LTE Performance Parameters
Contents
1 Uplink Resource Allocation ........................................................................................................ 5
1.1 SRS Resource Allocation ................................................................................................................................. 5
1.1.1 SrsSubframeCfg (SRS subframe configuration) ..................................................................................... 5
1.1.2 SrsSubframeRecfSwitch (SRS subframe tree reconfiguration switch) ................................................... 6
1.1.3 AnSrsSimuTrans (SRS ACK/NACK simultaneous transmission) .......................................................... 6
1.2 Uplink Scheduling ............................................................................................................................................ 7
1.2.1 Scheduling in Each TTI .......................................................................................................................... 7
1.2.2 Physical Layer Measurement Result Processing ................................................................................... 10
2 Downlink Resource Allocation ................................................................................................ 12
2.1 PUCCH Resource Allocation ......................................................................................................................... 12
2.1.1 DeltaShift (Delta Shift) ......................................................................................................................... 12
2.1.2 SriAdaptiveSwitch (SRI adaptive switch) ............................................................................................. 13
2.1.3 FixedSriPeriod (SRI Period) ................................................................................................................. 13
2.1.4 PucchSwitch (PUCCH algorithm switch) ............................................................................................. 14
2.1.5 SriLowLoadThd (SRI Low Load Threshold) ........................................................................................ 15
2.2 Downlink CQI Adjustment............................................................................................................................. 16
2.2.1 CqiAdjAlgoSwitch (CQI adjust algorithm switch) ............................................................................... 16
2.3 Downlink Scheduling ..................................................................................................................................... 16
2.3.1 DlschPriorityFactor (Downlink scheduling priority factor) .................................................................. 16
2.3.2 DlMinGbr (Downlink MinGBR) .......................................................................................................... 17
2.3.3 DlschStrategy (Downlink scheduling Strategy) .................................................................................... 18
2.3.4 BtServiceWeight (Bt Service Weight) ................................................................................................... 18
2.3.5 OtherServiceWeight (Other Service Weight) ........................................................................................ 19
2.4 PDCCH Resource Allocation ......................................................................................................................... 20
2.4.1 CCEUseRatio (CCE use ratio) .............................................................................................................. 20
3 Downlink ICIC ............................................................................................................................ 22
3.1 DlIcicSwitch (DlIcic algorithm switch) ......................................................................................................... 22
3.2 BandMode (Downlink band division scheme) ............................................................................................... 22
3.3 A3Offset (Downlink ICIC A3 offset) ............................................................................................................. 23
3.4 Hysteresis (DownLink ICIC measurement hysteresis) .................................................................................. 24
3.5 TimeToTrigger (DownLink ICIC measurement time to trigger) .................................................................... 24
3.6 MaxReportCellNum (Downlink ICIC measurement max report cell number) .............................................. 25
3.7 ReportInterval (Downlink ICIC measurement report interval) ...................................................................... 26
3.8 ReportAmount (Downlink ICIC measurement report amount) ...................................................................... 26
3.9 TriggerQuantity (DownLink ICIC measurement trigger quantity)................................................................. 27
3.10 ReportQuantity (DownLink ICIC measurement report quantity)................................................................. 28
4 Downlink MIMO ........................................................................................................................ 29
4.1 MIMOADAPTIVESWITCH (MIMO adaptive switch) ................................................................................. 29
4.2 FIXEDMIMOMODE (Fixed MIMO mode) .................................................................................................. 29
4.3 MAXMIMORANKPARA (maximum number of MIMO layers) .................................................................. 30
5 Mobility Control ......................................................................................................................... 31
5.1 Intra-RAT Handover ....................................................................................................................................... 31
5.1.1 Handover Algorithm Switch ................................................................................................................. 31
5.1.2 Intra-RAT Handover Common Parameter ............................................................................................. 35
5.1.3 Intra-Frequency Handover .................................................................................................................... 37
5.1.4 Measurement-Related Parameters ......................................................................................................... 44
5.2 Cell Reselection Parameters ........................................................................................................................... 46
5.2.1 QRxLevMin (Minimum required RX level) ......................................................................................... 46
5.2.2 QRxLevMinOffset (Minimum required RX level offset) ..................................................................... 46
5.2.3 QQualMin (Minimum required RX quality level) ................................................................................ 47
5.2.4 QQualMinOffset (Minimum required RX quality level offset) ............................................................ 48
5.2.5 SIntraSearch (Threshold for intra frequency measurements) ................................................................ 48
5.2.6 ThrshServLow (Serving frequency lower priority threshold) ............................................................... 49
5.2.7 SNonIntraSearch (Threshold for EUTRAN inter-frequency and inter-RAT measurements) ................ 50
5.2.8 SIntraSearchQ (RSRQ Threshold for intra frequency measurements).................................................. 51
5.2.9 CellReselPriority (Cell reselection priority) ......................................................................................... 51
5.2.10 QRxLevMin (Minimum required RX level) ....................................................................................... 52
5.2.11 QqualMin (Minimum RX signal quality) ............................................................................................ 53
5.2.12 MeasBandWidth (Measurement bandwidth) ....................................................................................... 53
5.2.13 CellQoffset (Cell offset) ...................................................................................................................... 54
5.2.14 QoffsetFreq (Frequency offset) ........................................................................................................... 55
5.2.15 Qhyst (Hysteresis value for ranking criteria) ...................................................................................... 55
5.2.16 TReselEutran (Cell reselection timer value for EUTRAN) ................................................................. 56
5.2.17 PMax (Max transmit power allowed) in CellResel ............................................................................. 57
5.2.18 TreselectionHrpd (Cell reselection timer for HRPD) .......................................................................... 58
6 Load Control................................................................................................................................. 59
6.1 Load Control Algorithm ................................................................................................................................. 59
6.1.1 UlLdcSwitch (Switch for the Uplink Load Control Algorithm) ........................................................... 59
6.1.2 DlLdcSwitch (Switch for the Downlink Load Control Algorithm) ....................................................... 60
6.2 Admission Control ......................................................................................................................................... 60
6.2.1 GbrUsageSwitch (Switch for Detecting the Number of PRBs Occupied by GBR Services) ................ 60
6.2.2 GbrRbUsedHighThd (GBR used resource high proportion threshold) ................................................. 61
6.2.3 GbrRbUsedLowThd (GBR used resource low proportion threshold) ................................................... 62
6.2.4 DlRbLowThd (Downlink RB used ratio low threshold) ....................................................................... 62
6.2.5 DlRbHighThd (Downlink RB used ratio high threshold) ..................................................................... 63
6.2.6 UlRbLowThd (Uplink RB used ratio low threshold) ............................................................................ 64
6.2.7 UlRbHighThd (Uplink RB used ratio high threshold) .......................................................................... 64
6.2.8 MaxNonGBRBearerNum (Non-GBR max bearer number) .................................................................. 65
6.3 Random Access Control ................................................................................................................................. 66
6.3.1 RootSequenceIdx (Root sequence index) ............................................................................................. 66
6.3.2 PreambleFmt (Preamble format) ........................................................................................................... 66
6.3.3 HighSpeedFlag (High speed flag) ......................................................................................................... 67
6.4 Mapping from SIBs to SI Messages ............................................................................................................... 67
6.4.1 SiMapSwitch (SIB mapping SI algorithm switch) ................................................................................ 67
6.4.2 Sib2Period (SIB2 period) ...................................................................................................................... 68
6.4.3 Sib3Period (SIB3 period) ...................................................................................................................... 69
6.4.4 Sib4Period (SIB4 period) ...................................................................................................................... 70
6.4.5 Sib5Period (SIB5 period) ...................................................................................................................... 70
6.4.6 Sib6Period (SIB6 period) ...................................................................................................................... 71
6.4.7 Sib7Period (SIB7 period) ...................................................................................................................... 72
6.4.8 Sib8Period (SIB8 period) ...................................................................................................................... 72
6.4.9 Sib10Period (SIB10 period) .................................................................................................................. 73
6.4.10 Sib11Period (SIB11 period) ................................................................................................................ 73
7 Power Control .............................................................................................................................. 75
7.1 Uplink Power Control .................................................................................................................................... 75
7.1.1 PUSCH.................................................................................................................................................. 75
7.1.2 PUCCH ................................................................................................................................................. 77
7.1.3 PRACH ................................................................................................................................................. 78
7.2 Downlink Power Control ............................................................................................................................... 80
7.2.1 PDSCH.................................................................................................................................................. 80
7.2.2 PDCCH ................................................................................................................................................. 86
7.2.3 PHICH .................................................................................................................................................. 87
7.2.4 PCFICH ................................................................................................................................................ 89
7.2.5 PBCH .................................................................................................................................................... 89
7.2.6 SCH....................................................................................................................................................... 90
7.2.7 PRS ....................................................................................................................................................... 91
A Acronyms and Abbreviations .................................................................................................. 93
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1
Uplink Resource Allocation
1.1 SRS Resource Allocation
1.1.1 SrsSubframeCfg (SRS subframe configuration)
Description
Meaning: This parameter indicates the index for initial cell-level SRS subframe configuration.
Value type: enumeration
Value range: SC0(0), SC1(1), SC2(2), SC3(3), SC4(4), SC5(5), SC6(6), SC7(7), SC8(8),
SC9(9), SC10(10), SC11(11), SC12(12), SC13(13), SC14(14)
Adjustment step: N/A
Unit: none
Default value: SC3(3) for FDD, SC0(0) for TDD
Parameter relationship: none
Impact scope: cell
Setting
The protocol specifies that the number of subframe trees is configurable within a 10-ms
measurement period. If the number of UEs is small, a small amount of cell-level SRS
subframe resources is configured. This reduces the usage of PUSCH resources.
If the cell load is light, a small and fixed amount of cell-level SRS resources can be
configured. The current algorithm supports adaptive configuration of cell-level subframes.
For example, the subframes can be configured every 2 or 5 milliseconds as required.
This parameter affects the configuration of cell-level SRS subframes. If the number of
configured cell-level subframes increases, the uplink cell throughput decreases.
Related Commands
LST SRSCFG
MOD SRSCFG: LocalCellId=x, SrsSubframeCfg=x;
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1.1.2 SrsSubframeRecfSwitch (SRS subframe tree reconfiguration
switch)
Description
Meaning: This parameter indicates whether the function of reconfiguring cell-level subframe
trees is enabled. If this parameter is set to ON, the number of cell-level SRS subframes
adjusts adaptively based on the cell load. If this parameter is set to OFF, the cell-level SRS
subframe configuration is fixed.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: on
Parameter relationship: none
Impact scope: cell
Setting
This parameter is set to ON by default. If this parameter is set to OFF, cell-level SRS
subframes cannot be reconfigured. As a result, SRS resources are unavailable to UEs that
newly accessed the network.
Related Commands
LST CELLALGOSWITCH
MOD CELLALGOSWITCH: LocalCellId=x, SrsAlgoSwitch=SrsSubframeRecfSwitch-x;
1.1.3 AnSrsSimuTrans (SRS ACK/NACK simultaneous
transmission)
Description
Meaning: This parameter indicates whether the SRS and ACK/NACK (AN) or scheduling
request (SR) can be transmitted in the same transmission time interval (TTI).
Value type: bool
Value range: BOOLEAN_FALSE(False), BOOLEAN_TRUE(True)
Adjustment step: N/A
Unit: none
Default value: BOOLEAN_TRUE(True)
Parameter relationship: none
Impact scope: cell
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Setting
If this parameter is set to BOOLEAN_TRUE, the AN or SR is truncated, and the SRS and
AN or SR can be transmitted in the same TTI. If this parameter is set to BOOLEAN_FALSE,
the AN or SR is not truncated, and the SRS is discarded if the SRS and AN or SR are
transmitted in the same TTI.
This parameter is set to BOOLEAN_TRUE by default. This parameter can be set to
BOOLEAN_FALSE to ensure AN or SR performance if the PUCCH demodulation
performance cannot meet requirements.
If this parameter is set to BOOLEAN_TRUE, the AN or SR demodulation performance may
be affected. If this parameter is set to BOOLEAN_FALSE, timeout may occur.
Related Commands
LST SRSCFG
MOD SRSCFG: LocalCellId=x, AnSrsSimuTrans=x;
1.2 Uplink Scheduling
1.2.1 Scheduling in Each TTI
1.2.1.1 UlschStrategy (Uplink Scheduling Strategy)
Description
Meaning: This parameter indicates the uplink scheduling policy that determines the
scheduling priority and the scheduling order in which UEs are arranged on the uplink. There
are four uplink scheduling policies: MAX C/I, proportional fair (PF), round robin (RR), and
enhanced proportional fair (EPF).
Value type: enumeration
Value range: ULSCH_STRATEGY_EPF(EPF), ULSCH_STRATEGY_MAX_CI(MAX_CI),
ULSCH_STRATEGY_PF(PF), ULSCH_STRATEGY_RR(RR)
Adjustment step: N/A
Unit: none
Default value: ULSCH_STRATEGY_EPF(EPF)
Parameter relationship: none
Impact scope: cell
Setting
If the Max C/I scheduling policy is used, UEs for which channel quality is good are scheduled
first. The spectral efficiency improves but the quality of service (QoS) and fairness cannot be
ensured. The Max C/I scheduling policy can be used to verify the maximum system capacity.
The RR scheduling policy ensures fairness but lowers the system capacity. This scheduling
policy can be used to verify the upper threshold of system scheduling fairness. The PF
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scheduling policy balances between spectral efficiency and fairness. This scheduling policy
can be used to verify the system capacity, coverage, and fairness. In the EPF scheduling
policy, the QoS, system capacity, and frequency selection are balanced. The basic scheduling
policies MAX C/I, PF, and RR are used in performance tests. The EPF scheduling policy is
intended for commercial use.
Impact of parameter setting on network performance: If this parameter is set to
ULSCH_STRATEGY_EPF, the QoS is guaranteed, and the coverage, capacity, and fairness
are balanced. If this parameter is set to ULSCH_STRATEGY_MAX_CI, the system
capacity is maximized, but the coverage, fairness, and QoS are not ensured. If this parameter
is set to ULSCH_STRATEGY_PF, a tradeoff among the coverage, capacity, and fairness is
reached, but the QoS is not guaranteed. If this parameter is set to ULSCH_STRATEGY_RR,
the eNodeB ensures that each UE has an equal opportunity to be scheduled on the uplink, but
the capacity, coverage, and QoS are not ensured.
Related Commands
LST CELLULSCHALGO
MOD CELLULSCHALGO: LocalCellId=x, UlschStrategy=ULSCH_STRATEGY_x;
1.2.1.2 PreAllocationSwitch (Pre-Allocation Switch)
Description
Meaning: This parameter indicates whether the pre-allocation algorithm is enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: on
Parameter relationship: none
Impact scope: cell
Setting
The pre-allocation algorithm can reduce the end-to-end service latency when the uplink load
is light. No resource is available for pre-allocation when the uplink load is heavy.
Parameter adjustment scenario:
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This parameter can be set to ON to decrease the end-to-end service latency.
This parameter can be set to OFF to maintain the UE standby time during pre-allocation.
This parameter can be set to OFF to clear the interference caused by pre-allocation.
Impact of parameter setting on network performance: Setting this parameter to ON reduces
the probability of UE entering the DRX state, shortens the UE standby time, and increases
interference with neighboring cells.
