1、ETSI TR I01 913 1.1.1 (2001-05) Technical Report Interoperation of PENS with IP networks 2 ETSI TR 101 913 V1.l.l (2001-05) Reference DTWECMA-00191 Keywords interoperability, IP, network, PISN ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 6
2、5 47 16 Siret No 348 623 562 O0017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: htt!x/w.ettlsi. orq The present document may be made available in more than one electr
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5、yright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2001. All rights reserved. ETSI 3 ETSI TR 101 913 V1.l.l (2001-05) Contents Int
6、ellectual Property Rights 6 Foreword 6 Brief History 6 1 2 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 5 5.1 5.2 5.3 5.4 6 6.1 6.1.1 6.1.2 6.1.3 6.1.4 6.1.5 6.1.6 6.1.7 6.1.8 6.1.9 Scope 7 References 7 De finit ions 9 Corporate telecommunication Network (CN) . 9 Internet . 9 Intranet . 9 Internet Protoc
7、ol (IP) . 9 IP network . 9 Private Integrated Services Network (PISN) . 10 Switched Circuit Network (SCN) . 10 Tunnelling . 10 Private Integrated services Network exchange (PINX) . 10 Acronyms . 10 Introduction 12 Background . 12 Types ofnetwork . 13 Arrangements for interworking of SCNs and IP netw
8、orks 14 Arrangements for interconnection of SCN components over IP networks . 15 General principles of multimedia communication over an IP network . 15 Architecture 16 Media Processing and Packetization (MPP) functional entity 16 Resource Control (RC) functional entity . 17 Session Control (SC) func
9、tional entity 17 SC-Redirect (SC-R), SC-Proxy (SC-P) and RC-Proxy (RC-P) functional entities 18 Admission control (AC) functional entities . 18 Identity resolution (IR) functional entity . 19 Generic functional architecture (non-interworking) . 19 network (non-inter work in) 20 Registrar (RGR) and r
10、egistrant (RGT) functional entities 19 Physical realizations of generic functional architecture for multimedia communication over an IP II 6.1.10 6.1.11 6.2 Naming and addressing 25 6.3 Security . 25 6.4 Quality of service (QoS) 26 6.5 Mobility 27 7 Standards for multimedia communication over an IP
11、network . 28 7.1 Overview 28 7.2 The ITU-T H.323 family of recommendations . 29 7.2.1 Functional architecture . 29 7.2.2 Naming and addressing 30 7.2.3 Supplementary services 30 7.2.4 Security . 31 Quality of service . 32 7.2.6 Mobility . 32 Generic functional architecture for interworking with an S
12、CN 21 Physical realizations of generic functional architecture for interworking with an SCN . 22 6.1.12 Simple terminals 24 7.2.5 7.3 Other ITU-T standards . 33 ETSI 4 ETSI TR 101 913 V1.l.l (2001-05) 7.3.1 7.3.2 7.4 7.4.1 7.4.2 7.4.2.1 7.4.2.2 7.4.2.3 7.4.2.4 7.4.2.5 7.4.2.6 7.4.2.7 7.4.3 7.4.4 7.4
13、.5 7.4.6 7.4.7 7.5 7.6 H.248 . 33 BICC . 33 IETF specifications for IP telephony 33 Functional architecture . 34 Main protocols . 34 Real-time Transport Protocol (RTP) 34 Session Description Protocol (SDP) 35 Session Initiation Protocol (SIP) . 35 Domain Name System (DNS) and Lightweight Directory A
14、ccess Protocol (LDAP) . 35 Telephony Routing Information Protocol (TRIP) . 35 Naming and addressing 36 Supplementary services 36 Media Gateway Control Protocol (MEGACOP) 35 Stream Control Transport Protocol (SCTP) . 35 Security . 37 Quality of service . 37 Mobility . 37 ETSI TIPHON specifications .
