1、 International Telecommunication Union ITU-T H.621TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2008) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSBroadband and triple-play multimedia services Advanced multimedia services and applications Architecture of a system for multimedia information acce
2、ss triggered by tag-based identification Recommendation ITU-T H.621 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.
3、229 Systems aspects H.230H.239 Communication 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 ser
4、vice architecture for audiovisual and multimedia services H.360H.369 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
5、.510H.519 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.559Mobile multimedia collaboration i
6、nter-working procedures H.560H.569 BROADBAND AND TRIPLE-PLAY MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729
7、For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.621 (08/2008) i Recommendation ITU-T H.621 Architecture of a system for multimedia information access triggered by tag-based identification Summary Recommendation ITU-T H.621 defines the system architecture for the
8、multimedia information access triggered by tag-based identification on the basis of Recommendation ITU-T F.771, and serves as a technical introduction to subsequent definition of detailed system components and protocols. The services treated by this Recommendation provide the users with a new method
9、 to refer to the multimedia content without typing its address on a keyboard or inputting the name of objects about which relevant information is to be retrieved. This is one of the major communication services using identification (ID) tags such as radio frequency identifications (RFIDs), smart car
10、ds and barcodes. International standardization of these services will give a big impact to international multimedia information services using ID tags. It contains the functional model, its constituent components as well as its workflow. An appendix describes how this architecture realizes typical s
11、ervices. Source Recommendation ITU-T H.621 was approved on 6 August 2008 by ITU-T Study Group 16 (2005-2008) under Recommendation ITU-T A.8 procedure. Keywords Multimedia information access, tag-based identification. ii Rec. ITU-T H.621 (08/2008) FOREWORD The International Telecommunication Union (I
12、TU) 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, operating and tariff questions and is
13、suing 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 turn, produce Recommendations on these t
14、opics. 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. NOTE In this Recommendation, the expressi
15、on “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 e.g. interoperability or applicability)
16、 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 suggest that compliance with the Recomm
17、endation 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 evidence, validity or applicability of
18、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 not received notice of intellectual property, protected by patents, which may be required to implement this Re
19、commendation. 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 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoev
20、er, without the prior written permission of ITU. Rec. ITU-T H.621 (08/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 4 Abbreviations and acronyms 1 5 Conventions 2 6 System functional architecture . 3 6.1 Functional components. 3 6.2 Protocols. 5 6.3
21、General workflow. 5 Appendix I Examples of physical level architecture 7 I.1 Configuration example of physical level architecture 7 I.2 Components 7 I.3 Implementation examples of narrow area communication between ID tag and ID terminal. 8 I.4 Distributed implementation of ID resolution server. 10 A
22、ppendix II Workflow examples for multimedia information access triggered by tag-based identification. 12 II.1 Location-aware multimedia information service 12 II.2 Multimedia information download via posters service 13 II.3 u-Museum. 14 II.4 Business card with personal identifier 15 II.5 Presence se
23、rvice with multimedia information 16 Bibliography. 18 iv Rec. ITU-T H.621 (08/2008) Introduction This Recommendation defines the system architecture for multimedia information access triggered by tag-based identification and serves as a technical introduction to subsequent specifications of detailed
24、 system components and protocols. It contains the functional model, its constituent components as well as its workflow. An appendix describes how this architecture realizes typical services. Rec. ITU-T H.621 (08/2008) 1 Recommendation ITU-T H.621 Architecture of a system for multimedia information a
25、ccess triggered by tag-based identification 1 Scope This Recommendation defines the following issues to cover multimedia information access services triggered by tag-based identification as defined in ITU-T F.771: a functional architecture reference model with descriptions of corresponding elements;
26、 interface protocols between communication elements; and a generic work flow to support multimedia information access triggered by tag-based identification. Moreover, this Recommendation describes implementation examples with work flows. 2 References The following ITU-T Recommendations and other ref
27、erences 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 therefore encouraged to in
28、vestigate 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-alone document, the
29、status of a Recommendation. ITU-T F.771 Recommendation ITU-T F.771 (2008), Service description and requirements for multimedia information access triggered by tag-based identification. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 ID
30、resolution: ITU-T F.771. 3.1.2 ID tag: ITU-T F.771. 3.1.3 ID terminal: ITU-T F.771. 3.1.4 identifier: ITU-T F.771. 3.1.5 multimedia information: ITU-T F.771. 3.1.6 multimedia information delivery function: ITU-T F.771. 3.1.7 real-world entity: ITU-T F.771. 3.1.8 tag-based identification: ITU-T F.771
