1、 ETSI TS 12Universal Mobile TelIP Multimedia (IM) Core NSubsystem(3GPP TS 24.23floppy3TECHNICAL SPECIFICATION124 237 V12.11.0 (201elecommunications System (LTE; e Network (CN) subsystem IP em (IMS) service continuity; Stage 3 .237 version 12.11.0 Release 1016-01) (UMTS); IP Multimedia 12) ETSI ETSI
2、TS 124 237 V12.11.0 (2016-01)13GPP TS 24.237 version 12.11.0 Release 12Reference RTS/TSGC-0124237vcb0 Keywords 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 lucrati
3、f enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the pres
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9、TSI ETSI TS 124 237 V12.11.0 (2016-01)23GPP TS 24.237 version 12.11.0 Release 12Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI memb
10、ers and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi
11、.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the
12、 present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership 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 bein
13、g references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI 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“, “w
14、ill not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (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 124 237 V12.11.0 (2016-01)33GPP TS 24
15、.237 version 12.11.0 Release 12Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 14g31 Scope 15g32 References 15g33 Definitions and abbreviations . 19g33.1 Definitions 19g33.2 Abbreviations . 21g34 Overview of IP Multimedia (IM) Core Network (CN) subsystem
16、Service Continuity 22g34.1 General . 22g34.2 Underlying network capabilities . 24g34.2.1 General 24g34.2.2 PS-CS session continuity, Single Radio . 24g34.2.3 PS to CS and CS to PS session continuity, dual radio 24g34.3 URI and address assignments . 24g34.4 Support of session continuity in enterprise
17、 scenarios . 25g34.5 Guidelines for use of media feature tags or feature capability indicators . 25g35 Functional entities 26g35.1 Introduction 26g35.2 User Equipment (UE) . 26g35.3 Application Server (AS) . 26g35.4 MSC server . 26g35.5 EATF 28g35.6 Access Transfer Control Function (ATCF) 28g35.7 Ac
18、cess Transfer Gateway (ATGW) . 28g36 Roles for registration in the IM CN subsystem for service continuity . 29g36.1 Introduction 29g36.2 SC UE . 29g36.2.1 Distinction of requests 29g36.2.2 General 29g36.2.3 SC UE receiving the ATGW information for CS to PS SRVCC 29g36.3 SCC AS 30g36.3.1 General 30g3
19、6.3.2 Triggers for the SCC AS providing information to ATCF . 30g36.3.3 SCC AS providing the PS to CS SRVCC related information to the ATCF 31g36.3.4 Triggers for the SCC AS providing information to MSC server 32g36.3.5 SCC AS providing the CS to PS SRVCC information to the MSC server . 33g36.4 MSC
20、server . 33g36.4.1 Distinction of requests 33g36.4.2 General 33g36.4.3 MSC server receiving the MSC information for CS to PS SRVCC . 33g36.5 Access Transfer Control Function (ATCF) 34g36.5.1 Distinction of requests 34g36.5.2 Registration related procedures in the ATCF . 34g36.5.3 ATCF receiving the
21、SRVCC-related information . 36g36.5.4 ATCF sending the ATGW information for CS to PS SRVCC . 36g36.5.5 ATCF receiving the UE information for CS to PS SRVCC . 37g36A Roles for General Capabilities . 37g36A.1 Introduction 37g36A.2 UE roles 37g3ETSI ETSI TS 124 237 V12.11.0 (2016-01)43GPP TS 24.237 ver
22、sion 12.11.0 Release 126A.2.1 Operator policy enforcement 37g36A.2.2 Signalling elements . 38g36A.2.2.1 Common SIP message set up procedures 38g36A.2.2.2 SIP INVITE request 38g36A.3 ATCF 38g36A.3.1 SRVCC information bound to the registration path 38g36A.4 SCC AS 39g36A.4.1 Common SIP message set up
23、procedures . 39g36A.4.2 SIP INVITE request 39g36A.4.3 SIP INVITE responses towards the SC UE 39g36A.4.3A SIP INVITE responses towards the MSC server 41g36A.4.4 Handling of OMR specific attributes 42g36A.4.5 Target refresh request for a dialog and associated responses 42g36A.4.6 Rejecting malicious S
