1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2764 (1 211 999) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for the network signalling Signalling System No. 7 B-ISDN User Part (B-ISUP) - Basic call procedures ITU-T R
2、ecommendation Q.2764 (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 No. 5 SPECIFICATIONS OF SIGNALLING SYSTE
3、M No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIG
4、ENT 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 network protocols Common aspects of B-ISDN application proto
5、cols for access signalling and network signalling and interworking B-ISDN application protocols for the network signalIing B-ISDN application protocols for access signalling Q. 1-4.3 4.4-4.59 Q.lOCrQ.119 Q. 1264.249 4.250-4.309 4.3 10-4.399 4.400-4.499 4.500-4.599 4.600-4.699 4.700-4.849 Q.850-Q.999
6、 Q. 1000-Q. 1099 Q. 1 100-Q. 1199 Q.1200-Q. 1699 Q. 1700-4.1799 Q.2000-4.2999 4.2000-4.2099 4.2100-4.2199 4.2200-4.2299 4.2600-4.2699 4.60-4.99 4.2700-4.2899 4.2900-4.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation 4.2764 Signalling System No. 7 B-IS
7、DN User Part (B-ISUP) - Basic call procedures Summary This ITU-T Recommendation is one of a set of Recommendations that describe the Broadband ISDN User Part for Broadband Signalling Capability Set 1 and beyond. This ITU-T Recommendation describes the procedures relating to: a Basic call setup and c
8、lear down; Maintenance facilities. Source ITU-T Recommendation 4.2764 was revised by ITU-T Study Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 3 December 1999. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field
9、of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World
10、 Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In
11、 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 expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recog
12、nized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Int
13、ellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendatio
14、n. 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 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanic
15、al, including photocopying and microfilm, without permission in writing from the ITU. CONTENTS Page 1 1.1 1.2 1.3 1.4 1.5 2 2.1 2.2 2.3 2.4 General . Scope References Terms and definitions . Abbreviations . Recommendation structure . Call Control. application process functions Introduction 2.1.1 Pri
16、mitive interface . 2.1.2 2.1.3 Assignment procedure of VPCINCI and bandwidth Cell Delay Variation Tolerance Indication . Successful call/connection Set-up . 2.2.1 2.2.2 2.2.3 2.2.4 2.2.5 2.2.6 2.2.7 2.2.8 2.2.9 2.2.10 2.2.1 1 Forward address signalling -En bloc . Forward address signalling - Overlap
17、 operation . Address-Complete request primitive Progress (basic call) Forward-Transfer primitive Transit network selection (national option) Simple segmentation (national option) . Connection-Available Request/Indication primitive Forward address signalling - AESA . Answer primitive . Storage and re
18、lease of information Unsuccessfl calllconnection setup 2.3.1 Lack of resources at the incoming side . 2.3.2 Lack of resources at the outgoing side 2.3.3 Actions at an exchange receiving an Incoming-Resources-Rejected pnmitive 2.3.4 Actions at an exchange receiving a Release message . 2.3.5 Address I
19、ncomplete . . 2.3.6 Tones and announcements 2.3.7 Unable to modify allocated bandwidth . 2.3 -8 Invalid combination of traffic parameters and QoS class . Normal call/connection Release . 2.4.1 General 2.4.2 Release initiated by a calling party 2.4.3 Release initiated by a called party . 1 1 3 3 3 3
20、4 11 12 12 23 27 30 32 33 36 36 36 37 37 38 38 38 38 38 39 39 40 40 40 40 40 41 2.5 2.6 2.7 2.8 2.9 2.10 2.1 1 2.12 2.13 2.4.4 Release initiated by the network . 2.4.5 Pre-release information transport Suspend, Resume (network initiated) . 2.5.1 Suspend (network initiated) 2.5.2 Resume (network init
21、iated) . 2.5.3 Expiration of timers “await network resume“ and “await network resume-international Propagation delay determination 2.6.1 Procedure . Successful modification during active phase 2.7.1 Modify Requesthdication primitive 2.7.2 Modify Response/Confirmation primitive 2.7.3 Connection-Avail
22、able Request/Indication primitive Unsuccessful modification during active phase . 2.8.1 Lack of resources 2.8.2 Actions at an exchange receiving a Modify-Rejected primitive 2.8.3 Actions at an exchange receiving a release primitive after sending Modify 2.8.4 Interworking with nodes not supporting th
23、e capabilities included in this ITU-T Recommendation Request primitive Actions at an exchange receiving a confusion primitive . 2.9.1 Negotiation procedures 2.9.2 Modification procedures . 2.9.3 2.9.4 Frame relay 2.9.5 2.9.6 2.9.7 Individual QoS parameters Interworking with exchanges not supporting
24、the requested ATM traffic capabilities . Cell delay variation tolerance indication . Negotiation of AAL type parameter 2.9.8 Explicit QoS parameter . Error indication primitive . Support for Temporary Alternative Routing (TAR) . Actions at the initiating exchange . Actions at the destination local e
25、xchange . Actions at the intermediate exchange Actions at the originating local exchange . Actions at the destination local exchange . Hop counter procedure . 2.12.1 2.12.2 Actions at an intermediate exchange . 2.12.3 Automatic re-routing (Crankback) . 2.13 -1 2.13.2 2.13.3 Page 41 41 41 42 42 42 43
26、 43 44 44 47 49 50 50 50 51 51 51 51 51 51 52 52 52 52 52 53 53 54 54 54 54 54 55 56 56 2.14 2.15 2.16 2.17 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 Procedures for individual QoS parameters . Cumulative Cell Delay Variation End-to-end transit delay network generated indicator Cell Loss Ratio (CLR) . 2.
