TS 23.237 ★
IMS Service Continuity

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V16.4.0 (PDF) 2020/06 192 p.

V15.2.0 2019/09 185 p.

V14.2.0 2016/12 183 p.

V13.1.0 2015/12 172 p.

V12.10.0 2015/12 172 p.

V11.11.0 2015/12 171 p.

V10.13.0 2015/12 158 p.

V9.10.0 2012/12 86 p.

V8.7.0 2010/03 42 p.

Rapporteur:: Mr. Song, Jae seung LG Electronics Inc.

3GPP 23.237 - IMS Service Centralization and Continuity Reference Architecture when using ATCF

essential Table of Contents for TS 23.237 Word version: 16.4.0

each title, in the ┃ or ┃ area, links to the equivalent title in the CONTENT

2 References Word‑p. 11

3 Definitions, symbols and abbreviations Word‑p. 13

4 High level principles and architectural requirements Word‑p. 15

4.1 Basic Assumptions Word‑p. 15

4.2 Architectural Requirements Word‑p. 17

4.3 Service Continuity Word‑p. 20

5 Architecture model and reference points Word‑p. 23

5.1 Overview Word‑p. 23

5.2 Reference Architecture for non emergency session Word‑p. 24

5.3 Functional Entities Word‑p. 25

5.4 Signalling and bearer paths for IMS Service Continuity Word‑p. 30

5.5 IUT Collaborative Sessions |R9| Word‑p. 31

5.6 Reference Architecture for SRVCC emergency session |R9| Word‑p. 32

6 Procedures and flows for Access Transfer Word‑p. 33

6.0 Introduction Word‑p. 33

6.1 Registration Word‑p. 33

6.2 Origination and Termination Word‑p. 36

6.3 Access Transfer Word‑p. 45

6.4 Operator Policy and User Preferences Word‑p. 102

6.5 Execution of supplementary services Word‑p. 103

6a Procedures and flows for Inter UE Transfer |R9| Word‑p. 106

6a.0 Introduction Word‑p. 106

6a.1 IUT general procedures Word‑p. 106

6a.2 Information flows for Collaborative Session establishment Word‑p. 106

6a.3 Media Transfer within Collaborative Session Word‑p. 111

6a.4 Media adding/deleting/modifying within Collaborative Session Word‑p. 119

6a.4a Transfer of Collaborative Session Control |R10| Word‑p. 134

6a.5 Collaborative Session release Word‑p. 141

6a.6 Inter UE Transfer without establishing a Collaborative Session Word‑p. 142

6a.7 Execution of supplementary services Word‑p. 145

6a.8 IUT target discovery Word‑p. 148

6a.9 Inter-UE Transfer Initiated by Target UE |R10| Word‑p. 151

6a.10 Media Flow Replication by network |R10| Word‑p. 158

6a.11 Session Replication by remote party |R10| Word‑p. 164

6a.12 User authorisation and preferences |R10| Word‑p. 168

6b Void

6c Procedures and flows for SRVCC Emergency Session |R9| Word‑p. 169

6d Procedures and flows for DRVCC Emergency Session for WLAN |R14| Word‑p. 176

7 Security Word‑p. 178

8 Charging Word‑p. 178

A Controller UE and Controllee UE operations |R9| Word‑p. 180

B (Normative) Additional enhancements for SRVCC |R14| Word‑p. 182

C (Normative) ATCF in Architectures without IMS-level roaming interfaces |R16| Word‑p. 185

$ Change history Word‑p. 188

TS 23.237 ★ IMS Service Continuity

essential Table of Contents for TS 23.237 Word version: 16.4.0

TS 23.237 ★
IMS Service Continuity