IEEE_DSRC_Stds_Tutorial_03-10-02.ppt

,5.9GHzDEDICATEDSHORTRANGECOMMUNICATION(DSRC)STANDARDSDEVELOPMENTUPDATE,5.9GHzDSRCCONCEPT,5.9GHzDSRC(DedicatedShortRangeCommunications)isashorttomediumrangecommunicationsservicethatsupportsbothPublicSafetyandPrivateoperationsinroadsidetovehicleandvehicletovehiclecommunicationenvironments.DSRCismeanttobeacomplementtocellularcommunicationsbyprovidingveryhighdatatransferratesincircumstanceswhereminimizinglatencyinthecommunicationlinkandisolatingrelativelysmallcommunicationzonesareimportant.,ASTM5.9GHzDSRCSTANDARDSWRITINGGROUPPARTICIPATION,3-MAASHTOACUNIAAMTECHARINCARMSTRONGCOUNSULTINGATHEROSCALTRANSDIAMLER-CHRYSLERDENSOGMGTRIHIGHWAYELECTRONICSHITACHIIDMICROIMECINTERSILITS-AJHU/APLKINGCOUNTYMETROTRANSIT,MARKIVMiCOMSpaMICHIGANSTATEDOTMITRETEKMOTOROLANISSANN.Y.THRUWAYAUTHORITYOKIELECTRICPATHRAYTHEONSIRITSUMITOMOELECTRICTECHNOCOMTOSHIBATRANSCOREVISTEONWASHINGTONSTATEDOTWi-LAN,ASTM5.9GHzDSRCSTANDARDSDEVELOPMENTACTIVITY,MEETINGSSINCEREPORTANDORDEROctober1999December1999February2000March2000May2000June2000July2000September2000October2000November2000December2000January2001March2001April2001May2001,MEETINGSSINCEREPORTANDORDERJune2001July2001August2001*October2001December2001January2001February2002MEETINGSCURRENTLYSCHEDULEDMarch2002May2002June2002,*-TechnologySelectionMeeting,5.9GHzDSRCTECHNOLOGYSELECTION,TheinitialselectionbetweentheMotorolaentryandtheOFDMforumentrywasmadebytheASTME17.51DSRCStandardsWritingGrouponAugust24,2001.THEWINNERwastheOFDMforumentry-IEEE802.11a/RAPhysicalLayerandtheIEEE802.11MediumAccessControl(MAC)Layer.(RARoadAccess)ThewritinggroupselectionwasconfirmedbyletterballotvoteoftheLargerASTME17.51subcommitteeinOctober2001.TheASTMDSRCSTDXXXX*willbeamodifiedversionofIEEE802.11awith10MHzwidechannelsinsteadof20MHzchannelsandhalfthedatarate.ItwillincludetheIEEE802.11MediumAccessControl(MAC)Layerwithnoanticipatedchanges.,*-ASTMStandardnumbersareassignedonlywhencomplete,CURRENT5.9GHzDSRCARCHITECTURECONFIGURATION,Layer2LogicalLinkControl/(LLC)IEEE802.2,ResourceManagerApplication/ISO?/IEEE?,Layer1/2PhysicalLayer(PHY)w/MAC/LLCREFsASTMXXXX,Layers3-7ApplicationLayerIEEEXXXX,CHANNELMANAGERSystemManagementEntity(SME)ASTMYYYY,Layer2MediumAccessControl(MAC)IEEE802.11,-EstablishedStandardsandproceduresthatarereferencedasnecessary,-Standardsthatmustbemodifiedorcompleted,-Standardsthatmustbewritten,COREDSRCARCHITECTURE,OTHERNETWORKINTERFACEEXISTINGSTANDARDS,Layer1PhysicalLayer/(PHY)IEEE802.11a,ResourceManagerApplication/Layers3-7IEEE1455,DSRCCAPABILITIES,SPECTRUMUSEDDATARATECOVERAGEALLOCATIONSTATUSINTERFERENCEPOTENTIALMAXIMUMRANGECHANNELCAPACITYPOWER(Downlink)POWER(Uplink),12MHz(909.75to921.75MHz)0.5MbpsLargedistancesbetweencommunicationzonesNoprotectionMany900MHzPhones,ManyRailCarAEIReaders,ManySpreadSpectrumDevices,WindProfileRadars300ft(atrequired-30dBmsensitivity)1to2channelsNominallylessthan40dBm(10W)Nominallylessthan6dBm(4mW),75MHz6Mbps-27MbpsOverlappingcommunicationzonesneededandallowedPrimaryStatus(highprotection)SparselylocatedMilitaryRadars,VerySparselylocatedSatelliteUplinks1000m(3000ft)7channelsNominallylessthan33dBm(2W)*Nominallylessthan33dBm(2W)*,ITSRADIOSERVICEistheFCCPart90designationforthe915MHzand5.9GHzDSRCspectrum*Note-Asaspecialcaseupto44.77dBm(30W)maybeuseforqualifiedpublicsafetyapplications.,902-928MHzBand,PARAMETERS,5850-5925MHzBand,(inthedesignatedITSRADIOSERVICEbands),5.9GHzDSRCBASICOPERATINGFACTORS,PUBLICSAFETYandPRIVATEAPPLICATIONSsharethebandINTEROPERABILITYLICENSEDOPERATIONPUBLICSAFETYINSTALLATIONPRIORITYNON-MUTUALEXCLUSIVITYFORPRIVATEINSTALLATIONSLIMITEDRANGEFORPRIVATEOPERATIONSFREQUENCYCOORDINATORUSEDTOASSIGNLICENSES,CURRENT5.9GHzDSRCSTANDARDWRITINGGROUPACTIVITIES,DevelopingusagerulesandlicensingprocedurerecommendationsfortheFCCExpecttosubmitFCCrulerecommendationsinAprilandJune2002DevelopingtheFinaldraftofthePhysicalandMACLayerStandardsExpectedL1/L2standardcompletioninJune2002,NORTHAMERICAN5.9GHzDSRCOPERATIONALCONCEPT/BANDPLAN,5.9GHzDSRCOPERATIONALCONCEPTINTRODUCTION,5.9GHzDSRC(DedicatedShortRangeCommunications)isashorttomediumrangecommunicationsservicethatsupportsbothPublicSafetyandPrivateoperationsinroadsidetovehicleandvehicletovehiclecommunicationenvironments.DSRCismeanttobeacomplementtocellularcommunicationsbyprovidingveryhighdatatransferratesincircumstanceswhereminimizinglatencyinthecommunicationlinkandisolatingrelativelysmallcommunicationzonesareimportant.ThisbriefingoutlinesanapproachtousingtheselectedDSRCtechnologyinawaythatmaximizestherealizationoftheuserrequirements.Thetopicslistedbelowarediscussedinthefollowingchartsandwereusedinthedevelopmentoftheconceptofoperation:A.ApplicationsB.UserRequirementsExcerptsC.TechnologyCharacteristicsD.ChannelFrequencyAssignmentsE.BasicConcepts,DSRCAPPLICATIONSPUBLICSAFETYandPRIVATE,APPROACHINGEMERGENCYVEHICLE(WARNING)ASSISTANT(3)EMERGENCYVEHICLESIGNALPREEMPTIONROADCONDITIONWARNINGLOWBRIDGEWARNINGWORKZONEWARNINGIMMINENTCOLLISIONWARNING(D)CURVESPEEDASSISTANCEROLLOVERWARNING(1)INFRASTRUCTUREBASEDSTOPLIGHTASSISTANT(2)INTERSECTIONCOLLISIONWARNING/AVOIDANCE(4)HIGHWAY/RAILRAILROADCOLLISIONAVOIDANCE(10)COOPERATIVECOLLISIONWARNINGV-V(5)GREENLIGHT-OPTIMALSPEEDADVISORY(8)COOPERATIVEVEHICLESYSTEMPLATOONING(9)COOPERATIVEADAPTIVECRUISECONTROLACC(11)VEHICLEBASEDPROBEDATACOLLECTION(B)INFRASTRUCTUREBASEDPROBEDATACOLLECTIONINFRASTRUCTUREBASEDTRAFFICMANAGEMENTDATACOLLECTEDfromPROBES(7)TOLLCOLLECTIONTRAFFICINFORMATION(C)TRANSITVEHICLEDATATRANSFER(gate)TRANSITVEHICLESIGNALPRIORITYEMERGENCYVEHICLEVIDEORELAYMAINLINESCREENINGBORDERCLEARANCEON-BOARDSAFETYDATATRANSFERVEHICLESAFETYINSPECTIONDRIVERSDAILYLOG,ACCESSCONTROLDRIVE-THRUPAYMENTPARKINGLOTPAYMENTDATATRANSFER/INFOFUELING(A)ATISDATADIAGNOSTICDATAREPAIR-SERVICERECORDVEHICLECOMPUTERPROGRAMUPDATESMAPandMUSICDATAUPDATESVIDEOUPLOADSDATATRANSFER/CVO/TRUCKSTOPENHANCEDROUTEPLANNINGandGUIDANCE(6)RENTALCARPROCESSINGUNIQUECVOFLEETMANAGEMENTDATATRANSFER/TRANSITVEHICLE(yard)TRANSITVEHICLEREFUELINGMANAGEMENTLOCOMOTIVEFUELMONITORINGDATATRANSFER/LOCOMOTIVE,PRIVATE,PUBLICSAFETY,ATIS-AdvancedTravelerInformationSystemsCVO-CommercialVehicleOperationsEV-EmergencyVehiclesIDB-ITSDataBusTHRUThroughV-VVehicletoVehicle(#)ApplicationsSubmittedbyGM/Ford/Chrysler(A-Z)ApplicationsSubmittedbyDaimler-Chrysler,DSRCAPPLICATIONSbyCOMMUNICATIONCATEGORIES,ACCESSCONTROLTOLLCOLLECTIONDATATRANSFER/INFOFUELING(A)TRAFFICINFORMATION(C)DRIVE-THRUPAYMENTPARKINGLOTPAYMENTINFRASTRUCTUREBASEDPROBEDATACOLLECTIONRENTALCARPROCESSING,MAINLINESCREENINGBORDERCLEARANCEON-BOARDSAFETYDATATRANSFERUNIQUECVOFLEETMANAGEMENTDRIVERSDAILYLOGVEHICLESAFETYINSPECTIONTRANSITVEHICLEDATATRANSFER(gate)TRANSITVEHICLEREFUELINGMANAGEMENTLOCOMOTIVEFUELMONITORINGROLLOVERWARNINGLOWBRIDGEWARNING,CURVESPEEDASSISTANCEROLLOVERWARNING(1)INFRASTRUCTUREBASED-STOPLIGHTASSISTANT(2)INTERSECTIONCOLLISIONWARNING/AVOIDANCE(4)COOPERATIVECOLLISIONWARNINGV-V(5)VEHICLEBASEDPROBEDATACOLLECTION(B)COOPERATIVEADAPTIVECRUISECONTROL(ACC)COOPERATIVEVEHICLESYSTEMPLATOONING(9)HIGHWAY/RAILRAILROADCOLLISIONAVOIDANCE(10)IMMINENTCOLLISIONWARNING(D)EMERGENCYVEHICLEVIDEORELAYROADCONDITIONWARNINGWORKZONEWARNING,APPROACHINGEMERGENCYVEHICLEASSISTANT(3)EMERGENCYVEHICLESIGNALPREEMPTIONTRANSITVEHICLESIGNALPRIORITYGREENLIGHT-OPTIMALSPEEDADVISORY(8),CVOShort-MediumRange(090m),ALLVEHICLES-ShortRange(015m),ALLVEHICLES-ExtendedRange(90335m),PUBLICSAFETY-LongRange(3001000m),TOLLCOLLECTIONDATATRANSFER/INFOFUELING(A)DATATRANSFER/CVO/TRUCKSTOPDATATRANSFER/TRANSITVEHICLE(yard)DATATRANSFER/LOCOMOTIVE,ALLVEHICLESShort-MediumRange(090m),(#)ApplicationsSubmittedbyGM/Ford/Chrysler(A)ApplicationsSubmittedbyDaimler-Chrysler,APPLICABILITYUNDERINVESTIGATION,ENHANCEDROUTEPLANNINGandGUIDANCE(6)INFRASTRUCTUREBASEDTRAFFICMANAGEMENTDATACOLLECTEDfromPROBES(7),USERREQUIREMENTSEXCERPTSInteroperabilityacrossNorthAmerica-whereAllRSUscancommunicatewithALLOBUsandALLOBUscancommunicatetoALLotherOBUsatthelowesttierofcapability.Also,tiereddevicesshallbeimplementedsuchthateachlevelofdevicecanimplementallthemodesofoperationofthelevelsofdevicesbelowit.AllWeatherOperationTwo-way(roadsidetovehicle)CommunicationTwo-way(vehicletovehicle)CommunicationsubjecttoreviewofimpactonsystemrequirementsOne-wayCommunication-RequirebroadcastcapabilitywithoutbeingpartofanetExtremelylowlatencyintheorderofmilliseconds-IncludesacquisitionanddatatransferThesystemwillsupportauthenticationandaccesscontrols(Layers1and2mustsupportsecuritycontrols)TheISOL1andL2mustbeabletohandlealargenumberofunitsinthecommunicationzone.Ontheorderof50to100.Thesystemmustnotcollapseifthisnumberisexceeded.TransactionSize-500Bitsto100MbytesormoreTrafficSpeed-0to200km/h(0to120mph)TrafficFlowRate-3000v/h/l-(1to8lanes)MinimumcoordinatedRSUSeparation-3m(10ft),5.9GHzDSRCOPERATIONALCONCEPT/TECHNOLOGYREQUIREMENTS,USERREQUIREMENTSEXCERPTS(continued)Multimodal(roadandrail)MustallowuncoordinatedRSUsimplementingdifferentservicesonthesamechanneltooperateincloseproximity-15m(50ft)orless-EnableacceptablelevelsofinterferencebetweenneighboringDSRCapplicationsBroadcastReceptionRangeforallOn-boardEquipment-325m(1100ft)atastandardselectedRSEpoweroutputCommunicationzonesshallbevariablefrom2to1000m(7to3000ft);i.e.,TransactionSuccessRate-99.0to99.995%EnableLicensedOperationImplementVehicleLocationImplementLaneDiscrimination(impliesspecificationonantennatypeandOBUmounting)ImplementaHighDensityofApplicationsSupportMultipleOverlappingCommunicationZonesMeetFCC,IndustryCanada,andMexicanGovernmentRegulationsEnableAnEntryLevel-lowcost-deviceDoesNotRequireUsageFeesMultimodal(roadandrail)TheOBUmustbeabletonegotiatethefrequencyofoperationMustprovideprioritizedmediaaccess,5.9GHzDSRCOPERATIONALCONCEPT/TECHNOLOGYREQUIREMENTS,GREEN-PrimaryInfluenceonConcept,Approach:ActiveBandwidth:75MHz(5.850-5.925GHz)Modulation:QPSKOFDM(with16QAMand64QAMoptions)(BPSKpreamble)Channels:7-10MHzchannels(optionalcombinationsof10and20MHzchannels)DataRate:6,9,12,18,24,and27Mbpswith10MHzChannels(3Mbpspreamble)(or6,9,12,18,24,36,48,and54Mbpswith20MHzChanneloption)(6Mbpspreamble)MaxTxPwr:28.8dBm(attheantennainput)RSUEIRP:Nominal0-33dBm(1mW-2W)/Max.44.8dBm(30W)OBUEIRP:Nominal0-20dBm(1-100mW)/Max.44.8dBm(30W)RSUandOBUSensitivity:-82dBm(QPSK)/-65dBm(64QAM)C/I:4-6dB(forQPSK10-4BERcoded)/16-17dB(for64QAM10-4BERcoded)BandSharingStrategy-FrequencyCoordination.Selectionofalternatechannelsforadjacentzones.UseCSMAtopreventinterferencebetweenusersinthechannel.,5.9GHzDSRCTECHNOLOGYCHARACTERISTICS,RSU-RoadsideUnit;OBU-OnboardUnit;EV-EmergencyVehicle;EIRP-EffectiveIsotropicRadiatedPower;CSMA-CarrierSenseMultipleAccess,5.9GHzDSRCCHANNELFREQUENCYASSIGNMENTS,Frequency(GHz),5.850,5.855,5.860,5.865,5.870,5.875,5.880,5.885,5.890,5.895,5.900,5.905,5.910,5.915,5.920,5.925,5.825,5.830,5.835,5.840,5.845,CanadianSpecialLicenseZones*,PotentialCanadian(CA)DSRCAllocation,USSpreadSpectrumAllocation,Uplink,Downlink,Ch172,Ch174,Ch176,Ch178,Ch180,Ch184,Ch182,Uplink,Downlink,Ch172,Ch174,Ch176,Ch180,Ch184,Ch182,Ch178,*-TheuseofchannelsoverlappingthesezonesmayberestrictedinsomelocationsinCanada.,USandPotentialMexicanDSRCAllocation,(10MHzCHANNELS),“Reserved”forharmonizationwithpotentialextensionoftheUNIIband,5.9GHzDSRCBASICCONCEPTS,Channelsin5.850to5.925GHzfollowFCCCFRpart90andIndustryCanadarules10MHzchannels,optionalcapabilitytocombine2channelsetsinto20MHzchannelsRSUEIRPLimit44.8dBm(PublicSafety),33dBm(Private)OBUDeviceEIRPLimit44.8dBm(PublicSafety),33dBm(Private)Outofchannelemission25dBm(Alldevices)DedicatedControlChannelforannouncementsandwarningsControlChanneltransmissionscomplywithASTM/IEEEXXXXstandardAdedicatedchannelisreservedforVehicletovehiclecommunications.Intersectionapplicationoperationsareconductedinadedicatedchannel.2smallzoneServiceChannelsaredesignatedforextendeddatatransfers.2mediumzoneServiceChannelsaredesignatedforextendeddatatransfers.ChannelsintheUNIIbandmaybeusedasunlicensedServiceChannels.OBUsfollowRSUinstructionsinServiceChannels.OBUsimplementatimelimitonServiceChanneltransactions.,CFR-CodeofFederalRegulations,HARMONIZED5.9GHzDSRCBANDPLAN,Frequency(GHz),5.850,5.855,5.860,5.865,5.870,5.875,5.880,5.885,5.890,5.895,5.900,5.905,5.910,5.915,5.920,5.925,5.825,5.830,5.835,5.840,5.845,CanadianSpecialLicenseZones*,ProposedCanadianDSRCAllocation,USSpreadSpectrumAllocation,Ch172,Ch174,Ch176,Ch178,Ch180,Ch184,Ch182,Ch172,Ch174,Ch176,Ch180,Ch184,Ch182,Ch178,USandPotentialMexicanDSRCAllocation,ControlChannel,ServiceChannels,VehicletoVehicle,Optional20MHz,Optional20MHz,Optional20MHz,PrimarilyPublicSafetyHigh-powerApp.,Optional20MHz,“Reserved”forharmonizationwithpotentialextensionoftheUNIIband,10MHzChannelswith20MHzcombinationoptions,PotentialUNIIExpansionChannels,*-TheuseofchannelsoverlappingthesezonesmayberestrictedinsomelocationsinCanada.,Frequency(GHz),5.850,5.855,5.860,5.865,5.870,5.875,5.880,5.885,5.890,5.895,5.900,5.905,5.910,5.915,5.920,5.925,5.825,5.830,5.835,5.840,5.845,CanadianSpecialLicenseZones*,PotentialCanadian(CN)DSRCAllocation,USSpreadSpectrumAllocation,Uplink,Downlink,Uplink,Downlink,Ch172,Ch174,Ch176,Ch180,Ch184,Ch182,Ch178,*-ThechannelsoverlappingthesezonesmayberestrictedinsomelocationsinCanada.Inthesecasesusechannels166,168,and170intheirplace.,PublicSafety/Private,PublicSafetyIntersections,ControlChannel,PublicSafety/Private,PublicSafety/Private,USandPotentialMexicanDSRCAllocation,Intersections,Control,Veh-Veh,SpecialLicense,DedicatedPublicSafety,ShortRngService,PublicSafety/Private/SpecialLicense,PublicSafety/Intersection/SpecialLicense,PublicSafety/Private/SpecialLicense,MedRngService,SharedPublicSafety/Private,PublicSafety/Private,PublicSafetyVeh-Veh,5.9GHzDSRCBANDPLANwith10MHzCHANNELS,Frequency(GHz),5.850,5.855,5.860,5.865,5.870,5.875,5.880,5.885,5.890,5.895,5.900,5.905,5.910,5.915,5.920,5.925,5.825,5.830,5.835,5.840,5.845,CanadianSpecialLicenseZones*,PotentialCanadian(CN)DSRCAllocation,USSpreadSpectrumAllocation,Uplink,Downlink,Uplink,Downlink,Ch172,Ch175,Ch181,Ch184,Ch178,*-ThechannelsoverlappingthesezonesmayberestrictedinsomelocationsinCanada.Inthesecasesusechannels166,168,and170intheirplace.,PublicSafetyIntersections,ControlChannel,PublicSafety/Private,USandPotentialMexicanDSRCAllocation,SpecialLicense,PublicSafety/Private/SpecialLicense,PublicSafety/Intersection/SpecialLicense,PublicSafety/Private/SpecialLicense,PublicSafetyVeh-Veh,5.9GHzDSRCBANDPLANwith10andoptional20MHzCHANNELS,PublicSafety/Private,Intersections,Control,Veh-Veh,DedicatedPublicSafety,ShortRngService,MedRngService,SharedPublicSafety/Private,5.7250to5.925GHzDSRCandUNIICHANNELS,Frequency(GHz),5.850,5.855,5.860,5.865,5.870,5.875,5.880,5.885,5.890,5.895,5.900