1、 ETSI TS 101 885 V4.1.1 (2003-11)Technical Specification Telecommunications and Internet ProtocolHarmonization Over Networks (TIPHON) Release 4;Interface Protocol Requirements Definition;Implementation of TIPHON using H.248/MEGACOETSI ETSI TS 101 885 V4.1.1 (2003-11) 2 Reference RTS/TIPHON-03019R4 K
2、eywords architecture, configuration, internet, network, protocol, telephony 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
3、) 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 referen
4、ce 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 revision or change
5、 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, send your comment to: editoretsi.org Copyright Notification No part may be reproduced except as authorized by written
6、permission. 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 Tr
7、ade 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 101 885 V4.1.1 (2003-11) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 Referen
8、ces 5 3 Definitions and abbreviations.6 3.1 Definitions6 3.2 Abbreviations .7 4 General mapping considerations 8 4.1 Overview 8 4.2 Identifiers mapping.8 4.3 TIPHON meta-protocol media flow resource reservation9 4.4 TIPHON meta-protocol media flow activation 9 4.5 TIPHON meta-protocol media flow rel
9、ease.10 4.6 H248/MEGACO descriptor10 4.7 H248/MEGACO properties10 4.8 H248/MEGACO events .11 4.9 H248/MEGACO signals.12 4.10 H248/MEGACO statistics12 4.11 H248/MEGACO procedures 13 4.12 H248/MEGACO errors 13 4.13 MGC-MG control interface14 4.14 Management operations .14 4.15 Supported bearer types .
10、14 4.16 Supported packages14 4.17 General note on compliance .14 5 TIPHON meta-protocol to H248/MECACO mapping.14 5.1 General notes14 5.2 Code point mapping .15 5.2.1 Primitives mappings .15 5.2.2 Binary Encoding .15 5.2.3 Text Encoding.16 5.3 Error reasons 18 Annex A (informative): Bibliography.20
11、History 22 ETSI ETSI TS 101 885 V4.1.1 (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 these essential IPRs, if any, is publicly available for ETSI members and non-members, and can
12、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). Pursuan
13、t 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 SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. F
14、oreword This Technical Specification (TS) has been produced by ETSI Project Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON). ETSI ETSI TS 101 885 V4.1.1 (2003-11) 5 1 Scope The present document describes how the H.248/MEGACO protocol (1 to 21) can be used to implement t
15、he architecture, defined in TS 101 314 24 and the primitives, information elements and behaviours, defined in TS 101 882-4 22 and TS 101 882-5 23. The present document defines the mapping of the Media Control meta-protocol. The document is applicable to all equipments and entities within a network t
16、hat are necessary to support TIPHON Release 4 architecture. 2 References The following documents contain provisions which, through 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
17、 number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest 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 ITU-T Recom
18、mendation H.248.1 (2002): “Gateway control protocol Version 2“. 2 ITU-T Recommendation H.248.2: “Gateway control protocol: Facsimile, text conversation and call discrimination packages“. 3 ITU-T Recommendation H.248.3: “Gateway control protocol: User interface elements and actions packages“. 4 ITU-T
19、 Recommendation H.248.4: “Gateway control protocol: Transport over Stream Control Transmission Protocol (SCTP)“. 5 ITU-T Recommendation H.248.5: “Gateway control protocol: Transport over ATM“. 6 ITU-T Recommendation H.248.6: “Gateway control protocol: Dynamic Tone Definition package“. 7 ITU-T Recomm
20、endation H.248.7: “Gateway control protocol: Generic announcement package“. 8 ITU-T Recommendation H.248.8: “Gateway control protocol: Error code and service change reason description“. 9 ITU-T Recommendation H.248.9: “Gateway control protocol: Advanced media server packages“. 10 ITU-T Recommendatio
21、n H.248.10: “Gateway control protocol: Media gateway resource congestion handling package“. 11 ITU-T Recommendation H.248.11: “Gateway control protocol: Media gateway overload control package“. 12 ITU-T Recommendation H.248.12: “Gateway control protocol: H.248.1 packages for H.323 and H.324 interwor
