TS 23.237
SA2
★
IMS Service Continuity
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for a better overview, the Table of Contents (ToC) is reproduced
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Rapporteur: Mr. Song, Jae seung LG Electronics Inc.
IMS based services can be provided with use of PS bearers and CS bearers for the media. When using CS bearer for
media transport of IMS sessions, interworking solutions for IMS Centralized Services (ICS) as specified in TS 23.292 are used. ICS allows IMS sessions using CS bearers to be treated as standard IMS sessions for the purpose of IMS Service Continuity (ISC). ICS defines signalling mechanisms between the UE and IMS for transport of information as needed for service continuity when using CS access for media transport.
Both ICS and ISC specify functions which are provided by a SIP application server.
This TS specifies the architectural requirements and procedures for delivery of IMS Service Continuity (ISC).
The solution is restricted to service continuity using IMS procedures, i.e. mobility mechanisms on the IP-CAN level are not within the scope of this specification.
short Table of Contents for TS 23.237 Word version: 16.3.0
each title links to the equivalent title in the full ToC
1 Scope Word-p. 11
2 References Word-p. 11
3 Definitions, symbols and abbreviations Word-p. 13
4 High level principles and architectural requirements Word-p. 15
5 Architecture model and reference points Word-p. 23
6 Procedures and flows for Access Transfer Word-p. 33
6.0 Introduction Word-p. 33
6.1 Registration Word-p. 33
6.2 Origination and Termination Word-p. 36
6.3 Access Transfer Word-p. 45
6.4 Operator Policy and User Preferences 
Word-p. 102
6.5 Execution of supplementary services Word-p. 103
6a Procedures and flows for Inter-UE Transfer [R9] Word-p. 106
6a.0 Introduction Word-p. 106
6a.1 IUT general procedures Word-p. 106
6a.2 Information flows for Collaborative Session establishment Word-p. 106
6a.3 Media Transfer within Collaborative Session Word-p. 111
6a.4 Media adding/deleting/modifying within Collaborative Session Word-p. 119
6a.4a Transfer of Collaborative Session Control [R10] Word-p. 134
6a.5 Collaborative Session release Word-p. 141
6a.6 Inter-UE Transfer without establishing a Collaborative Session Word-p. 142
6a.7 Execution of supplementary services Word-p. 145
6a.8 IUT target discovery Word-p. 148
6a.9 Inter-UE Transfer Initiated by Target UE [R10] Word-p. 151
6a.10 Media Flow Replication by network [R10] Word-p. 158
6a.11 Session Replication by remote party [R10] Word-p. 164
6a.12 User authorisation and preferences [R10] Word-p. 168
6b Void
6c Procedures and flows for SRVCC Emergency Session [R9] Word-p. 169
6d Procedures and flows for DRVCC Emergency Session for WLAN [R14] Word-p. 176
7 Security Word-p. 178
8 Charging Word-p. 178
A Controller UE and Controllee UE operations [R9] Word-p. 180
B (Normative) Additional enhancements for SRVCC [R14] Word-p. 182
C (Normative) ATCF in Architectures without IMS-level roaming interfaces [R16] Word-p. 185
D Change history Word-p. 188
Word-p. 102
6.5 Execution of supplementary services Word-p. 103
6a Procedures and flows for Inter-UE Transfer [R9] Word-p. 106
6a.0 Introduction Word-p. 106
6a.1 IUT general procedures Word-p. 106
6a.2 Information flows for Collaborative Session establishment Word-p. 106
6a.3 Media Transfer within Collaborative Session Word-p. 111
6a.4 Media adding/deleting/modifying within Collaborative Session Word-p. 119
6a.4a Transfer of Collaborative Session Control [R10] Word-p. 134
6a.5 Collaborative Session release Word-p. 141
6a.6 Inter-UE Transfer without establishing a Collaborative Session Word-p. 142
6a.7 Execution of supplementary services Word-p. 145
6a.8 IUT target discovery Word-p. 148
6a.9 Inter-UE Transfer Initiated by Target UE [R10] Word-p. 151
6a.10 Media Flow Replication by network [R10] Word-p. 158
6a.11 Session Replication by remote party [R10] Word-p. 164
6a.12 User authorisation and preferences [R10] Word-p. 168
6b Void
6c Procedures and flows for SRVCC Emergency Session [R9] Word-p. 169
6d Procedures and flows for DRVCC Emergency Session for WLAN [R14] Word-p. 176
7 Security Word-p. 178
8 Charging Word-p. 178
A Controller UE and Controllee UE operations [R9] Word-p. 180
B (Normative) Additional enhancements for SRVCC [R14] Word-p. 182
C (Normative) ATCF in Architectures without IMS-level roaming interfaces [R16] Word-p. 185
D Change history Word-p. 188
