1、 International Telecommunication Union ITU-T Series YTELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 5(05/2008) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS ITU-T Y.1900-series Supplement on IPTV service use cases ITU-T Y-series Recom
2、mendations Supplement 5 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
3、.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, access, network capabilities and resource managem
4、ent 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 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000
5、Y.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 Network cont
6、rol architectures and protocols Y.2500Y.2599 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 For further details, please refer to the list of ITU-T Recommendations. Y series Supplement 5 (05/2008) i Supplement 5 to ITU-T Y-series Recommendations ITU-T Y.1900-series Supplement on IPTV service
7、 use cases Summary This IPTV service use cases supplement provides a list of IPTV use cases that are informative illustrations of how IPTV services can be designed, deployed and operated. From the end-users perspective, use cases have been categorized by distributed content services, interactive ser
8、vices, communication services, etc. Source Supplement 5 to ITU-T Y-series Recommendations was agreed on 22 May 2008 by ITU-T Study Group 13 (2005-2008). ii Y series Supplement 5 (05/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field o
9、f 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, operating and tariff questions and issuing Recommendations on them with a view to standardizing
10、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 turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by
11、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. NOTE In this publication, the expression “Administration“ is used for conciseness to indicate both a
12、 telecommunication administration and a recognized operating agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the publication is achieved when all of these m
13、andatory 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 suggest that compliance with the publication is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws
14、attention to the possibility that the practice or implementation of this publication may involve the use 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 othe
15、rs outside of the publication development process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementers are cautioned that this may not represent the late
16、st information and are therefore strongly urged to consult the TSB patent database at http:/www.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. Y series Supplement 5 (05/2008) iii C
17、ONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this supplement. 1 4 Abbreviations and acronyms 1 5 Conventions 2 6 IPTV service descriptions and use cases 2 6.1 Distributed content services . 2 6.2 Interactive services . 15 6.3 Communication
18、 services 19 6.4 Others . 20 7 Payment methods for accessing IPTV services 26 Bibliography. 27 Y series Supplement 5 (05/2008) 1 Supplement 5 to ITU-T Y-series Recommendations ITU-T Y.1900-series Supplement on IPTV service use cases 1 Scope This IPTV service use cases supplement provides a list of I
19、PTV use cases that are informative illustrations of how IPTV services can be designed, deployed and operated. From the end-users perspective, use cases have been categorized by distributed content services, interactive services, communication services, etc. 2 References None. 3 Definitions 3.1 Terms
20、 defined elsewhere This supplement uses the following terms defined elsewhere: 3.1.1 network provider b-ITU-T Q.1290: The organization that maintains and operates the network components required for IN functionality. A network provider may also take more than one role, e.g., also acting as Service P
21、rovider. 3.1.2 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 may or may not operate a network. A Service Provider can optionally be a Customer of anoth
22、er Service Provider. 3.2 Terms defined in this supplement This supplement defines the following terms: 3.2.1 application provider: The entity providing IPTV-related user applications. 3.2.2 content aggregator: A player in the IPTV service delivery chain whose role is to aggregate content, e.g., form
23、ing a TV bouquet composed of several TV channels. 3.2.3 content provider: The entity owning content or being licensed to sell content assets whose role is content delivery. 3.2.4 electronic program guide (EPG): A structured set of data that provides information on available content accessed by end-u
24、sers. 4 Abbreviations and acronyms This supplement uses the following abbreviations and acronyms: A/V Audio/Video DVD Digital Versatile Disk DVR Digital Video Recorder EAN Emergency Alert Notification ECG Electronic Content Guide ECI Emergency Communications Information 2 Y series Supplement 5 (05/2
25、008) ECN Emergency Communications Notification ECR Emergency Communications Report EPG Electronic Program Guide FTP File Transfer Protocol IM Instant Messaging IPPV Impulse PPV MoD Music on Demand NVoD Near VoD OPPV Order-ahead PPV PDA Personal Digital Assistant PPU Pay Per Use PPV Pay Per View PVR
26、Personal Video Recorder QoS Quality of Service SMS Short Message Service UCC User Created Content VCR Video Cassette Recorder VoD Video on Demand VoIP Voice over IP NOTE In the context of this supplement, the abbreviation VoD includes video, audio and associated metadata. 5 Conventions In this suppl
27、ement, there are no specific conventions. 6 IPTV service descriptions and use cases This clause provides descriptions and use cases of various IPTV services, which are not exhaustive. It is categorized by their service characteristics from the end-users perspective. 6.1 Distributed content services
28、6.1.1 Broadcast services Broadcast services comprise a one-way transmission of content from one point (the source) to two or more points (the receivers). The end-user has no control over the content or timing of what he or she receives, apart from the ability to select a particular channel. 6.1.1.1
29、Linear TV Linear TV is a broadcast service that is the same as the conventional form of television services that are provided by cable, terrestrial and direct-to-the-home satellite operators, where the programme content is transmitted according to a defined schedule and is intended for real-time con
