SIST EN 300 729 V7.1.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Discontinuous Transmission (DTX) for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.81 version 7.1.1 Release 1998)
General Information
- Abstract
Upgrade from Phase 2+ to Release 1998
- Status
- Published
- Publication Date
- 30-Nov-2003
- 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
Overview
SIST EN 300 729 V7.1.1:2003 defines the requirements for Discontinuous Transmission (DTX) in Enhanced Full Rate (EFR) speech traffic channels for GSM digital cellular telecommunications systems. This European standard, aligned with the GSM 06.81 specification (Release 1998), outlines the baseband operations necessary for efficient network transmission and reception, focusing on both mobile stations (MS) and base station systems (BSS).
DTX technology improves network performance by allowing the transmitter to be switched off during speech pauses. This mechanism not only conserves mobile device battery life but also reduces overall radio interference across GSM networks. The standard ensures DTX functions are consistently implemented, enabling enhanced speech quality and resource efficiency across Phase 2+ GSM networks as upgraded to Release 1998.
Key Topics
1. Discontinuous Transmission (DTX) Operation
- DTX enables the transmission to be paused during silence periods, reducing power usage and channel interference.
- Mandatory implementation for GSM mobile stations if commanded by the network.
- Required in BSS receivers and in BSS transmitters when downlink DTX is utilized.
2. Enhanced Full Rate (EFR) Speech Channels
- EFR channels offer improved voice quality over standard full-rate codecs.
- The standard describes integration of DTX functionality into these EFR speech channels.
3. Baseband Operation Structure
- The document details both the transmitter (TX) and receiver (RX) side DTX processes.
- TX Side: Integrates Voice Activity Detection (VAD), calculation of comfort noise parameters, and signaling using silence descriptor (SID) frames.
- RX Side: Handles detection and classification of incoming frames, comfort noise generation, and error management (such as frame substitution and muting).
4. Comfort Noise Generation
- During transmission gaps, the receiver generates artificial background (comfort) noise for natural listening experience.
5. Synchronization and Handover Management
- The standard addresses procedures to maintain correct DTX operation during network handovers, ensuring uninterrupted and consistent user experience.
Applications
- Mobile Network Infrastructure: Ensures network elements like base transceiver stations (BTS) and base station controllers (BSC) properly support DTX for EFR speech, contributing to improved network efficiency.
- Mobile Devices: Guides manufacturers of GSM mobile stations to implement compliant DTX mechanisms, resulting in longer battery life and better call quality for users.
- Digital Mobile Communications: Enables operators to reduce co-channel interference and maximize channel use, directly supporting greater network call capacity and quality.
- Interoperability and Upgrades: Facilitates seamless upgrades from earlier Phase 2+ systems to Release 1998, preserving investment in network equipment.
Related Standards
For comprehensive implementation and reference, the following standards are closely related:
- GSM 06.51: General description of EFR speech processing functions.
- GSM 06.60: EFR speech transcoding procedures.
- GSM 06.62: Comfort noise aspects for EFR speech traffic channels.
- GSM 06.82: Voice Activity Detector (VAD) for EFR speech channels.
- GSM 05.08: Radio subsystem link control procedures.
- GSM 08.60: Inband control of remote transcoders and rate adaptors.
Additional references include GSM specifications for channel coding, radio transmission and reception, and error handling for lost or corrupted speech frames.
By adhering to SIST EN 300 729 V7.1.1:2003, telecommunications providers create a more efficient and compatible GSM ecosystem that supports advanced speech quality and optimal use of resources in both existing and upgraded digital mobile infrastructures.
