1、 International Telecommunication Union ITU-T H.248.60TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2009) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Identification of content of communication Recommendati
2、on ITU-T H.248.60 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 proce
3、dures 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 architecture for audiovisual and multimedia s
4、ervices 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 applicat
5、ions 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 inter-working procedures H.560H.569 BROADBAND, TRIP
6、LE-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 middleware H.730H.739 IPTV applicat
7、ion 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.248.60 (03/2009) i Recommendation ITU-T H.248.60 Gateway c
8、ontrol protocol: Identification of content of communication Summary Recommendation ITU-T H.248.60 defines an H.248 package to tag traffic of an individual H.248 stream/termination. Source Recommendation ITU-T H.248.60 was approved on 16 March 2009 by ITU-T Study Group 16 (2009-2012) under Recommenda
9、tion ITU-T A.8 procedures. ii Rec. ITU-T H.248.60 (03/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T
10、) 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 (WTSA), which meets every four yea
11、rs, 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 fall within ITU-Ts purview, the nece
12、ssary 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 Recommendation is voluntary. Howeve
13、r, 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 such as “must“ and the negative equ
14、ivalents 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 Recommendation may involve the use of a
15、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 approval of this Recommendation, ITU h
16、ad 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 patent database at http:/www.itu.i
17、nt/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. Rec. ITU-T H.248.60 (03/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined
18、in this Recommendation. 1 4 Abbreviations and acronyms 1 5 Conventions 1 6 Content of communication identity package for IP-based transport of content of communication . 2 6.1 Properties 2 6.2 Events . 2 6.3 Signals 2 6.4 Statistics 2 6.5 Error codes 2 6.6 Procedures 2 Appendix I Example protocol st
19、acks at content delivery interface 4 I.1 Default transport: IP-over-IP 4 I.2 Other encapsulation schemes . 4 Bibliography. 5 Rec. ITU-T H.248.60 (03/2009) 1 Recommendation ITU-T H.248.60 Gateway control protocol: Identification of content of communication 1 Scope This Recommendation allows a media g
20、ateway controller (MGC) to request a media gateway (MG) to label/tag the content of communication using an H.248 interface. The tag for a particular media flow is termed as content of communication identifier (CCID) as H.248 signalling element. The inclusion of the CCID information in those packets
21、is part of a dedicated encapsulation header. 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 Recommendation
22、s and other references are subject 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 publishe
23、d. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2005), Gateway control protocol: Version 3 plus Amendment 1 (2008). 3 Definitions 3.1 Terms defined elsewhere None. 3.2 T
24、erms defined in this Recommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations: CA (H.248) Control Association CC Content of Communication CCCI Content of Communication Control Interface CCID Content of Communication Identifier LCD LocalControl Descriptor
25、 MG Media Gateway MGC Media Gateway Controller SDU Service Data Unit UDP User Datagram Protocol 5 Conventions None. 2 Rec. ITU-T H.248.60 (03/2009) 6 Content of communication identity package for IP-based transport of content of communication Package Name: Content of Communication Identity Package P
26、ackage ID: cci (0x00d1) Description: This package enables the MGC to assign a correlation identifier for content of communication to a H.248 Termination/Stream. Version: 1 Extends: None. 6.1 Properties 6.1.1 Content of communication identifier Property Name: Content of Communication Identifier Prope
27、rty ID: ccid (0x0001) Description: This property corresponds to the correlation identifier for content of communication. Type: Double Possible values: Any value NOTE Profiles may further limit the value range and/or assign “special values“. Default: None. Defined in: LocalControl Characteristics: Re
28、ad/Write 6.2 Events None. 6.3 Signals None. 6.4 Statistics None. 6.5 Error codes None. 6.6 Procedures 6.6.1 General When traffic tagging is required for a media stream (of a bearer connection), the MGC sets the content of communication ID in the LocalControl descriptor (LCD) which is then passed to
