1、 ETSI TR 180 003 V3.1.1 (2012-04) Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Technical Report on NGN National IP Interconnection Technical Report ETSI ETSI TR 180 003 V3.1.1 (2012-04) 2Reference DTR/TISPAN-00008-NGN-R3 Keywords interconnection,
2、 NNI, IP, IMS 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 Grasse (06) N 7803/88 Important notice Individual copies of the present
3、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 perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of d
4、ispute, 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 should be aware that the document may be subject to revision or change of status. Information on the current status of this and othe
5、r 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 services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by
6、written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2012. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and L
7、TE are Trade Marks of ETSI 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 TR 180 003 V3.1.1 (2012-04) 3Contents Intellectual Property Rights 4g3Foreword . 4g31 Scope 5g32 R
8、eferences 5g32.1 Normative references . 5g32.2 Informative references 5g33 Abbreviations . 6g34 National IP Interconnection 7g34.1 Calling Identity . 7g34.2 Number Formats . 8g34.3 Prefix Digits . 8g34.4 Carrier Selection . 9g34.5 Domain name conventions . 9g34.6 Diversion header and History-Info he
9、ader . 9g34.7 SIP to/from SIP-I interworking 10g34.8 Number Portability . 12g34.9 Emergency caller location data conveyance . 12g3History 13g3ETSI ETSI TR 180 003 V3.1.1 (2012-04) 4Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to
10、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 notified to ETSI in respect of ETSI standards“, which is avai
11、lable from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/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 00
12、0 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). E
13、TSI ETSI TR 180 003 V3.1.1 (2012-04) 51 Scope The present document provides guidance for handling IMS-based NGN national IP interconnection details. Interconnection of NGNs represents a broad area of study including such areas as signalling interconnection, media interconnection, routing, address re
14、solution, security, charging and network management. However, as with most aspects of the NGN, there are many Standards Development Organizations (SDOs) and industry bodies that are working on this topic. As organizations such as ITU-T, 3GPP, GSMA and the i3 Forum do focus on overarching IP intercon
15、nection specifications and agreements, a gap on guidelines for the handling of national IP interconnection was identified. The present document is intended to fill this gap for IMS based NGN national IP interconnection in co-relation with the IMS approach of 3GPP. 2 References References are either
16、specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are
17、not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced d
18、ocuments are necessary for the application of the present document. Not applicable. 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ETSI TS 122 228: “Dig
19、ital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Service requirements for the Internet Protocol (IP) multimedia core network subsystem (IMS); Stage 1 (3GPP TS 22.228)“. i.2 ETSI TS 129 165: “Digital cellular telecommunications system (Phase 2+);
20、Universal Mobile Telecommunications System (UMTS); LTE; Inter-IMS Network to Network Interface (NNI) (3GPP TS 29.165)“. i.3 ETSI TS 184 011: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Requirements and usage of E.164 numbers in NGN and NGCN“. i
21、.4 IETF RFC 3966 (December 2004): “The tel URI for Telephone Numbers“. i.5 IETF RFC 4694 (October 2006): “Number Portability Parameters for the “tel“ URI“. i.6 ITU-T Recommendation Q.1912.5: “Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN
22、User Part“. ETSI ETSI TR 180 003 V3.1.1 (2012-04) 6i.7 ETSI EN 383 001: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control (BICC) Protocol or ISDN User Part (IS
23、UP) ITU-T Recommendation Q.1912.5, modified“. i.8 IETF RFC 4904 (June 2007): “Representing Trunk Groups in tel/sip Uniform Resource Identifiers (URIs)“. i.9 IETF RFC 6044 (October 2011): “Mapping and Interworking of Diversion Information between Diversion and History-Info Headers in the Session Init
24、iation Protocol (SIP)“. i.10 ETSI TS 124 229: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP TS 24.229
25、)“. i.11 ETSI TS 129 163: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP TS 29.163)“. i.12 IETF RFC 4244 (November 2005):
26、“An Extension to the Session Initiation Protocol (SIP) for Request History Information“. i.13 IETF RFC 5806 (March 2010): “Diversion Indication in SIP“. i.14 ETSI TS 129 235: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Interworking
27、between SIP-I based circuit-switched core network and other networks (3GPP TS 29.235)“. i.15 IETF RFC 3482 (September 2003): “Number Portability in the Global Switched Telephone Network (GSTN): An Overview“. i.16 ITU-T Recommendation Q.769.1: “Signalling system No. 7 - ISDN user part enhancements fo
28、r the support of number portability“. . i.17 ETSI TR 184 003: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Portability of telephone numbers between operators for Next Generation Networks (NGNs)“. i.18 EC Mandate M/493: “Standardisation Mandate t
29、o the European Standards Organisations (ESO) in support of the location enhanced emergency call service“. 3 Abbreviations For the purposes of the present document, the following abbreviations apply: CC Country Code CIC Carrier Identification Code CN Core Network CS Circuit SwitchedCS-IBCF CS (domain
30、) IBCF ENUM Electronic NUMber GSMA Global System for Mobile communications Association IBCF Interconnection Border Control Function IM IP Multimedia IMS IP Multimedia Subsystem INAP Intelligent Network Application Part IP Internet ProtocolISUP ISDN User Part IWU InterWorking Unit MGCF Media Gateway
