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TS 29.118 (CT1)
MME-VLR SGs Interface

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for a better overview, the Table of Contents (ToC) is reproduced
V15.2.0 (PDF)  2018/03  77 p.
V14.2.0  2017/12  79 p.
V13.7.0  2017/12  78 p.
V12.7.0  2014/12  75 p.
V11.11.0  2014/06  71 p.
V10.13.0  2014/06  65 p.
V9.9.0  2013/09  59 p.
V8.11.0  2012/09  57 p.

Rapporteur:  Mr. Shu, Lin

CS Fallback in the Evolved Packet System (EPS) enables the provisioning of CS-domain services (e.g. voice call, Location Services (LCS) or supplementary services) by reuse of CS infrastructure when the UE is served by E-UTRAN. Additionally, SMS delivery via the CS core network is realized without CS fallback.
This TS specifies the procedures and the SGs Application Part (SGsAP) messages used on the SGs interface between the Mobility Management Entity (MME) in the EPS and the Visitor Location Register (VLR), to allow location management coordination and to relay certain messages related to GSM circuit switched services over the EPS system. This TS also specifies the use of Stream Control Transmission Protocol (SCTP) for the transport of SGsAP messages.

full Table of Contents for  TS 29.118  Word version:   15.2.0

 

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1  ScopeWord-p. 9
2  References
3  Definitions and abbreviationsWord-p. 10
4  Description of the SGs association between a VLR and an MME
5  Procedures for SGsWord-p. 15
5.1  Paging for non-EPS services procedure
5.2  Location update for non-EPS services procedure
5.3  Non-EPS alert procedureWord-p. 29
5.4  Explicit IMSI detach from EPS servicesWord-p. 31
5.5  Explicit IMSI detach from non-EPS services
5.6  Implicit IMSI detach from non-EPS services
5.7  VLR failure procedure
5.8  MME failure procedure
5.9  HSS failure
5.10  MM information procedureWord-p. 37
5.11  Procedure for tunnelling of NAS messagesWord-p. 38
5.12  Service request procedureWord-p. 40
5.13  Service abort procedureWord-p. 41
5.14  Implicit IMSI detach from EPS services [R10]
5.15  UE fallback supervision procedure [R12]
5.16  Procedure for MO CSFB indication [R11]Word-p. 43
6  SGs transportUp
7  Error handlingWord-p. 44
8  Message functional definitions and contents
8.1  SGsAP-ALERT-ACK message
8.2  SGsAP-ALERT-REJECT message
8.3  SGsAP-ALERT-REQUEST message
8.4  SGsAP-DOWNLINK-UNITDATA messageWord-p. 47
8.5  SGsAP-EPS-DETACH-ACK message
8.6  SGsAP-EPS-DETACH-INDICATION message
8.7  SGsAP-IMSI-DETACH-ACK messageWord-p. 48
8.8  SGsAP-IMSI-DETACH-INDICATION message
8.9  SGsAP-LOCATION-UPDATE-ACCEPT message
8.10  SGsAP-LOCATION-UPDATE-REJECT messageWord-p. 49
8.11  SGsAP-LOCATION-UPDATE-REQUEST messageWord-p. 50
8.12  SGsAP-MM-INFORMATION-REQUESTUp
8.13  SGsAP-PAGING-REJECT message
8.14  SGsAP-PAGING-REQUEST message
8.15  SGsAP-RESET-ACK message
8.16  SGsAP-RESET-INDICATION message
8.17  SGsAP-SERVICE-REQUEST messageWord-p. 55
8.18  SGsAP-STATUS messageWord-p. 56
8.19  SGsAP-TMSI-REALLOCATION-COMPLETE message
8.20  SGsAP-UE-ACTIVITY-INDICATION message
8.21  SGsAP-UE-UNREACHABLE messageWord-p. 57
8.22  SGsAP-UPLINK-UNITDATA message
8.23  SGsAP-RELEASE-REQUEST message
8.24  SGsAP-SERVICE-ABORT-REQUEST message [R10]
8.25  SGsAP-MO-CSFB-INDICATION message [R11]Word-p. 59
9  Information element coding
10  List of system variables
A  Change historyWord-p. 74

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