failure
- InterS1OutFail_UpGtpFail
Fail Message
Execution
3
eNB Status Transfer
MME Status Transfer
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
Figure 330. Collection Time for InterS1OutFail_UpPdcpFail
UE
Source eNB
Source eNB
PDCP
ECCB
Target eNB
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
Handover Exec
Fail Message
Execution
3
Failure
- InterS1OutFail_UpPdcpFail
eNB Status Transfer
Rrc Connection Reconfiguration Complete
MME Status Transfer
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 331. Collection Time for InterS1OutFail_UpRlcFail
UE
Source eNB
Source eNB
RLC
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
Re-establish
Failure
- InterS1OutFail_UpRlcFail
Fail Message
Execution
3
eNB Status Transfer
MME Status Transfer
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
Figure 332. Collection Time for InterS1OutFail_S1apCuFail
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Execution
3
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraS1OutPrepFail_S1apCuFail
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 333. Collection Time for InterS1OutFail_S1apLinkFail (1)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Execution
S1AP Link is Out Of Service Status
X
Failure
- InterS1OutFail_S1apLinkFail
Rrc Connection Reconfiguration Complete
3
Handover Notify
Tracking Area Update Procedure (NAS)
4
Completion
UE Context Release Command
UE Context Release Complete
Figure 334. Collection Time for InterS1OutFail_S1apLinkFail (2)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Execution
3
SCTB reset
Failure
- InterS1OutFail_S1apLinkFail
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 335. Collection Time for InterS1OutFail_S1apRoTo
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Timer RelocOverall
3
Execution
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
4
Completion
UE Context Release Command
Failure
- InterS1OutFail_S1apRoTo
UE Context Release Complete
Figure 336. Collection Time for InterS1OutFail_S1apSigFail (1)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
Execution
3
S1AP UE CONTEXT RELEASE COMMAND
Failure
- IntraS1OutPrepFail_S1apCuFail
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
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Appendix B Call Flow
Figure 337. Collection Time for InterS1OutFail_S1apSigFail (2)
Source eNB
RLC/PDCP/
GTP
UE
Source eNB
ECCB
Target eNB
MME
S/GW
UE moves to Iner eNB Cell
Measurement Report
Attempt
1
Prepare
2
HO Decision
Target Cell
Preparation
Rrc Connection
Reconfiguration
eNB Status Transfer
MME Status Transfer
3
Execution
RESET
Failure
- IntraS1OutPrepFail_S1apCuFail
Rrc Connection Reconfiguration Complete
Handover Notify
Tracking Area Update Procedure (NAS)
Completion
4
UE Context Release Command
UE Context Release Complete
Handover Time
Figure 338. Collection Time for Handover Time (Intra)
UE
eNB
UE moves to Intra eNB Cell
Measurement Report
HO Decision
Rrc Connection Reconfiguration
HO Time
Target Cell
Preparation
Rrc Connection Reconfiguration Complete
Internal Path
Switch
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Appendix B Call Flow
Figure 339. Collection Time for Handover Time (Inter S1)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
Handover Required
Handover Request
Handover Request
Acknowledge
Rrc Connection
Reconfiguration
Handover Command
HO Time
Rrc Connection Reconfiguration Complete
Figure 340. Collection Time for Handover Time (Inter X2)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
Handover Request
Handover Request
Acknowledge
Rrc Connection
Reconfiguration
HO Time
Rrc Connection Reconfiguration Complete
Handover time statistics are based on the Target eNB. Intra handover time refers to
the time taken from transmitting the RRC Connection Reconfiguration message to
the UE until after receiving the RRC Connection Reconfiguration Complete
message. Inter-X2 handover time refers to the time taken from after transmission
of the X2 Handover Request Acknowledge message at the target eNB until
receiving the RRC Connection Reconfiguration Complete message from the UE.
Inter-X2 handover time refers to the time taken from after transmission of the S1
Handover Request Acknowledge message at the Target eNB until receiving the
RRC Connection Reconfiguration Complete message from the UE.
