1、 ETSI TS 102 284 V1.1.1 (2003-11)Technical Specification Telecommunications and Internet ProtocolHarmonization Over Networks (TIPHON);TIPHON/UMTS Harmonization;Extensions and additions tothe Network Architecture and Reference PointsETSI ETSI TS 102 284 V1.1.1 (2003-11) 2 Reference DTS/TIPHON-02019 K
2、eywords architecture, configuration, IP, protocol, telephony, UMTS, VoIP 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-Prfecture de Grasse (06) N
3、 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
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5、 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, send your comment to: editoretsi.org Copyright Notification No part may be reproduced except as authorized by written per
6、mission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2003. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade
7、 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 102 284 V1.1.1 (2003-11) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 References
8、 5 3 Abbreviations .5 4 Comparison of architectural concepts 6 4.1 TIPHON architecture .6 4.2 UMTS architecture.6 5 Configuration of a Public Land Mobile Network (PLMN)6 5.1 Basic configuration.6 5.2 IP Multimedia (IM) Core Network (CN) Subsystem entities.8 5.2.1 Call Session Control Function (CSCF)
9、.8 5.2.2 Home Subscriber Server (HSS) 9 5.2.3 Media Gateway Control Function (MGCF)10 5.2.4 IP Multimedia Subsystem - Media Gateway (IMS-MGW) function 10 5.2.5 Multimedia Resource Function Controller (MRFC).11 5.2.6 Multimedia Resource Function Processor (MRFP) 11 5.2.7 Subscription Locator Function
10、 (SLF) .11 5.2.8 Breakout Gateway Control Function (BGCF) 11 5.2.9 Application Server (AS) .11 History 13 ETSI ETSI TS 102 284 V1.1.1 (2003-11) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to
11、 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. La
12、test 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 updat
13、es 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 Project Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON). ETSI ETSI TS 102 284 V1.1.1 (2003-11) 5 1 Sco
14、pe The present document provides an analysis of the TIPHON Release 4 Network Architecture and Reference Points 1 in comparing to the UMTS IP Multimedia Subsystem (IMS) architecture with a view to identifying where, if necessary, the TIPHON architecture needs to be extended to ensure harmonization be
15、tween the two. Clause 4 provides a comparison of the TIPHON and UMTS architectural concepts. Clause 5 identifies UMTS functional groupings and identifies where the equivalent TIPHON functionality is found in the TIPHON architecture. 2 References The following documents contain provisions which, thro
16、ugh reference in this text, constitute provisions of the present document. 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. For a non-specific reference, the latest
17、 version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ETSI TS 101 314: “Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 4; Abstract Architecture and Refer
18、ence Points Definition; Network Architecture and Reference Points“. 2 ETSI TS 123 002: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Network architecture (3GPP TS 23.002)“. 3 ETSI TS 123 226: “Universal Mobile Telecommunications System (UM
19、TS); Global Text Telephony (GTT); Stage 2 (3GPP TS 23.228)“. 4 ETSI TS 123 205: “Universal Mobile Telecommunications System (UMTS); Bearer-independent circuit-switched core network; Stage 2 (3GPP TS 23.205)“. 5 ITU-T Recommendation H.248: “Gateway control protocol“. 6 ETSI TS 122 127: “Universal Mob
20、ile Telecommunications System (UMTS); Service Requirement for the Open Services Access (OSA); Stage 1 (3GPP TS 22.127)“. 7 ETSI TS 123 228: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.22
21、8)“. 3 Abbreviations For the purposes of the present document, the following abbreviations apply: AS Application Server BGCF Breakout Gateway Control Function CN Core Network CSCF Call Session Control Function GPRS General Packet Radio Service HSS Home Subscriber Server I-CSCF Interrogating CSCF ETS
22、I ETSI TS 102 284 V1.1.1 (2003-11) 6 IMS IP Multimedia core network Subsystem IMSI International Mobile Subscriber Identity ISDN Integrated Services Digital Network MGCF Media Gateway Control Function MGW Media GateWay MRFC Multimedia Resource Function Controller MRFP Multimedia Resource Function Pr
