1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Series QTELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 39(03/2002) SERIES Q: SWITCHING AND SIGNALLING Technical Report TRQ.2700: Requirements for signalling in access networks that support BICCITU-T Q-series Recommendations Supplement 39 ITU-T
2、 Q-SERIES RECOMMENDATIONS 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
3、 OF SIGNALLING 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
4、 SYSTEMS Q.600Q.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 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREME
5、NTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS 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. Q series Supplement 39 (03/2002) i Supplement 39 to ITU-T Q-seri
6、es Recommendations Technical Report TRQ.2700: Requirements for signalling in access networks that support BICC Summary This Supplement to ITU-T Q-Series Recommendations is a technical report on the procedures, information flows and information elements needed for signalling in Access Networks that s
7、upport Bearer Independent Call Control (BICC). It defines the requirements for signalling to control bearer connections and to relay call-related information across the Access Network. Source Supplement 39 to ITU-T Q-series Recommendations was prepared by ITU-T Study Group 11 (2001-2004) and approve
8、d under ITU-T Recommendation A.13 (10/2000) procedure on 1 March 2002. ii Q series Supplement 39 (03/2002) 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
9、 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 Telecommunication Standardization Assembly (WTSA), which meets every four years,
10、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 WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessar
11、y standards are prepared on a collaborative basis with ISO and IEC. NOTE In this publication, 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 possibi
12、lity that the practice or implementation of this publication may 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 public
13、ation development process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementors are cautioned that this may not represent the latest information and are t
14、herefore strongly urged to consult the TSB patent database. ITU 2002 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Q series Supplement 39 (03/2002) iii CONTENTS Page 1 Scope of signalling requirements for acc
15、ess networks that support BICC. 1 2 References. 3 3 Definitions 5 3.1 Definitions of Signalling Associations. 5 3.2 Functional Model Definitions. 5 3.3 Definition of Signalling Flow Objects . 7 4 Abbreviations 8 5 Functional Reference Model. 11 6 User Associated Logical Port Configurations 14 7 ACN-
16、E control configurations 15 8 BICC access network information objects . 17 9 Information objects shown within reference models 19 10 Access network information flow model 20 11 Indirect user network interface flow template 20 12 Direct concentrator interface template 20 13 Indirect concentrator inte
17、rface flow template. 21 14 Indirect concentrator with transit interface flow template 22 15 Access network information flows . 23 15.1 Description of access network information flows 24 15.1.1 Definition of action identifier (Backward/forward bearer establishment) . 25 15.2 Access network informatio
18、n flows for stimulus terminals on the ISN 25 15.2.1 Terminal originated Forward bearer setup 25 15.2.2 Terminal originated Backward bearer setup 25 15.2.3 Network originated Backward bearer setup 25 15.2.4 Network originated Forward bearer setup. 26 15.2.5 Terminal originated Intra-ISN Call Stimulus
19、-based. 26 15.2.6 Terminal released ISN-A owned BNC 26 15.2.7 Terminal released ACN-E owned BNC 26 15.2.8 Network released ISN-A owned BNC 26 15.2.9 Network released ACN-E owned BNC. 27 15.3 Call admission 28 15.3.1 Call admission Terminal originated Stimulus-based 29 iv Q series Supplement 39 (03/2
20、002) Page 15.3.2 Call admission Network originated Stimulus-based 32 15.4 Bearer establishment 33 15.4.1 Bearer establishment ISN-A to ACN-E Terminal independent . 34 15.4.2 Bearer establishment ACN-E to ISN-A Terminal independent . 39 15.4.3 Bearer establishment ACN-E(1) to ACN-E(2) Terminal indepe
