1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.1912.5TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2004) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent Call Control (BICC) Interworking between Session Initiation Protocol (SIP) and Bearer Independe
2、nt Call Control protocol or ISDN User Part ITU-T Recommendation Q.1912.5 ITU-T 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
3、.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSC
4、RIBER 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 REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CO
5、NTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 General aspects Q.2000Q.2099 Signalling ATM adaptation layer (SAAL) Q.2100Q.2199 Signalling network protocols Q.2200Q.2299 Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking Q.2600Q.2699 B
6、-ISDN application protocols for the network signalling Q.2700Q.2899 B-ISDN application protocols for access signalling Q.2900Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. Q.1912.5 (03/2004) i ITU-T Recommendation Q.1912.5 Interworking between Session Initi
7、ation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part Summary This Recommendation defines the signalling interworking between the Bearer Independent Call Control (BICC) or ISDN User Part (ISUP) protocols and SIP in order to support services that can be commonly supporte
8、d by BICC or ISUP and SIP-based network domains. Source ITU-T Recommendation Q.1912.5 was approved on 12 March 2004 by ITU-T Study Group 11 (2001-2004) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. Q.1912.5 (03/2004) FOREWORD The International Telecommunication Union (ITU) is the Unite
9、d 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 with a view to standardizing telecomm
10、unications 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 Recommendations is covered by the proc
11、edure 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 for conciseness to indicate both a tele
12、communication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of the
13、se mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU
14、 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 Intellectual Property Rights, whether asserted by ITU membe
15、rs 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 Recommendation. However, implementors are cautioned that this may not
16、 represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2004 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.1912.5 (03/2004) iii CONTENTS Page 1
17、Scope 1 2 References. 2 3 Definitions 3 4 Abbreviations 5 5 Methodology. 7 5.1 Conventions for representation of BICC/ISUP PDU . 7 5.2 Conventions for representation of SIP/SDP information . 7 5.3 General principles. 7 5.4 ISUP encapsulation detailed procedures . 9 5.5 sip: and sips: URIs 13 6 Incom
18、ing call interworking from SIP to BICC/ISUP at I-IWU . 13 6.1 Sending of Initial Address Message (IAM) 13 6.2 Receipt of subsequent INVITE 23 6.3 Sending of COT 24 6.4 Receipt of Connect message (CON). 24 6.5 Receipt of ACM . 24 6.6 Receipt of CPG. 25 6.7 Receipt of Answer Message (ANM) 25 6.8 Throu
19、gh connection of the bearer path. 26 6.9 Receipt of Suspend message (SUS) network initiated . 26 6.10 Receipt of Resume message (RES) network initiated 26 6.11 Release procedures at the I-IWU 27 7 Outgoing call interworking from BICC/ISUP to SIP at O-IWU 32 7.1 Sending of the first INVITE. 32 7.2 Re
20、ceipt of SAM after INVITE has been sent. 42 7.3 Receipt of 18X response. 43 7.4 Expiry of timers and sending of early ACM 44 7.5 Receipt of 200 OK INVITE . 44 7.6 Through connection of BICC/ISUP bearer path 45 7.7 Release procedures at the O-IWU 45 7.8 Timers at O-IWU 50 8 Bibliography (informative)
21、. 51 Annex A BICC specific interworking for basic call. 52 A.1 Introduction 52 A.2 Interworking BICC to/from SIP with common media bearer technology and BICC supports “Bearer Control Tunnelling“. 52 A.3 Bearer Control Interworking Function . 55 iv ITU-T Rec. Q.1912.5 (03/2004) Page Annex B Interwork
