ISO/IEC 24793-1:2010
(Main)Information technology — Mobile multicast communications: Framework — Part 1:
Information technology — Mobile multicast communications: Framework — Part 1:
ISO/IEC 24793 specifies mobile multicast communications (MMC), which can be used to support a variety of multimedia multicasting services in IP-based wireless mobile networks as well as wired fixed networks. MMC targets real-time, one-to-many multicast services and applications over mobile communications networks. This implies that MMC focuses on multicast services rather than broadcast services, and that only authenticated users could be allowed in the multicast session. MMC also considers the one-to-many multicast session wherein a single multicast sender is allowed in the session rather than many-to-many multicast services. In addition, MMC is targeted in the real-time multicast session rather than the reliable multicast session; the timely delivery of multicast data is considered a key factor. ISO/IEC 24793-1:2010 specifies the MMC framework as part of the MMC standard describing the framework and functional architecture of MMC. Based on this framework, the two protocols for MMC will be developed in two parts of the MMC project: protocol over native IP multicast networks and protocol over overlay multicast networks.
Technologies de l'information — Communications de diffusion groupée mobile: cadre de travail — Partie 1:
General Information
Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 24793-1
First edition
2010-12-15
Information technology — Mobile
multicast communications: Framework
Technologies de l'information — Communications de diffusion groupée
mobile: cadre de travail
Reference number
©
ISO/IEC 2010
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ii © ISO/IEC 2010 – All rights reserved
CONTENTS
Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Definitions . 1
4 Abbreviations . 2
5 Introduction . 2
5.1 Market trends . 2
5.2 Network environments . 3
5.3 Related Standards . 4
6 Design considerations . 7
6.1 Target applications and services . 7
6.2 Design principles . 7
6.3 Network models . 8
6.4 Functional requirements . 9
7 Functional architecture . 10
7.1 Functional entities . 10
7.2 Reference configuration of functional entities . 11
7.3 MMC functionality . 13
8 High-level information flows . 15
8.1 Service subscription and session announcement . 15
8.2 Multicast data transport . 16
8.3 Session join and leave . 16
8.4 Configuration of MMC agents . 17
8.5 Status monitoring . 17
8.6 Mobility support . 18
Annex A – Applicability of MMC protocols to OMA/BCAST . 20
Bibliography . 21
© ISO/IEC 2010 – All rights reserved iii
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
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 document 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 24793-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 6, Telecommunications and information exchange between systems, in collaboration with
ITU-T. The identical text is published as ITU-T Rec. X.604 (2010).
ISO/IEC 24793 consists of the following parts, under the general title Information technology — Mobile
multicast communications:
⎯ Part 1: Framework
⎯ Part 2: Protocol over native IP multicast networks
iv © ISO/IEC 2010 – All rights reserved
INTERNATIONAL STANDARD
RECOMMENDATION ITU-T
Information technology –
Mobile multicast communications: Framework
1 Scope
This Recommendation | International Standard describes the mobile multicast communications (MMC), which can be
used to support a variety of multimedia multicasting services in IP-based wireless mobile networks as well as wired
fixed networks. MMC targets real-time, one-to-many multicast services and applications over mobile communications
networks. This implies that MMC focuses on multicast services rather than broadcast services, and that only
authenticated users could be allowed in the multicast session. MMC also considers the one-to-many multicast session
wherein a single multicast sender is allowed in the session rather than many-to-many multicast services. In addition,
MMC is targeted in the real-time multicast session rather than the reliable multicast session; the timely delivery of
multicast data is considered a key factor.
This Recommendation | International Standard specifies the MMC framework as part of the MMC standard describing
the framework and functional architecture of MMC. Based on this framework, the two protocols for MMC will be
developed in two parts of the MMC project: protocol over native IP multicast networks and protocol over overlay
multicast networks.
2 Normative references
The following Recommendations and International Standards 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
Recommendation | 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 the ITU maintains a list of currently
valid ITU-T Recommendations.
