ETSI TR 123 981-2018 Universal Mobile Telecommunications System (UMTS) LTE Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations.pdf

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1、 ETSI TR 123 981 V15.0.0 (2018-06) Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 15.0.0 Release 15) TECHNICAL REPORT ETSI ETSI TR 123 981 V15.0.0 (2018-06)13GPP

2、 TR 23.981 version 15.0.0 Release 15Reference RTR/TSGS-0223981vf00 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 enregistre la Sous-Prfecture de G

3、rasse (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 document shall not be modified

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9、3 981 V15.0.0 (2018-06)23GPP TR 23.981 version 15.0.0 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 publicly available for ETSI

10、members 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.

11、etsi.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

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13、mark 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 Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The

14、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 found under

15、 http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “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 (Verbal forms for the expression of provisions). “mu

16、st“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 123 981 V15.0.0 (2018-06)33GPP TR 23.981 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5g31 Scope 6g32 Ref

17、erences 6g33 Definitions, symbols and abbreviations . 6g33.1 Definitions 6g33.2 Symbols 7g33.3 Abbreviations . 7g34 Architectural Requirements 8g34.1 General . 8g34.2 Operational aspects for GPRS system 8g34.2.1 Support of PDP type IPv6 . 8g34.2.2 GPRS network/nodes 8g35 Architectural concept . 9g35

18、.1 General . 9g35.2 UE access to IM CN subsystem . 9g35.2.1 Obtaining IP address and P-CSCF discovery . 9g35.2.2 Scenarios . 11g35.2.2.1 IMS dual Stack UE accessing an IM CN subsystem . 11g35.2.2.2 IPv4 UE and IPv4 based IM CN subsystem Implementation . 11g35.2.2.3 IPv4 UE and IPv6 based IM CN subsy

19、stem 11g35.2.3 IP Versions in UE and P-CSCF 11g35.2.4 IP Versions in SGSN and GGSN 12g35.2.4.1 General 12g35.2.4.2 Implications of not supporting IPv6 in SGSN . 12g35.3 Interworking scenarios . 12g35.3.1 Interworking architecture and NATs 12g35.3.1.1 Interworking architecture 12g35.3.1.2 NATs . 12g3

20、5.3.2 Overview 13g35.3.3 Non-roaming access to IMS scenarios 13g35.3.3.1 Non-roaming - IPv4 IM CN subsystem 13g35.3.3.2 Non-roaming dual stack IM CN subsystem 14g35.3.3.3 Non-roaming IPv6 IM CN subsystem . 14g35.3.4 GPRS access scenarios . 15g35.3.4.1 Non-roaming scenario, dual stack home network .

21、15g35.3.4.2 Roaming IPv4 visited network, dual stack home network . 15g35.3.4.3 Roaming IPv4 visited network, IPv6 IMS home network 16g35.3.4.4 Roaming dual stack visited network, IPv4 GGSN and Dual stack IMS. 17g35.3.4.5 Roaming dual stack visited network, IPv6 home network . 17g35.3.5 Interconnect

22、ion and end-to-end scenarios . 18g35.3.5.1 Overall Scenario 18g35.3.5.2 NAT/ALG between IMS entities within one operators IMS network 19g35.3.6 Summary of issues arising from the scenarios 20g35.3.7 IP version interworking for services . 20g35.3.7.1 Application servers 20g35.3.7.2 Interworking suppo

23、rt in dual stack IM CN subsystem 20g35.3.7.3 Access to network services . 21g35.4 Migration scenarios 22g35.4.1 IPv4 UE and IPv6 IM CN subsystem . 22g3ETSI ETSI TR 123 981 V15.0.0 (2018-06)43GPP TR 23.981 version 15.0.0 Release 155.4.2 A partially migrated IPv4 to IPv6 IM CN subsystem . 22g35.4.3 Mi

24、gration aspects for services 22g35.4.3.1 Application Servers . 22g35.4.3.2 Migration support in dual stack IM CN subsystem . 22g35.4.3.3 Access to network services . 22g35.4.4 Example migration paths 22g36 Conclusions and recommendations 23g3Annex A: Additional Information 24g3A.1 GPRS deployment sc

25、enarios 24g3A.1.1 IMS roaming access IPv4 visited network, IPv4 home network . 24g3A.1.2 IMS roaming access - IPv4 visited network, IPv6 home network 25g3A.1.3 IMS roaming access - IPv6 visited network, IPv4 home network 25g3A.1.4 IMS roaming access - IPv4 visited network, dual stack home network 26

26、g3A.2 End to End scenarios 26g3A.2.1 Non-roaming - IPv4 IM CN subsystem with IPv6 IM CN subsystem 26g3A.2.2 Non-roaming - IPv4 IM CN subsystem with IPv4 IM CN subsystem 27g3A.2.3 Non-roaming IPv4 IM CN subsystem with dual stack IM CN subsystem 27g3A.2.4 Non-roaming dual stack IM CN subsystem with du

27、al stack IM CN subsystem . 28g3A.2.5 Non-roaming IPv6 IM CN subsystem with dual stack IM CN subsystem 29g3Annex B: Change history 30g3History 31g3ETSI ETSI TR 123 981 V15.0.0 (2018-06)53GPP TR 23.981 version 15.0.0 Release 15Foreword This Technical Report has been produced by the 3rd Generation Part

28、nership Project (3GPP). The 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 inc

29、rease in version number as 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 enhanceme

30、nts, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction 3GPP specifications design the IMS to use exclusively IPv6, however early IMS implementations and deployments may use IPv4, as specified in clause 5.1 of

31、TS 23.221 3. Therefore it is understood that there will exist IPv4 based IMS implementations, namely initial IMS implementations and IMS implementations based on 3GPP2 specifications. This is the motivation to study interworking and migration scenarios related to IPv4 based IMS implementations. ETSI

