1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2630.2 (1 2/2000) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - Common aspects of B-ISDN application protocols for access signalling and network Sig na1 I i ng and i nte two rki ng AAL type 2 signalli
2、ng protocol - Capability set 2 ITU-T Recommendation Q.2630.2 (Formerly 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 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND
3、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 Q3 INTERFACE DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETW
4、ORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI- AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General aspects Signalling ATM adaptation layer (SAAL) Signalling netw
5、ork protocols Common aspects of B-ISDN application protocols for access signalling and network B-ISDN application protocols for the network signalling B-ISDN application protocols for access signalling signalling and interworking -d Q. 1-4.3 Q .4-Q . 5 9 Q.60-Q.99 Q.lOO-Q.119 Q.120-Q.249 Q.25O-Q.309
6、 Q.310-Q.399 Q.40O-Q.499 Q.50O-Q.599 Q.60O-Q.699 Q.70bQ.799 Q.800-Q.849 Q.850-Q.999 Q. 1000-Q. 1099 Q.1100-Q.1199 Q. 1200-4.1699 Q.1700-Q.1799 Q.2000-Q.2999 Q.2000-Q.2099 Q. 2 1 00-Q. 2 1 99 Q.220O-Q.2299 Q.26004.2699 4.2700-Q.2899 4.2900-Q.2999 For further details, please refer to the list of TU-T
7、Recommendations. ITU-T Recommendation Q.2630.2 AAL type 2 signalling protocol - Capability set 2 Summary This Recommendation specifies the inter-node protocol and nodal functions that control AAL type 2 point-to-point connections. The AAL type 2 signalling protocol specified in this Recommendation i
8、s usable in switched and non-switched environments and can operate in public or private networks over a range of signalling transport protocol stacks. It also provides maintenance capabilities, carriage of user-plane protocol stack information and carriage of an identifier to link the connection con
9、trol protocol with other higher layer control protocols. This Recommendation specifies the extensions to the AAL type 2 signalling protocol (Capability set i) to support the selection of AAL type 2 path, the indication of SSCS for audio extended, the indication of SSCS for multirate extended, the AA
10、L type 2 path redirection request, and the modification of AAL type 2 connection resources during the established phase of the AAL type 2 connection. Source ITU-T Recommendation Q.2630.2 was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 6 December
11、 2000. ITU-T Q.2630.2 (12/2000) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, o
12、perating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn
13、, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 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
14、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 to the possibility that the practice or implementation of this Recommendation may in
15、volve 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 outside of the Recommendation development process. As of the date of approval of this Re
16、commendation, 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 are therefore strongly urged to consult the TSB patent database
17、. o mu 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 from ITU. 11 ITU-T Q.2630.2 (12/2000) CONTENTS Page 1 2 2.1 2.2 3 4 5 5.1 5.3 6 7 7 .
18、1. 7.2 7.3 7.4 Scope . References Normative references Bibliography . Definitions Abbreviations . General framework of the AAL type 2 signalling protocol Interface between the AAL type 2 signalling entity and the AAL type 2 served 5.1.1 5.1.2 Primitives between AAL type 2 signalling entities and the
19、 AAL type 2 served user . 5.1.3 Parameters between AAL type 2 signalling entities and the AAL type 2 served user . Interface between the AAL type 2 signalling entity and the generic signalling transport . Interface between the AAL type 2 signalling entity and layer management . user Service provided
20、 by the AAL type 2 signalling entity Forward and backward compatibility Format and coding of AAL type 2 signalling protocol Coding conventions for the AAL type 2 signalling protocol Format and coding of the AAL type 2 signalling protocol messages . 7.2.1 AAL type 2 signalling protocol messages 7.2.2
21、 Parameters of the AAL type 2 signalling protocol messages Parameter specification of the AAL type 2 signalling protocol messages 7.3.14 Path Type 7.3.15 7.3.16 7.3.17 7.3.18 Preferred Service Specific Information (Multirate Extended) . 7.3.19 Preferred Link Characteristics 7.3.20 7.3.2 1 7.3.22 Ser
22、ved User Correlation ID Field specification of the AAL type 2 signalling protocol parameters . 7.4.19 Audio Extended service . 7.4.20 Multirate Extended service Service Specific Information (Audio Extended) . Service Specific Information (Multirate Extended) Preferred Service Specific Information (A
23、udio Extended) Modify Support for Link Characteristics Modify Support for Service Specific Information . 1 1 1 2 2 2 3 3 3 3 5 6 6 6 7 7 7 7 7 9 10 10 10 10 11 11 11 11 11 11 12 13 . ITU-T Q.2630.2 (12/2000) ill 8 8.1 8.2 8.3 8.4 7.4.21 AAL type 2 Path QoS Codepoint . 7.4.22 Served User Correlation
24、ID value Procedure of the AAL type 2 signalling protocol Compatibility . Nodal functions 8.2.1 8.2.2 Nodal functions for AAL type 2 nodes with served user interaction . Nodal functions for AAL type 2 nodes without served user interaction Protocol entity General protocol error handling . 8.3.2 Outgoi
25、ng protocol procedures 8.3.3 Incoming protocol procedures 8.3.4 Maintenance protocol procedures . 8.3.1 List of timers Annex A . Support for non-switched scenario . Annex B . Coding of the compatibility information B.l Coding of the compatibility information for networks using Link Characteristics .
