1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2963.3 SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access Sig na1 I i ng (05/98) Digital Subscriber Signalling System No. 2 - Connection modification: ATM traffic de
2、scriptor modification with negotiation by the connection owner ITU-T Recommendation Q.2963.3 (Previously CCITT Recommendation) STD-ITU-T RECMN Q.2963.3-ENGL 3798 4862593 Ob52889 47T ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL A
3、UTOMATIC AND SEMI-AUTOMATIC 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 R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF
4、SIGNALLING SYSTEMS SPECIFICATIONS 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
5、aspects of B-ISDN application protocols for access signalling and network signalling and interworking B-ISDN application protocols for the network signalling CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.1-(2.3 Q .4-Q. 59 Q.60-Q.99 (2.1 00-Q.119 Q. 1 20-Q. 249 Q.250-Q.309 Q.3104.399 Q.400-Q.499 Q.5
6、00-Q.599 Q.600-Q.699 Q.700-(2.849 Q.850-(2.999 Q. 1000-Q. 1 O99 Q. Il 00-Q.1199 Q.1200-Q.1999 Q.2000-(2.2999 Q.20004.2099 Q.2100-(2.2199 Q.2200-Q.2299 Q.2600-(2.2699 Q.270W.2899 B-IS For further details, please refer to ITU-T List of Recommendations. STD=ITU-T RECMN Q-29b3.3-ENGL 1998 D 4862571 Ob52
7、890 191 D ITU-T RECOMMENDATION 4.2963.3 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - CONNECTION MODIFICATION: ATM TRAFFIC DESCRIPTOR MODIFICATION WITH NEGOTIATION BY THE CONNECTION OWNER Summary The 4.2963 series of Recommendations belongs to the DSS 2 family of ITU-T Recommendations and specifies t
8、he procedure of the modification of traffic parameters of a callconnection in the active state. Recommendation Q.2963.3 defines the procedure of the ATM Traffic Descriptor modification with negotiation which is equivalent to that specified in Recommendation 4.2962. Source ITU-T Recommendation 4.2963
9、.3 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. Keywords MBS, modification, negotiation, PCR, SCR. STD-ITU-T RECMN Q.2963.3-ENGL 1998 48b257L Ob52891 028 FOREWORD ITU (International Telecommunication Union) is th
10、e United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The IT-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standard
11、izing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the
12、Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within IT-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ i
13、s used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The IT draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right
14、. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITLJ 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
15、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 1998 All rights reserved. No part of
16、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 IT. Recommendation 4.2963.3 (0998) 11 . STD.1TU-T RECMN Q.2963-3-ENGL 1998 m 486259L Ob52892 Tb4 CONTENTS Page 1 2 3 4 5
17、5.1 5.2 5.3 6 6.1 6.2 6.3 7 7.1 7.2 8 8.1 8.2 9 9.1 Scope References Definitions Abbreviations . Description . Modifiable connections Modification of a point-to-point connection Negotiation during modification Operational requirements . Provision and withdrawal . Requirements on the originating netw
18、ork side . Requirements on the destination network side . Primitive and state definitions Primitive definitions . State definitions Coding requirements Messages . 8.1.1 MODIFY REQUEST 8.1.2 MODIFY ACKNOWLEDGEMENT 8.1.3 MODIFY REJECT 8.1.4 CONNECTION AVAILABLE . Coding of specific message types and s
19、pecific information element . Coding of specific message type . Coding of specific information elements 8.2.1 8.2.2 Signalling procedures at the coincident SB and TB reference point Modification procedure at the requesting entity . 9.1.2 Modification acknowledgment Response to STATUS messages while
20、in the modi request state No response to modification request . 9.1.1 Modification request . 9.1.3 9.1.4 9.1.5 Indication of modification rejection 1 1 2 2 2 2 3 3 4 4 4 4 4 4 5 5 5 5 5 5 6 6 6 6 6 6 6 . Recommendation Q.2963.3 (0398) 111 9.2 Modification procedures at the responding entity 9.2.1 Mo
21、dification indication . 9.2.2 Modification acceptance 9.2.3 Modification confirmation 9.2.4 Modification rejection . 9.3 Transit entity conveyance of CONNECTION AVAILABLE messages Procedures the . point for intenvorking with private B-ISDNs . 11 Interworking with other networks 12 Interworking with
22、supplementary services . 13 Parameter values . 14 Dynamic descnption SDLs . Appendix I . Example configuration of user and network behaviour during modification procedures . Appendix II . Guidelines for the use of the instruction indicator . Page 7 7 7 8 8 9 9 9 10 12 iv Recommendation 4.2963.3 (05/
23、98) STD-ITU-T RECMN Q.29b3.3-ENGL 1998 48b2591 Ob52894 837 Recommendation 4.2963.3 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - CONNECTION MODIFICATION: ATM TRAFFIC DESCRIPTOR MODIFICATION WITH NEGOTIATION BY THE CONNECTION OWNER (Geneva, 1998) 1 Scope This Recommendation specifies the signalling pr
24、otocol for ATM Traffic Descriptor modification with negotiation for the Broadband Integrated Services Digital Network (B-ISDN) at the TB reference point or coincident S, and T, reference point (as defined in Recommendation 1.413 i) by means of the Digital Subscriber Signalling System No. 2 (DSS 2).