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Appendix B Call Flow
Measurement Results of Source Cell
Figure 341. Collection Time for Measurement Results of Source Cell
UE
Source eNB
Target eNB
MME
S/GW
MME
S/GW
UE moves to Inter eNB Cell
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
Measurement Report
1
- HoTriggeringScellRsrpEventA3[Avg/Min/Max/Tot/Cnt]
- HoTriggeringScellRsrqEventA3[Avg/Min/Max/Tot/Cnt]
- HoTriggeringScellRsrpEventA4[Avg/Min/Max/Tot/Cnt]
- HoTriggeringScellRsrqEventA4[Avg/Min/Max/Tot/Cnt]
- HoTriggeringScellRsrpEventA5[Avg/Min/Max/Tot/Cnt]
- HoTriggeringScellRsrqEventA5[Avg/Min/Max/Tot/Cnt]
Measurement Results of Target Cell
Figure 342. Collection Time for Measurement Report of Target Cell
UE
Source eNB
Target eNB
UE moves to Inter eNB Cell
Rrc Connection Reconfiguration
Rrc Connection Reconfiguration Complete
Measurement Report
1
- HoTriggeringTcellRsrpEventA3[Avg/Min/Max/Tot/Cnt]
- HoTriggeringTcellRsrqEventA3[Avg/Min/Max/Tot/Cnt]
- HoTriggeringTcellRsrpEventA4[Avg/Min/Max/Tot/Cnt]
- HoTriggeringTcellRsrqEventA4[Avg/Min/Max/Tot/Cnt]
- HoTriggeringTcellRsrpEventA5[Avg/Min/Max/Tot/Cnt]
- HoTriggeringTcellRsrqEventA5[Avg/Min/Max/Tot/Cnt]
- HoTriggeringTcellCnt,
- HoTriggeringTcellCid
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Appendix B Call Flow
X2 In Handover
Figure 343. Collection Time for X2 In Handover
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
RLF INDICATION
Measurement Report
HO Decision
Handover Request
Handover Request
Acknowledge
RRC Connection
Reconfiguration
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Path Switch Request
Path Switch Request
Acknowledge
UE Context Release
③ InterX2InSucc
Call Release
For Inter-X2 Handover In statistics, Attempt is counted when the target eNB
receives the X2 Handover Request message, and Prepare is counted after the target
eNB transmits the X2 Handover Request Acknowledge message. The source eNB
(target eNB in case of RLF Triggered Handover) transmits the RRC Connection
Reconfiguration message to the UE, and the target eNB receives the RRC
Connection Reconfiguration Complete message from the UE. Success is counted
when the handover is successfully completed and the X2 UE Context Release
message is transmitted to the source eNB. When the procedure from 1 to 2 fails, it
is counted as Prepare Fail, returning the cause value. When the procedure from 2
to 3 fails, it is counted as Inter-X2 In Fail, returning the cause value.
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Appendix B Call Flow
Figure 344. Collection Time for InterX2InPrepFail_CpCcTo
UE
Target eNB
Source eNB
MAC/RLC/PDCP/GTP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Forward Path Setup
Success Message
X
Case 1.
② Failure
- InterX2InPrepFail_CpCcTo
Setup/Handover
Success Message
X
Case 2.
② Failure
- InterX2InPrepFail_CpCcTo
Handover Preparation Failure
Figure 345. Collection Time for InterX2InPrepFail_CpCcFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
RLF INDICATION
Measurement Report
HO Decision
Handover Request
① InterX2InAtt
Case 1.
ECMB reset
② Failure
- InterX2InPrepFail_CpCcFail
Case 2.
Cell disabled
② Failure
- InterX2InPrepFail_CpCcFail
Case 3.
Mismatch of UE information in the
execution of audit between the
ECCB and RLC/MAC.
