1、 International Telecommunication Union ITU-T Y.1910TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2008) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects IPTV over NGN IPTV functional architecture Recommendation ITU-T Y
2、.1910 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 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numberin
3、g, 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, access, network capabilities and resource management Y.1200Y.1299 T
4、ransport 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 NEXT GENERATION NETWORKS Frameworks and functional architecture mode
5、ls 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, naming and addressing Y.2300Y.2399 Network management Y.2400Y.2499 Net
6、work control architectures and protocols Y.2500Y.2599 Future networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.1910 (09/2008) i Recommendation
7、ITU-T Y.1910 IPTV functional architecture Summary Recommendation ITU-T Y.1910 describes the IPTV functional architecture intended to support IPTV services based on the IPTV service requirements and definitions. Starting from a basic description of IPTV roles and services, a high level IPTV functiona
8、l model is outlined. This model is then developed into a set of functional architectures which support NGN and non-NGN transport networks, as well as operation modes with or without IMS. Source Recommendation ITU-T Y.1910 was approved on 12 September 2008 by ITU-T Study Group 13 (2005-2008) under Re
9、commendation ITU-T A.8 procedures. ii Rec. ITU-T Y.1910 (09/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector
10、(ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, 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 fo
11、ur years, establishes the topics for study by the ITU-T study groups which, in turn, 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, th
12、e necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE 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.
13、However, the Recommendation may contain certain mandatory provisions (to ensure 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 negati
14、ve equivalents are used to express requirements. The use of such words does not 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
15、 of a claimed Intellectual Property Right. ITU takes no position concerning the 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,
16、 ITU had not received notice of intellectual property, protected by patents, which 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
17、.itu.int/ITU-T/ipr/. ITU 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.1910 (09/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defi
18、ned within this Recommendation 2 4 Abbreviations and acronyms 3 5 Conventions 5 6 IPTV domains. 5 7 IPTV architectural approaches . 6 7.1 Architectural approaches 6 7.2 Architectural differences 7 8 IPTV functional architecture framework 7 8.1 End-user functions 8 8.2 Application functions . 8 8.3 S
19、ervice control functions 8 8.4 Content delivery functions . 8 8.5 Network functions 9 8.6 Management functions . 9 8.7 Content provider functions. 9 9 IPTV architectural overview. 9 9.1 End-user functions 11 9.2 Application functions . 12 9.3 Service control functions 13 9.4 Content delivery functio
20、ns . 13 9.5 Network functions 14 9.6 Management functions . 15 9.7 Content provider functions. 15 10 IPTV functional architectures. 15 10.1 Description of functions specific to the non-NGN IPTV functional architecture . 16 10.2 Description of functions specific to NGN IPTV functional architectures .
21、 18 10.3 Description of functions common to the three architectural approaches . 23 10.4 Interworking . 32 11 Reference points . 34 11.1 Reference points with characteristics common to all three IPTV architectures 38 iv Rec. ITU-T Y.1910 (09/2008) Page 11.2 Reference points with characteristics spec
22、ific to non-NGN IPTV architecture . 41 11.3 Reference points with characteristics specific to NGN non-IMS IPTV architecture . 42 11.4 Reference Points specific to NGN IMS IPTV Architecture. 43 Annex A Relationship between IPTV and NGN architectures. 46 A.1 IPTV-related components in the NGN architec
23、ture . 46 A.2 Functional mapping between NGN-based IPTV and NGN architectures 47 A.3 Application support functions and service support functions 47 Appendix I Procedural flows relating to IPTV services . 49 I.1 High level flows . 49 I.2 Procedural flows for IPTV services based on NGN non-IMS IPTV ar
24、chitectures 59 I.3 Procedural flows for IPTV services based on NGN IMS IPTV architecture . 69 I.4 Procedural flows for IPTV interconnection between two NGN networks. 73 Appendix II Potential protocols that could be used on IPTV reference points. 77 Appendix III IPTV physical network hierarchy . 81 A
25、ppendix IV Overlay networking function for IPTV services and multicast 83 Appendix V Adaptation of the IPTV architecture for HFC networks 84 Appendix VI Nomadism for IPTV services 87 VI.1 Interconnection with the visited network . 87 VI.2 Interconnection with third party service providers. 91 Biblio
26、graphy. 93 Rec. ITU-T Y.1910 (09/2008) 1 Recommendation ITU-T Y.1910 IPTV functional architecture 1 Scope This Recommendation describes the IPTV functional architecture intended to support IPTV services based on the IPTV service requirements and definitions b-ITU-T IPTVFG. Starting from a basic desc
27、ription of IPTV roles and services, a high level IPTV functional model is outlined. This model is then developed into a more detailed functional architecture. Specific cases are also described in more detail. The IPTV functional architecture is based on the use of existing network components and tec
28、hnologies, as well as on NGN architectures. This leads to three possible options for the architectural representations: 1) IPTV functional architecture for non-NGN network components. 2) IPTV functional architecture based on the NGN functional architecture, but not based on IMS. 3) IPTV functional a
29、rchitecture based on NGN and its IMS components. The common elements between these alternatives, as well as the differences, are described in this Recommendation. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitut
30、e 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 therefore encouraged to investigate the possibility of applying the most recent edition of the Recomm
31、endations 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-alone document, the status of a Recommendation. ITU-T M.1400 Recommendation ITU-T M.1400 (2006)
32、, Designations for interconnections among operators networks. ITU-T M.3050.1 Recommendation ITU-T M.3050.1 (2007), Enhanced Telecom Operations Map (eTOM) The business process framework. ITU-T Q.1290 Recommendation ITU-T Q.1290 (1998), Glossary of terms used in the definition of intelligent networks.
