ITU-T Q 2983-1999 Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling No 2 (DSS2) - Bearer Control Protocol - Series Q Switching and Signalling -s f.pdf

1、INTERNATIONAL TELECOMMUNICATION UN ION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2983 SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access signalling (1 2/99) Broadband integrated services digital network (B-ISDN) - Digital subscriber signalling N

2、o. 2 (DSS2) - Bearer control protocol ITU-T Recommendation Q.2983 (Previously CCITT Recommendation) i18b2593 ObbSLOL 889 = INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2983 SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - 6-ISDN application protoco

3、ls for access signalling (1 2199) Broadband integrated services digital network (6-ISDN) - Digital subscriber signalling No. 2 (DSSZ) - Bearer control protocol ITU-T Recommendation Q.2983 (Previously CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTE

4、RNATIONAL MANUAL SERVICE Q.l-Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4-Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q. 604.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100-Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 Q.120-Q.249 SPECIFICATIONS OF

5、SIGNALLING SYSTEM No. 6 Q.250-Q.309 SPECIFICATIONS OF SIGNALLING SYSTEM R1 Q.310-Q.399 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400-Q.499 DIGITAL EXCHANGES Q. 50O-Q. 599 INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAN

6、D MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN General aspects Signalling ATM adaptation layer (SAAL) Signalling network protocols SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.60-Q.699 Q.700-Q.849 Q.850-Q.999 Q. 1000-Q. I O99 Q. 1100-Q. 1199 Q.

7、 1200-Q. 1699 Q.1700-Q.1799 Q.200-Q.2999 Q.2000-Q.2099 Q.210-Q.2199 Q.2200-Q.2299 Common aspects of B-ISDN application protocols for access signalling and network Q.2600-Q.2699 signalling and interworking B-ISDN application protocols for the network signalling Q.2700-Q.2899 k-ISDNaplicaon - .* P1 .

8、protocols for acc Ili - 4.2900-4.2999 For further details, please ref0 to ITU-T List of Recommendations. ITU-T RECOMMENDATION 4.2983 BROADBAND INTEGRATED SERVICES DIGITAL NETWORK (B-ISDN) - DIGITAL SUBSCRIBER SIGNALLING NO. 2 (DSS2) - BEARER CONTROL PROTOCOL Summary This Recommendation belongs to th

9、e DSS2 fhmily of ITU-T Recommendations and specifies extensions to Recommendation 4.293 1 to speciQ the additional DSS2 protocol elements (messages, information elements, procedures and functions) required to support the separated control (establishment, modification, clearing) of bearers associated

10、 to a call controlled independently by means of a separated call control protocol. The separated call control protocol may be either the generic functional protocol-based separated call control protocol defined in Recommendation 4.2981 or the 4.293 1-based separated call control protocol dened in Re

11、commendation 4.2982. Source ITU-T Recommendation 4.2983 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on 3 December 1999. Keywords Bearer control, call control, separation. Recommendation Q.2983 (12/99) 1 FOREWORD ITU (International Telec

12、ommunication 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 issuing Recommendations on th

13、em with a view to standardizing telecommunications on 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

14、 of Recommendations by the 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 ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the e

15、xpression “Administration“ is used for conciseness to 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 claime

16、d 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 of this Recommendation, the ITU

17、 had 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 patent database. O ITU 2000 All righ

18、ts 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. 11 Recommendation 4.2983 (12199) CONTENTS Page Scope .,. 1 1 2 References . . . . . . . . .

19、. . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 3 4 Abbreviations . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , .

21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . .

22、Application to interface structure . . . . . . . Capabilities supported by this Recommendation . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

23、. . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.1 5.2 5.3 Operational requirements . . . . . , . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . .

24、 . . . . . . . . . . . . Provision and withdrawal . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . Requirements on the originating network side . . . . Requirements on the destination network

25、 side . . Primitive definitions and state definitions . . . . Primitive definitions . . . . . . . . , . . . , . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . , . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . Bearer state definitions ,. *. 6

26、 6.1 6.2 6.3 7 7.1 7.2 8 8.1 Coding requirements . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . , . . . . . . . . . . . . . . Messages . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . .

27、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.1 Modification to messages defined in 4.293 1 .,. Information elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28、 . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.1 Call association , 8.2.2 Bearer identifier .,. . 8.2.3 Other information elements . 8.2 8 8 8 8 9 10 9 9.1 9.2 Signalling procedures at the coincident SB and TB refe

29、rence point Introduction , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Establishment of a bearer . 9.2.1 Additional procedures at a

30、preceding side ,. 9.2.2 Additional procedures at a succeeding side Clearing of a connection 9.3 10 11 12 13 Signalling procedures at the TB reference point . 10 Interworking with other networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31、. . . . . . . . . . . . . . . . , . . Interactions with supplementary services . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 10 Parameter values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . Recommendation Q.2983 (12/99) 111 Page 10 10 14 Dynamic description SDLs . Appendix I - Guidelines for the use of the instruction indicator . Appendix II - Significa