② Failure
- InterX2InPrepFail_CpCcFail
Handover Preparation Failure
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Appendix B Call Flow
Figure 346. Collection Time for InterX2InPrepFail_UpGtpFail
UE
Target eNB
Source eNB
GTP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Forward Path Setup
Fail Message
② Failure
- InterX2InPrepFail_UpGtpFail
Handover Preparation Failure
Figure 347. Collection Time for InterX2InPrepFail_UpMacFail
UE
Source eNB
Target eNB
PHY/MAC
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Setup/Handover
Fail Message
② Failure
- InterX2InPrepFail_UpMacFail
Handover Preparation Failure
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Appendix B Call Flow
Figure 348. Collection Time for InterX2InPrepFail_UpPdcpFail
UE
Target eNB
Source eNB
PDCP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Setup/Handover
Fail Message
② Failure
- InterX2InPrepFail_UpPdcpFail
Handover Preparation Failure
Figure 349. Collection Time for InterX2InPrepFail_UpRlcFail
UE
Target eNB
Source eNB
RLC
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Setup/Handover
Fail Message
② Failure
- InterX2InPrepFail_UpRlcFail
Handover Preparation Failure
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Appendix B Call Flow
Figure 350. Collection Time for InterX2InPrepFail_CpBhCacFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
RLF INDICATION
Measurement Report
HO Decision
Handover Request
① InterX2InAtt
Failure by CAC (Call Admission
Control) based on Backhaul
Bandwidth
② Fail
- InterX2InPrepFail_CpBhCacFail
Handover Preparation Failure
Figure 351. Collection Time for InterX2InPrepFail_CpCapaCacFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
RLF INDICATION
Measurement Report
HO Decision
Handover Request
① InterX2InAtt
Failure by CAC (Call Admission
Control) based on Call Count per Cell
or CAC based on DRB Count per Cell
② Fail
- InterX2InPrepFail_CpCapaCacFail
Handover Preparation Failure
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Appendix B Call Flow
Figure 352. Collection Time for InterX2InPrepFail_CpQosCacFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Failure by CAC (Call Admission
Control) based on QoS
② Fail
- InterX2InPrepFail_CpQosCacFail
Handover Preparation Failure
Figure 353. Collection Time for InterX2InPrepFail_S1apLinkFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
Case 1.
① InterX2InAtt
S1AP Link is Out of Service
Status
② Failure
- InterX2InPrepFail_S1apLinkFail
SCTB reset
Case 2.
② Failure
- InterX2InPrepFail_S1apLinkFail
Handover Preparation
Failure
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Appendix B Call Flow
Figure 354. Collection Time for InterX2InPrepFail_S1apSigFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
Case 1.
① InterX2InAtt
S1AP RESET
② Failure
- InterX2InPrepFail_S1apSigFail
Handover Preparation
Failure
Figure 355. Collection Time for InterX2InPrepFail_X2apCuFail
UE
Source eNB
Target eNB
MAC/RLC/PDCP/GTP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Forward Path Setup
Success Message
Setup/Handover
Success Message
Internal Block
Failure
Handover Cancel
② Failure
- InterX2InPrepFail_X2apCuFail
Release Request
Success Message
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Appendix B Call Flow
Figure 356. Collection Time for InterX2InPrepFail_X2apSigFail
UE
Source eNB
Target eNB
MAC/RLC/PDCP/GTP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Forward Path Setup
Success Message
Setup/Handover
Success Message
X2AP Reset
triggering
from ECCB
X2AP RESET REQUEST
② Failure
- InterX2InPrepFail_X2apSigFail
Release Request
Success Message
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Appendix B Call Flow
Figure 357. Collection Time for InterX2InFail_CpCcTo (1)
UE
Target eNB
Source eNB
EPC
GTP
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
RRC Connection
Reconfiguration
Handover Request Acknowledge
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Path Switch Request
S-GW Change
Request
Time out
S-GW Change
Conf
X
Path Switch Request
Acknowledge
③ Failure
- InterX2InFail_CpCcTo
Call Release
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Appendix B Call Flow
Figure 358. Collection Time for InterX2InFail_CpCcTo (2)
UE
Target eNB
Source eNB
EPC
PDCP
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Handover Request Acknowledge
RRC Connection
Reconfiguration
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Handover Complete
Time out
Handover
Complete
Success
X
③ Failure
- InterX2InFail_CpCcTo
Call Release
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Appendix B Call Flow
Figure 359. Collection Time for InterX2InFail_CpCcFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
RRC Connection
Reconfiguration
Handover Request
Handover Request
Acknowledge
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Case 1.
