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1、华中科技大学硕士学位论文ABSTRACTInrecentyears,advancesinwirelesstechnologyandtherapiddevelopmentofwirelessdeviceshasbroughtgreatconveniencetopeople'slives.Whiletheexistingspectrumresourceamountlessandutilizationrateislow,whichhampersthewirelesstechnologydevelopmentandhinderpeopleforwirelessservicerequirements
2、,However,theexistingresourcesutilizationrateislowinfrequencyspectrumresourceisthemaincauseoftension.Therefore,improveexistingspectrumresourcesutilizationratiotodevelopnewspectrumresourcesmoremeaningful.CognitiveradionetworkCRNsistosolvethefrequencyspectrumresourceutilizationloweffectivemeasures，Th
3、epreviouspeopleforcognitiveradiotechnologyresearchmainlyfocusonunauthorizeduserstoavailableauthorizedthespectrumofperception,andqualityguaranteeQoSalsomainlyistoreducetheunauthorizeduserstotheinterferenceofauthorizedusers.However,aspeopleforwirelessnetworktechnologyneedsdiversificationandauthorize
4、duserofchanneloccupancyofthedynamiccharacteristics,limitedbandwidthresourcesandcomplexchannelcharacteristicsleadtohighbiterrorrate,limitsthebandwidthanddelayforthosewhohavehighrequirementsofthevideovoiceandothermultimediareal-timeserviceinCRNsapplication,giveusstudycognitiveradionetworkspectrumres
5、ourcesharingtechnologyPUforwardagreatchallenge.Inthispaper,themainresearchcharacteristicsareasfollows:1、Accesstodynamicspectrumanalysis,establishawhileprovidingreal-timebusiness(real-timeservice,RT)andnon-real-timebusiness(non-real-timeservice,NRT)ofCRNsspectrumallocation5dMarkovchainmodel,WhenCRN
6、sinusertrafficwithinacertainperiodoftimeinastablestate,themodelthantraditionalforCRNsperformanceanalysisofON/OFFstateofchannelmodelhaslowcomputingtimecomplexity;2、Forreal-timeandnon-real-timeservicedifferentrequirementsontheperformanceofthesystem,combinedwiththeQoSdemandcharacteristicsofthecogniti
7、veusers,thetwocognitiveusersaredividedintodifferentpriorities,real-timebusinesshasrelativelyhigherpriority,non-real-timebusinesswithlowerpriority.UsedforIII万方数据华中科技大学硕士学位论文unauthorizeduserswithbuffer、unauthorized