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Related Commands
LST CELLALGOSWITCH:
MOD CELLALGOSWITCH: LocalCellId=x, UlSchSwitch=PreAllocationSwitch-x;
1.2.1.3 PreAllocationMinPeriod (minimal period of pre-allocation)
Description
Meaning: This parameter indicates the minimum interval between pre-allocations. The
interval between pre-allocations of one UE must be longer than or equal to the value of this
parameter. If this parameter is set to 1, a UE is pre-allocated in every TTI.
Value type: integer
Value range: 1 to 10
Adjustment step: 1
Unit: ms
Default value: 5
Parameter relationship: This parameter is valid only when PreAllocationSwitch is set to ON.
Impact scope: cell
Setting
This parameter is used to control the impact of pre-allocation on UE standby time. Increasing
the value of this parameter reduces the number of times UEs can be pre-allocated and
increases the UE standby time. Decreasing the value of this parameter increases the number of
times UEs can be pre-allocated and reduces the UE standby time.
Parameter adjustment scenario:
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If a decrease in the pre-allocation interval is required, you are advised to decrease the
value of this parameter.
If an increase in the UE standby time is required, you are advised to increase the value of
this parameter.
Related Commands
LST CELLULSCHALGO
MOD CELLULSCHALGO: LocalCellId=x, PreAllocationMinPeriod =x;
1.2.1.4 PreAllocationSize (data size of pre-allocation)
Description
Meaning: This parameter indicates the data amount pre-allocated to each UE.
Value type: integer
Value range: 45 to 1500
Adjustment step: 1
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Unit: byte
Default value: 80
Parameter relationship: This parameter is valid only when PreAllocationSwitch is set to ON.
Impact scope: cell
Setting
This parameter determines the amount of bandwidth resources pre-allocated to UEs based on
an estimated amount of service data. If the data amount specified by this parameter matches
the service type, there is a low probability that the data is fragmented at the Media Access
Control (MAC) layer. As a result, the service latency is short. If the data amount specified by
this parameter is less than the actual amount of data to be transmitted, there is a high
probability that the data is fragmented at the MAC layer. As a result, the service latency is
long. If the data amount specified by this parameter is greater than the actual amount of data
to be transmitted, resources are wasted and interference increases.
Parameter adjustment scenario:
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
If the end-to-end latency is long, you are advised to increase the value of this parameter.
If the transmitted data is less than the pre-allocated data amount, you are advised to
decrease the value of this parameter until the pre-allocated data amount is equal to the
transmitted data amount.
Related Commands
LST CELLULSCHALGO
1.2.2 Physical Layer Measurement Result Processing
1.2.2.1 SinrAdjustSwitch (SINR adjust switch)
Description
Meaning: This parameter indicates whether the eNodeB adjusts the SINR based on the
ACK/NACK message received when HARQ is enabled on the uplink.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Parameter relationship: none
Impact scope: cell
Setting
Due to inaccurate channel evaluation, inaccurate SINR measurement, or delays, the actual
channel conditions may not be suitable for the UE MCS and the measured IBLER is higher
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than the target IBLER. The eNodeB uses the SINR adjustment algorithm to counteract the
measurement error.
Related Commands
LST CELLALGOSWITCH
MOD CELLALGOSWITCH: LocalCellId=x, UlSchSwitch=SinrAdjustSwitch-x;
1.2.2.2 SinrAdjustTargetIbler (SINR target IBLER adjustment)
Description
Meaning: This parameter indicates the target IBLER for the SINR adjustment algorithm.
Value type: double
Value range: 1 to 99
Adjustment step: N/A
Unit: %
Default value: 10
Parameter relationship: none
Impact scope: cell
Setting
On the physical layer, the IBLER decides the SINR threshold for MCS switches, which is
10% by default. On the data link layer, the SINR adjustment increases with the IBLER.
Due to the diversity combination gains, if the SINR adjustment step is large, a high-order
MCS is used and system throughout increases.
Parameter adjustment scenario: This parameter must set to maximize the system throughput
when HARQ and uplink SINR adjustment are enabled.
Impact of parameter setting on network performance: This parameter is set to achieve a
balance between the initial MCS order and the number of retransmissions. The setting of this
parameter affects cell throughput.
Related Commands
LST CELLULSCHALGO
MOD CELLULSCHALGO: LocalCellId=x, SinrAdjustTargetIbler=x;
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2
Downlink Resource Allocation
2.1 PUCCH Resource Allocation
2.1.1 DeltaShift (Delta Shift)
Description
Meaning: This parameter indicates the cyclic shift offset between two ACK or scheduling
request indication (SRI) cord channels that use the same orthogonal cover (OC) code.
Value type: enumeration
Value range: DS1_DELTA_SHIFT(ds1), DS2_DELTA_SHIFT(ds2),
DS3_DELTA_SHIFT(ds3)
Unit: none
Default value: none
Setting
Recommended value:




Set this parameter to DS2_DELTA_SHIFT(ds2) for a cell configured with the normal
cyclic prefix (CP) when the LBBPc is used.
Set this parameter to DS3_DELTA_SHIFT(ds3) for a cell configured with the extended
CP when the LBBPc is used.
Set this parameter to DS1_DELTA_SHIFT(ds1) for a cell configured with the normal CP
when the LBBPd is used.
Set this parameter to DS3_DELTA_SHIFT(ds3) for a cell configured with the extended
CP when the LBBPd is used.
Increasing the value of this parameter reduces the maximum number of ACK or SRI UEs that
an RB supports for multiplexing and reduces the PUCCH capacity. If this parameter is set to a
small value, the ACK or the SRI code channels may not be orthogonal.
Related Commands
LST PUCCHCFG
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MOD PUCCHCFG: LocalCellId=x, DeltaShift=DSX_DELTA_SHIFT;
2.1.2 SriAdaptiveSwitch (SRI adaptive switch)
Description
Meaning: This parameter indicates whether SRI periodic adjustment is enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Parameter relationship: none
Impact scope: eNodeB
Recommended value: ON
Setting
If this parameter is set to ON, the maximum number of SRI UEs supported in a cell increases
without using more uplink control signaling resources or increasing the number of ACK or
SRI cord channels. However, the average uplink scheduling delay increases when the PUCCH
is heavily loaded. If this parameter is set to OFF and the number of ACK or SRI code channel
remains unchanged, the maximum number of SRI UEs supported in a cell decreases.
If SRI periodic adjustment is enabled and the PUCCH is heavily loaded, more UEs can be
allocated SRI resources for network access.
Related Commands
LST GLOBALPROCSWITCH;
MOD GLOBALPROCSWITCH: SriAdaptiveSwitch=x;
2.1.3 FixedSriPeriod (SRI Period)
Description
Meaning: This parameter indicates the period of SRI.
Value type: enumeration
Value range: ms5, ms10, ms20, ms40
Adjustment step: N/A
Unit: ms
Default value: ms10
Parameter relationship: none
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Impact scope: eNodeB
Recommended value: If UEs are on an ultra-high speed train, set this parameter to ms10. For
other scenarios, set the parameter based on the QCI of services. If the configuration of TDD
uplink and downlink subframe ratio is 0 or 1, set this parameter to ms5 for services with QCI3
or QCI5; ms10 for services with QCI1, QCI2 or QCI7; 20ms for services with QCI4, QCI6,
QCI8, or QCI9.
Setting
Increasing the value of this parameter increases the average SRI period for UEs and the
maximum number of SRI UEs supported in a cell. However, the average uplink scheduling
delay may increase. Decreasing the value of this parameter reduces the maximum number of
SRI UEs supported in a cell.
Related Commands
LST CELLSTANDARDQCI
MOD CELLSTANDARDQCI: SriPeriod=x;
2.1.4 PucchSwitch (PUCCH algorithm switch)
Description
Meaning: This parameter indicates whether self-adaptive PUCCH resource adjustment is
enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Parameter relationship: none
Impact scope: cell
Recommended value: You are advised to set this parameter to OFF for UEs on ultra-high
speed trains. In other scenarios, set this parameter to ON.
Setting
If this parameter is set to ON, PUCCH resource increases or decreases self-adaptively based
on the load on the PUCCH, optimizing PUCCH resource utilization and reducing uplink
control signaling overhead. However, when PUCCH resource decreases, the eNodeB may
need to reallocate PUCCH resources to a few UEs, using more downlink resources. If this
parameter is set to OFF, uplink control signaling overhead increases.
Related Commands
LST CELLALGOSWITCH;
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MOD CELLALGOSWITCH: PucchAlgoSwitch=PucchSwitch-x;
2.1.5 SriLowLoadThd (SRI Low Load Threshold)
Description
Meaning: This parameter indicates the threshold for entering the low load state of SRI
resources.
Value type: integer
Value range: 0 to 50
Adjustment step: 1
Unit: none
Default value: 10
Parameter relationship: none
Impact scope: cell
Recommended value:



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

In FDD mode with the bandwidth of 1.4 MHz or 3 MHz, set this parameter to 0.
In FDD mode with the bandwidth of 5 MHz or 10 MHz, set this parameter to 10.
In FDD mode with the bandwidth of 15 MHz or 20 MHz, set this parameter to 20.
In TDD mode with the bandwidth of 1.4 MHz or 3 MHz, set this parameter to 0.
In TDD mode with the bandwidth of 5 MHz or 10 MHz, set this parameter to 10.
In TDD mode with the bandwidth of 15 MHz or 20 MHz, set this parameter to 20.
Setting
You are advised to retain the default value of the parameter. If adjustments are inevitable, do
not set this parameter to a value much greater than the default value, because this may lead to
incorrect decisions on the load status of SRI resources. The recommended maximum value of
this parameter is 20 if the downlink bandwidth is less than 10 MHz and 40 for other
bandwidths.
Increasing the value of this parameter reduces the SRI resources in a cell. Decreasing the
value of this parameter increases the SRI resources of a cell.
Related Commands
LST CELLPUCCHALGO;
MOD CELLPUCCHALGO: LocalCellId=x, SriLowLoadThd=x;
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2.2 Downlink CQI Adjustment
2.2.1 CqiAdjAlgoSwitch (CQI adjust algorithm switch)
Description
Meaning: This parameter indicates whether the eNodeB is allowed to adjust the UE-reported
CQIs based on the IBLER.
Value type: enumeration
Value range: ON, OFF
Unit: none
Default value: ON
Parameter relationship: none
Impact scope: cell
Setting
If this parameter is set to ON, the IBLER of a UE is maintained around the target value and
the system throughout is optimized. If this parameter is set to OFF, the IBLER of a UE may
be much higher than the target value and the system throughout cannot be optimized.
Related Commands
LST CELLALGOSWITCH
MOD CELLALGOSWITCH: LocalCellId=x,
CqiAdjAlgoSwitch=CqiAdjAlgoSwitch-x&StepVarySwitch-0;
2.3 Downlink Scheduling
2.3.1 DlschPriorityFactor (Downlink scheduling priority factor)
Description
Meaning: This parameter indicates the weight factor used in the calculation of connection
priorities during downlink scheduling.
Value type: interval
Value range: 0 to 1000
Unit: 0.001
Default value: none



  QCI 9
Parameter relationship: This parameter must be set to a value that ensures the following
QCI 7
QCI 8
condition is met: QCI 6
QCI6, QCI7, QCI8, and QCI9 services.
. In addition, this parameter is valid for
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Impact scope: eNodeB
Setting
Recommended value: 1000 for QCI6; 900 for QCI7; 800 for QCI8; 700 for QCI9
The value of this parameter is an important factor in determining the scheduling priority of a
UE and the amount of physical resources that the eNodeB allocates to a UE in a period of
time. Increasing the value of this parameter enhances the scheduling priority of and increases
the amount of RB resources allocated for QCIx services. Decreasing the value of this
parameter lowers the scheduling priority of and reduces the amount of RB resources allocated
for QCIx services.
Related Commands
LST STANDARDQCI
MOD STANDARDQCI: Qci=QCIx, DlschPriorityFactor=x;
2.3.2 DlMinGbr (Downlink MinGBR)
Description
Meaning: This parameter indicates the minimum data rate for QCIx non-GBR services. This
parameter is used to guarantee that non-GBR services can be scheduled even in network
congestion.
Value type: enumeration
Value range: MinGbrRate_0_KB, MinGbrRate_1_KB, MinGbrRate_2_KB,
MinGbrRate_4_KB, MinGbrRate_8_KB, MinGbrRate_16_KB, MinGbrRate_32_KB,
MinGbrRate_64_KB, MinGbrRate_128_KB, MinGbrRate_256_KB, MinGbrRate_512_KB
Unit: kbyte/s
Default value: MinGbrRate_1_KB
Parameter relationship: The minimum data rate guaranteed for non-GBR services equals to
that for GBR services. The scheduling of both non-GBR services and GBR services must be
guaranteed. Therefore, this parameter must not be set too large. In addition, this parameter is
valid for QCI6, QCI7, QCI8, and QCI9 services.
Impact scope: eNodeB
Setting
Increasing the value of this parameter increases the minimum data rate of QCIx services.
Decreasing the value of this parameter reduces the minimum data rate of QCIx services.
Related Commands
LST STANDARDQCI
MOD STANDARDQCI: Qci=QCIx, DlMinGbr=x;
[键入文字]
2.3.3 DlschStrategy (Downlink scheduling Strategy)
Description
Meaning: This parameter indicates the downlink scheduling type.
Value type: enumeration
Value range:
DLSCH_PRI_TYPE_EPF, DLSCH_PRI_TYPE_PF, DLSCH_PRI_TYPE_MAX_CI,
DLSCH_PRI_TYPE_RR
Unit: none
Default value: DLSCH_PRI_TYPE_EPF
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set to DLSCH_PRI_TYPE_PF, the proportional fair algorithm is
implemented and the channel quality and fairness are balanced in scheduling.
If this parameter is set to DLSCH_PRI_TYPE_MAX_CI, the Max C/I algorithm is
implemented and UEs with optimal channel quality are preferentially scheduled.
If this parameter is set to DLSCH_PRI_TYPE_RR, the round robin algorithm is
implemented and UEs in a cell are scheduled in turns.
The preceding scheduling policies are implemented regardless of UE QoS configuration.
If this parameter is set to DLSCH_PRI_TYPE_EPF, the proportional fair algorithm is
implemented with the QoS of services taken into consideration.
Related Commands
LST CELLDLSCHALGO;
MOD CELLDLSCHALGO: LocalCellId=x, DlschStrategy=x;
2.3.4 BtServiceWeight (Bt Service Weight)
Description
Meaning: This parameter indicates the weighting factor for BT services when DlschStrategy
is set to DLSCH_PRI_TYPE_EPF.
Value type: interval
Value range: 0 to 100
Unit: 0.01
Default value: 1
[键入文字]
Parameter relationship: The value of this parameter must not be greater than the value of
OtherServiceWeight.
Impact scope: cell
Setting
The value of this parameter is an important factor in determining the scheduling priority of a
UE and the amount of physical resources that the eNodeB allocates to a UE. Increasing the
value of this parameter enhances the scheduling priority of and increases the amount of RB
resources allocated to BT services. Decreasing the value of this parameter lowers the
scheduling priority of and reduces the amount of RB resources allocated for BT services.