32、 ETSI TR 123 981 V15.0.0 (2018-06)63GPP TR 23.981 version 15.0.0 Release 151 Scope The present document studies study interworking and migration scenarios related to IPv4 based IMS implementations. The study provides guidelines for operators and vendors on interworking aspects of IPv4 based IMS impl

33、ementations, and provides guidelines on migrating to 3GPP IMS using IPv6. 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,

34、 version number, etc.) or non-specific. - For a 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 versio

35、n of that document in the same Release as the present document. 1 Void. 2 3GPP TS 21.905: “Vocabulary for 3GPP Specifications“. 3 3GPP TS 23.221: “Architectural Requirements“. 4 3GPP TS 23.228: “IP Multimedia (IM) Subsystem - Stage 2“. 5 3GPP TS 23.141: “Presence Service; Architecture and Functional

36、 Description“. 6 3GPP TS 23.060: “General Packet Radio Service (GPRS); Service description; Stage 2“. 7 3GPP TS 33.203: “3G security; Access security for IP-based services“. 7a 3GPP TS 23.002: “Network Architecture“. 8 draft-ietf-ngtrans-isatap-21.txt (April 2004): “Intra-Site Automatic Tunnel Addre

37、ssing Protocol (ISATAP)“, work in progress. Editors note: The above document cannot be formally referenced until it is published as an RFC. 9 3GPP TS 24.008: “Mobile radio interface Layer 3 specification; Core network protocols; Stage 3“. 10 IETF RFC 2373: “IP Version 6 Addressing Architecture“. 11

38、OMA DM WG: “OMA Device Management 1.1.2“. 12 OMA: “OMA Client Provisioning 1.1“. 13 3GPP TS 24.167: “3GPP IMS Management Objects (MO); Stage 3“. 14 3GPP TS 27.060: “Mobile Station (MS) supporting Packet Switched Services“. 15 IETF RFC 2507: “IP Header Compression“. 3 Definitions, symbols and abbrevi

39、ations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TS 21.905 2 and the following apply. Dual stack IM CN subsystem: For the purpose of this technical report, a dual stack IM CN subsystem is an IM CN subsystem implementation in which all network entiti

40、es support IPv4 and IPv6 for IMS communication. It is an IM CN ETSI ETSI TR 123 981 V15.0.0 (2018-06)73GPP TR 23.981 version 15.0.0 Release 15subsystem implementation that supports both IPv6 as per 3GPP Release 5 or later standards, and an IPv4 IM CN subsystem. IPv4 based IM CN subsystem implementat

41、ion, IPv4 IM CN subsystem: For the purpose of this technical report, an IPv4 based IM CN subsystem implementation (or short: IPv4 IM CN subsystem) means an IM CN subsystem implementation, which is based on 3GPP Release 5 or later standards, but uses IPv4 rather than IPv6. IPv4 based UE implementatio

42、n, IPv4 UE: For the purpose of this technical report, an IPv4 based UE implementation (or short: IPv4 UE) means a UE implementation, which is based on 3GPP Release 5 or later IMS standards, but uses IPv4 rather than IPv6 to access an IM CN subsystem. IPv6 based IM CN subsystem implementation, IPv6 I

43、M CN subsystem: For the purpose of this technical report, an IPv6 based IM CN subsystem implementation (or short: IPv6 IM CN subsystem) means the IM CN subsystem implementation according to 3GPP Release 5 or later standards that uses IPv6. IPv6 UE: For the purpose of this technical report, an IPv6 U

44、E means a UE implementation, which is based on 3GPP Release 5 or later IMS standards and uses only IPv6 to access IM CN subsystem even though the IP stack in the UE as such may be a dual IPv4 and IPv6 stack. IMS dual stack UE: For the purpose of this technical report, an IMS dual stack UE means a UE

45、 implementation, which is based on 3GPP Release 5 or later IMS standards, but in addition to IPv6 can use IPv4 to access an IPv4 IM CN subsystem. 3.2 Symbols For the purposes of the present document, the following symbols apply: Gi Reference point between GPRS and a packet data network. Gm Reference

46、 Point between a UE and a P-CSCF. Gn Interface between two GSNs within the same PLMN. Mb Reference point to network services. 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: ALG Application Level Gateway CN Core NetworkCSCF Call/Session Control Function

47、 DHCP Dynamic Host Configuration Protocol DNS Domain Name System GGSN Gateway GPRS Support Node GPRS General Packet Radio Service GSN GPRS Support Note I-CSCF Interrogating CSCFIM IP MultimediaIMS IP Multimedia Subsystem IM-MGW IP Multimedia Media GateWay IP Internet Protocol IPSec IP Security proto

48、col MRFP Multimedia Resource Function Processor NAT Network Address Translation NA(P)T-PT Network Address (Port-Multiplexing) Translation-Protocol Translation OMA Open Mobile Alliance OTA Over the Air Activation PCO Protocol Configuration Options P-CSCF Proxy-CSCF PDP Packet Data Protocol QoS Qualit

49、y of Service S-CSCF Serving-CSCF SGSN Serving GPRS Support Node SIP Session Initiation Protocol SMS Short Message Service ETSI ETSI TR 123 981 V15.0.0 (2018-06)83GPP TR 23.981 version 15.0.0 Release 15TrGW Transition Gateway UE User Equipment4 Architectural Requirements 4.1 General An IMS dual stack UE shall be able to determine whether to use IPv4 or IPv6 when accessing the IMS. A dual stack IMS shall be able to determine whether to use IPv4 or IPv6. IMS security shall be possible for both IPv4 and IPv6 IMS networks and UEs ac