1、BSI Standards Publication BS ISO/IEC 16512-2:2016 Information technology Relayed multicast protocol: Specification for simplex group applicationsBS ISO/IEC 16512-2:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO/IEC 16512-2:2016. The UK participation in
2、its preparation was entrusted to Technical Committee ICT/-/1, Information systems co-ordination. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are respo
3、nsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 90434 9 ICS 35.100.70 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the St
4、andards Policy and Strategy Committee on 30 April 2016. Amendments/corrigenda issued since publication Date T e x t a f f e c t e dBS ISO/IEC 16512-2:2016Reference number ISO/IEC 16512-2:2016(E) ISO/IEC 2016INTERNATIONAL STANDARD ISO/IEC 16512-2 Third edition 2016-04-01 Information technology Relaye
5、d multicast protocol: Specification for simplex group applications Technologies de linformation Protocole de multidiffusion relay: Spcification relative aux applications de groupe simplex BS ISO/IEC 16512-2:2016 ISO/IEC 16512-2:2016(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2016 All rights reserved. U
6、nless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at th
7、e 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 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2016 All rights reservedBS ISO/IEC 16512-2:2016 ISO/IEC
8、 16512-2:2016(E) ISO/IEC 2016 All rights reserved ii-1 Foreword ISO (the International 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 th
9、e development of International Standards through technical committees established by 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-go
10、vernmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/I
11、EC Directives, Part 1. In particular the different approval criteria needed for the different types of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that
12、 some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pa
13、tent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as in
14、formation about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information. This third edition cancels and replaces the second edition (ISO/IEC 16512-2:2011), which has been technically revised. ISO/IEC 16512-2 was prepare
15、d by Joint Technical Committee ISO/IEC JTC 1, Information technology, in collaboration with ITU-T. The identical text is published as ITU-T X.603.1 (03/2012). ISO/IEC 16512 consists of the following parts, under the general title Information technology Relayed multicast protocol: Part 1: Framework P
16、art 2: Specification for simplex group applications BS ISO/IEC 16512-2:2016BS ISO/IEC 16512-2:2016Rec. ITU-T X.603.1 (08/2012) iii CONTENTS Page 1 Scope 1 2 References 1 2.1 Identical Recommendations | International Standards 1 2.2 Additional references 1 3 Definitions 2 3.1 Terms defined elsewhere
17、. 2 3.2 Terms defined in this Recommendation 2 4 Abbreviations and acronyms 3 5 Conventions 4 6 Overview 5 6.1 Overview of basic RMCP-2 5 6.2 Overview of secure RMCP-2 9 6.3 Types of RMCP-2 messages . 12 7 Protocol operation for basic RMCP-2 13 7.1 Session managers operation 13 7.2 Multicast agents
18、operation 16 8 Protocol operation for secure RMCP-2 31 8.1 Session managers operation 31 8.2 Multicast agents operation 35 9 RMCP-2 message format . 40 9.1 Common format of RMCP-2 message 41 9.2 Control data format . 41 9.3 RMCP-2 messages 42 9.4 RMCP-2 controls 64 10 Parameters 84 10.1 Identificati
19、ons used in RMCP-2 85 10.2 Code values used in RMCP-2 . 85 10.3 Code values for sub-control types . 87 10.4 Code values used in control 89 10.5 Code values related to the security policy for a secure RMCP-2 90 10.6 Timer related parameters . 91 10.7 Data profile used in RMCP-2 93 Annex A Membership
20、authentication mechanism 95 A.1 Overview . 95 A.2 Authentication procedure 95 Annex B Method for sharing session information among multiple SM domains . 97 B.1 Overview . 97 B.2 Session information sharing between SMs 97 B.3 Supporting session subscription in RMCP-2 between multiple SMs 98 B.4 Suppo
