1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T J.165TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2003) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS IPCablecom IPCablecom Internet signalling transport protocol (ISTP) ITU-T Recommendation J
2、.165 ITU-T J-SERIES RECOMMENDATIONS CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendations J.1J.9 General specifications for analogue sound-programme transmission J.10J.19 Performance characteristics of analogue sound-programme circuits J.
3、20J.29 Equipment and lines used for analogue sound-programme circuits J.30J.39 Digital encoders for analogue sound-programme signals J.40J.49 Digital transmission of sound-programme signals J.50J.59 Circuits for analogue television transmission J.60J.69 Analogue television transmission over metallic
4、 lines and interconnection with radio-relay links J.70J.79 Digital transmission of television signals J.80J.89 Ancillary digital services for television transmission J.90J.99 Operational requirements and methods for television transmission J.100J.109 Interactive systems for digital television distri
5、bution J.110J.129 Transport of MPEG-2 signals on packetized networks J.130J.139 Measurement of the quality of service J.140J.149 Digital television distribution through local subscriber networks J.150J.159 IPCablecom J.160J.179 Miscellaneous J.180J.199 Application for Interactive Digital Television
6、J.200J.209 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. J.165 (05/2003) i ITU-T Recommendation J.165 IPCablecom Internet signalling transport protocol (ISTP) Summary This Recommendation describes the Internet Signalling Transport Protocol (ISTP) to implement Sig
7、nalling System No. 7 signalling interconnection to a distributed IPCablecom PSTN gateway architecture. An appendix to this Recommendation defines regional and country-specific variations. Source ITU-T Recommendation J.165 was approved by ITU-T Study Group 9 (2001-2004) under the ITU-T Recommendation
8、 A.8 procedure on 29 May 2003. ii ITU-T Rec. J.165 (05/2003) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsibl
9、e for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T
10、study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative ba
11、sis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandator
12、y provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use
13、 of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no
14、position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, p
15、rotected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2003 All rights reserved. No part of this publication may be re
16、produced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. J.165 (05/2003) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Normative references 1 2.2 Informative references 2 3 Terms and abbreviations. 2 3.1 Terms 2 3.2 Abbreviations . 2 4 Signalling protocols 3 5 Ove
17、rview and background motivation 4 5.1 Service goals. 4 5.2 IPCablecom reference architecture. 5 5.3 Introduction to ISTP. 6 5.4 Specification goals 8 5.5 Specification interfaces 8 6 Architecture 8 6.1 IPCablecom to PSTN . 8 6.2 Signalling architecture network model. 9 6.3 Distribution model 11 6.4
18、Guaranteed performance 12 6.5 Protocol stack . 13 7 Functional areas 14 7.1 Mapping relationships 14 7.2 Message distribution. 16 7.3 Dynamic mapping 17 7.4 Relationships 17 7.5 Initialization 18 7.6 Recovery. 18 7.7 Dynamic provisioning 19 7.8 Administration 20 7.9 Security. 20 7.10 Maintenance . 2
19、0 7.11 Measurement 20 7.12 Alarms 20 7.13 Congestion 20 7.14 Management of lower layers 21 iv ITU-T Rec. J.165 (05/2003) Page 8 Protocol. 21 8.1 General requirements 21 8.2 Procedures 22 8.3 Failure detection and handling . 29 8.4 Message format . 32 8.5 Messages. 38 9 SCTP and TCP usage recommendat
20、ions 44 9.1 SCTP usage recommendations. 44 9.2 TCP usage recommendations . 45 10 ISTP message flows and timer definitions . 46 10.1 Timers. 46 10.2 MGC requests ISUP service procedure 47 10.3 MGC terminates ISUP service procedure 48 10.4 Residential CA requests TCAP service procedure. 49 10.5 Reside
