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TS 22.279 (SA1)
Combined CS and IMS sessions – Stage 1

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(P) V14.0.0    2017/03    16 p.
(P) V13.0.0    2016/01    16 p.
(P) V12.0.0    2014/10    16 p.
(P) V11.0.0    2012/09    16 p.
(P) V10.0.0    2011/04    16 p.
(P) V9.0.0    2009/12    16 p.
(P) V8.0.0    2009/01    16 p.
(P) V7.1.0    2005/12    16 p.

Rapporteur:  Ms. Mustapha, Mona
See also:  CSICS-related TS/TR    

This TS specifies service requirements for Combining CS and IMS services using a CS speech or CS multimedia call in association with an IMS session. The IMS session may consist of one or more IMS services. Requirements for the following capabilities are included:
  • Radio capability exchange.
  • Terminal capability exchange.
  • E.164 number exchange.
  • Adding IMS session to an ongoing CS call.
  • Adding a CS call to an ongoing IMS session.
  • Supplementary services as they relate to CSICS.
It is intended that the capabilities defined herein for CSICS shall support interoperability between different operator networks, and roaming.


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1   Scope   PDF-p. 6
2   References
3   Definitions, symbols and abbreviations
4   Introduction to Combinational Service
5   General requirements
6   User experience of combinational services   PDF-p. 8
7   Service Capability Detection
8   IMS service behaviour during a Combinational Service   PDF-p. 9
9   Interaction with supplementary services
9.1   Line Identification
9.2   Name Identification
9.3   Call Forwarding      Up
9.4   Call Offering   PDF-p. 11
9.5   Call Completion
9.6   Multi Party
9.7   Community of Interest
9.8   Charging   PDF-p. 12
9.9   Additional Info Transfer      Up
9.10   Call Barring
9.11   Call Priority   PDF-p. 13      Up
10   Impacts on other services
11   Charging aspects for Combinational Service
12   Provisioning
A   Change history   PDF-p. 14

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