21、ndent 43 15.4.4 Bearer establishment through ACN-T ISN-A to ACN-E Terminal independent. 49 15.4.5 Bearer establishment through ACN-T ACN-E to ISN-A Terminal independent. 57 15.4.6 Bearer cut-through in ACN-T Terminal independent . 61 15.5 Call establishment 62 15.5.1 Call establishment Terminal orig
22、inated Stimulus-based 63 15.5.2 Call establishment Network originated Stimulus-based. 67 15.5.3 Call establishment Network originated Stimulus-based PABX trunk . 72 15.5.4 Intra-ISN call establishment Terminating ACN-E Stimulus-based . 77 15.6 Call release . 80 15.6.1 Call release Terminal released
23、Stimulus-based 80 15.6.2 Call release Network released Stimulus-based. 84 15.7 Bearer release . 87 15.7.1 Bearer release ISN-A to ACN-E Terminal independent. 87 15.7.2 Bearer release ACN-E to ISN-A Terminal independent 90 15.7.3 Bearer release through ACN-T ISN-A to ACN-E Terminal independent. 94 15
24、.7.4 Bearer release through ACN-T ACN-E to ISN-A Terminal independent. 99 15.8 Access network information flows for functional terminals on the ISN 101 15.8.1 Terminal originated Forward bearer setup 101 15.8.2 Terminal originated Backward bearer setup 101 15.8.3 Network originated Backward bearer s
25、etup 101 15.8.4 Network originated Forward bearer setup. 101 15.8.5 Terminal originated Intra-ISN Call Function-based. 102 15.8.6 Terminal released ISN-A owned BNC 102 15.8.7 Terminal released ACN-E owned BNC 102 15.8.8 Network released ISN-A owned BNC 102 15.8.9 Network released ACN-E owned BNC. 10
26、2 15.9 Call admission 103 15.9.1 Call admission Terminal originated Function-based 103 15.9.2 Call admission Network originated Function-based 106 15.10 Call establishment 107 15.10.1 Call establishment Terminal originated Function-based 108 15.10.2 Call establishment Network originated Function-bas
27、ed. 113 Q series Supplement 39 (03/2002) v Page 15.11 Call release . 117 15.11.1 Call release Terminal released Function-based 117 15.11.2 Call release Network released Function-based. 120 16 Interface Mediation Node (IMN) functional description 123 16.1 Description of information flows in the IMN c
28、onfiguration 125 16.2 Information flows for stimulus terminals. 125 16.2.1 Terminal originated Forward bearer setup 125 16.2.2 Terminal originated Backward bearer setup 125 16.2.3 Network originated Backward bearer setup 126 16.2.4 Network originated Forward bearer setup. 126 16.2.5 Terminal origina
29、ted Intra-IMN Call Stimulus-based . 126 16.2.6 Terminal released SN owned BNC . 126 16.2.7 Terminal released ACN-E owned BNC 126 16.2.8 Network released SN owned BNC 126 16.2.9 Network released ACN-E owned BNC. 127 16.3 Information flows for functional terminals 127 16.3.1 Terminal originated Forwar
30、d bearer setup 127 16.3.2 Terminal originated Backward bearer setup 127 16.3.3 Network originated Backward bearer setup 127 16.3.4 Network originated Forward bearer setup. 127 16.3.5 Terminal originated Intra-IMN call Function-based 127 16.3.6 Terminal released SN owned BNC . 128 16.3.7 Terminal rel
31、eased ACN-E owned BNC 128 16.3.8 Network released SN owned BNC 128 16.3.9 Network released ACN-E owned BNC. 128 16.4 Call admission 128 16.5 Bearer establishment 129 16.5.1 Backward bearer establishment for terminal originated calls Terminal independent. 130 16.5.2 Forward bearer establishment for n
32、etwork originated calls Terminal independent. 133 16.5.3 Forward bearer establishment for terminal originated calls Terminal independent. 137 16.5.4 Backward bearer establishment for network originated calls Terminal independent. 141 16.6 Call establishment 143 16.6.1 Call establishment Terminal ori
33、ginated Stimulus-based 144 16.6.2 Call establishment Terminal originated Function-based 148 16.6.3 Call establishment Network originated Stimulus-based. 153 16.6.4 Call establishment Network originated Function-based. 157 vi Q series Supplement 39 (03/2002) Page 16.7 Call release . 161 16.7.1 Call r
34、elease Terminal released Stimulus-based 162 16.7.2 Call release Terminal released Function-based 166 16.7.3 Call release Network released Stimulus-based. 170 16.7.4 Call release Network released Function-based. 174 16.8 Bearer release . 177 16.8.1 Bearer release ACN-E to SN Terminal independent 178
35、16.8.2 Bearer release SN to ACN-E Terminal independent 181 17 Summary guide to information flows. 182 Q series Supplement 39 (03/2002) 1 Supplement 39 to ITU-T Q-series Recommendations Technical Report TRQ.2700: Requirements for signalling in access networks that support BICC 1 Scope of signalling r