21、ntial CA terminates TCAP service procedure . 50 10.6 A typical origination communication. 51 10.7 Freephone service. 52 10.8 MGC failover procedure. 53 10.9 MGC switchover procedure . 54 Appendix I Bibliography 55 I.1 European. 55 I.2 North American 55 ITU-T Rec. J.165 (05/2003) 1 ITU-T Recommendati
22、on J.165 IPCablecom Internet signalling transport protocol (ISTP) 1 Scope This recommendation addresses the protocol to implement ITU SS7 used for signalling interconnection in a distributed IPCablecom PSTN Gateway architecture. Specifically, it defines the messages and procedures for transporting S
23、S7 ISUP, and TCAP messages as defined by ITU specifications between the IPCablecom control functions (Media Gateway Controller and Call Management Server) and the SS7 Signalling Gateway. Areas beyond the scope of this Recommendation include: address layer management (SNMP), security, and measurement
24、s; these are covered in other IPCablecom Recommendations; implementation and vendor dependant issues, such as performance, functional distribution, network configuration, etc.; details about CMS, MGC, and other media communication applications. 2 References 2.1 Normative references The following ITU
25、-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revisions; users of this Recommendati
26、on are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is published regularly. The reference to a document within this Recommendation does not give it
27、, as a stand-alone document, the status of a Recommendation. ITU-T Recommendation Q.704 (1996), Signalling network functions and messages. ITU-T Recommendation Q.711 (2001), Functional description of the signalling connection control part. ITU-T Recommendation Q.712 (1996), Definition and function o
28、f signalling connection control part messages. ITU-T Recommendation Q.713 (2001), Signalling connection control part formats and codes. ITU-T Recommendation Q.714 (2001), Signalling connection control part procedures. ITU-T Recommendation Q.761 (1999), Signalling System No. 7 ISDN User Part function
29、al description. ITU-T Recommendation Q.762 (1999), Signalling System No. 7 ISDN User Part general functions of messages and signals. ITU-T Recommendation Q.763 (1999), Signalling System No. 7 ISDN User Part formats and codes. ITU-T Recommendation Q.764 (1999), Signalling System No. 7 ISDN User Part
30、signalling procedures. ITU-T Recommendation Q.771 (1997), Functional description of transaction capabilities. 2 ITU-T Rec. J.165 (05/2003) ITU-T Recommendation Q.772 (1997), Transaction capabilities information element definitions. ITU-T Recommendation Q.773 (1997), Transaction capabilities formats
31、and encoding. ITU-T Recommendation Q.774 (1997), Transaction capabilities procedures. ITU-T Recommendation Q.775 (1997), Guidelines for using transaction capabilities. 2.2 Informative references ITU-T Recommendation J.112 (1998), Transmission systems for interactive television services. ITU-T Recomm
32、endation J.160 (2002), Architectural framework for the delivery of time-critical services over cable television networks using cable modems. IETF RFC 791 (1981), Internet Protocol. IETF RFC 821 (1982), Simple Mail Transport Protocol. IETF RFC 2960 (2000), Stream Control Transport Protocol. 3 Terms a
33、nd abbreviations 3.1 Terms This Recommendation defines the following terms: 3.1.1 access node: As used in this Recommendation, an Access Node is a layer two termination device that terminates the network end of the J.112 connection. It is technology specific. In Annex A/J.112 it is called the INA wh
34、ile in Annex B/J.112 it is the CMTS. 3.1.2 cable modem: A cable modem is a layer two termination device that terminates the customer end of the J.112 connection. 3.1.3 gateway: Devices bridging between the IPCablecom IP Voice Communication world and the PSTN. Examples are the Media Gateway which pro
35、vides the bearer circuit interfaces to the PSTN and transcodes the media stream, and the Signalling Gateway which sends and receives circuit switched network signalling to the edge of the IPCablecom network. 3.1.4 IPCablecom: An ITU-T project that includes an architecture and a series of Recommendat
36、ions that enable the delivery of real time services over the cable television networks using cable modems. 3.1.5 signalling gateway (SG): An SG is a signalling agent that receives/sends SCN native signalling at the edge of the IP network. In particular the SS7 SG function translates variants ISUP an
