SIST EN 300 396-7 V1.2.1:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QDþLQTerrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO); Part 7: Type 2 repeater air interface33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 396-7 Version 1.2.1SIST EN 300 396-7 V1.2.1:2003en01-december-2003SIST EN 300 396-7 V1.2.1:2003SLOVENSKI
STANDARD
ETSIEN300396-7V1.2.1(2000-12)EuropeanStandard(Telecommunicationsseries)TerrestrialTrunkedRadio(TETRA);TechnicalrequirementsforDirectModeOperation(DMO);Part7:Type2repeaterairinterfaceSIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)2ReferenceDEN/TETRA-02007-7KeywordsTETRA,radio,securityETSI650RoutedesLuciolesF-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 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)3ContentsIntellectualPropertyRights.7Foreword.71Scope.82References.83Definitionsandabbreviations.93.1Definitions.93.2Abbreviations.114Overviewofprotocol.124.1General.124.2TheDMchannel.134.3DMcallproceduresforoperationwithatype2DM-REP.144.3.1Constraintsontheframestructure.154.3.2Settingupacall.164.3.2.1Callset-upwithoutpresencecheck.164.3.2.2Callset-upwithpresencecheck.174.3.3Changeoverinacall.184.3.4Pre-emptionofaDMcall.194.3.5Terminatingacall.204.3.6DMshortdatacall.204.3.6.1Unacknowledgedshortdatamessage.204.3.6.2Acknowledgedshortdatamessage.215DM-MSlayer3servicedescriptionforoperationwithatype2DM-REP.226DM-MSlayer3protocolforoperationwithatype2DM-REP.227DM-MSlayer2servicedescriptionforoperationwithatype2DM-REP.228DM-MSlayer2protocolforoperationwithatype2DM-REP.238.1Introduction.238.1.1FunctionsoflowerMAC.238.1.2FunctionsofupperMAC.238.2InterfacebetweenlowerandupperMAC.238.3Basiccapabilitiesofthephysicallayer.238.3.1DM-MScapabilities.238.3.1.1DMonlyanddualmodecapableMSoperation.248.3.1.2DualwatchcapableMSoperation.248.4UsageofDMchannelwithtype2DM-REP.248.4.1DefinitionofDMchannel.258.4.1.1DMchannelarrangement.258.4.1.2DMchannelAoperation.258.4.1.3DMchannelBoperation.268.4.2DMchannelstates.278.4.2.1DMchannelstatedefinitions.278.4.2.2DM-MSchannelsurveillanceprocedures.278.4.2.2.1InitialdeterminationofDMchannelstate.278.4.2.2.2DM-MSchannelsurveillanceinidlemode.288.4.2.2.3DM-MSchannelsurveillanceatcallset-up.288.4.2.3MasterDM-MSchannelsurveillanceproceduresduringacall.298.4.2.4SlaveDM-MSchannelsurveillanceproceduresduringacall.298.4.2.4.1SlaveMSchannelsurveillanceduringcalltransaction.298.4.2.4.2SlaveMSsignalqualitymeasurementduringcalltransaction.298.4.2.4.3SlaveMSchannelsurveillanceduringreservation.308.4.2.5AdditionalmasterDM-MSsurveillanceprocedures.308.4.2.5.1SurveillancebychannelAmasterMS.30SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)48.4.2.5.2SurveillancebychannelBmasterMS.308.4.3DM-MACstates.318.4.3.1DM-MACstatedefinitions.318.4.3.2CriteriaforchangingDM-MACstate.318.4.4DM-MSchannelmonitoringprocedures.318.4.4.1DMchannelduringinitialcallset-upandnewcalltransactionbycurrentmasterMS.318.4.4.2DMchannelduringcallset-upwithpresencecheck.318.4.4.3DMchannelinoccupationduringacircuitmodecall.328.4.4.4DMchannelinreservationduringacircuitmodecall.328.4.4.5DMchannelinoccupationduringanSDScall.328.4.4.6DMchannelusageduringpre-emptionsignalling.328.4.4.7DMchannelusageduringtimingchangerequestsignalling.328.4.5Transmissionoflayer3messagesbyDM-MAC.328.4.5.1TransmissionofC-planemessagesbyDM-MAC.328.4.5.2TransmissionofU-planemessagesbyDM-MAC.338.4.6Transmissionoflayer2messagesgeneratedbyDM-MAC.338.4.7GeneralDM-MACprocedures.338.4.7.1DM-MACrepeattransmissions.338.4.7.2DM-MACframecountdownprocedure.338.4.7.3Useoftimers.338.4.7.4Linearization.348.4.7.5Fragmentation.348.4.7.6Fillbitindication.348.4.7.7Selectionofpseudoaddress.358.4.7.8Slotflagindication.358.4.7.9Requestsbitmap.358.4.7.10DMaspectsofdualwatchoperation.358.4.7.10.1Modelofoperation.358.4.7.10.2Dualwatchsynchronization.358.4.7.10.3Dualwatchprecedencerules.368.4.7.11Airinterfaceencryption.368.4.7.12ChannelAorBoperation.368.4.7.13Sendingshortdataasatransactionwithinacircuitmodecall.368.4.7.14SDStimeremaining.378.4.7.15Timingchangeprocedure.378.4.7.16Timingchangeatchangeoverorpre-emption.378.5MACproceduresfortransferofsignallingmessages.378.5.1FormationofMACPDU.378.5.2Addressing.378.5.3Useofairinterfaceencryption.378.5.4Fragmentationandreconstruction.378.5.5Fillbitadditionanddeletion.378.5.6Transmissionandreceptionofmessagesbylayer2.378.5.7Randomaccessprotocol.388.5.7.1Introduction.388.5.7.2ProceduresformasterDM-MS.388.5.7.2.1Indicatingframesavailableforrequests.388.5.7.2.2Monitoringframesavailableforrequests.388.5.7.2.3Responsetopre-emptionorchangeoverrequest.398.5.7.2.4Responsetotimingchangerequest.398.5.7.3ProceduresforrequestingDM-MS.398.5.7.3.1Preparingforrandomaccess.398.5.7.3.2Firsttransmissionofrequest.398.5.7.3.3Validaccessslots.408.5.7.3.4Waitingforresponse.418.5.7.3.5Subsequenttransmissionofrequest.418.5.7.3.6Abandoningrandomaccessattempt.418.6MACproceduresintrafficmode.419DM-REPlayer2protocolforatype2DM-REP.419.1Introduction.419.1.1FunctionsoflowerMAC.42SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)59.1.2FunctionsofupperMAC.429.2InterfacebetweenlowerandupperMAC.429.3BasiccapabilitiesoftheDM-REPphysicallayer.429.4UsageofDMchannel.439.4.1DM-REPoperation.439.4.1.1Channelstructure.439.4.1.2Channelsynchronization.439.4.2DM-REPstates.449.4.2.1DM-REPstatedefinitions.449.4.2.2DM-REPchannelsurveillanceprocedures.459.4.2.2.1DM-REPchannelsurveillancewhenidleonafreechannel(i.e.instate1).459.4.2.2.2DM-REPchannelsurveillancewhenidleonabusychannel(i.e.instate2).459.4.2.2.3DM-REPchannelsurveillancewhenidleatDM-MScallset-up.469.4.2.2.4DM-REPchannelsurveillancewhenactivewithoneDMchannelfree.469.4.2.3DM-REPchannelsurveillancewhenactiveduringacall.469.4.3CriteriaforchangingDM-REPstate.469.4.4DM-REPchannelmonitoringprocedures.469.4.4.1DMchannelduringcallset-upwithpresencecheck.479.4.4.2DMchannelinoccupationduringacircuitmodecall.479.4.4.3DMchannelinreservationduringacircuitmodecall.479.4.4.4DMchannelinoccupationduringanSDScall.479.4.4.5DMchannelfollowingpre-emptionorchangeoveracceptance.479.4.