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TR 24.879 (CT1)
Combining Circuit-Switched (CS) calls and IP Multimedia Subsystem (IMS) sessions

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V7.0.0 (Wzip)    2006/03    73 p.

Rapporteur:  Mr. Dawes, Peter
See also:  CSICS-related TS/TR    

This TR provides the technical realisation for the combination of Circuit Switched calls and IM sessions when using them simultaneously between the same two users.

This TR describes the use of CS and IM services in combination, using the existing procedures that have been defined for CS and IMS. It includes the necessary function as adding an IM session to an ongoing CS call, adding a CS call to an ongoing IM session, supplementary services as they relate to CSICS and supporting capability exchange.

This TR is applicable to UE and Application Servers providing for the combination of Circuit Switched calls and IM sessions.


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1   Scope   Word-p. 7
2   References
3   Definitions, symbols and abbreviations   Word-p. 8
4   Common capability information and identifiers for CS-first and IMS-first scenarios
5   Common procedures for CS-first and IMS-first scenarios      Up
6   Combining a CS call with an existing IM session
7   Combining an IM session with an existing CS call   Word-p. 14
8   Interaction with supplementary services   Word-p. 17

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