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4‑5x
TS 23.272
(SA2)
★
CSFB – Circuit Switched FallBack in EPS
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for a better overview, the Table of Contents (ToC) is reproduced
V15.0.0 (PDF)
2017/12 107 p.
V14.2.0
2017/12 107 p.
V13.6.0
2017/12 107 p.
V12.6.0
2015/06 103 p.
V11.10.0
2015/06 102 p.
V10.15.0
2014/06 86 p.
V9.15.0
2013/09 76 p.
V8.12.0
2012/06 59 p.
Rapporteur:
Ms. Demel, Sabine
This document defines the Stage 2 architecture and specification for the CS Fallback and for SMS over SGs for EPS or CS Fallback and SMS over S102.
full Table of Contents for
TS 23.272
Word version: 15.0.0
1
Scope
2
References
3
Definitions and abbreviations
4
Overall Description
5
Mobility Management
6
Mobile Originating Call
7
Mobile Terminating Call
8
Other CS Services
B
[N] CS Fallback to 1xRTT
C
[N] SMS in MME
D
Change history
1
Scope
Word-p. 8
2
References
3
Definitions and abbreviations
Word-p. 10
3.1
Definitions
3.2
Abbreviations
4
Overall Description
Word-p. 11
4.1
General Considerations
4.2
Reference Architecture
4.2.1
Reference points
Word-p. 12
4.3
Functional entities
4.3.1
UE
4.3.2
MME
4.3.3
MSC
Word-p. 14
4.3.4
E-UTRAN
4.3.5
SGSN
Word-p. 15
4.3.6
BSS
4.3.7
RNS
[R10]
4.4
Control plane
Word-p. 16
4.4.1
MME - MSC Server
4.5
Co-existence with IMS services
4.6
Emergency Calls
4.6.1
General
[R9]
4.6.2
Procedures to handle emergency call setup with IMSI
[R9]
4.6a
Interaction with IMS Emergency session
[R9]
Word-p. 17
4.7
CSFB Priority Call Handling
[R10]
4.8
CS services handling in specific cases
[R10]
Word-p. 18
4.8.1
SGs paging without LAI
4.8.2
Handling of SGs paging when MME cannot retrieve the S-TMSI
5
Mobility Management
5.1
General
5.1A
TAI list and LAI allocation
[R9]
5.2
Attach procedure
Word-p. 19
5.3
Detach procedure
Word-p. 21
5.3.1
UE-initiated Detach procedure
5.3.1A
UE-initiated Detach procedure for GERAN/UTRAN with ISR activated
Word-p. 22
5.3.2
MME-initiated Detach procedure
5.3.2A
SGSN-initiated Detach procedure with ISR activated
Word-p. 23
5.3.3
HSS-initiated Detach procedure
5.3.4
Administration of the MME - MSC/VLR Association
5.4
TA/LA Update procedure
Word-p. 24
5.4.0
General
5.4.1
Combined TA/LA Update Procedure
5.4.2
Periodic TA and LA Update Procedure
Word-p. 26
5.4.3
Non-EPS Alert procedure
5.4.4
Void
5.5
Idle Mode Signalling Reduction
Word-p. 27
5.6
Mobility Management for SMS over SGs only UEs
Word-p. 28
5.7
Access to CS services after selecting a non-3GPP access
[R11]
6
Mobile Originating Call
6.1
General
6.2
Mobile Originating call in Active Mode - PS HO supported
Word-p. 29
6.3
Mobile Originating call in Active Mode - No PS HO support
Word-p. 31
6.4
Mobile Originating call in Idle Mode
Word-p. 35
6.5
Returning back to E-UTRAN
Word-p. 36
6.6
Mobile Originated or Mobile terminated call rejected by the MME
[R9]
Word-p. 37
7
Mobile Terminating Call
Word-p. 38
7.1
General
7.2
Mobile Terminating call in idle mode
7.3
Mobile Terminating call in Active Mode - PS HO supported
Word-p. 41
7.4
Mobile Terminating call in Active Mode - No PS HO support
Word-p. 44
7.5
Roaming Retry for CS fallback
Word-p. 48
7.5a
Roaming Forwarding for CS fallback
[R10]
Word-p. 50
7.5b
Coexistence of Roaming Retry and Roaming Forwarding for CS fallback
[R10]
Word-p. 52
7.6
Returning back to E-UTRAN
7.7
Interaction with ISR
7.7.1
Void
7.7.2
Mobile Terminating Call when ISR is active and SGs is active between MSC/VLR and MME
Word-p. 53
7.7.3
Void
7.8
Mobile Terminating Call when SGs is not active
Word-p. 54
8
Other CS Services
8.1
General
8.2
Short Message Service (SMS)
8.2.1
General
8.2.2
Mobile originating SMS in Idle Mode
8.2.3
Mobile originating SMS in Active Mode
Word-p. 56
8.2.3a
Multiple Mobile originating SMSs
8.2.4
Mobile terminating SMS in idle mode
8.2.4a
Mobile Terminated SMS in extended Idle mode DRX and in PSM
[R13]
Word-p. 57
8.2.4a.1
General
8.2.4a.2
Procedure for Deployment Option1 and Deployment Option 2
Word-p. 58