21、rting a session leave in RMCP-2 between multiple SMs 99 B.5 Other operations of the RMA in RMCP-2 between multiple SMs 100 B.6 RMCP-2 messages for sharing session information between SMs . 100 Annex C Tree configuration rules. 102 C.1 Bootstrapping rule . 102 C.2 HMA selection rule . 102 C.3 CMA acc
22、eptance rule 103 C.4 Parent decision rule . 103 C.5 Tree improvement rule 104 C.6 PMAs expulsion rule 104 Annex D Real-time data delivery scheme 105 BS ISO/IEC 16512-2:2016iv Rec. ITU-T X.603.1 (08/2012) Page D.1 Overview . 105 D.2 Data delivery scheme using IP-IP tunnel mechanism . 105 D.3 Data del
23、ivery scheme using a non-encapsulation scheme . 106 Annex E Reliable data delivery scheme . 108 E.1 Overview . 108 E.2 Issues for a reliable data delivery scheme . 108 E.3 Operation . 109 E.4 Service data unit (SDU) format . 111 E.5 Data profile 111 Annex F RMCP-2 API 113 F.1 Overview . 113 F.2 RMCP
24、-2 API functions . 114 Annex G RMCP-2 service scenario 117 Annex H Bibliography 119 BS ISO/IEC 16512-2:2016Rec. ITU-T X.603.1 (08/2012) v Introduction This Recommendation | International Standard specifies the relayed multicast protocol part 2 (RMCP-2), which is an application-layer relayed multicas
25、t protocol for simplex group applications. RMCP-2 can construct an optimized and robust one-to-many relayed multicast delivery path over IP-based networks. Along the relayed multicast delivery path, several types of data delivery channels can be constructed according to the requirements of the appli
26、cation services. BS ISO/IEC 16512-2:2016BS ISO/IEC 16512-2:2016 ISO/IEC 16512-2:2016 (E) Rec. ITU-T X.603.1 (08/2012) 1 INTERNATIONAL STANDARD ITU-T RECOMMENDATION Information technology Relayed multicast protocol: Specification for simplex group applications 1 Scope This Recommendation | Internatio
27、nal Standard specifies the relayed multicast protocol part 2 (RMCP-2), an application-layer protocol that constructs a multicast tree for data delivery from one sender to multiple receivers over an IP-based network, where IP multicast is not fully deployed. RMCP-2 defines relayed multicast data tran
28、sport capabilities over IP-based networks for simplex group applications. This Recommendation | International Standard specifies the following: a) descriptions of the entities, control and data delivery models of RMCP-2; b) description of the functions and procedures of multicast agents (MAs) to con
29、struct a one-to-many relayed data path and to relay data for simplex communication; c) description of the security features of the basic RMCP-2; and d) definitions of messages and parameters of the basic RMCP-2 and secure RMCP-2. Annex A defines a membership authentication procedure for use with the
30、 secure RMCP-2. Annex B provides a method for sharing information among session managers (SMs) when multiple SMs are used. Annexes C-G provide informative material related to RMCP-2. Annex H contains an informative bibliography. 2 References The following Recommendations and International Standards
31、contain provisions which, through reference in this text, constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommend
32、ation | International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of th
33、e ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations | International Standards Recommendation ITU-T X.603 (2012) | ISO/IEC 16512-1:2012, Information technology Relayed multicast protocol: Framework. 2.2 Additional references ISO/IEC 9797-2:2011, Information
34、technology Security techniques Message Authentication Codes (MACs) Part 2: Mechanisms using a dedicated hash-function. ISO/IEC 9798-3:1998, Information technology Security techniques Entity authentication Part 3: Mechanisms using digital signature techniques. ISO/IEC 18033-2:2006, Information techno
35、logy Security techniques Encryption algorithms Part 2: Asymmetric ciphers. ISO/IEC 18033-3:2010, Information technology Security techniques Encryption algorithms Part 3: Block ciphers. ISO/IEC 18033-4:2011, Information technology Security techniques Encryption algorithms Part 4: Stream ciphers. IETF
36、 RFC 768 (1980), User Datagram Protocol. IETF RFC 793 (1981), Transmission Control Protocol. IETF RFC 2003 (1996), IP Encapsulation within IP. IETF RFC 3830 (2004), MIKEY: Multimedia Internet KEYing. IETF RFC 4279 (2005), Pre-Shared Key Ciphersuites for Transport Layer Security (TLS). IETF RFC 4535