ECMB reset
② Failure
- InterX2InFail_CpCcFail
Case 2.
Cell disabled
② Failure
- InterX2InFail_CpCcFail
Case 3.
Mismatch of UE information in
the execution of audit between
the ECCB and RLC/MAC.
② Failure
- InterX2InFail_CpCcFail
Call Release
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Appendix B Call Flow
Figure 360. Collection Time for InterX2InFail_UpGtpFail
UE
Target eNB
Source eNB
GTP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
Handover Request Acknowledge
② InterX2InPrepSucc
RRC Connection
Reconfiguration
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Path Switch Request
S-GW Change
Request
S-GW Change
Failure
Path Switch Request
Acknowledge
③ Failure
- InterX2InFail_UpGtpFail
Call Release
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Appendix B Call Flow
Figure 361. Collection Time for InterX2InFail_UpPdcpFail
UE
Target eNB
Source eNB
PDCP
EPC
ECCB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
① InterX2InAtt
RRC Connection
Reconfiguration
Handover Request Acknowledge
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Handover Complete
Handover Complete
Failure
③ Failure
- InterX2InFail_UpPdcpFail
Call Release
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Appendix B Call Flow
Figure 362. Collection Time for InterX2InFail_RrcHcTo
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
RRC Connection
Reconfiguration
① InterX2InAtt
Handover Request
Acknowledge
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Time Out
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
X
X
③ Failure
- InterX2InFail_RrcHcTo
③ Failure
- InterX2InFail_RrcHcTo
Call Release
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Appendix B Call Flow
Figure 363. Collection Time for InterX2InFail_S1apLinkFail
UE
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
RRC Connection
Reconfiguration
EPC
MME
SGW
Target eNB
Source eNB
Handover Request
Acknowledge
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
S1AP Link is Out of Service
Status
② Failure
- InterX2InFail_S1apLinkFail
Case 1.
Case 2.
SCTB reset
② Failure
- InterX2InFail_S1apLinkFail
Call Release
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Appendix B Call Flow
Figure 364. Collection Time for InterX2InFail_S1apCuFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
Handover Request
Acknowledge
RRC Connection
Reconfiguration
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Path Switch Request
Path Switch Request
Failure
③ Failure
- InterX2InFail_S1apCuFail
Call Release
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Appendix B Call Flow
Figure 365. Collection Time for InterX2InFail_S1apPathTo
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
Handover Request
Acknowledge
RRC Connection
Reconfiguration
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Path Switch Request
Time Out
Path Switch Request
Acknowledge
X
③ Failure
- InterX2InFail_S1apPathTo
Call Release
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Appendix B Call Flow
Figure 366. Collection Time for InterX2InFail_S1apSigFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
RRC Connection
Reconfiguration
Handover Request
Handover Request
Acknowledge
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Path Switch Request
S1AP RESET
Case 1.
② Failure
- InterX2InPrepFail_S1apSigFail
S1AP UE CONTEXT RELEASE
COMMAND
Case 2.