27、14.1 2.14.2 2.14.3 Primi tive contents . Modification rules for adjustment of ABR traffic capability during call/connection setup Signalling procedures for negotiation of AAL type parameter 2.17.1 Procedure . Maintenance Control. Application Process fictions Introduction Reset . 3.2.1 3.2.2 3.2.3 Ab
28、normal Reset procedures Actions at Reset initiating exchange . Actions at Reset responding exchange Blocking and unblocking of virtual paths 3.3.1 Initiating blocking . 3.3.2 Initiating unblocking . 3.3.3 Receiving blocking 3.3.4 Receiving unblocking 3.3.5 Abnormal procedures User Part Availability
29、procedure 3.4.1 Inaccessible User Part . 3.4.2 User Part Unavailability - Unknown 3.4.3 Unequipped User Part . Transmission alarm handling . Automatic congestion control . 3.6.1 3.6.2 Receipt of a Release indication or incoming-resources-rejected indication containing an Automatic Congestion Level p
30、arameter . Actions taken during overload B-ISDN User Part signalling congestion control . 3.7.1 General 3.7.2 Procedures . . Destination Availability VPCWPI Consistency Check 3.9.1 Initiating Consistency Check Request . 3.9.2 Receiving Consistency Check Request . 3.9.3 Initiating Consistency Check E
31、nd . 3.9.4 Receiving Consistency Check End . Page 56 56 57 58 58 65 65 65 65 66 66 67 68 69 69 69 69 69 70 70 70 70 71 71 71 71 71 72 72 72 72 72 73 73 73 74 74 . 3.10 4 4.1 4.2 4.3 5 5.1 5.2 5.3 5.4 6 6.1 6.2 6.3 6.4 6.5 6.6 7 3.9.5 Abnormal procedures Primitive contents . Compatibility. Applicatio
32、n Process functions Introduction 4.1.1 Primitive interface . 4.1.2 General requirements on receipt of unrecognized signalling information Procedures for the handling of the unrecognized messages or parameters 4.2.1 Unrecognized Messages - Type A- and Type B-exchanges . 4.2.2 Unrecognized parameters
33、- Type A- and Type B-exchanges . 4.2.3 Unrecognized parameter values Procedures for the handling of responses indicating unrecognized information has been sent . 4.3.1 Type A-exchanges . 4.3.2 Type B-exchanges . Network Interface function . Introduction Primitive Interfaces 5.2.1 MTP interface 5.2.2
34、 AEI interface . Procedures 5.3.1 Message format errors . 5.3.2 Distribution 5.3.3 Primitive mapping . SDL diagrams . Single Association Control Function (SACF) Introduction Outgoing messages . Message and parameter distribution Handling of identifiers 6.4.1 Exceptional procedures . Other lower laye
35、r indication pnmitives 6.5.1 Destination Unavailable indication 6.5.2 Destination-Available indication 6.5.3 Remote-Status indication SDL diagrams . Incoming messages . 6.3.1 . . - . Bearer Connection Control ASE (BCC ASE) Page 74 74 76 76 76 76 80 80 80 81 81 81 81 82 82 82 82 82 83 83 83 83 84 89
36、89 89 93 94 97 98 98 98 98 98 98 105 7.1 7.2 7.3 7.4 7.5 8 8.1 8.2 8.3 8.4 8.5 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 Primitive interface Outgoing BCC ASE . 7.2.1 Bearer connection setup 7.2.2 Bearer connection release 7.2.3 Bearer connection modification procedures Incoming BCC ASE . 7.3.1 Bearer connec
37、tion setup 7.3.2 Bearer connection release 7.3.3 Bearer connection modification Primitive contents . SDL diagrams . Call Control ASE (CC ASE) Primitive interface Outgoing CC ASE Incoming CC ASE Primitive contents . SDL diagrams . Maintenance control ASE (MC ASE) Primitive interface Resource reset .