22、ing for ISDN supplementary services 57 B.1 Interworking of CLIP/CLIR supplementary service to SIP networks 57 B.2 Interworking of COLP/COLR supplementary service to SIP networks 58 B.3 Interworking of Direct-Dialling-In (DDI) supplementary service to SIP networks . 58 B.4 Interworking of Malicious C
23、all Identification (MCID) supplementary service to SIP networks 58 B.5 Interworking of Sub-addressing (SUB) supplementary service to SIP networks . 58 B.6 Interworking of Call Forwarding Busy (CFB)/Call Forwarding No Reply (CFNR)/Call Forwarding Unconditional (CFU) supplementary services to SIP netw
24、orks. 59 B.7 Interworking of Call Deflection (CD) supplementary service to SIP networks . 59 B.8 Interworking of Explicit Call Transfer (ECT) supplementary service to SIP networks. 59 B.9 Interworking of Call Waiting (CW) supplementary service to SIP networks . 59 B.10 Interworking of Call Hold (HOL
25、D) supplementary service to SIP networks . 59 B.11 Interworking of Completion of Calls to Busy Subscriber (CCBS) supplementary service to SIP networks 61 B.12 Interworking of Completion of Calls on No Reply (CCNR) supplementary service to SIP networks 62 B.13 Interworking of Terminal Portability (TP
26、) supplementary service to SIP networks . 62 B.14 Interworking of Conference Calling (CONF) supplementary service to SIP networks. 62 B.15 Interworking of Three-Party Service (3PTY) supplementary service to SIP networks. 62 B.16 Interworking of Closed User Group (CUG) supplementary service to SIP ne
27、tworks . 63 B.17 Interworking of Multi-Level Precedence and Preemption (MLPP) supplementary service to SIP networks 63 B.18 Interworking of Global Virtual Network Service (GVNS) supplementary service to SIP networks 63 B.19 Interworking of International Telecommunication Charge Card (ITCC) supplemen
28、tary service to SIP networks 63 B.20 Interworking of Reverse Charging (REV) supplementary service to SIP networks . 63 B.21 Interworking of User-to-User Signalling (UUS) supplementary service to SIP networks. 64 Annex C 64 C.1 SIP/SIP-I references (normative) . 64 ITU-T Rec. Q.1912.5 (03/2004) v Pag
29、e C.2 The P-Asserted-Identity SIP header extension (normative). 66 Appendix I Interworking scenarios between SIP and BICC. 76 I.1 Scope 76 I.2 Definitions 76 I.3 Abbreviations . 77 I.4 Methodology. 77 I.5 Interworking of SIP accesses to BICC . 77 Appendix II Interworking scenarios between SIP and IS
30、UP 81 II.1 Scope 81 II.2 Definitions 81 II.3 Abbreviations . 82 II.4 Methodology. 82 II.5 Interworking of SIP Access to ISUP 82 Appendix III Interworking scenarios between Profile C (SIP-I) and ISUP 86 III.1 General . 86 III.2 Interworking of ISUP with SIP using Profile C (SIP-I). 87 ITU-T Rec. Q.19
31、12.5 (03/2004) 1 ITU-T Recommendation Q.1912.5 Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part 1 Scope This Recommendation defines the signalling interworking between the Bearer Independent Call Control (BICC) or ISDN User Part (I
32、SUP) protocols and Session Initiation Protocol (SIP) with its associated Session Description Protocol (SDP) at an Interworking Unit (IWU). ISUP is defined in accordance with ITU-T Recs Q.761 to Q.764 and BICC is defined in accordance with ITU-T Recs Q.1902.1 to Q.1902.4. SIP and SDP are defined by t
33、he IETF. The capabilities of SIP and SDP that are needed to interwork with BICC or ISUP are defined in Annex C. An IWU may be stand-alone or may be combined with an ISUP exchange or BICC Interface Serving Node (ISN). It is assumed in this Recommendation that the initial service requests are forwarde
34、d and/or delivered via a trusted Adjacent SIP Node (ASN) within a SIP network domain. The ASN is viewed as a trusted network entity rather than untrusted user entity, and thus the interface between the IWU and the ASN is a Network-to-Network interface (NNI). Where Profile C (SIP-I) is used, it is as
35、sumed that the remote SIP User Agent is able to process ISUP. Support for SIP interworking at a User Network Interface (UNI) is out of scope of this Recommendation. Interworking with forking in the SIP network is not specified in this Recommendation and is for further study. The services that can be
