ETSI TR 123 981-2017 Universal Mobile Telecommunications System (UMTS) LTE Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations.pdf

1、 ETSI TR 123 981 V14.0.0 (2017-05) Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 14.0.0 Release 14) TECHNICAL REPORT ETSI ETSI TR 123 981 V14.0.0 (2017-05)13GPP

2、 TR 23.981 version 14.0.0 Release 14Reference RTR/TSGS-0223981ve00 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、owned by the GSM Association. ETSI ETSI TR 123 981 V14.0.0 (2017-05)23GPP TR 23.981 version 14.0.0 Release 14Intellectual 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 pub

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12、 may become, essential to the present document. Foreword This Technical Report (TR) 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

13、be interpreted as being 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 “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 TR 123 981 V14.0.0 (2017-05)33GPP TR 23.

15、981 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g33 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Symbols 7g33.3 Abbreviations . 7g34 Architectural Requirements

16、8g34.1 General . 8g34.2 Operational aspects for GPRS system 8g34.2.1 Support of PDP type IPv6 . 8g34.2.2 GPRS network/nodes 9g35 Architectural concept . 9g35.1 General . 9g35.2 UE access to IM CN subsystem . 10g35.2.1 Obtaining IP address and P-CSCF discovery . 10g35.2.2 Scenarios . 11g35.2.2.1 IMS

17、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 subsystem 12g35.2.3 IP Versions in UE and P-CSCF 12g35.2.4 IP Versions in SGSN and GGSN 12g35.2.4.1 General 12g35.2.4.2 Implications of not suppor

18、ting 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 . 13g35.3.2 Overview 13g35.3.3 Non-roaming access to IMS scenarios 14g35.3.3.1 Non-roaming - IPv4 IM CN subsystem 14g35.3.3.2 Non-roaming dual stac

19、k IM CN subsystem 14g35.3.3.3 Non-roaming IPv6 IM CN subsystem . 15g35.3.4 GPRS access scenarios . 15g35.3.4.1 Non-roaming scenario, dual stack home network . 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

20、.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 Interconnection 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

21、.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 support in dual stack IM CN subsystem 21g35.3.7.3 Access to network services . 22g35.4 Migration scenarios 22g3ETSI ETSI TR 123 981 V14.0.0 (2017-

22、05)43GPP TR 23.981 version 14.0.0 Release 145.4.1 IPv4 UE and IPv6 IM CN subsystem . 22g35.4.2 A partially migrated IPv4 to IPv6 IM CN subsystem . 22g35.4.3 Migration 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 Acce

23、ss to network services . 22g35.4.4 Example migration paths 23g36 Conclusions and recommendations 23g3Annex A: Additional Information 24g3A.1 GPRS deployment scenarios 24g3A.1.1 IMS roaming access IPv4 visited network, IPv4 home network . 24g3A.1.2 IMS roaming access - IPv4 visited network, IPv6 home

24、 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 26g3A.2 End to End scenarios 26g3A.2.1 Non-roaming - IPv4 IM CN subsystem with IPv6 IM CN subsystem 27g3A.2.2 Non-roaming - IPv4 IM CN subsyste

25、m with IPv4 IM CN subsystem 27g3A.2.3 Non-roaming IPv4 IM CN subsystem with dual stack IM CN subsystem 28g3A.2.4 Non-roaming dual stack IM CN subsystem with dual stack IM CN subsystem . 28g3A.2.5 Non-roaming IPv6 IM CN subsystem with dual stack IM CN subsystem 29g3Annex B: Change history 30g3History

26、 31g3ETSI ETSI TR 123 981 V14.0.0 (2017-05)53GPP TR 23.981 version 14.0.0 Release 14Foreword This Technical Report has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TS

27、G 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 as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approv

28、al; 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, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduc

29、tion 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 TS 23.221 3. Therefore it is understood that there will exist IPv4 based IMS implementations, namely initial IMS implementations and IMS impl

