1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Q.1912.5 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2018) SERIES Q: SWITCHING AND SIGNALLING, AND ASSOCIATED MEASUREMENTS AND TESTS Specifications of signalling related to Bearer Independent Call Control (BICC) Int
2、erworking between session initiation protocol (SIP) and bearer independent call control protocol or ISDN user part Recommendation ITU-T Q.1912.5 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING, AND ASSOCIATED MEASUREMENTS AND TESTS SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERN
3、ATIONAL 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 SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLIN
4、G 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 REQUIREM
5、ENTS 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 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR THE NGN Q.3000Q.3709 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR SDN Q.3710Q.3899 TESTING SPECI
6、FICATIONS Q.3900Q.4099 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.1912.5 (01/2018) i Recommendation ITU-T Q.1912.5 Interworking between session initiation protocol (SIP) and bearer independent call control protocol or ISDN user part Summary Recommendation IT
7、U-T Q.1912.5 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 supported by BICC or ISUP and SIP-based network domains. It includes assured early dialogue, end-to-end sup
8、port for ISDN user equipment, support for number portability and support for the interworking of supplementary services. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T Q.1912.5 2004-03-12 11 11.1002/1000/6999 2.0 ITU-T Q.1912.5 2018-01-13 11 11.1002/1000/13481 Keywords BICC
9、, IMS, interconnection, interworking, ISUP, legacy networks, SIP. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Q.1912.5 (0
10、1/2018) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible
11、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, establishes the topics for study by the ITU-T st
12、udy 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 necessary standards are prepared on a collaborative basi
13、s with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory
14、provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these 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
15、 of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU 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 p
16、osition 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, pr
17、otected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2018 All rights reserved. No par
18、t of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.1912.5 (01/2018) iii Table of Contents Page 1 Scope . 1 2 References . 2 3 Definitions 4 4 Abbreviations and acronyms 5 5 Conventions and Methodology . 7 5.1 Conventions for re
19、presentation of BICC/ISUP PDU . 7 5.2 Conventions for representation of SIP/SDP information . 8 5.3 General principles . 8 5.4 ISUP encapsulation detailed procedures . 10 5.5 sip: and sips: URIs 13 6 Incoming call interworking from SIP to BICC/ISUP at I-IWU . 13 6.1 Sending of Initial Address Messag
20、e (IAM) 14 6.2 Receipt of subsequent INVITE 36 6.3 Sending of COT 36 6.4 Receipt of Connect message (CON) . 36 6.5 Receipt of ACM . 39 6.6 Receipt of CPG . 43 6.7 Receipt of Answer Message (ANM) 48 6.8 Through connection of the bearer path . 51 6.9 Receipt of Suspend message (SUS) network initiated
21、. 51 6.10 Receipt of Resume message (RES) network initiated 51 6.11 Release procedures at the I-IWU 52 7 Outgoing call interworking from BICC/ISUP to SIP at O-IWU 58 7.1 Sending of the first INVITE . 59 7.2 Receipt of SAM after INVITE has been sent . 85 7.3 Receipt of 18X response . 85 7.4 Expiry of
22、 timers and sending of early ACM 92 7.5 Receipt of 200 OK INVITE . 92 7.6 Through connection of BICC/ISUP bearer path 95 7.7 Release procedures at the O-IWU 96 7.8 Timers at O-IWU 101 Annex A BICC specific interworking for basic call . 103 A.1 Introduction 103 A.2 Interworking BICC to/from SIP with
23、common media bearer technology and BICC supports “Bearer Control Tunnelling“ . 103 A.3 Bearer Control Interworking Function . 106 Annex B Interworking for ISDN supplementary services 109 B.1 Interworking of CLIP/CLIR supplementary service to SIP networks 109 iv Rec. ITU-T Q.1912.5 (01/2018) Page B.2
24、 Interworking of COLP/COLR supplementary service to SIP networks 109 B.3 Interworking of Direct-Dialling-In (DDI) supplementary service to SIP networks . 116 B.4 Interworking of Malicious Call Identification (MCID) supplementary service to SIP networks 116 B.5 Interworking of Sub-addressing (SUB) su
25、pplementary service to SIP networks . 119 B.6 Interworking of Call Forwarding Busy (CFB)/Call Forwarding No Reply (CFNR)/Call Forwarding Unconditional (CFU)/ Call Deflection (CD) supplementary services to SIP networks 122 B.7 Interworking of Explicit Call Transfer (ECT) supplementary service to SIP
26、networks . 140 B.8 Interworking of Call Waiting (CW) supplementary service to SIP networks . 140 B.9 Interworking of Call Hold (HOLD) supplementary service to SIP networks . 141 B.10 Interworking of Completion of Calls to Busy Subscriber (CCBS) and Completion of Calls on No Reply (CCNR) supplementar
27、y service to SIP networks . 144 B.11 Interworking of Terminal Portability (TP) supplementary service to SIP networks . 149 B.12 Interworking of Conference Calling (CONF) supplementary service to SIP networks . 149 B.13 Interworking of Three-Party Service (3PTY) supplementary service to SIP networks
