ITU-T H 450 12-2001 Common Information Additional Network Feature for H 323 Series H Audiovisual and Multimedia Systems Supplementary Services for Multimedia (Study Group 16)《H 323.pdf

1、INTERNATIONAL TELECOMMUN KATION UN ION ITUWT TELECOMMUNICATION STANDARDIZATION SECTOR OF TU SER ES H: A DIOL SUAL hi- Dh 1 H.450.12 LTIMED Supplementary services for multimedia (07/200 1 ) A SYSTEMS Common Information Additional Network Feature for H.323 ITU-T Recommendation H.450.12 (Formerly CCITT

2、 Recommendation) INTERNATIONAL TELECOMMUNICATION UN ION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU H.450.12 (071200 1 ) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Supplementary services for multimedia Common Information Additional Network Feature for H.323 ITU-T Recommendation H.450.12

3、(Formerly CCIlT Recommendation) IT-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS INFRASTRUCTURE OF AUDIOVISUAL SERVICES General Transmission multiplexing and synchronization Systems aspects Communication procedures Coding of moving video Re

4、lated systems aspects SYSTEMS AND TERMiNAL EQUIPMENT FOR AUDIOVISUAL SERVICES SUPPLEMENTY SERVI-CES FOR MULTIMEDIA 1 I* * H.100-H.199 H.200-H.219 H.220-H.229 H.230-H.239 H.240-H.259 H.260-H.279 H.280-H.299 H.300-H.399 a H.450-H.499 I II Forfurther details, please refer to the list of ITU-T Recommend

5、ations. ITU-T Recommendation H.450.12 Common Information Additional Network Feature for H.323 Summary This Supplementary Service describes the procedures and the signalling protocol for the Common Information Additional Network Feature in ITU-T H.323 (Packet-based Multimedia Communications Systems)

6、networks. ANF-CMN enables the exchange of Common Information between ANF-CMN endpoints. This Common Information is a collection of miscellaneous information that relates to the user or equipment at one end of a connection and includes one or more of the following: Feature Identifiers, Party Category

7、. This Recommendation makes use of the “Generic functional protocol for the support of supplementary services in ITU-T H.323“ as defined in -T H.450.1. Source ITU-T Recommendation H.450.12 was prepared by ITU-T Study Group 16 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 July

8、2001. ITU-T H.450.12 (07/2001) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The IT Telecommunication Standardization Sector (IT-T) is a permanent organ of ITU. IT-T is responsible for studying technical, opera

9、ting 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 years, establishes the topics for study by the ITU-T study groups which, in turn, pr

10、oduce 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 necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In t

11、his Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS IT draws attention to the possibility that the practice or implementation of this Recommendation may involve

12、 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 IT members or others outside of the Recommendation development process. As of the date of approval of this Recommen

13、dation, IT had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU

14、 2002 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from IT. ii ITU-T H.450.12 (07/2001) CONTENTS 1 2 3 4 5 5.1 5.2 5.3 6 6.1 6.2 6.3 7 7.1 7.2

15、Scope . References . Terms and definitions . Abbreviations and acronyms ANF-CMN description . 5.1 . 1 Activatioddeactivatiodregistratiodinterrogation . 5.1.2 Invocation and operation . Exceptional procedures . Normal procedures 5.2.1 Invocation and Operation Interactions with other supplementary ser

16、vices 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.3.6 5.3.7 5.3.8 5.3.9 5.3.10 5.3.1 1 5.3.12 5.3.13 Call Transfer (SS-CT) . Call Forwarding Unconditional (SS-CFU) Call Forwarding Busy (SS-CFB) . Call Forwarding on No Reply (SS-CFNR) Call Hold Call ParWCall Pickup Call Waiting . Message Waiting Indication Name

17、Presentation . Completion of Calls on No Reply (SS-CCNR) . Completion of Calls on Busy Station (SS-CCBS) . Call Intrusion (SS-CI) Call Offer (SS-CO) Messages and information elements . Feature Identifier List . Feature values . 6.2.1 SS-CI protection level . 6.2.2 Party Category . Feature Control .

