1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2961.5 (03199) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access signalling Digital subscriber signalling system No. 2 - Add i ti on al traffic parameters : Add it
2、ion al traffic parameters for cell delay variation tolerance indication ITU-T Recommendation (2.2961.5 (Previously CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPE
3、CIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTE
4、M No. I PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN General aspects Signalling ATM adaptatio
5、n layer (SAAL) Signailing network protocols Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking Q. 1 -Q. 3 Q.4-Q.59 Q .60-Q. 99 Q.100-Q.119 Q.120-Q.249 Q.250-Q.309 Q.310-Q.399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 Q.700-Q.849 Q. 850-Q .999 Q. I
6、000-Q. I O99 Q.ll OO-Q.1 I99 Q.1200-Q.1699 Q. 1700-Q. 1799 Q.2000-Q.2999 Q.2000-Q.2099 Q.2100-Q.2199 Q.2200-Q.2299 Q.2600-Q.2699 B-ISDN application protocols for the network sianallina 0.2700-0 2899 For further details, please refer to ITU-T List of Recommendations. ITU-T RECOMMENDATION Q.2961.5 DIG
7、ITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - ADDITIONAL TWFIC PARAMETERS: ADDITIONAL TRAFFIC PARAMETERS FOR CELL DELAY VARIATION TOLERANCE INDICATION Summary Recommendation 4.2961.5 belongs to the DSS2 family of ITU-T Recommendations and specifies extensions to Recommendations 4.2931, 4.2961.1, 4.2961.
8、2, 4.2961.3, Q.2961.4, Q.2961.6 and 4.2934 to speci the additional DSS2 traffic-related parameters, formats, protocol procedures and functions needed to support the user-to-network and network-to-user indication of Cell Delay Variation Tolerances at callhonnection establishment time, consistently wi
9、th the traffic management requirements and features defined in Recommendation 1.371. I Source ITU-T Recommendation 4.2961.5 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 15th of March 1999. Recommendation 4.2961.5 (03/99) 1 FOREWOR
10、D ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU 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 iss
11、uing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, estabhhes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on th
12、ese topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. I 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 m
13、icrofilm, without permission in writing from the ITU. 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 individu
14、al, company, corporation or governmental organization that operates a public correspondence service. The terms Administration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the pra
15、ctice or implementation of this Recommendation,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 d
16、evelopment process. As of the date of approval of this Recommendation, the 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 latest information and ar
17、e therefore strongly urged to consult the TSB patent database. ii Recommendation 4.2961.5 (83/99) I - STD-ITU-T . RECMN Q.29bL-S-ENGL . -_ ._ 1999 Li862591 Obbb355 04T II CONTENTS 1 2 3 4 5 6 6.1 6.2 6.3 7 7.1 . . 7.2 8 8.1 8.2 9 9.1 9.2 10 11 11.1 11.2 12 13 14 Scope References Definitions Abbrevia
18、tions . Description . Operational requirements . Provision and withdrawal . Requirements at the originating network side Requirements at the terminating network side . Primitive and state definitions Primitive definitions . Call states . Coding requirements Messages 8.1.1 CONNECT . 1 8.1.2 SETUP Inf
19、ormation elements 8.2.1 CDVT descriptor . Signalling procedures at the coincident SB and TB reference point . CaWConnection establishment at the originating interface Traffic Parameters selection procedures . 9.1.2 Call/Connection acceptance Traffic parameter selection procedures . 9.2.2 CalllConnec
20、tion acceptance 9.1.1 CallConnection establishment at the destination interface . 9.2.1 Signalling procedures at the TB reference point for intenvorking with private B-1SDNs . Interworking with other networks Interaction with entities which do not support the explicit indication of CDVT . Interworki
