ETSI TS 127 003 V3.2.0 (2000-01) TechnicalSpecification Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Terminal Adaptation Functions (TAF) for services using synchronous bearer capabilities (3G TS 27.003 version 3.2.0 Release 1999) R GLOBALSYSTEM FOR MOBILECOMMUNICATIONS (3GTS27.003version3.2.0Release1999) 1 ETSITS127003V3.2.0(2000-01) Reference DTS/TSGN-0327003U Keywords GSM,UMTS ETSI Postaladdress F-06921SophiaAntipolisCedex-FRANCE Officeaddress 650RoutedesLucioles-SophiaAntipolis Valbonne-FRANCE Tel.:+33492944200 Fax:+33493654716 SiretN°34862356200017-NAF742C Associationàbutnonlucratifenregistréeàla Sous-PréfecturedeGrasse(06)N°7803/88 Internet [email protected] IndividualcopiesofthisETSIdeliverable canbedownloadedfrom http://www.etsi.org Ifyoufinderrorsinthepresentdocument,sendyour commentto:[email protected] Importantnotice ThisETSIdeliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingor perceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF). Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetwork drivewithinETSISecretariat. CopyrightNotification Nopartmaybereproducedexceptasauthorizedbywrittenpermission. Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia. ©EuropeanTelecommunicationsStandardsInstitute2000. Allrightsreserved. ETSI (3GTS27.003version3.2.0Release1999) 2 ETSITS127003V3.2.0(2000-01) Intellectual Property Rights IPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.Theinformation pertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefound inSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespect ofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver (http://www.etsi.org/ipr). PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.Noguarantee canbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver) whichare,ormaybe,ormaybecome,essentialtothepresentdocument. Foreword ThisTechnicalSpecification(TS)hasbeenproducedbytheETSI3rdGenerationPartnershipProject(3GPP). Thepresentdocumentmayrefertotechnicalspecificationsorreportsusingtheir3GPPidentitiesorGSMidentities. TheseshouldbeinterpretedasbeingreferencestothecorrespondingETSIdeliverables.Themappingofdocument identitiesisasfollows: For3GPPdocuments: 3GTS|TRnn.nnn"<title>"(withorwithouttheprefix3G) isequivalentto ETSITS|TR1nnnnn"[Digitalcellulartelecommunicationssystem(Phase2+)(GSM);]UniversalMobile TelecommunicationsSystem;<title> ForGSMdocumentidentitiesoftype"GSMxx.yy",e.g.GSM01.04,thecorrespondingETSIdocumentidentitymaybe foundintheCrossReferenceListonwww.etsi.org/key ETSI 3G TS 27.003 version 3.2.0 Release 1999 3 3G TS 27.003 V3.2.0 (2000-01) Contents Foreword............................................................................................................................................................5 1 Scope........................................................................................................................................................6 2 Normative references...............................................................................................................................6 2.1 Abbreviations.....................................................................................................................................................8 3 General.....................................................................................................................................................8 3.1 Customer access configuration...........................................................................................................................8 3.2 Terminal Adaptation Function...........................................................................................................................9 3.3 TAF Interfacing to other MT functions..............................................................................................................9 4 Terminal Adaptation Functions for synchronous transparent services....................................................9 4.1 Rate Adaptation................................................................................................................................................10 4.1.1 Rate adaptation - V-series...........................................................................................................................10 4.1.2 Rate adaptation - X.21................................................................................................................................10 4.1.3 Rate adaptation - S-interface.......................................................................................................................10 4.2 Interchange Circuit Signalling Mapping..........................................................................................................12 4.22.1 V-series interchange circuit mapping.........................................................................................................12 4.2.1.1 Multislot configurations (Channel coding TCH/F9.6 or TCH/F4.8 kbit/s)...........................................14 4.2.1.2 Channel coding TCH/F14.4 and TCH/F28.8........................................................................................14 4.2.2 X.21 Interchange circuit mapping...............................................................................................................14 4.2.3 Case of S-interface......................................................................................................................................15 4.3 Call establishment signalling mapping at TE/MT interface.............................................................................15 4.3.1 V-series interfaces......................................................................................................................................15 4.3.1.1 Call establishment manual operation - utilizing Alternate Speech/Data or Speech followed by Data Capabilities...................................................................................................................................15 