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    ITU-T Q 1902 4-2001 Bearer Independent Call Control Protocol (Capability Set 2) Basic Call Procedures Series Q Switching and Signalling Specifications of Signalling Related to Bearup.pdf

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    ITU-T Q 1902 4-2001 Bearer Independent Call Control Protocol (Capability Set 2) Basic Call Procedures Series Q Switching and Signalling Specifications of Signalling Related to Bearup.pdf

    1、INTERNATIONAL TELECOMMUNICATION UN ION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.1902.4 (071200 1 ) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent Call Control (BICC) Bearer independent call control protocol (Capability Set 2): Basic call

    2、procedures ITU-T Recommendation Q. 1902.4 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING 1 SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE IPJTERP!ATICh!AL ?LJOMAT!C Ah9 SEMI-AUTOMATIC Tvt“RK113C FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No

    3、. 4 AND 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 43 INTERFACE DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOB

    4、ILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK I CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS I SIGNALLING REOUIREMENTS AND PROTOCOLS FOR IMT-2000 . SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL I (BICC) - BROADBAND ISDN Q.1-Q.3 4.4-Q.59 4.60-4.9

    5、9 Q. 100-Q.119 Q. 120-Q.249 Q.250-Q.309 Q.310-Q.399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 4.700-4.799 Q.850-Q.999 Q. 1000-Q.1099 Q.1 iO0-Q. 1 199 Q.1200-Q.1699 Q.1700-Q.1799 Q.1900-4.1999 Q.26Q.2999 Q.800-Q.849 Il For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommenda

    6、tion Q.1902.4 Bearer independent call control protocol (Capability Set 2): Basic call procedures Summary This Recommendation describes the Bearer Independent Call Control (BICC) basic call procedures for the suppoh of narrow-band ISDN services independent of the bearer technology and signalling mess

    7、age transport technology used (Capability Set 2). Source ITU-T Recommendation 4.1902.4 was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 2 July 2001. The modifications indicated in Corrigendum 1 (04/02) have already been included in this Recommend

    8、ation. ITU-T Rec. 4.1902.4 (07/2001) 1 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecomunicatiens. The IT1 Telecommunication Standardization Sector (ITLT-T) is a permanent organ of ITU. ITU-T is responsible for studying technic

    9、al, operating 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

    10、 turn, 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 EC. N

    11、OTE 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 ma

    12、y involve 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 thi

    13、s Recommendation, 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 da

    14、tabase. O ITU 2002 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 Rec. 4.1902.4 (07/2001) CONTENTS Page 1 2 3 4 5 6 6.1 6.2 6.

    15、3 6.4 7 7.1 7.2 Scope . References . Definitions Abbreviations Conventions General Introduction to Recommendation structure Messages. parameters and information elements . Use of Application Transport Mechanism 6.3.1 Introduction . 6.3.2 Application Transport Instruction Indicators .6. 3.3 Handling

    16、of Addressing Information . 6.3.4 BAT ASE at a CMN Bearer control tunnelling 6.4.1 Bearer control tunnelling procedure Successful basic call set-up . Introduction . Forward address signalling - En bloc operation 7.2.1 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.2.1 O Actions required at the or

    17、iginating SN Actions required at an intermediate SN . Actions required at an intermediate CMN . Actions required at an outgoing gateway CMN Actions required at an incoming gateway SN . Actions required at an outgoing gateway SN Actions required at an incoming gateway CMN . Actions required at the de

    18、stination SN Called party number for operator calls Called number for calls to testing and measuring devices 7.3 Forward address signalling . overlap operation . Actions required at the originating SN Actions required at an intermediate SN/CMN Actions required at the destination SN Outgoing bearer s

    19、et-up procedure . Per-call bearer set-up in forward direction Per-call bearer set-up in backward direction . 7.3.1 7.3.2 7.3.3 7.4 7.4.1 7.4.2 ITU-T Rec . 4.1902.4 (07/2001) 1 1 1 1 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 7 9 9 11 12 13 14 14 15 16 16 17 17 18 18 19 . 111 Page 7.4.3 Per-call bearer set-up usi

    20、ng bearer control tunnelling - fast set-up 7.4.4 Per-call bearer set-up using bearer control tunnelling - delayed forward 7.4.5 Pm-call beam Set-up using bearer control tunnelling - delayed bacLavard Incoming bearer set-up procedure 7.5.1 Per-call bearer set-up in forward direction 7.5.2 Per-call be

    21、arer set-up in backward direction . 7.5.3 Per-call bearer set-up using bearer control tunnelling - fast set-up 7.5.4 Per-call bearer set-up using bearer control tunnelling - delayed forward 7.5.5 Per-call bearer set-up using bearer control tunnelling - delayed backward 7.6 Continuity message . Actio

