1、 ETSI TS 101 909-16 V1.1.1 (2004-12)Technical Specification Digital Broadband Cable Access to thePublic Telecommunications Network;IP Multimedia Time Critical Services;Part 16: Signalling for Call Management ServerITU-T Recommendation J.178 (2003): Pre-Published Version, modifiedETSI ETSI TS 101 909
2、-16 V1.1.1 (2004-12) 2 Reference DTS/AT-020020-16 Keywords endorsement, IPcable, management ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfectu
3、re de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versi
4、ons, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to re
5、vision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support
6、.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2004. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks
7、 of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 101 909-16
8、 V1.1.1 (2004-12) 3 Contents Intellectual Property Rights4 Foreword.4 Endorsement notice 4 History 16 ETSI ETSI TS 101 909-16 V1.1.1 (2004-12) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to
9、these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Lat
10、est updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the update
11、s on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Access and Terminals (AT). The present document is part 16 of a multi-part deliverable covering Digital Broadband
12、 Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services. Full details of the entire series can be found in part 1 39. The present document is part 16 of the series of ETSI deliverables and specifies the Call Management Server Signalling specification (CMSS). CMSS
13、 is a protocol, based upon a profile of the RFC 3261 8 that is used to communicate between entities within the IPCablecom network implementing SIP User Agent or proxy functionality (e.g. Call Management Servers (CMS), Media Gateway Controllers (MGC), announcement servers, etc.). Endorsement notice T
14、he elements of ITU-T Recommendation J.178, pre-published version apply, with the following modifications: ETSI ETSI TS 101 909-16 V1.1.1 (2004-12) 5 Summary The ITU-T Recommendation J.178 summary does not apply and is replaced by the following text: The present document defines a profile of the IETF
15、 SIP protocol for use within IPCablecom networks. The protocol defined as a result of this profile specification is known as Call Management Server (CMS) to Call Management Server (CMS) signaling protocol (CMSS). The protocol is used within secure domains. Introduction ITU-T Recommendation J.178, se
16、ction 1.1 “Scope“, does not apply and is replaced by the following text: Section 1.1 Scope: The present document defines a profile of the RFC 3261 8 for use within secure domains. This SIP profile (known as CMSS - “Call Management Server to Call Management Server Signalling Specification“) contains
17、extensions to the SIP protocol and usage rules to support services. 2 References The references provided in this list of references supercedes those provided in ITU-T Recommendation J.178. In line with the policy implemented in ITU-T Recommendation J.178 regarding references the following text from
18、ITU-T Recommendation J.178 explains the context under which these references are given: “The following ITU-T Recommendations and other references contain provisions, which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicate
19、d 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 below. A list of the currently valid ITU-T Recom
20、mendations 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.“ NOTE: When reading ITU-T Recommendation J.178 as part of the present document any reference number read from ITU-T Recommendation J.
21、178 shall refer to a reference in this list of references as opposed to the table of references supplied in ITU-T Recommendation J.178. 1 ETSI TS 101 909-2: “Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 2: Architectural framework
22、 for the delivery of time critical services over cable Television networks using cable modems“ (ITU-T Recommendation J.160 (02/02). 2 ETSI TS 101 909-11: “Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 11: Security“ (ITU-T Recommen
23、dation J.170 (02/02). 3 ETSI TS 101 909-10: “Access and Terminals (AT); Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 10: Event Message Requirements for the Provision of Real Time Services over Cable Television Networks using Cabl
24、e Modems“ (ITU-T Recommendation J.164 (03/01). 4 ETSI TS 101 909-5: “Access and Terminals (AT); Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 5: Dynamic Quality of Service for the Provision of Real Time Services over Cable Televis
25、ion Networks using Cable Modems“ (ITU-T Recommendation J.163 (03/01). 5 ETSI TS 101 909-4: “Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 4: Network Call Signalling Protocol“ (ITU-T Recommendation J.162 (03/01). 6 ETSI TS 101 909-
26、13 (Sub-part 1: H.248 option and Sub-part 2: MGCP option): “Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 13: Trunking Gateway Control Protocol“ (ITU-T Recommendation J.171 (02/02). ETSI ETSI TS 101 909-16 V1.1.1 (2004-12) 6 7 ITU
27、-T Recommendation J.174 (2002): “IPCablecom Interdomain Quality of Service“. 8 IETF RFC 3261 (2002): “SIP: Session Initiation Protocol“. 9 ITU-T Recommendation E.123 (2001): “Notation for national and international telephone numbers, e-mail addresses and Web addresses“. 10 ITU-T Recommendation E.164
28、 (1997): “The international public telecommunication numbering plan“. 11 IETF RFC 2327 (1998): “SDP: Session Description Protocol“. 12 IETF RFC 3551 (2003): “RTP Profile for Audio and Video Conferences with Minimal Control“. 13 IETF RFC 768 (1980): “User Datagram Protocol“. 14 IETF RFC 3312 (2002):
29、“Integration of Resource Management and Session Initiation Protocol (SIP)“. 15 IETF RFC 3262 (2002): “Reliability of Provisional Responses in Session Initiation Protocol (SIP)“. 16 IETF RFC 3323 (2002): “A Privacy Mechanism for the Session Initiation Protocol (SIP)“. 17 IETF RFC 3325 (2002): “Privat