23、ocessor MSISDN Mobile Station ISDN Number OSA Open Systems Access P-CSCF Proxy CSCF PLMN Public Land Mobile Network SCS OSA Service Capability Server S-CSCF Serving CSCF SLF Subscription Locator Function UMSC UMTS MSCUMTS Universal Mobile Telecommunications System VLR Visitor Location Register VoIP
24、Voice over IP 4 Comparison of architectural concepts 4.1 TIPHON architecture The TIPHON architecture is a generic architecture from which technology specific architectures can be derived. It describes the network architecture and shows reference configurations to support specific services and servic
25、e capabilities. 4.2 UMTS architecture The UMTS architecture is a technology specific architecture specified for an access network based on the air interface and a core network that provides access to services, such as telephony and messaging. The UMTS architecture is split into both circuit and pack
26、et switched domains. The circuit switched domain provides support for traditional ISDN-based telephony services (including supplementary services), whereas the packet switched domain provides support for access to data networks in general and the Internet in particular to enable the provision of new
27、 value added services including data and voice communications (including VoIP). 5 Configuration of a Public Land Mobile Network (PLMN) NOTE: The text in this clause describing the PLMN is extracted from TS 123 002 2 which remains the normative source. 5.1 Basic configuration The basic configuration
28、of a Public Land Mobile Network (PLMN) supporting GPRS and the interconnection to the PSTN/ISDN and PDN is presented in figure 1. This configuration presents signalling and user traffic interfaces which can be found in a PLMN. Specific implementations may be different: for example some functions may
29、 be collected in the same equipment and then some interfaces may become internal interfaces. ETSI ETSI TS 102 284 V1.1.1 (2003-11) 7 In the basic configuration presented in figure 1, all the functions are considered implemented in different equipments. Therefore, all the interfaces within PLMN are e
30、xternal. Interfaces A and Abis are defined in the TS 148 xxx-series. Interfaces Iu, Iur and Iub are defined in the TS 125 4xx-series. Interfaces B, C, D, E, F and G need the support of the Mobile Application Part of the signalling system No. 7 to exchange the data necessary to provide the mobile ser
31、vice. No protocols for the H-interface and for the I-interface are standardized. All the GPRS-specific interfaces (G- series) are defined in the TS 123 xxx-series and TS 124 xxx-series. Interfaces Mc, Nb, and Nc are defined in TS 123 205 4 and in the TS 129 xxx-series. From this configuration, all t
32、he possible PLMN organizations can be deduced. In the case when some functions are contained in the same equipment, the relevant interfaces become internal to that equipment. BSSBSCRNSRNCCNNode B Node BIuCS IuPSIurIubUSIMMEMSCuUuMSC serverSGSNGsGGSNGMSCserverGnHSS(HLR,AuC)GrGcCDEEIRFGfGiPSTNIuCSIuPS
33、VLRBGpVLRGBTSBTSUmRNCAbisSIMSIM-ME i/f orMSC serverBPSTNcellCS-MGWCS-MGWCS-MGWNbMcMcNbPSTNPSTNNcMcAGbGoNcLegend: Bold lines: interfaces supporting user traffic; Dashed lines: interfaces supporting signalling. NOTE 1: The figure shows direct interconnections between the entities. The actual links may
34、 be provided by an underlying network (e.g. SS7 or IP): this needs further studies. NOTE 2: When the MSC and the SGSN are integrated in a single physical entity, this entity is called UMTS MSC (UMSC). NOTE 3: A (G)MSC server and associated CS-MGW can be implemented as a single node: the (G)MSC. NOTE
35、 4: The Gn interface (between two SGSNs) is also part of the reference architecture, but is not shown for layout purposes only. Figure 1: Basic configuration of a PLMN supporting CS and PS services and interfaces ETSI ETSI TS 102 284 V1.1.1 (2003-11) 8 5.2 IP Multimedia (IM) Core Network (CN) Subsys
36、tem entities The architecture of the UMTS IP Multimedia Subsystem is shown in figure 1. P-CSCF M Subsystem CSCF MGCF HSS Cx IP Multimedia Networks IMS-MGW PSTN Mn Mb Mg Mm MRFP Mb Mr Mb Legacy mobile signalling Networks CSCF Mw Go PDF Mw GmBGCF MjMi BGCF Mk Mk C, D, Gc, Gr UE Mb Mb Mb MRFC SLF Dx Mp