② Failure
- InterX2InPrepFail_S1apSigFail
Call Release
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Appendix B Call Flow
Figure 367. Collection Time for InterX2InFail_X2apSigFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
RRC Connection
Reconfiguration
Handover Request
Acknowledge
① InterX2InAtt
② InterX2InPrepSucc
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
X2AP Reset
triggering from
ECCB
X2AP RESET REQUEST
③ Failure
- InterX2InFail_X2apSigFail
Call Release
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Appendix B Call Flow
Figure 368. Collection Time for InterX2InFail_X2apSigTo
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement
Report
RLF INDICATION
HO Decision
Handover Request
RRC Connection
Reconfiguration
Handover Request
Acknowledge
SN Status Transfer
Rrc Connection Reestablishment
X
① InterX2InAtt
② InterX2InPrepSucc
Time Out
③ Failure
- InterX2InFail_X2apSigFail
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
③ Failure
- InterX2InFail_X2apSigFail
Call Release
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Appendix B Call Flow
X2 Out Handover
Figure 369. Collection Time for X2 Out Handover
UE
EPC
Target eNB
Source eNB
MME
SGW
RLF INDICATION
Measurement Report
HO Decision
Handover Request
① InterX2OutAtt
Handover Request
Acknowledge
② InterX2OutPrepSucc
RRC Connection
Reconfiguration
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
HO
Execution
RRC Connection Reconfiguration Complete
Path Switch Request
Path Switch Request
Acknowledge
③ InterX2OutSucc
UE Context Release
Call Release
For Inter-X2 Handover Out statistics, Attempt is counted when the X2 Handover
Request message can be transmitted to the target eNB after the Inter-X2 handover
decision following the Measurement Report message arrival or after receiving
RLF Indication due to RLF triggered Handover procedure. Prepare is counted
when the X2 Handover Request Acknowledge message is received from the target
eNB. The source eNB (or target eNB in case of RLF Triggered Handover after
receiving Rrc Connection Reestablishment Complete) transmits the RRC
Connection Reconfiguration message to the UE, and the target eNB receives the
RRC Connection Reconfiguration Complete message from the UE.
The target eNB transmits the X2 UE Context Release message to the source eNB
when the handover is successfully completed. At this point, the source eNB is
counted as Success. When the procedure from 1 to 2 fails, it is counted as Prepare
Fail, returning the cause value.
When the procedure from 2 to 3 fails, it is counted as Inter-X2 Fail, returning the
cause value.
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Appendix B Call Flow
Figure 370. Collection Time for InterX2OutPrepFail_CpCcFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
Case 1.
ECMB reset
② Failure
- InterX2OutPrepFail_CpCcFail
Case 2.
Cell disabled
② Failure
- InterX2OutPrepFail_CpCcFail
Case 3.
Mismatch of UE information in the
execution of audit between the
ECCB and RLC/MAC.
② Failure
- InterX2OutPrepFail_CpCcFail
Handover Request
Acknowledge
Figure 371. Collection Time for InterX2OutPrepFail_S1apLinkFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
① InterX2OutAtt
Handover Request
S1AP Link is Out of Service Status
Case 1.
Case 2.
② Failure
- InterX2OutPrepFail_S1apLinkFail
SCTB reset
② Failure
- InterX2OutPrepFail_S1apLinkFail
Handover Request
Acknowledge
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Appendix B Call Flow
Figure 372. Collection Time for InterX2OutPrepFail_S1apSigFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
S1AP UE CONTEXT RELEASE COMMAND
Case 1.
③ Failure
- InterX2OutPrepFail_S1apSigFail
Case 2.
③ Failure
- InterX2OutPrepFail_S1apSigFail
S1AP RESET
Handover Request
Acknowledge
Figure 373. Collection Time for InterX2OutPrepFail_X2apCuFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
① InterX2OutAtt
Handover Request
Handover Preparation Failure
② Failure
- IntraFreqOutPrepFail_X2apCuFail
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Appendix B Call Flow
Figure 374. Collection Time for InterX2OutPrepFail_X2apRpTo
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
Handover Request
Acknowledge
X
① InterX2OutAtt
Time out
② Fail
- InterX2OutPrepFail_X2apRpTo
Figure 375. Collection Time for InterX2OutFail_CpCcTo
UE
Source eNB
Target eNB
RLC/PDCP/GTP
ECCB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
① InterX2OutAtt
② InterX2OutPrepSucc
Handover Request
Handover Request
Acknowledge
RRC Connection Reconfiguration
Forward Path Setup
Case 1.
