1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.1930TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2002) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent Call Control (BICC) BICC access network protocol ITU-T Recommendation Q.1930 ITU-T Q-SERIES RECOM
2、MENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING
3、SYSTEM No. 4 Q.120Q.139 SPECIFICATIONS OF SIGNALLING SYSTEM No. 5 Q.140Q.199 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.250Q.309 SPECIFICATIONS OF SIGNALLING SYSTEM R1 Q.310Q.399 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q
4、.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPEC
5、IFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. Q.1930 (04/2002) i ITU-T Recommendation Q.1930 BICC access network protocol Summary This Recommendati
6、on describes the protocol for access networks that support Bearer Independent Call Control (BICC). It describes the signalling for BICC access networks serving analogue loops and trunks, ISDN BRA and PRA, and B-ISDN DSS2. Three separate signalling associations are included in the BICC access network
7、 protocol. They are call control, access network control, and remote media control. Source ITU-T Recommendation Q.1930 was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 13 April 2002. ii ITU-T Rec. Q.1930 (04/2002) FOREWORD The International Telec
8、ommunication 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, operating and tariff questions and issuing Recommendations on them
9、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, produce Recommendations on these topics. The approval of ITU-T R
10、ecommendations 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 ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used fo
11、r 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 involve the use of a claimed Intellectual Property Right. ITU takes
12、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, ITU had not received notice of intellectual property
13、, 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. ITU 2002 All rights reserved. No part of this publication may be
14、 reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.1930 (04/2002) iii CONTENTS Page 1 Scope 1 2 References. 3 3 Definitions 4 3.1 Definitions of signalling associations. 4 3.2 Functional model definitions 5 3.3 Definition of Signalling Information Element
15、s and Identifiers 7 3.4 General Definitions 7 4 Abbreviations 8 5 Conventions 10 6 Architecture 11 6.1 Service Architecture . 11 6.1.1 Analogue Loop and Analogue Trunk. 11 6.1.2 ISDN Basic Access. 11 6.1.3 ISDN Primary Access. 11 6.1.4 B-ISDN DSS2 Access 11 6.2 Architecture Discussion 11 6.2.1 ACN-E
16、 Architecture. 11 6.2.2 ISN/IMN Architecture 12 6.3 Protocol Reference Model 12 6.4 Recommendation structure. 14 7 Signalling Identifiers used in the BICC Access Network 14 7.1 Description of Signalling Identifiers 14 7.2 Assignment of User-ID between the ACN-E and CSF 15 8 Signalling Transport Prot
17、ocol Stacks . 15 8.1 Operation of BICC Access Network Signalling Encapsulation. 16 8.1.1 Actions of the Application-Specific Functions 17 8.1.2 Actions of the Message-Multiplex Function 18 9 Coding and Procedures for BICC Access Network Common Header . 19 9.1 Coding for BICC Access Network Common He
18、ader. 19 9.1.1 Requesting and Destination Node Address 19 9.1.2 Pointer. 19 9.2 Procedures for Addressing using the BICC Access Network Common Header. 20 9.2.1 Operation at the ISN/IMN 21 9.2.2 Operation at the ACN-E . 21 iv ITU-T Rec. Q.1930 (04/2002) Page 9.2.3 Operation at the ACN-T . 22 10 Codin
19、g and Procedures for BICC Access Network Messages . 22 10.1 List of Identifiers 26 10.2 User Identifier. 27 10.3 Logical Port Identifier 28 10.4 Connection Identifier 28 10.5 Connection Group Identifier. 28 10.6 Access Control Association Identifier 29 10.7 Application Data. 29 11 Coding and Procedu
20、res for BICC Access Network Call Control. 29 11.1 Procedures for Call Control 30 11.1.1 Successful Call Admission. 30 11.1.2 Successful Call Establishment 31 11.1.3 Normal call release. 33 11.2 Abnormal conditions 34 11.2.1 Receipt of unreasonable signalling information. 34 11.2.2 Handling of messag
