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WiMAX系统中基于QoS的接纳控制算法研究.docx

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WiMAX系统中基于QoS的接纳控制算法研究 Abstract ThispaperfocusesonQoS-basedadmissioncontrolalgorithminWiMAXsystems.Asignificantstepinachievingefficientresourceutilizationinwirelesscommunicationsystemsistheadmissioncontrolmechanism.Giventhegreatlyincreasingdemandforhigh-qualitywirelesscommunicationservices,theimplementationofqualityofservice(QoS)-basedadmissioncontrolalgorithmsinWiMAXhasbecomeessential.Inthispaper,wefirstintroducetheessentialsofWiMAXsystems.Then,wedescribethevarioustypesofQoSthatexistinwirelesscommunications,followbyanoverviewofdifferenttypesofQoS-basedadmissioncontrolalgorithmsdevelopedinWiMAXsystems.Subsequently,weelaborateontheinnerworkingsoftheQoS-basedadmissioncontrolforWiMAX,andconcludewithadiscussionofsomeofthefutureresearchdirectionsinthisarea. Introduction WiMAX(WorldwideInteroperabilityforMicrowaveAccess)isatelecommunicationsprotocolthatprovideswirelesstransmissionofdatausingbroadbandtechnologies.Itwasdevelopedtoprovidebroadbandaccesstofixedandmobileusersinanefficientmanner.TheneedforefficientutilizationoftheavailableresourcesinWiMAXledtothedevelopmentofQoSmechanismsandvariousalgorithmsthatuseQoStoprovideaccesscontrol. TheadmissioncontrolmechanismisasignificantcomponentofQoS-basednetworks.Itregulatestheflowoftraffictoensurethatresourcesareefficientlyutilizedandservicequalityismaintained.QoS-basedadmissioncontrolalgorithmsaimtoachievesatisfactionforbothcustomersandserviceprovidersbyensuringthatonlytherequirednumberofusersareadmittedtothenetworkatagiventime.Thus,QoS-basedadmissioncontrolalgorithmsareessentialcomponentsofWiMAXsystems. QoSinWirelessCommunications QoSisanessentialmechanismthatprovidesdifferentiatedservicestodifferenttraffictypesinwirelesscommunicationnetworks.Wirelessnetworkshavelimitedbandwidthandahigherprobabilityofpacketloss,makingitessentialtoprovideQoStodeliverabetteruserexperience.QoSinwirelesscommunicationsistypicallydefinedbydifferentmetrics,whichincludethefollowing: 1.Bandwidth:Theamountofdatathatcanbetransmittedbetweentwodevices. 2.Pr