33、nce and use of the bearer identifier and call association at the user- network interface . 11 iv Recommendation Q.2983 (12/99) D 98b2591 ObbL07 277 Recommendation 4.2983 BROADBAND INTEGRATED SERVICES DIGITAL NETWORK (B-ISDN) - DIGITAL SUBSCRIBER SIGNALLING NO. 2 (DSS2) - BEARER CONTROL PROTOCOL (Gen

34、eva, 1999) 1 Scope This Recommendation specifies a signalling protocol for the purpose of bearer control at the B-ISDN user-network interface. The protocol operates between two adjacent bearer control entities. This Recommendation specifies the essential features, procedures, and messages required f

35、or controlling bearers associated to calls in a functionally separated call and bearer control environment. The procedures specified by this Recommendation are applicable at the TB reference point or coincident SB and TB reference point as defined in Recommendation 1.413 i by means of the Digital Su

36、bscriber Signalling System No. 2 (DSS2). The bearer control protocol defined by this Recommendation is applicable to control bearers associated to a call which is controlled independently by means of a separated call control protocol. NOTE - The separate call control protocol may be either the gener

37、ic functional protocol-based separated call control protocol defined by Recommenation 4.2981 123 or the 4.2931-based separated call control protocol I , defined by Recommendation 4.2982 3. 2 References The following ITU-T Recommendations and other references contain provisions which, through referen

38、ce in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. Ail Recommendations and other references are subject to revision: all users of this Recommendation are therefore encouraged to investigate the possibility of applying the mos

39、t recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T Recommendation 1.41 3 (1993), B-ISDN user-network interJaCe. ITU-T Recommendation 4.298 1 (1 999), Broadband integrated services digital networ

40、k (B-ISDN) and broadband private integrated services network (B-PISN) - Call control protocol. ITU-T Recommendation 4.2982 (1999), Broadband integrated services digital network (B-ISDN) - Digital subscriber signalling system No. 2 (DSS2) - Q.2931-based separated call control protocol. ITU-T Recommen

41、dation 4.293 1 (1995), Digital subscriber signalling system No. 2 - User-network interface (UVI) layer 3 specifxation for basic callconnection control. ITU-T Recommendation 1.327 (1 993), B-ISDN functional architecture. ITU-T Recommendation 4.2130 (1994), B-ISDN signalling ATM adaptation layer - Ser

42、vice specific coordination function for support of signalling at the user-network interface (SSCF at UNI). Recommendation Q.2983 (12/99) 1 ITU-T Recommendation 4.296 1.1 (1995), Digital subscriber signalling system No. 2 - Additional traffic parameters: Additional signalling capabilities to support

43、traffic parameters for the tagging option and the sustainable cell rate parameter set. ITU-T Recommendation 4.2961.2 (1997), Digital subscriber signalling system No. 2 - Additional traffic parameters: Support of ATM transfer capability in the broadband bearer capability information element. ITU-T Re

44、commendation 4.296 1.3 (1997), Digital subscriber signalling system No. 2 - Additional traffic parameters: Signalling capabilities to support traffic parameters for the available bit rate (ABI?) ATM transfer capability. ITU-T Recommendation 4.2961.4 (1997), Digital subscriber signalling system No. 2

45、 - Additional trafic parameters: Signalling capabilities to support traffic parameters for the ATM Block Transfer (ABT) ATM transfer capability. ITU-T Recommendation 4.2961.5 (1999), Digital subscriber signalling system No. 2: Additional trafic parameters: DSS2 additional traffic parameters for cell

46、 delay variation tolerance indication. ITU-T Recommendation 4.2961.6 (1998), Digital subscriber signalling system No. 2 - Additional traffic parameters: Additional signalling procedures for the support of the SBR2 and SBR3 ATM transfer capabilities. ITU-T Recommendation 4.2965.1 (1999), Digital subs

47、criber signalling system No. 2 - Support of quality of service classes. 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 (1996), Digital subscriber signallin

48、g system No. 2 - Connection modijkation: Peak cell rate modiJication by the connection owner. ITU-T Recommendation 4.2963.2 (1997), Digital subscriber signalling system No. 2 - Connection modijcation: Modjkation procedures for sustainable cell rate parameters. ITU-T Recommendation 4.2963.3 (1998), D

49、igital subscriber signalling system No. 2 - Connection modijcation: ATM traffic descriptor modijcation with negotiation by the connection owner. Definitions This Recommendation defines the following terms: 3.1 bearer state: State for each bearer (see 7.2) which is known by the layer 3 Bearer Control (BC) entity. The different bearer states correspond to the callconnection states defhed in clause 2/Q.293 1 4, Le. the states of the 4.293 1 protocol entities on both sides of the UNI and relate to each call-associated bearer. 3.2 bearer: A connection for the trans