Related Commands
LST CELLDLSCHALGO;
MOD CELLDLSCHALGO: LocalCellId=x, BtServiceWeight=x;
2.3.5 OtherServiceWeight (Other Service Weight)
Description
Meaning: This parameter indicates the weighting factor for non-BT services when
DlschStrategy is set to DLSCH_PRI_TYPE_EPF.
Value type: interval
Value range: 0 to 100
Unit: 0.01
Default value: 10
Parameter relationship: The value of this parameter must not be smaller than the value of
BtServiceWeight.
Impact scope: cell
Setting
The value of this parameter is an important factor in determining the scheduling priority of a
UE and the amount of physical resources that the eNodeB allocates to a UE. Increasing the
value of this parameter enhances the scheduling priority of and increases the amount of RB
resources allocated to non-BT services. Decreasing the value of this parameter lowers the
scheduling priority of and reduces the amount of RB resources allocated for non-BT services.
This parameter is valid only when ServiceDiffSwitch is set to ON.
Related Commands
LST CELLDLSCHALGO;
MOD CELLDLSCHALGO: LocalCellId=x, OtherServiceWeight=x;
[键入文字]
2.4 PDCCH Resource Allocation
2.4.1 CCEUseRatio (CCE use ratio)
Description
Meaning: This parameter indicates the upper threshold for the CCE utilization rate at each
TTI.
Value type: integer
Value range: 0 to 100
Adjustment step: 1
Unit: none
Default value: 100
Parameter relationship: none
Impact scope: eNodeB
Setting
This parameter is used to control the CCE utilization rate at each TTI. This parameter is
invalid when PDCCHSymbolNumberSwitch is set to ON.
If the parameter is set too small, the number of available CCE is small. In this case, success
rates of network access and CCE allocation decrease, especially for uplink scheduling. You
are advised to set this parameter to a value greater than 23. The following table lists the
minimum values recommended for various bandwidths.
Minimum CCE Usage Ratio
10 MHz
15 MHz
20 MHz
CFI=1, Port4
100
100
100
CFI=2, Port4
100
80
60
CFI=3, Port4
65
44
32
CFI=1, Port2
100
100
100
CFI=2, Port2
100
63
50
CFI=3, Port4
58
38
28
If V MIMO and MU BF are enabled, you are advised to set this parameter to 100. Otherwise,
CCE allocation for paring UEs may fail and the performance of Virtual MIMO and MU BF
may be compromised.
Impact of parameter setting on network performance: Decreasing the value of this parameter
may reduce the number of UEs scheduled in a TTI, reduce the uplink and downlink
throughout, and negatively affect the QoS of a service and cell capacity.
[键入文字]
Related Commands
LST CELLPDCCHALGO;
MOD CELLPDCCHALGO: LocalCellId=x, CceUseRatio=x;
[键入文字]
3
Downlink ICIC
3.1 DlIcicSwitch (DlIcic algorithm switch)
Description
Meaning: This parameter indicates whether downlink ICIC is enabled or which type of
downlink ICIC algorithm is used.
Value type: enumeration
Value range: DlIcicSwitch_OFF_ENUM, DlIcicDynamicSwitch_ON_ENUM,
DlIcicStaticSwitch_ON_ENUM, DlIcicReuse3Switch_ON_ENUM
Unit: none
Default value: DlIcicSwitch_OFF_ENUM
Parameter relationship: Cells configured with punctured RBs and non-standard bandwidths
support only static ICIC. If adaptive DL ICIC is enabled, static and dynamic DL ICIC do not
take effect.
Impact scope: eNodeB
Setting
If this parameter is set to a value other than DlIcicSwitch_OFF_ENUM, the system capacity
decreases, but eNodeB coverage improves.
Related Commands
LST ENODEBALGOSWITCH:;
MOD ENODEBALGOSWITCH: DlIcicSwitch=DlIcicSwitch_OFF_ENUM;
3.2 BandMode (Downlink band division scheme)
Description
Meaning: This parameter indicates the range of the edge band in a cell.
[键入文字]
Value type: enumeration
Value range: Mode1, Mode2, Mode3, Invalid
Unit: none
Default value: Invalid
Parameter relationship: none
Impact scope: cell
Setting
This parameter is valid only when downlink ICIC is enabled.
Related Commands
LST CELLDLICIC: LocalCellId=0;
MOD CELLDLICIC: LocalCellId=0, BandMode=MODE1;
3.3 A3Offset (Downlink ICIC A3 offset)
Description
Meaning: This parameter indicates the offset for the event A3 trigger condition when
downlink ICIC is enabled. If the RSRP difference between a neighboring cell and the serving
cell is greater than the value of this parameter, the UE is recognized as a CEU in the serving
cell.
Value type: integer
Value range: -30 to 30
Unit: 0.5 dB
Default value: -10
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set too large, the event A3 trigger condition is hard to be met and fewer
UEs report event A3 to the eNodeB. In this case, CEU performance is not guaranteed and cell
capacities decrease.
If this parameter is set too small, the event A3 trigger condition is easy to be met and more
UEs report event A3 to the eNodeB. As a result, a CEU cannot be located accurately based on
event A3 measurement reports. In addition, more UEs are scheduled in edge bands and the
average throughput of edge UEs decrease.
[键入文字]
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: A3Offset=-10;
3.4 Hysteresis (DownLink ICIC measurement hysteresis)
Description
Meaning: This parameter indicates the hysteresis for event A3 when downlink ICIC is
enabled.
Value type: integer
Value range: 0 to 30
Unit: 0.5 dB
Default value: 4
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set too large, the event A3 trigger condition is hard to be met. If this
parameter is set too small, the event A3 trigger condition is easy to be met and more UEs may
report event A3 to the eNodeB, reducing the throughput of CEUs and the cell.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: LocalCellId=0, Hysteresis=4;
3.5 TimeToTrigger (DownLink ICIC measurement time to
trigger)
Description
Meaning: This parameter indicates the length of time that a UE waits to report event A3 to the
eNodeB after detecting event A3 and, during the period, the formula of event A3 stays true. A
UE detects event A3 when the measurement result indicates that the entering condition or
leaving condition for event A3 is met.
Value type: enumeration
Value range: 0, 40, 64, 80, 100, 128, 160, 256, 320, 480, 512, 640, 1024, 1280, 2560, 5120
Unit: ms
[键入文字]
Default value: 640
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set too large, the UE must wait a long period of time to report event A3 to
the eNodeB after detecting event A3. If this parameter is set too small, the UE may report
event A3 immediately after detecting event A3. In this case, the UE location in a cell cannot
be updated in a timely manner, the ICIC effect is compromised, and the cell capacity and
CEU throughout decrease.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: TimeToTrigger=640ms;
3.6 MaxReportCellNum (Downlink ICIC measurement
max report cell number)
Description
Meaning: This parameter indicates the maximum number of neighboring cells to be included
in event A3 measurement report.
Value type: integer
Value range: 1 to 8
Unit: none
Default value: 8
Parameter relationship: none
Impact scope: cell
Setting
Increasing the value of this parameter enhances the evaluation accuracy of interference on
neighboring cells, improves CEU performance, and increases the average CEU throughput.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: MaxReportCellNum=8;
[键入文字]
3.7 ReportInterval (Downlink ICIC measurement report
interval)
Description
Meaning: This parameter indicates the interval between event A3 measurement reports that a
UE sends to the eNodeB after event A3 is detected. For details, see 3GPP TS 36.331.
Value type: enumeration
Value range: 120ms, 240ms, 480ms, 640ms, 1024ms, 2048ms, 5120ms, 10240ms, 1min, 6min,
12min, 30min, 60min
Unit: ms
Default value: 5120
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set to a large value, the CEU reports event A3 to the eNodeB in a less
frequent manner and the UE location is not updated efficiently. As a result, the average CEU
throughput decreases. If this parameter is set to a small value, the CEU may frequently report
event A3 to the eNodeB, using more band resources.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: ReportInterval=5120ms;
3.8 ReportAmount (Downlink ICIC measurement report
amount)
Description
Meaning: This parameter indicates the number of times a CEU reports event A3 to the
eNodeB. A CEU stops reporting event A3 when the number of times it has reported event A3
reaches the value of this parameter.
Value type: enumeration
Value range: 1, 2, 4, 8, 16, 32, 64, infinity
Unit: none
Default value: infinity
Parameter relationship: none
Impact scope: eNodeB
[键入文字]
Setting
If this parameter is not set to infinity, a CEU may be recognized as a CCU.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: ReportAmount=Infinity;
3.9 TriggerQuantity (DownLink ICIC measurement
trigger quantity)
Description
Meaning: This parameter indicates the source from which the UE obtains the signal received
power of a neighboring cell and the serving cell. Then, the UE applies these two values in the
event A3 formula to determine whether the event A3 trigger condition is met.
Value type: enumeration
Value range: RSRP, RSRQ
Unit: none
Default value: RSRP
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set to RSRP, the obtained signal received power does not dramatically
fluctuate with the cell load. If this parameter is set to RSRQ, the obtained signal received
power dramatically fluctuates with the cell load but the signal quality can be reflected in real
time.
Changing the value of this parameter changes the event A3 trigger condition.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: LocalCellId=0, TriggerQuantity=RSRP;
[键入文字]
3.10 ReportQuantity (DownLink ICIC measurement report
quantity)
Description
Meaning: This parameter indicates the quantity to be included in the event A3 measurement
report when downlink ICIC is enabled. The quantity can be RSRP, RSRQ, or both.
Value type: enumeration
Value range: SAME_AS_TRIG_QUAN(The same as TriggerQuantity), BOTH(Both)
Unit: none
Default value: SAME_AS_TRIG_QUAN
Parameter relationship: none
Impact scope: eNodeB
Setting
If this parameter is set to SAME_AS_TRIG_QUAN, the report quantity included in the
event A3 measurement report is the same as that specified by TriggerQuantity. If this
parameter is set to BOTH, both the RSRP and RSRQ are included in the event A3
measurement report and TriggerQuantity is invalid. For details, see 3GPP TS 36.331.
Related Commands
LST CELLDLICICMCPARA: LocalCellId=0;
MOD CELLDLICICMCPARA: LocalCellId=0, ReportQuantity=SAME_AS_TRIG_QUAN;
[键入文字]
4
Downlink MIMO
4.1 MIMOADAPTIVESWITCH (MIMO adaptive switch)
Description
Meaning: This parameter indicates the type of adaptive MIMO for a multi-antenna eNodeB.
Value type: enumeration
Value range: NO_ADAPTIVE(NO_ADAPTIVE), OL_ADAPTIVE(OL_ADAPTIVE),
CL_ADAPTIVE(CL_ADAPTIVE), OC_ADAPTIVE(OC_ADAPTIVE)
Unit: none
Default value: OL_ADAPTIVE(OL_ADAPTIVE)
Parameter relationship: This parameter is valid only when BFALGOSWITCH is set to OFF.
Impact scope: cell
Setting
This parameter specifies the transmission modes applicable to UEs served by a multi-antenna
eNodeB in TDD mode. This parameter has an impact on cell throughput and coverage.
Related Commands
LST MIMOADAPTIVEPARACFG:;
MOD MIMOADAPTIVEPARACFG:MIMOADAPTIVESWITCH=x;
4.2 FIXEDMIMOMODE (Fixed MIMO mode)
Description
Meaning: This parameter indicates the fixed MIMO mode of a multi-antenna eNodeB in TDD
mode.
Value type: enumeration
[键入文字]
Value range: TM2(TM2), TM3(TM3), TM4(TM4), TM6(TM6)
Unit: none
Default value: TM3
Parameter relationship: This parameter is valid only when BFALGOSWITCH is set to OFF
and MIMOADAPTIVESWITCH is set to NO_ADAPTIVE.
Impact scope: cell
Setting
This parameter specifies the transmission modes applicable to UEs served by a multi-antenna
eNodeB in TDD mode. This parameter has an impact on cell throughput and coverage.
Related Commands
LST MIMOADAPTIVEPARACFG:;
MOD MIMOADAPTIVEPARACFG:FIXEDMIMOMODE=x;
4.3 MAXMIMORANKPARA (maximum number of
MIMO layers)
Description
Meaning: This parameter indicates the maximum number of layers (Rank) in MIMO
implementation during downlink scheduling.
Value type: enumeration
Value range: SW_MAX_SM_RANK_1, SW_MAX_SM_RANK_2,
SW_MAX_SM_RANK_4
Unit: none
Default value: SW_MAX_SM_RANK_1 (A license for 2 x 2 MIMO is not provided by
default.)
Parameter relationship: Setting this parameter to SW_MAX_SM_RANK_4 requires that the
eNodeB be configured with a minimum of four transmit antennas.
Impact scope: cell
Setting
This parameter has a great impact on the throughput performance of MIMO technology.
Related Commands
LST CELLDLSCHALGO:;
MOD CELLDLSCHALGO:LOCALCELLID=x,MAXMIMORANKPARA=x;
[键入文字]
5
Mobility Control
5.1 Intra-RAT Handover
5.1.1 Handover Algorithm Switch
5.1.1.1 IntraFreqCoverHoSwitch (Coverage-Based Intra-Freq HO Algo
Switch)
Description
Meaning: This parameter indicates whether the coverage-based intra-frequency handover
algorithm is enabled. This parameter is used to control seamless coverage between
intra-frequency cells.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
Setting
Recommended value: ON
If this parameter is set to ON, UEs can be handed over to an intra-frequency neighboring cell.
If this parameter is set to OFF, UEs cannot be handed over to an intra-frequency neighboring
cell.
Impact of parameter setting on network performance: If this parameter is set to ON, seamless
coverage between intra-frequency cells is guaranteed and user experience improves. If this
parameter is set to OFF, seamless coverage between intra-frequency cells cannot be
guaranteed.
[键入文字]
Related Commands
LST ENODEBALGOSWITCH
MOD ENODEBALGOSWITCH: HoAlgoSwich=IntraFreqCoverHoSwitch-1;
5.1.1.2 InterFreqCoverHoSwitch (Coverage-Based Inter-Freq HO Algo
Switch)
Description
Meaning: This parameter indicates whether the coverage-based inter-frequency handover
algorithm is enabled. This parameter is used to control seamless coverage between
inter-frequency cells.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Parameter relationship: none
Impact scope: eNodeB
Setting
Recommended value: ON
If this parameter is set to ON, UEs can be handed over to an inter-frequency neighboring cell.
If this parameter is set to OFF, UEs cannot be handed over to an inter-frequency neighboring
cell.
Impact of parameter setting on network performance: If this parameter is set to ON, seamless
coverage between inter-frequency cells is guaranteed and user experience improves. If this
parameter is set to OFF, seamless coverage between inter-frequency cells cannot be
guaranteed.
Related Commands
LST ENODEBALGOSWITCH
MOD ENODEBALGOSWITCH: HoAlgoSwich=InterFreqCoverHoSwitch-1;
5.1.1.3 BlindHoSwitch (Blind HO Switch)
Description
Meaning: This parameter indicates whether the blind handover algorithm is enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
[键入文字]
Unit: none
Default value: OFF
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
Setting
Recommended value: OFF
A blind handover is triggered when there is not enough time for GAP measurement. If this
parameter is set to ON, a UE skips GAP measurement and selects the cell with the highest
priority from the neighboring cell list. However, the handover success rate cannot be
guaranteed. If this parameter is set to OFF, a UE can be handed over only after the eNodeB
receives the measurement report from the UE and determines that the condition for a
handover is met.
