1、 ETSI TS 123 237 V15.1.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) Service Continuity; Stage 2 (3GPP TS 23.237 version 15.1.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 123 237 V1
2、5.1.0 (2018-07)13GPP TS 23.237 version 15.1.0 Release 15Reference RTS/TSGS-0223237vf10 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistr
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9、ciation. ETSI ETSI TS 123 237 V15.1.0 (2018-07)23GPP TS 23.237 version 15.1.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publ
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13、e or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation P
14、artnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETS
15、I identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules
16、 (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 123 237 V15.1.0 (2018-07)33GPP TS 23.237 version 15.1.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminol
17、ogy 2g3Foreword . 9g3Introduction 9g31 Scope 10g32 References 10g33 Definitions, symbols and abbreviations . 12g33.1 Definitions 12g33.2 Abbreviations . 14g34 High level principles and architectural requirements . 14g34.1 Basic Assumptions . 14g34.1.0 General 14g34.1.1 PS-CS Access Transfer . 14g34.
18、1.2 PS-PS Access Transfer . 15g34.1.3 Inter-UE Transfer 15g34.2 Architectural Requirements 16g34.2.1 General Requirements. 16g34.2.2 Access Transfer Requirements . 16g34.2.3 IUT Requirements 17g34.3 Service Continuity 18g34.3.1 Session Transfer concepts . 18g34.3.1.1 General 18g34.3.1.2 Access Trans
19、fer concepts 19g34.3.1.2.1 General Access Transfer concepts . 19g34.3.1.2.2 Access Transfer (PS CS) concepts . 19g34.3.1.2.2A MSC Server assisted mid-call feature 20g34.3.1.2.3 Co-existence of ICS UE and MSC Server assisted mid-call feature . 20g34.3.1.3 Inter-UE Transfer concepts . 20g34.3.1.3.1 Ge
20、neral 20g34.3.1.3.2 Controller UE and Controllee UE operations 21g34.3.1.3.2.1 Overview . 21g34.3.2 Void 21g34.3.3 Information used for IMS Service Continuity 21g35 Architecture model and reference points 22g35.1 Overview 22g35.2 Reference Architecture for non emergency session . 22g35.2.1 General 2
21、2g35.2.2 Architecture when using ATCF enhancements. 22g35.3 Functional Entities 23g35.3.1 SCC AS . 23g35.3.2 IMS Service Continuity UE 25g35.3.2.1 Access Transfer Functions 25g35.3.2.2 IUT Functions and Roles 25g35.3.2.2.1 Functions . 25g35.3.2.2.2 Controller UE Role 25g35.3.2.2.3 Controllee UE Role
22、 . 26g35.3.3 Emergency Access Transfer Function (EATF) . 26g35.3.4 Access Transfer Control Function (ATCF) 26g35.3.4.1 General 26g35.3.4.2 ATCF inclusion . 27g35.3.5 Access Transfer Gateway (ATGW) 28g35.3.6 HSS . 28g3ETSI ETSI TS 123 237 V15.1.0 (2018-07)43GPP TS 23.237 version 15.1.0 Release 155.3.