36、 supported through the use of the signalling interworking are limited to the services that are supported by BICC or ISUP and SIP-based network domains. Services that are common in SIP and BICC or ISUP network domains will interwork by using the function of an Interworking Unit (IWU). The IWU will al
37、so handle (through default origination or graceful termination) services or capabilities that do not interwork across domains. The scope of this Recommendation is shown in Figures 1 and 2, respectively. Figure 1 shows the scope of interworking between SIP and ISUP. Items relating to security when in
38、terworking between two signalling systems in this Recommendation are for further study. Figure 1/Q.1912.5 Scope of interworking between SIP and ISUP 2 ITU-T Rec. Q.1912.5 (03/2004) Figure 2 shows the scope of interworking between SIP and BICC. Figure 2/Q.1912.5 Scope of interworking between SIP and
39、BICC ITU-T Supplement 45 to Q-series Recommendations (TRQ.2815) specifies the set of common capabilities supported by the interworking between SIP and BICC/ISUP for three different profiles (A, B, and C) in forms of Tables. Tables 1 and 2 of Supplement 45 (TRQ.2815) specify interworking capabilities
40、 for Profile A, Tables 3 and 4 specify interworking capabilities for Profile B, and Tables 5 and 6 specify interworking capabilities for Profile C (SIP-I), respectively. The details on the capabilities supported by the different profiles, and all profiles in common, are shown in Annex C.1.1.2. Admin
41、istrations may require operators to take into account national requirements in implementing this Recommendation, and in particular, in determining the local trust policy for the IWU. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in
42、this text, constitute provisions of this Recommendation. At the 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 e
43、dition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. All IETF Standards Track RF
44、C directly referenced by this Recommendation are listed in Annex C.1. ITU-T Recommendation Q.731.7 (1997), Stage 3 description for number identification supplementary services using Signalling System No. 7: Malicious call identification (MCID). ITU-T Recommendation Q.732.2 (1999), Stage 3 descriptio
45、n for call offering supplementary services using Signalling System No. 7: Call diversion services: Call forwarding busy, call forwarding no reply, call forwarding unconditional, call deflection. ITU-T Recommendation Q.732.3 (1993), Stage 3 description for call offering supplementary services using S
46、ignalling System No. 7: Call forwarding no answer. ITU-T Recommendation Q.732.4 (1993), Stage 3 description for call offering supplementary services using Signalling System No. 7: Call forwarding unconditional. ITU-T Recommendation Q.732.5 (1993), Stage 3 description for call offering supplementary
47、services using Signalling System No. 7: Call deflection. ITU-T Recommendation Q.732.7 (1996), Stage 3 description for call offering supplementary services using Signalling System No. 7: Explicit call transfer. ITU-T Rec. Q.1912.5 (03/2004) 3 ITU-T Recommendation Q.733.1 (1992), Stage 3 description f
48、or call completion supplementary services using Signalling System No. 7: Call waiting (CW). ITU-T Recommendation Q.733.2 (1993), Stage 3 description for call completion supplementary services using Signalling System No. 7: Call hold (HOLD). ITU-T Recommendation Q.733.3 (1997), Stage 3 description fo
49、r call completion supplementary services using Signalling System No. 7: Completion of calls to busy subscriber (CCBS). ITU-T Recommendation Q.733.4 (1993), Stage 3 description for call completion supplementary services using Signalling System No. 7: Terminal portability (TP). ITU-T Recommendation Q.733.5 (1999), Stage 3 description for call completion supplementary services using Signalling System No. 7: Completion of calls on no reply. ITU-T Recommendation Q.734.1 (1993), Stage 3 description for multiparty supplementary servic