24、IP REFER requests from remote UE . 43g36A.4.7 Protecting from malicious SIP INFO requests with remote leg information from remote UE . 44g36A.4.8 Precondition and access transfer . 44g36A.5 SDP media description conflict between target and remote access leg 44g36A.6 Indicating traffic leg . 44g36A.6
25、.1 The SCC AS server procedure for indicating traffic leg . 44g36A.6.2 The MSC server procedure for indicating traffic leg 44g36A.6.3 The ATCF server procedure for indicating traffic leg 45g36A.7 MSC server . 45g36A.7.1 Precondition and access transfer . 45g37 Roles for call origination for service
26、continuity . 45g37.1 Introduction 45g37.2 SC UE . 45g37.2.1 General 45g37.2.2 Additional procedures with MSC server assisted mid-call feature . 46g37.3 SCC AS 46g37.3.1 Distinction of requests sent to the SCC AS 46g37.3.2 Call origination procedures at the SCC AS 47g37.3.3 Subscription related proce
27、dures in the SCC AS . 47g37.4 EATF 48g37.4.1 Distinction of requests sent to the EATF 48g37.4.2 Call origination procedures at the EATF 48g37.5 Access Transfer Control Function (ATCF) 48g37.5.1 Distinction of requests 48g37.5.2 Call origination procedures in the ATCF 49g37.5.2.1 General 49g37.5.2.2
28、Sessions originated in PS domain . 49g37.5.2.3 Sessions originated in CS domain . 50g37.5.3 Procedures in the ATCF for originating requests not related to a call 51g37.6 MSC server . 51g37.6.1 Call origination procedures . 51g38 Roles for call termination for service continuity 52g38.1 Introduction
29、52g38.2 SC UE . 52g38.3 SCC AS 53g38.3.1 Distinction of requests sent to the SCC AS 53g38.3.2 Call termination procedures in the SCC AS . 53g38.4 Access Transfer Control Function (ATCF) 55g38.4.1 Distinction of requests 55g38.4.2 Call termination procedures in the ATCF . 55g38.4.2.1 General 55g38.4.
30、2.2 Sessions terminated in PS domain 55g38.4.2.3 Sessions terminated in CS domain 56g38.5 MSC server . 57g38.5.1 Distinction of requests 57g38.5.2 Call termination procedures 58g38.5.2.1 SIP INVITE request from home network 58g3ETSI ETSI TS 124 237 V12.11.0 (2016-01)53GPP TS 24.237 version 12.11.0 R
31、elease 128.5.2.2 SIP INVITE request from ATCF 58g39 Roles for PS-CS access transfer . 59g39.1 Introduction 59g39.1A Additional procedures with MSC Server assisted mid-call feature 59g39.2 SC UE . 59g39.2.0 General 59g39.2.1 SC UE not using ICS procedures for PS to CS access transfer . 59g39.2.1AA SC
32、 UE using ICS procedures for PS to CS access transfer . 61g39.2.1A SC UE procedures for PS to CS access transfer with MSC server assisted mid-call feature 62g39.2.1B SC UE procedures for PS to CS access transfer with MSC server assisted mid-call feature for speech and video session 65g39.2.2 SC UE p
33、rocedures for CS to PS access transfer . 66g39.2.2.1 Distinction of request 66g39.2.2.2 SC UE procedure for transferring the first CS call 66g39.2.3 SC UE procedures for CS to PS access transfer with MSC server assisted mid-call feature 67g39.2.4 SC UE procedures for selecting a session in an early
34、dialog phase to be transferred using PS to CS dual radio access transfer procedure . 68g39.2.5 SC UE procedures for CS to PS dual radio access transfer of calls in an early phase 69g39.2.5.1 Conditions for CS to PS dual radio access transfer of calls in originating pre-alerting or in the alerting ph
35、ase 69g39.2.5.2 SC UE procedure for CS to PS dual radio access transfer of calls in originating pre-alerting or in the alerting phase 70g39.2.5.3 SC UE procedures for transferring an additional CS session in an early phase 71g39.3 SCC AS 72g39.3.0 General 72g39.3.1 Distinction of requests sent to th
36、e SCC AS 72g39.3.2 SCC AS procedures for PS to CS access transfer . 72g39.3.2A SCC AS procedures for PS to CS access transfer with MSC server assisted mid-call feature . 76g39.3.3 SCC AS procedures for CS to PS access transfer . 80g39.3.4 SCC AS procedures for CS to PS access transfer with MSC serve
37、r assisted mid-call feature . 81g39.3.5 SCC AS procedures for PS to CS dual radio access transfer of calls in an early dialog phase . 83g39.3.5.1 Conditions for selecting a sessions in an early dialog phase . 83g39.3.5.2 SCC AS procedures for PS to CS dual radio access transfer of a originating sess
