1、 ETSI TS 129 421 V8.1.0 (2010-10)Technical Specification Digital cellular telecommunications system (Phase 2+);Universal Mobile Telecommunications System (UMTS);LTE;TISPAN;NGN Release 1;Endorsement of 3GPP TS 29.162 Interworking between IM CN Sub-system and IP networks (3GPP TS 29.421 version 8.1.0
2、Release 8)ETSI ETSI TS 129 421 V8.1.0 (2010-10)13GPP TS 29.421 version 8.1.0 Release 8Reference RTS/TSGC-0329421v810 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 Associ
3、ation but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or pe
4、rceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document shoul
5、d be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following serv
6、ices: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2010. All rights reserve
7、d. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being
8、 registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 129 421 V8.1.0 (2010-10)23GPP TS 29.421 version 8.1.0 Release 8Intellectual Property Rights IPRs essential or potentially
9、 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 members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs
10、notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarante
11、e 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 present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (
12、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 ETSI identities can be
13、found under http:/webapp.etsi.org/key/queryform.asp. ETSI ETSI TS 129 421 V8.1.0 (2010-10)33GPP TS 29.421 version 8.1.0 Release 8Contents Intellectual Property Rights 2g3Foreword . 2g3Foreword . 5g31 Scope 6g32 References 6g33 Abbreviations . 7g34 General . 7g34.1 General interconnection overview 7g
14、34.2 Interworking scenarios . 8g34.2.1 UE with TISPAN SIP profile capability connecting to an external SIP device 8g35 Network characteristics 8g35.1 Key characteristics of IP Multimedia Networks . 8g35.2 Key characteristics of IP Multimedia Subsystem . 8g36 Reference Model for control plane interwo
15、rking and user plane interworking 9g36.1 Interworking Functional Entities 9g36.1.1 IBCF . 9g36.1.2 I-BGF 9g36.1.3 IWF . 10g37 Control plane interworking 10g37.1 SIP with TISPAN IMS Profile to non-IMS SIP Interworking . 10g37.2 Procedures at the IBCF . 10g37.2.1 IBCF usage of SIP 10g37.2.2 IBCF proce
16、dures on SIP message bodies . 11g38 User Plane Interworking . 11g38.1 Overview 11g38.2 Transparent User Plane 11g38.3 Non Transparent User Plane . 11g39 IP Version Interworking at the IBCF/I-BGF 11g39.1 Control plane interworking. 11g39.1.1 Originating Session Set-up to SIP network using different I
17、P version . 11g39.1.1.1 Receipt of the first SDP offer 11g39.1.1.2 Receipt of the first SDP answer 12g39.1.2 Terminating Session set-up from SIP network using different IP version 12g39.1.2.1 Receipt of an SDP offer 12g39.1.2.2 Receipt of SDP answer 12g39.1.3 Change of connection information 13g39.1
18、.4 Release of the session . 13g39.2 User plane transport 13g39.2.1 Payload transport 13g39.2.2 IP header interworking 13g39.2.2.1 IPv4 to IPv6 13g39.2.2.2 Abnormal cases . 15g39.2.2.3 IPv6 to IPv4 . 15g39.2.2.4 Abnormal cases . 17g39.2.3 Fragmentation . 17g39.2.4 Abnormal cases . 17g310 Procedures f
19、or NAT at the IBCF/I-BGF 17g310.1 Control plane interworking. 17g310.1.1 Session set-up . 17g310.1.1.1 Receipt of the first SDP offer 17g3ETSI ETSI TS 129 421 V8.1.0 (2010-10)43GPP TS 29.421 version 8.1.0 Release 810.1.1.2 Receipt of the SDP answer 17g310.1.1.3 Procedures in support of forking . 18g
20、310.1.2 Change of media connection data . 18g310.1.3 Release of the session . 18g310.2 User plane . 18g3Annex A (informative): Bibliography . 19g3Annex B (informative): Change history 20g3History 21g3ETSI ETSI TS 129 421 V8.1.0 (2010-10)53GPP TS 29.421 version 8.1.0 Release 8Foreword This Technical
21、Specification (TS) was been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN) and originally published as ETSI TS 183 021 13. It was transferred to the 3rd Generation Partnership Project (3GPP) in in January 2008. T
22、he contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number a
23、s follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates
24、, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 129 421 V8.1.0 (2010-10)63GPP TS 29.421 version 8.1.0 Release 81 Scope The present document describes the interworking between the TISPAN IMS and an external IP network including
25、other IMS networks for IP multimedia service support. The present document addresses the areas of control and user plane interworking through the network functions, which include the IBCF and I-BGF. For the specification of control plane interworking, the interworking between IMS SIP and an external
26、 SIP profile are detailed in terms of the procedures required for the support of both IMS originated and terminated SIP sessions. In particular, the present document describes the protocol mappings for support of communications between networks using different IP versions or between networks with NA
27、Ts operating at their border. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a
28、specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the pres
29、ent document. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 IETF RFC 3261: “SIP: Session Initiation Protocol“. 2 IETF RFC 791: “Internet Protocol“. 3 IETF RFC 2460: “Internet Protocol, Version 6 (IPv6)
30、Specification“. 4 IETF RFC 2766: “Network Address Translation - Protocol Translation (NAT-PT)“. 5 IETF RFC 2663: “IP Network Address Translator (NAT) Terminology and Considerations“. 6 IETF RFC 3022: “Traditional IP Network Address Translator (Traditional NAT)“. 7 IETF RFC 3323: “A Privacy Mechanism
