ETSI TR 129 909-2018 Digital cellular telecommunications system (Phase 2+) (GSM) Universal Mobile Telecommunications System (UMTS) LTE Diameter-based protocols usage and recommenda.pdf

1、 ETSI TR 129 909 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Diameter-based protocols usage and recommendations in 3GPP (3GPP TR 29.909 version 15.0.0 Release 15) TECHNICAL REPORT ETSI ETSI TR 129 909 V15.0.0

2、(2018-07)13GPP TR 29.909 version 15.0.0 Release 15Reference RTR/TSGC-0329909vf00 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 Association but non lucratif enregistre la S

3、ous-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 document shal

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9、n. ETSI ETSI TR 129 909 V15.0.0 (2018-07)23GPP TR 29.909 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 a

10、vailable for ETSI 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 s

11、erver (https:/ipr.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 be

12、come, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or r

13、eproduce any trademark 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 Pr

14、oject (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

15、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“, “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 o

16、f provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 129 909 V15.0.0 (2018-07)33GPP TR 29.909 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5

17、g31 Scope 6g32 References 6g33 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Symbols 7g33.3 Abbreviations . 7g34 The status of Diameter in 3GPP . 7g34.1 General . 7g34.2 Diameter-based applications before Release 8 . 7g34.3 Problem description 8g34.4 Existing and ongoing effort

18、9g35 Proposed alternatives rules for identified problems . 9g35.1 General . 9g35.2 Item 1: Setting of “M“ bit on 3GPP defined AVPs 9g35.2.0 General 9g35.2.1 Proposal 1 (IETF) . 9g35.2.2 Proposal 2 . 10g35.2.3 3GPP evaluation . 10g35.3 Item 2: Re-use of AVPs 10g35.3.1 General 10g35.3.2 Proposal 1 . 1

19、0g35.3.3 Proposal 2 (IETF) . 10g35.3.4 3GPP evaluation . 10g35.4 Item 3: Version handling 10g35.4.0 General 10g35.4.1 Proposal 1 . 11g35.4.2 Proposal 2 . 11g35.4.3 Proposal 3 - IETF 11g35.4.4 Proposal 4 . 11g35.4.5 Proposal 5 . 11g35.4.5.1 General 11g35.4.5.2 Defining new functionality . 12g35.4.5.2

20、.1 General 12g35.4.5.2.2 Changing the version of the interface 12g35.4.5.2.3 Capabilities Exchange Request . 12g35.4.5.2.4 Capabilities Exchange Answer 12g35.4.5.2.5 AVPs . 13g35.4.5.2.5.1 Supported-Application-Variant AVP 13g35.4.5.2.5.2 Vendor-Specific-Application-Variant AVP 13g35.4.6 3GPP evalua

21、tion . 13g35.5 Item 4: Setting of a new Application-Id . 14g35.5.0 General 14g35.5.1 Proposal 1 - IETF 14g35.5.2 Proposal 2 . 15g35.5.3 Proposal 3 . 15g35.5.4 3GPP evaluation . 15g35.6 Item 5: New Values to an existing enumerated AVP . 16g35.6.1 Proposal 1 . 16g3ETSI ETSI TR 129 909 V15.0.0 (2018-07

22、)43GPP TR 29.909 version 15.0.0 Release 155.6.2 Proposal 2 . 16g35.6.3 Proposal 3 . 16g35.6.4 Proposal 4 . 16g35.6.5 Proposal 5 . 16g35.6.6 3GPP evaluation . 16g35.7 Item 6: Re-use of commands in new applications 17g35.7.0 General 17g35.7.1 Proposal 1 . 17g35.7.2 3GPP evaluation . 17g36 Conclusion 1

23、7g3Annex A (Informative): Roaming Infrastructure 18g3A.0 General . 18g3A.1 Deployment of S6a-Diameter Relay Pools. 18g3A.2 Deployment of S9 and Wd*-Diameter Relay Pools . 20g3A.3 Guidelines for connecting to the inter-operator Diameter infrastructure 20g3A.4 Void 20g3Annex B (Normative): Diameter ro

24、uting extensions 21g3B.0 General . 21g3B.1 Realm-based routing. 21g3B.2 NAI decoration . 21g3B.3 Explicit routing . 21g3B.4 Preserving the User-Name AVP . 21g3Annex C: Change history 22g3History 23g3ETSI ETSI TR 129 909 V15.0.0 (2018-07)53GPP TR 29.909 version 15.0.0 Release 15Foreword This Technica

25、l Report has been produced by the 3rdGeneration Partnership 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 w

26、ith 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 approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented fo

27、r 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. Introduction As a new generation AAA (Authentication, Authorization and Accounting) protocol, Diameter has been use

28、d widely and will be used more and more widely in 3GPP. Since several 3GPP WGs are developing Diameter based interfaces, e.g. CT3, CT4, etc, so in order to ensure correctness and consistency of using Diameter within all 3GPP WGs, a common set of principles, rules and recommendations across 3GPP WGs

29、are necessary to be given clearly and followed. The present is to describe existing status of Diameter usage within 3GPP, find existing inconsistency of rules used for Diameter based interfaces which were specified in 3GPP and propose common recommendations of using Diameter to all 3GPP WGs to follo

30、w. With more and more Diameter deployment, an inter-operator Diameter signalling network infrastructure will become necessary, so the present document will also study Diameter inter-operator considerations with brief guidelines on how to deploy Stage 3“. 6 IETF RFC 4072 (August 2005): “Diameter Exte