23、7 MSC Server 28g35.4 Signalling and bearer paths for IMS Service Continuity 28g35.4.1 General 28g35.4.2 Sessions with PS media flow(s) 28g35.4.2a Sessions with PS media flow(s) using ATCF . 29g35.4.3 Sessions with CS media 29g35.4.3a Sessions with CS media flow(s) using ATCF . 29g35.5 IUT Collaborat
24、ive Sessions 30g35.6 Reference Architecture for SRVCC emergency session 31g36 Procedures and flows for Access Transfer . 31g36.0 Introduction 31g36.1 Registration 31g36.1.1 General 31g36.1.2 Registration using ATCF enhancements. 31g36.1.3 Registration: CS to PS - Single Radio 33g36.1.3.1 IMS Registr
25、ation by UE 33g36.1.3.2 UE IMS Registration change update . 33g36.2 Origination and Termination 34g36.2.1 Origination 34g36.2.1.1 Origination Procedures 34g36.2.1.2 Originating sessions that use CS media 34g36.2.1.3 Originating sessions that use only PS media flow(s) 35g36.2.1.3a Originating session
26、s that use only PS media flow(s) - fallback to CS domain in pre-alerting phase 36g36.2.1.4 Originating sessions for (v)SRVCC that use ATCF enhancements 37g36.2.1.5 Originating sessions for CS to PS - Single Radio . 37g36.2.2 Termination. 38g36.2.2.1 Termination Procedures 38g36.2.2.2 Terminating ses
27、sions that use CS media . 38g36.2.2.3 Terminating sessions that use only PS media flow(s) . 39g36.2.2.3a Terminating sessions that use only PS media flow(s) - fallback to CS domain in pre-alerting phase . 40g36.2.2.4 Terminating sessions over Gm where speech media is not accepted by the UE . 41g36.2
28、.2.5 Terminating sessions for (v)SRVCC that use ATCF enhancements . 42g36.2.2.6 Terminating sessions for CS to PS - Single Radio 42g36.3 Access Transfer 43g36.3.1 Access Transfer Procedure . 43g36.3.1.1 Introduction . 43g36.3.1.2 Access Transfer Procedures 43g36.3.1.2a Access Transfer Procedures usi
29、ng ATCF enhancements 44g36.3.1.3 Enablement of Access Transfer procedures 44g36.3.1.3a Enablement of Access Transfer procedures using ATCF enhancements 45g36.3.1.4 Execution of Access Transfer procedures . 45g36.3.1.4a Execution of Access Transfer procedures using ATCF enhancements . 45g36.3.1.5 Rem
30、ote Leg Update. 45g36.3.1.6 Source Access Leg Release . 46g36.3.1.7 Access Transfer Information for ATCF 46g36.3.2 Access Transfer Information flows . 47g36.3.2.0 General 47g36.3.2.1 PS CS Access Transfer . 47g36.3.2.1.1 PS CS Access Transfer: PS to CS - Dual Radio . 47g36.3.2.1.1a PS CS Access Tran
31、sfer: PS to CS Dual Radio with Session State Information 48g36.3.2.1.2 PS CS Access Transfer: CS to PS - Dual Radio . 49g36.3.2.1.2a PS CS Access Transfer: CS to PS Dual Radio with Session State Information 50g36.3.2.1.2b CS - PS Access Transfer: CS to PS - Dual Radio, incoming voice call in alertin
32、g phase . 51g36.3.2.1.2c CS - PS Access Transfer: CS to PS - Dual Radio, outgoing voice call in pre-alerting state or in alerting phase . 51g36.3.2.1.2d PS - CS Access Transfer: PS to CS - Dual Radio, outgoing voice or video call in pre-alerting state or in alerting phase 51g36.3.2.1.2e PS - CS Acce
33、ss Transfer: PS to CS - Dual Radio, incoming voice call in alerting phase . 53g36.3.2.1.3 Subsequent Access Transfers 54g36.3.2.1.4 PS CS Access Transfer: PS to CS Single Radio 54g3ETSI ETSI TS 123 237 V15.1.0 (2018-07)53GPP TS 23.237 version 15.1.0 Release 156.3.2.1.4a PS CS Access Transfer: PS to
34、CS Single Radio with Session State Information 56g36.3.2.1.4b PS to CS Access Transfer: PS to CS Single Radio; using I1 reference point . 58g36.3.2.1.4c PS - CS Access Transfer: PS to CS - Single Radio, incoming voice or video call in pre-alerting or alerting phase . 59g36.3.2.1.4d PS - CS Access Tr
35、ansfer: PS to CS - Single Radio, outgoing voice or video call in pre-alerting state or in alerting phase . 61g36.3.2.1.4e PS - CS Access Transfer: PS to CS - Single Radio, voice and video 63g36.3.2.1.5 PS CS Access Transfer for voice and video, Dual Radio . 65g36.3.2.1.6 PS CS Access Transfer: PS to
36、 CS Dual Radio, mid-call service with an active speech and video session 66g36.3.2.1.7 PS CS Access Transfer: PS to CS Dual Radio, mid-call service with one inactive speech and video session . 66g36.3.2.1.7a PS - CS Access Transfer: PS to CS - Single Radio, mid-call service with an incoming waiting
37、call in alerting phase 67g36.3.2.1.7b PS - CS Access Transfer: PS to CS - Single Radio, mid-call service with an outgoing call in pre-alerting state or in alerting phase. 69g36.3.2.1.7c PS - CS Access Transfer: PS to CS - Single Radio, mid-call service with an incoming call in alerting phase and a h
38、eld session . 71g36.3.2.1.8 PS - CS Access Transfer: Conferencing - for UEs not using ICS capabilities 73g36.3.2.1.9 PS CS Access Transfer: PS to CS Single Radio using ATCF enhancements 74g36.3.2.1.10 PS - CS Access Transfer: CS to PS - Single Radio . 77g36.3.2.2 PS - PS Access Transfer 80g36.3.2.2.