,5.905,5.910,5.915,5.920,5.925,5.825,5.830,5.835,5.840,5.845,5.750,5.755,5.760,5.765,5.770,5.775,5.780,5.785,5.790,5.795,5.800,5.805,5.810,5.815,5.820,5.725,5.730,5.735,5.740,5.745,USDSRCAllocation,USSpreadSpectrumAllocation,USUNIIAllocation,Uplink,Downlink,Ch149,Ch153,Ch157,Ch161,Ch-Channel,Un-licensed,Licensed,UNII,Ch172,Ch175,Ch178,Ch181,Ch184,ControlChannel,Intersections,Control,Veh-Veh,DedicatedPublicSafety,ShortRngService,MedRngService,SharedPublicSafety/Private,Unlicensed,Private,OperationalConceptsfor5.9GHzDSRCAPPLICATIONS,PreparedforASTM5.9GHzDSRCWritingGroup,DSRC-DedicatedShort-RangeCommunications,CommonVehicleOn-BoardEquipment(BasicConfiguration),5.850-5.925GHzMulti-ApplicationOBU(retrofitinstallation),Nottoscale,87.5-107.9MHzFMsubcarrier,800to900MHzCellularPhone,1575.42MHzGPSReceiver,1800to1900MHzPCSPhone,OtherITSCommunicationsEquipment,MultipleBandsTwo-wayRadio,76-77GHzCollisionAvoidanceRadar,?bandSatelliteRadio,909.75-921.75MHzToll&ParkingOBU(Add-onwhenneeded),CommonVehicleOn-BoardEquipment(BasicPatternProposal),5.850-5.925GHzMulti-ApplicationOBU(connectedtotheIDB),5.850-5.925GHzMulti-ApplicationOBU(360deghorizontalpattern),Themulti-applicationOBUsusea360deg.horizontalpatternforallapplications.,Nottoscale,909.75-921.75MHzToll&ParkingOBU(360deghorizontalpattern),CommonVehicleOn-BoardEquipment(EnhancedConfiguration),InterfaceDevices(Built-inDisplay,Annunciator,Microphone,Keypad,etc.connectedtotheComputer,whichisconnectedtotheIDB),909.75-921.75MHzToll&ParkingOBU(Add-onwhenneeded),5.850-5.925GHzMulti-Application360degreeantenna(factoryinstallation)(connectedtotheOBU),Nottoscale,5.850-5.925GHzMulti-ApplicationOBU(installedinthecomputer),Computer(factoryinstallation)(connectedtotheIDB),87.5-107.9MHzFMsubcarrier,800to900MHzCellularPhone,1575.42MHzGPSReceiver,1800to1900MHzPCSPhone,OtherITSCommunicationsEquipment,MultipleBandsTwo-wayRadio,76-77GHzCollisionAvoidanceRadar,?bandSatelliteRadio,CommonVehicleOn-BoardEquipment(EnhancedPatternProposal),5.850-5.925GHzMulti-ApplicationOBU(connectedtotheIDB),909.75-921.75MHzToll&ParkingOBU(360deghorizontalpattern),Themulti-applicationOBUsusea360deg.horizontalpatternforallapplications.,Nottoscale,5.850-5.925GHzMulti-ApplicationAntenna(360deghorizontalpattern),CommonVehicleOn-BoardEquipment(SeparateMulti-AppandVeh-VehOBUpartitions),InterfaceDevices(Built-inDisplay,Annunciator,Microphone,Keypad,etc.connectedtotheComputer,whichisconnectedtotheIDB),909.75-921.75MHzToll&ParkingOBU(Add-onwhenneeded),5.850-5.925GHzMulti-Application360degreeantenna1(factoryinstallation)(connectedtotheOBU),Nottoscale,5.850-5.925GHzMulti-ApplicationandVeh-VehpartitionsintheOBU(installedinthecomputer),Computer(factoryinstallation)(connectedtotheIDB),87.5-107.9MHzFMsubcarrier,800to900MHzCellularPhone,1575.42MHzGPSReceiver,1800to1900MHzPCSPhone,OtherITSCommunicationsEquipment,MultipleBandsTwo-wayRadio,76-77GHzCollisionAvoidanceRa