38、ion in the alerting phase 84g39.3.5.3 SCC AS procedures for PS to CS dual radio, access transfer of a originating session in the pre-alerting phase 86g39.3.5.4 SCC AS procedures for PS to CS dual radio access transfer of an additional session in an early dialog phase. 88g39.3.5.5 SCC AS procedures f
39、or PS to CS dual radio access transfer of a terminating session in the alerting phase 89g39.3.6 Removal of non-transferred audio media components and release of source access legs. 90g39.3.7 SCC AS procedures for CS to PS dual radio access transfer for calls in an early phase 91g39.3.7.1 Conditions
40、for transferring dialog(s) in the originating pre-alerting or the alerting dialog phase . 91g39.3.7.2 SCC AS procedures for CS to PS dual radio access transfer for originating calls in pre-alerting phase or in alerting phase on the originating side . 91g39.3.7.3 SCC AS procedures for CS to PS dual r
41、adio access transfer for a call in the alerting phase on the terminating side . 93g39.3.7.4 SCC AS procedures for PS to CS dual radio access transfer of an additional session in an early dialog phase. 94g39.4 MSC server enhanced for ICS 97g39.4.1 Void 97g39.4.1A Void 97g39.5 PS to CS session continu
42、ity with MSC server assisted mid-call feature 97g39.6 PS to CS session continuity with MSC server assisted mid-call feature for speech and video session 100g39.7 MSC procedures for PS to CS dual radio access transfer of calls in an early phase 100g39.8 MSC server enhanced for dual radio access trans
43、fer using a SIP interface 102g39.8.1 General 102g310 Roles for PS-PS access transfer 102g310.1 Introduction 102g310.2 SC UE . 102g3ETSI ETSI TS 124 237 V12.11.0 (2016-01)63GPP TS 24.237 version 12.11.0 Release 1210.2.0 General 102g310.2.1 Full session transfer 103g310.2.1A Void 107g310.2.2 Partial s
44、ession transfer 107g310.2.3 Void 108g310.3 SCC AS 108g310.3.1 Distinction of requests sent to the SCC AS 108g310.3.2 PS to PS access transfer procedures at the SCC AS . 108g310.3.3 Void 113g310.3.4 S-CSCF releasing the source access leg during PS to PS access transfer . 113g310.3.5 P-CSCF releasing
45、the source access leg during PS to PS access transfer . 113g310.3.6 P-CSCF releasing early dialog during PS to PS access transfer . 113g311 Roles for PS-PS access transfer in conjunction with PS-CS access transfer 114g311.1 Introduction 114g311.2 SC UE . 114g311.2.1 SC UE procedures for PS to PS+CS
46、access transfer . 114g311.2.1.1 General 114g311.2.1.2 SC UE procedures for PS to PS+CS access transfer using ICS 114g311.2.1.3 SC UE procedures for PS to PS+CS access transfer not using ICS 115g311.2.1.4 SC UE procedures for PS to PS+CS access transfer not using ICS with MSC server assisted mid-call
47、 feature . 115g311.2.2 SC UE procedures for PS+CS to PS access transfer . 116g311.2.2.1 General 116g311.2.2.2 SC UE procedures for PS+CS to PS access transfer using ICS 116g311.2.2.3 SC UE procedures for PS+CS to PS access transfer not using ICS 116g311.3 SCC AS 117g311.3.1 Distinction of requests s
48、ent to the SCC AS 117g311.3.2 SCC AS procedures for PS to PS+CS access transfer 117g311.3.3 SCC AS procedures for PS+CS to PS access transfer 117g312 Roles for PS-CS access transfer, Single Radio 118g312.1 Introduction 118g312.2 SC UE procedures for PS to CS access transfer, PS to CS SRVCC . 119g312
49、.2.1 General 119g312.2.2 ICS-based 119g312.2.3 Not based on ICS 120g312.2.3A Not based on ICS with MSC Server assisted mid-call feature 120g312.2.3B Call in alerting phase 122g312.2.3B.1 General 122g312.2.3B.1A Considerations for MSC server assisted mid-call feature . 125g312.2.3B.2 Assignment of Transaction Identifiers to the transferred sessions 125g312.2.3B.3 Single call in alerting phase or pre-alerting phase . 126g312.2.3B.3.1 Terminating call in alerting phase . 126g312.2.3B.3.2 Originating call in alerting phase . 126g312.2.3B.3.3 PS to CS SRVCC for originating calls i