15、38 Terminal specifications fiom TIA TR-41.3.4 38 8 Interworking of PISNs and IP networks via a gateway 38 8.1 Architecture 39 8.2 Signalling 39 Naming and addressing in PISNs 40 Naming and addressing in IP networks . 40 Naming and addressing interworking when H.323 used in the IP network . 40 Interw
16、orking and PNP numbers 40 Interworking and E.164 numbers 40 Implicit forms of number 41 Naming and addressing interworking when SIP used in the IP network . 41 H.323 supplementary services 41 SIP supplementary services 41 8.3 8.3.1 8.3.2 8.3.3 8.3.3.1 8.3.3.2 8.3.3.3 8.3.3.4 8.3.4 8.4 Supplementary
17、services . 41 8.4.1 8.4.2 8.5 Security . 41 8.6 Quality of service 42 8.7 Mobility 42 8.9 9 9.1 9.2 9.3 9.3.1 Architecture . 45 9.3.2 9.4 9.4.1 Architecture . 47 9.4.2 9.5 Solution 3 - enhanced QSIG in the IP network . 48 9.5.1 Architecture . 48 9.5.2 10 Connection of telephones to a PINX via an IP
18、network . 49 10.1 Architecture 49 10.2 Aspect requiring standardization work . 52 Naming and addressing 40 Other forms of alias in the IP network . 41 8.8 Network management 42 Aspects requiring fwther study or standardization work . 42 Interconnection of remote PISNs via an IP network . 43 Classifi
19、cation of scenarios for the interconnection of PISNs . 43 Solutions for the interconnection of remote PISNs via an IP network 44 Solution 1 - QSIG tunnelling over IP network transport layer protocol . 44 Aspects requiring fwther study or standardization work 46 Solution 2 - QSIG tunnelling over IP n
20、etwork session control protocol . 47 Aspects requiring fwther study or standardization work 48 Aspects requiring fwther study or standardization work 49 ETSI 5 ETSI TR 101 913 V1.l.l (2001-05) 11 Summary 52 Annex A: Overview and status of H.323 54 A . 1 Operation 54 A.2 Standardization status . 56 A
21、.2.1 ITU . 56 A.2.2 ETSI TIPHON 57 A.2.3 IMTC 57 Annex B: Overview and status of SIP 58 B . 1 Introduction 58 B.2 Architecture 58 B.3 Operation 59 B.4 Extensions to SIP and related work . 60 B.5 Standardization status . 60 Annex C: Overview of H.248/MEGACO protocol 61 Annex D: Architecture for Signa
22、lling Transport over IP-networks (SIGTRAN) 62 History . 65 ETSI 6 ETSI TR 101 913 V1.l.l (2001-05) Intellectual 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 publicly avai
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25、 essential to the present document. Foreword This Technical Report (TR) has been produced by ECMA on behalf of its members and those of the European Telecommunications Standards Institute (ETSI). Brief History The present document investigates the interoperability of Private Integrated Services Netw
26、orks (PISNs) and Internet Protocol (IP) networks within the context of Corporate telecommunication Networks (CN). The purpose is to identi6 possible scenarios for interoperation, problems that will have to be solved if particular scenarios are to be pursued fwther, and possible hture standardization
27、 activities in this area. It forms the foundation for fwther work in ECMA on this subject, including the production of Standards where found to be required. The present document is based upon the practical experience of ECMA member companies and the results of their active and continuous participati
28、on in the work of ISO/IEC JTC1, ITU-T, ETSI, IETF and other international and national standardization bodies. It represents a pragmatic and widely based consensus. The present document has been adopted by the ECMA General Assembly in September 2000. ETSI 7 ETSI TR 101 913 V1.l.l (2001-05) 1 Scope T
29、he present document is to investigate the interoperability of Private Integrated Services Networks (PISNs) and Internet Protocol (IP) networks, with a view to identifiing possible scenarios for interoperation, problems that will have to be solved if particular scenarios are to be pursued fwther, and
30、 possible hture standardization activities in this area. In particular, the following aspects of interoperability are investigated: - - the interworking of PISNs and IP networks via a gateway; the connection of PISN components via IP networks. For each of the above, aspects considered include archit
31、ecture, addressing (including use of IP addressing), services, protocols, security, quality of service and mobility. This is conducted within the context of leading standards for voice and multimedia communication over IP networks, including ITU-T Recommendation H.323 24, IETF Session Initiation Pro
32、tocol (SIP) and ITU-T Recommendation H.248 21. Possible hture standardization activities resulting from the present document can include work items relating to IP networks and work items relating to PISNs, as well as work items concerned specifically with interoperability. The dominant traffic in PI
33、SNs is voice, and therefore the present document focuses on interoperability considerations for voice traffic. However, many of the standards that support voice in an IP network are also applicable to multi-media traffic (e.g., voice, video and data). Although in many respects similar to voice, fax
