ITU-T Q 2722 1-1996 B-ISDN User Part - Network Node Interface Specification for Point-to-Multipoint Call Connection Control - Series Q Switching and Signalling Broadband ISDN - B-Inal.pdf

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1、STD*ITU-T RECMN Q.2722-L-ENGL L77b LiAb257L Ob30730 155 m INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Qm2722.1 (07196) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for the network sign a I I in g B-ISDN User Part - N

2、etwork Node Interface s pecif kat ion for poi n t-to-m u I ti poi nt calllconnection control ITU-T Recommendation Q.2722.1 (Previously CCITT Recommendation) STD-ITU-T RECMN Q-2722-L-ENGL 177b Li8b259L Ob30731 091 = ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATION

3、AL MANUAL SERVICE INTERNATIONAL AUTOMATIC 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 RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 D

4、IGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS SLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN General aspec

5、ts ATM adaptation layer Signalling network protocols Common aspects of B-ISDN applicati network signalling and interworking i prc xols for access signalling and B-ISDN application protocols of the network B-ISDN application protocols for access signalling Q.1-Q.3 Q, 4-Q. 59 Q.60-Q.99 Q. 1 OO-Q. 1 19

6、 Q. 120-Q.249 Q.250-Q. 309 Q.310-Q.399 Q.400-Q.499 Q. 5OO-Q. 599 Q.600-Q.699 Q.700-Q.849 Q. 850-Q. 999 Q. 1000-Q. 1 O99 Q.1100-Q.1199 Q.?200-Q.1999 Q.2000-Q.2999 Q.2000-Q.2099 Q .2 I OO-Q .2 1 99 Q.2200-Q.2599 Q.2600-Q.2699 Q.270-Q.2899 Q.2900-Q.2999 Forfirther details, please refer to ITU-T List of

7、 Recommendations STD-ITU-T RECMN Q-2722.L-ENGL L77b E 48b259L Ob30732 T28 ITU-T RECOMMENDATION 4.2722.1 B-ISDN USER PART - NETWORK NODE INTERFACE SPECIFICATION FOR POINT-TO-MULTIPOINT CALL/CONNECTION CONTROL Summary This Recommendation specifies the extensions to the Broadband ISDN User Part to supp

8、ort point-to- multipoint call control. Source ITU-T Recommendation 4.2722.1 was prepared by ITU-T Study Group 1 1 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 9th of July 1996. STD-ITU-T RECMN Q*2722.L-ENGL 179b = 48b2591 Ob30733 Yb4 FOREWORD ITU (International Telec

9、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

10、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 IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval

11、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 ex

12、pression “Administration” is 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

13、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 h

14、adhad 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. O ITU 1997 All

15、 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 the IT. 11 Recommendation 4.2722.1 (07i96) STD-ITU-T RECMN Q.272Z-L-ENGL L99b 48b259L lIb3073Li

16、ATO W 1 1.1 1.2 1.3 1.4 2 2.1 2.2 2.3 2.4 2.5 CONTENTS Overview Scope Normative references Definitions and abbreviations . 1.3.1 Definitions . 1.3.2 Abbreviations Capabilities supported by this Recommendation . Call control. application process functions . Introduction 2.1.1 Primitive interface . 2.

17、1.2 Assignment procedure of VPCINCI and bandwidth for point-to-multipoint network connections Successful call/connection Set-up . Forward address signalling - en bloc Forward address signalling - overlap operation Address Complete request primitive 2.2.4 Progress (basic call) . 2.2.1 2.2.2 2.2.3 - 2

18、.2.5 Answer primitive . 2.2.6 Transit network selection (national option) . 2.2.7 2.2.8 Storage and release of information Simple segmentation (national option) . Unsuccessful callconnection set-up . Lack of resources at the outgoing side 2.3.1 2.3.2 2.3.3 Actions at an exchange receiving an Incomin

19、g - Resources-Rejected primitive 2.3.4 Actions at an exchange receiving a release message . 2.3.5 Address incomplete . Normal callconnection release 2.4.1 General 2.4.2 Drop of a leaf party requested by a root party . 2.4.3 Drop of a leaf party requested by the party itself 2.4.4 Drop of a leaf part

20、y initiated by the network 2.4.5 En bloc release of callconnection requested by the root party . 2.4.6 reference point with a single RELEASE message Suspend, resume (network initiated) Lack of resources at the incoming side . A B-NT2 causing multiple leaf parties to be dropped, initiated at the T, R