25、This Recommendation extends the ATM Traffic Descriptor modification capability specified in Q.2963.2 to support the traffic parameter negotiation which is equivalent to that specified in 4.2962. In addition, this Recommendation specifies the protocol requirements at the T, reference point where the
26、service is provided to the user via a private B-ISDN. The capability described in this Recommendation enables the connection owner to modifi the ATM Traffic Descriptor with negotiation for caWconnections that have already been established. This Recommendation specifies the procedure of the modificat
27、ion with negotiation of PCR, SCR and MBS using either an Alternative ATM traffic descriptor information element or a Minimum acceptable ATM traffic descriptor information element. ATM Traffic Descriptor modification with negotiation is applicable to all connection oriented telecommunication services
28、 that are based on single point-to-point calls/connections. The ATM Traffic Descriptor modification with negotiation for point-to-multipoint calls/connections is outside the scope of this Recommendation. This Recommendation is applicable to equipment, supporting ATM Traffic Descriptor modification w
29、ith negotiation, to be attached at either side of a TB reference point or coincident S, and TB reference point when used as an access to the public B-ISDN. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provi
30、sions 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 investigate the possibility of applying the most recent edition of the Recommend
31、ations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. 11 2 3 ITU-T Recommendation 1.41 3 (1993), B-ISDN user-network interface. ITU-T Recommendation 4.293 1 (1 999, Digital Subscriber Signalling System No. 2 - User- Network interface (U
32、NI) Layer 3 specijkation for basic callconnection control. ITU-T Recommendation 4.2961.1 (1999, 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 se
33、t. Recommendation 4.2963.3 (0998) 1 4 5 6 ITU-T Recommendation 4.2962 (1998), Digital Subscriber Signalling System No. 2 - Connection characteristics negotiation during caWconnection establishment phase. ITU-T Recommendation 4.2963.1 (1 996), Digital Subscriber Signalling System No. 2 - Connection m
34、odijication: Peak cell rate modijication by the connection owner. ITU-T Recommendation 4.2963.2 (1997), Digital Subscriber Signalling System No. 2 - Connection modification: Modijication procedures for sustainable cell rate parameters. 3 Definitions For the purpose of this Recommendation, the defini
35、tions in clause 3/Q.2963.1 apply. 4 Abbreviations This Recommendation uses the following abbreviations: ATM Asynchronous Transfer mode B-ISDN CLP Cell Loss Priority MBS Maximum Burst Size PCR Peak Cell Rate SCR Sustainable Cell Rate UNI User-Network Interface vc Virtual Channel Broadband Integrated
36、Services Digital Network 5 Description The description given in clause YQ.2963.2 shall apply with the following addition: 4) The following negotiation capabilities are applicable in the modification procedure: - negotiation of sets of traffic parameters in the ATM traffic descriptor using an Alterna
37、tive ATM traffic descriptor; and negotiation of individual traffic parameters in the ATM traffic descriptor using a Minimum acceptable ATM traffic descriptor. - 5.1 Modifiable connections Subclause 5.VQ.2963.2 shall apply with the replacement of its fourth paragraph with the following sentences. Dur
38、ing the modification with negotiation of the ATM traffic descriptor, the following rule applies: e Trafic parameters in the backward direction When the entity sends a MODIFY REQUEST message that includes a Minimum acceptable ATM traffic descriptor information element, the traffic descriptor for the
39、connection that applies to this entitys reception until completion of the modification procedure is a traffic descriptor for which the parameter values are determined by taking the maximum of the existing value, the value (if any) specified in the ATM traffic descriptor information element, and the
40、value (if any) specified in the Minimum acceptable ATM traffic descriptor information element. When the entity sends a MODIFY REQUEST message that includes 2 Recommendation 4.2963.3 (05/98) STDeITU-T RECMN Q-27b3-3-ENGL 1998 = 4862591 0b5287b bOT an Alternative ATM traffic descriptor information ele
41、ment, the traffic descriptor for the connection that applies to this entitys reception until completion of the modification procedure is a traffic descriptor for which the parameter values are determined by taking the maximum of the existing value, the value (if any) specified in the ATM traffic des
42、criptor information element, and the value (if any) specified in the Alternative ATM traffic descriptor information element. Trafic parameters in the forward direction When the entity sends a MODIFY REQUEST message that includes a Minimum acceptable ATM traffic descriptor information element, the tr
43、affic descriptor for the connection that applies to this entitys transmission until completion of the modification procedure is a traffic descriptor for which the parameter values are determined by taking the minimum of the existing value, the value (if any) specified in the ATM traffic descriptor i
44、nformation element, and the value (if any) specified in the Minimum Acceptable ATM traffic descriptor information element. When the entity sends a MODIFY REQUEST message that includes an Alternative ATM traffic descriptor information element, the traffic descriptor for the connection that applies to
45、 this entitys transmission until completion of the modification procedure is a traffic descriptor for which the parameter values are determined by taking the minimum of the existing value, the value (if any) specified in the ATM traffic descriptor information element, and the value (if any) specifie
46、d in the Alternative ATM traffic descriptor information element. 5.2 Subclause 5.2/Q.2963.2 shall apply. Modification of a point-to-point connection 5.3 Negotiation during modification This Recommendation supports the traffic parameter negotiation in their modification procedure by using an Alternat
47、ive ATM traffic descriptor or a minimum acceptable ATM traffic descriptor. When an Alternative ATM traffic descriptor is used, the parameters of this information element are handled as a single set, whereas a Minimum acceptable ATM traffic descriptor information element allows the specification of a
48、 range of values for parameters which are then handled independently for the selection of their respective value. Both the use of Alternative ATM traffic descriptor information element and of the Minimum acceptable ATM traffic descriptor information element allows negotiation of any relevant ATM-rel
49、ated traffic parameters (i.e. peak cell rate, sustainable cell rate and maximum burst size traffic parameters, depending on the ATM transfer capability actually used for the connections). 6 Operational requirements The provision of the connection modification capability is a service provider option. 6.1 Provision and withdrawal It is a user and a network option to provide the procedures described in this Recommendation. If implemented, the procedures of this Recommendation may be provided as a subscription option to the served user on the
