ISO/IEC 16512-2:2016
(Main)Information technology — Relayed multicast protocol: Specification for simplex group applications — Part 2:
Information technology — Relayed multicast protocol: Specification for simplex group applications — Part 2:
ISO/IEC 16512-2:2016 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 transport 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 construct 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 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.
Technologies de l'information — Protocole de multidiffusion relayé: Spécification relative aux applications de groupe simplex — Partie 2:
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INTERNATIONAL ISO/IEC
STANDARD 16512-2
Third edition
2016-04-01
Information technology — Relayed
multicast protocol: Specification for
simplex group applications
Technologies de l'information — Protocole de multidiffusion relayé:
Spécification relative aux applications de groupe simplex
Reference number
©
ISO/IEC 2016
© ISO/IEC 2016
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ii © ISO/IEC 2016 – All rights reserved
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 the 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-governmental, 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/IEC 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 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 patent 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 information about ISO's 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 prepared 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
Part 2: Specification for simplex group applications
© ISO/IEC 2016 – All rights reserved ii-1
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 . 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 manager's operation . 13
7.2 Multicast agent's operation . 16
8 Protocol operation for secure RMCP-2 . 31
8.1 Session manager's operation . 31
8.2 Multicast agent's 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 Identifications 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 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 Supporting 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 acceptance rule . 103
C.4 Parent decision rule . 103
C.5 Tree improvement rule . 104
C.6 PMA's expulsion rule . 104
Annex D – Real-time data delivery scheme . 105
Rec. ITU-T X.603.1 (08/2012) iii
Page
D.1 Overview . 105
D.2 Data delivery scheme using IP-IP tunnel mechanism . 105
D.3 Data delivery 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-2 API functions . 114
Annex G – RMCP-2 service scenario . 117
Annex H – Bibliography . 119
iv Rec. ITU-T X.603.1 (08/2012)
Introduction
This Recommendation | International Standard specifies the relayed multicast protocol part 2 (RMCP-2), which is an
application-layer relayed multicast 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 application services.
Rec. ITU-T X.603.1 (08/2012) v
INTERNATIONAL STANDARD
ITU-T RECOMMENDATION
Information technology – Relayed multicast protocol:
Specification for simplex group applications
1 Scope
This Recommendation | International 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 transport
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
...
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