1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TEL ECOMM U N I CATI ON STANDARDIZATION SECTOR OF ITU Q.2965.1 Amendment 1 (06/2000) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access Sig n al I i ng Digital subscriber signalling system No. 2 - Support of Quality
2、 of Service classes Amendment I ITU-T Recommendation Q.2965.1 - Amendment I (Formerly CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING I SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCTIONS AND WORMATION FLOWS FOR SERVICES IN THE ISDN CLAUSES APPLICABLE TO ITU-T STAN
3、DARD SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 43 INTERFACE DIGITA
4、L SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORIUNG General aspects Signalling ATM adaptation layer (SAAL) S
5、ignalling network protocols Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking B-ISDN application protocols for the network signalling B otocols for access Sig Q. 1-4.3 4.4-4.59 4.60-4.99 Q.100-Q.119 Q. 120-4.249 4.25 0-4.3 09 4.3 10-4.399 4.
6、400-4.499 4.500-4.599 4.600-4.699 Q.700-4.799 Q.800-Q.849 Q.850-Q.999 Q. 1000-Q. 1099 Q. 1 100-4. 1 199 Q.1200-4.1699 Q.1700-4.1799 4.2000-4.2999 4.2000-4.2099 4.2100-4.2199 4.2200-4.2299 Q.2600-4.2699 4.2700-4.2899 Q.290O-Q.2999 For further details, please refer to the list of ITU-T Recommendations
7、. ITU-T Recommendation Q.2965.1 Digital subscriber signalling system No. 2 - Support of Quality of Service classes AMENDMENT 1 Summary Recommendation Q.2965.1 (03/99) covers the support of quality of service classes in a B-ISDN. This amendment of Recommendation 4.2965.1 has been prepared to provide
8、alignment with the third edition of Recommendation 1.356 (2000). In particular, this amendment allows the support of explicit signalling of the 1.356 QoS class 5 in addition to the capabilities already provided in Recommendation 4.2965.1 (1 999). Source Amendment 1 to ITU-T Recommendation 4.2965.1 w
9、as prepared by ITU-T Study Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 15 June 2000. FOREWORD The International Telecommunication Union (TTU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (
10、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 Conference (WTSC), which meets every f
11、our 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 WTSC Resolution 1. In some areas of information technology which fall within ITU-Ts purview, t
12、he necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention
13、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 asserted by ITU members or others outs
14、ide 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, implementors are cautioned that this may not represent the la
15、test information and are therefore strongly urged to consult the TSB patent database. O ITU 2001 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 f
16、rom ITU. Introduction This amendment of Recommendation 4.2965.1 has been prepared to provide alignment with the third edition of Recommendation 1.356 (2000). In particular, Recommendation 4.2965.1 (1 999) is amended in order to: - refer to the Edition 3 of Recommendation 1.356 (2000); - support the
17、explicit signalling of 1.356 QoS class 5; - refer to the U Class as the 1.356 QoS class 4; - include in Annex NQ.2965.1 the valid combinations associated with the 1.356 QoS class 5. ITU-T Recommendation Q.2965.1 Digital subscriber signalling system No. 2 - Support of Quality of Service classes AMEND
18、MENT 1 The following list of amendments apply to Recommendation 4.2965.1 (03/1999): 1) Clause 2/Q.2965.1, Normative References Change reference I to: 11 2) Change Table I as follows: ITU-T 1.356 (2000), B-ISDN ATM layer cell transfer performance. Clause 8.1/Q.2965.1, Quality of service parameter Tab
19、le UQ.2965.1- QoS parameter information element QoS class forward (Octet 5) Bits 87654321 00000000 00000001 00000010 0000001 1 00000100 00000 1 o 1 11111111 Reserved (Note 3) All other values are reserved. No specific QoS class explicitly requested (Note 1) Class 1 (stringent class) (Note 2) Class 2
20、 (tolerant class) (Note 2) Class 3 (bi-level class) (Note 2) Class 4 (U class) (Note 2) Class 5 (stringent bi-level class) (Note 2) QoS class backward (Octet 6) Bits 87654321 00000000 0000000 1 00000010 0000001 1 00000100 00000 1 o 1 11111111 Reserved (Note 3) All other values are reserved. No speci
21、fic QoS class explicitly requested (Note 1) Class 1 (stringent class) (Note 2) Class 2 (tolerant class) (Note 2) Class 3 (bi-level class) (Note 2) Class 4 (U class) (Note 2) Class 5 (stringent bi-level class) (Note 2) NOTE 1 - When used, the network shall provide and guarantee a quality of service c
22、ompatible and consistent with the requirements indicated in the broadband bearer capability. In this case, the QoS to be provided is the implicitly requested QoS class associated to the requested ATM transfer capability (e.g. see ITU-T Q.2961.2 4, 4.2961.3 6, 4.2961.4 171, 4.2961.6 SI or Q.2934 9).
