ofdma系统自适应无线资源管理的cpn建模与仿真分析

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1、AbstractⅥ，irelesscommunicationsystemappearedonehundredyearsago．Nowithasbecomeanimportantpartinpeople’Sdailylifeandscientificresearchfield．Inthelatestgenerationofwirelesscommunicationsystemof4GOFDMA(OrthogonalFrequencyDivisionMultipleAccess)whichreceive

2、dwidespreadattentionlSaveryimportanttechnology．Researchesshowthat，OFDMAtechnologycarleffectivelyimprovetheaccessrateofwirelesscommunicationsystem．OFDMAsystemcanreducesIm玎owbandinterferenceandsymbolsinterferencecausedbymultipathspreadeffectively．RRM(Rad

3、ioResourceManagement)Callimprovecapacityandcontrolpowerinwirelesscommunicationnetworksystem．Toachievethehigherdatatransferrateandspectrumefficiency，RRMtechnologyistheonlywaytomaketheuseofradioresourceeffectivelyinOFDMAsystem．Inrecentyears，tobuildtheact

4、ualoperationmodelandanalysistheperformanceofatealsystem,simulationhasbecomeakindofeffectivemeasures．CPN(ColoredPetriNets)modelingtechnologyiswidelyusedinmodelingandperformanceanalysisofdifferentkindsoflargecomplicatedsystem．TherearealotofadvantagesofCP

5、Nmodelingtechnology．Ithashighvisualityandoperationspeed．Thesystemmodelisconvenienttomodifytoo．Atpresent，thestudyofCPNmodelingontheRRMoftheadaptiveOFDMAsystemismainlyaimedatadmissioncontrolpart．Therese铀．chIlasbeenverifiedthatCPNmodelisisomorphicwiththeM

6、arkovmodelinstatespace．CPNhaveprominentadvantagestoovercomemanyexistingproblemsfstarespaceexplosion,etc．)ofSPN(StochasticPetriNet)．However,thismodelonlyconsideredthetargettomaximizethecapacityofthesystem．Anditislackofresearchingonthepowercontrolanddist

7、ributionofthesystem．Thispaperfh'stlyuseCPNtobuildaadaptiveRRMmodeloftheOFDMAsysten：Lthismodelisbasedonthetargetofminimizingthetotalemissionpowerofthewholesystem．ItmodelsthecalladmissioncontrolandresourcedistributionpartsoftheOFDMAsystem．Inthissystemmod

8、el，thetargettominimizethetotalpowerIIIAbstractofthesystem(MAoptimizationalgorithm)isachievedbytheMLprogramminglanguage．ThisCPNmodelusesthehierarchicalmodelingmethod．Eachpartofthesystemisestablishedofsubnet．Then,ajointoptimizationadaptiv