ETSI TS 183 004 V1.5.0 (2008-01) Technical Specification Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); PSTN/ISDN simulation services: Communication Diversion (CDIV); Protocol specification 2 ETSI TS 183 004 V1.5.0 (2008-01) Reference RTS/TISPAN-03115-NGN-R1 Keywords CF, supplementary service 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 à but non lucratif enregistrée à la Sous-Préfecture 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 versions, the reference version is the Portable Document Format (PDF). 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ETSI 3 ETSI TS 183 004 V1.5.0 (2008-01) Contents Intellectual Property Rights................................................................................................................................5 Foreword.............................................................................................................................................................5 1 Scope........................................................................................................................................................6 2 References................................................................................................................................................6 2.1 Normative references.........................................................................................................................................6 2.2 Informative references........................................................................................................................................7 3 Definitions and abbreviations...................................................................................................................7 3.1 Definitions..........................................................................................................................................................7 3.2 Abbreviations.....................................................................................................................................................8 4 Communication Diversion (CDIV)..........................................................................................................8 4.1 Introduction........................................................................................................................................................8 4.2 Description.........................................................................................................................................................9 4.2.1 General description.......................................................................................................................................9 4.3 Operational requirements.................................................................................................................................11 4.3.1 Provision/withdrawal..................................................................................................................................11 4.3.2 Requirements on the originating network side............................................................................................12 4.3.3 Requirements in the network......................................................................................................................12 4.4 Coding requirements........................................................................................................................................12 4.4.1 SIP-Messages..............................................................................................................................................13 4.4.2 Parameters...................................................................................................................................................13 4.5 Signalling requirements....................................................................................................................................13 4.5.0 General........................................................................................................................................................13 4.5.1 Activation/deactivation...............................................................................................................................13 4.5.1A Registration/erasure....................................................................................................................................13 4.5.1B Interrogation...............................................................................................................................................14 4.5.2 Invocation and operation............................................................................................................................14 4.5.2.1 Actions at the originating UA...............................................................................................................14 4.5.2.2 Actions at the originating P-CSCF........................................................................................................14 4.5.2.3 Actions at the originating S-CSCF........................................................................................................14 4.5.2.4 Actions at the diverting S-CSCF...........................................................................................................14 4.5.2.5 Actions at the diverted to S-CSCF........................................................................................................14 4.5.2.6 Actions at the AS of the diverting User................................................................................................14 4.5.2.6.1 Checking of the diversion limits......................................................................................................14 4.5.2.6.2 Setting of the diversion parameters by the AS................................................................................15 4.5.2.6.3 Diversion procedures at the diverting AS........................................................................................17 4.5.2.6.4 Notification procedures of the originating user (Subscription Option)...........................................19 4.5.2.6.5 Indication of communication diversion to the diverting user (Subscription Option)......................20 4.5.2.6.6 Not reachable indication..................................................................................................................20 4.5.2.7 Actions at the AS of the diverted to User..............................................................................................20 4.5.2.8 Void.......................................................................................................................................................20 4.5.2.9 Actions at the incoming I-CSCF...........................................................................................................20 