1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T H.772 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2015) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS IPTV multimedia services and applications for IPTV IPTV service discovery up to consumption IPTV terminal device d
2、iscovery Recommendation ITU-T H.772 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 C
3、ommunication procedures H.240H.259 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisua
4、l and multimedia services H.360H.369 Telepresence H.420H.429 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.51
5、9 Mobile multimedia collaboration applications and services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration inter-wo
6、rking procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 Ubiquitous sensor network applications and Internet of Things H.640H.649 IPTV MULTIMEDIA SERVICES AND APPLIC
7、ATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 Digital Signage H.780H.789
8、E-HEALTH MULTIMEDIA SERVICES AND APPLICATIONS Personal health systems H.810H.819 Interoperability compliance testing of personal health systems (HRN, PAN, LAN, TAN and WAN) H.820H.859 Multimedia e-health data exchange services H.860H.869 For further details, please refer to the list of ITU-T Recomme
9、ndations. Rec. ITU-T H.772 (11/2015) i Recommendation ITU-T H.772 IPTV terminal device discovery Summary Recommendation ITU-T H.772 describes mechanisms for Internet protocol television (IPTV) terminal device (TD) discovery that make IPTV terminal devices discoverable and selectable to one another w
10、ithin a public or local network environment. For example, terminal device discovery is useful for services that allow users to share content with other terminal devices. This Recommendation also describes the connection model and functional architecture for IPTV terminal device functional blocks to
11、support the IPTV terminal device discovery mechanism. Moreover, the procedures of IPTV terminal device discovery are given in this Recommendation. In addition, the reference point, the related protocols, elements and attributes to be used in the communication messages are also specified in this Reco
12、mmendation. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T H.772 2015-11-29 16 11.1002/1000/12650 * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handl
13、e.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.772 (11/2015) 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 (IT
14、U-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 four
15、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, the n
16、ecessary 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. How
17、ever, 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 negativ
18、e 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 RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use o
19、f 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, I
20、TU 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.i
21、tu.int/ITU-T/ipr/. ITU 2016 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 H.772 (11/2015) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 T
22、erms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Introduction . 3 6.1 Overview of terminal device discovery 4 7 Functional architecture of terminal device discovery . 5 7.1 Agent functional block . 6 7.2 Server functional block . 6 8 Terminal device discovery
23、process . 7 8.1 Registration-based terminal device discovery process . 7 8.2 Broadcast-based terminal device discovery process 10 8.3 Capability discovery . 12 9 Reference point and protocols 14 9.1 Reference points . 14 9.2 Protocols . 15 10 Discovery information 17 10.1 Attributes/elements used in
24、 registration-based terminal device discovery request . 17 10.2 Attributes/elements used in broadcast-based terminal device discovery request . 23 10.3 Attributes/elements used in terminal capability discovery description 24 Appendix I Informative procedure of registration-server address acquiring r
25、egarding the MDS 26 Appendix II Example of registration server group deployment . 27 Bibliography. 29 Rec. ITU-T H.772 (11/2015) 1 Recommendation ITU-T H.772 IPTV terminal device discovery 1 Scope This Recommendation describes the mechanisms for Internet protocol television (IPTV) terminal device (T
26、D) discovery. These mechanisms enable IPTV terminal devices to provide end-users with effective ways to discover and select terminal devices. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this
27、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 Recommendations and other r
28、eferences 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 H.721 Recommendation ITU-T H.721 (2015), IPTV terminal devices
29、: Basic model. ITU-T H.722 Recommendation ITU-T H.722 (2014), IPTV terminal device: Full-fledged model. ITU-T H.770 Recommendation ITU-T H.770 (2015), Mechanisms for service discovery and selection for IPTV services. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following te
30、rms defined elsewhere: 3.1.1 acquisition b-ITU-T Y.1901: The process of obtaining content by the end-user. NOTE For content with accessibility features, this means that the content will be available in a form that can be used by the end-user. 3.1.2 application b-ITU-T Y.1901: A structured set of cap
31、abilities, which provide value-added functionality supported by one or more services. 3.1.3 end user b-ITU-T Y.1910: 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. 3.1.4 functional architecture b-ITU-T Y.201