28、. 151 B.14 Interworking of Closed User Group (CUG) supplementary service to SIP networks . 152 B.15 Interworking of Multi-Level Precedence and Preemption (MLPP) supplementary service to SIP networks 155 B.16 Interworking of Global Virtual Network Service (GVNS) supplementary service to SIP networks
29、155 B.17 Interworking of International Telecommunication Charge Card (ITCC) supplementary service to SIP networks 155 B.18 Interworking of Reverse Charging (REV) supplementary service to SIP networks . 155 B.19 Interworking of User-to-User Signalling (UUS) supplementary service to SIP networks . 155
30、 B.20 Supplementary timers (For profiles A and B) 157 Annex C 158 C.1 SIP/SIP-I references (normative) . 158 C.2 The P-Asserted-Identity SIP header extension (normative) . 160 Annex D IWU MGW Interaction . 161 D.1 Overview 161 D.2 Mn signalling interactions 161 Rec. ITU-T Q.1912.5 (01/2018) v Page A
31、nnex E Codec negotiation between a BICC CS network and the IM CN subsystem 163 E.1 Description of codec negotiation between a BICC circuit switched (CS) network and the IP multimedia (IM) core network (CN) subsystem . 163 Annex F Multimedia interworking between the IP multimedia core network (CN) su
32、bsystem (IMS) and circuit switched (CS) networks . 164 F.1 Description of multimedia interworking between the IP multimedia core network (CN) subsystem (IMS) and circuit switched (CS) networks 164 Annex G ITU-T T.38 interworking between the IP multimedia core network (CN) subsystem (IMS) and circuit
33、 switched (CS) networks . 165 G.1 Description of the ITU-T T.38 interworking between the IP multimedia core network (CN) subsystem (IMS) and circuit switched (CS) networks 165 Annex H PSTN XML Schema 166 H.1 Scope 166 H.2 MIME type . 166 H.3 XML Schema definition . 166 H.4 IANA registration template
34、 166 Appendix I Interworking scenarios between SIP and BICC . 168 I.1 Scope 168 I.2 Definitions 168 I.3 Abbreviations . 168 I.4 Methodology . 169 I.5 Interworking of SIP accesses to BICC . 169 Appendix II Interworking scenarios between SIP and ISUP 173 II.1 Scope 173 II.2 Definitions 173 II.3 Abbrev
35、iations . 173 II.4 Methodology . 174 II.5 Interworking of SIP Access to ISUP 174 Appendix III Interworking scenarios between Profile C (SIP-I) and ISUP 178 III.1 General . 178 III.2 Interworking of ISUP with SIP using Profile C (SIP-I) . 179 Appendix IV Echo canceller scenarios between SIP and ISUP
36、192 IV.1 Scope 192 IV.2 Definitions 192 IV.3 Example scenarios for call interworking between SIP and ISUP 192 Bibliography. 196 Rec. ITU-T Q.1912.5 (01/2018) 1 Recommendation ITU-T Q.1912.5 Interworking between session initiation protocol (SIP) and bearer independent call control protocol or ISDN us
37、er part 1 Scope This Recommendation defines the signalling interworking between the bearer independent call control (BICC) or ISDN user part (ISUP) protocols and session initiation protocol (SIP) with its associated session description protocol (SDP) at an interworking unit (IWU). The ISUP is define
38、d in accordance with ITU-T Q.761 to ITU-T Q.764 and BICC is defined in accordance with ITU-T Q.1902.1 to ITU-T Q.1902.4. The SIP and SDP are defined by the Internet Engineering Task Force (IETF). The capabilities of SIP and SDP that are needed to interwork with BICC or ISUP are defined in Annex C. A
39、n IWU may 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 forwarded and/or delivered via a trusted adjacent SIP node (ASN) within a SIP network domain. The ASN is viewed as a trusted
40、 network entity rather than an 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 assumed that the remote SIP user agent is able to process ISUP. Support for SIP interworking at a user network inte
41、rface (UNI) is out of the 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 supported through the use of signalling interworking are limited to the services that are supported by BICC
42、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 also handle (through default origination or graceful termination) services or capabilities that do not interwork ac
43、ross 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 interworking between two signalling systems in this Recommendation are for further study. Figure 1 Scope of interwo
44、rking between SIP and ISUP 2 Rec. ITU-T Q.1912.5 (01/2018) Figure 2 shows the scope of interworking between SIP and BICC. NOTE 1 The content consists of the SIP headers and message body. NOTE 2 Interworking with ATM bearer control in not specified in this Recommendation. Figure 2 Scope of interworki
45、ng between SIP and BICC b-ITU-T Q.Sup.45 specifies the set of common capabilities supported by the interworking between SIP and BICC/ISUP for three different profiles (A, B, and C) in the form of tables. Tables 1 and 2 of b-ITU-T Q.Sup.45 specify the interworking capabilities for Profile A, tables 3
46、 and 4 specify the interworking capabilities for Profile B, and tables 5 and 6 specify the 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 clause C.1.1.2. Administrations may
47、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 this text, cons
48、titute 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 edition of the R
49、ecommendations 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 RFC directly referenced by this Recommendation are listed in clause C.1. ITU-T E.164 Recommendation ITU-T E.164 (2010), The international public telecommunication numbering plan. ITU-T H.248.1 Re