Success Message
X
③ Failure
- InterX2OutFail_CpCcTo
Reestablish Control
Case 2.
Success Message
X
③ Failure
- InterX2OutFail_CpCcTo
RRC Connection Reconfiguration Complete
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Appendix B Call Flow
Figure 376. Collection Time for InterX2OutFail_CpCcFail
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
① InterX2OutAtt
② InterX2OutPrepSucc
Handover Request
Handover Request
Acknowledge
RRC Connection
Reconfiguration
SN Status Transfer
Case 1.
ECMB reset
② Failure
- InterX2OutFail_CpCcFail
Case 2.
Cell disabled
② Failure
- InterX2OutFail_CpCcFail
Case 3.
Mismatch of UE information in the
execution of audit between the
ECCB and RLC/MAC.
② Failure
- InterX2OutFail_CpCcFail
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
Case 4. Time Out at
Source eNB for Handover
Completetion
UE Context Release
② Failure
- InterX2OutFail_CpCcFail
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Appendix B Call Flow
Figure 377. Collection Time for InterX2OutFail_UpGtpFail
UE
Source eNB
GTP
Target eNB
ECCB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
Handover Request
Acknowledge
② InterX2OutPrepSucc
RRC Connection Reconfiguration
Forward Path Setup
Fail Message
③ Failure
- InterX2OutFail_UpGtpFail
RRC Connection Reconfiguration Complete
Figure 378. Collection Time for InterX2OutFail_UpMacFail
UE
Source eNB
MAC
Target eNB
ECCB
EPC
MME
SGW
UE moves to Inter eNB Cell
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
Handover Request
Acknowledge
② InterX2OutPrepSucc
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
OutOfSync
③ Failure
- InterX2OutFail_UpMacFail
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
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Appendix B Call Flow
Figure 379. Collection Time for InterX2OutFail_UpPdcpFail
UE
Source eNB
PDCP
Target eNB
ECCB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
Handover Request
Acknowledge
② InterX2OutPrepSucc
RRC Connection Reconfiguration
Handover Exec
Fail Message
③ Failure
- InterX2OutFail_UpPdcpFail
RRC Connection Reconfiguration Complete
Figure 380. Collection Time for InterX2OutFail_UpRlcFail
UE
Source eNB
RLC
Target eNB
ECCB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
Handover Request
Acknowledge
② InterX2OutPrepSucc
RRC Connection Reconfiguration
Re-establish
Fail Message
③ Failure
- InterX2OutFail_UpRlcFail
RRC Connection Reconfiguration Complete
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Appendix B Call Flow
Figure 381. Collection Time for InterX2OutFail_S1apCuFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
① InterX2OutAtt
② InterX2OutPrepSucc
RRC Connection
Reconfiguration
Handover Request
Handover Request
Acknowledge
SN Status Transfer
③ Failure
- InterX2OutFail_S1apCuFail
S1AP UE CONTEXT RELEASE COMMAND
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
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Appendix B Call Flow
Figure 382. Collection Time for InterX2OutFail_S1apLinkFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
①
InterX2OutAtt
② InterX2OutPrepSucc
RRC Connection
Reconfiguration
Handover Request
Handover Request
Acknowledge
SN Status Transfer
S1AP Link is Out of Service Status
Case 1.
Case 2.
③ Failure
- InterX2OutFail_S1apLinkFail
SCTB reset
③ Failure
- InterX2OutFail_S1apLinkFail
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
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Appendix B Call Flow
Figure 383. Collection Time for InterX2OutFail_S1apSigFail
UE
Target eNB
Source eNB
EPC
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
① InterX2OutAtt
② InterX2OutPrepSucc
RRC Connection
Reconfiguration
Handover Request
Handover Request
Acknowledge
SN Status Transfer
S1AP UE CONTEXT RELEASE COMMAND
Case 1.
③ Failure
- InterX2OutFail_S1apSigFail
S1AP RESET
Case 2.
