1、 ETSI TS 184 009 V2.1.1 (2008-10)Technical Specification Telecommunications and Internet converged Services andProtocols for Advanced Networking (TISPAN);Rules covering the use of TV URIs forthe Identification of Television ChannelsETSI ETSI TS 184 009 V2.1.1 (2008-10)2Reference RTS/TISPAN-04017-NGN
2、-R2 Keywords addressing, architecture, ID ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Indiv
3、idual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Documen
4、t Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the cur
5、rent status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reprodu
6、ced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2008. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI
7、 registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 184 009 V2.1.1 (2008-10)3Contents Intellectual Property Rights 4g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g32.1 No
8、rmative references . 5g32.2 Informative references 6g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 Requirements on the use of the TV URI 6g34.1 TV URI for IPTV presence 6g34.2 TV URI for Electronic Program Guide 7g34.3 TV URI for NNI for IPTV 7g35 Identification o
9、f television channels with TV URI 7g35.1 TV URI syntax and semantics 8g35.2 Naming a television channel with a TV URI 8g35.2.1 Harmonization of TV URIs 8g35.2.2 Rules for the harmonization of TV URIs 9g35.2.3 Dispute resolution . 10g36 Resolution of TV URIs. 10g3Annex A (informative): Bibliography .
10、 11g3Annex B (informative): Change history . 12g3History 13g3ETSI ETSI TS 184 009 V2.1.1 (2008-10)4Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly avai
11、lable for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web serv
12、er (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be
13、, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). Introduction The present document provides rules for the ide
14、ntification (“naming“) of television channels using the TV URI identifier. Unambiguous identification is required when different parties (end users, IPTV providers, content providers, etc.) want to refer to the same television channel. The present document provides requirements for such identificati
15、ons, rules for the identification of television channels and technical options to resolve the channel identification. ETSI ETSI TS 184 009 V2.1.1 (2008-10)51 Scope The present document provides rules for the identification (“naming“) of television channels using the TV URI identifier. 2 References R
16、eferences are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: -
17、if it is accepted that it will be possible to use all future changes of the referenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org
18、/Reference. For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably, the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for
19、 the expected life of the document. The reference shall include the method of access to the referenced document and the full network address, with the same punctuation and use of upper case and lower case letters. NOTE: While any hyperlinks included in this clause were valid at the time of publicati
20、on ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced docume
21、nt (including any amendments) applies. 1 ETSI TR 180 000: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Terminology“. 2 ETSI TS 182 008: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Prese
22、nce Service; Architecture and functional description (Endorsement of 3GPP TS 23.141 and OMA-AD-Presence-SIMPLE-V1-0)“. 3 ETSI TS 181 016: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Service Layer Requirements to integrate NGN services and IPTV“
23、. 4 ETSI TS 182 027: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IPTV Architecture; IPTV functions supported by the IMS subsystem“. 5 ETSI TS 182 028: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TI
24、SPAN); IPTV Architecture; Dedicated subsystem for IPTV functions“. 6 ETSI TS 183 063: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based IPTV stage 3 specification“. 7 IETF RFC 2838: “Uniform Resource Identifiers for Television Broadcasts“.
25、ETSI ETSI TS 184 009 V2.1.1 (2008-10)68 IETF RFC 3986: “Uniform Resource Identifier (URI): Generic Syntax“. 9 ETSI TS 183 064: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Dedicated IPTV subsystem stage 3 specification“. 2.2 Informative referenc
26、es The following referenced documents are not essential to the use of the present document but they assist the user with regard to a particular subject area. For non-specific references, the latest version of the referenced document (including any amendments) applies. Not applicable. 3 Definitions a
27、nd abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 180 000 1, TS 181 016 3 and the following apply: tv URI: identification of a broadcast television channel 3.2 Abbreviations For the purposes of the present document, the following abbrevi
28、ations apply: BC Broadcast DNS Domain Name System EPG Electronic Program Guide IPTV Internet Protocol TeleVision TV TelevisionURI Uniform Resource Identifier XML Extensible Markup Language 4 Requirements on the use of the TV URI This clause sets requirements on the use of the TV URI for the identifi
29、cation of broadcast television channels for applications that require such identification. 4.1 TV URI for IPTV presence Presence TS 182 008 2 is the application where one user (the “watcher“) can see the status of another user (the “presentity“). In case of IPTV, an item in the presence information
30、may be the television channel currently accessed. According to TS 181 016 3: “It shall be possible to define presence information related to the IPTV experience, e.g. channel currently accessed. The identification of the channel currently accessed shall be machine-readable. Language dependent inform
31、ation may also be made available to watchers.“ According to TS 182 027 4:“If the IPTV presence attribute “channel currently accessed“ is supported, then the machine-readable part of the identification of the channel shall be globally unique. The term globally unique here means that there is no ambig
32、uity in the identification of the channel if presentity and watcher (for terminology, see in TS 182 008 2) are with different network operators and/or in different countries.“ Document TS 183 063 6 contains a stage-3 description of the IPTV presence service. The XML schema for presence information i
33、ncludes the “BCServiceID“ parameter, which corresponds with the “channel currently accessed“ in TS 181 016 3 and TS 182 027 4. ETSI ETSI TS 184 009 V2.1.1 (2008-10)7Req. 4.1.1: If the “BCServiceID“ parameter is used, then it shall be populated with a TV URI. 4.2 TV URI for Electronic Program Guide E
34、lectronic Program Guide (EPG) is “an assistance tool which helps users to locate the content they want and to facilitate the selection of IPTV services for watching, recording, etc.“ TS 181 016 3, TS 182 027 4, TS 182 028 5, TS 183 063 6 and TS 183 064 9. EPGs refer to television channels. Req. 4.2.
