CSFB FROM LTE WITH DMCR &
Without DMCR
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
1. Introduction
CSFB subscribers roam with preference on LTE access, no CS-voice service available (only
PS based services)
Fallback triggered to overlapping CS domain whenever voice services are requested and
resumed LTE access for PS services after call completion.
CSFB is enhanced with support for DMCR to decrease the call set up time. If
the DMCR capability is on and the DMCR is activated in SIB3 then the UE is allowed to send
message on RACH or act on received message on FACH before complete reading of
SIB11/SIB12/SIB19.
The feature Deferred Measurement Control Reading provides faster call setup time
for CS Fallback from LTE with release with redirect.
1. Purpose
This instruction is used for the CSFB From LTE with DMCR (FAJ 121 1610 ) activation
procedure by MOS Script on software level W12B in RNC side.
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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DMCR Feature
The following Feature/parameter
Node
Mo
Parameter
Required
RNC
RncFeature
CsFallbackLte
1
RNC
UtranCell
dmcrEnabled
1
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Parameter at RNC
Node
Mo
Parameter
New
RNC
Rnc Feature
LteCellReselection.featureState
1 (Activate)
RNC
Sid
schedulingBlockEnabled
1
RNC
Sid
sib19.sib19RepPeriod
256
RNC
UtranCell
AbsPrioCellRes.cellReselectionPriority
2
RNC
Sid
SIB11
12
RNC
Sid
sib5RepPeriod
32
RNC
RncFunction
loadSharingRrcEnabled
TRUE
RNC
UtranRelation
loadSharingCandidate
define
RNC
UtranRelation
loadSharingThreshold
0
RNC
UtranCell
interFreqFddMeasIndicator
0
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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1.CSFB triggered UE release to WDCMA while user is Idle Mode due to inactivity - Mobile
originating without DMCR.
DESCRIPTION
CS fallback triggered UE release to WCDMA - Idle Mode.
1.PRECONDITION
•Enable licence key file CsFallbackLte (CXC 403 0106) in the RNC
•The timer on the eNodeB to control user inactivity is “tInactivity Timer” which is set to 10 sec. UE performs the
normal attach and goes into idle state due to user inactivity.
set rcs tinactivitytimer 10
•The deactivation of DMCR feature done at the Utrancell level.
set Utrancell=x dmcrenabled 0
1.TEST INSTRUCTION
Action: Attach relevant WCDMA UE and LTE UE.
Action: Make LTE UE IDLE Mode
Action: Make call from WCDMA UE to LTE UE
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB Procedure
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB Delay
CSFB call setup time standards
MT：Extend service request To Alerting.
Delay
2.2 s from extended service request to CC Alerting
Delay 3.6 s from CC alerting to CC connect.
Total CSFB time is 5.8 s
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB triggered UE release to WDCMA while user is Idle Mode due to inactivity - Mobile
originating with DMCR
1.DESCRIPTION
1.Verify the gain of 1 second in CS call setup using CSFB with DMCR in WCDMA/LTE test environment.
2.PRECONDITION
.
•
•
•
Enable licence key file CsFallbackLte (CXC 403 0106) in the RNC
The timer on the eNodeB to control user inactivity is “tInactivity Timer” which is set to 10 sec. UE performs the normal attach and goes into idle
state due to user inactivity
The activation of DMCR feature done at the Utrancell level.
set Utrancell=x dmcrenabled 1
We should see SIB3 message to notify about feature activation
1.TEST INSTRUCTION
Action: Attach relevant WCDMA UE and LTE UE.
Action: Make LTE UE IDLE mode
Action: Make call from WCDMA UE to LTE UE
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB Delay
CSFB call setup time standards
MT：Extend service request To Alerting.
Delay
2.6 s from extended service request to CC Alerting
Delay 3.9 s from CC alerting to CC connect.
Total CSFB time is 6.5 s
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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TC-3 CSFB triggered UE release to WDCMA while PS call is happening - Mobile originating without DMCR.
DESCRIPTION
While PS call on LTE UE, CS fallback triggered UE release to WCDMA.
PRECONDITION
•Enable licence key file CsFallbackLte (CXC 403 0106) in the RNC
•The deactivation of DMCR feature done at the Utrancell level.
set Utrancell=x dmcrenabled 0
Action: Attach relevant WCDMA UE and LTE UE.
Action: Make PS call on LTE UE
Action: Make call from WCDMA UE to LTE UE
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB Procedure
1.MT CSFB call attempt with extend service request.
The UTRAN frequency is
included
in RRC
Release
Abhijeet
Kumar NAK
2014 Connection
- PRESENTATION
TITLE - message.
DEPARTMENT AUTHOR
-
2014-04-26
16
CSFB Procedure
2. Routing Area Update
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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3. Authentication, call proceeding and radio bearer setup.
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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. Call alerting and setup success
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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2nd call from WCDMA UE to LTE UE in PS mode
CSFB Time : 6.4 S
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB Delay
CSFB call setup time standards
MT：Extend service request To Alerting.
Delay
2.6 s from extended service request to CC Alerting
Delay 3.8 s from CC alerting to CC connect.
Total CSFB time is 6.4 s
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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1.CSFB triggered UE release to WDCMA while PS call is happening - Mobile originating with DMCR.
1.Verify the gain of 1 second in CS call setup using CSFB with DMCR in WCDMA/LTE test
environment.
2.PRECONDITION
•Ensure that the preconditions as tested in 3.1 are followed for the appropriate frequency
eNodeB/eUtranCell being tested.
•Enable licence key file CsFallbackLte (CXC 403 0106) in the RNC
•The activation of DMCR feature done at the Utrancell level.
set Utrancell=x dmcrenabled 1
Action: Attach relevant WCDMA UE and LTE UE.
Action: Make PS call on LTE UE
Action: Make call from WCDMA UE to LTE UE
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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CSFB Delay
CSFB call setup time standards
MT：Extend service request To Alerting.
Delay
2.47 s from extended service request to CC Alerting
Delay 3.23 s from CC alerting to CC connect.
Total CSFB time is 5.7 s
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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Result
IDLE: DMCE Disabled total CSFB time 5.8 s
IDLE : DMCR enabled Total CSFB time 6.5 s
PS: DMCR disabled Total CSFB time 6.4
PS: DMCR enabled Total CSFB time 5.7 s
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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THANKS
Abhijeet Kumar NAK 2014 - PRESENTATION TITLE - DEPARTMENT AUTHOR -
2014-04-26
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