30、ementations based on 3GPP2 specifications. This is the motivation to study interworking and migration scenarios related to IPv4 based IMS implementations. ETSI ETSI TR 123 981 V14.0.0 (2017-05)63GPP TR 23.981 version 14.0.0 Release 141 Scope The present document studies study interworking and migrat

31、ion scenarios related to IPv4 based IMS implementations. The study provides guidelines for operators and vendors on interworking aspects of IPv4 based IMS implementations, and provides guidelines on migrating to 3GPP IMS using IPv6. 2 References The following documents contain provisions which, thro

32、ugh 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 specific reference, subsequent revisions do not apply. - For a non-specific reference, the la

33、test 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 present document. 1 Void. 2 3GPP TS 21.905: “Vocabulary for 3GPP Specifications“. 3 3GPP TS 23.

34、221: “Architectural Requirements“. 4 3GPP TS 23.228: “IP Multimedia (IM) Subsystem - Stage 2“. 5 3GPP TS 23.141: “Presence Service; Architecture and Functional Description“. 6 3GPP TS 23.060: “General Packet Radio Service (GPRS); Service description; Stage 2“. 7 3GPP TS 33.203: “3G security; Access

35、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 Addressing Protocol (ISATAP)“, work in progress. Editors note: The above document cannot be formally referenced until it is published as an RFC. 9

36、 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 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

37、3“. 14 3GPP TS 27.060: “Mobile Station (MS) supporting Packet Switched Services“. 15 IETF RFC 2507: “IP Header Compression“. ETSI ETSI TR 123 981 V14.0.0 (2017-05)73GPP TR 23.981 version 14.0.0 Release 143 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present documen

38、t, 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 entities support IPv4 and IPv6 for IMS communication. It is an IM CN

39、 subsystem implementation that supports both IPv6 as per 3GPP Release 5 or later standards, and an IPv4 IM CN subsystem. IPv4 based IM CN subsystem implementation, IPv4 IM CN subsystem: For the purpose of this technical report, an IPv4 based IM CN subsystem implementation (or short: IPv4 IM CN subsy

40、stem) 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 implementation, IPv4 UE: For the purpose of this technical report, an IPv4 based UE implementation (or short: IPv4 UE) means a UE implementation, which is

41、 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 IM CN subsystem: For the purpose of this technical report, an IPv6 based IM CN subsystem implementation (or short: IPv6 IM CN subsystem) means

42、 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 UE 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

43、 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 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 subsys

44、tem. 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 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 Abbreviatio

45、ns For the purposes of the present document, the following abbreviations apply: ALG Application Level Gateway CN Core NetworkCSCF Call/Session Control Function DHCP Dynamic Host Configuration Protocol DNS Domain Name System GGSN Gateway GPRS Support Node GPRS General Packet Radio Service GSN GPRS Su

46、pport Note I-CSCF Interrogating CSCFIM IP MultimediaIMS IP Multimedia Subsystem IM-MGW IP Multimedia Media GateWay IP Internet Protocol IPSec IP Security protocol MRFP Multimedia Resource Function Processor NAT Network Address Translation ETSI ETSI TR 123 981 V14.0.0 (2017-05)83GPP TR 23.981 version

47、 14.0.0 Release 14NA(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 Quality of Service S-CSCF Serving-CSCF SGSN Serving GPRS Support Nod

48、e SIP Session Initiation Protocol SMS Short Message Service TrGW Transition GatewayUE User Equipment 4 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

49、 IPv4 or IPv6. IMS security shall be possible for both IPv4 and IPv6 IMS networks and UEs accessing these networks. SIP Compression shall be possible for both IPv4 and IPv6 IMS networks and UEs accessing these networks. P-CSCF discovery mechanisms shall be possible for both IPv4 and IPv6 IMS networks and UEs accessing these networks. An IPv4 IM CN Subsystem shall be able to interwork with an IPv4 IM CN Subsystem. An IPv4 IM CN Subsystem shall be able to interwork with an IPv6 IM CN Subsystem. A dual stack IM CN Subsystem shall