4.3.1.2 Call establishment manual operation - utilizing the Unrestricted Digital Capability............................15 4.3.1.3 V.25 bis auto call/auto answer..............................................................................................................16 4.3.2 X-series interfaces......................................................................................................................................16 4.3.2.1 X.21 bis call establishment manual operation - utilizing the Unrestricted Digital Capability..............16 4.3.2.2 X.21 bis/V.25 bis call establishment signalling mapping.....................................................................16 4.3.2.3 X.21 call establishment signalling mapping..........................................................................................17 4.3.3 S-interface (I.420) signalling mapping.......................................................................................................17 4.3.4 X.25 procedures mapping...........................................................................................................................17 5 Terminal Adaptation Functions for synchronous non-transparent services...........................................17 5.1 Rate Adaptation and protocol model................................................................................................................17 5.1.1 R-interface..................................................................................................................................................17 5.1.2 S-interface...................................................................................................................................................17 5.2 Signalling Mapping..........................................................................................................................................17 5.2.1 Interchange circuit signalling mapping.......................................................................................................17 5.2.2 Call establishment signalling mapping.......................................................................................................18 5.3 Flow Control....................................................................................................................................................18 5.3.1 Conditions requiring flow control towards the network.............................................................................18 5.3.2 Conditional requiring flow control towards TE2........................................................................................19 5.3.3 Local flow control.......................................................................................................................................19 5.4 Buffers..............................................................................................................................................................19 5.4.1 TX buffers...................................................................................................................................................19 5.4.2 RX buffers..................................................................................................................................................19 6 V- and S-series interface procedures to 04.08 mapping.........................................................................20 6.1 Mobile Originated calls....................................................................................................................................20 6.2 Mobile Terminated calls...................................................................................................................................20 7 X.21 interface procedures to 04.08 mapping.........................................................................................21 7.1 X.21 procedures mapping.................................................................................................................................21 7.1.1 Mobile originated call (see figure 10).........................................................................................................21 7.1.2 Mobile terminated call (see figure 10)........................................................................................................22 7.1.3 Mobile termination clearing (see figure 11)...............................................................................................22 3GPP 3G TS 27.003 version 3.2.0 Release 1999 4 3G TS 27.003 V3.2.0 (2000-01) 7.1.4 Distant end terminal clearing......................................................................................................................22 7.1.5 Network generated clearing (see figure 11)................................................................................................22 7.2 Dm Signalling causes mapping to X.21 call progress signals..........................................................................24 7.3. X.21 FACILITIES MAPPING.........................................................................................................................25 8 Support for packet service......................................................................................................................26 8.1 Terminal configurations...................................................................................................................................26 8.2 Support for basic packet access........................................................................................................................27 8.3 VOID................................................................................................................................................................27 Annex A (normative): L2R Functionality....................................................................................................28 A.1 