37、d TCAP in an SS7-Internet Gateway to a common version of ISUP and TCAP. 3.2 Abbreviations This Recommendation uses the following abbreviations: AN Access Node ANS Announcement Server ATM Asynchronous Transfer Mode CA Call Agent CIC Circuit Identification Code CID Circuit ID ITU-T Rec. J.165 (05/2003
38、) 3 CM Cable Modem CMS Call Management Server DNS Domain Name Service DPC Destination Point Code HFC Hybrid Fibre/Coaxial cable IP Internet Protocol ISTP Internet Signalling Transport Protocol ISUP ISDN User Part LAN Local Area Network LNP Local Number Portability MAC Media Access Control MG Media G
39、ateway MGC Media Gateway Controller MTA Media Terminal Adapter MTP Message Transfer Part PHY Physical Layer PSTN Public Switched Telephone Network QoS Quality of Service RTP Real Time Protocol SCCP Signalling Connection Control Part SCP Service Control Point SCTP Stream Control Transmission Protocol
40、 SG Signalling Gateway SIP Session Initiation Protocol SLS Signalling Link Selection SS7 Signalling System No. 7 SSP Signal Switching Point TCAP Transaction Capabilities Application Part TCAP Transaction Capabilities Application Protocol TCP Transmission Control Protocol UDP User Datagram Protocol W
41、AN Wide Area Network 4 Signalling protocols The signalling protocols used for interconnection in a distributed IPCablecom PSTN gateway architecture should be designed to support ITU-T Signalling System No. 7 (SS7). NOTE It is recognized that there are regional and country specific variants of ITU-T
42、SS7 in use today. If a Signalling Gateway interfaces with such non-ITU-T networks, the regional or country specific variant should 4 ITU-T Rec. J.165 (05/2003) be used in place of the ITU-T Recommendation. This Recommendation defines non-normative ISTP profiles which comply with conforming implement
43、ation of SS7 as implemented by regional carriers. 5 Overview and background motivation 5.1 Service goals Cable operators are interested in deploying high-speed data and multimedia communications services on cable television systems. It is necessary to have a series of interface Recommendations that
44、will permit the early definition, design, development, and deployment of packetized data-based services over cable systems on a uniform, consistent, open, non-proprietary, multi-vendor interoperable basis. The intended system enables Internet Protocol (IP)-based voice communications, video, and data
45、 services to be provided to the customer over an all-coaxial or hybrid-fibre/coax (HFC) cable access network by utilizing ITU-T Rec. J.112 as the basic foundation for data transport. This is shown in simplified form in Figure 1. J.165_F01ANNetwork sideinterfaceCablenetworkCM Customer premisesequipme
46、nt interfaceCablemodem(CM)Wide-areanetworkAccess nodeANTransparent IP traffic through the systemCustomer premisesequipmentFigure 1/J.165 Transparent IP traffic through the data-over-cable system The transmission path over the cable system is realized at the headend by an Access Node and at each cust
47、omer location by a CM. The intent is for operators to transfer IP traffic transparently between these interfaces, thereby providing the basic transport mechanism for data-based multimedia services. When providing voice and other multimedia services over the J.112 access network many issues need to b
48、e addressed for incoming and outgoing communications. These issues include but are not limited to: voice or other media content conversion; call control signalling; quality of service control; call control signalling interoperability with the existing public network; media interfaces to the existing
49、 public network; data transactions to public databases; routing mechanisms; billing; operations and maintenance; security; privacy. ITU-T Rec. J.165 (05/2003) 5 The IPCablecom project is addressing these issues through the development and publication of reference architecture and a series of corresponding interface specifications. This Recommendation, the IPCablecom Internet Signalling Transport Protocol (ISTP), addresses the issue of call control signalling interoperability with the existing