32、2: A set of functional entities and the reference points between them used to describe the structure of an NGN. These functional entities are separated 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
33、configurations. These reference configurations identify which reference points are visible at the boundaries of equipment implementations and between administrative domains. NOTE 2 This definition is taken from b-ITU-T Y.2012 and therefore relates to NGN. However, it is also valid for other networks
34、, e.g., networks supporting IPTV terminal device. 3.1.5 home network (HN) b-ITU-T H.622: Home network is the collection of elements that process, manage, transport, and store information, thus enabling the connection and integration of multiple computing, control, monitoring, communication and enter
35、tainment devices in the home. 2 Rec. ITU-T H.772 (11/2015) 3.1.6 Internet protocol television (IPTV) b-ITU-T Y.1901: Multimedia services such as television/video/audio/text/graphics/data delivered over IP-based networks managed to support the required level of QoS/QoE, security, interactivity and re
36、liability. 3.1.7 IPTV TD b-ITU-T Y.1901: A terminal device which has ITF functionality, e.g., a STB. 3.1.8 IPTV terminal function (ITF) b-ITU-T Y.1901: The end-user function(s) associated with a) receiving and responding to network control channel messages regarding session set-up, maintenance, and
37、teardown, and b) receiving the content of an IP transport from the network and rendering. 3.19 service discovery (SD) ITU-T H.770: The mechanisms for service provider discovery, service discovery and selection for IPTV services. The mechanisms enable IPTV terminal devices to provide the end-users wi
38、th effective ways for consuming IPTV services. 3.1.10 service provider b-ITU-T M.1400: A general reference to an operator that provides telecommunication services to customers and other users either on a tariff or contract basis. A service provider can optionally operate a network. A service provide
39、r 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-user. 3.2 Terms defined in this Recommendation This Recommendation defines the following t
40、erms: 3.2.1 multiple device service: The mechanisms for a multi-device service, which includes the entire system architecture, core functional requirement of multi-device enabled systems, technologies that support the multi-device service, service prospects, system API and interface. 3.2.2 terminal
41、device discovery: A procedure that allows IPTV terminal devices to discover other IPTV terminal devices and their capabilities, as required for the provisioning of convergent, multi-device IPTV services. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms:
42、AES Advanced Encryption Standard DNS Domain Name System HN Home Network HTTP Hypertext Transfer Protocol HTTPS Secure Hypertext Transfer Protocol IPTV Internet Protocol Television MDS Multi-Device Service RP Reference Point SD Service Discovery SP Service Provider STB Set-Top Box TD Terminal Device
43、TDD Terminal Device Discovery Rec. ITU-T H.772 (11/2015) 3 UI User Interface URL Uniform Resource Locator XML extensible Mark-up Language 5 Conventions In this Recommendation: The keywords “is required to“ indicate a requirement which must be strictly followed and from which no deviation is permitte
44、d if conformance to this document is to be claimed. The keywords “is prohibited from“ indicate a requirement which must be strictly followed and from which no deviation is permitted if conformance to this document is to be claimed. The keywords “is recommended“ indicate a requirement which is recomm
45、ended but which is not absolutely required. Thus this requirement need not be present to claim conformance. The keywords “is not recommended“ indicate a requirement which is not recommended but which is not specifically prohibited. Thus, conformance with this specification can still be claimed even
46、if this requirement is present. The keywords “can optionally“ indicate an optional requirement which is permissible, without implying any sense of being recommended. This term is not intended to imply that the vendors implementation must provide the option and the feature can be optionally enabled b
47、y the network operator/service provider. Rather, it means the vendor may optionally provide the feature and still claim conformance with the specification. 6 Introduction With the proliferation of digital content and the expanding variety of connected and IP-enabled Internet protocol television (IPT
48、V) terminal devices (TDs) such as the basic model ITU-T H.721, full-fledged model ITU-T H.722 and mobile model b-ITU-T H.IPTV-TDES.4, consumers can access and share IPTV services seamlessly inside or outside their home network (HN). For the purpose of IPTV services sharing between IPTV TDs, after fi
49、nishing the service provider (SP) service discovery (SD) procedure, as is defined in ITU-T H.770, an IPTV TD will initiate the terminal device discovery (TDD) procedure to connect with other IPTV TDs for the convergent IPTV services. Several steps towards terminal device discovery and device capability acquisition are included, as illustrated in Figure 6-1. Figure 6-1 Scope of this Recommendation and the TDD procedure in general 4 Rec. ITU-T H.772 (11/2015) NOTE: IPTV TD discovery reque