29、the MG via a H.248 command. For each bearer packet received, the MG tags the packet with the correlation identifier for content of communication as the key. Appendix I provides some examples of possible forwarding methods. Rec. ITU-T H.248.60 (03/2009) 3 6.6.2 Example use case(s) This package may be
30、 applied to any kind of service that copies IP-based bearer traffic. Traffic copying may be, for instance, used for (but not limited to): a) online tests, with the limitation on a unidirectional traffic flow delivered towards a test equipment acting as traffic sink; b) online monitoring of traffic f
31、or QoS purposes (e.g., in case of particular performance metrics which may not be provided by the MG itself); c) simple and limited tracing capabilities of bearer traffic; NOTE Any advanced tracing service (e.g., as defined by b-ETSI TS 132 421, b-ETSI TS 132 422, b-ETSI TS 132 423) may benefit from
32、 the use of the 3GPP-defined H.248 trace package according to b-ETSI TS 129 232. d) access to intercepted bearer traffic. 4 Rec. ITU-T H.248.60 (03/2009) Appendix I Example protocol stacks at content delivery interface (This appendix does not form an integral part of this Recommendation) This append
33、ix provides examples for possible encapsulation methods. I.1 Default transport: IP-over-IP The original IP packet, either an IP version 4 or version 6 packet, shall be encapsulated in another IP packet. This is conceptually an IP-over-IP tunnelling method (like already known from correspondent techn
34、ologies like: “IP in IP encapsulation“ b-IETF RFC 2003, GRE (generic routing encapsulation) see b-IETF RFC 2784 or the GPRS terrestrial IP transport domain (with so-called GTP tunnels). The IP tunnel itself may again use either IP version 4 or version 6. UDP should be the default transport protocol
35、for the tunnel. The 4-byte word from the signalled ccid value shall be added in front of the original IP packet, which serves as a layer 4 service data unit (SDU) for the layer 4 tunnel protocol (e.g., the UDP payload in case of UDP). The mapping of ccid values to the 4-byte encapsulation header may
36、 be defined by a profile specification. The described IP-over-IP transport mechanism represents an “IP layering with additional encapsulation header“ tunnelling method. There would be a unique protocol layering per network domain, i.e., a unique content delivery interface type per H.248 media gatewa
37、y, and thus, per H.248 control association (CA). The applied protocol layering may be therefore defined by a profile specification using this package (or using provisioning). I.2 Other encapsulation schemes There may be other different possible protocol encapsulation schemes, like for instance: An a
38、pplication layer approach by using the ccid property value for the generation and insertion of digital signatures (on application layer) for the traffic at the content delivery interface; or even A non-IP-based packet-switched bearer technology for content delivery. This Recommendation does not limi
39、t other encapsulation alternatives; however, a mutual agreement between MGC and MG would be then required (which would be an H.248 profile specification using the cci package). Rec. ITU-T H.248.60 (03/2009) 5 Bibliography b-ETSI TS 129 232 ETSI TS 129 232 (2007), Universal Mobile Telecommunications
40、System (UMTS); Media Gateway Controller (MGC) Media Gateway (MGW) interface; Stage 3 (3GPP TS 29.232 version 7.7.0 Release 7). b-ETSI TS 132 421 ETSI TS 132 421 (2007), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS);Telecommunication manageme
41、nt; Subscriber and equipment trace; Trace concepts and requirements (3GPP TS 32.421 version 7.2.0 Release 7). b-ETSI TS 132 422 ETSI TS 132 422 (2007), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Telecommunication management; Subscriber a
42、nd equipment trace; Trace control and configuration management (3GPP TS 32.422 version 7.2.0 Release 7). b-ETSI TS 132 423 ETSI TS 132 423 (2007), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Telecommunication management; Subscriber and eq
43、uipment trace; Trace data definition and management (3GPP TS 32.423 version 7.4.0 Release 7). b-IETF RFC 2003 IETF RFC 2003 (1996), IP Encapsulation within IP. b-IETF RFC 2784 IETF RFC 2784 (2000), Generic Routing Encapsulation (GRE). Printed in Switzerland Geneva, 2009 SERIES OF ITU-T RECOMMENDATIO
44、NS Series A Organization of the work of 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
45、 Audiovisual and multimedia systems Series 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 elemen
46、ts of outside plant Series M Telecommunication 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
47、Series Q Switching and signalling Series 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
