SIST EN 300 972 V7.0.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Discontinuous Transmission (DTX) for half rate speech traffic channels (GSM 06.41 version 7.0.1 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 300 972 V7.0.1:2003 is a European standard that specifies the operation of Discontinuous Transmission (DTX) for half rate speech traffic channels within the Global System for Mobile Communications (GSM) Phase 2+, aligning with Release 1998. Developed by the Slovenski inštitut za standardizacijo (SIST) in cooperation with ETSI, this standard defines the baseband procedures for transmitting and receiving speech at half rate, which is crucial for improving spectral efficiency and reducing interference in GSM networks. The implementation of DTX enables radio transmitters in mobile stations (MS) and base station systems (BSS) to reduce power usage and overall network interference during speech pauses, contributing to more efficient and sustainable cellular communication.
Key Topics
- Discontinuous Transmission (DTX):
- Mechanism that turns off the transmitter during speech pauses to save power and reduce interference.
- Half Rate Speech Traffic Channels:
- Definition of operations for channels that handle speech at half the standard data rate, facilitating increased network capacity.
- Voice Activity Detector (VAD):
- Utilized in the transmit (TX) side to distinguish between speech and silence, directing when DTX should engage.
- Comfort Noise Generation (CNG):
- Ensures the listener perceives natural background noise during silence periods when transmission is off.
- Error Handling:
- Use of bad frame indication (BFI), unreliable frame indication (UFI), and substitution techniques to maintain voice quality despite transmission errors.
- Compatibility and Interfacing:
- Specifies interactions between DTX handlers and Radio Sub-Systems (RSS) in both mobile and base station equipment.
- Mandatory Implementation:
- DTX requirements are required for all GSM mobile stations (MS) and, on the receiver side, all base station systems (BSS).
Applications
The standard has wide practical impact in modern GSM networks, specifically for:
- Mobile Device Manufacturers:
- Ensures consistent energy-saving behavior across devices by mandating DTX implementation for half rate speech channels.
- Network Operators:
- Enables support for more simultaneous calls due to improved spectral efficiency and reduced air interface interference.
- Telecommunications Infrastructure:
- Provides a foundation for integrating advanced speech features, such as voice activity detection and comfort noise, that enhance user experience.
- Power Management:
- Significantly extends mobile battery life during calls with frequent pauses, benefiting end users.
- Interoperability:
- Promotes compatibility between different vendors' equipment within the GSM ecosystem by establishing clear interfaces and frame handling rules.
Related Standards
For comprehensive implementation and system integration within GSM networks, the following standards are also relevant:
- GSM 06.02: Describes half rate speech processing functions.
- GSM 06.06: Provides ANSI-C code for the GSM half rate speech codec.
- GSM 06.07: Specifies test sequences for half rate speech codecs.
- GSM 06.20: Covers half rate speech transcoding.
- GSM 06.21: Details substitution and muting of lost frames.
- GSM 06.22: Specifies comfort noise aspects for half rate channels.
- GSM 06.42: Focuses on voice activity detection.
- GSM 08.61: Defines in-band control of remote transcoders and rate adaptors for half rate traffic channels.
Conclusion
SIST EN 300 972 V7.0.1:2003 is essential for any organization designing, manufacturing, or operating equipment or services for GSM networks. By ensuring efficient management of half rate speech channels and transmission discontinuity, this standard supports enhanced network capacity, better user experience, and robust interoperability across the European telecommunications landscape.
