1、INTERNATIONAL TELECOMMUNICATION UNION ITUmT TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2931 Amendment 3 (03199) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access signalling Digital subscriber signalling system No. 2 - User-network interface (UNI) laye
2、r 3 specification for basic calkonnection control Amendment 3 ITU-T Recommendation Q.2931 - Amendment 3 (Previously CCITT Recommendation) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesFor further details, please refer to ITU-T List of
3、 Recommendations. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesITU-T RECOMMENDATION Q.2931 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - USER-NETWORK INTERFACE (UNI) LAYER 3 SPECIFICATION FOR BASIC CALL/CONNECTION CONTROL AMENDMENT 3
4、Summary Recommendation 4.2931 provides basic call and connection control for point-to-point connections in a B-ISDN. This amendment has been prepared to allow the creation of Recommendation 4.2965.1 to contain all the information on the encoding of the quality of service parameter information elemen
5、t and the related procedures in a manner that is consistent with the second edition of Recommendation 1.356. This amendment is issued in conjunction with Recommendation 4.2965.1. Specifically, this amendment includes support for the following Recommendations: - ITU-T Recommendation 1.356 (1 996j, B-
6、ISDNATM layer cell transfer performance. - ITU-T Recommendation 4.2965.1 (1999), Digital subscriber signalling system Nu. 2 - Support of qualiv of service classes. l Source Amendment 3 to ITU-T Recommendation Q.2931 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Res
7、olution No. 1 procedure on the 15th of March 1999. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesFOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU
8、 Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The 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 Sta
9、ndardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution
10、 No. 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 this Recommendation the term recognized operating agency (ROA) includes any individual, company, corporation or governmental organ
11、ization that operates a public correspondence service. The terms Administration, ROA andpublic correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation
12、may involve the use of a claimed Intellectual Property Right. The 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
13、of this. Recommendation, the ITU had-mt 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 p
14、atent database. O ITU 1999 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 the ITU. COPYRIGHT International Telecommunications Union/ITU Tele
15、communicationsLicensed by Information Handling ServicesIntroduction This amendment has been prepared to allow the creation of Recommendation Q.2965.1 to contain all the information on the encoding of the quality of service parameter information element and the related procedures in a manner that is
16、consistent with the second edition of Recommendation 1.356. This amendment is issued in conjunction with Recommendation 4.2965.1. Specifically, this amendment includes support for the following Recommendations: - ITU-T Recommendation 1.356 (1 996), B-ISDN ATM layer cell transfer performance. - ITU-T
17、 Recommendation Q.2965.1 (1999), Digital subscriber signalling system No. 2 - Support of quality of service classes. NOTE - This amendment to ITU-T Recommendation 4.293 1 does not include an explicit modification of the reference list in Annex J/Q.2931. It is expected that a future amendment or revi
18、sion of Recommendation Q.293 1 will include the following additions to the list of references: - ,. ITU-T Recommendation 1.356 (1 996), B-ISDNATM layer cell transfer performance. ITU-T Recommendation 4.2965.1 (1 999), Digital subscriber signailing system No. 2 - Support of quality of service classes
19、. 1 (+I.: - I l Recommendation Q.293UAmd.3 (03/99) iii , COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesRecommendation Q.2933 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO, 2 - USER-NETWORK INTERFACE (UNI) LAYER 3 SPECIFICATION FOR BASIC CAL
20、L/CONNECTION CONTROL . AMENDMENT 3 (Geneva, 1999) 1) Subclause 4.5.18 - Quality of service parameter Replace the contents of the subclause (including Figure 4-24iQ.2931 and Table 4-1WQ.2931) with: See Recommendation 4.2965.1. 2) Subclause 5.1.3 - QoS and traffic parameter selection procedures Replac
21、e the entire contents with the following text: For the handling of traffic parameters in combination with QoS class, see 9. UQ.2965.1. The user shall indicate the requested peak cell rate in the ATM traffic descriptor information element. If the network is able to provide the requested peak cell rat
22、e, the network shall progress the call to the called user. If the network is not able to provide the requested peak cell rate, the network shall reject the call, returning a RELEASE COMPLETE message with cause No. 37, “user cell rate unavailable“. 3) Subclause 5.2.4 - QoS and traffic parameter selec
23、tion procedures Replace the entire contents with the following text: For the handling of traffic parameters in combination with QoS class, see 9.2/Q.2965.1. The cumulative end-to-end transit delay is indicated in the end-to-end transit delay information element. If the user is not able to accept the
24、 indicated end-to-end transit delay, the user shall reject the call, returning a RELEASE COMPLETE message with cause No. 49, “Quality of Service unavailable“. The network shall indicate the peak cell rate in the ATM traffic descriptor information element. If the user is not able to provide the indic
25、ated peak cell rate, the user shall reject the call, returning a RELEASE COMPLETE message with cause No. 47, llresource unavailable, unspecified“, COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesCOPYRIGHT International Telecommunication
26、s Union/ITU TelecommunicationsLicensed by Information Handling Services;cries A ;cries B ieries C ;eries D ;cries E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU-
27、T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication se
28、rvices Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and
29、other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission q
30、uality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 1999 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services