21、ecommendation Q.2722.1 (07/96) 2 2 2 2 3 3 4 13 13 14 15 15 16 16 16 16 16 17 17 18 18 18 19 20 20 20 21 21 . 111 2.6 2.7 2.8 2.9 3 3.1 3.2 4 4.1 4.2 4.3 5 5.1 5.2 5.3 5.4 iv Propagation delay determination Error indication primitive . Interaction . 2.8.1 Interaction of point-to-multipoint features

22、and Capability Set 1 supplementary services 2.8.2 Interaction with a leaf party that does not support multipoint procedures 2.8.3 Interaction with a leaf party that is not a broadband user 2.8.4 Interaction of a CS-2.1 node with a CS-1 node . Primitive contents . Maintenance control. application pro

23、cess functions . Reset . 3.1.1 3.1.2 3.1.3 Abnormal reset procedures Actions at reset initiating exchange . Actions at reset responding exchange . Blocking and unblocking of virtual paths B-ISDN User Part messages and parameters Parameter name codes Parameter format and coding 4.2.1 Destination conn

24、ection link identifier . 4.2.2 Origination connection link identifier . Leaf party type Interworking of DSS 2 and B-ISUP for point-to-multipoint callconnections . General 5.1.1 Architectural overview Originating exchange 5.2.1 Sending of IAM . 5.2.3 Receipt of CPG 5.2.4 Receipt of ANM 5.2.5 Receipt

25、of FEL 5.2.6 Sending of REL . . 5.2.2 Receipt of ACM Destination exchange 5.3.1 5.3.2 Interworking with DSS 2 access supporting coincident SB/TB reference Interworking with DSS 2 access supporting T, reference point procedures . point procedures Typical scenarios Recommendation 42722.1 (07/96) Page

26、21 22 24 24 25 25 25 26 29 30 31 32 32 33 33 33 33 33 34 34 34 34 35 38 38 40 41 41 42 43 43 43 45 50 STD-ITU-T RECMN Q-2722-1-ENGL 177b 48b2571 Ob3073b 673 m Page 54 59 Annex A - Message sequence flows . Appendix I - Instruction indicator setting . Recommendation Q.2722.1 (07/96) V STDeITU-T RECMN

27、Q*2722-1-ENGL 177b M 9Bb2591 Ob30737 50T Recommendation Q.2722.1 B-ISDN USER PART - NETWORK NODE INTERFACE SPECIFICATION FOR POINT-TO-MULTIPOINT CALL/CONNECTION CONTROL (Geneva, 1996) 1 Overview 1.1 Scope This Recommendation describes the basic B-ISDN User Part signalling procedures for the Set-up a

28、nd cleardown of national and international B-ISDN CS-2.1 point-to-multipoint network connections. The action to be taken at six exchange types are described: - originating exchange; - intermediate national exchange; - outgoing international exchange; - intermediate international exchange; - incoming

29、 intemational exchange; - destination exchange. Actions common for all exchange types are described only once. Different, or additional actions required for specific types are described in separate subclauses applicable to this type of exchange. This Recommendation is based on the basic B-ISDN User

30、Part signalling procedures specified in Recommendation Q .2764. This Recommendation specifies the procedures for establishing, maintaining, and clearing of network point-to-multipoint connections at the B-ISDN network-node interface. To support new capabilities in B-ISUP beyond Capability Set 2, add

31、itional messages, parameters and/or modification of existing parameters will be used. This Recommendation specifies the following interactions: - - - - interactions of point-to-multipoint features and Capability Set 1 supplementary services; interaction with a leaf party that does not support multip

32、oint procedures; interaction with a leaf party that is not a broadband user; interaction of a CS-2.1 to CS-1 node and CS-1 to CS-2.1 case. 1.2 Normative references The following ITU-T Recommendations, and other references contain provisions which, through reference in this text, constitute provision

33、s 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 Recommendatio

34、ns and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. - ITU-T Recommendation 1.6 1 O (1 995), B-ISDN operation and maintenance principles and functions. Recommendation Q.2722.1 (07/96) 1 STD-IT-T RECMN Q.2722.1-ENGL 199b m 4b257L b30738 44b

35、 - ITU-T Recommendation 4.2650 (1 995), Interworking between Signalling System No. 7 Broadband ISDN User Part (B-ISUP) and Digital Subscriber Signalling System No. 2 (DSS 2). ITU-T Recommendation 4.2721.1 (1996), B-ISDN User Part - Overview of the B-ISDN network node interface signalling Capability