4.5.2.10 Actions at the outgoing IBCF................................................................................................................20 4.5.2.11 Actions at the incoming IBCF...............................................................................................................20 4.5.2.12 Actions at the BGCF.............................................................................................................................21 4.5.2.13 Actions at the MGCF............................................................................................................................21 4.5.2.14 Actions at the destination P-CSCF........................................................................................................21 4.5.2.15 Actions at the diverted to UA................................................................................................................21 4.5.2.16 Actions at the diverting UA..................................................................................................................21 4.6 Interaction with other services..........................................................................................................................21 4.6.1 Communication Hold (HOLD)...................................................................................................................21 4.6.2 Terminating Identification Presentation (TIP)............................................................................................21 4.6.3 Terminating Identification Restriction (TIR)..............................................................................................21 4.6.4 Originating Identification Presentation (OIP).............................................................................................21 4.6.5 Originating Identification Restriction (OIR)...............................................................................................21 ETSI 4 ETSI TS 183 004 V1.5.0 (2008-01) 4.6.6 Conference calling (CONF)........................................................................................................................22 4.6.7 Communication Diversion Services (CDIV)..............................................................................................22 4.6.8 Malicious Communication Identification (MCID).....................................................................................22 4.6.9 Anonymous Communication Rejection and Communication Barring (ACR/CB).....................................22 4.6.10 Explicit Communication Transfer (ECT)...................................................................................................22 4.6.10.1 Actions at the diverting AS...................................................................................................................22 4.6.10.1.1 Determine whether ECT is applied to the diverted communication................................................22 4.6.10.1.2 Handling of transfer requests...........................................................................................................22 4.6.10.1.3 Actions when CDIV is invoked again by the transferred communication.......................................22 4.7 Interactions with other networks......................................................................................................................23 4.7.1 Interaction with PSTN/ISDN......................................................................................................................23 4.7.1.1 Interworking at the O-MGCF................................................................................................................23 4.7.1.1.1 Void.................................................................................................................................................26 4.7.1.1.2 Call forwarding within the ISUP Network appeared.......................................................................26 4.7.1.2 Interworking at the I-MGCF.................................................................................................................28 4.7.2 Interaction with PSTN/ISDN Emulation....................................................................................................34 4.7.3 Interaction with external IP networks.........................................................................................................34 4.8 Parameter values (timers).................................................................................................................................34 4.8.1 No reply timer.............................................................................................................................................34 4.9 Service Configuration.......................................................................................................................................35 4.9.1 Structure of the XML Document................................................................................................................35 4.9.1.1 Communication Diversion Element......................................................................................................35 4.9.1.2 Communication Diversion Rules..........................................................................................................36 4.9.1.3 Communication Diversion Rule Conditions.........................................................................................36 4.9.1.4 Communication Diversion Rule Actions..............................................................................................37 4.9.2 XML Schema..............................................................................................................................................37 Annex A (informative): Signalling Flows.............................................................................................39 A.1 Normal cases..........................................................................................................................................39 A.1.1 Communication Forwarding unconditional......................................................................................................39 A.1.2 Communication Deflection..............................................................................................................................41 A.1.3 Communication Forwarding on non Reply......................................................................................................43 A.1.4 Communication Forwarding on Busy...............................................................................................................46 A.1.5 Communication Forwarding Not Logged-in (CFNL)......................................................................................48 A.2 