38、9.2.1 Sending reset . 9.2.2 Receiving reset 9.2.3 Exceptional procedures . 9.3.1 Sending blockingunblocking 9.3.2 Receiving blockinghnblocking . 9.3.3 Exceptional procedures . Resource blocking User part availability 9.4.1 Procedures . 9.4.2 Exceptional procedures . Congestion level parameter Resour
39、ce testing 9.6.1 Sending VPCI Consistency RequestNPCI Consistency Check End 9.6.2 Receiving VPCI Consistency RequesWPCI Consistency Check End . 9.6.3 Exceptional procedures . Primitive contents . SDL diagrams . Page 105 105 105 106 107 108 108 109 110 110 114 125 125 126 127 128 132 143 143 144 144
40、144 144 144 144 145 145 145 145 145 145 146 146 146 146 146 147 10 10.1 10.2 10.3 10.4 10.5 10.6 11 12 12.1 Unrecognized Information ASE (U1 ASE) . Unrecognized parameters . Primitive interface 10.2.1 Received parameters . 10.2.2 Sent parameters . Unrecognized messages 10.3.1 Received messages Confu
41、sion messages . 10.3.2 Sent messages Primitive contents . SDL diagrams . Timers in B-ISUP . Interactions of capabilities Cell Delay Variation Tolerance Indication . 12 . 1 . 1 Cell Delay Variation Tolerance Indication interaction with traffic parameter negotiation at connection establishment 12.1.2
42、Cell Delay Variation Tolerance Indication interaction with connection modification Annex A . B-ISUP specification model A.l Introduction A.2 General model A.3 Application of the specification model . A.3.1 Dynamic modelling aspects A.3.2 Static modelling aspects Annex B - B-ISUP example message sequ
43、ences B . 1 B-ISUP example call setup sequences B.2 Example message flows for negotiation during call setup . B.3 Modification procedures . Example of unsuccessful modification sequence Example modification procedures with negotiation . B.3.1 B.3.2 Example of successful modification sequence for dec
44、reasing bandwidth B.4 B.4.1 B.4.2 Example of successful modification with negotiation Examples of unsuccessful modification with negotiation . Annex C - SDL overview . C.1 Introduction Page 155 155 155 155 155 155 155 155 155 156 156 159 161 161 161 161 161 161 161 163 164 166 168 168 170 171 171 17
45、1 172 172 172 174 174 Page Appendix I - Coding of the message compatibility information subfield Appendix II - Coding of the parameter compatibility information subfield. II.1 Transit at intermediate exchange indicator . 181 179 181 . 11.2 Send notification indicator 181 11.3 Discard parameter indic
46、ator, discard message indicator, release call indicator, pass 181 on not possible indicator . 11.4 Broadbanmarrow-band intenvorking indicator . 182 Appendix III - Illustration of the CDVT indication procedures . 186 Appendix IV - AESA routing examples . 188 IV.1 E.164AESA . 188 IV.2 Non-E. 164 AESA
47、. 188 IV.2.1 E. 164 Called party number required . 188 IV.2.2 Originating network using TNS 189 IV.2.3 E. 164 Called party number not required . 189 ITU-T Recommendation Q.2764 Signalling System No.7 B-ISDN User Part (B-ISUP) - Basic call procedures 1 General 1.1 Scope This ITU-T Recommendation desc
48、ribes the basic B-ISDN User Part signalling procedures for the setup and cleardown of national and intemational B-ISDN Capability Set 1 network connections, and beyond. The actions to be taken at six exchange types are described: e originating exchange; e intermediate national exchange; e outgoing i
49、nternational exchange; e intermediate international exchange; e destination exchange; e incoming international exchange. Actions common for all exchange types are described only once. Different, or additional, actions required in specific exchange types are described in separate subclauses applicable to this type of exchange. The procedures specified in this ITU-T Recommendation relate to B-ISDN Signalling Capability Set 1 , and beyond, basic call, i.e. calls not involving B-ISDN supplementary services. 1.2 References See ITU-T Recommendation 4.2761. 1.3 Terms and definitions See ITU-T