4.6DMchannelfollowingtimingchangeannouncement.489.4.5DM-REPpresencesignal.489.4.5.1Channelfree.489.4.5.1.1DM-REPidleonafreecarrier(i.e.instate1).489.4.5.1.2DM-REPactivewithoneDMchannelfree.489.4.5.2DMchannelinoccupation.489.4.5.3DMchannelinreservation.499.4.6DM-REPlinearization.499.5DM-REPproceduresforre-transmissionofsignallingmessages.509.5.1Re-transmissionofsignallingmessagesreceivedfromthemasterDM-MS.509.5.1.1Re-transmissionofmasterDM-MSsignallingmessagesreceivedinaDSB.509.5.1.1.1Generalprocedures.509.5.1.1.2Re-transmissionofDM-SETUPorDM-SETUPPRESmessage.509.5.1.1.3Re-transmissionofDM-SDSDATAorDM-SDSUDATAmessage.509.5.1.1.4Re-transmissionofothermessagesinaDSBwhennotusingmulti-slotregeneration.519.5.1.1.5Re-transmissionofothermessagesinaDSBduringtraffictransmissionwithmulti-slotregeneration.519.5.1.2Re-transmissionofmasterDM-MSsignallingmessagesreceivedinaDNB.519.5.1.2.1Calltransactionwithoutmulti-slotregeneration.519.5.1.2.2Calltransactionwithmulti-slotregeneration.519.5.1.3Regenerationofadditionalrepetitionsontheslavelink.519.5.2Re-transmissionofsignallingmessagesreceivedfromaslaveDM-MS.519.5.2.1Generalprocedures.519.5.2.2Re-transmissionofresponsemessagesfromaslaveDM-MS.519.5.2.3Re-transmissionofrandomaccessrequest.529.5.3DM-REPsignallingmechanisms.529.5.3.1Framecountdownprocedure.529.5.3.2Fillbitadditionanddeletion.529.5.3.3NullPDU.529.5.3.4Airinterfaceencryption.539.5.3.5Timingchangeprocedure.539.5.3.6RandomaccessproceduresforDM-REP.539.6DM-REPproceduresintrafficmode.5310PDUdescriptions.5311RadioaspectsofDM-MSforoperationwithatype2DM-REP.5511.1Introduction.5511.2Modulation.5511.3Radiotransmissionandreception.55SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)611.3.1Introduction.5511.3.2Frequencybandsandchannelarrangement.5511.3.3Referencetestplanes.5511.3.4Transmittercharacteristics.5511.3.5Receivercharacteristics.5511.3.6Transmitter/receiverperformance.5511.4Radiosub-systemsynchronization.5511.4.1Introduction.5511.4.2DefinitionsandgeneralrequirementsforsynchronizationofDM-MSs.5611.4.3Timebasecounters.5711.4.4RequirementsforthefrequencyreferencesourceofDMmobiles.5711.4.5RequirementsforthesynchronizationofaslaveDMmobile.5711.4.6SynchronizationrequirementsforamasterMSoperatingonchannelB.5711.5Channelcodingandscrambling.5711.6ChannelmultiplexingforDMoperationthroughatype2DM-REP.5711.7Radiosub-systemlinkcontrol.5812Radioaspectsofatype2DM-REP.5812.1Introduction.5812.2Modulation.5812.3Radiotransmissionandreception.5812.3.1Introduction.5812.3.2Frequencybandsandchannelarrangement.5812.3.3Referencetestplanes.5812.3.4Transmittercharacteristics.5812.3.4.1Outputpower.5812.3.4.2Powerclasses.5812.3.4.3Unwantedconductedemissions.5912.3.4.3.1Definitions.5912.3.4.3.2Unwantedemissionsclosetothecarrier.5912.3.4.3.3Unwantedemissionsfarfromthecarrier.5912.3.4.3.3.1Discretespurious.5912.3.4.3.3.2Widebandnoise.5912.3.4.3.4UnwantedemissionsduringtheLinearizationCHannel(LCH).5912.3.4.3.5Unwantedemissionsinthenon-transmitstate.5912.3.4.4Unwantedradiatedemissions.5912.3