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7.1 Ims Centralized Service Control (icsra) uid_370025 (open ietf)

Resources: S1,S2,C1,C3,C4,IETF

References

Document

Title/Contents

WID(s)

SP-070924

S1 WID on IMS Centralized Service Control - Requirement and Architecture (ICSRA)

CP-080492

CT WID on IMS Centralized Service Control – Protocol, Addressing, Subscriber Data (ICSPASD)

Impacted Specifications

TS 22.101

Service aspects; service principles

TS 23.206

Voice Call Continuity (VCC) between Circuit Switched (CS) and IP Multimedia Subsystem (IMS); Stage 2 - S2

TS 24.229

Internet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 - C1

TS 23.003

Numbering, addressing and identification - C4

Add ICS specific IMPI and temporary IMPU

TS 29.232

Media Gateway Controller (MGC) - Media Gateway (MGW) interface; Stage 3 - C4

Extension to Mc interface protocol for supporting Mb user plane

TS 23.018

Basic call handling; Technical realization - C4

Updates to the call set-up and termination procedures, and interactions with supplementary services

TS 29.002

Mobile Application Part (MAP) specification - C4

Update subscriber profile and MAP messaging to indicate attempt of IMS login by MSC Server enhanced for ICS

New Dedicated Specifications/Reports

TS 23.292

IP Multimedia System (IMS) centralized services; Stage 2 - S2

TS 24.292

IP Multimedia Core Network subsystem Centralized Services; Stage 3 - C1

TS 24.293

ICS Protocol over USSD bearer (C1)

TS 29.292

Mobile Radio Interface NAS signalling - SIP translation/conversion - C3

Supporting Individual Members: Alcatel-Lucent, Nortel Networks, AT&T, Telecom Italia, Samsung, LG Electronics, Nokia Siemens Networks, Nokia, Huawei, Ericsson, Motorola, NEC, Orange, ZTE, Fujitsu, Verizon, Telcordia, RIM.

UID

Name

Resource

Hyperlink

WI_rapporteur

Notes

TS_TR

380039

Stage 1

S1

SP-070924

AT&T

SP#39 completed

22.101

380040

Stage 2

S2

SP-070924

Alcatel-Lucent

SP#40 completed

23.292, 23.206

400205

Stage 3

C1,C3,C4,IETF

CP-091046

Ericsson

CP#46 completed

-

400005

CT1 aspects

C1

CP-091046

Ericsson

CP#46 completed

24.229, new (24.292, 24.286)

521014

(IETF) CT1

C1-IETF

CP-091046

Roland Jesske

Submitted to IESG for publication

draft-ietf-salud-alert-info-urns

521015

(IETF) CT1

C1-IETF

CP-091046

Andrew Allen

CP#59 completed

RFC 6871 (was draft-ietf-mmusic-sdp-media-capabilities)

521016

(IETF) CT1

C1-IETF

CP-091046

Andrew Allen

CP#64 complete

RFC 7195 (was draft-ietf-mmusic-sdp-cs)

521017

(IETF) CT1

C1-IETF

CP-091046

Andrew Allen

CP#62 completed

RFC7006 (was draft-ietf-mmusic-sdp-miscellaneous-caps)

400006

CT3 aspects

C3

CP-091046

Mavenir

CP#43 completed

new 29.292

400007

CT4 aspects

C4

CP-091046

Ericsson

CP#42 completed

23.003, 29.232, 23.018, 29.002

521018

(IETF) CT4 aspects

C4-IETF

CP-091046

Andrew Allen

CP#64 complete

RFC 7254 (was draft-montemurro-gsma-imei-urn)

400105

Deleted – I1 interface

C1

CP-080492

Huawei

CP#41 work stopped

24.293

Communication networks are evolving towards packet-based infrastructures. A single common consolidated core network offers service providers the possibility of reduced core network complexity and maintenance. As service providers shift their core network infrastructure from the CS domain to a consolidated common IMS infrastructure, the need was identified to enable the consistent provision of services to subscribers over a variety of accesses, including CS domain and PS domain accesses.

A Study on Centralized IMS Services (FS_ICS) UID_380034 has been conducted by SA1 (TR 22.892) and SA2 (TR 23.892) on call/session establishment via CS domain access and IP-CAN and on calls/sessions transferred across CS domain access and IP-CAN, including the interactions with domain selection. Handling of the multiple media enabled by the multimedia telephony communication service has been investigated. Requirements and architecture solutions in the TRs are applicable to terminals with or without VCC capabilities. Impact on legacy terminals with the same subscription (e.g. USIM swapping) have also been studied.

With this background, the result of this work is:

  • SA1 captured the findings from TR 22.892 and developed further into TS 22.101;

  • SA2 developed Stage 2 meeting TS 22.101 requirements for ICS in new TS 23.292 (Stage 2 being based on TR 23.892 conclusions).

The provision of a consistent user experience is described in the cases:

  • where users access services via CS or PS access; and

  • where domain transfer between CS and PS access is required.

CT WGs specified the necessary Stage 3 as follows:

  • CT1:

    • enhancements to IMS call control protocol (based on SIP and SDP) and to UE functionality;

    • ICS Protocol over USSD (Unstructured Supplementary Service Data) bearer;

  • CT3: protocol translation/conversion for the MSC Server;

  • CT4:

    • ICS specific naming/addressing and any required Core Network protocol enhancements and/or additions;

    • Enhancements to Mc interface to support the Mb user plane interface;

    • Investigate any impacts to the subscriber data in the CS domain and IMS;

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