23、NOTE 2 -This QoS class is defined in ITU-T 1.356 i. NOTE 3 - This value is reserved to promote backward compatibility with the first edition of 4.293 1 (1 995). 3) Annex A Replace the entire Annex A/Q.2965. I with the following text: Broadband bearer capability Bearer class ANNEX A A, X, FR or VP A,
24、 X, FR or VP Valid combinations of bearer class, broadband transfer capability, ATM traffic descriptor parameters and QoS classes SCR, MBS (CLP = O + 1) Signalled QoS class Requested 1.371 SI ATC Explicitly Requested I356 I QoS class The parameters specified in the broadband bearer capability inform
25、ation element, the ATM traffic descriptor information element, and the QoS parameter information element of the SETUP message shall be consistent. ITU-T 4.2961.2 4, Q.2961.3 6, 4.2961.4 7, Q.2961.6 8 and Q.2934 9 specify the valid combinations of bearer class, broadband transfer capability and ATM t
26、raffic descriptors when the requested QoS class value is O (“No specific QoS class explicitly requested“). In addition and for each of the 1.371 5 ATM transfer capability, Table A.UQ.2965.1 shows the valid combinations of bearer class, broadband transfer capability, ATM traffic descriptor parameters
27、 when the requested QoS class value is different from O (i.e. when a 1.356 i QoS class is explicitly requested). Table A.UQ.2965.1 covers the recommended association of 1.371 5 ATM transfer capabilities with 1.356 i QoS classes as described in Table 3D.356 i. 1 2 4 DBR DBR DBR Class 1 Class 2 Class
28、4 (stringent) (tolerant) (U class) Table A.UQ.2965.1 (Part 115) - DBR: Valid combinations of traffic and QoS-related parameters in the SETUP message 1 BTc (value) 7 7 7 Trafic descriptor for a given direction PCR (CLP = O) ILP=O+ i) I S I S I S I IMBS) (CLP = O) Table A.l/Q.2965.1 (Part 2/5) - SBR1:
29、 Valid combinations of traffic and QoS-related parameters in the SETUP message Broadband bearer capabilip Bearer class C, X, FR or VP C, X, FR or VP C, X, FR or VP 11 PCR (CLP = O) PCR (CLP = O + 1) SCR, MBS j (CLP = O + 1) Signalled QoS class SCR, MBS j (CLP = O) 11 S S S S S S 1 2 4 11 Explicitly
30、Requested 1.356 fl QoS class - Fafie descriptor for a given direction Class 1 (stringent) Class 2 (tolerant) I Requested 1.371 S ATC I SBRl I SBR1 I SBRl I Class 4 (U class) A, C, X, FRorVP 17 S (Note) S 1 ABT-IT Class 1 (stringent) A, C, X, A, C, X, FRorVP FRorVP I7 17 S S (Note) (Note) S S 2 4 ABT
31、-IT ABT-IT Class 2 Class 4 (tolerant) (U class) Table A.l/Q.2965.1 (Part 3/5) - ABT: Valid combinations of traffic and QoS-related parameters in the SETUP message Bearer class BTC (value) Trafic descriptor for a given direction 1 Broadband bearer capability I A, c, x, FR or VP 16 S (Note) S 2 1 PCR
32、(CLP = O) I S (Note) S 4 1 PCR (CLP = O + i) Is Explicitly requested 1.356 l QS class I (SCR, MBS) (CLP = O) I Class 1 (stringent) I Reauested 1.371 r5i ATC I ABT-DT ABT-DT I ABT-DT .NOTE - Optional. When not specified, SCR (CLP = O + 1) is equal to O and MBS (CLP = O + 1) is equal I to 1. Table A.U
33、Q.2965.1 (Part 4/5) - ABR: Valid combinations of traffic and QoS-related parameters in the SETUP message NOTE - Optional in the user-to-network direction. Mandatory in the network-to-user direction and at the TB reference point. Table A.l/Q.2965.1 (Part 5/5) - SBR2/SBR3 : Valid combinations of traff
34、ic and QoS-related parameters in the SETUP message C, X, FR or VP C, X, FR or VP C, X, FR or VP C7X7FR or VP I or VP 20 20 20 21 I 21 21 I S S S S S S 4 5 314 51 SBR2 SBR2 SBR3 I SBR3 SBR3 1 Class 4 ( class) Class 5 (stringent bi-level) Class 3 Class 4 (bi-level) (U class) Class 5 (stringent I SERIE
35、S OF ITU-T RECOMMENDATIONS Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Senes N Series O Series P Series Q Series R Series S Series T Series U Series V Seiies X Series Y Series z Organization of the work of ITU-T Means of expres
36、sion: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisua
37、l 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 other elements of outside plant TMN and network maintenance: intemational tran
38、smission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling
39、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 .