39、1 PS-PS Access Transfer with full media transfer 80g36.3.2.2.2 PS-PS Access Transfer with partial media transfer . 81g36.3.2.2.3 PS-PS Access Transfer with full media transfer for an incoming call in early dialog phase . 81g36.3.2.2.4 PS-PS Access Transfer with full media transfer for an outgoing ca
40、ll in early dialog phase 83g36.3.2.3 PS - PS in conjunction with PS - CS Access Transfer 84g36.3.2.3.1 PS - PS in conjunction with PS - CS Access Transfer: PS to CS for UEs not using ICS capabilities . 84g36.3.2.3.2 PS - PS in conjunction with PS - CS Access Transfer: CS to PS for UEs not using ICS
41、capabilities . 86g36.3.2.3.3 PS PS in conjunction with PS - CS Access Transfer: PS to CS for UEs with ICS capabilities - Using Gm reference point . 86g36.3.2.3.4 PS - PS in conjunction with PS - CS Access Transfer: CS to PS for UEs with ICS capabilities - Using Gm reference point . 88g36.3.2.3.5 PS
42、PS in conjunction with PS CS Access Transfer: Active/Held sessions - Using Gm reference point . 88g36.3.2.3.6 PS PS in conjunction with PS CS Access Transfer: Explicit Communication Transfer - Using Gm reference point 89g36.3.2.3.7 PS PS in conjunction with PS CS Access Transfer: Conferencing - Usin
43、g Gm reference point . 89g36.3.2.3.8 PS PS in conjunction with PS CS Access Transfer: PS to CS using I1 reference point . 89g36.3.2.3.9 PS - PS in conjunction with PS - CS Access Transfer: CS to PS - using I1 reference point . 91g36.3.2.3.10 PS - PS in conjunction with PS - CS Access Transfer: PS to
44、 CS for Active/Held sessions - using I1 reference point . 91g36.3.2.3.11 PS - PS in conjunction with PS - CS Access Transfer: CS to PS for Active/Held sessions - using I1 reference point . 92g36.3.3 Media Adding/Deleting 92g36.3.3.1 Local End Initiation case: Adding new PS media to existing CS sessi
45、on . 92g36.3.3.2 Local End Initiation case: Incorporating existing CS media in new IMS Session and Gm Service Control 93g36.3.3.3 Local End Initiation case: Adding PS media to IMS session with CS media . 94g36.3.3.4 Remote End Initiation case: Adding new PS media to existing CS session 95g36.3.3.5 R
46、emote End Initiation case: Incorporating existing CS media in new IMS Session and Gm Service Control . 96g36.3.3.6 Remote End Initiation case: Adding PS media to IMS session with CS media 97g36.3.3.7 Local End Initiation case Removing media from split CS and PS sessions . 98g36.3.3.8 Remote End Init
47、iation case Removing media from split CS and PS sessions 99g36.3.3.9 Local End Initiation case: Adding new PS media to existing PS session 100g36.3.3.10 Remote End Initiation case: Adding new PS media to existing PS session 100g36.3.3.11 Local End Initiation case: Removing media from split PS sessio
48、ns . 100g36.3.3.12 Remote End Initiation case: Removing media from split PS sessions 100g3ETSI ETSI TS 123 237 V15.1.0 (2018-07)63GPP TS 23.237 version 15.1.0 Release 156.3.4 Void 100g36.3.5 Service continuity for ICS UE using MSC Server assisted mid-call feature while maintaining CS media 100g36.4
49、Operator Policy and User Preferences 100g36.5 Execution of supplementary services . 101g36.5.1 General 101g36.5.2 Originating Identification Presentation (OIP) . 101g36.5.3 Originating Identification Restriction (OIR) . 101g36.5.4 Terminating Identification Presentation (TIP) 102g36.5.5 Terminating Identification Restriction (TIR) 102g36.5.6 Communication Diversion (CDIV) . 102g36.5.7 Communication Hold (HOLD) . 102g36.5.8 Communication Barring (CB). 102g36.5.9 Message Waiting Indication (MWI) . 102g36.5.10 Confer