21、e format errors 34 11.2.3 Handling of unexpected messages 34 11.2.4 Compatibility for the BICC Access Network Call Control 35 12 Coding and Procedures for Access Network Control. 35 12.1 Formats and Codes for BICC Access Network Control. 36 12.1.1 Coding of Action Indicators Unique to the BICC Acces
22、s Network. 36 12.2 Procedures for BICC Access Network Control 37 12.2.1 Successful Bearer Establishment 37 12.3 Additional set-up procedures 46 12.3.1 Introduction 46 12.3.2 Codec Negotiation 46 12.3.3 Bearer Control Unit Identifier (BCU-ID). 46 12.3.4 Out-of-band transport of DTMF and Tone informat
23、ion. 46 12.3.5 Codec modification/mid-call codec negotiation procedures 47 12.3.6 Connection Group Identifier. 47 12.3.7 Interaction with services invoking bearer redirection 47 12.3.8 Procedures for reuse of idle bearers . 49 12.3.9 Procedures for use of Structured AAL 1 bearers 49 12.4 Normal bear
24、er release. 49 12.4.1 Procedures at the CSF 49 12.4.2 Procedures at the ACN-T . 50 12.4.3 Procedures at the ACN-E . 50 ITU-T Rec. Q.1930 (04/2002) v Page 12.5 Bearer cut-through (optional procedures at ACN-T) . 51 12.6 Cut BNC (optional procedures at ACN-T). 52 12.7 Abnormal conditions 52 12.7.1 Rec
25、eipt of unreasonable signalling information. 52 12.7.2 Handling of message format errors 52 12.7.3 Handling of unexpected messages 53 12.7.4 Compatibility for BICC Access Network Control . 53 12.8 Timers for the BICC Access Network Control Protocol 53 13 Coding and Procedures for Remote Media Contro
26、l . 54 13.1 H.248 Functions Applicable to Remote Media Control. 55 13.2 Procedures for Remote Media Control. 56 13.2.1 Successful Call Admission. 57 13.2.2 Successful Call Establishment 58 13.3 Additional set-up procedures 60 13.3.1 Introduction 60 13.3.2 Echo Control. 61 13.3.3 Out-of-band transpor
27、t of DTMF and Tone information. 61 13.3.4 Interaction with services invoking bearer redirection 61 13.4 Normal call release. 62 13.5 Bearer cut-through procedures . 63 13.6 Cut BNC procedures. 64 13.7 Abnormal conditions 64 13.7.1 Receipt of unreasonable signalling information. 64 13.7.2 Handling of
28、 message format errors 65 13.7.3 Handling of unexpected messages 65 13.7.4 Compatibility for the BICC Remote Media Control 65 Appendix I BICC Access Network Q.921 Relay 66 I.1 Description of Changes to the BICC Access Network Protocol 66 I.2 Protocol Stacks . 66 I.3 Service Access Point to the Q.931
29、 Signalling Layer at the CSF 66 I.4 Service Access Point to the Q.2150.0 Signalling Transport Layer at the CSF. 67 I.5 Service Access Point to the Q.2150.0 Signalling Transport Layer at the ACN-E 67 I.6 Service Access Point to the Q.921 LAPD Relay at the ACN-E. 67 Appendix II BICC Access Network Q.9
30、31 Relay 67 II.1 Protocol Stacks . 67 II.2 Service Access Point to the Q.931 Signalling Layer at the CSF 68 vi ITU-T Rec. Q.1930 (04/2002) Page II.3 Service Access Point to the Q.2150.0 Signalling Transport Layer at the CSF. 68 II.4 Service Access Point to the Q.931 Signalling Layer at the ACN-E. 68
31、 II.5 Service Access Point to the Q.2150.0 Signalling Transport Layer at the ACN-E 68 Appendix III BICC Access Network Q.2931 Relay. 68 III.1 Protocol Stacks . 69 III.2 Service Access Point to the Q.2931 Signalling Layer at the CSF 69 III.3 Service Access Point to the Q.2150.0 Signalling Transport L
32、ayer at the CSF. 69 III.4 Service Access Point to the Q.2931 Signalling Layer at the ACN-E. 69 III.5 Service Access Point to the Q.2150.0 Signalling Transport Layer at the ACN-E 69 Appendix IV BICC Access Network G.964 Relay. 70 IV.1 Description of Changes to the BICC Access Network Protocol 70 IV.2
33、 Protocol Stacks . 70 IV.3 Service Access Point to the G.964 Signalling Layer at the CSF 71 IV.4 Service Access Point to the Q.2150.0 Signalling Transport Layer at the CSF. 71 IV.5 Service Access Point to the LAPV5-EF Relay at the ACN-E 71 Bibliography. 71 ITU-T Rec. Q.1930 (04/2002) 1 ITU-T Recomme
34、ndation Q.1930 BICC access network protocol 1 Scope This Recommendation describes the protocol for access networks that support Bearer Independent Call Control (BICC). It defines the access network protocol in terms of formats, codes, and procedures. The protocol defined by this Recommendation is to
35、 be used between “Access Concentration Nodes“ and “Interface Serving Nodes“ or “Interface Mediation Nodes“. This protocol is called the BICC Access Network protocol. It includes three signalling associations: Call Control; Access Network Control; Remote Media Control. Other protocols, not specified