34、traffic has slightly different requirements and is not explicitly considered in the present document. It could be the subject of fwther study. 2 Re fe re nces For the purposes of this Technical Report (TR) the following references apply: il ECMA- 133: “Private Integrated Services Network (PISN) - Re
35、ference Configurations for PISN Exchanges (PINX)“. ECMA- 143: “Private Integrated Services Network (PISN) - Circuit Mode Bearer Services - Inter-Exchange Signalling Procedures and Protocol (QSIG-BC)“. Pl 31 41 ECMA- 155: “Private Integrated Services Networks - Addressing“. ECMA- 163: “Private Integr
36、ated Services Network (PISN) - Specification, Functional Model and Information Flows - Name Identification Supplementary Services (NISD)“. ECMA- 164: “Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Name Identification Supplementary Services (QSIG-NA)“. ECMA- 165: “
37、Private Integrated Services Network (PISN) - Generic Functional Protocol for the Support of Supplementary Services - Inter-Exchange Signalling Procedures and Protocol 51 61 (QSIG-GF)“. ECMA- 174: “Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Diversion Supple
38、mentary Services (QSIG-CF)“. ECMA- 178: “Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Service (QSIG-CT)“. ECMA- 186: “Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Completion Supplementary Servi
39、ces (QSIG-CC)“. ECMA-242: “Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Message Waiting Indication Supplementary Service (QSIG-MWI)“. ECMA-300: “Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Single Step Call Transfer Supplement
40、ary Service (QSIG-SSCT)“. ECMA TW57: “Private Integrated Services Networks“. ETSI 8 ETSI TR 101 913 V1.l.l (2001-05) i131 i141 i151 i161 i171 i181 i191 i261 i271 i291 i3 01 i3 11 i321 i281 i331 i341 i351 i3 61 i3 81 i401 i411 i421 i371 i3 91 ECMA TW76: “Private Integrated Services Network (PISN) - A
41、rchitecture and Scenarios for Private Integrated Services Networking“. ETSI TS 101 3 13: “Telecommunications and Internet Protocol Harmonization over Networks (TIPHON); Network architecture and reference configurations; Phase II: Scenario 1 + Scenario 2“. ITU-T Recommendation G. 107: “The E-Model, a
42、 computational model for use in transmission planning“. ITU-T Recommendation G.7 1 1 : “Pulse Code Modulation (PCM) of voice frequencies“. ITU-T Recommendation G.723.1: “Dual rate speech coder for multimedia communications transmitting at 5,3 and 6,3 kbit/s“. ITU-T Recommendation H.225.0: “Call sign
43、alling protocols and media stream packetization for packet-based multimedia communication systems“. ITU-T Recommendation H.235: “Security and encryption for H-Series (H.323 and other H.245-based) multimedia terminals“. ITU-T Recommendation H.245: “Control protocol for multimedia communication“. ITU-
44、T Recommendation H.248: “Gateway control protocol“. ITU-T Recommendation H.261: “Video codec for audiovisual services at p x 64 kbit/s“. ITU-T Recommendation H.320: “Narrow-band visual telephone systems and terminal equipment“. ITU-T Recommendation H.323: “Packet Based Multimedia Communications Syst
45、ems“. ITU-T Recommendation H.450.1: “Generic functional protocol for the support of supplementary services in H.323“. ITU-T Recommendation H.450.2: “Call transfer supplementary service for H.323“. ITU-T Recommendation H.450.3: “Call diversion supplementary service for H.323“. ITU-T Recommendation H.
46、450.4: “Call hold supplementary service for H.323“. ITU-T Recommendation H.450.5: “Call park and call pickup supplementary services for H.323“. ITU-T Recommendation H.450.6: “Call waiting supplementary service for H.323“. ITU-T Recommendation H.450.7: “Message waiting indication supplementary servic
47、e for H.323“. ITU-T Recommendation H.450.8: “Name identification supplementary service for H.323“. ITU-T Recommendation H.450.9: “Call Completion Supplementary Services for H.323“. ITU-T Recommendation Q.921: “ISDN user-network interface - Data link layer specification“. ITU-T Recommendation Q.93 1:
48、 “ISDN user-network interface layer 3 specification for basic call control“. IETF RFC 79 1 : “Internet Protocol, version 4“. IETF RFC 1034: “Domain names - concepts and facilities“. IETF RFC 1035: “Domain names - implementation and specification“. IETF RFC 1889: “RTP: A Transport Protocol for Real-T
49、ime Applications“. IETF RFC 2205: “Resource Reservation Protocol (RSVP) - Version 1 Functional Specification“. IETF RFC 2246: “The TLS Protocol Version 1 .O“. IETF RFC 225 1: “Lightweight Directory Access Protocol (version 3)“. ETSI 9 ETSI TR 101 913 V1.l.l (2001-05) i43 1 i441 i451 i461 i481 i471 i491 i501 i511 IETF RFC 2326: “Real-time streaming protocol (RTSP)“. IETF RFC 2327: “SDP: Session Description Protocol“. IETF RFC 2401: “Security Architecture for the Internet Protocol“. IETF RFC 2402: “IP Authentication Header“. IETF RFC 2406: “IP Encapsulating Security Pay