37、PSTN PSTN Figure 2: Configuration of the UMTS IP Multimedia Subsystem 5.2.1 Call Session Control Function (CSCF) The CSCF can act as Proxy CSCF (P-CSCF), Serving CSCF (S-CSCF) or Interrogating CSCF (I-CSCF). The P-CSCF is the first contact point for the UE within the IM subsystem (IMS); the S-CSCF a
38、ctually handles the session states in the network; the I-CSCF is mainly the contact point within an operators network for all IMS connections destined to a subscriber of that network operator, or a roaming subscriber currently located within that network operators service area. Further definitions o
39、f the P-, S- and I-CSCF are provided in TS 123 228 7. NOTE: The CSCF is equivalent to the TIPHON CC entity. ETSI ETSI TS 102 284 V1.1.1 (2003-11) 9 5.2.2 Home Subscriber Server (HSS) This clause provides a high level and not exhaustive description of HSS functionality. IM CN subsystemCxC ShGr GcDMSC
40、 / VLRGMSCCS DomainSGSN GGSNPS DomainSIP ApplicationServerCSCFHSSMobility ManagementUser security info. generationUser security supportService Provisioning supportIdentification handlingService authorization supportAccess authorizationCall / Session establishment supportSiIM-SSFOSA-SCSApplication Se
41、rvices SupportgsmSCFCAMEL Services SupportFigure 3: HSS logical functions Mobility Management: - This function supports the user mobility through CS Domain, PS Domain and IM CN subsystem. Call and/or session establishment support: - The HSS supports the call and/or session establishment procedures i
42、n CS Domain, PS Domain and IM CN subsystem. For terminating traffic, it provides information on which call and/or session control entity currently hosts the user. User security information generation: - The HSS generates user authentication, integrity and ciphering data for the CS and PS Domains and
43、 for the IM CN subsystem. User security support. - The HSS supports the authentication procedures to access CS Domain, PS Domain and IM CN subsystem services by storing the generated data for authentication, integrity and ciphering and by providing these data to the appropriate entity in the CN (i.e
44、. MSC/VLR, SGSN or CSCF). User identification handling: - The HSS provides the appropriate relations among all the identifiers uniquely determining the user in the system: CS Domain, PS Domain and IM CN subsystem (e.g. IMSI and MSISDNs for CS Domain; IMSI, MSISDNs and IP addresses for PS Domain, pri
45、vate identity and public identities for IM CN subsystem). Access authorization: - The HSS authorizes the user for mobile access when requested by the MSC/VLR, SGSN or CSCF, by checking that the user is allowed to roam to that visited network. ETSI ETSI TS 102 284 V1.1.1 (2003-11) 10 Service authoriz
46、ation support: - The HSS provides basic authorization for MT call/session establishment and service invocation. Besides, the HSS updates the appropriate serving entities (i.e. MSC/VLR, SGSN, CSCF) with the relevant information related to the services to be provided to the user. Service Provisioning
47、Support: - The HSS provides access to the service profile data for use within the CS Domain, PS Domain and/or IM CN subsystem. Application Services and CAMEL Services Support. - The HSS communicates with the SIP Application Server and the OSA-SCS to support Application Services in the IM CN subsyste
48、m. It communicates with the IM-SSF to support the CAMEL Services related to the IM CN subsystem. It communicates with the gsmSCF to support CAMEL Services in the CS Domain and PS Domain. NOTE: The HSS is equivalent to the TIPHON registrar entity. 5.2.3 Media Gateway Control Function (MGCF) The MGCF:
49、 Controls the parts of the call state that pertain to connection control for media channels in an IMS-MGW. Communicates with CSCF. Selects the CSCF depending on the routing number for incoming calls from legacy networks. Performs protocol conversion between ISUP and the IM subsystem call control protocols. Out of band information assumed to be received in MGCF and may be forwarded to CSCF/IMS-MGW. NOTE: The MGCF is equivalent to the combination of elements in the TIPHON BC and CC entities. 5.2.4 IP Multimedia Subsystem - Medi
