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TR 23.893 (SA2)
Feasibility study on
Multimedia Session Continuity

ToC   3GPP‑Page   Help    
V8.0.0 (Wzip)  2008/06  62 p.

Rapporteur:  Mr. Song, Jae seung
See also:  –

This study intends to investigate the general problem of IMS-level multimedia session continuity, including potential enhancements to IMS specifications that can improve the multimedia session continuity experience. In particular, the following topics will be studied:
  • Identification of session continuity scenarios;
  • PS-PS session continuity;
  • PS-PS session continuity in conjunction with PS-CS continuity;
  • Session continuity between 3GPP and non-3GPP systems;
  • Network-initiated Multimedia Session Transfer;
  • Mobility of media components of a session between different terminals under the control of the same user;
  • Coexistence and/or potential interactions with possible underlying mobility solutions defined by 3GPP. The solutions developed within this study should not have any impacts to underlying mobility solutions.
In the end this study will provide conclusions with respects to what further specification work is required in order to fulfil the IMS-level Multimedia Session Continuity requirements and improve the overall service continuity experience.


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1 Scope2 References3 Definitions and abbreviations3.1 Definitions3.2 Abbreviations4 Architectural Requirements and Assumptions4.1 Basic Assumptions4.2 Architectural Requirements4.3 Service Requirements5 Multimedia Session Continuity Scenarios5.1 General5.2 PS-PS session continuity5.3 PS-PS session continuity in conjunction with PS-CS continuity5.4 Mobility of media components of a session between different terminals under the control of the same user6 Architecture6.1 General Principles and Description6.2 MMSC Architecture Reference Model6.3 Session Anchoring6.4 Session Transfer6.5 Information flows6.6 Network-initiated Multimedia Session Transfer7 Impacts and Enhancements to the IM CN subsystem7.1 MMSC and CSI interworking8 Coexistence and/or potential interactions with underlying mobility solutions8.1 General8.2 Impact of underlying mobility mechanisms on IMS9 Conclusion9.1 Conclusion on multimedia session continuity scenarios9.2 Conclusion on MMSC architecture and anchoring solution9.3 Conclusion on session transfer operator policy9.4 Conclusion on the relationship between ICS and MMSC9.5 Conclusion on specification of session split/merger functionality9.6 Conclusion on T-ADS and session split/merger functionality for MMSC and ICS9.7 Conclusion on the applicable scope of MMSC9.8 Conclusion on Single Radio MMSC9.9 Conclusion on Session Transfer Information9.10 Conclusion on UE Transfer information flows9.11 Conclusion on Keep and Release Control Mechanism in UE Transfer ModeA Change history


1  ScopeWord-p. 6
2  References
3  Definitions and abbreviationsWord-p. 7
4  Architectural Requirements and Assumptions
5  Multimedia Session Continuity Scenarios
6  ArchitectureWord-p. 16
6.1  General Principles and Description
6.2  MMSC Architecture Reference Model
6.3  Session Anchoring
6.4  Session TransferWord-p. 19
6.5  Information flowsWord-p. 21Up
6.5.1  MMSC Origination and Termination
6.5.2  Information flow for providing PS-PS session continuityWord-p. 25
6.5.3  Information flows for PS-PS session continuity in conjunction with PS-CS session continuity
6.5.4  Information flow for PS-CS session continuityWord-p. 35
6.5.5  Information flow for providing UE TransferWord-p. 36
6.6  Network-initiated Multimedia Session TransferWord-p. 51
7  Impacts and Enhancements to the IM CN subsystemWord-p. 53
8  Coexistence and/or potential interactions with underlying mobility solutionsWord-p. 54
9  ConclusionWord-p. 59
A  Change historyWord-p. 62Up

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