31、nsible Authentication Protocol (EAP) Application“. 7 3GPP TS 32.299: “Diameter charging applications “. 8 3GPP TS 29.229: “Cx and Dx interfaces based on the Diameter protocol; Protocol details“. 9 3GPP TS 29.230: “Diameter applications; 3GPP specific codes and identifiers“. 10 3GPP TS 29.061: “Inter

32、working between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)“ 11 IETF Draft, “Diameter Base Protocol“, draft-ietf-dime-rfc3588bis-08.txt, working in progress. 12 IETF Draft, “Diameter Applications Design Guidelines“, draft-ietf-dime-app-design

33、-guide-03.txt, working in progress. 13 GSMA PRD IR.34 v4.1, “Inter-Service Provider IP Backbone Guidelines“ 14 GSMA PRD IR.67 v2.1.0, “DNS Guidelines for Operators“ ETSI ETSI TR 129 909 V15.0.0 (2018-07)73GPP TR 29.909 version 15.0.0 Release 1515 GSMA PRD IR.40 v4.0, “Guidelines for IPv4 Addressing

34、and AS Numbering for GPRS Network Infrastructure and Mobile Terminals“ 16 Void 17 3GPP TS 23.003: “Numbering, addressing and identification; Stage 3“ 18 IETF RFC 4282, “The Network Access Identifier“ 19 3GPP TS 24.234: “3GPP System to WLAN Interworking; UE to Network protocols; Stage 3“ 20 IETF Draf

35、t, “Diameter User-Name and Realm Based Request Routing Clarifications“, draft-korhonen-dime-nai-routing-02.txt, Work in progress. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 1 and the following a

36、pply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 1. (none) 3.2 Symbols For the purposes of the present document, the following symbols apply: (none) 3.3 Abbreviations For the purposes of the present document, the abbreviati

37、ons given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. SAE System Architecture Evolution SDO Standard Development Organization 4 The status of Diameter in 3GPP

38、4.1 General This subclause describes current status of Diameter usage before Release 8 and summarizes some problems of using Diameter protocol to satisfy 3GPP-specific requirements in the past. This subclause is a basis for further discussion to give proposed rules in subclause 5. 4.2 Diameter-based

39、 applications before Release 8 Diameter Base Protocol (see IETF RFC 3588 2) provides a set of messages and parameters to support AAA-related functionality with built-in protocol management mechanism, e.g. peer discovery, message routing, error handling, etc. Based on Diameter Base Protocol, IETF als

40、o defines many Diameter applications to support more specific requirements in different scenarios, e.g. NASREQ (see IETF RFC 4284 3), Diameter Credit Control (see IETF RFC 4006 4), etc. Another important feature of Diameter Base Protocol 2 is that it also provides a set of principles and rules for e

41、xtensibility to support more functionality in the future. That allows other SDOs like 3GPP to define more specific applications, messages, parameters (AVPs) and values to fulfil SDO-specific requirements. Because of powerful functions and good extensibility, since Release 5, Diameter has been used w

42、idely in 3GPP systems, e.g. IMS, GBA, Interworking WLAN, Charging systems, PCC, etc. ETSI ETSI TR 129 909 V15.0.0 (2018-07)83GPP TR 29.909 version 15.0.0 Release 15The Diameter protocol is designed to be extensible, using several mechanisms, including defining new AVP values, creating new AVPs, crea

43、ting new Diameter applications, in addition to reuse of existing AVP values, AVPs and Diameter applications (see IETF RFC 3588 2 for more details). Based on different principles and requirements, 3GPP WGs, i.e. CT3, CT4 and SA5, develop their Diameter-based interfaces with different approach. Some i

44、nterfaces are based on existing IETF-defined Diameter applications, for example Wa interface (see 3GPP TS 29.234 5) is based on Diameter base protocol (IETF RFC 3588 2), NASREQ (IETF RFC 4005 3) and Diameter EAP application (IETF RFC 4072 6). Some interfaces are based on existing IETF-defined Diamet

45、er applications with 3PPP-specific AVPs/Values, for example Ro interfaces (see 3GPP TS 32.299 7) is based on Diameter Credit-Control Application (IETF RFC 4006 4) with some new 3GPP-specific AVPs. And some interfaces are new 3GPP-specific Diameter applications, e.g. Cx interface specified in 3GPP TS

46、 29.229 8 which includes 3GPP-specific commands, AVP codes and results codes. 3GPP TS 29.230 9 serves as a placeholder for all 3GPP-specific Diameter applications, commands, AVP codes and result codes. 4.3 Problem description During developing Diameter based interfaces, some inconsistent rules are f

47、ound about how to using Diameter protocol to satisfy 3GPP-specific requirements in different 3GPP WGs. This subclause describes some examples of this issue. Wx interface, between a 3GPP AAA Server and a HSS, is specified in 3GPP TS 29.234 5 by CT4. A new application ID is allocated to it as some new

48、 AVPs with “M“ bit set are added to existing commands, e.g. 3GPP-AAA-Server-Name AVP, WLAN-User-Data AVP, etc. Wm interface, between a PDG and a 3GPP AAA Server/Proxy, is specified in 3GPP TS 29.234 5 by CT4. For example, the 3GPP-WLAN-APN-Id AVP, with “M“ bit set (see table 10.1.1 in section 10.1,

49、3GPP TS 29.234 5), is a 3GPP-defined AVP and added to AAR command for authorization purpose, but no new application is applied for Wm interface. Gmb interface, between a GGSN and a BM-SC, is specified in 3GPP TS 29.061 10 by CT3. A new application ID is allocated to it as some new AVPs with “M“ bit set are added to existing commands, e.g. TMGI AVP, Required-MBMS-Bearer-Capabilities AVP, etc. So it is seen that cross CT WGs there are some inconsistent principles or rules of usage of application IDs and 3GPP