18、Procedures . Actions at User As Endpoint 7.1.1 Normal procedures 7.1.2 Exceptional procedures Actions at User Bs Endpoint 7.2.1 Normal procedures ITU-T H.450.12 (07/2001) 1 1 1 2 2 2 2 2 3 3 4 . 111 8 8.1 8.2 8.3 9 9.1 9.2 10 11 11.1 11.2 12 13 13.1 13.2 7.2.2 Exceptional procedures Primitives Commo

19、n Information Primitives Primitive defhitions . Parameter definitions Interworking and interactions . Protocol interaction between ANF-CMN and other supplementary services . Interworking with an SCN 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.2.6 9.2.7 9.2.8 9.2.9 Call Offer (SS-CO) 9.2.10 Call Intrusion (SS-CI

20、) Gatekeeper actions Dynamic description . Operational model and signal flows . 1 1.1.1 Operational model . 1 1.1.2 Example message sequence for normal operation of ANF-CMN for the solicited service . 1 1.1.3 Example message sequence for normal operation of ANF-CMN for the unsolicited service . Time

21、rs . 11.2.1 Timer T1 Operations in support of Common Information Network service Specification and Description Language (SDL) Diagrams for ANF-CMN . Behaviour of the endpoints using explicit primitive exchange . Call Transfer (ITU-T H.450.2) Call Diversion (ITU-T H.450.3) Call Hold (ITU-T H.450.4) C

22、all Park and Call Pickup (ITU-T H.450.5) Call Waiting (ITU-T H.450.6) . Message Waiting (ITU-T H.450.7) . Name Presentation (ITU-T H.450.8) . Call Completion (IT-T H.450.9) . Behaviour of the Endpoints using implicit application information exchange Page 8 9 9 9 9 10 10 10 10 10 11 11 11 11 11 11 11

23、 11 12 12 12 12 13 14 14 14 15 17 19 23 iv ITU-T H.450.12 (07/2001) ITU-T Recommendation H.450.12 Common Information Additional Network Feature for H.323 1 Scope This Recommendation describes supplementary services the Additional Network Feature Common Information (ANF-CMN), which is applicable to v

24、arious basic services supported by -T H.323 multimedia endpoints. ANF-CMN allows the exchange of Common Information between ANF-CMN endpoints. This Recommendation requires ITU-T H.323 version 2 (1998) or later. Version 2 products can be identified by ITU-T H.225.0 messages containing a protocolIdenW

25、ier = (itu-t (O) recommendation (O) h (8) 2250 version (O) 2) and ITU-T H.245 messages containing a protocolIdenMer = (itu-t (O) recommendation (O) h (8) 245 version (O) 3). 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text

26、, constitute provisions of the 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 investigate the possibility of applying the most recent edition of

27、the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T H.225.0 Version 4 (2000), Call signalling protocols and media stream packetization for packet-based multimedia communication systems. ITU-T H.245 Version 6 (2000),

28、 Control protocol for multimedia communication. ITU-T H.323 Version 4 (2000), Packet-based multimedia communications systems. ITU-T H.450.1 (1 998), Generic functional protocol for the support of supplementary services in H.323. ITU-T H.450.2 (1999, Call transfer supplementary service for H.323. ITU

29、-T H.450.3 (1998), Call diversion supplementary service for H.323. ITU-T H.450.4 (1999), Call hold supplementary service for H.323. ITU-T H.450.5 (1999), Call park and call pickup supplementary services for H.323. ITU-T H.450.7 (1999), Message waiting indication supplementary service for H.323. ITU-

30、T H.450.9 (2000), Call completion supplementary services for H. 323. ITU-T H.450.10 (2001), Call o#er supplementaly service for H.323. ITU-T H.450.11 (2001), Call intrusion supplementary service for H.323. Terms and definitions This Recommendation defines the following terms: 3.1 3.2 the other party

31、 in the call 3.3 Endpoint; gatekeeper; gateway; terminal; user: See ITU-T H.323. Forward Direction: The direction of the connection from the party invoking ANF-CMN to ITU-T H.323 Call: Refer to ITU-T H.323. ITU-T H.450.12 (07/2001) 1 3.4 with the gatekeeper. 3.5 3.6 3.7 Proxy: An entity that acts on

32、 behalf of an endpoint. The proxy may or may not be Co-located Reverse Direction: The direction opposite to the forward direction. User A: Originating user that originated the call or requested the additional network feature. User B: The remote user that was initially addressed. 4 Abbreviations and

33、acronyms This Recommendation uses the following abbreviations: ANF Additional Network Feature ANF-CMN ANF Common Information APDU Application Protocol Data Unit ASN. 1 E Information Element NFE Network Facility Extension SDL Specification and Description Language ss Supplementary Service Abstract Sy

34、ntax Notation one 5 ANF-CMN description ANF-CMN is an additional network feature that enables the exchange of Common Information between ANF-CMN endpoints. This Common Information is a collection of miscellaneous information that relates to the endpoint or equipment at one end of a connection and in

