1、 ETSI TS 1Universal Mobile TelIP Multimedsubsystem IP Multimedi(3GPP TS 24.2floppy3TECHNICAL SPECIFICATION124 237 V13.6.0 (2017elecommunications System (LTE; edia (IM) Core Network (CN) dia Subsystem (IMS) service Stage 3 .237 version 13.6.0 Release 1317-01) (UMTS); e continuity; 13) ETSI ETSI TS 12
2、4 237 V13.6.0 (2017-01)13GPP TS 24.237 version 13.6.0 Release 13Reference RTS/TSGC-0124237vd60 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 lucratif enreg
3、istre 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 present doc
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9、. ETSI ETSI TS 124 237 V13.6.0 (2017-01)23GPP TS 24.237 version 13.6.0 Release 13Intellectual 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 mem
10、bers 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.ets
11、i.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 th
12、e 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 bei
13、ng 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“, “
14、will 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 V13.6.0 (2017-01)33GPP TS 24
15、.237 version 13.6.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 15g31 Scope 16g32 References 16g33 Definitions and abbreviations . 20g33.1 Definitions 20g33.2 Abbreviations . 22g34 Overview of IP Multimedia (IM) Core Network (CN) subsystem S
16、ervice Continuity 23g34.1 General . 23g34.2 Underlying network capabilities . 24g34.2.1 General 24g34.2.2 PS-CS session continuity, Single Radio . 25g34.2.3 PS to CS and CS to PS session continuity, dual radio 25g34.3 URI and address assignments . 25g34.4 Support of session continuity in enterprise
17、scenarios . 26g34.5 Guidelines for use of media feature tags or feature capability indicators . 26g35 Functional entities 26g35.1 Introduction 26g35.2 User Equipment (UE) . 27g35.3 Application Server (AS) . 27g35.4 MSC server . 27g35.5 EATF 28g35.6 Access Transfer Control Function (ATCF) 29g35.7 Acc
18、ess Transfer Gateway (ATGW) . 29g36 Roles for registration in the IM CN subsystem for service continuity . 29g36.1 Introduction 29g36.2 SC UE . 30g36.2.1 Distinction of requests 30g36.2.2 General 30g36.2.3 SC UE receiving the ATGW information for CS to PS SRVCC 30g36.3 SCC AS 31g36.3.1 General 31g36
19、.3.2 Triggers for the SCC AS providing information to ATCF . 31g36.3.3 SCC AS providing the PS to CS SRVCC related information to the ATCF 32g36.3.4 Triggers for the SCC AS providing information to MSC server 33g36.3.5 SCC AS providing the CS to PS SRVCC information to the MSC server . 33g36.4 MSC s
20、erver . 34g36.4.1 Distinction of requests 34g36.4.2 General 34g36.4.3 MSC server receiving the MSC information for CS to PS SRVCC . 34g36.5 Access Transfer Control Function (ATCF) 35g36.5.1 Distinction of requests 35g36.5.2 Registration related procedures in the ATCF . 35g36.5.3 ATCF receiving the S
21、RVCC-related information . 37g36.5.4 ATCF sending the ATGW information for CS to PS SRVCC . 37g36.5.5 ATCF receiving the UE information for CS to PS SRVCC . 38g36A Roles for General Capabilities . 38g36A.1 Introduction 38g36A.2 UE roles 38g3ETSI ETSI TS 124 237 V13.6.0 (2017-01)43GPP TS 24.237 versi
22、on 13.6.0 Release 136A.2.1 Operator policy enforcement 38g36A.2.2 Signalling elements . 39g36A.2.2.1 Common SIP message set up procedures 39g36A.2.2.2 SIP INVITE request 39g36A.3 ATCF 39g36A.3.1 SRVCC information bound to the registration path 39g36A.4 SCC AS 40g36A.4.1 Common SIP message set up pro
23、cedures . 40g36A.4.2 SIP INVITE request 40g36A.4.3 SIP INVITE responses towards the SC UE 40g36A.4.3A SIP INVITE responses towards the MSC server 42g36A.4.4 Handling of OMR specific attributes 43g36A.4.5 Target refresh request for a dialog and associated responses 43g36A.4.6 Rejecting malicious SIP
24、REFER requests from remote UE . 44g36A.4.7 Protecting from malicious SIP INFO requests with remote leg information from remote UE . 45g36A.4.8 Precondition and access transfer . 45g36A.5 SDP media description conflict between target and remote access leg 45g36A.6 Indicating traffic leg . 45g36A.6.1