Interworking...........................................................................................................................................49 A.2.1 Communication Forwarding unconditional......................................................................................................49 A.2.2 Communication Deflection..............................................................................................................................50 Annex B (informative): Example of filter criteria...............................................................................51 Annex C (informative): Coding considerations...................................................................................52 Annex D (informative): Change history...............................................................................................53 History..............................................................................................................................................................54 ETSI 5 ETSI TS 183 004 V1.5.0 (2008-01) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to 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. Latest 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 updates 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 Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). ETSI 6 ETSI TS 183 004 V1.5.0 (2008-01) 1 Scope The present document specifies the, stage three, Protocol Description of the Communications Diversion (CDIV) services, based on stage one and two of the ISDN Communication diversion supplementary services. Within the Next Generation Network (NGN) the stage 3 description is specified using the IP Multimedia Communication Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP). 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future changes of the referenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably, the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the method of access to the referenced document and the full network address, with the same punctuation and use of upper case and lower case letters. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. [1] ETSI TS 181 002: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Multimedia Telephony with PSTN/ISDN simulation services". [2] ETSI ES 283 003: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Stage 3 [3GPP TS 24.229 (Release 7), modified]". [3] IETF RFC 4244: "An Extension to the Session Initiation Protocol (SIP) for Request History Information". [4] ETSI TS 183 023: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); PSTN/ISDN simulation services; Extensible Markup Language (XML) Configuration Access Protocol (XCAP) over the Ut interface for Manipulating NGN PSTN/ISDN Simulation Services". [5] IETF RFC 4566: "SDP: Session Description Protocol". [6] IETF RFC 3261: "SIP: Session Initiation Protocol". ETSI 7 ETSI TS 183 004 V1.5.0 (2008-01) [7] IETF RFC 3966: "The tel URI for Telephone Numbers". [8] IETF RFC 3325: "Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks". [9] ETSI TS 183 011: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); PSTN/ISDN simulation services: Anonymous Communication Rejection (ACR) and Communication Barring (CB); Protocol specification". [10] ETSI EN 300 356-15 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 15: Diversion supplementary service [ITU-T Recommendation Q.732, clauses 2 to 5 (1999) modified]". [11] ETSI TS 183 028: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Common Basic Communication procedures; Protocol specification". [12] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Functional Architecture Release 1". [13] ETSI ES 283 027: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Endorsement of the SIP-ISUP Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks [3GPP TS 29.163 (Release 7), modified]". [14] IETF RFC 4458: "Session Initiation Protocol (SIP) URIs for Applications such as Voicemail and Interactive Voice Response (IVR)". [15] ETSI TS 183 029: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); PSTN/ISDN simulation services: Explicit Communication Transfer (ECT); Protocol specification". [16] IETF RFC 3515: "The Session Initiation Protocol (SIP) Refer Method". [17] IETF RFC 4745: "Common Policy: A Document Format for Expressing Privacy Preferences". 2.2 Informative references [18] OMA-TS-XDM-Core-V1-0: "XML Document Management (XDM) Specification", Version 1.0 OMA-TS-XDM-Core-V1-0-1-20061128-A.pdf. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TS 181 002 [1] and the following apply: escaped character: See RFC 3261 [6]. CDIV Session Identifier URI: URI created and inserted by a diverting AS that is routed through the same AS NOTE: This is used to solve the service interaction of CDIV and ECT. transferee: party being transferred to the transfer target transferor: party initiating the transfer transfer target: party that the existing communication is transferred to NOTE: After transfer the transferee and the transfer target are in communication with each other. ETSI 8 ETSI TS 183 004 V1.5.0 (2008-01) 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK ACKnowledgement ACM Address Complete Message ACR Anonymous Communication Rejection ANM ANswer Message AS Application Server CB Communication Barring CD Communication Deflection CDIV Communication DIVersion CFB Communication Forwarding Busy CFNL Communication Forwarding on Not Logged-in CFNR Communication Forwarding No Reply CFNRc Communication Forwarding on subscriber Not Reachable CFU Communication Forwarding Unconditional CONF CONFerence CPC Calling Party Category CPG Call progress message ECT Explicit Communication Transfer HOLD communication HOLD IFC Initial Filter Criteria IMS IP Multimedia Subsystem IP Internet Protocol ISDN Integrated Service Data Network MCID Malicious Communication IDentification NDC National Destination Code NGN Next Generation Network NOA Nature Of Address OCB Outgoing Communication Barring OIP Originating Identification Presentation OIR Originating Identification Restriction PSTN Public Switched Telephone Network P-CSCF Proxy-Call Session Control Function RTP Real-Time Transport Protocol S-CSCF Server-Call Session Control Function SDP Session Description Protocol SIP Session Initiation Protocol SN Subscriber Number TIP Terminating Identification Presentation TIR Terminating Identification Restriction UA User Agent UE User Equipment URI Universal Resource Identifier XML eXtensible Markup Language 4 Communication Diversion (CDIV) 4.1 Introduction The Communications Diversion (CDIV) services enables diverting user, to divert the communications addressed to diverting user to an other destination. ETSI 9 ETSI TS 183 004 V1.5.0 (2008-01) 4.2 Description 4.2.1 General description The service description of the following Communication Services CFU, CFB, CFNR, CFNRc and CD are based on the PSTN/ISDN Supplementary Services. Generally