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Frequently Asked Questions
SIST EN 300 729 V7.1.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Discontinuous Transmission (DTX) for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.81 version 7.1.1 Release 1998)". This standard covers: Upgrade from Phase 2+ to Release 1998
Upgrade from Phase 2+ to Release 1998
SIST EN 300 729 V7.1.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.50 - Global System for Mobile Communication (GSM). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 729 V7.1.1:2003 is associated with the following European legislation: Standardization Mandates: T-172. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 729 V7.1.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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 Enhanced Full Rate (EFR) speech traffic channels (GSM 06.81 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 300 729 Version 7.1.1SIST EN 300 729 V7.1.1:2003en01-december-2003SIST EN 300 729 V7.1.1:2003SLOVENSKI
STANDARD
ETSIEN300729V7.1.1(2000-04)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);DiscontinuousTransmission(DTX)forEnhancedFullRate(EFR)speechtrafficchannels(GSM06.81version7.1.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 729 V7.1.1:2003
ETSIETSIEN300729V7.1.1(2000-04)2(GSM06.81version7.1.1Release1998)ReferenceREN/SMG-020681Q7R1KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 729 V7.1.1:2003
ETSIETSIEN300729V7.1.1(2000-04)3(GSM06.81version7.1.1Release1998)ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitions,symbolsandabbreviations.63.1Definitions.63.2Symbols.73.3Abbreviations.74General.74.1Generalorganization.75Transmit(TX)side.85.1Generaloperation.85.1.1FunctionsoftheTXDTXhandler.85.1.2FunctionsoftheTXRadioSubsystem.106Receive(RX)side.116.1Generaloperation.116.1.1FunctionsoftheRXradiosubsystem.116.1.2FunctionsoftheRXDTXhandler.12AnnexA(informative):ChangeRequestHistory.13History.14SIST EN 300 729 V7.1.1:2003
ETSIETSIEN300729V7.1.1(2000-04)4(GSM06.81version7.1.1Release1998)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)hasbeenproducedbytheSpecialMobileGroup(SMG).ThepresentdocumentdescribesthegeneralbasebandoperationofEnhancedFullRatespeechtrafficchannelsinthetransmitterandinthereceiverofGSMMobileStationsandBaseStationSystemsduringDiscontinuousTransmission(DTX)withinthedigitalcellulartelecommunicationssystem.ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesRelease1998ofGSMPhase2+.xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:31March2000DateoflatestannouncementofthisEN(doa):30June2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31December2000DateofwithdrawalofanyconflictingNationalStandard(dow):31December2000SIST EN 300 729 V7.1.1:2003
ETSIETSIEN300729V7.1.1(2000-04)5(GSM06.81version7.1.1Release1998)1ScopeThepresentdocumentgivesadescriptionofthegeneralbasebandoperationofEnhancedFullRatespeechtrafficchannelsinthetransmitterandinthereceiverofGSMMobileStations(MS)sandBaseStationSystems(BSS)sduringDiscontinuousTransmission(DTX).Forclarity,thedescriptionisstructuredaccordingtotheblockdiagramsinfigures1and4.Exceptinthecasedescribednext,thisstructureofdistributingthevariousfunctionsbetweensystementitiesisnotmandatoryforimplementation,aslongastheoperationontheairinterfaceandonthespeechdecoderoutputremainsthesame.InthecaseofBSSswherethespeechtranscoderislocatedremotelyintheBaseStationController(BSC),theimplementationoftheinterfacesbetweentheDTXhandlersandtheRadioSubSystem(RSS)asdescribedinthepresentdocumenttogetherwithalltheirflagsismandatory,beingpartoftheA-bisinterfaceasdescribedinGSM08.60[13].TheDTXfunctionsdescribedinthepresentdocumentaremandatoryforimplementationintheGSMMSs.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:"Digitalcellulartelecommunicationssystem(Phase2+);Abbreviationsandacronyms".[2]GSM04.08:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".[3]GSM05.03:"Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding".[4]GSM05.05:"Digitalcellulartelecommunicationssystem(Phase2+);Radiotransmissionandreception".[5]GSM05.08:"Digitalcellulartelecommunicationssystem(Phase2+);Radiosubsystemlinkcontrol".[6]GSM06.51:"Digitalcellulartelecommunicationssystem(Phase2+);EnhancedFullRate(EFR)speechprocessingfunctions;Generaldescription".[7]GSM06.53:"Digitalcellulartelecommunicationssystem(Phase2+);ANSI-CcodefortheGSMEnhancedFullRate(EFR)speechcodec".[8]GSM06.54:"Digitalcellulartelecommunicationssystem(Phase2+);TestvectorsfortheGSMEnhancedFullRate(EFR)speechcodec".[9]GSM06.60:"Digitalcellulartelecommunicationssystem(Phase2+);EnhancedFullRate(EFR)speechtranscoding".SIST EN 300 729 V7.1.1:2003
ETSIETSIEN300729V7.1.1(2000-04)6(GSM06.81version7.1.1Release1998)[10]GSM06.61:"Digitalcellulartelecommunicationssystem(Phase2+);SubstitutionandmutingoflostframeforEnhancedFullRate(EFR)speechtrafficchannels".[11]GSM06.62:"Digitalcellulartelecommunicationssystem(Phase2+);ComfortnoiseaspectsforEnhancedFullRate(EFR)speechtrafficchannels".[12]GSM06.82:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceActivityDetector(VAD)forEnhancedFullRate(EFR)speechtrafficchannels".[13]GSM08.60:"Digitalcellulartelecommunicationssystem(Phase2+);InbandcontrolofremotetranscodersandrateadaptorsforEnhancedFullRate(EFR)andfullratetrafficchannels".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply.acceptedSIDframe:AtrafficframewhichisflaggedwithSID="1"orSID="2"bytheRadioSubsystem.badtrafficframe:AtrafficframeflaggedBFIflag="1"(BadFrameIndication)bytheRadioSubsystem.frame:Timeintervalof20msec.correspondingtothetimesegmentationoftheEnhancedFullRatespeechtranscoder(GSM06.60[9]),alsousedasashorttermforatrafficframe.goodspeechframe:AgoodtrafficframewhichisnotanacceptedSIDframe.goodtrafficframe:AtrafficframeflaggedBFIflag="0"bytheRadioSubsystem.hangoverperiod:Aperiodof7framesaddedattheendofaspeechburstinwhichVADflag="0"andSPflag="1".invalidSIDframe:AnacceptedSIDframewhichwasnotclassified
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