.4.5Radiofrequencytolerance.5912.3.4.6RFoutputpowertimemask.5912.3.4.7Transmitterintermodulationattenuation.5912.3.5Receivercharacteristics.6012.3.6Transmitter/receiverperformance.6012.4Radiosub-systemsynchronization.6012.4.1Introduction.6012.4.2Definitionsandgeneralrequirementsforsynchronization.6012.4.3Timebasecounters.6012.4.4Requirementsforthefrequencyreferencesourceofatype2DM-REP.6012.4.5Requirementsforthesynchronizationofatype2DM-REP.6012.5Channelcodingandscrambling.6112.6Channelmultiplexingforatype2DM-REP.6112.7Radiosub-systemlinkcontrol.61AnnexA(normative):TimersandconstantsinDM-MSandDM-REP.62History.63SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)7IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSIProjectTerrestrialTrunkedRadio(TETRA).ThepresentdocumenthadbeensubmittedtoPublicEnquiryasETS300396-7.DuringtheprocessingforVoteitwasconvertedintoanEN.Thepresentdocumentispart7ofamulti-partdeliverablecoveringtheTechnicalrequirementsforDirectModeOperation(DMO),asidentifiedbelow:Part1:"Generalnetworkdesign";Part2:"Radioaspects";Part3:"MobileStationtoMobileStation(MS-MS)AirInterface(AI)protocol";Part4:"Type1repeaterairinterface";Part5:"Gatewayairinterface";Part6:"Security";Part7:"Type2repeaterairinterface";Part8:"ProtocolImplementationConformanceStatement(PICS)proformaspecification".NationaltranspositiondatesDateofadoptionofthisEN:8December2000DateoflatestannouncementofthisEN(doa):31March2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2001DateofwithdrawalofanyconflictingNationalStandard(dow):30September2001SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)81ScopeThepresentdocumentdefinestheTerrestrialTrunkedRadio(TETRA)DirectModeOperation(DMO).Itspecifiesthebasicairinterface,theinter-workingbetweenDirectMode(DM)groupsviarepeaters,andinter-workingwiththeTETRAVoiceplusData(V+D)systemviagateways.ItalsospecifiesthesecurityaspectsinTETRADMO,andtheintrinsicservicesthataresupportedinadditiontothebasicbearerandteleservices.ThispartappliestotheTETRADirectModeRepeater(DM-REP)airinterfaceandcontainsthespecifications,whereapplicable,ofthephysical,datalinkandnetworklayersaccordingtotheISOmodel.ThespecificationscontainedhereinapplytoaDM-REPasastand-aloneunitsupportingtwocallsontheairinterface(type2DM-REP).TheyalsocovertheoperationofaDirectModeMobileStation(DM-MS)withatype2DM-REP.NOTE1:ThespecificationsforaDirectModeRepeater/Gateway(DM-REP/GATE)combinedimplementationareprovidedinETS300396-5[5],togetherwiththespecificationsforaDirectModeGateway(DM-GATE).NOTE2:ThespecificationsforaDM-REPasastand-aloneunitsupportingasinglecallontheairinterface(type1DM-REP)areprovidedinEN300396-4[4].TheprotocolforaDM-MSoperatingwithatype2DM-REPisspecifiedinclauses5through8,10and11.Muchofthisprotocolisdefinedintheformofa"deltadocument"relativetothespecificationsprovidedinETS300396-2[2]andETS300396-3[3]fordirectMS-MSoperation,andEN300396-4[4]fortype1DM-REPoperation.Theseclausesdefinewheretheprotocolinparts2,3and4applieswithoutchange,orwhereitapplieswiththespecifiedamendments,replacementsoradditions.Wherenoreferencetoparts2,3or4exists,thesubclauseshouldberegardedasindependent.TheprotocolfortheDM-REPisspecifiedinclauses9and12.Thenormativeannexmainlyspecifiestheparametervaluesusedintheprotocol.