Parameter adjustment scenario: Set this parameter to ON when there is not enough time for
GAP measurement and no requirement for the handover success rate.
Impact of parameter setting on network performance: If this parameter is set to ON,
handovers are performed in a timely manner, but the handover success rate may be
compromised.
Related Commands
LST ENODEBALGOSWITCH:;
MOD ENODEBALGOSWITCH: HoModeSwitch=BlindHoSwitch-1;
5.1.1.4 FreqPriorIFHOSwitch (Based on Frequency Priority HO Switch)
Description
Meaning: This parameter indicates the frequency-priority-based inter-frequency handover
switch.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: OFF
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: OFF
[键入文字]
This parameter applies only to handovers between inter-frequency co-coverage cells when
one frequency is preferred for carrying services of UEs handed over from low-priority
frequencies.
If this parameter is set to ON, an inter-frequency handover based on frequency priorities will
be triggered even when the signal quality of the serving cell is good. If this parameter is set to
OFF, inter-frequency handovers based on frequency priorities are disabled.
Impact of parameter setting on network performance: If this parameter is set to ON, a UE is
handed over to another frequency based on frequency priorities. In this case, the number of
handovers increases, but the UE data rate also increases.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: FreqPriorityHoSwitch=FreqPriorIFHOSwitch-1
5.1.1.5 FreqPriorityIFBlindHoSwitch (Frequency Priority-Based Blind HO
Switch)
Description
Meaning: This parameter indicates whether the handover based on the frequency priority is
blind.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Parameter relationship: This parameter is valid only when FreqPriorIFHOSwitch is set to
ON.
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: ON
If this parameter is set to ON, the handover based on the frequency priority is blind. If this
parameter is set to OFF, the handover based on the frequency priority requires GAP
measurement.
A blind handover is triggered when there is not enough time for GAP measurement. If this
parameter is set to ON, a UE skips GAP measurement and selects the cell with the highest
priority from the neighboring cell list. However, the handover success rate cannot be
guaranteed. If this parameter is set to OFF, a UE can be handed over only after the eNodeB
receives the measurement report from the UE and determines that the condition for a
handover is met.
[键入文字]
Set this parameter to ON if fast handover is required. In addition, set a high threshold for
event A1 to guarantee the handover success rate. This reduces the number of UEs to be
handed over to high priority cells and increases the probability for low priority cells to be
heavily loaded.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: FreqPriorityHoSwitch=FreqPriorIFBlindHOSwitch-1;
5.1.2 Intra-RAT Handover Common Parameter
5.1.2.1 IntraRATHoMaxRprtCell (Max report cell number)
Description
Meaning: This parameter indicates the maximum number of cells to be included in a handover
measurement report. For details, see 3GPP TS 36.331.
Value type: integer
Value range: 1 to 8
Adjustment step: 1
Unit: none
Default value: 4
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
Setting
Recommended value: 4
This parameter is used to limit the number of cells included in a handover measurement report
to reduce air interface overhead. Handovers can be triggered by event A1, A2, A3, and A4.
Parameter adjustment scenario: Decrease the value of this parameter if band resources are
limited and the cell is heavily loaded.
Impact of parameter setting on network performance: Decreasing the value of this parameter
reduces the number of candidate target cells, the probability of triggering handovers, and air
interface overhead. Increasing the value of this parameter increases the number of candidate
target cells and the probability of triggering handovers.
Related Commands
LST INTRARATHOCOMM:;
MOD INTRARATHOCOMM: IntraRatHoMaxRprtCell=4;
[键入文字]
5.1.2.2 IntraRATHoRprtAmount (Measurement report amount)
Description
Meaning: This parameter indicates the number of times that the UE sends the periodic
measurement report to the eNodeB after an intra-frequency or inter-frequency handover is
triggered. It is used to ensure that the eNodeB receives the measurement report and handovers
are not affected by internal processing failures. For details, see 3GPP TS 36.331.
Value type: enumeration
Value range: r1(1), r2(2), r4(4), r8(8), r16(16), r32(32), r64(64),
Adjustment step: N/A
Unit: none
Default value: infinity(infinity)
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
Setting
Recommended value: infinity(infinity)
According to the handover algorithm, if a handover is triggered by event A3 or event A4, the
eNodeB sends a handover request to the target cell to apply for resources. If the handover fails,
the UE sends another handover request to the eNodeB after the report interval of the related
event. If periodic event reporting is enabled, a UE sends another handover request after being
denied due to full load on the target cell. Increasing the value of this parameter increases the
number of times that a UE can initiate a handover and increases the probability for the UE to
be handed over to another cell. If this parameter is set to infinity, the number of times that a
UE sends the periodic measurement report to the eNodeB is unlimited.
Parameter adjustment scenario: If the quality of air interfaces is good enough, or if the UE
does not need to perform handover retries, decrease the value of this parameter.
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the handover success rate. However, if this parameter is set too large, a lot of
signaling messages are generated, wasting air interface resources. Decreasing the value of this
parameter reduces the times that a UE initiates handovers. In this case, a UE may stay at the
cell edge all the time and the QoS cannot be satisfied.
Related Commands
LST INTRARATHOCOMM:;
MOD INTRARATHOCOMM: IntraRatHoRprtAmount=Infinity;
[键入文字]
5.1.3 Intra-Frequency Handover
5.1.3.1 Intra-Frequency Handover Common Parameter
5.1.3.1.1 IntraFreqHoRprtInterval (A3 measurement report interval)
Description
Meaning: This parameter indicates the interval at which periodic measurement reports are
sent after an intra-frequency handover event is triggered. For details, see 3GPP TS 36.331.
Value type: enumeration
Value range: 120ms(120 ms), 240ms(240 ms), 480ms(480 ms), 640ms(640 ms), 1024ms(1024
ms), 2048ms(2048 ms), 5120ms(5120 ms), 10240ms(10240 ms), 1min(1 minute), 6min(6
minutes), 12min(12 minutes), 30min(30 minutes), 60min(60 minutes)
Adjustment step: N/A
Unit: ms/min
Default value: 240ms(240 ms)
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
Setting
Recommended value: 240ms(240 ms)
Delay for signaling message transmission and processing exists. Therefore, if this parameter
is set too small, the UE may not obtain the handover result before sending another periodic
measurement report and air interface overhead increases; if this parameter is set too large, the
delay for handover retry is long and the handover success rate may be compromised.
Parameter adjustment scenario: Increase the value of this parameter if a longer interval for
sending periodic measurement reports is required. Decrease the value of this parameter if a
shorter interval for sending periodic measurement reports is required.
Related Commands
LST INTRARATHOCOMM:;
MOD INTRARATHOCOMM: IntraFreqHoRprtInterval=240ms;
5.1.3.1.2 IntraFreqHoA3RprtQuan (A3 measurement report quantity)
Description
Meaning: This parameter indicates the quantity to be included in the measurement report for
an intra-frequency handover. The quantity can be RSRP, RSRQ, or both. For details, see
3GPP TS 36.331. For details, see 3GPP TS 36.331.
[键入文字]
Value type: enumeration
Value range: SAME_AS_TRIG_QUAN(The same as TriggerQuantity), BOTH(Both)
Adjustment step: N/A
Unit: none
Default value: SAME_AS_TRIG_QUAN(The same as TriggerQuantity)
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
Setting
Recommended value: SAME_AS_TRIG_QUAN(The same as TriggerQuantity)
Parameter adjustment scenario: When event A3 is triggered, the default quantity included in
the measurement report is the same as that specified by IntraFreqHoA3TrigQuan of which
the default value is RSRP. The eNodeB generates a list of target cells based on the reported
quantity. Set this parameter to BOTH if the eNodeB must make a handover decision based on
both RSRP and RSRQ.
Impact of parameter setting on network performance: The measurement result based on the
RSRP does not dramatically fluctuate with the cell load. The measurement result based on the
RSRQ dramatically fluctuates with the cell load, but reflects the real-time signal quality of the
serving cell.
Related Commands
LST INTRARATHOCOMM
MOD INTRARATHOCOMM: IntraFreqHoA3RprtQuan=SAME_AS_TRIG_QUAN;
5.1.3.1.3 IntraFreqHoA3TrigQuan (A3 measurement trigger quantity)
Description
Meaning: This parameter indicates the quantity used to evaluate the triggering condition for
an intra-frequency handover. The quantity can be RSRP or RSRQ. For details, see 3GPP TS
36.331.
Value type: enumeration
Value range: RSRP(for EUTRAN only), RSRQ(for EUTRAN only)
Adjustment step: N/A
Unit: none
Default value: RSRP(for EUTRAN only)
Parameter relationship: none
Impact scope: eNodeB
Scenario-based parameter: no
[键入文字]
Setting
Recommended value: RSRP(for EUTRAN only)
The measurement result based on the RSRP does not dramatically fluctuate with the cell load.
The measurement result based on the RSRQ dramatically fluctuates with the cell load, but
reflects the real-time signal quality of the serving cell.
If this parameter is set to RSRP, the number of unnecessary handovers triggered due to
unstable measurement results reduces.
Related Commands
LST INTRARATHOCOMM:;
MOD INTRARATHOCOMM: IntraFreqHoA3TrigQuan=RSRP;
5.1.3.1.4 QoffsetFreq (Intra frequency offset)
Description
Meaning: This parameter indicates the frequency offset of an intra-frequency neighboring
cell.
Value type: enumeration
Value range: dB-24(-24dB), dB-22(-22dB), dB-20(-20dB), dB-18(-18dB), dB-16(-16dB),
dB-14(-14dB), dB-12(-12dB), dB-10(-10dB), dB-8(-8dB), dB-6(-6dB), dB-5(-5dB),
dB-4(-4dB), dB-3(-3dB), dB-2(-2dB), dB-1(-1dB), dB0(0dB), dB1(1dB), dB2(2dB),
dB3(3dB), dB4(4dB), dB5(5dB), dB6(6dB), dB8(8dB), dB10(10dB), dB12(12dB),
dB14(14dB), dB16(16dB), dB18(18dB), dB20(20dB), dB22(22dB), dB24(24dB)
Adjustment step: N/A
Unit: dB
Default value: dB0(0dB)
Parameter relationship: none
Impact scope: cell
Setting
Recommended value: dB0(0dB)
This parameter is provided in 3GPP TS 36.331.
Event A3 trigger condition: Mn + Ofn + Ocn – Hys > Ms + Ofs + Ocs + Off
Ofs and Ofn are the offsets of serving cell and the neighboring cell, respectively. They are set
to determine the frequency to which a UE is preferentially handed over, and they are used to
evaluate the entering condition and the leaving condition of event A3. Increasing the value of
this parameter enhances the frequency priority.
In an intra-frequency handover, Ofs equals to Ofn.
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The eNodeB does not send measurement control information to a UE if the measurement
offset of an intra-frequency cell that served by another eNodeB is 0. However, the
neighboring relationship remains unchanged.
Impact of parameter setting on network performance: Increasing the value of this parameter
enhances the frequency priority. If Ofs is large, the serving cell priority is high, and the event
A3 trigger condition is hard to be met. Therefore, handovers are delayed. If Ofn is large, the
event A3 trigger condition is easy to be met. Therefore, unnecessary handovers may be
performed.
Related Commands
LST EUTRANINTERNFREQ:;
MOD EUTRANINTERNFREQ: QoffsetFreq=dB0;
5.1.3.2 IntraFreqHO Qci
5.1.3.2.1 IntraFreqHoA3Hyst (Intrafreq handover hysteresis)
Description
Meaning: This parameter indicates the hysteresis for an intra-frequency handover. This
parameter is used to reduce ping-pong handovers caused by RSRP fluctuation. For details, see
3GPP TS 36.331.
Value type: integer
Value range: 0 to 30
Adjustment step: 1
Unit: 0.5 dB
Default value: 2
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 2
Event A3 trigger condition: Mn + Ofn + Ocn – Hys > Ms + Ofs + Ocs + Off
Mn is the measurement result of the neighboring cell. Ofn is the frequency-specific offset of
the neighboring cell frequency. Ocn is the cell-specific offset of the neighboring cell. Ofs is
the frequency-specific offset of the serving cell frequency. Ocs is the cell-specific offset of the
serving cell. Off is the offset for this event. Hys is the hysteresis for this event.
Increasing the value of this parameter for a cell with a large fading variance reduces the
number of unnecessary handovers. Decreasing the value of this parameter ensures that
handovers are performed in a timely manner.
[键入文字]
Impact of parameter setting on network performance: Increasing Hys reduces the number of
times that event A3 is triggered and delays handovers. Therefore, user experience is affected.
However, reducing Hys increases the number of times that event A3 is triggered, which may
lead to unnecessary handovers and ping-pong handovers.
Related Commands
LST INTRAFREQHOGROUP:;
MOD INTRAFREQHOGROUP: LocalCellId=x, IntraFreqHoGroupId=x,
IntraFreqHoA3Hyst=2;
5.1.3.2.2 IntraFreqHoA3Offset (Intrafreq handover offset)
Description
Meaning: This parameter indicates the offset between the serving cell and the neighboring cell
in an intra-frequency handover. This parameter is used to define the event A3 trigger
condition. For details, see 3GPP TS 36.331.
Value range: -30 to 30
Adjustment step: 1
Unit: 0.5 dB
Default value: 2
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 2
Event A3 trigger condition: Mn + Ofn + Ocn – Hys > Ms + Ofs + Ocs + Off
Off equals to the value of this parameter and is used to define the event A3 trigger condition.
Impact of parameter setting on network performance: If this parameter is set to a large value,
the event A3 trigger condition is hard to be met. Therefore, handovers are delayed. If this
parameter is set to a small value, the event A3 trigger condition is easy to be met. Therefore,
unnecessary handovers may be performed.
Related Commands
LST INTRAFREQHOGROUP:;
MOD INTRAFREQHOGROUP: LocalCellId=x, QCI=x, IntraFreqHoA3Offset=2;
[键入文字]
5.1.3.2.3 IntraFreqHoA3TimeToTrig (Intrafreq handover time to trigger)
Description
Meaning: This parameter indicates the delay for intra-frequency handovers. When the event
A3 trigger condition is met, the UE waits a period of time before reporting event A3 to the
eNodeB and, during this period, the formula of event A3 stays true. In this case, both the
number of unnecessary handovers and the number of average handovers decreases.
Value type: enumeration
Value range: 0ms(0 ms), 40ms(40 ms), 64ms(64 ms), 80ms(80 ms), 100ms(100 ms),
128ms(128 ms), 160ms(160 ms), 256ms(256 ms), 320ms(320 ms), 480ms(480 ms),
512ms(512 ms), 640ms(640 ms), 1024ms(1024 ms), 1280ms(1280 ms), 2560ms(2560 ms),
5120ms(5120 ms)
Adjustment step: N/A
Unit: ms
Default value: 320ms(320 ms)
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 320ms(320 ms)
This parameter is provided in 3GPP TS 36.331.
Parameter adjustment scenario: If UEs in a cell move at a high speed, you are advised to set
this parameter to a small value, because handover delay may increase the call drop rate. If
UEs in a cell move at a low speed, you can increase the value of this parameter to prevent
ping-pong handovers and unnecessary handovers.
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the number of handovers, but may increase the call drop rate. This parameter has an
impact on the network only when its value is equal to or greater than 200 ms, because 3GPP
protocols specify that the measurement result on the physical layer is updated every 200 ms.