25、The SCC AS server procedure for indicating traffic leg . 45g36A.6.2 The MSC server procedure for indicating traffic leg 45g36A.6.3 The ATCF server procedure for indicating traffic leg 46g36A.7 MSC server . 46g36A.7.1 Precondition and access transfer . 46g37 Roles for call origination for service con
26、tinuity . 46g37.1 Introduction 46g37.2 SC UE . 46g37.2.1 General 46g37.2.2 Additional procedures with MSC server assisted mid-call feature . 47g37.3 SCC AS 47g37.3.1 Distinction of requests sent to the SCC AS 47g37.3.2 Call origination procedures at the SCC AS 48g37.3.3 Subscription related procedur
27、es in the SCC AS . 48g37.4 EATF 49g37.4.1 Distinction of requests sent to the EATF 49g37.4.2 Call origination procedures at the EATF 49g37.5 Access Transfer Control Function (ATCF) 49g37.5.1 Distinction of requests 49g37.5.2 Call origination procedures in the ATCF 50g37.5.2.1 General 50g37.5.2.2 Ses
28、sions originated in PS domain . 50g37.5.2.3 Sessions originated in CS domain . 51g37.5.3 Procedures in the ATCF for originating requests not related to a call 52g37.6 MSC server . 52g37.6.1 Call origination procedures . 52g38 Roles for call termination for service continuity 53g38.1 Introduction 53g
29、38.2 SC UE . 53g38.3 SCC AS 54g38.3.1 Distinction of requests sent to the SCC AS 54g38.3.2 Call termination procedures in the SCC AS . 54g38.4 Access Transfer Control Function (ATCF) 56g38.4.1 Distinction of requests 56g38.4.2 Call termination procedures in the ATCF . 56g38.4.2.1 General 56g38.4.2.2
30、 Sessions terminated in PS domain 56g38.4.2.3 Sessions terminated in CS domain 57g38.5 MSC server . 58g38.5.1 Distinction of requests 58g38.5.2 Call termination procedures 59g38.5.2.1 SIP INVITE request from home network 59g3ETSI ETSI TS 124 237 V13.6.0 (2017-01)53GPP TS 24.237 version 13.6.0 Releas
31、e 138.5.2.2 SIP INVITE request from ATCF 59g39 Roles for PS-CS access transfer . 60g39.1 Introduction 60g39.1A Additional procedures with MSC Server assisted mid-call feature 60g39.2 SC UE . 60g39.2.0 General 60g39.2.1 SC UE not using ICS procedures for PS to CS access transfer . 60g39.2.1AA SC UE u
32、sing ICS procedures for PS to CS access transfer . 62g39.2.1A SC UE procedures for PS to CS access transfer with MSC server assisted mid-call feature 63g39.2.1B SC UE procedures for PS to CS access transfer with MSC server assisted mid-call feature for speech and video session 66g39.2.2 SC UE proced
33、ures for CS to PS access transfer . 67g39.2.2.1 Distinction of request 67g39.2.2.2 SC UE procedure for transferring the first CS call 67g39.2.3 SC UE procedures for CS to PS access transfer with MSC server assisted mid-call feature 68g39.2.4 SC UE procedures for selecting a session in an early dialo
34、g phase to be transferred using PS to CS dual radio access transfer procedure . 69g39.2.5 SC UE procedures for CS to PS dual radio access transfer of calls in an early phase 70g39.2.5.1 Conditions for CS to PS dual radio access transfer of calls in originating pre-alerting or in the alerting phase 7
35、0g39.2.5.2 SC UE procedure for CS to PS dual radio access transfer of calls in originating pre-alerting or in the alerting phase 71g39.2.5.3 SC UE procedures for transferring an additional CS session in an early phase 72g39.3 SCC AS 73g39.3.0 General 73g39.3.1 Distinction of requests sent to the SCC
36、 AS 73g39.3.2 SCC AS procedures for PS to CS access transfer . 73g39.3.2A SCC AS procedures for PS to CS access transfer with MSC server assisted mid-call feature . 77g39.3.3 SCC AS procedures for CS to PS access transfer . 81g39.3.4 SCC AS procedures for CS to PS access transfer with MSC server ass
37、isted mid-call feature . 82g39.3.5 SCC AS procedures for PS to CS dual radio access transfer of calls in an early dialog phase . 84g39.3.5.1 Conditions for selecting a sessions in an early dialog phase . 84g39.3.5.2 SCC AS procedures for PS to CS dual radio access transfer of a originating session i
