1、 International Telecommunication Union ITU-T Y.2810TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2012) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Generalized mobility Mobility management framework for IP multicas
2、t communications in next generation networks Recommendation ITU-T Y.2810 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middleware Y.200Y.299 Netw
3、ork aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1199 Architecture,
4、access, network capabilities and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 N
5、EXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Numbering, nam
6、ing and addressing Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Smart ubiquitous networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899Carrier grade open environment Y.2900Y.2999 Future networks Y.3000Y.3099 For further
7、details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.2810 (03/2012) i Recommendation ITU-T Y.2810 Mobility management framework for IP multicast communications in next generation networks Summary Recommendation ITU-T Y.2810 describes the mobility management framework for Internet
8、 Protocol (IP) multicast communications in next generation networks (NGNs). Specifically, this Recommendation pursues network-based mobile multicast support wherein multicast is handled without the involvement of the user equipment during handover. This Recommendation identifies the design considera
9、tions, functional architecture, and information flows for supporting network-based mobile multicast services in NGNs. History Edition Recommendation Approval Study Group 1.0 ITU-T Y.2810 2012-03-29 13 Keywords Mobile, mobility management, multicast, NGN ii Rec. ITU-T Y.2810 (03/2012) FOREWORD The In
10、ternational Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical,
11、 operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in tu
12、rn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOT
13、E In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure,
14、e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not
15、 suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the
16、 evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which
17、may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2012 All rights reserved. No part of this publication may
18、be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.2810 (03/2012) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Convention
19、s 3 6 Design considerations . 3 6.1 Target applications and services . 3 6.2 Generic network models . 5 6.3 Functional requirements . 7 7 Functional architecture for mobile multicast in next generation networks 8 7.1 Service stratum . 9 7.2 Transport stratum 9 7.3 Management functions . 10 7.4 End-u
20、ser functions 10 8 Information flows for mobile multicast management 11 8.1 Information flows for the separated transport model . 11 8.2 Information flows for the unified transport model . 18 9 Security considerations . 23 Appendix I Example of transport stratum for the separated transport model . 2
21、4 Bibliography. 26 Rec. ITU-T Y.2810 (03/2012) 1 Recommendation ITU-T Y.2810 Mobility management framework for IP multicast communications in next generation networks 1 Scope The objective of this Recommendation is to describe the mobility management capabilities to support Internet Protocol (IP) mu
22、lticast-based services in next generation networks (NGNs). Specifically, this Recommendation pursues network-based mobile multicast support wherein multicast is handled without the involvement of the user equipment during handover. This Recommendation identifies design considerations, functional arc
23、hitecture, and information flows for supporting network-based mobile multicast services in NGNs. This Recommendation builds on the general mobility management functionalities described in ITU-T Q.1707 and multicast functionalities described in ITU-T Y.2017. 2 References The following ITU-T Recommend
24、ations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are theref
25、ore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-
26、alone document, the status of a Recommendation. ITU-T Q.1707 Recommendation ITU-T Q.1707/Y.2804 (2008), Generic framework of mobility management for next generation networks. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2010), Functional requirements and architecture of next generation networks. ITU-T
27、Y.2017 Recommendation ITU-T Y.2017 (2009), Multicast functions in next generation networks. ITU-T Y.2111 Recommendation ITU-T Y.2111 (2011), Resource and admission control functions in next generation networks. ITU-T Y.2701 Recommendation ITU-T Y.2701 (2007), Security requirements for NGN release 1.