    22、ns required at the originating SN Actions required at an intermediate SN . Actions required at a CMN 7.5 7.6.1 7.6.2 7.6.3 7.6.4 Actions required at the destination SN 7.7 Address complete message or Connect message 7.7.1 7.7.2 7.7.3 7.7.4 7.7.5 7.7.6 Actions required at the destination SN Actions r

    23、equired at an intermediate SN/CMN Actions required at an outgoing gateway SN/CMN Actions required at an incoming gateway SN/CMN . Actions required at the originating SN Internal through connection of the bearer path and awaiting answer indication at the destination SN . 7.8 Answer message . Actions

    24、required at an intermediate SN/CMN Actions required at an outgoing gateway SN/CMN Actions required at an incoming gateway SN/CMN . Actions required at the originating SN Return of answer from automatic terminals 7.9 Access Transport Parameter . 7.1 O Storage and release of Initial Address Message in

    25、formation . 7.8.1 7.8.2 7.8.3 7.8.4 7.8.5 7.8.6 Actions required at the destination SN 8 Additional set-up procedures 8.1 Introduction . 8.2 Call Progress . Actions required at an intermediate SN/CMN Actions required at the originating SN 8.3 Codec Negotiation 8.2.1 8.2.2 8.2.3 Actions required at t

    26、he destination SN iv ITU-T Rec . 4.1902.4 (07/2001) 20 21 33 AL 22 22 23 24 25 26 26 26 26 27 27 27 27 27 28 28 28 28 29 29 29 29 29 30 30 30 30 30 30 30 31 31 31 31 8.4 8.5 8.6 8.7 8.8 8.9 8.10 8.1 1 8.12 8.13 8.14 8.15 8.16 8.17 8.3.1 8.3.2 8.3.3 8.3.4 8.3.5 8.3.6 Abnormal cases Echo Control . 8.4

    27、.1 General . 8.4.2 Procedures . SN initiating codec negotiation . SN transiting codec negotiation . SN terminating codec negotiation . Incoming bearer set-up procedure . Outgoing bearer Set-up procedure . Propagation delay procedure Signalling procedures for connection type allowing fallback 8.5.1 P

    28、rocedure . 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 Actions in the forward direction Actions in the backward direction - fallback indicated before answer . Actions in the backward direction - fallback indicated at answer Echo control for connection types allowing fallback Transit network selection (national us

    29、e) . Support for Temporary Alternative Routing (TAR) . Actions in the backward direction - fallback does not occur Hop counter procedure 8.9.1 Actions at the initiating SN/CMN . 8.9.2 Actions at an intermediate SNCMN . 8.9.3 Actions at the destination SN Charging Access delivery indication . Informa

    30、tion messages . Sending solicited information (national use) . Receiving a solicited information message (national use) Call collect request procedure . Calling Geodetic location procedure 8.12.1 Requesting information (national use) 8.12.2 8.12.3 Calling party number 8.15.1 Introduction . 8.15.2 Tr

    31、ansfer of Geodetic information Inter-nodal traffic group identification . Sending Inter-nodal traffic group identification Receiving Inter-nodal traffic group identification . Carrier selection information (national use) . .,. 8.16.1 8.16.2 ITU-T Rec . 4.1902.4 (07/2001) Page 31 31 32 32 33 34 34 34

    32、 34 36 36 38 38 39 40 40 40 41 41 41 41 41 42 42 42 42 42 42 43 43 43 43 43 43 44 44 44 44 V 8.18 8.19 8.20 9 9.1 9.2 9.3 . 9.4 9.5 9.6 10 10.1 10.2 10.3 10.4 vi 8.17.1 Action required at the originating SN 8.17.2 Action required at an intermediate SN/CMN within the originating network 8.17.3 Action

    33、 required at an outgoing national gateway SN/CMN 8.17.4 Action required at an incoming national gateway SN/CMN . 8.17.5 Action required at the destination SN 8.17.6 Action required at an international gateway SN/CMN . Global- Call Reference . Bearer Control Unit Identifier (BCU-ID) . 8.19.1 General

    34、. 8.19.2 Actions at an SN 8.19.3 Actions at a CMN 8.19.4 Selection of BCU-ID . 8.19.5 FonvardlBackward Bearer Establishment . Out-of-band transport of DTMF and Tone information . 8.20.1 Introduction . 8.20.2 Procedures . Unsuccessful call set-up . Introduction . Actions at a CSF initiating a release

    35、 message Actions at an intermediate SN/CMN Actions at the controlling SN/CMN (i.e . the SN/CMN controlling the call) . 9.4.1 Actions at a controlling SN . 9.4.2 Actions at a controlling CMN . Tones and announcements 9.5.1 Tones and announcements at an SN 9.5.2 Tones and announcements at a CMN Addres

    36、s incomplete . Mid-call procedures Introduction . Suspend and resume 10.2.1 Suspend 10.2.2 Resume 10.2.3 Expiration of timer T6 or timer T38 Forward Transfer message Codec modificatiodmid-cal1 codec negotiation procedures 10.4.1 10.4.2 SN initiating codec modification . SN terminating codec modifica