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIETS300396-1:"TerrestrialTrunkedRadio(TETRA);TechnicalrequirementsforDirectModeOperation(DMO);Part1:Generalnetworkdesign".[2]ETSIETS300396-2:"TerrestrialTrunkedRadio(TETRA);TechnicalrequirementsforDirectModeOperation(DMO);Part2:Radioaspects".[3]ETSIETS300396-3(1998):"TerrestrialTrunkedRadio(TETRA);TechnicalrequirementsforDirectModeOperation(DMO);Part3:MobileStationtoMobileStation(MS-MS)AirInterface(AI)protocol".[4]ETSIEN300396-4:"TerrestrialTrunkedRadio(TETRA);TechnicalrequirementsforDirectModeOperation(DMO);Part4:Type1repeaterairinterface".[5]ETSIETS300396-5:"TerrestrialTrunkedRadio(TETRA);TechnicalrequirementsforDirectModeOperation(DMO);Part5:Gatewayairinterface".[6]ETSIETS300396-6:"TerrestrialTrunkedRadio(TETRA);DirectModeOperation(DMO);Part6:Security".SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)9[7]ETSIEN300392-2:"TerrestrialTrunkedRadio(TETRA);VoiceplusData(V+D);Part2:AirInterface(AI)".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:BitErrorRatio(BER):ratioofthebitswronglyreceivedtoallbitsreceivedinagivenlogicalchannelcall:therearetwotypesofcall,individualcallorgroupcall.AnindividualcallisacompletesequenceofrelatedcalltransactionsbetweentwoDM-MSs.Therearealwaystwoparticipantsinanindividualcall.AgroupcallisacompletesequenceofrelatedcalltransactionsinvolvingtwoormoreDM-MSs.Thenumberofparticipantsinagroupcallisnotfixed,butisatleasttwo.Participantsmayjoin(lateentry)andleaveanongoinggroupcallcalltransaction:allofthefunctionsassociatedwithacompleteunidirectionaltransmissionofinformationduringacall.Acallismadeupofoneormorecalltransactions.Inasimplexcallthesecalltransactionsaresequentialcalleduserapplication:userapplicationwhichreceivesanincomingcallcallinguserapplication:userapplicationwhichinitiatesanoutgoingcallchangeover:withinacall,theprocessofeffectingatransferofthemasterrole(andhencetransmittingMS)attheendofonecalltransactionsothatanothercancommenceDirectMode(DM):modeofsimplexoperationwheremobilesubscriberradiounitsmaycommunicateusingradiofrequencieswhichmaybemonitoredby,butwhichareoutsidethecontrolof,theTETRAV+Dnetwork.DMisperformedwithoutinterventionofanybasestationDirectModeCallControl(DMCC):layer3entityresponsibleforsettingupandmaintainingacallinDMODMchannel:specificgroupingoftimeslotsintheDMmultiplexstructurerelatedtoaparticularDMRFcarrieri.e.DMfrequency(ortoapairofduplex-spacedRFcarriersforoperationwithatype1Bortype2DM-REPoratype1BDM-REP/GATE).Thegroupingmaynotalwaysbefixed,butinDMOwhenoperatinginfrequencyefficientmodeasanexample,therearetwoDMchannels,identifiedbythelettersAandBDirectModeMobileStation(DM-MS):physicalgroupingthatcontainsallofthemobileequipmentthatisusedtoobtainTETRADMservices.ADM-MSmayhaveoneofthreeroles:-master:iftheDM-MSiseitheractiveinacalltransactiontransmittingtrafficorcontroldata,orisreservingthechannelbymeansofchannelreservationsignalling;-slave:iftheDM-MSisreceivingtrafficand/orsignallinginacall;or-idle:iftheDM-MSisnotinacallDM-REPpresencesignal:messagetransmittedbyaDM-REPinordertoindicateitspresenceonanRFcarrierDualWatchMobileStation(DW-MS):MSthatiscapableofbothTETRADMOandTETRAV+Doperation.TheMSiscapableofperiodicallymonitoringtheV+DcontrolchannelwhileinaDMcall,aDMRFcarrierwhileinaV+Dcalland,whenidle,itperiodicallymonitorsboththeDMRFcarrierandtheV+DcontrolchannelDirectModegateway:devicethatprovidesgatewayconnectivitybetweenDM-MS(s)andtheTETRAV+Dnetwork.ThegatewayprovidestheinterfacebetweenTETRADMOandTETRAV+Dmode.Agatewaymayprovideonlythegatewayfunction(DM-GATE)ormayprovidethefunctionsofbothaDMrepeaterandaDMgatewayduringacall(DM-REP/GATE)SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)10DirectModeREPeater(DM-REP):devicethatoperatesinTETRADMOandprovidesarepeaterfunctiontoenabletwoormoreDM-MSstoextendtheircoveragerange.Itmaybeeitheratype1DM-REP,capableofsupportingonlyasinglecallontheairinterface,oratype2DM-REP,capableofsupportingtwocallsontheairinterface.Atype1DM-REPmayoperateoneitherasingleRFcarrier(type1ADM-REP)orapairofduplex-spacedRFcarriers(type1BDM-REP).Atype2DM-REPoperatesonapairofduplex-spacedRFcarriersframenumber:counterindicatingthetimingofframeswithinaDMOmultiframefrequencyefficientmode:modeofoperationwheretwoindependentDMcommunicationsaresupportedonasingleRFcarrier(orpairofduplex-spacedRFcarriersforoperationwithatype2DM-REP).InfrequencyefficientmodethetwoDMchannelsareidentifiedaschannelAandchannelBlogicalchannel:generictermforanydistinctdatapath.Logicalchannelsareconsideredtooperatebetweenlogicalendpointsmasterlink:communicationlinkusedfortransmissionsbetweenmasterDM-MSandDM-REPMediumAccessControl(MAC)block:unitofinformationtransferredbetweentheupperMACandlowerMACforaparticularlogicalchannel(e.g.SCH/ForSTCH).ThelowerMACperformschannelcodingforinsertionintotheappropriatephysicalslotorhalfslotMessageErasureRate(MER):ratioofthemessagesdetectedaswrongbythereceivertoallmessagesreceivedinagivenlogicalchannelnormalmode:modeofoperationwhereonlyoneDMcommunicationissupportedonanRFcarrier(orpairofduplex-spacedRFcarriersforoperationwithatype1BDM-REPortype1BDM-REP/GATE)presencesignal:messagetransmittedbyaDM-REPoragatewayinordertoindicateitspresenceonanRFcarrierQuartersymbolNumber(QN):timingofquartersymbolduration125/9µswithinaburstrecentuser:DM-MSthatwasmasterofthecalltransactionimmediatelypriortothecurrentmaster'scalltransactioninacallrecentuserpriority:servicewhichgivestherecentuserapreferredaccesstorequesttransmissionwhenthecurrentmasterisceasingitscalltransactioninagroupcall.Thisserviceiscontrolledbythecurrentmastersimplex:modeofworkinginwhichinformationcanbetransferredinbothdirectionsbutnotatthesametimeslavelink:communicationlinkusedfortransmissionsbetweentheDM-REPandslaveoridleDM-MSssurveillance:processofdeterminingthecurrentstateoftheDMRFcarrierwheninidlemodetimebase:devicewhichdeterminesthetimingstateofsignalstransmittedbyaDM-MStimeslotnumber:counterindicatingthetimingoftimeslotswithinaDMOframetype1call:callusingtheprotocoldefinedinEN300396-4[4].Therearetwovarietiesoftype1call:-type1Acall:whichisacallthroughatype1ADM-REP;-type1Bcall:whichisacallusingtheprotocolforoperationwithatype1BDM-REP.ADM-MSmaymakeatype1Bcallthroughatype1BDM-REP.Itmayalsomakeatype1Bcallthroughatype2DM-REPifpermittedbytheDM-REPtype1DM-REP:DMrepeaterthatsupportsasinglecallontheairinterface.Therearetwovarietiesoftype1DM-REP:-type1ADM-REP:whichoperatesonasingleRFcarrier;-type1BDM-REP:whichoperatesonapairofduplex-spacedRFcarriers,oneusedasthe"uplink"fromDM-MSstotheDM-REPandtheotherusedasthe"downlink"fromtheDM-REPtoDM-MSs.Theprotocolforoperationwithatype1DM-REP(eitheratype1Aoratype1BDM-REP)isbasedontheprotocolfornormalmodeinETS300396-3[3]SIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)11type2call:callusingtheprotocoldefinedinthepresentdocument.ADM-MSmaymakeatype2callonlythroughatype2DM-REPtype2DM-REP:DMrepeaterthatiscapableofsupportingtwosimultaneoustype2callsontheairinterface.Atype2DM-REPoperatesonapairofduplex-spacedRFcarriers,oneusedasthe"uplink"fromDM-MSstotheDM-REPandtheotherusedasthe"downlink"fromtheDM-REPtoDM-MSs.Theprotocolfortype2callsthroughatype2DM-REPisbasedontheprotocolforfrequencyefficientmodeinETS300396-3[3].(Atype2DM-REPmayalsooptionallyoffertype1BcallsusingtheprotocoldefinedinEN300396-4[4])V+Doperation:modeofoperationwhereMSsmaycommunicateviatheTETRAV+DairinterfacewhichiscontrolledbytheTETRASwitchingandManagementInfrastructure(SwMI)3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:BERBitErrorRatioDLBDirectModeLinearizationBurstDLLDataLinkLayerDMDirectModeDM-GATEDirectModeGatewayDM-MSDirectModeMobileStationDM-REPDirectModeRepeaterDM-REP/GATEDirectModeRepeater/GatewayDMCCDirectModeCallControlentityDMODirectModeOperationDNBDirectModeNormalBurstDO-MSDirectModeOnlyMobileStationDSBDirectModeSynchronizationBurstDU-MSDualMode(V+D/DirectMode)switchableMobileStationDW-MSDualWatchMobileStationFNFrameNumberLCHLinearizationChannelMACMediumAccessControlMCCHMainControlChannelMERMessageErasureRatemodmodulo(baseforcounting)PDUProtocolDataUnitPLPhysicalLayerQNQuartersymbolNumberRFRadioFrequencySCCHSecondaryControlChannelSCHSignallingChannelSDSShortDataServiceSDUServiceDataUnitSTCHStealingChannelSwMISwitchingandManagementInfrastructureTCHTrafficChannelTNTimeslotNumberV+DVoiceplusDataSIST EN 300 396-7 V1.2.1:2003

ETSIETSIEN300396-7V1.2.1(2000-12)124Overviewofprotocol4.1GeneralTETRADMOusingaDMrepeater(DM-REP)offersthepossibilitytosupportDMcommunicationsoveranenhancedcoverageareafromthattypicallyachievedindirectMS-MSoperation.ADM-REPre-transmitsinformationreceivedfromoneDM-MStootherDM-MS(s)overtheDMairinterface.Itnormallyperformsde-encodingandre-encodingoperationsontheDM-MStransmissionbitspriortoregenerationinordertoimproveBERperformance.TheDM-REPmayoptionallygenerateapresencesignal.Thepurposeofth
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