22、king“. 13 ITU-T Recommendation H.248.13: “Gateway control protocol: Quality Alert Ceasing package“. 14 ITU-T Recommendation H.248.14: “Gateway control protocol: Inactivity timer package“. 15 ITU-T Recommendation H.248.15: “Gateway control protocol: SDP H.248 package attribute“. ETSI ETSI TS 101 885
23、V4.1.1 (2003-11) 6 16 ITU-T Recommendation H.248.16: “Gateway control protocol: Enhanced digit collection packages and procedures“. 17 ITU-T Recommendation H.248.17: “Gateway control protocol: Line test package“. 18 ITU-T Recommendation H.248.18: “Gateway control protocol: Package for support of mul
24、tiple profiles“. 19 ITU-T Recommendation H.248.20: “Gateway control protocol: The use of local and remote descriptors with H.221 and H.223 multiplexing“. 20 IETF RFC 3525: “Gateway Control Protocol Version 1“. 21 draft-ietf-megaco-h248v2: “The Megaco/H.248v2 Gateway Control Protocol, version 2“. 22
25、ETSI TS 101 882-4 (V4.1.1): “Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 4; Protocol Framework Definition; Part 4: Media control meta protocol“. 23 ETSI TS 101 882-5 (V4.1.1): “Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Rel
26、ease 4; Protocol Framework Definition; Part 5: Transport control service“. 24 ETSI TS 101 314 (V4.1.1): “Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 4; Abstract Architecture and Reference Points Definition; Network Architecture and Reference Points“. 25 ETSI
27、 TS 101 332 (V4.1.1): “Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 4; Interface Protocol Requirements Definition; TIPHON Extended H.248/MEGACO Package (EMP) Specification; ICF Control over Reference Point“. 26 ETSI TS 102 108 (V4.1.1): “Telecommunications an
28、d Internet Protocol Harmonization Over Networks (TIPHON) Release 4; H.248/MEGACO Profile for TIPHON reference point I3; InterConnect Function (ICF) control over reference point I3“. 27 ETSI TS 102 229 (V4.1.1): “Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 4;
29、 Aggregate Bearer Load Control - H.248 Package“. 28 IETF RFC 3551: “RTP Profile for Audio and Video Conferences with Minimal Control“. 29 IETF RFC 2327: “SDP: Session Description Protocol“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms
30、and definitions apply: Aggregate Bearer: logical association of functional entities in an IP Telephony application and Transport Network, which creates one or more concurrent end-to-end media, flows and which is not limited to the duration of a single call Aggregate Bearer Admission Control (ABAC) f
31、unction: Functional Entity (FE) that determines whether or not a flow is to be admitted as part of an established Aggregate Bearer Aggregate Bearer Measurement (ABM) function: function that determines the capacity used and remaining in an Aggregate Bearer as a result of measuring the actual media fl
32、ows after taking into account what flows were requested codec: combined speech encoder and decoder flow: single data stream, identified by a tuple of characteristic values (source address, source port, destination address, destination port, protocol number) functional entity: entity in a system that
33、 performs a specific set of functions ETSI ETSI TS 101 885 V4.1.1 (2003-11) 7 functional group: collection of functional entities within a domain InterConnection function (ICF): functional entity connecting two networks having differing administrative policy such as Quality of Service (QoS) or addre
34、ssing policy but employing the same signalling protocol, and transport technology, at the point of interconnect IP address: each network unit connected to an IP network must have a unique Internet or IP address IP endpoint: device that originates or terminates the IP based part of a call IP network:
35、 packet transport network comprising one or more transport domains each employing the IP protocol network: telecommunications network that provides telecommunications services protocol: set of semantics, syntax and procedures, which govern the exchange of information across an interface Quality of S
