1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STAN DAR DIZATI ON SECT0 R OF ITU Q.2961.6 SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access signalling (05198) Digital Subscriber Signalling System No. 2 - Add it i o na I traffic parameters : Ad
2、d it i on al signalling procedures for the support of the SBR2 and SBR3 ATM transfer capabilities ITU-T Recommendation Q.2961.6 (Previously CCIT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUT
3、OMATIC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM Rl SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SP
4、ECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN General aspects Signalling ATM adaptation layer (SAAL) Signalling network protocols Common aspects of B-ISDN app
5、lication protocols for access signalling and network signalling and interworking B-ISDN application protocols for the network siqnallina CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.1-Q.3 Q.4-Q.59 Q.60-(2.99 Q. 1 004.1 1 9 Q. 1 204.249 Q.250-Q.309 Q.310-Q.399 Q.400-(2.499 Q.500-Q.599 Q.60-Q.699 Q.
6、700-(2.849 Q.850-Q.999 Q. 1000-Q. 1 O99 Q. 1 1 004.1 1 99 Q.1200-Q. I999 Q.2000-Q.2999 Q.2000-Q.2099 Q.21004.2199 Q.2200-Q.2299 Q.2600-Q.2699 Q.2700-Q.2899 - - B-ISDN application protocols for access signalling Q.290-Q.2999 For further details, please refer to ITU-T List of Recommendations. STD-ITU-
7、T RECMN 8.29bL.b-ENGL 1998 m 48b2591 Ob53731 421 W ITU-T RECOMMENDATION Q.2961.6 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - ADDITIONAL TRAFFIC PARAMETERS: ADDITIONAL SIGNALLING PROCEDURES FOR THE SUPPORT OF THE SBR2 AND SBR3 ATM TRANSFER CAPABILITIES Summary This Recommendation defines the operati
8、on of the Digital Subscriber Signalling System No. 2 (DSS2) for the support of the SBR and SBR3 ATM transfer capabilities defined in Recommendation 1.371 that may be used for basic call and connection control at the TB or at the coincident SB and TB reference point of the user-to-network interface o
9、f the Broadband Integrated Services Digital Network (B-ISDN). The additional procedures defined in this Recommendation enable the call requesting user to invoke call/connection establishment between users using a connection for which the Statistical Bit Rate configuration 2 or 3 (SBW or SBR3) ATM tr
10、ansfer capability is applied by the network. Source ITU-T Recommendation Q.2961.6 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 15th of May 1998. FOREWORD ITU (International Telecommunication Union) is the United Nations Specialize
11、d Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the IT. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on
12、 a worldwide basis. The World Telecommunication Standardization 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 co
13、vered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fali within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration” is used for conciseness to
14、 indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no posit
15、ion 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, the ITU had not received notice of intellectual property, pr
16、otected 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 1998 All rights reserved. No part of this publication may be r
17、eproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. I Recommendation 4.2961.6 (05/98) 11 STD.ITU-T RECMN Q-29bL*b-ENGL 1998 48b259L Ob53933 2T4 m 1 2 3 4 5 6 6.1 6.2 6.3 7 7.1 7.2 8 8.1 8.2 9 9
18、.1 9.2 9.3 10 11 11.1 11.2 12 13 14 CONTENTS Page Scope References Definitions Abbreviations . Description . Operational requirements . Provision and withdrawal . Requirements at the originating network side Requirements at the terminating network side . Primitive and state definitions Primitive def
19、initions . Call states Coding requirements Messages . 8.1.1 SETUP . Information elements 8.2.1 ATM traffic descriptor information element . 8.2.2 Broadband bearer capability information element Signalling procedures at the coincident SB and TB reference point Procedures applicable at the originating
20、 interface 9.1 . 1 Traffic parameter selection procedures . Procedures applicable at the destination interface Handling of specific error conditions . Signalling procedures at the TB reference point for intenvorking with private B- ISDNs . Interworking with other networks Interaction with entities w