26、 B . 1.1 Message compatibility . B.1.2 Parameter compatibility . Coding of the compatibility information for networks not ushg link characteristics . B.2 B.2.1 Message compatibility . B.2.2 Parameter compatibility . Annex C . Handling of the Link Characteristics and SSCS Information in conjunction C
27、 . 1 C.2 C.3 with the modification procedures Preferred Link Characteristics parameter present Preferred Link Characteristics parameter not present Handling of the Service Specific Information parameter . Handling SSCS Information parameters for Audio Service Handling SSCS Information parameters for
28、 Multirate Service . C.3.1 C.3.2 Appendix I . Example message sequences 1.6 Successful modification 1.7 Unsuccessful modification 1.8 Modification collision . Page 14 14 14 14 15 15 19 22 22 22 31 39 39 39 40 40 40 40 41 41 42 43 43 44 44 45 45 46 46 46 47 iv ITU-T Q.2630.2 (12/2000) ITU-T Recommend
29、ation Q.2630.2 AAL type 2 signalling protocol - Capability set 2 1 Scope This Recommendation extends the AAL type 2 signalling protocol (capability set i) specified in ITU-T Q.2630.1 1 i to SUPPO: the selection of AAL type 2 path according to the requested Path Type as a part of the the support of t
30、he revised ITU-T 1.366.2 13; the AAL type 2 path redirection request; and the modification of AAL type 2 connection resources (i.e. AAL type 2 Link Characteristics routing function; e e and Service Specific Convergence Sublayer information) during the established phase of the connection. The scope s
31、pecified in clause 1/Q.2630.1 1 I shall apply with the last paragraph revised as follows. This Recommendation is based on the requirements defined in ITU-T Q-series Supplement 33 28 “Technical Report TRQ.2401: Transport control signalling requirements - Signalling requirements for AAL type 2 link co
32、ntrol capability set 2“. The functional architecture in Figure 1-1/Q.2630.1 i i shall apply. NOTE - The numbering of clauses, subclauses, tables, and figures in this Recommendation is the same as in ITU-T 4.2630.1, if they correspond directly. 2 References 2.1 Normative references The following ITU-
33、T Recommendations and other references 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; users of this Recommendation
34、 are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. i ITU-T 1.363.2 (2000), B-ISDN ATM Adaptation Layer specification: Type 2
35、 AAL. 2 ITU-T 1.361 (1999), B-ISDN ATM layer specification. 3 ITU-T X.200 (1994) I ISO/IEC 7498-1:1994, Information technology - Open Systems Interconnection - Basic Reference Model: The basic model. 4 ITU-T X.210 (1993) I ISO/IEC 10731:1994, Information technology - Open Systems Interconnection - B
36、asic Reference Model: Conventions for the definition of OSI services. 5 ITU-T X.213 (1995) I ISO/IEC 8348:1996, Informution technology - Open Systems Interconnection - Network service definition. 6 ITU-T Q.850 (1998), Usage of cause and location in the Digital Subscriber Signalling System No. I and
37、the Signalling System No. 7 ISDN user part. 7 ITU-T 4.2610 (1999), Usage of cause and location in B-ISDN user part and DSS2. ITU-T Q.2630.2 (12/2000) 1 ITU-T 1.366.1 ( 1998), Segmentation and Reassembly Service Specific Convergence Sublayer for the AAL type 2. ITU-T E. 164 (1997), The international
38、public telecommunication numbering plan. IEEE 802-1990, IEEE Standards for Local and Metropolitan Area Networks: Overview and Architecture. ITU-T Q.2630.1 (1999), AAL type 2 signalling protocol - Capability set 1. ITU-T 1.356 (2000), B-ISDN ATM layer cell transfer pe$ormance. ITU-T 1.366.2 (2000), A