36、ervice (QoS): quality specification of a telecommunications channel, system, virtual channel, computer-telecommunications session, etc. Switched Circuit Network (SCN): telecommunications network, e.g. Public Switched Telephone Network (PSTN), Integrated Services Digital Network (ISDN), and General S
37、ystem for Mobile communications (GSM), that uses circuit-switched technologies for the support of voice calls terminal: endpoint within the user equipment on which signalling and media flows originate and/or terminate TIPHON compliant: entity that complies with the mandatory requirements identified
38、in the TIPHON requirements documents together with compliance to the parts of the TIPHON specifications in which these requirements are embodied Transport Resource Manager (TRM): Functional Entity (FE) that applies a set of policies and mechanisms to a set of transport resources to ensure that those
39、 resources are allocated such that they are sufficient to enable transport flows with QoS guarantees across the domain of control of the TRM 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ABAC Aggregate Bearer Admission Control ABM Aggregate Bearer Mea
40、surement BC Bearer Control CC Call Control CFE simple Call Functional Entity FE Functional Entity GSM General System for Mobile communications ICF InterConnection Function IP Internet Protocol ISDN Integrated Services Digital Network MC Media Control MG Media Gateway MGC Media Gateway Control PSTN P
41、ublic Switched Telephone Network QoS Quality of Service SCN Switched Circuit Network TRM Transport Resource Manager ETSI ETSI TS 101 885 V4.1.1 (2003-11) 8 4 General mapping considerations 4.1 Overview The present document describes an implementation of the meta-protocol described in TS 101 882-4 22
42、 and TS 102 229 27 for reference point Nx, described in TS 101 882-5 23 for reference point Tx and described in TS 101 332 25 and TS 102 108 26 for reference point I3, producing an interoperable profile of H.248/MEGACO protocol (1 to 21). Figure 1 shows the relationship between TIPHON architecture a
43、nd H248/MEGACO. Media Gateway ControllerNx MC ABM Gateway Control Load Control Media Gateway Tx TRM ABAC ICF ABM H248 MEGACO Call Agent I3 Transport Figure 1: Relationship between TIPHON architecture and H248/MEGACO H.248/MEGACO protocol (1 to 21) has been created to control a range of media devices
44、. It describes the exchanges and behaviours of messages between a Media Gateway Controller (MGC) and a Media Gateway (MG). Functionally, the H248/MEGACO MGC is included as part of the MC, TRM, ABM, ABAC functional entities of the TIPHON architecture as shown in figure 1. Functionally the H248/MEGACO
45、 MG is included in the ICF, ABM functional entities of the Transport entity of the TIPHON architecture as shown in figure 1. The implementation of H248/MEGACO as distributed parts included in TIPHON functional entities or as unique piece interfaced by the functional entities is out of scope of the p
46、resent documents and is implementation specific of TIPHON architecture. Behaviour of a compliant implementation of a H.248/MEGACO protocol (1 to 21) within the TIPHON architecture when an H.248/MEGACO information element is received (descriptor or parameter), which is not within the context of the p
47、resent document is out of scope of the present specification and is implementation specific. 4.2 Identifiers mapping H248/MEGACO protocol (1, 20, 21) defines some concepts linked to identifiers such as ContextId, TerminationID and StreamID. TIPHON meta-protocol (22, 23) defines also some concepts li
48、nked to identifiers such as mediaResourceHandle, flowDescriptorHandle and BearerIdentifier. ETSI ETSI TS 101 885 V4.1.1 (2003-11) 9 To permit a clear interaction between TIPHON meta-protocol (22, 23) and H248/MEGACO protocol (1, 20, 21) an association between identifiers of the two sides shall be pr
49、ovided conforming to the following text. A two-way relation shall be established between H248/MEGACO (1, 20, 21) ContextId and TIPHON meta-protocol (22, 23) BearerIdentifier, such that it is always possible to obtain the value of one by providing the value of the other. Depending of the behaviour of the two protocols it is possible that, for a short duration, the two identifiers are not known at the establishment of the corresponding process. Due to the