Related Commands
LST INTRAFREQHOGROUP:;
MOD INTRAFREQHOGROUP: IntraFreqHoA3TimeToTrig=320ms;
[键入文字]
5.1.3.3 Intra-freq HO Cell
5.1.3.3.1 CellSpecificOffset (Cell specific offset)
Description
Meaning: This parameter indicates the cell-specific offset of the serving cell. It is used to
determine the border between a neighboring cell and the serving cell.
Value type: enumeration
Value range: dB-24(-24dB), dB-22(-22dB), dB-20(-20dB), dB-18(-18dB), dB-16(-16dB),
dB-14(-14dB), dB-12(-12dB), dB-10(-10dB), dB-8(-8dB), dB-6(-6dB), dB-5(-5dB),
dB-4(-4dB), dB-3(-3dB), dB-2(-2dB), dB-1(-1dB), dB0(0dB), dB1(1dB), dB2(2dB),
dB3(3dB), dB4(4dB), dB5(5dB), dB6(6dB), dB8(8dB), dB10(10dB), dB12(12dB),
dB14(14dB), dB16(16dB), dB18(18dB), dB20(20dB), dB22(22dB), dB24(24dB)
Adjustment step: N/A
Unit: dB
Default value: dB0(0dB)
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: dB0(0dB)
This parameter is provided in 3GPP TS 36.331.
Event A3 trigger condition: Mn + Ofn + Ocn – Hys > Ms + Ofs + Ocs + Off
Ocs equals to the value of this parameter and is used to define the trigger condition of event
A3.
Impact of parameter setting on network performance: If this parameter is set to a large value,
the event A3 trigger condition is hard to be met. Therefore, handovers are delayed. If this
parameter is set to a small value, the event A3 trigger condition is easy to be met. Therefore,
unnecessary handovers may be performed.
Related Commands
LST CELL
MOD CELL: LocalCellId=x, CellSpecificOffset=dB0;
5.1.3.3.2 CellIndividualOffset (Cell individual offset)
Description
Meaning: This parameter indicates the cell-specific offset of the neighboring cell. It is used to
define the trigger condition of event A3.
[键入文字]
Value type: enumeration
Value range: dB-24(-24dB), dB-22(-22dB), dB-20(-20dB), dB-18(-18dB), dB-16(-16dB),
dB-14(-14dB), dB-12(-12dB), dB-10(-10dB), dB-8(-8dB), dB-6(-6dB), dB-5(-5dB),
dB-4(-4dB), dB-3(-3dB), dB-2(-2dB), dB-1(-1dB), dB0(0dB), dB1(1dB), dB2(2dB),
dB3(3dB), dB4(4dB), dB5(5dB), dB6(6dB), dB8(8dB), dB10(10dB), dB12(12dB),
dB14(14dB), dB16(16dB), dB18(18dB), dB20(20dB), dB22(22dB), dB24(24dB)
Adjustment step: N/A
Unit: dB
Default value: dB0(0dB)
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: dB0(0dB)
This parameter is provided in 3GPP TS 36.331.
Event A3 trigger condition: Mn + Ofn + Ocn – Hys > Ms + Ofs + Ocs + Off
Ocn equals to the value of this parameter and is used to define the event A3 trigger condition.
Impact of parameter setting on network performance: If this parameter is set to a large value,
the event A3 trigger condition is easy to be met. Therefore, unnecessary handovers may be
performed. If this parameter is set to a small value, the event A3 trigger condition is hard to be
met. Therefore, handovers are delayed.
Related Commands
LST EUTRANINTRAFREQNCELL:;
MOD EUTRANINTRAFREQNCELL: LocalCellId=x, Mcc=x, Mnc=x, eNodeBId=x,
CellId=x, CellIndividualOffset=dB0;
5.1.4 Measurement-Related Parameters
5.1.4.1 GapPatternType (GAP measurement pattern)
Description
Meaning: This parameter indicates the GAP measurement pattern that the eNodeB specifies
based on the GAP pattern ID. For details, see 3GPP TS 36.331.
Value type: enumeration
Value range: GAP_PATTERN_TYPE_1(GAP type 1),
GAP_PATTERN_TYPE_2(GAP type 2)
Adjustment step: N/A
Unit: none
[键入文字]
Default value: GAP_PATTERN_TYPE_1(GAP type 1)
Parameter relationship: none
Impact scope: cell
Setting
Recommended value: GAP_PATTERN_TYPE_1(GAP type 1)
If this parameter is set to GAP_PATTERN_TYPE_1, the measurement takes 6 ms and is
performed every 40 ms. If this parameter is set to GAP_PATTERN_TYPE_2, the
measurement takes 6 ms and is performed every 80 ms.
Impact of parameter setting on network performance: This parameter has an impact on the
GAP measurement speed.
Related Commands
LST HOMEASCOMM:;
MOD HOMEASCOMM: GapPatternType=GAP_PATTERN_TYPE_1;
5.1.4.2 EutranFilterCoeffRSRP (EUTRAN RSRP filter coefficient)
Description
Meaning: This parameter indicates the layer3 filtering coefficient for RSRP measurement on
EUTRAN.
Value type: enumeration
Value range: FC0(FC0), FC1(FC1), FC2(FC2), FC3(FC3), FC4(FC4), FC5(FC5), FC6(FC6),
FC7(FC7), FC8(FC8), FC9(FC9), FC11(FC11), FC13(FC13), FC15(FC15), FC17(FC17),
FC19(FC19)
Adjustment step: N/A
Unit: none
Default value: FC6(FC6)
Parameter relationship: none
Impact scope: cell
Setting
This parameter is provided in 3GPP TS 36.331.
If this parameter is set to a large value, the RSRP measurement result at the physical layer has
a small impact on the measurement value after signal filtering. Therefore, the measurement
value after signal filtering does not dramatically fluctuate with the radio channel condition
changes, and the number of event measurement reports decreases.
Related Commands
LST HOMEASCOMM:;
[键入文字]
MOD HOMEASCOMM: EutranFilterCoeffRSRP = FC6;
5.2 Cell Reselection Parameters
5.2.1 QRxLevMin (Minimum required RX level)
Description
Meaning: This parameter indicates the required minimum receive level used in criteria S. It
affects the possibility for selecting an E-UTRAN cell. The value of this parameter is delivered
in SIB1. The actual value is equal to the IE value in SIB1 multiplied by 2. For details, see
3GPP TS 36.331.
Value type: integer
Value range: -70 to -22
Adjustment step: 1
Unit: 2 dBm
Default value: -64
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: -64
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell reduces the possibility for selecting the cell. This parameter must be properly set to
ensure that the signal quality of the cell meets service requirements.
Related Commands
MOD CELLSEL:;
MOD CELLSEL: LocalCellId=x, QRxLevMin=-64;
5.2.2 QRxLevMinOffset (Minimum required RX level offset)
Description
Meaning: This parameter indicates the offset of the minimum receive level for a UE served by
a visited public land mobile network (VPLMN) to attempt to select a higher-priority PLMN
cell. The value of this parameter is delivered in SIB1. The actual value is equal to the IE value
in SIB1 multiplied by 2. For details, see 3GPP TS 36.331.
Value type: integer
Value range: 0 to 8
[键入文字]
Adjustment step: 1
Unit: 2 dB
Default value: 0
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 0
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell increases the possibility for selecting the cell. If SIB1 does not contain the value of
this parameter, the default value 0 is used.
Related Commands
MOD CELLSEL:;
MOD CELLSEL: LocalCellId=5, QRxLevMinOffset=0;
5.2.3 QQualMin (Minimum required RX quality level)
Description
Meaning: This parameter indicates the required minimum receive level used in criteria S. It
affects the possibility for selecting an E-UTRAN cell. The value of this parameter is delivered
in SIB1. The actual value is equal to the IE value in SIB1 multiplied by 2. For details, see
3GPP TS 36.331.
Value type: integer
Value range: -34 to -3
Adjustment step: 1
Unit: dB
Default value: -18
Parameter relationship: If SIB3 contains ThrshServLowQ, this parameter must be delivered
in SIB1.
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: -18
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell reduces the possibility for selecting the cell. This parameter must be properly set to
[键入文字]
ensure that the signal quality of the cell meets service requirements. If SIB1 does not contain
the value of this parameter, the value -∞ is used.
Related Commands
LST CELLSEL;
MOD CELLSEL: LocalCellId=x, QQualMin=x;
5.2.4 QQualMinOffset (Minimum required RX quality level
offset)
Description
Meaning: This parameter indicates the offset of the minimum receive signal quality for a UE
served by a VPLMN to attempt to select a higher-priority PLMN cell. The value of this
parameter is delivered in SIB1. The actual value is equal to the IE value in SIB1. For details,
see 3GPP TS 36.331.
Value type: integer
Value range: 1 to 8
Adjustment step: 1
Unit: dB
Default value: 1
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 1
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell increases the possibility for selecting the cell. If SIB1 does not contain the value of
this parameter, the default value 0 is used.
Related Commands
LST CELLSEL;
MOD CELLSEL: QQualMinOffsetCfgInd= CFG, QQualMinOffset=x;
5.2.5 SIntraSearch (Threshold for intra frequency measurements)
Description
Meaning: This parameter indicates the threshold for triggering measurement of
intra-frequency cells. The value of this parameter is delivered in SIB3. The actual value is
equal to the IE value in SIB3 multiplied by 2. For details, see 3GPP TS 36.331.
[键入文字]
Value type: integer
Value range: 0 to 31
Adjustment step: 1
Unit: 2 dB
Default value: 29
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 29
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the possibility for triggering measurement of intra-frequency cells. If SIB3 does not
contain the value of this parameter, the value ∞ is used and measurement of intra-frequency
cells is performed.
Related Commands
LST CELLRESEL:;
MOD CELLRESEL: LocalCellId=x, SIntraSearchCfgInd=CFG, SIntraSearch=29;
5.2.6 ThrshServLow (Serving frequency lower priority threshold)
Description
Meaning: This parameter indicates the threshold for triggering cell reselection to a
lower-priority inter-frequency or inter-RAT cell. The value of this parameter is delivered in
SIB3. The actual value is equal to the IE value in SIB3 multiplied by 2. For details, see 3GPP
TS 36.331.
Value type: integer
Value range: 0 to 31
Adjustment step: 1
Unit: 2 dB
Default value: 0
Parameter relationship: none
Impact scope: cell
Setting
Recommended value: 0
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell increases the possibility for reselecting the cell.
[键入文字]
Related Commands
MOD CELLRESEL:;
MOD CELLRESEL: LocalCellId=x, ThrshServLow=0;
5.2.7 SNonIntraSearch (Threshold for EUTRAN inter-frequency
and inter-RAT measurements)
Description
Meaning: This parameter indicates the threshold for triggering measurement of
inter-frequency or inter-RAT cells. The value of this parameter is delivered in SIB3. The
actual value is equal to the IE value in SIB3 multiplied by 2. For details, see 3GPP TS 36.331.
Value type: integer
Value range: 0 to 31
Adjustment step: 1
Unit: 2 dB
Default value: 5
Parameter relationship: This parameter is optional, depending on the setting of the
SNonIntraSearchCfgInd parameter:


When SNonIntraSearchCfgInd is set to CFG, SNonIntraSearch must be set.
When SNonIntraSearchCfgInd is set to NOT_CFG, SNonIntraSearch does not need
to be set.
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 5
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the possibility for triggering measurement of same-priority inter-frequency cells or
lower-priority inter-frequency or inter-RAT cells. If SIB3 does not contain the value of this
parameter, the value ∞ is used and t\measurement of same-priority inter-frequency cells or
lower-priority inter-frequency or inter-RAT cells is performed.
Related Commands
MOD CELLRESEL:;
MOD CELLRESEL: LocalCellId=x, SNonIntraSearchCfgInd=CFG, SNonIntraSearch=5;
[键入文字]
5.2.8 SIntraSearchQ (RSRQ Threshold for intra frequency
measurements)
Description
Meaning: This parameter indicates the RSRQ threshold for starting measurement of
intra-frequency cells. The value of this parameter is delivered in SIB3. The actual value is
equal to the IE value in SIB3. For details, see 3GPP TS 36.331.
Value type: integer
Value range: 0 to 31
Adjustment step: 1
Unit: dB
Default value: 5
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 5
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the possibility for triggering measurement of intra-frequency cells.
Related Commands
LST CELLRESEL;
MOD CELLRESEL: SIntraSearchQ=x;
5.2.9 CellReselPriority (Cell reselection priority)
Description
Meaning: This parameter indicates the priority of the frequency being used by the UE. It
affects the frequency usage. The value of this parameter is delivered in SIB3. For details, see
3GPP TS 36.331.
Value type: integer
Value range: 0 to 7
Adjustment step: 1
Unit: none
Default value: 7
Parameter relationship: none
[键入文字]
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 7
Impact of parameter setting on network performance: Cells in different RATs must have
different priorities. Increasing the value of this parameter reduces the possibility for
reselecting an inter-frequency cell.
Related Commands
LST CELLRESEL:;
MOD CELLRESEL: LocalCellId=x, CellReselPriority=0;
5.2.10 QRxLevMin (Minimum required RX level)
Description
Meaning: This parameter indicates the minimum receive level required for reselecting an
intra-frequency E-UTRAN cell. It affects the possibility for reselecting an E-UTRAN cell.
The value of this parameter is delivered in SIB3. For details, see 3GPP TS 36.331.
Value type: integer
Value range: -70 to -22
Adjustment step: 1
Unit: 2 dBm
Default value: -64
Parameter relationship: none
Impact scope: cell
Setting
Recommended value: -64
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell reduces the possibility for selecting the cell. This parameter must be properly set to
ensure that the signal quality of the cell meets service requirements.
Related Commands
LST CELLRESEL:
MOD CELLRESEL: LocalCellId=x, QRxLevMin=-64;
[键入文字]
5.2.11 QqualMin (Minimum RX signal quality)
Description
Meaning: This parameter indicates the minimum receive signal quality required for
reselecting an intra-frequency E-UTRAN cell. It affects the possibility for reselecting an
intra-frequency E-UTRAN cell. The value of this parameter is delivered in SIB3. For details,
see 3GPP TS 36.331.
Value type: integer
Value range: -34 to -3
Adjustment step: 1
Unit: dB
Default value: -18
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: -18
Impact of parameter setting on network performance: Increasing the value of this parameter
for a cell reduces the possibility for selecting the cell. This parameter must be properly set to
ensure that the signal quality of the cell meets service requirements.
Related Commands
LST CELLRESEL;
MOD CELLRESEL: LocalCellId=x,QqualMinCfgInd= CFG, QqualMin=x;
5.2.12 MeasBandWidth (Measurement bandwidth)
Description
Meaning: This parameter indicates the measurement bandwidth on the serving frequency on
which the UE camps. It is used in intra-frequency measurements for cell reselection and those
by UEs in RRC_CONNECTED mode. This parameter is optional; if it is not set, the downlink
bandwidth of the serving cell is used by default.
Value type: enumeration
Value range: MBW6(1.4M), MBW15(3M), MBW25(5M), MBW50(10M), MBW75(15M),
MBW100(20M)
Adjustment step: N/A
Unit: MHz
Default value: MBW6(1.4M)
[键入文字]
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: downlink bandwidth of the serving cell
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the measurement deviation but increases the amount of resources consumed.