the following requirements should be fulfilled: • It shall be possible for the user or the network to identify an alternative destination for an IP multimedia session or individual media of an IP multimedia session. • It shall be possible for redirection to be initiated at various stages of an IP Multimedia session. For example: - Prior to the set up of an IP Multimedia session. - During the initial request for an IP Multimedia session (CFU). - During the establishment of an IP Multimedia session (CD). • Redirection can be applied for all Multimedia sessions unconditionally or it can be caused by any of a set list of events or conditions. Typical causes could be: - Identity of the originating user. - Presence of the originating or destination party. - If the destination party is already in a session (CFB). - If the destination party is unreachable or unavailable in some other way (CFNL, CFNR, CFNRc). - If the destination party does not respond (CFNR). - After a specified alerting interval (CFNR). - User's preference on routing for specific IP Multimedia session based on the capabilities of multiple UEs sharing the same IMS service subscription. - The sending party, receiving party or the network on their behalf, may initiate redirection to alternative destinations. The following services describe applications based on a subset of the above-mentioned requirements to provide user different possibilities to divert a communication. It should be possible that a user has the option to restrict receiving communications that are forwarded. Communication Forwarding Unconditional (CFU) The CFU service enables a served user to have the network redirect to another user communications which are addressed to the served user's address. The CFU service may operate on all communication, or just those associated with specified services. The served user's ability to originate communications is unaffected by the CFU supplementary service. After the CFU service has been activated, communications are forwarded independent of the status of the served user. As a service provider option, a subscription option can be provided to enable the served user to receive an indication that the CFU service has been activated. This indication shall be provided when the served user originates a communication if the CFU service has been activated for the served user's address and for the service requested for the communication. The maximum number of diversions permitted for each communication is a service provider option. The service provider shall define the upper limit of diversions. When counting the number of diversions, all types of diversion are included. ETSI 10 ETSI TS 183 004 V1.5.0 (2008-01) Communication Forwarding on Busy user (CFB) The CFB service enables a served user to have the network redirect to another user communications which are addressed to the served user's address and meet busy. The CFB service may operate on all communications, or just those associated with specified services. The served user's ability to originate communications is unaffected by the CFB supplementary service. As a service provider option, a subscription option can be provided to enable the served user to receive an indication that the CFB service has been activated. This indication shall be provided when the served user originates a communication if the CFB service has been activated for the served user's address and for the service requested for the communication. The maximum number of diversions permitted for each communication is a service provider option. The service provider shall define the upper limit of diversions. When counting the number of diversions, all types of diversion are included. For more information on the procedures for determination of the busy condition see TS 183 028 [11]. Communication Forwarding on No Reply (CFNR) The CFNR service enables a served user to have the network redirect to another user communications which are addressed to the served user's address, and for which the connection is not established within a defined period of time. The CFNR service may operate on all communications, or just those associated with specified services. The served user's ability to originate communications is unaffected by the CFNR supplementary service. The CFNR service can only be invoked by the network after the communication has been offered to the served user and an indication that the called user is being informed of the communication has been received. As a service provider option, a subscription option can be provided to enable the served user to receive an indication that the CFNR service has been activated. This indication shall be provided when the served user originates a communication if the CFNR service has been activated for the served user's address and for the service requested for the communication. The maximum number of diversions permitted for each communication is a service provider option. The service provider shall define the upper limit of diversions. When counting the number of diversions, all types of diversion are included. Communication Forwarding on Subscriber Not Reachable (CFNRc) The CFNRc service enables an user to have the network redirect all incoming communications, when the user is not reachable (e.g. there is no IP connectivity to the user's terminal), to another user. The CFNRc service may operate on all communications, or just those associated with specified services. The user's ability to originate communications is unaffected by the CFNRc simulation service. As a service provider option, a subscription option can be provided to enable the user to receive an indication that the CFNRc service has been activated. This indication may be provided when the user originates a communication if the CFNRc service has been activated for the user and for the service requested for the communication. The maximum number of diversions permitted for each communication is a service provider option. The service provider shall define the upper limit of diversions. When counting the number of diversions, all types of diversion are included. Communication Deflection (CD) The CD service enables the served user to respond to an incoming communication by requesting redirection of that communication to another user. The CD service can only be invoked before the connection is established by the served user, i.e. in response to the offered communication (before ringing), i.e. CD Immediate, or during the period that the served user is being informed of the communication (during ringing). The served user's ability to originate communications is unaffected by the CD supplementary service. The maximum number of diversions permitted for each communication is a network provider option. The network provider shall define the upper limit of diversions. When counting the number of diversions, all types of diversion are included. ETSI