35、cludes one or more of the following: Feature Identifiers, Feature Values, or Feature Controls. This information, when received by an ANF-CMN endpoint, can be used for any purpose, e.g. as the basis for indications to the local user or to another network or in order to filter feature requests. A soli

36、cited and an unsolicited service can be offered to an ANF-CMN endpoint (which may be located at either end of a connection). The solicited service enables the ANF-CMN endpoint to request the Common Information fiom a peer ANF-CMN endpoint. The unsolicited service enables an ANF-CMN endpoint to suppl

37、y Common Information to a peer ANF-CMN endpoint. These services may be combined and are not mutually exclusive. 5.1 Normal procedures 5.1.1 Activatioddeactivatiodregistratiodinterrogation ANF-CMN is permanently activated. 5.1.2 Invocation and operation The conditions under which ANF-CMN is invoked i

38、s an implementation matter. Also, Common Information offered by an endpoint is an implementation matter. 2 ITU-T H.450.12 (07/2001) An ANF-CMN endpoint may invoke ANF-CMN at any time during a call a to send its own Common Information to the peer ANF-CMN endpoint (unsolicited service); to request the

39、 Common Information of the peer ANF-CMN endpoint (solicited service). a Sending and requesting the Common Information may be combined. NOTE - Typically, the Common Information is exchanged during the establishment phase of a call and after call rearrangement. On receiving a request for Common Inform

40、ation, the receiving ANF-CMN user shall respond with its Common Information. 5.2 Exceptional procedures 5.2.1 Invocation and Operation If no response is received on a request for Common Information (solicited service), the action to be taken shall be implementation dependent. 5.3 Interactions with o

41、ther supplementary services 5.3.1 Call Transfer (SS-CT) Common Information relating to the transferred endpoint and the transferred to end point may be sent as part of the transferred call establishment. Otherwise, the information shall be sent subsequent to the transfer. 5.3.2 Call Forwarding Uncon

42、ditional (SS-CFU) Common Information relating to the originating end of a call sent at the time of the call establishment request shall, if the call is diverted, be diverted to the ANF-CMN user at the terminating end of the diverted call. 5.3.3 Call Forwarding Busy (SS-CFB) Clause 5.3.2 shall apply.

43、 5.3.4 Unsolicited Common Information relating to the originating end of a call sent at the time of the call establishment request shall, if the call is diverted, be diverted to the ANF-CMN user at the terminating end of the diverted call. A request for solicited Common Information fiom the originat

44、ing end of a call sent at the time of the call establishment request shall not, if the call is diverted, be diverted to the ANF-CMN user at the terminating end of the diverted call. Call Forwarding on No Reply (SS-CFNR) 53.5 CallHold No interaction. 5.3.6 Call ParWCall Pickup Common Information rela

45、ting to tEe parked endpoint and the parked to endpoint may be sent as part of the parking call establishment. Otherwise, it shall be sent subsequent to Call Park. Common Information relating to the parked endpoint and the unparking endpoint may be sent as part of the unparking call establishment. Ot

46、herwise, it shall be sent subsequent to unpark. ITU-T H.450.12 (07/2001) 3 5.3.7 Call Waiting No interaction. 53.8 Message Waiting Indication The SS-MWI Callback call indicator should be sent when placing the Callback Call. 5.3.9 Name Presentation No interaction. 5.3.10 Completion of Cab on No Reply

47、 (SS-CCNR) No interaction. 5.3.11 Completion of Calls on Busy Station (SS-CCBS) No interaction. 5.3.12 Call Offer (SS-CO) No interaction. 5.3.13 Call Intrusion (SS-CI) If ANF-CMN is included prior to SS-CI invocation, the Call Intrusion Protection Level of the unwanted user is known, therefore the c

48、iGetCIPL.inv and ciGetCIPL.res APDU exchange is not required. Actual SS-CI actions are implementation dependent. 6 Messages and information elements The APDUs of the operations defined in clause 12 shall be conveyed within ITU-T H.450.1 Supplementary Service APDUs included in User-user information e

49、lements, as specified in The operations defined in Abstract Syntax Notation One (ASN. 1) in clause 12 shall apply. When conveying the invoke APDU of the operations defined in clause 12, the destinationEntity data element of the NFE shall contain the value endpoint. When conveying the invoke APDU of operation cmnInform the Interpretation APDU shall be included with the value discardAnyUnrecognizedInvokePdu. When conveying the invoke APDU of operation cmnRequest, the Interpretation APDU shall either be omitted or shall be included with the value rejectAnyUnrecognizedInvokePdu