Related Commands
LST CELLRESEL:;
MOD CELLRESEL: LocalCellId=x, SIntraSearchCfgInd=CFG,
MeasBandWidthCfgInd=CFG, MeasBandWidth= MBW6;
5.2.13 CellQoffset (Cell offset)
Description
Meaning: This parameter indicates the offset between the serving cell and an intra-frequency
neighboring cell. It affects the possibility for reselecting an intra-frequency cell. The value of
this parameter is delivered in SIB4. For details, see 3GPP TS 36.331.
Value type: enumeration
Value range: dB-24(-24dB), dB-22(-22dB), dB-20(-20dB), dB-18(-18dB), dB-16(-16dB),
dB-14(-14dB), dB-12(-12dB), dB-10(-10dB), dB-8(-8dB), dB-6(-6dB), dB-5(-5dB),
dB-4(-4dB), dB-3(-3dB), dB-2(-2dB), dB-1(-1dB), dB0(0dB), dB1(1dB), dB2(2dB),
dB3(3dB), dB4(4dB), dB5(5dB), dB6(6dB), dB8(8dB), dB10(10dB), dB12(12dB),
dB14(14dB), dB16(16dB), dB18(18dB), dB20(20dB), dB22(22dB), dB24(24dB)
Adjustment step: N/A
Unit: dB
Default value: dB0(0dB)
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: dB0(0dB)
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the possibility that the UE resides in the neighboring cell during cell reselection.
Related Commands
LST EUTRANINTRAFREQNCELL:;
[键入文字]
MOD EUTRANINTRAFREQNCELL: LocalCellId=x, Mcc=x, Mnc=x, eNodeBId=x,
CellId=x, CellQoffset=0;
5.2.14 QoffsetFreq (Frequency offset)
Description
Meaning: This parameter indicates the frequency offset of an inter-frequency E-UTRAN cell.
It affects the possibility for reselecting an inter-frequency E-UTRAN cell. The value of this
parameter is delivered in SIB5. For details, see 3GPP TS 36.331.
Value type: enumeration
Value range: dB-24(-24dB), dB-22(-22dB), dB-20(-20dB), dB-18(-18dB), dB-16(-16dB),
dB-14(-14dB), dB-12(-12dB), dB-10(-10dB), dB-8(-8dB), dB-6(-6dB), dB-5(-5dB),
dB-4(-4dB), dB-3(-3dB), dB-2(-2dB), dB-1(-1dB), dB0(0dB), dB1(1dB), dB2(2dB),
dB3(3dB), dB4(4dB), dB5(5dB), dB6(6dB), dB8(8dB), dB10(10dB), dB12(12dB),
dB14(14dB), dB16(16dB), dB18(18dB), dB20(20dB), dB22(22dB), dB24(24dB)
Adjustment step: N/A
Unit: dB
Default value: dB0(0dB)
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: dB0(0dB)
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the possibility for selecting other frequency-specific cells. This parameter must be
properly set to prevent the event that the UE fails to enter the target cell in time after exiting
the original residence cell.
Related Commands
LST EUTRANINTERNFREQ:;
MOD EUTRANINTERNFREQ: LocalCellId=x, DlEarfcn=x, QoffsetFreq=0;
5.2.15 Qhyst (Hysteresis value for ranking criteria)
Description
Meaning: This parameter indicates the hysteresis for reselecting an intra-frequency cell or a
cell with the same priority. It affects the possibility for reselecting an intra-frequency cell or a
cell with the same priority to reduce ping-pong handovers. The value of this parameter is
delivered in SIB3. For details, see 3GPP TS 36.331.
Value type: integer
[键入文字]
Value range: DB0_Q_HYST(0dB), DB1_Q_HYST(1dB), DB2_Q_HYST(2dB),
DB3_Q_HYST(3dB), DB4_Q_HYST(4dB), DB5_Q_HYST(5dB),
DB6_Q_HYST(6dB), DB8_Q_HYST(8dB), DB10_Q_HYST(10dB),
DB12_Q_HYST(12dB), DB14_Q_HYST(14dB), DB16_Q_HYST(16dB),
DB18_Q_HYST(18dB), DB20_Q_HYST(20dB), DB22_Q_HYST(22dB),
DB24_Q_HYST(24dB)
Adjustment step: N/A
Unit: dB
Default value: DB4_Q_HYST(4dB)
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: DB4_Q_HYST(4dB)
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the possibility for reselecting an intra-frequency cell or a cell with the same priority.
Related Commands
LST CELLRESEL;
MOD CELLRESEL: LocalCellId=0, Qhyst=DB4_Q_HYST;
5.2.16 TReselEutran (Cell reselection timer value for EUTRAN)
Description
Meaning: This parameter indicates the time for reselecting an E-UTRAN cell. It controls the
triggering of cell reselection to an intra-frequency cell or a cell with the same priority. If the
conditions of a cell are better than those of the serving cell within the time specified by this
parameter and the UE resides in the serving cell for more than 1 second, the UE will reselect
the cell with better conditions. The value of this parameter is delivered in SIB3. For details,
see 3GPP TS 36.331.
Value type: integer
Value range: 0 to 7
Adjustment step: 1
Unit: s
Default value: 1
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
[键入文字]
Setting
Recommended value: 1
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the possibility for reselecting an intra-frequency cell or a cell with the same priority.
Related Commands
LST CELLRESEL;
MOD CELLRESEL: LocalCellId=0x PMaxCfgInd=NOT_CFG, TReselEutran=1;
5.2.17 PMax (Max transmit power allowed) in CellResel
Description
Meaning: This parameter indicates the maximum transmit power of the UE during
intra-frequency E-UTRAN cell reselection. It controls the uplink coverage radius. The value
of this parameter is delivered in SIB3. For details, see 3GPP TS 36.331.
Value type: integer
Value range: -30 to 33
Adjustment step: 1
Unit: dBm
Default value: 23
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 23
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the possibility for reselecting an inter-frequency cell. The value of this parameter is
the same as the maximum power of the random access channel (RACH) and is set based on
the actual coverage.
Related Commands
LST CELLRESEL:;
MOD CELLRESEL: LocalCellId=x, PMaxCfgInd=CFG, PMax=23;
[键入文字]
5.2.18 TreselectionHrpd (Cell reselection timer for HRPD)
Description
Meaning: This parameter indicates the evaluation time for cell reselection when the UE
resides in a CDMA2000 HRPD cell. It determines the triggering of CDMA2000 HRPD cell
reselection. The value of this parameter is delivered in SIB8. For details, see 3GPP TS 36.331.
Value type: integer
Value range: 0 to 7
Adjustment step: 1
Unit: s
Default value: 1
Parameter relationship: none
Impact scope: cell
Scenario-based parameter: no
Setting
Recommended value: 1
Impact of parameter setting on network performance: Increasing the value of this parameter
reduces the possibility for reselecting the serving cell.
Related Commands
LST CELLRESELCDMA2000:;
MOD CELLRESELCDMA2000: LocalCellId=x, HrpdParamCfgInd=CFG,
HrpdCellReselectParamCfgInd=CFG, TreselectionHrpd=1;
[键入文字]
6
Load Control
6.1 Load Control Algorithm
6.1.1 UlLdcSwitch (Switch for the Uplink Load Control
Algorithm)
Description
Meaning: This parameter indicates whether the uplink load control function is enabled.
Value type: enumeration
Value range: On, Off
Adjustment step: N/A
Unit: none
Default value: Off
Parameter relationship: none
Impact scope: cell
Setting
If this parameter is set to Off, the uplink load is not controlled and no measure is taken to
balance the uplink load when the load in the uplink is heavy. Consequently, the call drop rate
increases and user experience is affected.
If this parameter is set to On, the uplink overload can be detected and measures can be taken
to actively release some resources to balance the uplink load. As a result, the call drop rate
increases due to active resource release.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: LocalCellId=x, RacAlgoSwitch=UlLdcSwitch-x;
[键入文字]
6.1.2 DlLdcSwitch (Switch for the Downlink Load Control
Algorithm)
Description
Meaning: This parameter indicates whether the downlink load control function is enabled.
Value type: enumeration
Value range: On, Off
Adjustment step: N/A
Unit: none
Default value: Off
Parameter relationship: none
Impact scope: cell
Setting
If this parameter is set to Off, the downlink load is not controlled and no measure is taken to
balance the downlink load when the load in the downlink is heavy. Consequently, the call
drop rate increases and user experience is affected.
If this parameter is set to On, the downlink overload can be detected and measures can be
taken to actively release some resources to balance the downlink load. As a result, the call
drop rate increases due to active resource release.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: LocalCellId=x, RacAlgoSwitch=DlLdcSwitch-x;
6.2 Admission Control
6.2.1 GbrUsageSwitch (Switch for Detecting the Number of PRBs
Occupied by GBR Services)
Description
Meaning: This parameter indicates whether the number of physical resource blocks (PRBs)
occupied by GBR services is under control.
Value type: enumeration
Value range: On, Off
Unit: none
Default value: Off
[键入文字]
Impact scope: cell
Setting
If this parameter is set to Off, GBR services may occupy excessive PRB resources because
the scheduling algorithm preferentially guarantees GBR services except for IP Multimedia
Subsystem (IMS) signaling. As a result, the admission rate is low. If this parameter is set to
On, the proportion of PRBs occupied by GBR services is limited. This improves the
admission rate and handover success rate, but uses more resources.
Related Commands
LST CELLALGOSWITCH:;
MOD CELLALGOSWITCH: LOCALCELLID=0,
RACALGOSWITCH=GbrUsageSwitch-0;
6.2.2 GbrRbUsedHighThd (GBR used resource high proportion
threshold)
Description
Meaning: This parameter indicates the upper threshold of the proportion of PRBs occupied by
GBR services.
This parameter applies to both the uplink and the downlink. If the proportion of PRBs
occupied by GBR services is greater than the value of this parameter and GbrUsageSwitch
under the RacAlgoSwitch parameter is set to On, the system rejects new GBR service access
requests.
Value type: integer
Value range: 0 to 100
Unit: %
Default value: 95
Impact scope: cell
Setting
Decreasing the value of this parameter reduces the proportion of PRBs occupied by GBR
services and the admission success rate of GBR services. As a result, PRBs cannot be fully
used. Increasing the value of this parameter increases the offline rate of non-GBR services
and the call drop rate.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, GBRRBUSEDHIGHTHD=0;
[键入文字]
6.2.3 GbrRbUsedLowThd (GBR used resource low proportion
threshold)
Description
Meaning: This parameter indicates the lower threshold of the proportion of PRBs occupied by
GBR services. If the PRB usage of GBR services falls below the threshold, the usage is
considered to be low.
Value type: integer
Value range: 0 to 100
Unit: %
Default value: 90
Impact scope: cell
Setting
Decreasing the value of this parameter reduces the possibility for reporting the message
indicating a low PRB usage and increases the number of GBR service admission failures.
Increasing the value of this parameter increases the possibility for frequent switching between
the high PRB usage indication and the low PRB usage indication.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, GBRRBUSEDLOWTHD=0;
6.2.4 DlRbLowThd (Downlink RB used ratio low threshold)
Description
Meaning: This parameter indicates the lower threshold of the proportion of downlink RBs
occupied. It is used to determine whether a service admission request is accepted in the
downlink. If the downlink RB usage reported by the MAC layer is less than the value of this
parameter, the downlink RB usage is low.
Value type: integer
Value range: 10 to 100
Unit: %
Default value: 90
Impact scope: cell
Setting
Increasing the value of this parameter increases the possibility for generating the low RB
usage indication in the downlink, which may cause excessive admission, but the protection
[键入文字]
for resource allocation is performed after the admission decision. Therefore, this parameter
has no obvious impact on the overall QoS satisfaction rate.
Decreasing the value of this parameter reduces the possibility for generating the low RB
usage indication in the downlink and the admission success rate, but the protection for
resource allocation is performed after the admission decision. Therefore, this parameter has
no obvious impact on admission. In addition, when the value of the parameter is small, the
load control algorithm may mistakenly trigger the service release, which will increase the call
drop rate.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, DLRBLOWTHD=10;
6.2.5 DlRbHighThd (Downlink RB used ratio high threshold)
Description
Meaning: This parameter indicates the upper threshold of the proportion of downlink RBs
occupied. It is used to determine whether a service admission request is accepted in the
downlink. If the downlink RB usage reported by the MAC layer is greater than the value of
this parameter, the downlink RB usage is high.
Value type: integer
Value range: 10 to 100
Unit: %
Default value: 95
Impact scope: cell
Setting
Increasing the value of this parameter reduces the possibility for generating the high RB usage
indication in the downlink, which may cause excessive admission, but the protection for
resource allocation is performed after the admission decision. In addition, when the value of
the parameter is too large, load control actions are taken more slowly.
Decreasing the value of this parameter increases the possibility for generating the high RB
usage indication in the downlink, but the satisfaction rates are compared further for admission
decision. Therefore, this parameter has no obvious impact on admission. In addition, when the
value of the parameter is too small, excessive load control actions may be taken.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, DLRBHIGHTHD=10;
[键入文字]
6.2.6 UlRbLowThd (Uplink RB used ratio low threshold)
Description
Meaning: This parameter indicates the lower threshold of the proportion of uplink RBs
occupied. It is used to determine whether a service admission request is accepted in the uplink.
If the uplink RB usage reported by the MAC layer is less than the value of this parameter, the
uplink RB usage is low.
Value type: integer
Value range: 10 to 100
Unit: %
Default value: 90
Impact scope: cell
Setting
Increasing the value of this parameter increases the possibility for generating the low RB
usage indication in the uplink, which may cause excessive admission, but the protection for
resource allocation is performed after the admission decision. Therefore, this parameter has
no obvious impact on the overall QoS satisfaction rate.
Decreasing the value of this parameter reduces the possibility for generating the low RB
usage indication in the uplink and the admission success rate, but the protection for resource
allocation is performed after the admission decision. Therefore, this parameter has no obvious
impact on admission. In addition, when the value of the parameter is small, the load control
algorithm may mistakenly trigger the service release, which will increase the call drop rate.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, ULRBLOWTHD=10;
6.2.7 UlRbHighThd (Uplink RB used ratio high threshold)
Description
Meaning: This parameter indicates the upper threshold of the proportion of uplink RBs
occupied. It is used to determine whether a service admission request is accepted in the uplink.
If the uplink RB usage reported by the MAC layer is greater than the value of this parameter,
the uplink RB usage is high.
Value type: integer
Value range: 10 to 100
Unit: %
Default value: 95
Impact scope: cell
[键入文字]
Setting
Increasing the value of this parameter reduces the possibility for generating the high RB usage
indication in the uplink, which may cause excessive admission, but the protection for resource
allocation is performed after the admission decision. In addition, when the value of the
parameter is too large, load control actions are taken more slowly.
Decreasing the value of this parameter increases the possibility for generating the high RB
usage indication in the uplink, but the satisfaction rates are compared further for admission
decision. Therefore, this parameter has no obvious impact on admission. In addition, when the
value of the parameter is too small, excessive load control actions may be taken.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, ULRBHIGHTHD=10;
6.2.8 MaxNonGBRBearerNum (Non-GBR max bearer number)
Description
Meaning: This parameter indicates the maximum number of non-GBR services excluding
IMS services. This parameter applies to both the uplink and the downlink.
