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TS 22.228SA1
Service Requirements for IMS

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Rapporteur:  Dr. Swetina, JoergNEC Europe Ltd

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.

full Table of Contents for  TS 22.228  Word version:   17.0.0

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1  ScopeWord-p. 7
2  References
3  Definitions and abbreviations
4  IntroductionWord-p. 11
5  High level requirements
6  Standardised service capability approachWord-p. 13
7  User service requirementsUp
7.1  Identifying IP multimedia application subscriptionsWord-p. 14
7.2  Access to the IM CN subsystem
7.3  Capability negotiation
7.4  Redirecting of IP Multimedia sessionsWord-p. 15
7.5  Invoking an IP multimedia session
7.6  Handling of an incoming session (by the terminating entity)Word-p. 18
7.7  Handling of an ongoing session
7.8  Ending a session
7.10  Handling of conferences [R6]
7.11  Handling of multicast services [R7]
7.12  Support for Local Numbers in the IMS [R7]Word-p. 21
7.13  User determined user busy [R8]
7.14  IMS Inter-UE Transfer [R9]
7.15  Prevention of Unsolicited Communication in IMS (PUCI) [R9]Word-p. 23
7.16  Support for Push Notification Service in IMS [R12]
8  Interworking requirements [R6]
9  IP Addressing [R8]
10  Interconnection requirements [R8]
11  Support of WebRTC IMS Client access to IMS [R12]Word-p. 29
A  Example IP multimedia application scenariosWord-p. 31
B  Business models use cases [R8]Word-p. 35
C  Basic communication cases for IMS networks [R8]Word-p. 37
D (Normative)  Access to IMS via non-3GPP access [R8]Word-p. 39
E  Example use cases for IMS Inter UE Transfer (i.e. transfer/replication/sharing) [R10]Word-p. 40
G  Example use cases for IMS-Based Telepresence [R12]Word-p. 41
H  Support of WebRTC client access to IMS [R12]Word-p. 42
I  Change historyWord-p. 48

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