1、 Reference numberISO/IEC 14476-1:2002(E)ISO/IEC 2002Information technology Enhanced communications transport protocol: Specification of simplex multicast transport Technologies de linformation Protocole de transport de communication amlior: Spcifications pour le transport simplex multicast National
2、Standard of CanadaCAN/CSA-ISO/IEC 14476-1:04(ISO/IEC 14476-1:2002)International Standard ISO/IEC 14476-1:2002 (first edition, 2002-06-15) has been adopted without modification(IDT) as CSA Standard CAN/CSA-ISO/IEC 14476-1:04, which has been approved as a National Standard of Canadaby the Standards Co
3、uncil of Canada.ISBN 1-55397-327-5 January 2004The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspices this National Standard has been coordinating body of the National Standards system, produced, was chartered in 1919 and accredited by a federation of in
4、dependent, autonomousthe Standards Council of Canada to the National organizations working towards the furtherStandards system in 1973. It is a not-for-profit, development and improvement of voluntarynonstatutory, voluntary membership association standardization in the national interest.engaged in s
5、tandards development and certification The principal objects of the Council are to foster activities. and promote voluntary standardization as a means CSA standards reflect a national consensus of of advancing the national economy, benefiting theproducers and users including manufacturers, health, s
6、afety, and welfare of the public, assisting consumers, retailers, unions and professional and protecting the consumer, facilitating domestic organizations, and governmental agencies. The and international trade, and furthering internationalstandards are used widely by industry and commerce cooperati
7、on in the field of standards.and often adopted by municipal, provincial, and A National Standard of Canada is a standard whichfederal governments in their regulations, particularly in has been approved by the Standards Council ofthe fields of health, safety, building and construction, Canada and one
8、 which reflects a reasonableand the environment. agreement among the views of a number of capableIndividuals, companies, and associations across individuals whose collective interests provide to theCanada indicate their support for CSAs standards greatest practicable extent a balance ofdevelopment b
9、y volunteering their time and skills to representation of producers, users, consumers, andCSA Committee work and supporting the Associations others with relevant interests, as may be appropriateobjectives through sustaining memberships. The more to the subject in hand. It normally is a standardthan
10、7000 committee volunteers and the 2000 which is capable of making a significant and timelysustaining memberships together form CSAs total contribution to the national interest.membership from which its Directors are chosen. Approval of a standard as a National Standard ofSustaining memberships repre
11、sent a major source of Canada indicates that a standard conforms to theincome for CSAs standards development activities. criteria and procedures established by the StandardsThe Association offers certification and testing Council of Canada. Approval does not refer to theservices in support of and as
12、 an extension to its technical content of the standard; this remains thestandards development activities. To ensure the continuing responsibility of the accreditedintegrity of its certification process, the Association standards-development organization.regularly and continually audits and inspects
13、products Those who have a need to apply standards arethat bear the CSA Mark. encouraged to use National Standards of CanadaIn addition to its head office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA has regional branch offices in major to periodic review;
14、therefore, users are cautioned centres across Canada and inspection and testing to obtain the latest edition from the organizationagencies in eight countries. Since 1919, the preparing the standard.Association has developed the necessary expertise to The responsibility for approving National Standar
15、ds meet its corporate mission: CSA is an independent of Canada rests with theservice organization whose mission is to provide an Standards Council of Canadaopen and effective forum for activities facilitating the 270 Albert Street, Suite 200exchange of goods and services through the use of Ottawa, O
16、ntario, K1P 6N7standards, certification and related services to meet Canadanational and international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaCette Norme nationale du Canada est offerte en ang
17、lais et en franais.Although the intended primary application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 14
18、476-1:04 protocol: Specification of simplex multicast transportInformation technology Enhanced communications transportJanuary 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 14476-1:04Information technology Enhancedcommunications transport protocol: Specification of simplex multicasttransp
19、ortCSA PrefaceStandards development within the Information Technology sector is harmonized with internationalstandards development. Through the CSA Technical Committee on Information Technology (TCIT),Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onI
20、nformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO memberbody for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of theInternational Telecommunication Union (ITU), Canada participates in the International Telegraph andTelephon
21、e Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT under the jurisdiction of the StrategicSteering Committee on Information Technology and deemed acceptable for use in Canada. (Acommittee membership list is available on request from the CSA Project Manager.) Fr
22、om time to time,ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these documents for approvaland publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update orcontact a CSA Sales representative. This Standard has been formally approved, withou