31、 for the Session Initiation Protocol (SIP)“. 8 IETF RFC 3325: “Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks“. 9 IETF RFC 2475: “An Architecture for Differentiated Services“. 10 IETF RFC 792: “Internet Control Message Protocol“. 11 IETF RFC
32、 2463: “Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification“. 12 ITU-T Recommendation Q.1912.5: “Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part“. 13 ETSI TS 183 021 V1.1.1: “Telecom
33、munications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Release 1; Endorsement of 3GPP TS 29.162 Interworking between IM CN Sub-system and IP networks“. ETSI ETSI TS 129 421 V8.1.0 (2010-10)73GPP TS 29.421 version 8.1.0 Release 83 Abbreviations For the purpose
34、s of the present document, the following abbreviations apply: B2BUA Back-to-Back User Agent BGCF Border Gateway Control Function BGF Border Gateway Function CDR Call Data Record CSCF Call Session Control Function DS Differentiated Services IBCF Interconnection Border Control Function I-BGF Interconn
35、ection Border Gateway Function IM IP Multimedia IMS IP Multimedia Subsystem IP Internet Protocol IPv4 IP version 4 IPv6 IP version 6 IWF InterWorking Function MRFP Multimedia Resource Function Processor NAT Network Address Translation NAPT Network Address and Port Translation NA(P)T-PT Network Addre
36、ss (Port-Multiplexing) Translation-Protocol Translation RACS Resource and Admission Control Subsystem RSVP Resource reSerVation Protocol SDP Session Description Protocol SIP UA SIP User Agent SIP Session Initiation Protocol UE User Equipment 4 General 4.1 General interconnection overview The IM Subs
37、ystem interworks with SIP RFC 3261 11 based IP Multimedia networks. These IP Multimedia networks include: SIP User Agents (UAs); SIP Servers. The IM Subsystem also interworks with non SIP-based IP multimedia networks (e.g. network controlled using H.323). The general interworking model is shown in f
38、igure 1. The IMS network and the SIP based Multimedia networks may use IP version 4 RFC 791 22 or IP version 6 RFC 2460 33. ETSI ETSI TS 129 421 V8.1.0 (2010-10)83GPP TS 29.421 version 8.1.0 Release 8SIP proxy SIP UA CSCF UE IBCF I-BGF IWF Scope of the present document IMS network IP multimedia netw
39、ork IPv4 or IPv6 IPv4 or IPv6 Non SIP-based MM network SIP-based MM network RACS Figure 1: Interworking Model for IMS to IP Multimedia Network The IMS uses the IBCF/I-BGF and possibly the IWF entity in order to communicate with external IP multimedia entities. The IBCF is inserted on the SIP signall
40、ing path between the CSCF/BGCF and external IP Multimedia networks. The I-BGF is inserted along the media path at IP interconnect between the IMS network and an external IP multimedia network. The IBCF and the I-BGF may be implemented as a part of other physical entities in the IMS. The IWF performs
41、 the interworking between the TISPAN SIP profile (ES 283 003 - see bibliography) and other IP multimedia protocols when required (e.g.H.323 or SIP-I as defined for profile C ITU-T Recommendation Q.1912.5 12). 4.2 Interworking scenarios 4.2.1 UE with TISPAN SIP profile capability connecting to an ext
42、ernal SIP device ES 283 003 (see bibliography) specifies the procedures used by a UE compliant to the TISPAN SIP profile to communicate with an external SIP device possibly lacking TISPAN SIP profile capabilities. 5 Network characteristics 5.1 Key characteristics of IP Multimedia Networks The Intern
43、et is a conglomeration of networks utilizing a common set of protocols. IP protocols are defined in the relevant IETF RFCs. IP multimedia networks provide the ability for users to invoke IP multimedia applications in order to send and receive (where applicable) voice and data communications. One pro
44、tocol used to manage IP multimedia sessions is the Session Initiation Protocol (SIP) (RFC 3261 11). 5.2 Key characteristics of IP Multimedia Subsystem The IMS uses the SIP protocol to manage IP multimedia sessions, and uses IP as the transport mechanism for both SIP session signalling and media tran
45、sport. ETSI ETSI TS 129 421 V8.1.0 (2010-10)93GPP TS 29.421 version 8.1.0 Release 86 Reference Model for control plane interworking and user plane interworking Figure 2 details the reference architecture required to support interworking between the IM subsystem and IP networks for IM services. BGCF
46、Signalling Bearer P-CSCF Gm/Mw IBCF RACS Gq Ia I-BGF Iz I/S-CSCF Ic IWF Iw IP Multimedia network IMS network Mm Ib Mw Mk Mm Mg/Mi Figure 2: IM Subsystem to external IM network interworking reference architecture Mm reference point: The call control protocol applied to the Mm interface between CSCF a
47、nd IBCF is based on SIP as detailed in ES 283 003 (see bibliography). Gq reference point: The protocol applied at the Gq reference point is based on Diameter and specified in TS 183 017 (see bibliography). Ia reference point: The protocol applied at the Ia reference point is based on H.248 and is sp
48、ecified in ES 283 018 (see bibliography). Ib reference point: The protocol applied at the Ib reference point between the IBCF and the IWF is based on SIP. Ic reference point: The protocol applied at the Iw reference point is based on SIP. The SIP end point located in the external multimedia network
49、may not support all the SIP extensions mandated by TISPAN. 6.1 Interworking Functional Entities 6.1.1 IBCF When used for interconnecting the IMS to an external SIP based multimedia network, the IBCF behaves as a SIP B2BUA. Further details of the functionality of the IBCF can found in ES 282 003 (see bibliography). 6.1.2 I-BGF The I-BGF is a transport level entity containing a set of optional functionalities including but not limited to NA(P)T, Gate functionality, and IP version interworking. The complete set of standard I-BG
