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

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V15.0.0 (PDF)  2018/06  16 p.
V14.0.0  2017/03  16 p.
V13.0.0  2016/01  16 p.
V12.0.0  2014/10  16 p.
V11.0.0  2012/09  16 p.
V10.0.0  2011/04  16 p.
V9.0.0  2009/12  16 p.
V8.0.0  2009/01  16 p.
V7.1.0  2005/12  16 p.

Rapporteur:  Ms. Mustapha, Mona
See also:

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.