1、 International Telecommunication Union ITU-T H.450.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2011) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Supplementary services for multimedia Generic functional protocol for the support of supplementary services
2、 in ITU-T H.323 systems Recommendation ITU-T H.450.1 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 asp
3、ects 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 service architectu
4、re for audiovisual and multimedia services H.360H.369 Supplementary services for multimedia H.450H.499MOBILITY 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.519 Mobile
5、 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-working pr
6、ocedures 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 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV
7、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 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.450.1 (05/2011) i Recom
8、mendation ITU-T H.450.1 Generic functional protocol for the support of supplementary services in ITU-T H.323 systems Summary Recommendation ITU-T H.450.1 describes the procedures and the signalling protocol between ITU-T H.323 entities (packet-based multimedia communications systems) for the control
9、 of supplementary services. The signalling protocol which is defined within this Recommendation is common to all ITU-T H.323 supplementary services. Detailed procedures applicable to individual supplementary services are specified by other Recommendations of the ITU-T H.450.x-series and by individua
10、l manufacturers for proprietary services using the capabilities defined in this Recommendation. The procedures of this Recommendation are derived from the generic functional protocol specified in ISO/IEC 11582 for private integrated services networks (PISN). The revision approved in May 2011 correct
11、s errors discovered in the initial publication. History Edition Recommendation Approval Study Group 1.0 ITU-T H.450.1 1998-02-06 16 2.0 ITU-T H.450.1 2011-05-14 16 ii Rec. ITU-T H.450.1 (05/2011) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the
12、 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 issuing Recommendations on them with a view to standa
13、rdizing 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 cov
14、ered 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 expression “Administration“ is used for conciseness to indi
15、cate 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) and compliance with the Recommendation is achiev
16、ed 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 Recommendation is required of any party. INTELLECTUAL P
17、ROPERTY 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 claimed Intellectual Property Rights, whether ass
18、erted 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 Recommendation. However, implementers are cautioned
19、 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 2012 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU.
20、Rec. ITU-T H.450.1 (05/2011) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Terms and definitions . 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 3 5 General principles . 3 6 Procedures for the transport of APDUs 3 6.1 Call-related
21、procedures . 3 6.2 Call-independent procedures 4 6.3 Sending the ITU-T H.450.1 supplementary service APDU . 4 6.4 Receiving the ITU-T H.450.1 supplementary service APDU 4 6.5 Actions at a source entity . 5 6.6 Actions at a destination entity 5 7 Messages . 6 7.1 Overview 6 7.2 SETUP 6 8 ITU-T H.450.
22、1 supplementary service APDU . 7 8.1 Network facility extension (NFE) 9 8.2 Interpretation APDU 9 8.3 ROS APDUs . 9 9 Encoding of information described using ASN.1 . 14 10 ASN.1 definitions of generic parameters 14 10.1 Addressing information 14 10.2 H225InformationElement . 16 10.3 General error li
23、st . 16 11 Manufacturer-specific information . 17 11.1 Manufacturer-specific operations . 17 11.2 Manufacturer-specific additions to standardized operations 18 12 Object identifiers defined in this Recommendation . 19 Rec. ITU-T H.450.1 (05/2011) 1 Recommendation ITU-T H.450.1 Generic functional pro
24、tocol for the support of supplementary services in ITU-T H.323 systems 1 Scope This Recommendation defines the signalling protocol between ITU-T H.323 entities for the control of supplementary services. Detailed procedures applicable to individual supplementary services are specified by other Recomm
25、endations of the ITU-T H.450.x-series and by individual manufacturers for proprietary services using the capabilities defined in this Recommendation. The procedures of this Recommendation are derived from the generic functional protocol specified in ISO/IEC 11582 for private integrated services netw
26、orks (PISN). 2 References The following ITU-T Recommendations and other references 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 subje
27、ct to revision; users of this Recommendation are therefore encouraged to investigate 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 w
28、ithin this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T H.225.0 Recommendation ITU-T H.225.0 (2009), Call signalling protocols and media stream packetization for packet-based multimedia communication systems. ITU-T H.245 Recommendation ITU-T H.245
29、 (2009), Control protocol for multimedia communication. ITU-T H.323 Recommendation ITU-T H.323 (2009), Packet-based multimedia communications systems. ITU-T I.112 Recommendation ITU-T I.112 (1993), Vocabulary of terms for ISDNs. ITU-T I.210 Recommendation ITU-T I.210 (1993), Principles of telecommun
30、ication services supported by an ISDN and the means to describe them. ITU-T X.680 Recommendation ITU-T X.680 (1994) | ISO/IEC 8824-1:1995, Information technology Abstract Syntax Notation One (ASN.1) Specification of basic notation. ITU-T X.680 Amd.1 Recommendation ITU-T X.680 (1994)/Amd.1 (1995) | I