    37、tion . ITU-T Rec . 4.1902.4 (07/2001) Page 44 44 44 45 45 45 45 45 45 45 46 46 46 47 47 47 48 48 48 48 49 49 49 49 49 50 50 50 50 50 50 51 52 52 52 53 54 1 1.1 1.2 1.3 11.4 11.5 11.6 11.7 11.8 12 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 12.10 13 10.4.3 10.4.4 SN initiating mid-call codec negotia

    38、tion . I 0.4.5 10.4.6 10.4.7 Normal call release . Introduction . Release initiated by a calling party . Release initiated by a called party Release initiated by the network . SN transiting codec modification SN temmatrng mid-call cridec negotiatron . SN transiting mid-call codec negotiation Abnorma

    39、l codec modificatiodmid-cal1 codec negotiation cases Release sending procedure Release reception procedure . Charging (national use) . Collision of Release messages Network features . Introduction . Simple segmentation . Pre-release information transport Automatic repeat attempt Blocking and unblock

    40、ing of CIC values . 12.5.1 Introduction . 12.5.2 CIC group blocking procedures . 12.5.3 12.5.4 Abnormal CIC group blocking procedures . ClC group query (national use) 12.6.1 General . 12.6.2 Interactions between CIC blocking and call Set-up procedures Interpretation of CIC states Support for Hard To

    41、 Reach Network Management functions SN/CMN initiating HTR indication SN receiving HTR indication Automatic congestion control . parameter . Actions taken during overload . Signalling transport out-of-service and in-service indications . Signalling transport congestion indications Abnormal conditions

    42、 . :. 12.7.1 12.7.2 12.8.1 Receipt of a release message containing an automatic congestion level 12.8.2 ITU-T Rec . 4.1902.4 (07/2001) Page 55 56 58 59 61 62 62 62 62 63 63 63 64 64 64 64 65 66 66 66 66 67 67 68 69 69 69 70 70 70 71 71 71 72 72 72 vii 13.1 13.2 13.3 13.4 13.5 13.6 13.7 Introduction

    43、. Dual seizure 1 3 2.1 Unguarded interval 13.2.2 Detection of dual seizure . 13.2.3 Preventive action . 13.2.4 Action to be taken on detection of dual seizures . Reset of CICs 13.3.1 Reset CIC procedure 13.3.2 Group reset procedure . 1 3.3.3 Abnormal group reset procedures Receipt of unreasonable si

    44、gnalling information . 13.4.1 13.4.2 13.4.3 13.4.4 13.4.5 13.4.6 13.4.7 13.4.8 Handling of message format errors . Handling of unexpected messages . General requirements on receipt of unrecognized messages and parameters Procedures for the handling of the unrecognized messages or parameters . Proced

    45、ures for the handling of responses indicating unrecognized information has been sent Procedures for handling unreasonable parameters Handling of the BICCError indication primitive . Compatibility for the BICC APM user application . Unequipped CIC message (national use) Overlength messages Timer expi

    46、ries . 13.7.1 Failure in the Reset CIC procedure . 13.7.2 Failure in the Group Reset procedure 1 3.7.3 Failure in the blockingunblocking sequence . 13.7.4 Failure to receive a Release Complete message - Timer T1 and T5 13.7.5 Failure to receive a response to an information request message (national

    47、use) . Annex A . Timers Annex B . Procedures for reuse of idle bearers (network option) . B . 1 Introduction . : . B.2 Procedures . Outgoing bearer set-up procedures B.2.1 B.2.2 B.2.3 Continuity message B.2.4 Codec negotiation B.2.5 Release procedure Incoming bearer set-up procedures Page 72 72 72 7

    48、2 72 73 73 73 74 75 75 75 75 76 80 84 86 86 86 89 90 90 90 90 90 90 90 91 94 94 94 94 95 95 95 95 . v111 ITU-T Rec . 4.1902.4 (07/2001) . Annex C . Test calls C.l Called number for test calls Annex D . Start-up procedures D . 1 Introduction . D.2 Procedure for putting CICs into service . D.3 Test pr

    49、ocedures . Annex E - (Network Option) Procedures for use of Structured AAL1 bearers E . 1 Introduction . E.2 Procedures . E.2.1 Codec negotiation E.2.2 Release procedure Appendix I . Message flow examples . 1.1 1.2 Contents Introduction to message flows Appendix II . Generic BCF functions . II . 1 Introduction . 11.2 BNC-ID . 11.2.1 11.2.2 11.2.3 BNC-ID usage during call and bearer set-up . BNC-ID usage for idle bearer reuse procedure (Network option) BNC-ID usage for structured AAL1 bearers . 11.3 Bearer release control . 11.4 BIWF address . 11.5 BNC characteristics ITU-T Rec . 4.


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