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TR 23.838 (SA2)
IMS Service Continuity enhancements –
Service, policy and interaction

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(W-zip) V9.0.0    2009/06    51 p.


Rapporteur:  Mr. Zhang, Heng liang
See also:  ISC-related TS/TR    


This TR intends to develop enhancements for Rel-8 IMS Service Continuity and solutions for mobility of media flows and control of a session between different devices under the same subscription (i.e. Inter-UE Transfer) to a state where they can be transferred to normative specifications, focusing on the following aspects:

For Inter-UE transfer:
  • Inter-UE Transfer scenarios for transferring/retrieval/addition/deletion of media flows in a Collaborative Session;
  • Inter-UE Transfer scenarios for establishment or continuation of a Collaborative Session while transferring control;
  • Transferring media flows to the target UE whilst keeping the Collaborative Session control in the source UE.
For IMS Service Continuity Enhancement:
  • Management of operator policy and user preferences;
  • Interaction and coexistence with underlying mobility mechanisms and corresponding policies;
  • Further capabilities for the support of mid-call services during session transfer, in addition to those defined in TS 23.292, TS 23.237 and TS 23.216;
  • Session Continuity for speech and video over CS.
IMS Service Continuity will be restricted to service continuity using IMS procedures, i.e. mobility mechanisms on the IP-CAN level are not within the scope of this document This document does not overlap with the underlying EPC and SRVCC features, even though there could be cross-references between the corresponding Technical Specifications.


 

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1   Scope   Word-p. 6
2   References
3   Definitions and abbreviations   Word-p. 7
4   Inter-UE Transfer
4.1   Architectural Requirements and Assumptions
4.2   Scenarios
4.3   Controller UE and Controllee UE operations for an existing Collaborative Session      Up
4.4   General Principles and Description
4.5   Architecture Reference Model   Word-p. 16
4.6   UE Awareness   Word-p. 23
4.7   Information of Collaborative Session   Word-p. 26
4.8   Execution of supplementary services   Word-p. 27
5   Other IMS Service Continuity enhancements
5.1   General
5.2   Operator policy and user preferences      Up
5.3   Interaction and coexistence with underlying mobility mechanisms and corresponding policies
5.4   Support of mid-call services during session transfer   Word-p. 30
5.4.1   Architectural Requirements
5.4.2   Alternative 1: MSC Server enhancement to support mid-call services during session transfer
5.4.3   Alternative 2: Use of 24.008 CC TI to support mid-call services during session transfer
5.4.4   Alternative 3: Use of STI to support mid-call services during session transfer   Word-p. 43      Up
5.4.5   Evaluation of the alternatives   Word-p. 45
5.5   Session Continuity for speech and video over CS   Word-p. 46
5.6   Architecture
6   Conclusion
A   List of IUT procedures   Word-p. 48
B   Change history   Word-p. 51

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