1、 Reference number ISO/IEC 24793-1:2010(E) ISO/IEC 2010INTERNATIONAL STANDARD ISO/IEC 24793-1 First edition 2010-12-15 Information technology Mobile multicast communications: Framework Technologies de linformation Communications de diffusion groupe mobile: cadre de travail ISO/IEC 24793-1:2010(E) PDF
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5、 PROTECTED DOCUMENT ISO/IEC 2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below
6、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 by ISO in 2011 Published in Switzerland ii ISO/IEC 2010 All rights reservedISO/IEC 24793-1:2010(E
7、) ISO/IEC 2010 All rights reserved iiiCONTENTS Page 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 princip
8、les . 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 Multica
9、st 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 . iv Foreword .ISO/IEC 24793-1:2010(E) iv ISO/IEC 2010 All rights reservedForeword ISO (
10、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
11、 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.
12、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 Standa
13、rds. 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
14、 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 excha
15、nge 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 net
16、works ISO/IEC 24793-1:2010 (E) Rec. ITU-T X.604 (03/2010) 1 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 sup
17、port 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 broadca
18、st 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 multic
19、ast 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 fr
20、amework, 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
21、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 encourage
22、d 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 IT
23、U-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. Th
24、e 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 RF
25、C 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 a
26、lso 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
27、-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 multic
28、asting 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 mul
29、ticast 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, ISO/IEC 24793-1:2010 (E)
30、2 Rec. ITU-T X.604 (03/2010) 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 fol
31、lowing 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 Pro
32、tocol 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 S
33、DO 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 ov
34、er 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 perspect
35、ive 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 ser
36、vices 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 techn
37、ologies, the ISO/IEC 24793-1:2010 (E) Rec. ITU-T X.604 (03/2010) 3 markets for IP-based multimedia broadcasting and multicasting services are expected to grow in next generation communications networks. Examples of these multimedia multicast/broadcast services include Internet TV (IPTV), remote educ
38、ation, broadcasting of special live events, etc. b) Increasing needs of multimedia broadcast/multicast services over wireless mobile networks The recent trend in the mobile communications industry reflects the increasing demands of multimedia multicast/broadcast applications and services over wirele
39、ss/mobile networks. In fact, IP-based multimedia broadcasting/multicasting services will be some of the primary killer applications from the perspective of mobile service providers. Examples of these mobile multicast applications/services include mobile IPTV, mobile commerce (m-commerce), and digita
40、l multimedia broadcasting (DMB) using mobile devices such as cellular phone, PDA, handheld PCs, etc. These mobile multicasting services are expected to be provisioned through a variety of wireless access networks such as cdma2000, W-CDMA, wireless LAN (WLAN) based on IEEE 802.11, and broadband wirel
41、ess access (BWA) based on IEEE 802.16. Most of the mobile service providers are expected to provide IP-based multimedia multicasting services over these various wireless networks. c) MBMS and BCMCS standardizations in 3GPP and 3GPP2 Given the demand for mobile multicasting, 3GPP and 3GPP2 are workin
42、g on standardization to develop the relevant protocols or schemes. In 3GPP, the “Multimedia Broadcast and Multicast Services (MBMS)“ is being developed to support IP-based multimedia multicasting services in its own systems. On the other hand, 3GPP2 started to come up with standardization works on t
43、he “Broadcast thus ensuring that identical multimedia multicast/broadcast services could be provided to users regardless of the access network where the user is connected. With this trend of fixed mobile convergence (FMC), there is a crucial need to provide multimedia multicasting services/applicati
44、ons over wireless/mobile networks as well as wired/fixed communications networks. Figure 1 illustrates the network environment to be considered in the MMC. Figure 1 Network environments in MMC As shown in Figure 1, the NGN environment is featured in the “IP-based core network“ and a variety of “hete
45、rogeneous access networks“. In this scenario (Figure 1), the network operator (or service provider) will provide various multimedia multicasting services/applications for users over the IP-based core network. Each (mobile) user will benefit from such comprehensive services through the various access
46、 networks. Each access network could be a fixed/wired network such as the conventional PSTN, ISDN, and Internet or a mobile/wireless network such as WLAN, BWA, and 3G cellular networks. Under the FMC feature, users shall benefit from identical multimedia multicasting services regardless of the speci
47、fic access network where they are connected. ISO/IEC 24793-1:2010 (E) 4 Rec. ITU-T X.604 (03/2010) Note that the user may move around across a variety of access networks in the NGN environment. Accordingly, the issue of mobility support for mobile users needs to be addressed from the MMC perspective
48、, i.e., seamless mobility (specifically handover) shall be supported even when mobile users move across those heterogeneous networks. The mobility issue on MMC shall deal with how to support seamless multicast services against the movement of users (terminals). These observations suggest the need fo
49、r some schemes or protocols in providing seamless mobile multicasting services under FMC and mobility environments of NGN. Such schemes or protocols shall be commonly applied for a variety of heterogeneous wireless and wired access networks regardless of the movement of users. 5.3 Related Standards This Recommendation | International Standard seeks to design the framework of MMC. MMCF shall be designed based on existing works that have been made to date in SDOs. Thus, this clause describes the relevant works in IETF, ITU-T, JTC 1, and 3