36、equirements for access networks that support BICC BICC Access provides functional reference model, signalling flows, and requirements for signalling in Access Networks that support Bearer Independent Call Control. Within the scope of the BICC access requirement are three types of access configuratio
37、ns, as seen from the perspective of the BICC network. These access configurations are: 1) Direct User Network Interface Configuration (BICC connected to the uni); 2) Network to Network Interface Configuration (BICC connected to the nni); and 3) Indirect User Network Interface Configuration (BICC con
38、nected to the Access Network Interface (ani). These three access configurations are illustrated in Figure 1. Practical examples of access configuration 1 are DSS1 and analogue loop access to BICC. Practical examples of access configuration 2 are ISUP and SIP access to BICC, while practical examples
39、of access configuration 3 are DSS1 and analogue loop access to BICC across a packet interface over Digital Subscriber Line (DSL) or Hybrid Fiber Coax (HFC) backbone. T11115285-02uninnianiTETETETETETEOther Service Supplier NetworkBICC Service Supplier NetworkAccessNetworkCall Control SignallingCall C
40、ontrol SignallingCall Control SignallingCall Control SignallingFigure 1 Network topologies and reference points for BICC access This Supplement provides functional reference model, signalling flows, and requirements for the support of Access Networks in Bearer Independent Call Control. It extends Be
41、arer Independent Call Control across the Access Network, which extends from the local serving node to the location where terminal equipment connects to the network. 2 Q series Supplement 39 (03/2002) T11115290-02unianiACN-EGSNTETEISN/IMN“A“ISN/IMN“B“BICCService Provider “A“BICCService Provider “B“BI
42、CCAccessNetworkCall Control Signalling“uni“ Logical PortACN-TorSWNFigure 2 BICC access network and scope In Figure 2, the two terminals representing two different users each served by a different BICC Service Provider. These two users are connected to the same ACN-E via separate Logical Ports. In Fi
43、gure 2, the BICC Service Providers are attached to the BICC Access Network via separate Access Concentration Nodes Transit (ACN-Ts) or Switching Nodes (SWNs). A single ACN-T or a single SWN could also be used. If an ACN-T is used, a bearer transport technology could be used within the Access Network
44、 that is different from the bearer transport technology used between the ACN-T and the BICC Service Provider Network. Even though two independent BICC Service Providers are shown in Figure 1, the importance is that more than a single ISN/IMN should be allowed to have a signalling and transport relat
45、ionship with an ACN-E. These ISN/IMNs may be in a single Service Provider Network domain or in separate Service Provider domains. A single User, however, would be associated with a single ISN/IMN. The initial high-level requirements for the BICC access network include the following capabilities. Oth
46、er capabilities such as transport over IP bearers are not precluded if they are already described for the BICC core network. 1) The following call control protocols shall be supported: Analogue Loop, DSS1, DSS2. 2) The following bearer control protocols shall be supported: DSS2 as specified in ITU-T
47、 Rec. Q.2931, AAL Type 2 Signalling as specified in ITU-T Rec. Q.2630.2, IPBCP as specified in ITU-T Rec. Q.1970. Including other bearer protocols that may be supported by the BICC protocol. 3) Interworking with the following protocols shall be supported: V5.1, V5.2. Q series Supplement 39 (03/2002)
48、 3 2 References The following is a list of informative references for Access Network signalling: 1 ITU-T Recommendation I.363.1 (1996), B-ISDN ATM Adaptation Layer specification: Type 1 AAL. 2 ITU-T Recommendation I.363.2 (2000), B-ISDN ATM Adaptation Layer specification: Type 2 AAL. 3 ITU-T Recomme
49、ndation I.366.1 (1998), Segmentation and Reassembly Service Specific Convergence Sublayer for the AAL type 2. 4 ITU-T Recommendation I.366.2 (2000), AAL type 2 service specific convergence sublayer for narrow-band services. 5 ITU-T Recommendation Q.115 (1999), Logic for the control of echo control devic
