Wimax宽带无线接入技术.ppt

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1、TianJingUniversityChenmiao2011年3月14日WimaxforBroadbandWirelessAccess1Outline1.WhatisWiMAX2.802.16Introduction3.802.16dReferenceModel4.802.16dMACHighlights5.802.16dPHYHighlights6.802.16Networkarchitecture7.802.16Scenarios21.WhatisWiMAX?WorldwideInteroperabilityforMicrowaveAccess(

2、WiMAX)isthecommonnameassociatedtotheIEEE802.16standards.ThesestandardsareissuedbytheIEEE802.16subgroupthatoriginallycoveredtheWirelessLocalLooptechnologieswithradiospectrumfrom10to66GHz.3ComparedwithWifi:higherthroughputQoSandenhancedsecurityservicesgoodscalabilityfortheentiren

3、etwork4IEEE802.15xBluetoothWANMANLANPANETSIHiperPANIEEE802.11xWirelessLANETSIHiperLANIEEE802.16xWirelessMANETSIHiperMAN&HIPERACCESSIEEE802.20x(proposed)3GPP,EDGE(GSM)2.IEEE802.16x--Introduction563.802.16dReferenceModel78MAClayerisconnection-oriented,mappingtothePSonthebusinessa

4、ndassociatedwithdifferentlevelsofQoS.WhenanPSisinstalledintothesystem,itcanprovidethebusinessflow.WhenthePStoCompletetheregistration,theconnectionassociatedwiththetraffictoprovidetherequestedbandwidthguarantee.Whentheuserservicerequirementschange,maycreateanewconnection.4.802.1

5、6dMACHighlights9Aconnectionnotonlydefinesthemappingwiththeconvergencelayer,butalsodefinethebusinessflow,businessflowdefinedinthePDUtransmittedonthisconnectiontheQoSparameters.ProvidesatrafficuplinkanddownlinkoftheQoSmanagementmechanism.104.1ServiceSpecificConvergenceSublayer(CS

6、)CSsub-layerismainlyresponsibleforthecompletionofexternalnetworkdatabetweenthedataandtheCPSsub-layermapping.Itallfromtheconvergencelayerserviceaccesspoint(CSSAP)receivedexternaldataintothenetworkandmappedtoMACSDU,andthroughtheMACServiceAccessPoint(MACSAP)senttotheCPSsub-layer.I

7、nthisprocess,CSsub-layerontheexternalnetworkdataclassifythemwiththeappropriateMACserviceflowIDandtheconnectionidentifierCIDSFIDtheassociation,andalsoperformloadheadercompressionPHS.114.2MACCommonPartSublayer(CPS)CPSsub-layerprovidesthecoreMAClayerfunctions,includingsystemaccess

8、,bandwidthallocation,connectionestablishmentandmainten