36、Set 2, step I. ITU-T Recommendation 4.2763 (1995), Signalling System No. 7 B-ISDN User Part (B-ISUP) - Formats and codes. ITU-T Recommendation 4.2764 (1995), Signalling System No. 7 B-ISDN User Part (B-ISUP) - Basic call procedures. ITU-T Recommendation 4.293 1 (1 995), Digital Subscriber Signalling

37、 System No. 2 - User-Network Interface (UNI) layer 3 speczjcation for basic calllconnection control. ITU-T Recommendation 4.2971 (1 999, Digital Subscriber Signalling System No. 2 - User-network interface layer 3 specjication for point-to-multipoint calllconnection control. - - - - - 1.3 Definitions

38、 and abbreviations This Recommendation defines the following terms. 1.3.1 Definitions 1.3.1.1 root: The source of the point-to-multipoint connection. 1.3.1.2 leaf: One of the destinations of the point-to-multipoint connection. 1.3.2 Abbreviations This Recommendation uses the following abbreviations.

39、 ATM Asynchronous Transfer Mode B-ISDN CLI Connection Link Identifier Broadband Integrated Services Digital Network 1.4 The following capabilities shall be supported by this Recommendation: i) Establishment of a callconnection containing one point-to-multipoint network connection requested by the ro

40、ot party of the network connection. ii) Addition of one new party, requested by the root party of the network connection. iii) Drop of a leaf party from an existing call/connection, requested by the root party. iv) Drop of a leaf party fkom an existing call/connection, requested by the party itself.

41、 VI Release of the callkonnection, requested by the root party. The capabilities above shall not be combined with narrow-band emulation services. Only unidirectional (forward), single connection point-to-multipoint calllconnections are supported. Only en bloc address signalling is applicable for poi

42、nt-to-multipoint call/connections, Capabilities supported by this Recommendation 2 Recommendation 4.2722.1 (07196) STD.ITU-T RECMN Q=2722=L-ENGL 177b m LIBb2571 b30739 382 D Primitive name Set-up AddrecsComplete 2 Call control, application process functions Types Corresponding B-ISTJP message) Reque

43、ct/Indication Initial Address RequestAndication Address Complete 2.1 Introduction This Recommendation describes the protocol architecture model that is used as a basis for the description. Requesthdication Requesthdication 2.1.1 Primitive interface The point-to-multipoint call control functions in t

44、he application process use the services provided by the SACF primitive interface. These are listed in Table 2-1. The primitives on this interface, in many cases, correspond with B-ISUP messages, this is also indicated in Table 2-1. IAM Acknowledge IAM Reject RequestfIndicatiodResponsel Confirmation

45、Requesthdication IncomingResources-Accepted Incoming-Resources-Rejected Release, Release Complete Answer Release Requesthdication Indication Answer Segmentation - Progress Segment (National use) Error Requesthndication I Call Progress I Tables 2-2 to 2-10 (see 2.9) list the mandatory and optional co

46、ntents for these primitives for the set- up and release of basic calllconnections. 2.1.2 See 2.1.21Q.2764. Assignment procedure of VPCINCI and bandwidth for point-to-multipoint network connections 2.1.2.1 See 2.1.2.114.2764. Management of VPCINCI value and bandwidth of each VPC 2.1.2.2 See 2.1.2.2Q.

47、2764. Assignment procedure of VPCINCI and bandwidth 2.1.2.3 Abnormal conditions See 2.1.2.31Q.2764. 2.2 Successful callkonnection Set-up This clause describes the successful procedures for point-to-multipoint calls where user plane information is multicasted unidirectional from one root party to a s

48、et of leaf parties. These Recommendation Q.2722.1 (07/96) 3 STD-ITU-T RECMN Q=2722-1-ENGL 179b m 4Bb259L b30740 UT4 procedures are activated on receipt of a call request from the B-ISDN access indicating “point-to- multipoint“ in the user plane configuration field of the broadband bearer capability

49、parameter. 2.2.1 Subclause 2.2.1.1 specifies the signalling procedures for the Set-up of the first leaf party of the point- to-multipoint call initiated by the root party. Subclause 2.2.1.2 specifies the signalling procedures for the addition of one new leaf party and for the attachment of the party to the point-to-multipoint (type 2) network connection. This can only be requested by the root party. Forward address signalling - en bloc 2.2.1.1 Forward address signalling - en bloc - Establishment of a callhonnection 2.2.1.1.1 Actions required at the