30、e Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks“. 18 IETF RFC 3265 (2002): “Session Initiation Protocol (SIP) - Specific Event Notification“. 19 IETF RFC 3311 (2002): “The Session Initiation Protocol (SIP) UPDATE Method“. 20 IETF RFC 3263 (2002): “
31、Session Initiation Protocol (SIP): Locating SIP Servers“. 21 IETF RFC 2234 (1997): “Augmented BNF for Syntax Specifications: ABNF“. 22 IETF RFC 2397 (1998): “The data URL Scheme“. 23 IETF RFC 2396 (1998): “Uniform Resource Identifiers (URI): Generic Syntax“. 24 Void. 25 IETF RFC 3420 (2002): “Intern
32、et Media Type message/sipfrag“. 26 IETF RFC 3515 (2003): “The Session Initiation Protocol (SIP) Refer Method“. 27 IETF RFC 3603 (2003): “Private Session Initiation Protocol (SIP) Proxy-to-Proxy Extensions for Supporting the PacketCable Distributed Call Signaling Architecture“. 3 Terms and Definition
33、s The elements of ITU-T Recommendation J.178 section 3 apply with the following modifications: CNAM Calling Name gateway: devices bridging between secure domainsthe IPCablecom IP Voice Communication world and the PSTN. Examples are the Media Gateway which provides the bearer circuit interfaces to th
34、e PSTN and transcodes the media stream, and the Signalling Gateway which sends and receives circuit switched network signalling tot he edge of the IPCablecom network.sends and receives circuit switched network signalling tot he edge of the IPCablecom network. LNP Local Number Portability Off-Net Cal
35、l: A communication connecting a IPCablecom subscriber out to a user on the PSTN the PSTN On-Net Call: A communication placed by one customer to another customer entirely on the IPCablecom Network ETSI ETSI TS 101 909-16 V1.1.1 (2004-12) 7 secure domain: within a secure domain CMSS signalling is pass
36、ed transparently between trusted CMSS capable entities NOTE: Between secure domains gateways are used to filter or block information per functional, regulatory or legal requirements. 4 Abbreviations and Acronyms The elements of ITU-T Recommendation J.178 section 4 apply with the following modificati
37、ons: This Recommendation defines the following abbreviations and acronyms. BLV Busy Line Verification CLASS Custom Local Area Signalling Services EI Emergency Interrupt MF Multi-Frequency MG Media Gateway MGC Media Gateway Controller Sections 5 to 5.2 Sections 5 to 5.2 are not endorsed and do not ap
38、ply to the present document. 5.3 CMSS Trust Model ITU-T Recommendation J.178 section 5.3 “CMSS Trust Model“ does not apply and is replaced by the following text: Within a secure domain CMSS signalling is passed transparently between trusted CMSS capable entities. Between secure domains gateways are
39、used to filter or block information per functional, regulatory or legal requirements. Sections 5.4 to 5.7 Sections 5.4 to 5.7 are not endorsed and do not apply to the present document. 6 SIP Profile All elements of ITU-T Recommendation J.178 section 6 (and associated sub-sections) apply with the exc
40、eption of section 6.20.42 which is replaced as follows: 6.20.42 Via The Via header MUST be supported as specified in RFC 3261 8 section 20.42, except as noted below: A border proxy (EBP) which is passing a request outside of the trusted domain of the service provider MAY encrypt all “Via“ headers ex
41、cept the topmost header (i.e., the “Via“ header of the terminating proxy) to a non-recognizable string. The proxy MAY include the encrypted string in the Via header, or it may cache the encrypted “Via“ headers and include a local token string in the Via header. 7 SIP ExtensionsThe elements of ITU-T
42、Recommendation J.178 section 7 apply with the following modifications: SIP 8 has a flexible mechanism for adding extensions and new fields to the protocol for support of additional capabilities. This section defines a set of SIP extensions that enables IPCablecom CMSS-compliant systems to provide a
43、robust multimedia service platform supporting basic telephony, CLASS, and custom calling features, while at the same time allowing the supported services to evolve to a multimedia environment. Many of the extensions have been documented in RFCs, to which this document provides cross-references. Seve
44、ral of these extensions have their base in the Distributed Call Signalling (DCS) framework, as described in 30. ETSI ETSI TS 101 909-16 V1.1.1 (2004-12) 8 This section describes procedures applicable to both NCS and SIP based endpoints; however, it should be noted that SIP based MTAs are out of scop
45、e of IPCablecom 1.2 and are described and listed in this section for reference purposes only. The term SIP User Agent (UA) in this section refers to an originator/terminator of SIP requests. The combination of a UA with its SIP Proxy is in many ways equivalent to a CMS; likewise a CMS may be decompo
46、sed into a UA and a SIP Proxy (with a hidden and untestable interface between them) as shown in figure 3. This section follows the naming convention of RFC 3261SIP 8, of User Agents, Clients, Servers, and Proxies. User Agent Clients initiate requests and in particular initiate sessions (i.e., they a
47、re call originators), and User Agent Servers respond to requests and in particular accept session requests (i.e., they are call terminators). A User Agent performs either role as required within the context of the call. The description of each extension in this section gives the specific procedures
48、for CMSes and Proxies. This specification extends SIP in several ways, which are summarized here. All these extensions MUST be supported: CMSS supports a resource reservation scheme in which network resources are reserved prior to alerting the user. This is done through specification of precondition
49、s that must be met prior to continuing the session establishment. Confirmation that the preconditions are met is indicated by an additional end-to-end message exchange (UPDATE/200-OK), which is nested within the normal INVITE/200-OK/ACK message exchange. This extension allows network resources to be reserved prior to alerting the user and also allows network resources to be committed after the user has accepted the invitation, i.e., answered the call. This extension is described further in RFC 3312 14