③ Failure
- InterX2OutFail_S1apSigFail
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
RRC Connection Reconfiguration
RRC Connection Reconfiguration Complete
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Appendix B Call Flow
Figure 384. Collection Time for InterX2OutFail_X2apRoTo
UE
EPC
Target eNB
Source eNB
MME
SGW
UE moves to Inter eNB Cell
Measurement Report
RLF INDICATION
HO Decision
Handover Request
① InterX2OutAtt
Handover Request
Acknowledge
② InterX2OutPrepSucc
RRC Connection
Reconfiguration
SN Status Transfer
Rrc Connection Reestablishment
Rrc Connection Reestablishment Complete
Timerout
X2relocOverall
RRC Connection Reconfiguration
HO
Execution
RRC Connection Reconfiguration Complete
Path Switch Request
Path Switch Request
Acknowledge
UE Context Release
X
③ Failure
- InterX2OutFail_X2apRoTo
Call Release
Preemption Handover
Figure 385. Collection Time for Preemption Handover (Intra)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
1
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PreemtIntraEnbAtt
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Appendix B Call Flow
Figure 386. Collection Time for Preemption Handover (Inter X2)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
1
PreemtInterX2OutAtt
Handover Request
Handover Request
Acknowledge
2
PreemtInterX2OutPrepSucc
Rrc Connection
Reconfiguration
SN Status Transfer
Rrc Connection Reconfiguration Complete
Path Switch Request
Path Switch Request
Acknowledge
Release Request
Call Release
3
PreemtInterX2OutSucc
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Appendix B Call Flow
Figure 387. Collection Time for Preemption Handover (Inter S1)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
1
PreemtInterS1OutAtt
Handover Required
Handover Request
Handover Request Acknowledge
2
PreemtInterS1OutPrepSucc
Handover Command
Rrc Connection
Reconfiguration
eNB Status Transfer
Rrc Connection Reconfiguration Complete
MME Status Transfer
Handover Notify
Tracking Area Update Procedure (NAS)
UE Context Release Command
UE Context Release Complete
Call Release
3
PreemtInterS1OutSucc
Preemption Handover per E-RAB
Figure 388. Collection Time for Preemption Handover per E-RAB (Intra)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
CAC Operation
1
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- PreemptHoDropBearerIntra
- PreemptHoBearerIntra
- PreemptHoErabCnt
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Appendix B Call Flow
Figure 389. Collection Time for Preemption Handover per E-RAB (Inter X2)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
Handover Request
CAC Operation
1
- PreemptHoDropBearerInterX2
- PreemptHoBearerInterX2
- PreemptHoErabCnt
Figure 390. Collection Time for Preemption Handover per E-RAB (Inter S1)
UE
Source eNB
Target eNB
MME
S/GW
UE moves to Inter eNB Cell
Measurement Report
HO Decision
Handover Request
Handover Request
1
- PreemptHoDropBearerInterS1
- PreemptHoBearerInterS1
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Handover Req Ack
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Appendix B Call Flow
HO UTRAN
This section provides the statistics data for the handover between the LTE system
and UTRAN system for each cell. The following shows the message flow for the
PS handover procedure from the E-UTRAN to the UTRAN.
Figure 391. PS Handover Procedure from E-UTRAN to UTRAN
UE
Source
eNB
Target
RNS
Downlink/Uplink data
Source
MME
Source
S-GW
Target
SGSN
Target
S-GW
P-GW
Downlink/Uplink data
Downlink/Uplink data
1) Handover Initiation
2) HANDOVER REQUIRED
3) FORWARD RELOCATION REQUEST
4) Create Session Request/Response
5) RELOCATION REQUEST
6) RELOCATION REQUEST ACKNOWLEDGE
7) Create Indirect Data Forwarding Tunnel Request/Response
8) FORWARD RELOCATION RESPONSE
9) Create Indirect Data Forwarding Tunnel Request/Response
10) HANDOVER COMMAND
11) Mobility from E- UTRAN Complete
Indirect data forwarding
Indirect data forwarding
12) HO to UTRAN Complete
13) RELOCATION COMPLETE
14) FORWARD RELOCATION COMPLETE NOTIFICATION
15) FORWARD RELOCATION COMPLETE ACKNOWLEDGE
16) MODIFY BEARER REQUEST
17) Modify Bearer Request/Response
18) MODIFY BEARER Response
Downlink/Uplink data
Downlink/Uplink data
Downlink/Uplink data
19) Routing Area Update procedure
20) S1 Release
21) Delete Session Request/Response
22) Create Indirect Data Forwarding Tunnel Request/Response
23) Create Indirect Data Forwarding Tunnel Request/Response
Step
Description
1)
The source eNB determines the PS handover to the UTRAN. This decision
is made according to the measurement report received from the UE.