36、by this Recommendation, are used between Access Concentration Nodes and Serving Nodes for the control of bearers. Other protocols, also not specified in this Recommendation, are used between bearer control functions and other access network functions across the vertical associations. The scope of th
37、is Recommendation is illustrated by the highlighted oval in Figure 1. 2 ITU-T Rec. Q.1930 (04/2002) T11115900-02 BCF-R(b)ACF-T(b)ACN-ERMCF-EACN-EBCF-E(q)CSM-RTEBCF-R(b)BCF-R(a)ACF-E ACF-T(b)IMN-ACSM-NRMCF-NACF-NCSFCSFACN-TACN-x ACN-xACN-TRMCF-NISN-ACSM-NBCF-R(a)ACF-NRMCF-ECSM-RACF-ETEBCF-E(q)BCF-N(z
38、)Call controlAccess networkRemote-media-controlBearer controlsignallingAccess networkcontrolScope of BICC access network ProtocolCall controlAccess networkRemote-media-controlBearercontrolAccess networkcontrolScope of BICC access network Protocol(Refer to ITU-T TRQ.2141.1)BICC-enabled networkVertica
39、l associationsFigure 1/Q.1930 Scope of this Recommendation The BICC Access Network ProtocolITU-T Rec. Q.1930 (04/2002) 3 2 References The following ITU-T Recommendations and other references contain provision, which, through reference in this text, constitute provisions of this Recommendation. At th
40、e time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed belo
41、w. A list of the currently valid ITU-T Recommendations is regularly published. NOTE The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation 1 ITU-T Recommendation G.964 (2001), V-Interfaces at the digital local exchange (LE)
42、V5.1 Interface (based on 2048 kbit/s) for the support of access network (AN). 2 ITU-T Recommendation G.965 (2001), V-Interfaces at the digital local exchange (LE) V5.2 interface (based on 2048 kbit/s) for the support of access network (AN). 3 ITU-T Recommendation H.248.1 (2002), Gateway control prot
43、ocol: Version 1. 4 ITU-T H-series Recommendations Supplement 2 (2002), H.248.x sub-series packages guide-Release 2. 5 ITU-T Recommendation H.248.2 (2000), Gateway control protocol: Facsimile, text conversation and call discrimination packages. 6 ITU-T Recommendation H.248.3 (2000), Gateway control p
44、rotocol: User interface elements and action packages. 7 ITU-T Recommendation H.248.6 (2000), Gateway control protocol: Dynamic tone definition package. 8 ITU-T Recommendation H.248.7 (2000), Gateway control protocol: Generic announcement package. 9 ITU-T Recommendation H.248.8 (2000), Gateway contro
45、l protocol: Error codes and service change reason description. 10 ITU-T Recommendation H.248.10 (2001), Gateway control protocol: Media gateway resource congestion handling package. 11 ITU-T Recommendation Q.765.5 (2000), Signalling System No. 7 Application transport mechanism: Bearer Independent Ca
46、ll Control (BICC). 12 ITU-T Recommendation Q.921 (1997), ISDN user-network interface Data link layer specification. 13 ITU-T Recommendation Q.931 (1998), ISDN user-network interface layer 3 specification for basic call control. 14 ITU-T Recommendation Q.2931 (1995), Digital Subscriber Signalling Sys
47、tem No. 2 User-Network Interface (UNI) layer 3 specification for basic call/connection control. 15 ITU-T Recommendation Q.1901 (2000), Bearer Independent Call Control protocol. 16 ITU-T Recommendation Q.1902.1 (2001), Bearer Independent Call Control protocol (Capability Set 2): Functional descriptio
48、n. 17 ITU-T Recommendation Q.1902.2 (2001), Bearer Independent Call Control protocol (Capability Set 2) and Signalling System No. 7 ISDN user part: General functions of messages and parameters. 4 ITU-T Rec. Q.1930 (04/2002) 18 ITU-T Recommendation Q.1902.3 (2001), Bearer Independent Call Control pro
49、tocol (Capability Set 2) and Signalling System No. 7 ISDN user part: Formats and codes. 19 ITU-T Recommendation Q.1902.4 (2001), Bearer Independent Call Control protocol (Capability Set 2): Basic call procedures. 20 ITU-T Recommendation Q.1902.5 (2001), Bearer Independent Call Control protocol (Capability Set 2): Exceptions to the Application transport mechanism in the context of BICC. 21 ITU-T Recommendation Q.1902.6 (2001), Bearer Independent Call Control protocol (Capability Set 2): Generic signa
