SIST EN 301 707 V7.1.1:2003

Digital cellular telecommunications system (Phase 2+) (GSM); Discontinuous Transmission (DTX) for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.93 version 7.1.1 Release 1998)

Adaptive Multi- Rate (AMR)  Comfort noise

Digitalni celični telekomunikacijski sistem (faza 2+) – Nezvezno oddajanje (DTX) pri prilagodljivih večhitrostnih (AMR) govornih prometnih kanalih (GSM 06.93, različica 7.1.1, izdaja 1998)

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: T-172
• Ref Project: ETSI EN 301 707 V7.1.1 (1999-12) - Digital cellular telecommunications system (Phase 2+) (GSM); Discontinuous Transmission (DTX) for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.93 version 7.1.1 Release 1998)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Discontinuous Transmission (DTX) for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.93 version 7.1.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 301 707 Version 7.1.1SIST EN 301 707 V7.1.1:2003en01-december-2003SIST EN 301 707 V7.1.1:2003SLOVENSKI
STANDARD



SIST EN 301 707 V7.1.1:2003



ETSIEN301707V7.1.1(1999-12)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationsystem(Phase2+);DiscontinuousTransmission(DTX)forAdaptiveMulti-Rate(AMR)speechtrafficchannels(GSM06.93version7.1.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 301 707 V7.1.1:2003



ETSIETSIEN301707V7.1.1(1999-12)2(GSM06.93version7.1.1Release1998)ReferenceDEN/SMG-110693Q7KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM),AMRETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 301 707 V7.1.1:2003



ETSIETSIEN301707V7.1.1(1999-12)3(GSM06.93version7.1.1Release1998)ContentIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitions,symbolsandabbreviations.63.1Definitions.63.2Symbols.63.3Abbreviations.64General.74.1Generalorganisation.75Transmit(TX)side.75.1Generaloperation.85.1.1FunctionsoftheTXDTXhandler.85.1.2FunctionsoftheTXRadioSubsystem.95.1.2.1FunctionsoftheTXRadioSubsystemforTCH/AFS.105.1.2.2FunctionsoftheTXRadioSubsystemforTCH/AHS.106Receive(RX)side.116.1Generaloperation.116.1.1FunctionsoftheRXradiosubsystem.116.1.2FunctionsoftheRXDTXhandler.12AnnexA(informative):Documentchangehistory.13History.14SIST EN 301 707 V7.1.1:2003



ETSIETSIEN301707V7.1.1(1999-12)4(GSM06.93version7.1.1Release1998)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbySpecialMobileGroup(SMG).ThepresentdocumentdescribesthegeneralbasebandoperationofAdaptiveMultiRatespeechtrafficchannelsinthetransmitterandinthereceiverofGSMMobileStationsandBaseStationSystemsduringDiscontinuousTransmission(DTX)withinthedigitalcellulartelecommunicationssystem.ThepresentdocumentcorrespondstoGSMtechnicalspecification,GSM06.93AMR,versionX.X.X.ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesRelease1998ofGSMPhase2+xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:3December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 301 707 V7.1.1:2003



ETSIETSIEN301707V7.1.1(1999-12)5(GSM06.93version7.1.1Release1998)1ScopeThepresentdocumentgivesadescriptionofthegeneralbasebandoperationofAdaptiveMultiRatespeechtrafficchannelsinthetransmitterandinthereceiverofGSMMobileStations(MS)sandBaseStationSystems(BSS)sduringDiscontinuousTransmission(DTX).Forclarity,thedescriptionisstructuredaccordingtotheblockdiagramsinfigures1and3.Exceptinthecasedescribednext,thisstructureofdistributingthevariousfunctionsbetweensystementitiesisnotmandatoryforimplementation,aslongastheoperationontheairinterfaceandonthespeechdecoderoutputremainsthesame.InthecaseofBSSswherethespeechtranscoderislocatedremotelyintheBaseStationController(BSC),theimplementationoftheinterfacesbetweentheDTXhandlersandtheRadioSubSystem(RSS)asdescribedinthepresentdocumenttogetherwithalltheirflagsismandatory,beingpartoftheA-bisinterfaceasdescribedinGSM08.60[13].TheDTXfunctionsdescribedinthistechnicalspecificationaremandatoryforimplementationintheGSMMSs.ThereceiverrequirementsaremandatoryforimplementationinallGSMBSSs,thetransmitterrequirementsonlyforthosewheredownlinkDTXwillbeused.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.•ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationsystem(Phase2+);Abbreviationsandacronyms".[2]GSM04.08:"Digitalcellulartelecommunicationsystem(Phase2+);Mobileradiointerfacelayer3specification".[3]GSM05.03:"Digitalcellulartelecommunicationsystem(Phase2+);Channelcoding".[4]GSM05.05:"Digitalcellulartelecommunicationsystem(Phase2+);Radiotransmissionandreception".[5]GSM05.08:"Digitalcellulartelecommunicationsystem(Phase2+);Radiosubsystemlinkcontrol".[6]GSM06.71:"Digitalcellulartelecommunicationssystem(Phase2+);AdaptiveMulti-Rate(AMR)speechprocessingfunctions;Generaldescription".[7]GSM06.73:"Digitalcellulartelecommunicationssystem(Phase2+);ANSI-CcodefortheGSMAdaptiveMulti-Ratespeechcodec".[8]GSM06.74:"Digitalcellulartelecommunicationssystem(Phase2);TestvectorsfortheGSMAdaptiveMulti-Ratespeechcodec".[9]GSM06.90:"Digitalcellulartelecommunicationssystem(Phase2+);AdaptiveMulti-Ratespeechtranscoding".SIST EN 301 707 V7.1.1:2003