31、Control Function NDC National Destination Code NGN Next Generation Network ETSI ETSI TR 180 003 V3.1.1 (2012-04) 7NNI Network to Network Interface NP Number Portability P-A-Id P-Asserted-Identity PES PSTN Emulation Subsystem PSTN Public Switched Telephone Network QoR Query on Release SDO Standards D
32、evelopment Organization SDP Session Description Protocol SIP Session Initiation Protocol SIP-I SIP with encapsulated ISUP SN Subscriber Number TDM Time Division Multiplexing TEL Telephony UMTS Universal Mobile Telecommunications System URI Uniform Resource Identifier VoIP Voice over IP 4 National IP
33、 Interconnection It is noted that work on IP Interconnect is ongoing in other standardisation bodies like 3GPP and in organisations such as the GSMA and the i3 Forum. The activities in those SDOs primarily deal with international interconnection. Hence the information provided in the present documen
34、t provides guidance on items of national IP interconnection which are not covered elsewhere. For the subject of IP Interconnection in general (not exclusive to national IP Interconnection only) guidance is given in the following 3GPP and ETSI deliverables: TS 122 228: “Digital cellular telecommunica
35、tions system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Service requirements for the Internet Protocol (IP) multimedia core network subsystem (IMS); Stage 1 (3GPP TS 22.228)“ i.1. TS 124 229: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunicati
36、ons System (UMTS); LTE; IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP TS 24.229)“ i.10. TS 129 165: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; I
37、nter-IMS Network to Network Interface (NNI) (3GPP TS 29.165)“ i.2. In TS 124 229 i.10 stage 3 specification text can be found on general interconnection issues like: URIs and address assignment in clause 4.2. Routing principles in clause 4.3. Trust domains in clause 4.4. Additional routeing capabili
38、ties in support of transit and interconnection traffics in IM CN subsystem in Annex I. 4.1 Calling Identity National IP Interconnection interfaces may be required to support the transfer in SIP of the Calling Identity between operators to meet national regulation matters (e.g. lawful intercept) with
39、 the following principles: The IP Interconnect between national operators should be considered to be a “trusted“ environment. In SIP the P-Asserted-Identity (P-A-Id) header field should be used to convey the Calling Identity between operator networks. If the Calling Identity is a telephone number it
40、 should be conveyed either in the international format or in national format based upon national decisions. ETSI ETSI TR 180 003 V3.1.1 (2012-04) 8 For redirected calls the History-Info header field should be used to convey the redirection information. Alternatively, the Diversion header field can b
41、e used based on bilateral agreements. See clause 4.6 for further details. No missing elements were identified in the SIP standards to support this national IP Interconnect item. 4.2 Number Formats Based on TS 129 165 i.2 clause 8 and TS 184 011 i.3 the following 2 basic practices are given as guidan
42、ce on national NGN IP Interconnect interfaces to support E.164 number formats in the SIP Request URI and other SIP header fields like To, From, History-Information, Diversion and P-Asserted-Identity: 1) Use of global number format only Unless bilateral agreement exist, a global number coding, as def
43、ined in RFC 3966 i.4, should be used in a TEL URI and in the user portion of a SIP URI with the user=phone parameter. In addition, use of one or more specific National Destination Codes (NDCs) may be used in front of national-only numbers like short codes (112, 114, etc.) and service codes when no o
44、verlap with E.164 number ranges exists. In this arrangement the number coding in SIP header fields is the global number as defined in RFC 3966 i.4 always starting with +, which implies that there is no need for the inclusion of the phone-context parameter to header fields. 2) Use of local number for
45、mat next to global number format If bilateral agreements exist between operators to transfer national E.164 numbers and national-only E.164 numbers in the local number coding as defined in RFC 3966 i.4, then the phone-context parameter should be added to SIP header fields which transfer a local numb
46、er in a TEL URI and in the user portion of a SIP URI with the user=phone parameter. Header fields without phone-context parameter should be in the global format and should be conveyed as such (see practice 1 above). NOTE 1: Transfer of national numbers in local format between operators implies that
47、the local number digits are set to (without prefix 0) and the phone-context is set to + for the transfer of the global number digits. For the transfer of short codes / service codes a bilaterally (nationally) agreed coding of the phone context parameter should be used. NOTE 2: The use of SIP and/or
48、SIP-I for national IP Interconnect is a bilateral (national) matter. With SIP additional transfer capabilities in specific parameters may be supported like the rn parameter according RFC 4694 i.5 for the transfer of additional Number Portability information for which the interworking to/from ISUP is
49、 specified in and TS 129 163 i.11. With SIP-I such additional capabilities are not described in ITU-T Recommendation Q.1912.5 i.6 and in EN 383 001 i.7. No missing elements or new capabilities were identified in the SIP standards to support this national IP Interconnect item. 4.3 Prefix Digits Within operator domains, and sometimes based on bilateral agreements between operators on the interconnections, prefix digits may be used as extensions to numbers to indicate specific routing arrangem