21、hich do not support SBR2 and SBR3 . Interworking with N.ISDN . Interactions with supplementary services . Parameter and timer values . Dynamic description (SDLs) Recommendation Q.2961.6 (05/98) 1 1 2 2 2 2 3 3 6 . 111 Page Annex A - Valid combinations of bearer class, broadband transfer capability,
22、and ATM traffic descriptor parameters for the support of the SBR2 and SBR3 ATM transfer capability 6 Annex B - Clarification on the support of SBR2 and SBR3 ATM transfer capabilities by this Recommendation . 7 iv Recommendation 4.2961.6 (05/98) 1- - Recommendation Q.2961.6 DIGITAL SUBSCRIBER SIGNALL
23、ING SYSTEM NO. 2 - ADDITIONAL TRAFFIC PARAMETERS: ADDITIONAL SIGNALLING PROCEDURES FOR THE SUPPORT OF THE SBR2 AND SBR3 ATM TRANSFER CAPABILITIES (Geneva, 1998) 1 Scope Recommendation 4.2961 covers the support of additional traffic parameters for the Broadband Integrated Services Digital Network (B-
24、ISDN) at the TB reference point or coincident SB and TB reference point as defined in Recommendation 1.413 i by means of the Digital Subscriber Signalling System No. 2 (DSS 2). This Recommendation defines the DSS 2 protocol procedures, formats and functions needed to support the identified ATM traff
25、ic related additional capabilities. This Recommendation is part of the DSS 2 family of ITU-T Recommendations; it specifies extensions to Recommendations 4.2931 2 and Q.2961.1 6, and does not repeat states, information elements, messages and procedures contained therein. This Recommendation defines m
26、ore specifically the additional signalling capabilities to support the SBR2 and SBR3 ATM transfer capabilities as defined in Recommendation 1.371 3. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions o
27、f this Recommendation. All references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the references listed below. A list of currently valid ITU-T Recommendations is regularly published. ITU-T Re
28、commendation 1.4 13 (1 993), B-ISDN user-network interface. ITU-T Recommendation 4.293 1 (1 995), Digital Subscriber Signalling System No. 2 - User-Network Interface (UNO layer 3 spectfication for basic callconnection control. ITU-T Recommendation 1.371 (1996), Trafic control and congestion control
29、in B-ISDN. ITU-T Recommendation Q.295 1 (1 995), Stage 3 description for number identification supplementary services using B-ISDN Digital Subscriber Signalling System No. 2 (DSS 2) - Basic call. ITU-T Recommendation 4.2957 (1 999, Stage 3 description for additional information transfer supplementar
30、y services using B-ISDN Digital Subscriber Signalling System No. 2 (DSS 2) - Basic call. ITU-T Recommendation 4.2961.1 (1 999, Digital Subscriber Signalling System No. 2 - Additional trafic parameters: Additional signalling capabilities to support trafic parameter for the tagging option and the sust
31、ainable call rate parameter set. ITU-T Recommendation 4.2955 (1 997), Stage 3 description for communiv of interest supplementary services using B-ISDN Digital Subscriber Signalling System No. 2 (DSS 2). Recommendation 4.2961.6 (05/98) 1 STDDITU-T RECMN Q=27bL*b-ENGL 1778 m 48b2571 Ob5373b TU3 m SI I
32、TU-T Recommendation 4.2961.2 (1997), Digital Subscriber Signalling System No. 2 - Additional trafic parameters: Support of ATM transfer Capability in the broadband bearer capability information element. ITU-T Recommendation 1.356 (1 996), B-ISDN ATM layer cell transfer performance. 9 3 Definitions T
33、he definitions of Annex J/Q.293 1 2 apply. This Recommendation defines the following terms: 3.1 traffic parameters: A traffic parameter is a specification of a particular traffic aspect. It may be quantitative or qualitative. Traffic parameters may for example describe peak cell rate, sustainable ce
34、ll rate, maximum burst size, Tagging option indicators, etc.; see Recommendation 1.371 3. 3.2 SBR2: See 5.5.4A.371 3. 3.3 SBR3: See 5.5.4A.371 3. 4 Abbreviations The abbreviations of Annex J/Q.2931 2 apply. This Recommendation uses the following abbreviations: ATC ATM Transfer Capability MBS Maximum
35、 Burst Size PCR Peak Cell Rate SBR SBR2 SBR3 SCR Sustainable Cell Rate Statistical Bit Rate ATM transfer capability SBR configuration 2 ATM transfer capability SBR configuration 3 ATM transfer capability 5 Description This Recommendation specifies the additional signalling procedures beyond the ones