31、SO/IEC 8824-1:1995/Amd.1:1996, Information technology Abstract Syntax Notation One (ASN.1) Specification of basic notation Amendment 1: Rules of extensibility. ITU-T X.681 Amd.1 Recommendation ITU-T X.681 (1994)/Amd.1 (1995) | ISO/IEC 8824-2:1995/Amd.1:1996, Information technology Abstract Syntax No
32、tation One (ASN.1) Information object specification Amendment 1: Rules of extensibility. ITU-T X.691 Recommendation ITU-T X.691 (1995) | ISO/IEC 8825-2:1996, Information technology ASN.1 encoding rules Specification of Packed Encoding Rules (PER). 2 Rec. ITU-T H.450.1 (05/2011) ITU-T X.880 Recommend
33、ation ITU-T X.880 (1994) | ISO/IEC 13712-1:1995, Information technology Remote Operations: Concepts, model and notation. ISO/IEC 11582 ISO/IEC 11582:2002, Information technology Telecommunications and information exchange between systems Private Integrated Services Network Generic functional protoco
34、l for the support of supplementary services Inter-exchange signalling procedures and protocol. 3 Terms and definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 object identifier: ITU-T X.680. 3.1.2 ITU-T H.323 entity: ITU-T H.323. 3.1.3 servic
35、e: ITU-T I.112. 3.1.4 signalling: ITU-T I.112. 3.1.5 supplementary service: Clause 2.4 of ITU-T I.210. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 application protocol data unit (APDU): A sequence of data elements exchanged between peer application
36、 layer entities, e.g., remote operations service (ROS) APDUs. 3.2.2 call independent: A property of information which is conveyed in a message which does not use the call reference of a call. 3.2.3 call independent signalling connection: A signalling connection established between SS-Control entitie
37、s located in different ITU-T H.323 entities for the exchange of call independent signalling information. 3.2.4 call related: A property of information which is conveyed in a message which uses the call reference of a call. 3.2.5 destination entity: In the context of a single one-way exchange of info
38、rmation between two SS-Control entities, the ITU-T H.323 entity where the receiving SS-Control entity is located. 3.2.6 ITU-T H.450.1 supplement service APDU: A specific APDU defined by Recommendation ITU-T H.450.1. 3.2.7 interpretation APDU: A specific APDU defined by Recommendation ITU-T H.450.1.
39、3.2.8 invocation: A request by a SS-Control entity to perform an operation in a remote SS-Control entity. 3.2.9 mistyped: A property of an application protocol data unit (APDU) whose structure does not conform to the structure defined in Recommendation ITU-T H.450.1 or the structure defined for a pa
40、rticular supplementary service. 3.2.10 ROS APDU: An APDU defined by the remote operations service (ROS). 3.2.11 source entity: In the context of a single one-way exchange of information between two SS-Control entities, the ITU-T H.323 entity where the sending SS-Control entity is located. Rec. ITU-T
41、 H.450.1 (05/2011) 3 3.2.12 supplementary service control (SS-Control) entity: An entity that exists within an ITU-T H.323 entity and provides the procedures associated with the support of a particular supplementary service. 3.2.13 unrecognized: A property of a message, information element, APDU or
42、operation value whose type identifier is not one supported by the destination entity. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations: APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation One LAN Local Area Network MSI Manufacturer-Specific Information
43、 NFE Network Facility Extension PISN Private Integrated Services Network RAS Registration, Admission and Status ROS Remote Operations Service SS Supplementary Service 5 General principles The generic functional protocol defined in this Recommendation provides the means to exchange signalling informa
44、tion for the control of supplementary services over a LAN. It does not by itself control any supplementary service but rather provides generic services to specific SS-Control entities. Procedures for individual supplementary services based on these generic procedures are defined in other Recommendat
45、ions of the ITU-T H.450.x-series or may be manufacturer-specific. The generic functional protocol operates in conjunction with the call signalling protocol defined in ITU-T H.225.0. The generic functional protocol provides mechanisms for the support of supplementary services which relate to existing
46、 ITU-T H.323 calls or are entirely independent of any existing ITU-T H.323 calls. In performing a supplementary service, whether call independent or call related, use is made of the information transfer procedures specified below. Supplementary service operations require an association between the r
47、espective peer SS-Control entities. This association is achieved implicitly by the transport connection used for call signalling. SS-Control entities use the services of the remote operations service (ROS). The remote operations service (ROS) for ITU-T H.323 is defined in clause 8.3 and based on ITU
48、-T X.880. 6 Procedures for the transport of APDUs 6.1 Call-related procedures For the call-related transport of ITU-T H.450.1 supplementary service application protocol data units (APDUs), the call signalling channel and call reference of the call to which the APDU relates shall be used. APDUs shall
49、 be conveyed in the User-user information element which shall be handled according to clauses 6.3 and 6.4. 4 Rec. ITU-T H.450.1 (05/2011) Gatekeeper procedures and RAS messages, as defined in ITU-T H.225.0, shall apply to calls that transport ITU-T H.450.1 supplementary service APDUs. 6.2 Call-independent procedures For the call-independent transport of ITU-T H.450.1 supplementary service APDUs, the call signalling procedures of ITU-T H.225.0 shall be used to establish a call