ETSIETSIEN301707V7.1.1(1999-12)6(GSM06.93version7.1.1Release1998)[10]GSM06.91:"Digitalcellulartelecommunicationssystem(Phase2+);SubstitutionandmutingoflostframeforAdaptiveMulti-Ratespeechtrafficchannels".[11]GSM06.92:"Digitalcellulartelecommunicationssystem(Phase2+);ComfortnoiseaspectsforAdaptiveMulti-Ratespeechtrafficchannels".[12]GSM06.94:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceActivityDetector(VAD)forAdaptiveMulti-Ratespeechtrafficchannels".[13]GSM05.09:"Digitalcellulartelecommunicationsystem(Phase2+);LinkAdaptation".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposeofthepresentdocument,thefollowingtermsanddefinitionsapply.frame:Timeintervalof20msec.correspondingtothetimesegmentationoftheAdaptiveMultiRatespeechtranscoder(GSM06.90[9]),alsousedasashorttermforatrafficframe.trafficframe:Blockof95.244informationbitstransmittedontheTCH/AFSorTCH/AHSspeechtrafficchannels.SIDframe:FramecharacterisedbytheSID(SilenceDescriptor)grossbitpattern.Itmayconveyinformationontheacousticbackgroundnoise.speechframe:TrafficframethathasbeenclassifiedasaSPEECHframe.VADflag:Booleanflag,generatedbytheVADalgorithmdefinedinGSM06.94[12]indicatingthepresence("1")ortheabsence("0")ofaspeechframe.RX_TYPE:flagwitheightvalues,generatedbytheRXradiosubsystem,indicatingtotheRXDTXhandlerthetypeofdatainthecurrentframe.RefertoTable2.TX_TYPE:flagwithfourvalues,generatedbytheTXDTXhandler,indicatingtotheTXradiosubsystemthetypeofdatainthecurrentframe.RefertoTable1.hangoverperiod:Aperiodof7framesaddedattheendofaspeechburstinwhichVADflag="0"andTX_TYPEis="00".3.2SymbolsForthepurposeofthepresentdocument,thefollowingsymbolsapply.NelapsedNumberofelapsedframessincethelastupdatedSIDframe.3.3AbbreviationsForthepurposeofthepresentdocument,thefollowingabbreviationsapply.BSCBaseStationControllerBSSBaseStationSystemCHDChannelDecoderCHEChannelEncoderDTXDiscontinuousTransmissionETSEuropeanTelecommunicationStandardFACCHFastAssociatedControlCHannelGSMGlobalSystemforMobileTelecommunicationsMSMobileStationSIST EN 301 707 V7.1.1:2003



ETSIETSIEN301707V7.1.1(1999-12)7(GSM06.93version7.1.1Release1998)RSSRadioSubSystemRXReceiveSACCHSlowAssociatedControlCHannelSIDSilenceDescriptor(ReallyBackgroundDescriptor)TXTransmitVADVoiceActivityDetectorForabbreviationsnotgiveninthissubclause,seeGSM01.04[1].4GeneralDiscontinuousTransmission(DTX)isamechanismwhichallowstheradiotransmittertobeswitchedoffmostofthetimeduringspeechpausesforthefollowingtwopurposes:-tosavepowerintheMobileStation(MS);-toreducetheoverallinterferencelevelovertheairinterface.DTXshallbeinoperationinGSMMSifcommandedsobythenetwork,seeGSM04.08[2].4.1GeneralorganisationTheoverallDTXmechanismdescribedinthepresentdocumentrequiresthefollowingfunctions:-aVoiceActivityDetector(VAD)onthetransmit(TX)side;-evaluationofthebackgroundacousticnoiseonthetransmit(TX)side,inordertotransmitcharacteristicparameterstothereceive(RX)side;-generationonthereceive(RX)sideofasimilarnoise,calledcomfortnoise,duringperiodswheretheradiotransmissionisswitchedoff.TheVoiceActivityDetector(VAD)isdefinedinGSM06.94[12]andthecomfortn
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