Value type: integer
Value range:






0 to 560 for a cell with a 1.4 MHz bandwidth
0 to 1800 for a cell with a 3 MHz bandwidth
0 to 3000 for a cell with a 5 MHz bandwidth
0 to 3000 for a cell with a 10 MHz bandwidth
0 to 6000 for a cell with a 15 MHz bandwidth
0 to 6000 for a cell with a 20 MHz bandwidth
Unit: none
Default value: 3000
Impact scope: cell
Setting
Increasing the value of this parameter increases the number of non-GBR services admitted.
Related Commands
LST CELLRACTHD;
MOD CELLRACTHD: LOCALCELLID=0, MAXNONGBRBEARERNUM=0;
[键入文字]
6.3 Random Access Control
6.3.1 RootSequenceIdx (Root sequence index)
Description
Meaning: This parameter indicates the initial logical index number of the ZC root sequence
used in preamble sequence generation.
Value type: interval
Value range: 0 to 837
Unit: none
Default value: 0
Impact scope: cell
Setting
Modifications on this parameter affect the orthogonality of the preamble sequences for the
cell and its neighboring cells.
Related Commands
LST CELL: LocalCellId=0
MOD CELL: LocalCellId=0, RootSequenceIdx=0
6.3.2 PreambleFmt (Preamble format)
Description
Meaning: This parameter indicates the format of a cell preamble.





If this parameter is set to 0, preamble format 0 is used.
If this parameter is set to 1, preamble format 1 is used.
If this parameter is set to 2, preamble format 2 is used.
If this parameter is set to 3, preamble format 3 is used.
If this parameter is set to 4, preamble format 4 is used.
Preamble format 4 is supported only in TDD mode.
Value type: interval
Value range: 0 to 4
Unit: none
Default value: 0
Impact scope: cell
[键入文字]
Setting
Modifications on this parameter affect the PRACH coverage.
Related Commands
LST CELL: LocalCellId=0;
MOD CELL: LocalCellId=0, PreambleFmt=0;
6.3.3 HighSpeedFlag (High speed flag)
Description
Meaning: This parameter indicates the cell type. If this parameter is set to LOW_SPEED,
data is transmitted at a low speed in the cell. If this parameter is set to HIGH_SPEED, data is
transmitted at a high speed in the cell. If this parameter is set to ULTRA_HIGH_SPEED,
data is transmitted at a super high speed in the cell.
Value type: enumeration
Value range: LOW_SPEED(Low speed cell flag), HIGH_SPEED(High speed cell flag),
ULTRA_HIGH_SPEED(Ultra high speed cell flag), EXTRA_HIGH_SPEED(Extra high
speed cell flag)
Value range: 0, 1, 2
Unit: none
Default value: LOW_SPEED
Impact scope: cell
Setting
Modifications on this parameter affect parameter settings related to the UE mobility speed.
Related Commands
LST CELL: LocalCellId=0;
MOD CELL: LocalCellId=0, HighSpeedFlag=LOW_SPEED;
6.4 Mapping from SIBs to SI Messages
6.4.1 SiMapSwitch (SIB mapping SI algorithm switch)
Description
Meaning: This parameter indicates whether the algorithm for the mapping from SIBs to SI
messages is enabled.
Value type: enumeration
[键入文字]
Value range: BOOLEAN_TRUE, BOOLEAN_FALSE
Adjustment step: N/A
Unit: none
Default value: BOOLEAN_TRUE
Parameter relationship: none
Impact scope: cell
Setting
If this parameter is set to BOOLEAN_TRUE, the algorithm for the mapping from SIBs to SI
messages is enabled. This algorithm determines the following items:



Mappings between SIBs and SI messages
Number of times an SI message is transmitted within the transmission window
Code rate
If this parameter is set to BOOLEAN_FALSE, the algorithm for the mapping from SIBs to
SI messages is disabled. In this case, mappings between SIBs and SI messages are the same,
that is, the code rate and the number of times an SI message is transmitted within the
transmission window are the same. If the number of times an SI message is transmitted within
the transmission window is set to a small value, such as 1 or 2, UEs at the cell edge may fail
to properly receive system messages.
You are advised to set this parameter to BOOLEAN_FALSE during downlink transmission
peak rate tests to reduce resources used by system messages and improve the downlink
transmission peak rate.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, SiMapSwitch=x;
6.4.2 Sib2Period (SIB2 period)
Description
Meaning: This parameter indicates the interval at which a system information block type 2
(SIB2) is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF16
Parameter relationship: none
Impact scope: cell
[键入文字]
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB2. Consequently, less system resources are used. However, the delay for the UE to read an
SIB2 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB2s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib2Period =x;
6.4.3 Sib3Period (SIB3 period)
Description
Meaning: This parameter indicates the interval at which an SIB3 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF16
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB3. The SIBs with the same period can be mapped
to the same SI.
Impact scope: cell
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB3. Consequently, less system resources are used. However, the delay for the UE to read an
SIB3 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB3s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib3Period =x;
[键入文字]
6.4.4 Sib4Period (SIB4 period)
Description
Meaning: This parameter indicates the interval at which an SIB4 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF32
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB4. The SIBs with the same period can be mapped
to the same SI.
Impact scope: cell
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB4. Consequently, less system resources are used. However, the delay for the UE to read an
SIB4 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB4s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib4Period =x;
6.4.5 Sib5Period (SIB5 period)
Description
Meaning: This parameter indicates the interval at which an SIB5 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF32
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB5. The SIBs with the same period can be mapped
to the same SI.
Impact scope: cell
[键入文字]
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB5. Consequently, less system resources are used. However, the delay for the UE to read an
SIB5 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB5s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib5Period =x;
6.4.6 Sib6Period (SIB6 period)
Description
Meaning: This parameter indicates the interval at which an SIB6 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF64
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB6. The SIBs with the same period can be mapped
to the same SI.
Impact scope: cell
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB6. Consequently, less system resources are used. However, the delay for the UE to read an
SIB6 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB6s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib6Period =x;
[键入文字]
6.4.7 Sib7Period (SIB7 period)
Description
Meaning: This parameter indicates the interval at which an SIB7 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF64
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB7. The SIBs with the same period can be mapped
to the same SI.
Impact scope: cell
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB7. Consequently, less system resources are used. However, the delay for the UE to read an
SIB7 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB7s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib7Period =x;
6.4.8 Sib8Period (SIB8 period)
Description
Meaning: This parameter indicates the interval at which an SIB8 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF64
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB8. The SIBs with the same period can be mapped
to the same SI.
Impact scope: cell
[键入文字]
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB8. Consequently, less system resources are used. However, the delay for the UE to read an
SIB8 increases.
You are advised to set this parameter to a large value during downlink peak rate tests. This is
to decrease the amount of system resources used and improve the transmission peak rate
while ensuring SIB8s are received properly.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib8Period =x;
6.4.9 Sib10Period (SIB10 period)
Description
Meaning: This parameter indicates the interval at which an SIB10 is transmitted.
Value type: enumeration
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF16
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB10. The SIBs with the same period can be
mapped to the same SI.
Impact scope: cell
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB10. Consequently, less system resources are used. However, the delay for the UE to read
an SIB10 increases.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib10Period =x;
6.4.10 Sib11Period (SIB11 period)
Description
Meaning: This parameter indicates the interval at which an SIB11 is transmitted.
Value type: enumeration
[键入文字]
Value range: RF8, RF16, RF32, RF64, RF128, RF256, RF512
Adjustment step: N/A
Unit: frame
Default value: RF32
Parameter relationship: This parameter and SIWindowLength determine the maximum
number of times an eNodeB transmits an SIB11. The SIBs with the same period can be
mapped to the same SI.
Impact scope: cell
Setting
Increasing the value of this parameter reduces the number of times an eNodeB transmits an
SIB11. Consequently, less system resources are used. However, the delay for the UE to read
an SIB11 increases.
Related Commands
LST CELLSIMAP: LocalCellId=x;
MOD CELLSIMAP: LocalCellId=x, Sib11Period =x;
[键入文字]
7
Power Control
7.1 Uplink Power Control
7.1.1 PUSCH
7.1.1.1 P0NominalPUSCH (P0 nominal PUSCH)
Description
Meaning: This parameter indicates the P0 value of the PUSCH. It is used in open-loop power
control for calculating the UE transmit power.
Value type: integer
Value range: -126 to 24
Adjustment step: 1
Unit: dBm
Default value: -67
Parameter relationship: none
Impact scope: eNodeB
Setting
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the eNodeB throughput. However, interference to neighboring cells also increases
and therefore the network throughput decreases.
Related Commands
LST CELLULPCCOMM
MOD CELLULPCCOMM: LocalCellId=x, P0NominalPUSCH=-67;
[键入文字]
7.1.1.2 PassLossCoeff (Path loss coefficient)
Description
Meaning: This parameter indicates the compensation factor for PUSCH path loss. For details
about this parameter, see 3GPP TS 36.213.
Value type: enumeration
Value range: AL0(0), AL04(0.4), AL05(0.5), AL06(0.6), AL07(0.7), AL08(0.8), AL09(0.9),
AL1(1)
Adjustment step: N/A
Unit: none
Default value: 0.7
Parameter relationship: none
Impact scope: eNodeB
Setting
This parameter is set based on the average network throughput and the edge throughput or set
based on operator's requirements.
Parameter adjustment scenario: none
Impact of parameter setting on network performance: Increasing the value of this parameter
improves the cell throughput. Decreasing the value of this parameter improves the network
throughput.
Related Commands
LST CELLULPCCOMM
MOD CELLULPCCOMM: LocalCellId=0, PassLossCoeff=AL07;
7.1.1.3 DeltaMcsEnabled (Delta-MCS enable or disable indication)
Description
Meaning: This parameter indicates whether the UE transmit power is adjusted based on the
MCS used. It is delivered to a UE in an RRC message.
Value type: enumeration
Value range: UU_DISABLE(Disable), UU_ENABLE(Enable)
Adjustment step: N/A
Unit: none
Default value: UU_DISABLE(Disable)
Parameter relationship: FFS
Impact scope: eNodeB
[键入文字]
Setting
Parameter adjustment scenario: none
Impact of parameter setting on network performance: If this parameter is set to
UU_DISABLE(Disable), UE transmit power is adjusted using only the f(i). If this parameter
is set to UU_ENABLE(Enable), the UE transmit power can be adjusted using a proper MCS.
In this way, eNodeB throughput increases.
Related Commands
LST CELLULPCDEDIC
MOD CELLULPCDEDIC: LocalCellId=x, DeltaMcsEnabled=x;
7.1.1.4 FilterRsrp (RSRP filtering coefficient)
Description
Meaning: This parameter indicates the filtering coefficient used by a UE for path loss
estimation during RSRP measurement.
Value type: enumeration
Value range: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19
Adjustment step: N/A
Unit: none
Default value: 6
Parameter relationship: none
Impact scope: eNodeB
Setting
Increasing the value of this parameter reduces the impact of the RSRP measured this time on
the RSRP filtered.
Related Commands
LST CELLULPCDEDIC
MOD CELLULPCDEDIC: LocalCellId=x, FilterRsrp = x;
7.1.2 PUCCH
7.1.2.1 P0NominalPUCCH (P0 nominal PUCCH)
Description
Meaning: This parameter indicates the UE transmit power expected by the eNodeB on
condition that PUCCH signals are demodulated properly.
Value type: integer
[键入文字]
Value range: -127 to -96
Adjustment step: 1
Unit: dBm
Default value: -105
Parameter relationship: none
Impact scope: eNodeB
Setting
Parameter adjustment scenario: none
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the cell throughput, but reduces the network throughput. Decreasing the value of
this parameter reduces interference to neighboring cells and improves the network throughput.
Related Commands
LST CELLULPCCOMM
MOD CELLULPCCOMM: LocalCellId=x, P0NominalPUCCH=x;
7.1.3 PRACH
7.1.3.1 PreambInitRcvTargetPwr (Preamble initial received target power)
Description
Meaning: This parameter indicates the UE transmit power expected by the eNodeB if PRACH
preamble format 0 is used and requirements for preamble detection performance are met. It is
delivered in a broadcast message.
Value type: integer
Value range: -240, -180
Adjustment step: 2
Unit: dBm
Default value: -104
Parameter relationship: none
Impact scope: eNodeB
Setting
Parameter adjustment scenario: This parameter is updated when the IN at the physical layer
changes and the difference between the reported IN and the reference IN is greater than the
specified threshold.
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the cell throughput, but reduces the network throughput. Decreasing the value of
this parameter reduces interference to neighboring cells and improves the network throughput.
[键入文字]
Related Commands
LST RACHCFG
MOD RACHCFG: LocalCellId=x, PreambInitRcvTargetPwr=x;
7.1.3.2 PwrRampingStep (Power ramping step)
Description
Meaning: This parameter indicates the step by which the transmit power for random access
preambles increases each time after a PRACH access failure.
Value type: integer
Value range: DB0_PWR_RAMPING_STEP(0dB), DB2_PWR_RAMPING_STEP(2dB),
DB4_PWR_RAMPING_STEP(4dB), DB6_PWR_RAMPING_STEP(6dB)
Adjustment step: 2
Unit: dB
Default value: DB2_PWR_RAMPING_STEP(2dB)
Parameter relationship: none
Impact scope: eNodeB
Setting
Parameter adjustment scenario: If a UE fail to access the network through the PRACH after
several attempts, the value of this parameter must be increased to enable the UE to
successfully access the network.
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the cell throughput, but reduces the network throughput. Decreasing the value of
this parameter reduces interference to neighboring cells and improves the network throughput.
Related Commands
LST RACHCFG
MOD RACHCFG: LocalCellId=x, PwrRampingStep=x;
7.1.3.3 DeltaPreambleMsg3 (Delta preamble value for msg3)
Description
Meaning: This parameter indicates the offset between the transmit power for the preamble to
transmit message 3 and the transmit power for the preamble to transmit message 1. It is
delivered in a broadcast message. For details, see the 3GPP TS 36.213.
Value type: enumeration
Value range: -1 to 6
Adjustment step: 1
Unit: dB
[键入文字]
Default value: 4
Parameter relationship: none
Impact scope: eNodeB
Setting
Parameter adjustment scenario: none
Impact of parameter setting on network performance: Decreasing the value of this parameter
reduces the transmit power and the cell throughput. Increasing the value of this parameter
increases interference to neighboring cells and reduces the network throughput.
Related Commands
LST CELLULPCCOMM
MOD CELLULPCCOMM: LocalCellId=x, DeltaPreambleMsg3=x;
7.2 Downlink Power Control
7.2.1 PDSCH
7.2.1.1 PdschPaAdjSwitch (PA adjusting switch)
Description
Meaning: This parameter indicates whether the PDSCH PA algorithm is enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: OFF
Impact scope: cell
Setting
If this parameter is set to ON, the PDSCH PA algorithm is enabled. If this parameter is set to
OFF, the PDSCH PA algorithm is disabled.