– Recommendation ITU-T X.603 (2004) | ISO/IEC 16512-1:2005, Information technology – Relayed
multicast protocol: Framework.
– Recommendation ITU-T X.603.1 (2007) | ISO/IEC 16512-2:2008, Information technology – Relayed
multicast protocol: Specification for simplex group applications.
The following IETF standard track RFCs specify the multicast forwarding capability in IP multicast networks:
– IETF RFC 2236 (1997), Internet Group Management Protocol, Version 2, Proposed Standard.
– IETF RFC 3810 (2004), Multicast Listener Discovery Version 2 (MLDv2) for IPv6, Proposed Standard.
– IETF RFC 4601 (2006), Protocol Independent Multicast – Sparse Mode (PIM-SM): Protocol
Specification (Revised), Proposed Standard.
3 Definitions
This Recommendation | International Standard uses the terms defined in the relayed multicast protocol
(Rec. ITU-T X.603 | ISO/IEC 16512-1). The following terms are also used in this Recommendation | International
Standard:
3.1 multicast network: Multicast network refers to any of the networks wherein legacy IP multicasting schemes
are enabled with the help of multicast routing protocols, multicast forwarding capability of multicast routers in the
networks, link-layer multicasting of the points of attachment in the network, and multicast membership signalling in the
subnet such as IGMP/MLD. MMC services could be provisioned over the multicast network.
3.2 overlay multicast network: An overlay multicast network pertains to a network wherein legacy IP
multicasting schemes are not fully supported. In this network, multicast application data are delivered using unicast
transport such as TCP, UDP, or IP-in-IP tunnelling schemes. In particular, the unicast delivery of multicast data may be
done in backbone networks. In the overlay multicast network, IP multicast transport may be used in a portion of the
network. For example, as shown in the RMCP protocol (Rec. ITU-T X.603 | ISO/IEC 16512-1), subnet multicasting
may be used in the end subnets where the multicast sender or receiver is located. In the overlay multicast network,
Rec. ITU-T X.604 (03/2010) 1
multicast data may be delivered using the unicast relay of multicast agents and subnet multicasting capability. MMC
services could be provisioned over the overlay multicast network.
4 Abbreviations
For the purposes of this Recommendation | International Standard, the following abbreviations apply:
AAA Authentication, Authorization, and Accounting
AS Authentication Server
BCMCS Broadcast Multicast Services
BWA Broadband Wireless Access
ECTP Enhanced Communications Transport Protocol
FMC Fixed Mobile Convergence
IGMP Internet Group Management Protocol
IP Internet Protocol
IPTV IP-based TV
MA Multicast Agent
MBMS Multimedia Broadcast Multicast Services
MCS Multicast Contents Server
MLD Multicast Listener Discovery
MMC Mobile Multicast Communications
MMCF MMC Framework
MN Mobile Node
MS Mobile Station
NGN Next Generation Networks
RMCP Relayed Multicast Protocol
SDO Standards Development Organization
SM Session Manager
WLAN Wireless Local Area Network
5 Introduction
This Recommendation | International Standard deals with mobile multicast communications (MMC). MMC is targeted
to enable and support a variety of multimedia multicast applications and services over the wireless/mobile networks as
well as the wired/fixed networks.
This Recommendation | International Standard describes the MMC framework (MMCF). Based on this framework, the
two protocols required for MMC will be developed. This clause will first describe the rationale for MMC from the
perspective of market trends and evolving network environments. In addition, some related works that have been made
in other SDOs will be reviewed.
5.1 Market trends
From the market perspective, the work on MMC is driven by the following observations:
a) Growth of IP-based multimedia broadcast/multicast services markets
In telecommunications markets, there is a crucial need to provide multimedia multicasting and
broadcasting services all over the world. With the help of broadband networks, efficient multimedia
platforms including audio/video codecs, and IP-based network transport and application technologies, the
2 Rec. ITU-T X.604 (03/2010)
markets for IP-based multimedia broadcasting and multicas
...
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