28、 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 handover b-ITU-T Q.1706: The ability to provide services with some impact on their service level agreements to a moving object during and after movement. 3.1.2 mobility b-ITU-T Q.1706: Th
29、e ability for the user or other mobile entities to communicate and access services irrespective of changes of the location or technical environment. 3.1.3 mobility management b-ITU-T Q.1706: The set of functions used to provide mobility. These functions include authentication, authorization, locatio
30、n updating, paging, download of user information and more. 2 Rec. ITU-T Y.2810 (03/2012) 3.1.4 multicast b-ITU-T X.603: A data delivery scheme where the same data unit is transmitted from a single source to multiple destinations in a single invocation of service. 3.1.5 network-based mobility managem
31、ent ITU-T Q.1707: A mobility management scheme in which the MM signalling is performed (or controlled) by the network entities, on behalf of the UE. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 mobile multicast: The ability to provide seamless multi
32、cast-based services to user equipment (UE) on the move. 3.2.2 multicast group: A set of service users that abide by appropriate group-membership criteria, or a set of rules belonging to a group that enables multicast-based services and applications. 3.2.3 multicast source mobility: A mobility scenar
33、io wherein the source equipment of a multicast session is moving. 3.2.4 multicast receiver mobility: A mobility scenario wherein the receiver equipment of a multicast session is moving. 3.2.5 separated transport model: Mobility transport architecture wherein unicast data and multicast data from/to a
34、 node are treated with different transport mechanisms. 3.2.6 unified transport model: Mobility transport architecture wherein unicast data and multicast data from/to a node are treated with the same transport mechanism. 4 Abbreviations and acronyms This Recommendation uses the following abbreviation
35、s and acronyms: AAA Authentication, Authorization, Accounting ANI Application Network Interface A-MMCF Access MMCF C-MMCF Central MMCF HCF Handover Control Function IGMP Internet Group Management Protocol IP Internet Protocol IPTV Internet Protocol Television LMF Location Management Function MGMA Mu
36、lticast Group Management Agent MGMF Multicast Group Management Function MLD Multicast Listener Discovery MM Mobility Management MMCF Mobility Management Control Functions MR Multicast Router MUE Mobile User Equipment NACF Network Attachment Control Functions Rec. ITU-T Y.2810 (03/2012) 3 NGN Next Ge
37、neration Network NNI Network Network Interface PIM Protocol-Independent Multicast PIM-SM Protocol-Independent Multicast Sparse Mode QoS Quality of Service RACF Resource and Admission Control Functions RP Rendezvous Point SSM Source-Specific Multicast TUP-FE Transport User Profile Functional Entity U
38、E User Equipment UNI User Network Interface WiMAX Worldwide Interoperability for Microwave Access 5 Conventions None. 6 Design considerations In a mobile environment, multimedia streaming services such as personal broadcasting, video conferencing, and IPTV are considered primary applications and are
39、 based on group communications and IP multicast. Multicast plays a particularly important role and possesses many distinct advantages in mobile environments because it enables scalable and global multimedia streaming services. In NGNs, a wide variety of services and applications using multicast are
40、expected to be used with user equipment (UE) operating over fixed and mobile access networks. Furthermore, it is desirable that new functionality for multicast-based services need not be installed on UE considering backward compatibility with legacy UE. This Recommendation aims to develop a mobility
41、 management (MM) framework to support multicast communications in NGNs. To provide multicast-based services in NGNs, MM capabilities need to be combined and interoperated efficiently with multicast capabilities. These capabilities enable UE to receive multicast data continuously even while moving am
42、ong different access networks. From these observations, it is noted that there is a crucial need to develop some promising MM schemes or protocols in order to provide seamless mobile multicast services under the mobility environments of NGNs. 6.1 Target applications and services Generally, mobile mu
43、lticast services mean that a service provider supports various multimedia services for the restricted user group in a mobile environment. A user has to join the multicast group for services offered by the multicast source. Once the user is a member of the multicast group, a multicast delivery path i
44、s constructed between the multicast source and user using multicast protocol such as protocol-independent multicast (PIM). Leaving a multicast group, a user cannot receive any multicast traffic from the source. When a user moves to another network, the corresponding procedures, unlike the unicast se
45、rvice, should be followed for seamless multicast service. To satisfy these requirements, some technical issues different from those applied to the fixed network should be considered. 4 Rec. ITU-T Y.2810 (03/2012) This Recommendation supports IP-based multimedia multicast applications with the follow
46、ing characteristics: a) Multicast applications and/or services with receiver mobility Personal broadcasting is a service wherein the mobile multicast framework is applicable. The user can act as a multicast source, and other users who want to use the multicast service get source information, includi
47、ng group addresses, by online or offline advertisement. To provide the mobile multicast services, MM capabilities, including Access Mobility Management Control Functions (A-MMCFs) and Central Mobility Management Control Functions (C-MMCFs), interwork with multicast capabilities such as multicast rou
48、ters (MRs). After users join the multicast group, they can receive multicast traffic from the source. The delivery path can be changeable dynamically as handover between access networks occurs (see Figure 6-1). The mobile multicast framework can be adopted not only for a given service but for any ap
49、plication with multiple mobile receivers. Y.2810(12)_F6-1NGNaccess networkMRA-MMCFMulticastsourceMRNGN core networkA-MMCFMRMRA-MMCFC-MMCFA-MMCFA-MMCFMRMR (RP)MUEMUEMUEHandoverFigure 6-1 Multicast applications and/or services for receiver mobility b) Multicast applications and/or services with source mobility Supporting the handover scenario is recommended in the aspect of multicast source (see Figure 6-2). In applications such as video conferencing and mobile broadcasting, a user participating in the service can be
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