33、 ITU-T Y.2012 Recommendation ITU-T Y.2012 (2006), Functional requirements and architecture of the NGN release 1. ITU-T Y.2014 Recommendation ITU-T Y.2014 (2008), Network attachment control functions in next generation networks. ITU-T Y.2021 Recommendation ITU-T Y.2021 (2006), IMS for Next Generation
34、 Networks. ITU-T Y.2111 Recommendation ITU-T Y.2111 (2006), Resource and admission control functions in Next Generation Networks. 2 Rec. ITU-T Y.1910 (09/2008) 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 application b-ITU-T Y.101: A
35、 structured set of capabilities, which provide value-added functionality supported by one or more services. 3.1.2 functional architecture ITU-T Y.2012: A set of functional entities and the reference points between them used to describe the structure of an NGN. These functional entities are separated
36、 by reference points, and thus, they define the distribution of functions. NOTE 1 The functional entities can be used to describe a set of reference configurations. These reference configurations identify which reference points are visible at the boundaries of equipment implementations and between a
37、dministrative domains. NOTE 2 This definition is taken from ITU-T Y.2012 and therefore relates to NGN. However, it is also valid for other networks, e.g., networks supporting IPTV. 3.1.3 functional entity ITU-T Y.2012: An entity that comprises an indivisible set of specific functions. Functional ent
38、ities are logical concepts, while groupings of functional entities are used to describe practical, physical implementations. 3.1.4 reference point ITU-T Y.2012: A conceptual point at the conjunction of two non-overlapping functional entities that can be used to identify the type of information passi
39、ng between these functional entities. NOTE A reference point corresponds to one or more physical interfaces between pieces of equipment. 3.1.5 service provider ITU-T M.1400: A general reference to an operator that provides telecommunication services to customers and other users either on a tariff or
40、 contract basis. A service provider can optionally operate a network. A service provider can optionally be a customer of another service provider. NOTE Typically, the service provider acquires or licenses content from content providers and packages this into a service that is consumed by the end-use
41、r. 3.1.6 subscriber ITU-T M.3050.1: The subscriber is responsible for concluding contracts for the services subscribed to and for paying for these services. 3.2 Terms defined within this Recommendation This Recommendation defines the following terms: 3.2.1 content provider: The entity that owns or i
42、s licensed to sell content or content assets. 3.2.2 delivery: In the context of IPTV architecture, “delivery“ is defined as sending contents to the end user. 3.2.3 distribution: In the context of IPTV architecture, “distribution“ is defined as sending the content to appropriate intermediate location
43、s to enable subsequent delivery. 3.2.4 end user: The actual user of the products or services. NOTE The end-user consumes the product or service. An end-user can optionally be a subscriber (see definition of “subscriber“). 3.2.5 linear television (linear TV): A television service in which a continuou
44、s stream flows in real time from the service provider to the terminal device and where the user cannot control the temporal order in which contents are viewed. Rec. ITU-T Y.1910 (09/2008) 3 3.2.6 network provider: The organization that maintains and operates the network components required for IPTV
45、functionality. NOTE 1 A network provider can optionally also act as service provider. NOTE 2 Although considered as two separate entities, the service provider and the network provider can optionally be one organizational entity. 3.2.7 video on demand (VoD): A service in which the end user can, on d
46、emand, select and view video content and where the end user can control the temporal order in which the video content is viewed (e.g., the ability to start the viewing, pause, fast forward, rewind, etc.). NOTE The viewing may occur some time after the selection of the video content. 4 Abbreviations
47、and acronyms This Recommendation uses the following abbreviations and acronyms: AS-FE Application Support Functional Entity BGCF Breakout Gateway Control Function CD service provider; network provider; end user. The functional elements constituting these above domains are described in more detail in
48、 clause 8. 7 IPTV architectural approaches 7.1 Architectural approaches This Recommendation identifies three IPTV architecture approaches that enable service providers to deliver IPTV services: 1) “Non-NGN IPTV functional architecture“ (non-NGN IPTV): The non-NGN IPTV architecture is based on existi
49、ng network components and protocols/interfaces. The technology components, protocols and interfaces used in this IPTV architecture are already in use and hence this approach is a representation of typical existing networks providing IPTV services. This architectural approach can optionally be used as the basis for evolution towards the other IPTV architectures listed below. 2) “NGN-based non-IMS IPTV functional architecture“ (NGN non-IMS IPTV): The NGN non-IMS IPTV architecture utilizes com
