国立中正大学通讯工程学系

WiMAXNetworkArchitecture潘仁義國立中正大學通訊工程學系[e-mail]WiMAXIntroductionWiMAXQoS&FlowNetworkWorkingGroup(NWG)NetworkReferenceModelNetworkEntryAuthentication,Authorization,andKeyHierarchyIPConfigurationSetupMobilityManagementQoSFunctionalModelOutlineWiMAXIntroductionWiMAXQoS&FlowNetworkWorkingGroup(NWG)NetworkReferenceModelNetworkEntryAuthentication,Authorization,andKeyHierarchyIPConfigurationSetupMobilityManagementQoSFunctionalModelWiMAXWorldwideInteroperabilityforMicrowaveAccessTheInstituteofElectricalandElectronicsEngineers(IEEE)802committee(802.16).OrthogonalFrequencyDivisionMultiplexing(OFDM)(carriersofwidthof5MHzorgreatercanbeused)connectivityatspeedsupto70Mbpsprovidehighspeedaccesstoabout60businessesatT1speeds.canserveuptoathousandhomesintermofDSLspeed.802.16HistoryTheinitial802.16standardin2002,operatesinthe10-to-66-GHzfrequencybandandrequiresLOStowers.The802.16aextension,ratifiedinMarch2003allowsuseof2to11GHzfrequency.Itboastsa50kmrangeand74.7Mbit/sec.Datatransferratesanddoesn'trequireLOStransmission.802.16History802.16bQualityofservice802.16cInteroperability,withprotocolsandtest-suitestructures802.16dFixingthingsnotcoveredby802.16c802.16eSupportformobileaswellasfixedbroadband(802.16e-2005)802.16fMIB802.16gSystem/resource/handoverManagementInteroperability802.16jRelayAdditional802.16standards:MobileWiMAXMobileTechnicalGroup(MTG)inWiMAXForumdevelopsthesystemprofileforMobileWiMAXsystemABroadbandwirelesssolution–Fixbroadbandnetwork–MobilebroadbandnetworkSignaling–OrthogonalFrequencyDivisionMultipleAccess(OFDMA)–ScalableOFDMAFeaturesHighDataRateQualityofServiceScalabilitySecurityMobilityWiMAXentityTwocomponentsSubscriberStations(SSs)SStypicallyservesabuilding(businessorresidence)BaseStation(BS)connectedtopublicnetworksBSservesSubscriberStationsprovideSSwithfirst-mile(orlastmile)accesstopublicnetworksScenarioOutlineWiMAXIntroductionWiMAXQoS&FlowNetworkWorkingGroup(NWG)NetworkReferenceModelNetworkEntryAuthentication,Authorization,andKeyHierarchyIPConfigurationSetupMobilityManagementQoSFunctionalModelIntroductionQoSsupportingisafundamentalpartoftheWiMAXMAC-layerdesign.HowdoesWiMAXsupportforQoS?ConnectionsAconnection-orientedMACarchitecturealldownlinkanduplinkconnectionsarecontrolledbytheservingBSEachconnectionisidentifiedbyaconnectionidentifier(CID)AserviceflowisaunidirectionalflowofpacketswithaparticularsetofQoSparametersisidentifiedbyaserviceflowidentifier(SFID)TheserviceflowcharacteristicsoftheconnectionprovidetheQoSforthatpacketServiceflowsComparisonsofSFID&CIDServiceFlowID(SFID)doesnotchangeuponHOacrossBSsbelongingtoasingleNAPSFIDshallbesetjustoncewhenalayer2serviceflowisoriginallyestablished,andSHALLNOTbemodifiedbyHOs.SFIDshallbeassignedwhenanewserviceflowissetupandshallbemaintainedasthesamevalueattheAnchorDataPathFunctioninspiteofHOs.ConnectionID(CID)isdefinedastemporaryinaparticularcellcoveragearea.CIDshallberefreshedwheneverMSmovesintoanewcell.SFIDidentifiesaparticularLayer2sessionwhileCIDspecifiesaparticularlogicalradiolink.OperationObjectModelServiceFlowManagementDynamicServiceChange(DSC)DynamicServiceDelete(DSD)DynamicServiceActivate(DSA)NULLOPERATIONALDSDDSADSCDynamicServiceFlowChangeClassifierAclassifierisasetofmatchingcriteriaappliedtoeachpacketItconsistsofsomeprotocol-specificpacketmatchingcriteria(destinationIPaddress,forexample)aclassifierpriorityareferencetoaCID.ClassifierscanbeaddedbydynamicsignalingSchedulerAssociatepacketsintoserviceflowDefineQoSparameterforeachserviceflowDynamicallyestablishingQoS-enabledserviceflowsAssociateQoSserviceflowwithlogicalconnectionsClassifierSchedulerBSMACPriorityqueuesMS1MACMS2MACQoSlogicalconnectionsServiceflowoverQoSconnectionsServiceflowsQualityofServiceSupportSchedulingservicesFourservicesaresupportedin802.16802.16-2004UnsolicitedGrantService(UGS),Real-timePollingService(rtPS),Non-real-timePollingService(nrtPS),andBestEffort(BE).Fiveservicesaresupportedin802.16e802.16e-2005UGS(UnsolicitedGrantService)RT-VR(Real-Time-VariableRateService)NRT-VR(Non-RealTime-VariableRateservice)BE(BestEfforts)ERT-VR(ExtendedReal-TimeVariableRate)UnsolicitedGrantService(UGS)supportreal-timedatastreamsconsistingoffixed-sizedatapacketsissuedatperiodicintervalsSuchasT1/E1andVoiceoverIPwithoutsilencesuppressionINTERNETVoIPReal-timePollingService(rtPS)supportreal-timedatastreamsconsistingofvariable-sizeddatapacketsthatareissuedatperiodicintervalsSuchasmovingpicturesexpertsgroup(MPEG)video.Non-real-timePollingService(nrtPS)supportdelay-tolerantdatastreamsconsistingofvariable-sizeddatapacketsforwhichaminimumdatarateisrequiredsuchasFTPBestEffort(BE)supportdatastreamsforwhichnominimumservicelevelisrequiredandthereforemaybehandledonaspace-availablebasis.ExtendedReal-TimeVariableRate(ERT-VR)servicesupportreal-timeapplicationswithvariabledata-rates,whichrequireguaranteeddataanddelay,forexampleVoIPwithsilencesuppression.OutlineWiMAXIntroductionWiMAXQoS&FlowNetw