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Frequently Asked Questions
SIST EN 300 972 V7.0.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Discontinuous Transmission (DTX) for half rate speech traffic channels (GSM 06.41 version 7.0.1 Release 1998)". This standard covers: Upgrade from Phase 2+ to Release 1998
Upgrade from Phase 2+ to Release 1998
SIST EN 300 972 V7.0.1:2003 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 300 972 V7.0.1:2003 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 300 972 V7.0.1:2003 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); Half rate speech; Discontinuous Transmission (DTX) for half rate speech traffic channels (GSM 06.41 version 7.0.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 972 Version 7.0.1SIST EN 300 972 V7.0.1:2003en01-december-2003SIST EN 300 972 V7.0.1:2003SLOVENSKI
STANDARD
ETSIEN300972V7.0.1(2000-01)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;DiscontinuousTransmission(DTX)forhalfratespeechtrafficchannels(GSM06.41version7.0.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 972 V7.0.1:2003
ETSIETSIEN300972V7.0.1(2000-01)2(GSM06.41version7.0.1Release1998)ReferenceREN/SMG-110641Q7KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88Internetsecretariat@etsi.frIndividualcopiesofthisETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frImportantnoticeThisETSIdeliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 972 V7.0.1:2003
ETSIETSIEN300972V7.0.1(2000-01)3(GSM06.41version7.0.1Release1998)ContentsIntellectualPropertyRights.4Foreword.41Scope.62References.63Definitions,symbolsandabbreviations.73.1Definitions.73.2Symbols.83.3Abbreviations.84General.84.1GeneralOrganisation.85Transmit(TX)side.95.1GeneralOperation.95.1.1FunctionsoftheTXDTXhandler.95.1.2FunctionsoftheTXradiosubsystem.106Receive(RX)side.126.1Generaloperation.126.1.1FunctionsoftheRXradiosubsystem.126.1.2FunctionsoftheRXDTXhandler.13AnnexA(informative):ChangeRequestHistory.14History.15SIST EN 300 972 V7.0.1:2003
ETSIETSIEN300972V7.0.1(2000-01)4(GSM06.41version7.0.1Release1998)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).The present document is a GSM technical specification version 7 and is part of the 1998 release of the GSM TechnicalSpecifications.Thepresentdocumentispartofaseriescoveringthehalfratespeechtrafficchannelsasdescribedbelow:GSM06.02"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Halfratespeechprocessingfunctions".GSM06.06"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;ANSI-CcodefortheGSMhalfratespeechcodec".GSM06.07"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;TestsequencesfortheGSMhalfratespeechcodec".GSM06.20"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Halfratespeechtranscoding".GSM06.21"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Substitutionandmutingoflostframesforhalfratespeechtrafficchannels".GSM06.22"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Comfortnoiseaspectsforhalfratespeechtrafficchannels".GSM06.41"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;DiscontinuousTransmission(DTX)forhalfratespeechtrafficchannels".GSM06.42"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;VoiceActivityDetector(VAD)forhalfratespeechtrafficchannels".ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesRelease1998ofGSMPhase2+.xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.SIST EN 300 972 V7.0.1:2003
ETSIETSIEN300972V7.0.1(2000-01)5(GSM06.41version7.0.1Release1998)NationaltranspositiondatesDateofadoptionofthisEN:31December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 972 V7.0.1:2003
ETSIETSIEN300972V7.0.1(2000-01)6(GSM06.41version7.0.1Release1998)1ScopeThepresentdocumentgivesadescriptionofthegeneralbasebandoperationofhalfratespeechtrafficchannelsinthetransmitterandinthereceiverofGSMMobileStations(MS)sandBaseStationSystems(BSS)sduringDiscontinuousTransmission(DTX).Forclarity,thedescriptionisstructuredaccordingtotheblockdiagramsinfigures1and4.Exceptinthecasedescribedbelow,thisstructureofdistributingthevariousfunctionsbetweensystementitiesisnotmandatoryforimplementation,aslongastheoperationontheairinterfaceandonthespeechdecoderoutputremainsthesame.InthecaseofBSSswherethespeechtranscoderislocatedremotelyintheBaseStationController(BSC),theimplementationoftheinterfacesbetweentheDTXHandlersandtheRadioSubSystem(RSS)asdescribedinthepresentdocumenttogetherwithalltheirflagsismandatory,beingapartoftheA-bisinterfaceasdescribedinGSM08.61[10].TheDTXfunctionsdescribedinthepresentdocumentaremandatoryforimplementationinallGSMMSs.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]GSM05.05:"Digitalcellulartelecommunicationssystem(Phase2+);Radiotransmissionandreception".[4]GSM05.08:"Digitalcellulartelecommunicationsystem(Phase2+);Radiosubsystemlinkcontrol".[5]GSM06.02:"Digitalcellulartelecommunicationssystem(Phase2+);HalfratespeechPart1:Halfratespeechprocessingfunctions".[6]GSM06.20:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Halfratespeechtranscoding".[7]GSM06.21:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Substitutionandmutingoflostframesforhalfratespeechtrafficchannels".[8]GSM06.22:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Comfortnoiseaspectsforhalfratespeechtrafficchannels".[9]GSM06.42:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;VoiceActivityDetector(VAD)forhalfratespeechtrafficchannels".SIST EN 300 972 V7.0.1:2003
ETSIETSIEN300972V7.0.1(2000-01)7(GSM06.41version7.0.1Release1998)[10]GSM08.61:"Digitalcellulartelecommunicationssystem(Phase2+);Inbandcontrolofremotetranscodersandrateadaptorsforhalfratetrafficchannels".[11]GSM06.06:"Digitalcellulartelecommunicationssystem(Phase2+);HalfratespeechPart7:ANSI-CcodefortheGSMhalfratespeechcodec".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply.acceptedSIDframe:AtrafficframewhichisflaggedwithSID="1"orSID="2"bytheRadioSubsystem.badtrafficframe:AtrafficframeflaggedBFI="1"(BadFrameIndication)orwithUFI="1"(UnreliableFrameIndication)bytheRadioSubsystem.frame:Timeintervalof20mscorrespondingtothetimesegmentationofthehalfratespeechtranscoderdefinedinGSM06.20(ETS300969)[6]),alsousedasashortt
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