35、1: If the IPTV provider and the provider of the EPG service are different parties, then the EPG shall use the TV URI to identify television channels. Req. 4.2.2: If the IPTV provider and the provider of the EPG service are the same party, then the EPG may use the TV URI to identify television channe
36、ls. Req. 4.2.3: In an IMS-based IPTV system, the TV URI should be used in the EPG conforming to TS 183 063 6, clause L.2.3. Req. 4.2.4: In a dedicated IPTV systems, the TV URI should be used in the EPG conforming to TS 183 064 9, clause 9.2.1.1. 4.3 TV URI for NNI for IPTV NNI for IPTV is the interc
37、onnection between an IPTV Provider and another IPTV Provider or a content Provider to exchange content, like broadcast television channels (BC). If the broadcast television channels are exchanged on an on-demand basis then the identification of television channels is needed. Req. 4.3.1: If different
38、 parties exchange broadcast television channels on an on-demand basis, then the TV URI shall be used to identify those television channels. 5 Identification of television channels with TV URI Identification of a TV channel is an answer to the question “What is the name of this TV channel?“. Identifi
39、cation of TV channels is done by human, e.g. the end-user programming his set-top box, or an engineer at the IPTV provider filling in channel lists. Figure 1 illustrates the distinction between identification of television channels (this clause), and their resolution (see clause 6). Figure 1: Identi
40、fication of TV channels is performed by humans ETSI ETSI TS 184 009 V2.1.1 (2008-10)85.1 TV URI syntax and semantics Television channels are identified by a tv:URI as specified in RFC 2838 7. The basic structure of a television URI is: tv: where broadcast is a description of the data source. The des
41、cription takes the form of a DNS-style identifier for a particular broadcaster or television network. EXAMPLE 1: tv:wqed.org the WQED station tv: the NBC network In the simplest form, domain names themselves are used as broadcast identifiers. EXAMPLE 2: tv: the American Broadcast Company tv:abc.co.a
42、u the Australian Broadcast Corporation In some cases, networks have multiple broadcast streams that need to be distinguished. This is also handled in DNS style: tv: HBO East tv: HBO West 5.2 Naming a television channel with a TV URI The present document follows a so-called harmonization approach in
43、the identification of television channels. This clause explains the harmonization approach and provides rules for the harmonization. 5.2.1 Harmonization of TV URIs The purpose of standardization is to improve interoperability and hence and reduce identification ambiguity. The following approaches ca
44、n be recognized in reducing the ambiguity in the identification of TV channels: Free-format text field. Harmonization. Registry. The first approach is the definition of a free-format text field. This would enable the identification. However, it leaves much ambiguity on how this text field should be
45、used. The second approach is the specification of harmonized syntax and semantics rules. This is essentially what the tv:URI is. The syntax of the tv:URI is defined in RFC 2838 7: tv:, with being a DNS-style identifier. Examples of semantics rules are the following. The third approach is the establi
46、shment of a registry for tv:URIs. The registry would enforce rules like the above ones, and establish additional rules when needed. Notice that there will still remain ambiguity, as the registry can and will be incomplete. For example, the Showview channel lists maintained by Gemstar are incomplete,
47、 as it only covers TV channels in a limited set of countries and within those countries, various local and regional TV channels are missing in the lists. Figure 2 illustrates a view on how the different approaches compare to each other in reducing the ambiguity in the identification of TV channel. E
48、TSI ETSI TS 184 009 V2.1.1 (2008-10)9Figure 2: Effectively of a harmonization approach to identify television channels with the TV URI So, the harmonization approach will quickly cover the majority of the TV channels. By adding harmonization rules when needed, the percentage of TV channels unambiguo
49、usly identified can quickly become very high. In contrast, a registry approach will take much time, effort and cost. The registry has to be established, including funding, governance and policies. The registry will have to comply with various national and international regulations. Rules and procedures have to be made on which entities can populate the registry and how the creation, reading, updating and deletion of records is managed. So, the harmonized approach is most effective on