30、sumption by the end-user. The service, therefore, provides an essentially continuous stream flowing from the content provider to the terminal device located in the end-user network. Y series Supplement 5 (05/2008) 3 Linear TV includes (but is not necessarily limited to) the following approaches: Lin
31、ear TV with audio and video: Audio and video (A/V) signals are broadcasted and distributed to the downlink without end-user control of the broadcast. Audio only: Audio signals are broadcasted and distributed to the downlink without end-user control of the broadcast. Linear TV with audio, video, and
32、data: These A/V services are combined with interactive data for the related or supplementary information of A/V programs using bi-directional links. The end-user can watch the downlink A/V stream and can simultaneously access more detailed or value-added information via the uplink. Figure 6-1 shows
33、an example of a linear TV service with client PVR. Figure 6-1 Example of linear TV with client PVR Figure 6-2 shows a use case of linear TV service. Figure 6-2 Use case of linear TV 4 Y series Supplement 5 (05/2008) 1) Contents (video, audio, data, etc.) with related metadata and content protection
34、(CP) data are produced and managed by the content provider, and are delivered to the service provider. 2) The service provider then formats the data prepared by the content provider into IP packets, and controls the program schedule and distribution. Then, the scheduled channel information is provid
35、ed to the end-users, indicating the content is ready for consumption. 3) When an end-user wants to access the linear TV service or selects a channel, the request is sent to the service provider. This procedure may include service negotiation (e.g., QoS, price, etc.) and service availability confirma
36、tion procedures. 4) If the end-user is granted access to the linear TV service, the service provider interacts with the network provider to transmit the requested content. This procedure may include reserving and allocating network resources to guarantee the contracted service level. 5) Upon complet
37、ion of step 4, the service provider supplies channel access information (e.g., the multicast address assigned to the requested channel) to the end-user. Then he or she can access and watch the channel. 6.1.1.2 Linear TV with trick mode Linear TV with trick mode enables the end-user to pause linear T
38、V. For the ability to skip content and for other capabilities (e.g., instant replay), the use of PVR is required. The personal video recorder (PVR) provides capability of end-user-controlled electronic device that records Linear TV and stores it in a digital storage facility, either in stand-alone s
39、et-top boxes or in the network. This capability can support “time-shifting“, “trick modes“, and complementary convenience functions, such as programming and remote control by PDA, networked PC, or web browser. Figure 6-3 shows a use case of a linear TV service with trick mode: Figure 6-3 Use case of
40、 linear TV with trick mode Y series Supplement 5 (05/2008) 5 Steps 1 to 5 are the same as those depicted in Figure 6-2. 6a) When the end-users IPTV terminal has its own storage capability and the end-user requests any trick mode function, the programmed content is recorded by the storage function an
41、d may be displayed later according to the end-users selection or the constraints provided by the content protection metadata. 6b) If the end-user requests the trick mode service without any local storage capability (e.g., embedded in his or her IPTV terminal), then the programmed content is recorded
42、 in the storage facility managed by the service provider. The selected content can then be displayed later by the end-user, according to the constraints provided by the content protection metadata. 6.1.1.3 Pay per view Pay per view (PPV) is a streaming service where end-users can purchase events or
43、programs to be seen on IPTV terminal device. The user can buy the PPV service, e.g., via an on-screen guide, a telephone, or through the Internet, and see the brought events or programs at any time within the expiration date. Order-ahead PPV (OPPV): The ability to order PPV programming ahead of time
44、. Impulse PPV (IPPV): The ability to order PPV programming impulsively. 6.1.1.4 Electronic program guide (EPG) An electronic program guide (EPG) is an on-screen guide to scheduled programs. It contains additional descriptive information, and enables a viewer to navigate, select and discover content
45、by time, title, channel, genre, etc., by using a remote control, keyboard, touchpad or even phone keypad. Generally, an EPG can be displayed in several layouts, such as mosaic EPG, box EPG, text EPG, mini EPG, tree EPG, etc., possibly depending on the service providers business model. Traditionally,
46、 in broadcast services, EPG service has been provided to enable end-users to easily browse television or live video content listings in an effort to easily find and select television content to view and/or record. According to todays typical use of the EPG service, an EPG is an on-screen guide used
47、to display scheduled broadcast television programs, allowing a viewer to navigate, select, and discover content by time, title, channel, genre, etc. In the future, IPTV services will support an EPG that will display all available content. In other service offerings detailed in this supplement, an EP
48、G is not relevant. On-demand services may use some form of content catalogue to enable easy browsing and selection of content, but this is not live content and an EPG would not be used in this “catalogue“ type of scenario. Also, an EPG may be an end-user interactive service, but it is not a bidirect
49、ional interactive service for end-user interaction with a server or headend. Figure 6-4 shows a use case of EPG service. 6 Y series Supplement 5 (05/2008) Figure 6-4 Use case of EPG 1) The content provider delivers the content to the service provider. 2) The end-user turns on the user terminal. 3) The service providers IPTV application retrieves the available service list for the user according to the service user profile. 4) The IPTV application delivers the list of available services and content to the en