36、 already specified by Recommendation 4.2931 2 and Recommendation 4.2961.1. In particular, the following additional capabilities are specified: - support of traffic parameters for Statistical Bit Rate configuration 2 ATM transfer capability as defined in Recommendation 1.371 3; support of traffic par
37、ameters for Statistical Bit Rate configuration 3 ATM transfer capability as defined in Recommendation 1.371 3. - 6 Operational requirements 6.1 Provision and withdrawal Additional ATC indications as specified in this Recmmendation may be included in signalling messages by the user without any prior
38、arrangement with the service provider. 2 Recommendation Q.2961.6 (0998) 6.2 The procedures according to 6.9 shall apply. Requirements at the originating network side 6.3 The procedures according to 6.9 shall apply. Requirements at the terminating network side 7 Primitive and state definitions 7.1 Pr
39、imitive definitions Clause 8/Q.293 1 2 shall apply. 7.2 Call states See clause 2/Q.293 1 2. No additional call states are defined. 8 Coding requirements 8.1 Messages No additional messages are specified beyond the ones of 3.UQ.2931 2. The existing 4.2931 messages that have had their contents modifie
40、d to support the SBR2 and SBR3 ATM transfer capabilities are described below. 8.1.1 SETUP The maximum length of the ATM traffic descriptor information element included in the SETUP message is changed from 20 (in Recommendation 4.2931 121) to 28 octets to allow inclusion of the additional traffic des
41、criptor parameters SCR and MBS described in Recommendation 4.2961.1 6. The Traffic management options field described in Recommendation 4.2961.1 shall not be included (i.e. the local tagging option as described in Recommendation 4.2961.1 cannot be combined with a request for SBR2 or SBR3 ATC as spec
42、ified in Recommendation 1.371 3). 8.2 Information elements See clause 4/Q.293 1 23. 8.2.1 The coding of the ATM traffic descriptor information element is specified in Recommendation Q.2961.1 6. For Recommendation 4.2961.1, the Local Tagging subfield in the Trafic Management Options field specified i
43、n Recommendation 4.2961.1 (Le. in octet group 17) shall not be included. ATM traffic descriptor information element 8.2.2 The Broadband bearer capability information element is specified in Recommendation 4.2961.2 8 and is used to explicitly identiSr the ATM transfer capability as indicated below. T
44、he following codepoints are added to the BTC field of the Broadband bearer capability information element to indicate SBR2 or SBR3. Accordingly, the following is added to the part of Table uQ.2961.2 entitled “Values used on transmission and reception“: Broadband bearer capability information element
45、 Recommendation Q.2961.6 (05/98) 3 STD-ITU-T RECMN Q-27bL-b-ENGL 1778 W 48b259L Ob53938 88b - Broadband Transfer Capability (octet 5a) Bits 7654321 O010100 SBR2 O010101 SBR3 9 The procedures for basic callconnection control as defined in clause 5Q.2931 2 shall apply. Procedures to handle the additio
46、nal traffic parameters (SCR and MBS) that may be present in the ATM traffic descriptor information element are defined in 1.914.2961.1 6. In the following subclauses only additional procedures to handle call/connections based on the SBR2 or SBR3 ATM transfer capability are described. These procedure
47、s shall only apply when the SETUP message contains a Broadband bearer capability information element indicating SBR2 respectively SBR3 according to the guidelines in Annex A. 1.9. 1Q.2961.1 6 applies with the restriction that: Signalling procedures at the coincident S, and T, reference point 0 proce
48、dures for the support of local tagging do not apply; and the combination of traffic parameters shall be the same for both directions, as described in O Annex A. For the support of SBR2 and SBR3, 1.9.214.2961.1 6 shall be replaced by 9.1 and 9.2 below. Valid combinations of bearer class, broadband tr
49、ansfer capability, and ATM traffic descriptor parameters for the support the SBR2 and SBR3 ATM transfer capability are included in Annex A. Additional clarification on the support of SBR2 and SBR3 ATM transfer capabilities by the signalling procedures described in this Recommendation are included in Annex B. 9.1 The procedures described in 5.1.1/Q.2931 2 as modified by 1.9/Q.2961.1 6 shall apply with the following additional procedures. The calling party requests SBR2 respectively SBR3 call/connection establishment
