SIST EN 301 705 V7.1.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Substitution and muting of lost frames for Adaptive Multi Rate (AMR) speech traffic channels (GSM 06.91 version 7.1.1 Release 1998)
General Information
- Abstract
Adaptive Multi- Rate (AMR) Sustitution and muting
- 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 301 705 V7.1.1:2003 is a Slovenian standard that aligns with the European Norm EN 301 705, specifying procedures for the substitution and muting of lost frames in Adaptive Multi-Rate (AMR) speech traffic channels within the GSM digital cellular telecommunications system (Phase 2+). This standard ensures that whenever lost speech or Silence Descriptor (SID) frames are detected by radio subsystems, the receiving equipment applies defined substitution and muting techniques. This is vital for maintaining speech quality and user experience in GSM mobile networks, especially where radio link losses can degrade the clarity of voice communications.
Key Topics
- Lost Frame Handling: Addresses how GSM networks substitute or mute lost or corrupted AMR speech frames to minimize the auditory impact on users.
- AMR Speech Traffic Channels: Focuses on mechanisms for both active speech and periods of silence (comfort noise), ensuring robust AMR audio quality.
- Discontinuous Transmission (DTX): Outlines methods for handling frame loss during periods when the transmitter intentionally ceases transmission to save bandwidth.
- Error Detection and Indications: Describes the flags and indicators (e.g., Bad Frame Indication - BFI) raised by the radio subsystem to trigger error concealment.
- State Machine Approaches: Illustrates procedures built on state machines to progressively handle frame loss, including escalating attenuation and muting strategies as losses persist.
- Mandatory Implementation: The procedures outlined are required for all GSM Base Station Systems (BSS) and Mobile Stations (MS) supporting AMR speech traffic channels.
Applications
The practical value of SIST EN 301 705 V7.1.1:2003 lies in its direct impact on mobile telecommunication technology:
- Mobile Voice Services: Enhances the reliability and quality of voice calls, helping minimize noise and artifacts when temporary radio link failures occur.
- Network Equipment Manufacturing: Essential for manufacturers of GSM-compliant base stations and mobile stations, ensuring interoperability and consistent voice quality across devices and networks.
- Telecom Network Operations: Enables network operators to deliver robust voice services, reducing customer complaints related to dropped or noisy calls caused by intermittent data loss.
- Codec and Speech Processing Solutions: Informs the design of speech codecs and error concealment units to manage speech degradation dynamically.
- Regulatory Compliance: Assures adherence to European and Slovenian telecommunications standards, facilitating product placement in regulated markets.
Related Standards
This standard references and works alongside several important GSM standards, including:
- GSM 05.03: Digital cellular telecommunications system - Channel coding, essential for understanding data integrity and error management.
- GSM 06.90: AMR speech transcoding, which specifies speech codec requirements for AMR.
- GSM 06.93: Discontinuous transmission (DTX) for AMR traffic channels, addressing efficient radio resource usage.
- GSM 08.60 / 08.61: In-band control for remote transcoders and rate adaptors, relevant for both full and half rate channels.
Adopting SIST EN 301 705 V7.1.1:2003 ensures GSM systems are equipped to manage speech frame loss with state-of-the-art substitution and muting techniques, supporting excellent speech quality and user satisfaction in mobile communications.
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Frequently Asked Questions
SIST EN 301 705 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); Substitution and muting of lost frames for Adaptive Multi Rate (AMR) speech traffic channels (GSM 06.91 version 7.1.1 Release 1998)". This standard covers: Adaptive Multi- Rate (AMR) Sustitution and muting
Adaptive Multi- Rate (AMR) Sustitution and muting
SIST EN 301 705 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 301 705 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 301 705 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); Substitution and muting of lost frames for Adaptive Multi Rate (AMR) speech traffic channels (GSM 06.91 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 301 705 Version 7.1.1SIST EN 301 705 V7.1.1:2003en01-december-2003SIST EN 301 705 V7.1.1:2003SLOVENSKI