37、(2006), GSAKMP: Group Secure Association Key Management Protocol. BS ISO/IEC 16512-2:2016 ISO/IEC 16512-2:2016 (E) 2 Rec. ITU-T X.603.1 (08/2012) IETF RFC 4960 (2007), Stream Control Transmission Protocol. IETF RFC 5246 (2008), The Transport Layer Security (TLS) Protocol Version 1.2. IETF RFC 6066 (
38、2011), Transport Layer Security (TLS) Extensions: Extension Definitions. 3 Definitions For the purposes of this Recommendation | International Standard, the following definitions apply. 3.1 Terms defined elsewhere The following terms are defined in Rec. ITU-T X.603 | ISO/IEC 16512-1: 3.1.1 IP multic
39、ast: Realizes a multicast scheme in an IP network with the help of multicast-enabled IP routers. 3.1.2 multicast: A data delivery scheme where the same data unit is transmitted from a single source to multiple destinations in a single invocation of service. 3.1.3 multicast agent (MA): An intermediat
40、e node which relays group application data. 3.1.4 relayed multicast protocol (RMCP): A protocol to realize the relayed multicast scheme using end hosts. 3.1.5 simplex: Wherein only one sender is send-only and all others are receive-only. 3.1.6 session manager (SM): A relayed multicast protocol (RMCP
41、) entity that is responsible for the overall RMCP operations. 3.2 Terms defined in this Recommendation This Recommendation | International Standard defines the following terms: 3.2.1 basic RMCP-2: The relayed multicast protocol for simplex group applications, defined in clause 7. 3.2.2 candidate HMA
42、: The MA that is able to assume the role of an HMA, when the original HMA leaves or is terminated. In the basic RMCP-2, the MA indicates the RMA while it indicates the DMA in a secure RMCP-2. 3.2.3 child multicast agent (CMA): The next downstream MA in the RMCP-2 data delivery path. 3.2.4 closed gro
43、up: A member multicast (MM) group in which all the RMAs have been allocated a service user identifier from the content provider before subscribing to the secure RMCP-2 session. 3.2.5 dedicated multicast agent (DMA): An intermediate MA pre-deployed as a trust server by the session manager (SM) in an
44、RMCP-2 session. 3.2.6 group attribute (GP_ATTRIBUTE): An attribute that defines whether or not the content provider controls the admission of RMAs to the secure RMCP-2 session. 3.2.7 head multicast agent (HMA): A representative of the MA inside a local network where the multicast is enabled. 3.2.8 m
45、ember multicast region (MM region): A management zone defined by the use of one or more group keys Kg. 3.2.9 member multicast group (MM group): 1) (in unicast network) a group consisting of one DMA and multiple RMAs sharing the same group key Kg. 2) (in multicast network) a group consisting of one H
46、MA, multiple RMAs together with one or more candidate HMAs sharing the same group key Kg. 3.2.10 multicast agent ID (MAID): A 64-bit value that identifies the MA. MAID consists of the local IP address, port number and serial number. 3.2.11 open group: An MM group in which none of the RMAs require a
47、service user identifier before subscribing to the secure RMCP-2 session. 3.2.12 parent multicast agent (PMA): The next upstream MA in the RMCP-2 data delivery path. 3.2.13 pseudo-HB message: An HB message that indicates a fault in the delivery path of the RMCP-2 tree. The originator of a pseudo-HB m
48、essage is the MA that discovers this fault. BS ISO/IEC 16512-2:2016 ISO/IEC 16512-2:2016 (E) Rec. ITU-T X.603.1 (08/2012) 3 3.2.14 receiver multicast agent (RMA): The MA attached to the receiving application in the same system or local network. 3.2.15 regular HB message: An HB message that is relaye
49、d without interruption along the path of the RMCP-2 tree from the SMA to the receiver of the message. The originator of a regular HB message is the SMA. 3.2.16 relayed multicast: A multicast data delivery scheme that can be used in unicast environments, which is based on the intermediate nodes to relay multicast data from the media server to media players over a logically configured network. 3.2.17 relayed multicast region (RM region): A management zone defined by the use of