8.2.4a.3
Procedure for Deployment Option 3
Word-p. 60
8.2.5
Mobile terminating SMS in Active Mode
Word-p. 61
8.2.5a
Multiple Mobile terminating SMSs
8.2.5b
Simultaneous Mobile terminating and Mobile originating SMSs
8.2.5c
Unsuccessful Mobile terminating SMS delivery attempt
8.2.5d
Non-SMS Mobile terminating activity during SMS delivery
8.2.5e
Non-SMS Mobile originating activity during SMS delivery
Word-p. 62
8.2.5f
Mobile Terminating SMS when ISR is active and SGs is active between MSC/VLR and MME
8.2.6
Co-Existence with SMS over generic 3GPP IP access
8.3
Location Services (LCS)
8.3.1
MO-LR procedure
8.3.1.1
General
[R10]
8.3.1.2
MO-LR in Active Mode with IMS VoIP session - PS HO supported
[R10]
Word-p. 63
8.3.1.3
MO-LR in Active Mode with IMS VoIP session - No PS HO supported
[R10]
Word-p. 64
8.3.2
MT-LR procedure
8.3.2.1
MT-LR procedure if UE is not in IMS VoIP session
[R10]
8.3.2.2
MT-LR procedure while UE is in IMS VoIP session
[R10]
Word-p. 65
8.3.3
NI-LR procedure
Word-p. 66
8.3.4
Returning back to E-UTRAN
8.3.5
Co-Existence with Other Location Services
8.3.5.1
Co-Existence with SUPL
8.4
Other CS Services
8.4.0
General
[R9]
8.4.1
Mobile-Initiated CS Services
8.4.1.1
Mobile-Initiated CS Services if UE is not in IMS VoIP session
[R11]
8.4.1.2
Mobile-Initiated CS Services while UE is in IMS VoIP session
[R11]
Word-p. 67
8.4.2
NW-Initiated CS Services
8.4.2.1
NW-Initiated CS Services if UE is not in IMS VoIP session
[R11]
8.4.2.2
NW-Initiated CS Services while UE is in IMS VoIP session
[R11]
Word-p. 68
8.4.3
Returning back to E-UTRAN
Word-p. 69
A
Void
B
(Normative) CS Fallback to 1xRTT
Word-p. 71
B.1
Overall Description
B.1.1
General Considerations
B.1.2
Reference Architecture
B.1.2.1
Reference points
Word-p. 72
B.1.3
Functional entities
B.1.3.1
UE
B.1.3.2
MME
B.1.3.3
E-UTRAN
Word-p. 73
B.1.4
Co-existence with IMS services
B.1.5
CSFB Priority Call Handling
[R10]
B.2
Procedures
Word-p. 74
B.2.1
Mobility Management
B.2.1.1
1x RTT CS Pre-Registration over EPS Procedure
B.2.1.2
S102 Tunnel Redirection
Word-p. 75
B.2.1.3
UE-initiated Detach Procedure
[R9]
Word-p. 76
B.2.2
Mobile Originating Call in Active Mode
B.2.2a
Mobile Originating call in Idle Mode
Word-p. 78
B.2.3
Mobile Terminating Call
B.2.3a
Enhanced CS fallback to 1xRTT Procedure
[R9]
Word-p. 80
B.2.3a.1
General
B.2.3a.2
Mobile Originating Call without concurrent PS handover, or with concurrent non-optimised PS handover or optimised idle-mode PS handover
Word-p. 81
B.2.3a.3
Mobile Originating Call with concurrent optimised PS handover
Word-p. 84
B.2.3a.4
Mobile Terminating Call without PS handover, or with concurrent non-optimised PS handover or optimised idle-mode PS handover
Word-p. 85
B.2.3a.5
Mobile Terminating Call with concurrent optimised PS handover
Word-p. 86
B.2.3a.6
Interaction between enhanced CS Fallback to 1xRTT and optimised PS handover
Word-p. 87
B.2.3b
Mobile Originated or Mobile terminated call rejected by the MME
[R9]
B.2.4
Short Message Service (SMS)
Word-p. 89
B.2.4.1
General
B.2.4.2
Mobile originating SMS
B.2.4.3
Mobile terminating SMS
Word-p. 90
B.2.5
Emergency Calls
Word-p. 91
B.3
CS Fallback for UEs with dual Rx configuration
[R9]
B.3.1
General Considerations
B.3.2
Procedures for leaving E-UTRAN
Word-p. 92
B.3.3
Procedures for returning to E-UTRAN
Word-p. 93
C
(Normative) SMS in MME
[R11]
C.1
General
C.2
Architecture
C.3
Reference Points
Word-p. 94
C.3.1
General
C.3.2
S6a
C.3.3
S6c
C.3.4
SGd
Word-p. 95
C.4
Network Entities
C.4.1
General
C.4.2
MME
C.4.3
HSS
C.5
Roaming considerations
Word-p. 96
C.6
Unsuccessful Mobile-Terminated SMS Transfer
C.7
Information storage
Word-p. 97
C.7.1
HSS
C.7.2
MME
C.8
Registration of MME for SMS
Word-p. 98
C.8.1
Request for registration
C.8.2
Removal of registration of MME for SMS
Word-p. 99
C.8.2.0
General
C.8.2.1
HSS-initiated removal of registration of MME for SMS
Word-p. 100
C.8.2.2
MME-initiated removal of registration of MME for SMS
D
Change history
Word-p. 101