23、t modification, bythe Technical Committee and has been approved as a National Standard of Canada by the StandardsCouncil of Canada.January 2004 Canadian Standards Association 2004All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of
24、the publisher. ISO/IEC material is reprinted with permission. Where the words “this International Standard” appear in thetext, they should be interpreted as “this National Standard of Canada”. Inquiries regarding this National Standard of Canada should be addressed to Canadian Standards Association
25、5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 416-747-4044www.csa.caReference numberISO/IEC 14476-1:2002(E)ISO/IEC 2002INTERNATIONAL STANDARD ISO/IEC14476-1First edition2002-06-15Information technology Enhanced communications transport protocol: Specification of s
26、implex multicast transport Technologies de linformation Protocole de transport de communication amlior: Spcifications pour le transport simplex multicast ISO/IEC 14476-1:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be
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30、orm or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 0
31、9 47 E-mail copyrightiso.ch Web www.iso.ch ii ISO/IEC 2002 All rights reservedISO/IEC 14476-1:2002(E) ISO/IEC 2002 All rights reserved iiiCONTENTS Page 1 Scope 1 2 Normative references 1 3 Definitions 1 3.1 Terms defined in ITU-T Rec. X.601 . 1 3.2 Terms defined in ITU-T Rec. X.605 | ISO/IEC 13252 1
32、 3.3 Terms defined in this Recommendation | International Standard 2 4 Abbreviations 2 4.1 Packet types. 2 4.2 Miscellaneous 3 5 Conventions 3 6 Overview 3 7 Protocol components 5 7.1 Nodes. 5 7.2 Control tree 6 7.3 Addressing. 7 7.4 Packets. 7 8 Protocol procedures 8 8.1 Operations before the conne
33、ction creation 8 8.2 Connection creation. 9 8.3 Data transmission 12 8.4 Error recovery 13 8.5 Connection pause and resume . 14 8.6 Late join. 14 8.7 Leave . 15 8.8 Tree membership maintenance 15 8.9 Connection termination . 16 9 Packet formats 16 9.1 Fixed header 17 9.2 Extension elements 18 9.3 Pa
34、cket structure . 21 10 Timers and variables. 24 10.1 Timers . 24 10.2 Operation variables 24 Annex A Network considerations . 25 Annex B Tree configuration mechanisms considered in IETF RMT WG 26 Bibliography 27 ISO/IEC 14476-1:2002(E) iv ISO/IEC 2002 All rights reservedForeword ISO (the Internation
35、al Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by
36、 the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of
37、 information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of the joint technical committee is to prepare International Standards. Draft Inte
38、rnational Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part o
39、f ISO/IEC 14476 may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 14476-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 6, Telecommunications and information exchang
40、e between systems, in collaboration with ITU-T. The identical text is published as ITU-T Rec. X.606. ISO/IEC 14476 consists of the following parts, under the general title Information technology Enhanced communications transport protocol: Part 1: Specification of simplex multicast transport Part 2:
41、Specification of QoS management for simplex multicast transport Part 3: Specification of duplex multicast transport Part 4: Specification of QoS management for duplex multicast transport Part 5: Specification of n-plex multicast transport Part 6: Specification of QoS management for n-plex multicast
42、transport Annexes A and B of this part of ISO/IEC 14476 are for information only. ISO/IEC 14476-1:2002(E) ISO/IEC 2002 All rights reserved vIntroduction This Recommendation | International Standard specifies the Enhanced Communications Transport Protocol (ECTP), which is a transport protocol designe
43、d to support Internet multicast applications running over multicast-capable networks. ECTP operates over IPv4/IPv6 networks that have the IP multicast forwarding capability with the help of IGMP and IP multicast routing protocols, as shown in Figure 1. ECTP could possibly be provisioned over UDP. Fi
44、gure 1 ECTP Model ECTP is designed to support tightly controlled multicast connections in simplex, duplex and N-plex applications. This Part of ECTP specifies the protocol mechanisms for reliability control in the simplex case. ECTP also provides QoS management functions for stable management of the
45、 QoS of the connection users. Such QoS management functionality can be achieved with QoS negotiation, monitoring and maintenance operations. The protocol procedures for QoS management of the simplex case will be defined in the simplex QoS management specification (ITU-T Rec. X.606.1 | ISO/IEC 14476-
46、2), which forms an integral part of this Recommendation | International Standard. Further specifications will define control procedures and associated QoS management functions for the duplex case (ITU-T Rec. X.607 | ISO/IEC 14476-3 and ITU-T Rec. X.607.1 | ISO/IEC 14476-4) and for the N-plex case (I
47、TU-T Rec. X.608 | ISO/IEC 14476-5 and ITU-T Rec. X.608.1 | ISO/IEC 14476-6). In ECTP, all prospective members are enrolled into a multicast group, before a connection or session is created. Those members define an enrolled group. Each receiver in the enrolled group is referred to as an enrolled rece
48、iver. In the enrolment process, each member will be authenticated. The group information, including group key and IP multicast addresses and port numbers, will be distributed to the enrolled members during the enrolment process. An ECTP connection is created for these enrolled group members. ECTP is
49、 targeted for tightly controlled multicast services. The sender is at the heart of multicast group communications. A single sender in the simplex multicast connection is assigned the role of the connection owner, designated as top owner (TO) in this Specification. The connection owner is responsible for overall connection management by governing connection creation and termination, connection pause and resumption, and join and leave operations. The sender triggers the connection creation process. Some or a