STANDARD
ETSIEN301705V7.1.1(2000-04)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);SubstitutionandmutingoflostframesforAdaptiveMultiRate(AMR)speechtrafficchannels(GSM06.91version7.1.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 301 705 V7.1.1:2003
ETSIETSIEN301705V7.1.1(2000-04)2(GSM06.91version7.1.1Release1998)ReferenceREN/SMG-110691Q7R1KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM),AMRETSI650RoutedesLuciolesF-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 301 705 V7.1.1:2003
ETSIETSIEN301705V7.1.1(2000-04)3(GSM06.91version7.1.1Release1998)ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitionsandabbreviations.53.1Definitions.53.2Abbreviations.64General.65Requirements.65.1Errordetection.65.2Lostspeechframes.65.3FirstlostSIDframe.65.4SubsequentlostSIDframes.76ExampleECU/BFHSolution1.76.1StateMachine.76.2AssumedActiveSpeechFrameErrorConcealmentUnitActions.86.2.1BFI=0,prevBFI=0,State=0.86.2.2BFI=0,prevBFI=1,State=0or5.86.2.3BFI=1,prevBFI=0or1,State=1.6.96.2.3.1LTP-lagupdate.96.2.3.2Innovationsequence.96.3AssumedNon-ActiveSpeechSignalErrorConcealmentUnitActions.106.3.1General.106.3.2Detectors.106.3.2.1Backgrounddetector.106.3.2.2Voicingdetector.106.3.3BackgroundECUActions.106.4SubstitutionandmutingoflostSIDframes.107ExampleECU/BFHSolution2.117.1StateMachine.117.2Substitutionandmutingoflostspeechframes.117.2.1BFI=0,prevBFI=0,State=0.117.2.2BFI=0,prevBFI=1,State=0or5.117.2.3BFI=1,prevBFI=0or1,State=1.6.127.2.3.1LTP-lagupdate.127.2.4Innovationsequence.127.3SubstitutionandmutingoflostSIDframes.12AnnexA(informative):Documentchangehistory.13History.14SIST EN 301 705 V7.1.1:2003
ETSIETSIEN301705V7.1.1(2000-04)4(GSM06.91version7.1.1Release1998)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).ThepresentdocumentintroducestheAdaptiveMulti-Rate(AMR)speechtrafficchannelswithinthedigitalcellulartelecommunicationssystem.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 301 705 V7.1.1:2003
ETSIETSIEN301705V7.1.1(2000-04)5(GSM06.91version7.1.1Release1998)1ScopeThepresentdocumentdefinesaframesubstitutionandmutingprocedurewhichshallbeusedbytheReceive(RX)DiscontinuousTransmission(DTX)handlerwhenoneormorelostspeechorSilenceDescriptor(SID)framesarereceivedfromtheRadioSubSystem(RSS).TherequirementsofthepresentdocumentaremandatoryforimplementationinallGSMBaseStationSystems(BSS)sandMobileStations(MS)scapableofsupportingtheAMRspeechtrafficchannel.ItisnotmandatorytofollowthebitexactimplementationoutlinedinthepresentdocumentandthecorrespondingCsourcecode.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.• ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM05.03:"Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding".[2]GSM06.90:"Digitalcellulartelecommunicationssystem(Phase2+);AMRspeechtranscoding".[3]GSM06.93:"Digitalcellulartelecommunicationssystem(Phase2+);Discontinuoustransmission(DTX)forAdaptiveMultiRate(AMR)speechtrafficchannels".[4]GSM08.60:"Digitalcellulartelecommunicationssystem(Phase2+);InbandcontrolofremotetranscodersandrateadaptorsforAMR,EnhancedFullRate(EFR)andFullRatetrafficchannels".[5]GSM08.61:"Digitalcellulartelecommunicationssystem(Phase2+);InbandcontrolofremotetranscodersandrateadaptorsforHalfRatetrafficchannels".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply.N-pointmedianoperation:ConsistsofsortingtheNelementsbelongingtothesetforwhichthemedianoperationistobeperformedinanascendingorderaccordingtotheirvalues,andselectingthe(int(N/2)+1)-thelargestvalueofthesortedsetasthemedianvalue.FurtherdefinitionsoftermsusedinthepresentdocumentcanbefoundinGSM06.90[2],GSM06.93[3],GSM05.03[1]andGSM08.60[4].SIST EN 301 705 V7.1.1:2003
ETSIETSIEN301705V7.1.1(2000-04)6(GSM06.91version7.1.1Release1998)3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:BFIBadFrameIndicationfromRadioSubSystemBSI_AbisBadSub-blockIndicationobtainedfromA-bisCRCchecksprevBFIBadFrameIndicationofpreviousframePDFIPotentiallyDegradedFrameIndicationfromRSSRSSRadioSubSystemRXReceiveDTXDiscontinuousTransmissionSIDSIlenceDescriptorframe(Backgrounddescriptor)CRCCyclicRedundancyCheckCCUChannelCodingUnitECUErrorConcealmentUnitBFHBadFrameHandlingmedianNN-pointmedianoperationTRAUTranscodingRateAdaptationUnit4GeneralThepurposeofframesubstitutionistoconcealtheeffectoflostframes.Thepurposeofmutingtheoutputinthecaseofseverallostframesistoindicatethebreakdownofthechanneltotheuserandtoavoidgeneratingpossibleannoyingsoundsasaresultfr
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