Related Commands
LST CELLDLPCPDSCHPA: LOCALCELLID=x;
MOD CELLDLPCPDSCHPA: LocalCellId=x, PdschPaAdjSwitch=x;
[键入文字]
7.2.1.2 PdschSpsPcSwitch (Downlink Semi-Persistent Power Control
Switch)
Description
Meaning: This parameter indicates whether the semi-persistent power control algorithm is
enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: OFF
Impact scope: cell
Setting
If this parameter is set to OFF, each PDSCH resource element (RE) is allocated the same
transmit power. If this parameter is set to ON, PDSCH semi-persistent power control is
enabled to ensure the VoIP services modulated using quadrature phase shift keying (QPSK)
run properly.
Related Commands
LST CELLALGOSWITCH: LOCALCELLID=x;
MOD CELLALGOSWITCH: LocalCellId=x, DlPcAlgoSwitch=PdschSpsPcSwitch-x;
7.2.1.3 ReferenceSignalPwr (Reference signal power)
Description
Meaning: This parameter indicates the power used to transmit reference signals in a cell.
Value type: float
Value range: -600, 500
Adjustment step: 0.1
Unit: dBm
Default value:


FDD: 18.2
TDD: 15.2
Parameter relationship: none
Impact scope: cell
[键入文字]
Setting




Coverage: Increasing the value of this parameter may cause cross-cell coverage.
Decreasing the value of this parameter may cause blind areas.
Interference: Increasing the value of this parameter increases interference to other cells.
Channel estimation: Increasing the value of this parameter increases the channel
estimation accuracy, decreases the demodulation threshold and increases the receive
sensitivity. However, the interference to neighboring cells increases.
Capacity: Increasing the value of this parameter increases the coverage radius and
reduces the power used to transmit data. Accordingly, the system capacity decreases.
In summary, this parameter must be properly set by considering the coverage, capacity,
channel estimation accuracy, and interference.
Related Commands
LST PDSCHCFG: LOCALCELLID=x;
MOD PDSCHCFG: LOCALCELLID=x, ReferenceSignalPwr=x;
7.2.1.4 RaRspPwr (Rach response power)
Description
Meaning: This parameter indicates the offset between the power for the PDSCH to transmit
an RA response and the RS transmit power. It is used to determine the power for the PDSCH
to transmit an RA response.
Value type: float
Value range: 3175 to 3175
Adjustment step: 0.005
Unit: dB
Default value: 0
Impact scope: cell
Setting
Recommended value: -3 for peak transmit power tests and for a system bandwidth of 1.4
MHz, 3 MHz, or 5 MHz in common scenarios and 0 for other system bandwidths in common
scenarios
Increasing the value of this parameter improves the RA success rate. However, interference to
neighboring cells also increases and therefore fewer RBs are available to other PDSCHs
within the same TTI. Accordingly, the cell throughput decreases. In peak transmit power tests,
you are advised to set this parameter to a value the same as Pa.
Related Commands
LST CELLCHPWRCFG: LocalCellId=x;
MOD CELLCHPWRCFG: LocalCellId=x, RaRspPwr=x;
[键入文字]
7.2.1.5 PchPwr (PCH power)
Description
Meaning: This parameter indicates the offset between the power for the PDSCH to transmit
paging messages and the RS transmit power. It is used to determine the power for the PDSCH
to transmit paging messages.
Value type: float
Value range: 3175 to 3175
Adjustment step: 0.005
Unit: dB
Default value: 0
Impact scope: cell
Setting
Recommended value: -3 for peak transmit power tests and for a system bandwidth of 1.4
MHz, 3 MHz, or 5 MHz in common scenarios and 0 for other system bandwidths in common
scenarios
Impact of parameter setting on network performance: Increasing the value of this parameter
improves the success rate of the UE receiving paging messages. However, interference to
neighboring cells also increases and therefore fewer RBs are available to other PDSCHs
within the same TTI. Accordingly, the cell throughput decreases. In peak transmit power tests,
you are advised to set this parameter to a value the same as Pa.
Related Commands
LST CELLCHPWRCFG: LocalCellId=x;
MOD CELLCHPWRCFG: LocalCellId=x, PchPwr=x;
7.2.1.6 Pb (PB)
Description
Meaning: This parameter indicates the ratio of the transmit power of PDSCH type B to the
transmit power of the PDSCH type A. It is used to determine the transmit power of the
PDSCH type B. This parameter is adjusted based on the following table when the RS transmit
power is boosted to balance power between the orthogonal frequency division multiplexing
(OFDM) symbols of the PDSCH type A and the OFDM symbols of the PDSCH type B.
Table 7-1 Mapping between the multiple that the RS transmit power is boosted and ρB/ρA
PB
B /  A
One Antenna Port
Two or Four Antenna Ports
0
1
5/4
1
4/5
1
[键入文字]
2
3/5
3/4
3
2/5
1/2
PB indicates the multiple that the RS transmit power is boosted.
Value type: enumeration
Value range: 0, 1, 2, 3
Adjustment step: N/A
Unit: none
Default value: 0 for a signal-antenna eNodeB and 1 for a dual- or four-antenna eNodeB
Impact scope: cell
Setting
Increasing the value of this parameter increases the RS transmit power, improves the channel
estimation performance, and enhances the PDSCH demodulation performance. However, the
transmit power of the PDSCH type B decreases. This parameter must be properly set to
improve the cell coverage.
Related Commands
LST PDSCHCFG: LocalCellId=x;
MOD PDSCHCFG: LocalCellId=x, Pb=x;
7.2.1.7 CcuPa (Center UE PA)
Description
Meaning: This parameter indicates the center UE PA when the downlink static ICIC algorithm
is enabled.
Value type: enumeration
Value range: -6, -4.77, -3, -1.77, 0, 1, 2, 3
Adjustment step: N/A
Unit: dB
Default value: -6
Impact scope: cell
Setting
Decreasing the value of this parameter reduces the center UE power. Accordingly, the center
UE throughput and the cell throughput decrease. Increasing the value of this parameter
increases interference to neighboring cells. This parameter must be set based on the
simulation results.
[键入文字]
Related Commands
LST CELLDLPCPDSCH: LocalCellId=x;;
MOD CELLDLPCPDSCH: LocalCellId=x, CcuPa=x;
7.2.1.8 CeuPa (Edge UE PA)
Description
Meaning: This parameter indicates the edge UE PA when the downlink static ICIC algorithm
is enabled.
Value type: enumeration
Value range: -6, -4.77, -3, -1.77, 0, 1, 2, 3
Adjustment step: N/A
Unit: dB
Default value: -1.77
Impact scope: cell
Setting
Decreasing the value of this parameter reduces the edge UE transmit power and edge UE
throughput. Increasing the value of this parameter reduces the center UE transmit power and
the cell throughput. This parameter must be set based on the simulation results.
Related Commands
LST CELLDLPCPDSCH: LocalCellId=x;
MOD CELLDLPCPDSCH: LocalCellId=x, CeuPa=x;
7.2.1.9 PaPcOff (PA for even power distribution)
Description
Meaning: This parameter indicates UE PA when the same power is assigned to UEs in a cell,
the PDSCH power control algorithm is disabled, and the static ICIC algorithm is disabled.
Value type: enumeration
Value range: -6, -4.77, -3, -1.77, 0, 1, 2, 3
Adjustment step: N/A
Unit: dB
Default value: -3
Impact scope: cell
[键入文字]
Setting
Recommended value: -3 for dual- and four-antenna eNodeBs, and 0 for single-antenna
eNodeBs
Impact of parameter setting on network performance: When the RS transmit power remains
unchanged, increasing the value of this parameter increases the power of all UEs in a cell and
improves the MCS level. However, the cell throughput may decrease because the cell
bandwidth is limited.
Related Commands
LST CELLDLPCPDSCHPA: LOCALCELLID=x;
MOD CELLDLPCPDSCHPA: LocalCellId=x, PaPcOff=x;
7.2.2 PDCCH
7.2.2.1 DediDciPwrOffset (DCI power offset for dedicated control)
Description
Meaning: This parameter indicates the offset between the power used to transmit downlink
control information (DCI) and the RS transmit power when the PDCCH carries dedicated
control information.
Value type: enumeration
Value type: float
Value range: -150, 150
Adjustment step: 0.1
Unit: dB
Impact scope: cell
Setting
Recommended value: -30
Impact of parameter setting on network performance: Increasing the value of this parameter
increases the PDCCH transmit power and improves the coverage. However, the interference
to neighboring cells increases. Therefore, more power is used. Decreasing the value of this
parameter increases the possibility of forming coverage holes.
Related Commands
LST CELLDLPCPDCCH: LocalCellId=x;
MOD CELLDLPCPDCCH: LocalCellId=x, DediDciPwrOffset=x;
[键入文字]
7.2.2.2 PdcchPcSwitch (PdcchBoundaryPcSwitch)
Description
Meaning: P This parameter indicates whether the PDCCH border power control function is
enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: ON
Impact scope: cell
Setting
If this parameter is set to OFF, the PDCCH border power control function is disabled and the
power at the cell border is not adjusted. In addition, the PDCCH supports only a few encoding
rates and does not support the HARQ feature. Therefore, UE demodulation performance may
be different if this parameter is set to OFF. If this parameter is set to ON, the PDCCH border
power control function is enabled to ensure that each UE has the same demodulation
performance.
Related Commands
LST CELLALGOSWITCH: LOCALCELLID=x;
MOD CELLALGOSWITCH: LocalCellId=x, DlPcAlgoSwitch=PdcchPcSwitch-x;
7.2.3 PHICH
7.2.3.1 PhichInnerLoopPcSwitch (PHICH Power Control Switch)
Description
Meaning: This parameter indicates whether the PHICH inner-loop power control function is
enabled.
Value type: enumeration
Value range: ON, OFF
Adjustment step: N/A
Unit: none
Default value: OFF
Impact scope: cell
[键入文字]
Setting
If this parameter is set to ON, the PHICH inner-loop power control function is enabled. If this
parameter is set to OFF, the PHICH inner-loop power control function is disabled and only
PHICH initial transit power is used.
If this parameter is set to ON, the eNodeB controls the physical channel to make the receive
SINR to converge to the target SINR.
Related Commands
LST CELLALGOSWITCH: LOCALCELLID=x;
MOD CELLALGOSWITCH: LocalCellId=x, DlPcAlgoSwitch=PhichInnerLoopPcSwitch-x;
7.2.3.2 PwrOffset (Phich Pc Off Power Offset)
Description
Meaning: This parameter indicates the offset between the PHICH transmit power and the RS
transmit power. This parameter is used when PHICH power control is disabled.
Value type: float
Value range: -150, 150
Adjustment step: 0.1
Unit: dB
Default value: 0
Parameter relationship: none
Impact scope: cell
Setting
Recommended value: -30 for a system bandwidth of 1.4 MHz, 3 MHz, or 5 MHz in common
scenarios and 0 for other system bandwidths in common scenarios
Impact of parameter setting on network performance: Increasing the value of this parameter
improves the PHICH demodulation performance. However, the number of UEs served by the
PHICH may decrease because the power is limited. In addition, increasing the value of this
parameter increases interference to neighboring cells.
Related Commands
LST CELLDLPCPHICH: LocalCellId=x,;
MOD CELLDLPCPHICH: LocalCellId=x, PwrOffset=x;
[键入文字]
7.2.4 PCFICH
7.2.4.1 PcfichPwr (PCFICH power)
Description
Meaning: This parameter indicates the offset between the PCFICH transmit power and the RS
transmit power. It is used to determine the PCFICH transmit power.
Value type: float
Value range: -3175, 3175
Adjustment step: 0.005
Unit: dB
Parameter relationship: none
Impact scope: cell
Setting
Recommended value:


LTE FDD: -600
LTE TDD: 0 for bandwidths of 10 MHz, 15 MHz, and 20 MHz, and -600 for other
bandwidths
Impact of parameter setting on network performance: Increasing the value of this parameter
improves the coverage. However, the interference to neighboring cells increases. Therefore,
more power is used. Decreasing the value of this parameter increases the possibility of
forming coverage holes.
Related Commands
LST CELLCHPWRCFG: LocalCellId=x;
MOD CELLCHPWRCFG: LocalCellId=x, PcfichPwr=x;
7.2.5 PBCH
7.2.5.1 PbchPwr (PBCH power)
Description
Meaning: This parameter indicates the offset between the PBCH transmit power and the RS
transmit power. It is used to determine the PBCH transmit power.
Value type: float
Value range: -3175, 3175
Adjustment step: 0.005
Unit: dB
Default value: -600
[键入文字]
Parameter relationship: none
Impact scope: cell
Setting
Increasing the value of this parameter improves the coverage. However, the interference to
neighboring cells increases. Therefore, more power is used. Decreasing the value of this
parameter increases the possibility of forming coverage holes.
Related Commands
LST CELLCHPWRCFG: LocalCellId=x;
MOD CELLCHPWRCFG: LocalCellId=x, PbchPwr=x;
7.2.6 SCH
7.2.6.1 SchPwr (SCH power)
Description
Meaning: This parameter indicates the offset between the synchronization signal transmit
power and the RS transmit power. It is used to determine the synchronization signal transmit
power.
Value type: float
Value range: -3175, 3175
Adjustment step: 0.005
Unit: dB
Default value: 0
Parameter relationship: none
Impact scope: cell
Setting
Recommended value: -600 for peak transmit power tests and for a system bandwidth of 1.4
MHz, 3 MHz, or 5 MHz in common scenarios and 0 for other system bandwidths in common
scenarios
Impact of parameter setting on network performance: Increasing the value of this parameter
improves the coverage. However, the interference to neighboring cells increases. Therefore,
more power is used. Decreasing the value of this parameter increases the possibility of
forming coverage holes.
Related Commands
LST CELLCHPWRCFG: LocalCellId=x;
MOD CELLCHPWRCFG: LocalCellId=x, SchPwr=x;
[键入文字]
7.2.7 PRS
7.2.7.1 PrsPwr (Prs power)
Description
Meaning: This parameter indicates the offset between the pilot transmit power and the RS
transmit power.
Value type: float
Value range: -3175, 3175
Adjustment step: 0.005
Unit: dB
Default value: 0
Parameter relationship: none
Impact scope: cell
Setting
none
Related Commands
LST CELLCHPWRCFG: LocalCellId=x;
MOD CELLCHPWRCFG: LocalCellId=x, PrsPwr=x;
[键入文字]
[键入文字]
A
Acronyms and Abbreviations
A
AMC
adaptive modulation and coding
ANR
automatic neighbor relation
AQM
active queue management
C
CEU
cell edge user
CPU
central processing unit
CQI
channel quality indicator
D
DC
direct current
DCI
downlink control information
DMRS
demodulation reference signal
DRX
discontinuous reception
E
EPF
enhanced proportional fair
F
FDD
frequency division duplex
I
IBLER
initial block error rate
[键入文字]
ICIC
inter-cell interference coordination
IoT
Interference Over Thermal
M
MCS
modulation and coding scheme
MIMO
multiple-input multiple-output
MRO
mobility robust optimization
O
OC
orthogonal cover
P
PDCCH
physical downlink control channel
PF
proportional fair
PUCCH
physical uplink control channel
Q
QoS
quality of service
R
RAN
radio access network
RR
round robin
S
SIB
system information block
SINR
signal to interference plus noise ratio
SR
scheduling request
SRI
scheduling request indication
SRS
sounding reference signal
T
TCP
Transmission Control Protocol
TDD
time division duplex
[键入文字]
TRM
transceiver module
TTI
transmission time interval
V
VoIP
voice over Internet Protocol