21、ng with N-ISDN . Interactions with supplementary services . Interactions with traffic parameter negotiation at connection establishment . Interactions with connection modification . Recommendation 4.2961.5 (03/99) Page 1 1 2 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 7 7 7 8 9 9 9 10 10 10 11 11 11 11 . 111 STD-
22、ITU-T - RECMN - - Q-29b305-ENGL _ 3999 _ - 4862593 Ob66356 T8b I Page 15 Timers . 11 16 Dynamic description (SDLs) 11 Annex A - Applicability of the various CDVT parameters to the ATM transfer capabilities 12 13 . Appendix I - Guidelines for the setting of the instruction indicator iv Recommendation
23、 Q.2961.5 (03/99) . . Recommendation 4.2961.5 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - ADDITIONAL TRAFFIC PARAMETERS: ADDITIONAL TRAFFIC PARAMETERS FOR CELL DELAY VARIATION TOLERANCE INDICATION (Geneva, 1999) 1 Scope The Q.296 1 -series Recommendations covers the support of additional traffic pa
24、rameters for the Broadband Integrated Services Digital Network (B-ISDN) at the TB reference point or coincident Sg and TB reference point as defined in Recommendation 1.413 i by means of the Digital Subscriber Signalling System No. 2 (DSS2). This Recommendation defines the DSS2 protocol procedures,
25、formats and functions needed to support the identified ATM traffic-related additional capabilities. This Recommendation is part of the DSS2 family of ITU-T Recommendations and specifies extensions to Recommendation 4.293 1. It does not repeat states, information elements, messages and procedures con
26、tained therein, but only specifies extensions related to additional traffic parameter indications. This Recommendation defines the signalling capabilities to support the cell delay variation tolerance (CDVT) indications at call/connection establishment time for Peak Cell Rate with CLP = O + 1, for t
27、he Sustainable Cell Rate with CLP = O + 1, for the Sustainable Cell Rate with CLP = O and for the Resource Management peak cell rate, consistently with the traffic management features and requirements defined in Recommendation 1.371 4. 2 References The following ITU-T Recommendations and other refer
28、ences contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to
29、investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of currently valid ITU-T Recommendations is regularly published. i IT-T Recommendation 1.4 13 (1 993), B-ISDN user-network interface. 2 ITU-T Recommendation 4,2931 (1995),
30、 Digital subscriber signalling system No. 2 - User-Network Interface (UNO layer 3 speciJcation for basic calliconnection control. 3 ITU-T Recommendation F.8 1 1 (1996), Broadband connection-oriented bearer service. 4 ITU-T Recommendation 1.371 (1996), Trafic control and congestion control in B-ISDN.
31、 5 ITU-T Recommendation I. 150 (I 999), B-ISDN ATM Functional Characteristics. 6 ITU-T Recommendation 1.361 (1999), B-ISDNATM layer specijkation. 7 ITU-T Recommendation Q.295 1 .x-series (1 99.9, Stage 3 description for number identification supplementary services using 3-ISDN digital subscriber sig
32、nalling system No. 2 (DSS 2) - Basic Call. ITU-T Recommendation 4.2955.1 (1 997), Stage 3 description for community of interest supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS 2) - Closed User Group (CUG). 8 Recommendation Q.2961.5 (03199) 1 ITU-T Recommendation 4
33、.2957.1 (1 995), Stage 3 description for additional information transfer supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS 2) - Basic Call: user-to-user signalling (UUS). ITU-T Recommendation 1.6 1 O (1 999), B-ISDN operation and maintenance procedures. ITU-T Recomm
34、endation 4.2961.1 (1995), Digital subscriber signalling system No. 2 - Additional trafic parameters: Additional signalling capabilities to support trafic parameters for the tagging option and the sustainable cell rate parameter set. ITU-T Recommendation 4.2961.2 (1 997), Digital subscriber signallin
35、g system No. 2 - Additional trafic parameters: Support of ATM transfer capability in the broadband bearer capability information element. ITU-T Recommendation 4.2961.3 (1997), Digital subscriber signalling system No. 2 - Additional trafic parameters: Signalling capabilities to support traffic parame
36、ters for the available bit rate (ABR) ATM transfer capability. ITU-T Recommendation 4.296 1.4 (1 997), Digital subscriber signalling system No. 2 - Additional trafic parameters: Signalling capabilities to support traflc parameters for the ATM Block Transfer (ABT) ATM transfer Capability. ITU-T Recom