38、n the alerting phase 85g39.3.5.3 SCC AS procedures for PS to CS dual radio, access transfer of a originating session in the pre-alerting phase 87g39.3.5.4 SCC AS procedures for PS to CS dual radio access transfer of an additional session in an early dialog phase. 89g39.3.5.5 SCC AS procedures for PS
39、 to CS dual radio access transfer of a terminating session in the alerting phase 90g39.3.6 Removal of non-transferred audio media components and release of source access legs. 91g39.3.7 SCC AS procedures for CS to PS dual radio access transfer for calls in an early phase 92g39.3.7.1 Conditions for t
40、ransferring dialog(s) in the originating pre-alerting or the alerting dialog phase . 92g39.3.7.2 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 . 92g39.3.7.3 SCC AS procedures for CS to PS dual radio
41、access transfer for a call in the alerting phase on the terminating side . 94g39.3.7.4 SCC AS procedures for PS to CS dual radio access transfer of an additional session in an early dialog phase. 95g39.4 MSC server enhanced for ICS 98g39.4.1 Void 98g39.4.1A Void 98g39.5 PS to CS session continuity w
42、ith MSC server assisted mid-call feature 98g39.6 PS to CS session continuity with MSC server assisted mid-call feature for speech and video session 101g39.7 MSC procedures for PS to CS dual radio access transfer of calls in an early phase 101g39.8 MSC server enhanced for dual radio access transfer u
43、sing a SIP interface 103g39.8.1 General 103g310 Roles for PS-PS access transfer 104g310.1 Introduction 104g310.2 SC UE . 104g3ETSI ETSI TS 124 237 V13.6.0 (2017-01)63GPP TS 24.237 version 13.6.0 Release 1310.2.0 General 104g310.2.1 Full session transfer 104g310.2.1A Void 108g310.2.2 Partial session
44、transfer 108g310.2.3 Void 109g310.3 SCC AS 109g310.3.1 Distinction of requests sent to the SCC AS 109g310.3.2 PS to PS access transfer procedures at the SCC AS . 109g310.3.3 Void 114g310.3.4 S-CSCF releasing the source access leg during PS to PS access transfer . 114g310.3.5 P-CSCF releasing the sou
45、rce access leg during PS to PS access transfer . 114g310.3.6 P-CSCF releasing early dialog during PS to PS access transfer . 114g311 Roles for PS-PS access transfer in conjunction with PS-CS access transfer 115g311.1 Introduction 115g311.2 SC UE . 115g311.2.1 SC UE procedures for PS to PS+CS access
46、transfer . 115g311.2.1.1 General 115g311.2.1.2 SC UE procedures for PS to PS+CS access transfer using ICS 115g311.2.1.3 SC UE procedures for PS to PS+CS access transfer not using ICS 116g311.2.1.4 SC UE procedures for PS to PS+CS access transfer not using ICS with MSC server assisted mid-call featur
47、e . 116g311.2.2 SC UE procedures for PS+CS to PS access transfer . 117g311.2.2.1 General 117g311.2.2.2 SC UE procedures for PS+CS to PS access transfer using ICS 117g311.2.2.3 SC UE procedures for PS+CS to PS access transfer not using ICS 117g311.3 SCC AS 118g311.3.1 Distinction of requests sent to
48、the SCC AS 118g311.3.2 SCC AS procedures for PS to PS+CS access transfer 118g311.3.3 SCC AS procedures for PS+CS to PS access transfer 119g312 Roles for PS-CS access transfer, Single Radio 119g312.1 Introduction 119g312.2 SC UE procedures for PS to CS access transfer, PS to CS SRVCC . 120g312.2.1 Ge
49、neral 120g312.2.2 ICS-based 120g312.2.3 Not based on ICS 121g312.2.3A Not based on ICS with MSC Server assisted mid-call feature 121g312.2.3B Call in alerting phase 123g312.2.3B.1 General 123g312.2.3B.1A Considerations for MSC server assisted mid-call feature . 126g312.2.3B.2 Assignment of Transaction Identifiers to the transferred sessions 127g312.2.3B.3 Single call in alerting phase or pre-alerting phase . 127g312.2.3B.3.1 Terminating call in alerting phase . 127g312.2.3B.3.2 Originating call in alerting phase . 127g312.2.3B.3.3 PS to CS SRVCC for originating calls in pre-a
