Content for TR 23.883 Word version: 9.0.0

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1 Scope p. 5

The following aspects of IMS Centralized Services (ICS), though studied in Release 8 (and to some extent documented in TR 23.892), required further study and are herein documented:

ICS supplementary service data management (e.g. Supplementary Services data synchronization).
Management of Telephony Application Server (TAS) user configuration for an ICS UE when PS access cannot be used.

Consideration shall be given to attaining a consistent user experience, and managing and enforcing operator policies as well as user preferences. Heterogeneous access technologies over which the IMS service is provided shall also be taken into account.

2 References p. 5

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TR 23.892: "IP Multimedia Subsystem (IMS) centralized services".

[3]

TS 24.173: "IMS Multimedia telephony service and supplementary services; Stage 3".

[4]

TS 33.222: "Generic Authentication Architecture (GAA)".

[5]

TS 23.292: "IP Multimedia System (IMS) centralized services; Stage 2".

[6]

TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".

[7]

TS 23.002: "Network architecture".

[8]

TS 24.216: "Communication Continuity Management Object (MO)".

[9]

TS 24.010: " Mobile radio interface layer 3 Supplementary services specification; General aspects".

3 Definitions and abbreviations p. 5

3.1 Definitions p. 5

For the purposes of the present document, the terms and definitions given in TR 21.905 apply.

3.2 Abbreviations p. 6

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

TAS

Telephony Application Server

4 Architectural Requirements and Assumptions p. 6

4.1 Basic Assumptions p. 6

4.2 Architectural Requirements p. 6

Home IMS network services shall be provided when using CS access for speech media transport in home and roaming networks; however a reduced service offering may be provided subject to the constraints of the access network.
Home IMS network services shall not be impacted when using an IP-CAN for speech and video media transport in home and roaming networks.
The solution shall support call independent IMS supplementary services management for users who are accessing the network either via the CS domain or via an IP-CAN.
Subscribers shall have consistent service behaviour upon, subject to the constraints of the device and access network.