37、mendation 4.2961.6 (1998), Digital subscriber signalling system No. 2 - Additional trafic parameters: Additional signalling procedures for the support of the SBR 2 and SBR 3 ATM transfer capabilities. ITU-T Recommendation Q.2962 (1 998), Digital subscriber signalling system No. 2 - Connection charac
38、teristics negotiation during caWconnection establishment phase. ITU-T Recommendation Q.2963.1 (1996), Digital Subscriber Signalling System No. 2 - Connection modijication: Peak cell rate modijication by the connection owner. ITU-T Recommendation 4.2963.2 (1997), Digital Subscriber Signalling System
39、No. 2 - Connection modcation: Modfication procedures for sustainable cell rate parameters. ITU-T Recommendation Q.2963.3 (1 998), Digital Subscriber Signalling System No. 2 - Connection modijication ATM. Trafic descriptor modijkation with negotiation by the connection owner. ITU-T Recommendation Q.2
40、934 (1998), Digital Subscriber Signalling System No. 2 - Connection modijication: Switched virtual path capability. Definitions The definitions in Annex J/Q.2931 2 apply. In addition, this Recommendation defines the following terns: 3.1 traffic contract: A traffic contract specifies the negotiated t
41、raffic and QoS characteristics of an ATM layer connection at the B-ISDN UNI (see Recommendation 1.371 4). 3.2 traffic control: Traffic control at the ATM layer refers to the set of actions taken by the network to avoid congested conditions. A list of traffic control functions is given in Recommendat
42、ion 1.3 7 1 4. 3.3 traffic parameters: A traffic parameter is a specification of a particuiu traffic aspect. It may be quantitative or qualitative. Traffic parameters may for example describe peak cell rate, minimum cell rate, etc. 3.4 resource management cells: Cells used to manage (renegotiate and
43、 modiSr) traffic parameters associated to an established connection. 2 Recommendation 4.2961.5 (03199) 3.5 cell delay variation tolerance: Upper bound of the tolerance admitted for the time interval between cells pertaining to a given cell flow (e.g. user data, end-to-end OAM, Resource Management fl
44、ows). 3.6 default zMAX: Default maximum cell delay variation that can be tolerated on a given cell stream. This value is specific at each interface. In particular it depends on whether or not a traffic shaping function is available at the receiving and transmitting sides of ATM switching nodes at ei
45、ther side of the user-network interface (see Recommendation 1.37 1 4). 4 Abbreviations The abbreviations in Annex J/Q.2931 2 apply. In addition, this Recommendation uses the following abbreviations: ABR ABT-DT ABT-IT CDVT DBR OAM RM SBR TMAX Maximum CDVT value Available Bit Rate ATM layer transfer c
46、apability (see Recommendation 1.371 4). ATM Block Transfer with Delayed Transmission (see Recommendation 1.37 1 4). ATM Block Transfer with Immediate Transmission ATM layer transfer capability (see Recommendation 1.37 1 4). Cell Delay Variation Tolerance (see Recommendation 1.371 4). Also noted T. D
47、eterministic Bit Rate ATM layer transfer capability (see Recommendation 1.371 4). Operations, Administration and Maintenance (see Recommendation 1.6 1 O 1 O). ATM Resource Management cells (see Recommendation 1.371 4). Statistical Bit Rate ATM transfer capability (see Recommendation 1.37 1 4). 5 Des
48、cription This Recommendation specifies the signalling of CDVT traffic-related parameters beyond the ones already specified by Recommendations 4.2931 2, 4.2961.1 li, 4.2961.2 12, 4.2961.3 13, 4.296 1.4 141, 4.296 1.6 151 and Q.2934 20. In particular, the following additional capabilities are specifie
49、d: - indication of the CDVT, pc(0 + i), relating to the Peak Cell Rate with CLP = O + 1; - indication of the CDVT, TSCR(O), relating the Sustainable Cell Rate with CLP = O; - indication of the CDVT, TSCR(O + i), relating to the Sustainable Cell Rate with CLP = O + 1; - indication of the CDVT, TPCR(RM), relating to the Resource Management peak cell rate. CDVT indication is used to signal the CDVT values to be used for a connection between the entities involved. At the UNI the calling user may request CDVT value