31、. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: 2D Two Dimensional 3D Three Dimensional 2 Rec. ITU-T H.621 (08/2008) 3G Third Generation wireless systems CD Compact Disk DNS Domain Name Server DVD Digital Versatile Disk GW GateWay HTTP HyperText Tran
32、sfer Protocol ID Identification IDR Identification Resolver IDT Identification Terminal IP Internet Protocol IR Infrared IRS Identification Resolution Server MIDF Multimedia Information Discovery Function MIDS Multimedia Information Delivery Server MIHF Multimedia Information Handling Function MIM M
33、ultimedia Information Manager MMS Multimedia Messaging Service NFC Near Field Communication NGN Next Generation Network P2P Peer to Peer PDA Personal Digital Assistant RF Radio Frequency RFID Radio Frequency Identification R/W Reader/Writer SB Service Broker SIM Subscriber Identity Module SMS Short
34、Message Service URL Uniform Resource Locator WAP Wireless Application Protocol Wi-Fi Wireless Fidelity 5 Conventions In this Recommendation: The expression “is required to“ indicates a requirement which must be strictly followed and from which no deviation is permitted if conformance to this Recomme
35、ndation is to be claimed. Rec. ITU-T H.621 (08/2008) 3 The expression “is recommended“ indicates a requirement which is recommended but which is not absolutely required. Thus this requirement need not be present to claim conformance. The expression “can optionally“ indicates an optional requirement
36、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 by the network operator/service provider. Rather, it means the vendor may optionally provide the
37、 feature and still claim conformance with the specification. 6 System functional architecture This clause defines the functional architecture of multimedia information access systems in which the multimedia information access is triggered by tag-based identification. This architecture is based on th
38、e system components described in clause 6 of ITU-T F.771 and shown in Figure 1. Compared with the high-level functional architecture, this system architecture decomposes each component into more detailed functional components. UserMultimedia information handling functionMultimedia information discov
39、ery functionID tag R/WID terminalWide areapublic communicationMultimediainformationmanagerID resolverNarrow area communicationoroptical data captureService broker(ID resolution)ID resolution functionIdentifierID tagMultimedia information delivery functionService broker(Multimedia information deliver
40、y)Figure 1 Functional architecture Figure 1 shows the logical functional architecture. This does not show the physical implementation of each high-level functional component. Examples of corresponding physical level architecture and their implementation are described in Appendix I. 6.1 Functional co
41、mponents The system functional architecture for multimedia access triggered by tag-based identification is required to include the following components: ID tag, ID tag reader/writer (ID tag R/W, in short), multimedia information discovery function (MIDF), multimedia information handling function (MI
42、HF), service broker (SB), ID resolver (IDR), and multimedia information manager (MIM). ID tag R/W, MIDF, and MIHF are sub-components included in an ID terminal. The IDR and SB are sub-components included in an ID resolution function. The MIM and SB are sub-components 4 Rec. ITU-T H.621 (08/2008) inc
43、luded in a multimedia information delivery function. Refer to clause 6 of ITU-T F.771 regarding narrow area communication and wide area public communication. 6.1.1 ID tag An ID tag is required to store identifier(s) which can be read by an ID tag R/W in an ID terminal via narrow area communication.
44、It can optionally store multimedia information and/or other data that is used in ID resolution and/or multimedia information presentation. Typical examples of ID tags are RFID, smartcard, infrared tag, barcode, 2D barcode, NFC listening device, etc. 6.1.2 ID terminal An ID terminal is required to be
45、 composed of three sub-components: 1) ID tag R/W; 2) multimedia information discovery function (MIDF); and 3) multimedia information handling function (MIHF). It can optionally contain multimedia information and/or other data. This data, such as a users profile, can be used in ID resolution and/or m
46、ultimedia information presentation. 6.1.2.1 ID tag R/W An ID tag R/W is required to provide communication interfaces to an ID tag, and read a single or multiple identifier(s) as well as application data from the ID tag. After reading the identifiers, it sends their information to the MIDF. An ID ter
47、minal can optionally contain multiple ID tag R/Ws. 6.1.2.2 Multimedia information discovery function (MIDF) A multimedia information discovery function (MIDF) is required to obtain the identifier from an ID tag R/W, and issues queries to the IDR or optionally the SB, depending on implementations, vi
48、a wide area public communication. It uses the identifier as a query key in both cases. The ID resolver returns pointer information (e.g., URL) to access the MIM providing the multimedia information delivery services. After obtaining the pointer information, it sends the information to the MIHF. 6.1.
49、2.3 Multimedia information handling function (MIHF) A multimedia information handling function (MIHF) is required to provide a function to download multimedia information from the MIM, and presents the information to the user. It can optionally upload information to the MIM. 6.1.3 Service broker (SB) A service broker can optionally provide ID resolution services with the help of an ID resolver. When an ID terminal sends an identifier to the SB, it consults the ID resolver for resolution of the identifier, discovers the mul
