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TS 22.228 (SA1)
Service requirements for IMS

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(P) V14.1.0    2016/12    52 p.
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Rapporteur:  Dr. Swetina, Joerg
See also:  IMS-related TS/TR    


This TS defines the service requirements from users' and operators' perspective for the support of IP multimedia applications through the IMS.

IP multimedia applications are supported by IP multimedia sessions in the IM CN Subsystem. IP multimedia sessions use IP connectivity bearers (e.g. GPRS as a bearer). Examples of IP multimedia applications include speech communication, real time multimedia applications, shared online whiteboards etc.

This TS, in general, does not standardise usage of IP multimedia applications, but instead identifies the requirements to enable their support.

In order to align IP multimedia applications wherever possible with non-3GPP IP applications, the general approach is to adopt non-3GPP IP based solutions.

The existing legacy tele- and supplementary services shall not be re-standardised as IP multimedia applications, and multimedia equivalent applications may be created with toolkits.


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1   Scope [R5]   PDF-p. 7
2   References [R5]
3   Definitions and abbreviations [R5]
4   Introduction [R5]
5   High level requirements [R5]   PDF-p. 11
6   Standardised service capability approach [R5]   PDF-p. 13
7   User service requirements [R5]      Up
7.1   Identifying IP multimedia application subscriptions
7.2   Access to the IM CN subsystem   PDF-p. 14
7.3   Capability negotiation
7.4   Redirecting of IP Multimedia sessions
7.5   Invoking an IP multimedia session   PDF-p. 15
7.6   Handling of an incoming session (by the terminating entity)
7.7   Handling of an ongoing session
7.8   Ending a session   PDF-p. 19
7.9   Void
7.10   Handling of conferences [R6]
7.11   Handling of multicast services [R7]
7.12   Support for Local Numbers in the IMS [R7]
7.13   User determined user busy [R8]   PDF-p. 21
7.14   IMS Inter-UE Transfer [R9]
7.15   Prevention of Unsolicited Communication in IMS (PUCI) [R9]   PDF-p. 22
7.16   Support for Push Notification Service in IMS [R12]

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