1、 International Telecommunication Union ITU-T H.248.18TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2013) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Package for support of multiple profiles Recommendation
2、 ITU-T H.248.18 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 Communication procedu
3、res H.240H.259Coding 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 audiovisual and multimedia serv
4、ices 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.510H.519 Mobile multimedia collaboration application
5、s 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 procedures H.560H.569 BROADBAND, TRIPLE
6、-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 APPLICATIONS FOR IPTV General aspects H.700H.719 IP
7、TV 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 For further details, please refer to the list
8、 of ITU-T Recommendations. Rec. ITU-T H.248.18 (03/2013) i Recommendation ITU-T H.248.18 Gateway control protocol: Package for support of multiple profiles Summary Recommendation ITU-T H.248.18 describes a package to enable the media gateway controller (MGC) to determine which profiles are supported
9、 on a media gateway. It also allows the MGC to set the profiles that it shall use. This revision incorporates a correction to the error code number for “Unsupported or Unknown Profile“ to avoid duplication with Recommendation ITU-T H.248.26. History Edition Recommendation Approval Study Group 1.0 IT
10、U-T H.248.18 2002-11-29 16 2.0 ITU-T H.248.18 2013-03-16 16 ii Rec. ITU-T H.248.18 (03/2013) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunicat
11、ion 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 telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (
12、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 the procedure laid down in WTSA Resolution 1. In some areas of information technology which fal
13、l 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 indicate both a telecommunication administration and a recognized operating agency. Compliance with this Re
14、commendation is voluntary. However, 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
15、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 PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recom
16、mendation 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 others outside of the Recommendation development process. As of the date of app
17、roval 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 that this may not represent the latest information and are therefore strongly urged to consult the TSB
18、 patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2013 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.248.18 (03/2013) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 1 4 Ab
19、breviations and acronyms 1 5 Profile Package . 1 5.1 Properties 2 5.2 Events . 2 5.3 Signals 2 5.4 Statistics 2 5.5 Procedures 2 5.6 Error codes 3 Rec. ITU-T H.248.18 (03/2013) 1 Recommendation ITU-T H.248.18 Gateway control protocol: Package for support of multiple profiles 1 Scope This Recommendat
20、ion describes a package to enable the media gateway controller (MGC) to determine what profiles are supported on a media gateway. It also allows the MGC to set the profiles that it shall use. The support of this package is optional. 2 References The following ITU-T Recommendations and other referenc
21、es 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 investi
22、gate 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 statu
23、s of a Recommendation. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2013), Gateway control protocol: Version 3. 3 Definitions None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: MG Media Gateway MGC Media Gateway Controller 5 Profile Package Package n
24、ame: Profile Package Package ID: prp (0x0050) Description: This Recommendation describes a package to enable the media gateway controller to determine what profiles are supported on a media gateway. Profiles are described in ITU-T H.248.1. The property in this package shall only be implemented on th
25、e Root termination. Version: 1 Designed to be extended only: No Extends: None 2 Rec. ITU-T H.248.18 (03/2013) 5.1 Properties 5.1.1 Profiles supported Property name: Profiles Supported Property ID: Prof_supp (0x0001) Description: This property indicates the profile/s and versions supported by the med
26、ia gateway. This property is for the Root termination. Type: sub-list of string (Length 1 67 characters 64 for name, 1 for “/“ and 2 for version) Possible values: As per profile the name and version registered with IANA. The Name shall be encoded first followed by a slash “/“ following by a string e
27、ncoding of the version number. e.g., fred/1 NOTE The name “AuditProfiles“ is reserved for the MG to indicate to the MGC via a ServiceChange that it should audit the MG. The value “AuditProfiles“ shall not be returned when this property is audited. The name “NoProfile“ is reserved to indicate that th
28、e MG or MGC does not support any profiles. Defined in: Termination State Descriptor Characteristics: Read/Write 5.2 Events N/A 5.3 Signals N/A 5.4 Statistics N/A 5.5 Procedures If the MG wants to inform the MGC that it supports multiple profiles, it shall indicate this with ServiceChange Profile = “
29、AuditProfiles“. It may indicate this in an initial ServiceChange or at any time after this. Once the MGC receives ServiceChange Profile = “AuditProfiles“ the MGC should do an Audit Capabilities command on the “Prof_supp“ property of the Root termination. The MG shall then return all profiles that ca
30、n be supported by that MG. Rec. ITU-T H.248.18 (03/2013) 3 Figure 1 presents an example signalling sequence: H.248.18_fig1MGMGC(1) ServiceChange.req(Ctxt=all,Tid=root,Profile=Audit_Profiles)(3) AudCap.req(Ctxt=all,Tid=root,TermStateDes(Prof_supp)(2) ServiceChange.reply(4) AudCap.reply(Ctxt=all,Tid=r
31、oot,TermStateDes(Prof_supp= koala/1,wombat/2)Figure 1 Example profile determination sequence The MGC may set the Prof_supp property using a Modify command to indicate the profile/s that it will use on the MG. The MGC shall use one or more of the profiles that the MG indicated in an AuditCapability o
32、f the Prof_supp property. If the MGC tries to set the Prof_supp property on the MG to a profile value that is unknown by the MG, at the first unknown profile the MG shall reply with error code 461 “Unsupported or Unknown Profile“. If the Prof_supp property is not set by the MGC then it shall be assu
33、med that the MGC supports all the profiles supported by MG and that the MGC can use functionalities/capabilities of any of the profiles. NOTE This aligns with the ServiceChange procedure where by the MGC may indicate which profile it supports. An Audit value command may be used to determine the prof
34、ile/s that have been set. 5.6 Error codes This package defines a new error code: #:461 Name: Unsupported or Unknown Profile Definition: The Profile Name is not supported by the receiver. The command related to the unknown profile is disregarded. Package: Profile Package prp (0x0050) Reference: H.248
35、.18 Error Text in the error Descriptor: The Profile Name is included in the error text in the error descriptor. String Length 1 to 67 characters 64 for name, 1 for “/“ and 2 for version. Comment: Printed in Switzerland Geneva, 2013 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of
36、 ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Ser
37、ies I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M Telecommun
38、ication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Terminals and subjective and objective assessment methods Series Q Switching and signalling Serie
39、s R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