39、AL type 2 service specific convergence sublayer for narrow-band services. Bibliography The Bibliography specified in 2.2/Q.2630.1 1 i shall apply with the following addition: 28 ITU-T Q-series Supplement 33 (2000), Technical Report TRQ.2401: Transport control signalling requirements - Signalling req
40、uirements for AAL type 2 link control capabiliiy set 2. 3 Definitions The definitions specified in clause 3/Q.2630.1 1 i shall apply with the following additions: 3.1 AAL type 2 requested path type: Information that describes the AAL type 2 Path Type. These Path Types may be “stringent class“, “tole
41、rant class“, or “stringent bi-level class“ (see ITU-T 1.356 121). 3.2 AAL type 2 connection resource: Describe the attributes of the AAL type 2 links making up the connection, and the Service Specific Convergence Sublayer resources used at the AAL type 2 end points. 3.3 3.4 3.5 and as deployed in a
42、network operating with signalling defined in ITU-T Q.2630.1 1 i. connection resource: (See “AAL type 2 connection resource“). requested path type: (See “AAL type 2 requested path type“). network default stringent QoS class: A stringent QoS class as defined in ITU-T 1.356 12 4 Abbreviations The abbre
43、viations specified in clause 4/Q.2630.1 1 i shall apply with the following additions: LB Loopback LC Link Characteristics (Note) MOA Modification Acknowledge mes sage MOD Modification Request message MOR Modification Reject message MSLC MSSSI PLC Preferred Link Characteristics PSSCS Preferred SSCS I
44、nformation PSSIAE Modify Support for Link Characteristics Modify Support for SSCS Information Preferred Service Specific Information (Audio Extended) 2 ITU-T Q.2630.2 (12/2000) PSSIME PT Path Type RC Rate Control SSIAE SSIvE SUC1 Served User Correlation ID SYN NOTE - In ITU-T Q.2630.1 1 11, the abbr
45、eviation “ALC“ was used instead of “LC“. Preferred Service Specific Information (Multirate Extended) Service Specific Information (Audio Extended) Service Specific Information (Multirate Extended) Synchronization of change in SSCS operation 5 The general framework of the AAL type 2 signalling protoc
46、ol specified in clause 5/Q.2630.1 113 shall apply. General framework of the AAL type 2 signalling protocol 5.1 Interface between the AAL type 2 signalling entity and the AAL type 2 served user 5.1.1 Service provided by the AAL type 2 signalling entity Clause 5.1. uQ.2630.1 111 shall be replaced by t
47、he following paragraphs: The AAL type 2 signalling entity provides the following services to the AAL type 2 served user across the A2SU-SAP: 0 establishment of AAL type 2 connections; release of AAL type 2 connections; and modification of AAL type 2 connection resources. a a Consistent with item f)
48、of 5.1.3/Q.2630.1 1 i, the same also applies to the modification procedures specified in this Recommendation. The AAL type 2 signalling protocol entity is independent of the AAL type 2 served user. 5.1.2 In addition to the cases specified in 5.1.2/Q.2630.1 li, the A2SU-SAP primitives are used after
49、successful modification capability negotiation during AAL type 2 connection establishment: 3) by the modification sending served user to originate, and the modification receiving served user to respond to, an AAL type 2 connection resource modification request; and 4) by the AAL type 2 signalling entities to indicate a modification of the AAL type 2 connection resource to the modification receiving served user and notify the modification originating served user of the successful or unsuccessful modification. The services are provided