2)
The source eNB transmits the HANDOVER REQUIRED message to the
MME.
The source eNB then includes the source RNC to target RNC transparent
container IE information in the message for relaying the necessary
information to the target RNC.
3)-4)
The source MME recognizes the handover from the target ID IE of the
HANDOVER REQUIRED message to the UTRAN and transmits the
FORWARD RELOCATION REQUEST message to the target SGSN. The
target SGSN determines whether to change the S-GW. If change is
required, it carries out the Create Session Request/Response procedure
with a new S-GW.
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Appendix B Call Flow
Step
Description
5)-6)
The target SGSN transmits the RELOCATION REQUEST message to the
target RNC to request resource allocation for the target RNC. The target
RNC performs CAC and resource allocation for each RAB for which
handover is requested, and transmits to the target SGSN the RELOCATION
REQUEST ACKNOWLEDGE message that encapsulates the result. The
RELOCATION REQUEST ACKNOWLEDGE message encapsulates the
Target RNC to Source RNC Transparent Container IE to be transmitted to
the source eNB.
7)-9)
To perform the forwarding tunnel setup, the target SGSN performs the
Create Indirect Data Forwarding Tunnel Request/Response procedure with
target S-GW and transmits the FORWARD RELOCATION RESPONSE
message to the source MME. To perform the forwarding tunnel setup, the
source MME carries out the Create Indirect Data Forwarding Tunnel
Request/Response procedure with the source S-GW.
10)-11)
The source MME transmits the HANDOVER COMMAND message to the
source eNB to complete the handover preparation procedure to the target
UTRAN. The source eNB configures the MOBILITY FROM E-UTRAN
COMMAND containing the Target RNC to Source RNC Transparent
Container IE in the HANDOVER COMMAND message and transmits it to
the UE to request the PS handover to the UTRAN.
12)
The UE performs synchronization with the target UTRAN and connects to
the target cell via the RACH.
After UE is successfully connected to the target cell, UE transmits the
HANDOVER TO UTRAN COMPLETE message to the target UTRAN to
complete the handover procedure.
13)-15)
The target RNC transmits the RELOCATION COMPLETE message to the
target SGSN to notify that the handover procedure from the UE to the
UTRAN has been completed successfully.
The target SGSN transmits the FORWARD RELOCATION COMPLETE
NOTIFICATION message to the source MME. At this time, the source MME
operates the waiting timer for releasing the resource of the E-UTRAN and
transmits the FORWARD RELOCATION COMPLETE ACKNOWLEDGE
response message to the target SGSN. The target SGSN operates the
waiting timer for releasing the forwarding tunnel at the time when the source
MME receives the response message.
16)-18)
The target SGSN transmits the Modify Bearer Request message for each
PDN connection to the target S-GW. Subsequent downlink packets are then
transmitted from the S-GW to the target RNC. The target S-GW performs
the Modify Bearer Request/Response procedure with the P-GW and
transmits the Modify Bearer Response message to the target SGSN.
19)
When UE satisfies the conditions specified in section 5.5.2.1 of TS 23.401,
the Routing Area Update procedure starts.
20)-23)
When the timer at Step 14) expires, the source MME requests the source
eNB and the source S-GW to release the resources. When the timer at Step
15) expires, the target SGSN releases the resources release allocated for
forwarding tunnel with the target S-GW.
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