Introduction............................................................................................................................................28 A.2 L2RBOP.................................................................................................................................................28 A.3 Use of the L2RBOP...............................................................................................................................30 A.3.1 Radio Link Connection Control.......................................................................................................................30 A.3.2 Status transfer...................................................................................................................................................30 A.3.3 LAPB connection control.................................................................................................................................31 A.3.4 LAPB exchange identification.........................................................................................................................31 A.3.5 Data Transfer....................................................................................................................................................31 A.3.6 Flow control.....................................................................................................................................................31 Annex B: Change history...............................................................................................................................32 History...............................................................................................................................................33 3GPP 3G TS 27.003 version 3.2.0 Release 1999 5 3G TS 27.003 V3.2.0 (2000-01) Foreword This Technical Specification has been produced by the 3GPP. This TS defines the interfaces and Terminal Adaptation Functions (TAF) integral to a Mobile Termination (MT) which enables the attachment of synchronous terminals to a MT within the 3GPP system. The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of this TS, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version 3.y.z where: 3 the first digit: 3 Indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the specification; 3GPP 3G TS 27.003 version 3.2.0 Release 1999 6 3G TS 27.003 V3.2.0 (2000-01) 1 Scope This Technical Specification (TS) defines Terminal Adaptation Functions (TAF) which are integrated in a Mobile Termination (MT) and which enable the attachment of Synchronous Terminals to an MT (see GSM 04.02 [4]). The general aspects of Terminal Adaptation Functions are contained in specification GSM 07.01 [8]. This ETS covers support of synchronous data services (see GSM 02.02 [2]) for the following interfaces and procedures: - V.22 DTE/DCE Interface - V.22 bis DTE/DCE Interface - V.26 ter DTE/DCE Interface - V.32 DTE/DCE Interface - X.21 DTE/DCE Interface - X.21 bis DTE/DCE Interface - X.25 Procedure - X.32 Procedure - V.25 bis Procedure - I.420 Interface (S) LAPB is the only synchronous non-transparent protocol which is considered here. Note: From GSM R99 onwards the following services are no more required to be provided by a GSM PLMN: • the dual Bearer Services “alternate speech/data” and “speech followed by data” • the dedicated services for PAD and Packet access • BS 21 ... 26 and BS 31 ... 34 The support of those services is still optional. The specification of these services is not within the scope of this TS. For that, the reader is referred to GSM Release 98. 2 Normative references References may be made to: a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in which case, subsequent revisions to the referenced document do not apply; or b) all versions up to and including the identified version (identified by "up to and including" before the version identity); or c) all versions subsequent to and including the identified version (identified by "onwards" following the version identity); or d) publications without mention of a specific version, in which case the latest version applies. A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same number. [1] GSM 01.04: "Digital cellular telecommunication system (Phase 2+); Abbreviations and acronyms". [2] GSM 02.02: "Digital cellular telecommunication system (Phase 2+); Bearer Services (BS) supported by a GSM Public Land Mobile Network (PLMN)". 3GPP 3G TS 27.003 version 3.2.0 Release 1999 7 3G TS 27.003 V3.2.0 (2000-01) [3] GSM 03.10: "Digital cellular telecommunication system (Phase 2+); GSM Public Land Mobile Network (PLMN) connection types". [4] GSM 04.02: "Digital cellular telecommunication system (Phase 2+); GSM Public Land Mobile Network (PLMN) access reference configuration". [5] GSM 04.08: "Digital cellular telecommunication system (Phase 2+); Mobile radio interface layer 3 specification". [6] GSM 04.21: "Digital cellular telecommunication system (Phase 2+); Rate adaption on the Mobile Station - Base Station System (MS - BSS) interface". [7] GSM 04.22: "Digital cellular telecommunication system (Phase 2+); Radio Link Protocol (RLP) for data and telematic services on the Mobile Station - Base Station System (MS - BSS) interface and the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface". [8] GSM 07.01: "Digital cellular telecommunication system (Phase 2+); General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)". [9] GSM 08.20: "Digital cellular telecommunication system (Phase 2+); Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface". [10] GSM 09.06: "Digital cellular telecommunication system (Phase 2+); Interworking between a Public Land Mobile Network (PLMN) and a Packet Switched Public Data Network/Integrated Services Digital Network (PSPDN/ISDN) for the support of packet switched data transmission services". [11] GSM 09.07: "Digital cellular telecommunication system (Phase 2+); General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)". [12] CCITT Series V Recommendations: "Data communication over the Telephone network". [13] CCITT Series X Recommendations: "Data communication networks". [14] CCITT Recommendation V.10: "Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications". [15] CCITT Recommendation V.11: "Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications". [16] CCITT Recommendation V.25: "Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls". [17] CCITT Recommendation V.25 bis: "Automatic Calling and/or Answering Equipment on the General Switched Telephone Network (GSTN) using the 100-series interchange circuits". [18] CCITT Recommendation V.28: "Electrical characteristics for unbalanced double-current interchange circuits". [19] CCITT Recommendation V.110: "Support of data terminal equipments (DTEs) with V-Series interfaces by an integrated services digital network". [20] CCITT Recommendation V.24: "List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment". [21] CCITT Recommendation X.24: "List of definitions for interchange circuits between Data Terminal Equipment (DTE) and Data Circuit Terminating Equipment (DCE) on Public Data Networks". [22] CCITT Recommendation X.25: "Interface between Data Terminal Equipment (DTE) and Data Circuit Terminating Equipment (DCE) for terminals operating in Packet Mode and connected to Public Data Networks by dedicated Circuit". 3GPP 3G TS 27.003 version 3.2.0 Release 1999 8 3G TS 27.003 V3.2.0 (2000-01) [23] CCITT Recommendation X.21: "Interface between Data Terminal Equipment (DTE) and Data Circuit Terminating Equipment (DCE) for synchronous operation in public data networks". [24] CCITT Recommendation X.21 bis: "Use on public data networks of data terminal equipment (DTE) which is designed for interfacing to synchronous V-Series modems". [25] CCITT Recommendation X.26: "Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications". [26] CCITT Recommendation X.27: "Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications". [27] CCITT Recommendation X.30: "Support of X.21, X.21 bis and X.20 bis based Data Terminal Equipment (DTEs) by an ISDN". [28] CCITT Recommendation X.31: "Support of Packet Mode Terminal Equipment in ISDN". [29] CCITT Recommendation X.32: "Interface between Data Terminal Equipment (DTE) and Data Circuit Terminating Equipment (DCE) for terminals operating in Packet Mode and accessing a PSPDN through a PSTN or an ISDN or a CSPDN". [30] CCITT Recommendation I.461: "Support of X.21, X.21 bis and X.20 bis based data terminal equipment (DTEs) by integrated services digital network (ISDN)". [31] CCITT Recommendation I.463: "Support of data terminal equipment (DTEs) with V-Series type interfaces by an integrated services digital network (ISDN)". [32] ISO Recommendation 8885: "Information technology - Telecommunication and information exchange between systems - High-level data link control (HDLC) procedures - General purpose XID frame information field content and format". [33] ISO Recommendation 8886: "Information technology - Telecommunication and information exchange between systems - Data link service definitions for Open Systems interconnection". [34] Personal Computer Memory Card Association: "PCMCIA 2.1 or PC-Card 3.0 electrical specification or later revisions". [35] Infrared Data Association IrDA "IrPHY Physical layer signalling standard". [36] TIA-617: "Data Transmission Systems and Equipment - In-Band DCE Control". [37] GSM 02.34: "Digital cellular telecommunications system (Phase 2+); High Speed Circuit Switched Data (HSCSD) - Stage 1". [38] GSM 03.34: "Digital cellular telecommunications system (Phase 2+); High Speed Circuit Switched Data (HSCSD) -Stage 2 Service Description". 2.1 Abbreviations In addition to those below abbreviations used in this TS are listed in GSM 01.04 [1]. AU Access Unit 3 General 3.1 Customer access configuration The GSM PLMN access reference configuration is described in figure 1 of GSM 04.02 [4]. This specification (GSM 07.03) specifically refers to the MTs which support terminal equipments (TE1 or TE2) that use synchronous bearer capabilities. 3GPP 3G TS 27.003 version 3.2.0 Release 1999 9 3G TS 27.003 V3.2.0 (2000-01) 3.2 Terminal Adaptation Function The TAF is functionally part of an MT0, MT1 or MT2 (see GSM 04.02 [4]). The terminal adaptation provides facilities to allow manual or automatic call control functions associated with alternate speech/data, speech followed by data and circuit switched data services, in case of V series interfaces. The X.21 DTE/DCE interface allows only for automatic call control functions. The following functions are included: - Conversion of electrical, mechanical, functional and procedural characteristics of the V-series, X-series and ISDN type interfaces to those required by a GSM PLMN. - Bit rate adaptation of V-series and X-series data signalling rates and the ISDN 64 kbit/s to that provided in the GSM PLMN. - The mapping of V.25 bis AUTO CALL/AUTO ANSWER procedures and X.21 procedures to the GSM PLMN Dm-channel signalling. - The mapping functions necessary to convert S-interface signalling to PLMN Dm-channel signalling. - Synchronization procedure, which means the task of synchronizing the entry to and the exit from the data transfer phase between two subscriber terminals. This is described in the specification GSM 07.01 [8]. - Filtering of channel control information. This is described in the specification GSM 07.01 [8]. - Compatibility checking (see GSM 07.01 [8]) - Layer 2 relaying (see annex 1) - Flow control - In Call Modification function (see section 4) - Splitting and combining of the data flow in case of multi substream data configurations 3.3 TAF Interfacing to other MT functions TAF interfacing is shown in figure 1. Mobility Management TAF RR Management Channel Codec FEC MMI Call Control Figure 1: TAF interfacing to other MT functions 4 Terminal Adaptation Functions for synchronous transparent services Specification GSM 03.10 [3] refers to the models for connection types supporting synchronous transparent services. 3GPP