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1、2009FifthInternationalConferenceonMobileAd-hocandSensorNetworksASuboptimalResourceAllocationAlgorithmforOFDMA-basedMulti-hopCellularNetworksZhengXiang,XumingFangJiannongCaoKeyLabofInformationCodingandTransmissionDepartmentofComputingSouthwestJiaotongUniversityH
2、ongKongPolytechnicUniversityChengdu,610031,ChinaHungHum,Kowloon,HongKongxz3_83@163.com,xmfang@swjtu.edu.cncsjcao@comp.polyu.edu.hkAbstract—Orthogonalfrequencydivisionmultipleaccessterminalswithinshadowingareacanbeimprovedthrough(OFDMA)-basedmulti-hopcellularnet
3、works,benefitedfromtheforwardingbyrelaystations(RSs).Inaddition,thesignaltorelayandOFDMtechnologies,havealotofadvantagesoverinterferenceplusnoiseratio(SINR)ofterminalsontheedgeoftraditionalwirelesscellularnetworksincludingbetternetworkacellisusuallypoorduetolar
4、geinterference,resultingincoverageviarelaystation(RS),theflexibilityandadaptationinlowerlinkcapacityaccordingtoShannoncapacityequation.radioresourceallocation.Inthispaper,theradioresourceUsingrelaytechnology,aworselinkwithlowercapacitycanallocationforwirelessre
5、laylinksinOFDMA-basedmulti-hopbedividedintotwobetterlinkswithhighercapacityandcellularnetworksisinvestigated.ThetopologyofanOFDMA-therebythecapacitybetweenbasestationandterminalsisbasedmulti-hopcellularnetworkisdescribedasahierarchicalincreased.Moreover,asnetwo
6、rktrafficincreases,therewillbetreeconfiguration,uponwhichathroughput-orientedobjectivetheperiodsoftimewhenthetrafficofthenetworkismorethanfunctionisformulatedandtheconstraintsincludinglinkthecapacityofoneBSwhilelessthanthecapacityoftwoBSs.proportionalfairnessar
7、eimposed.InordertomaximizeThus,thewasteofsettingupanewbasestationinthenetworkthroughputwithalowcomplexity,asuboptimalalgorithmisproposedtooptimizeallocationofsubcarriersandrelatedpowers.canbeavoidedbyaddingarelaystationwithsmallercapacitySimulationresultsshowth
8、atwhencomparedtofixresourcetomeetthetrafficincrease.allocationschemessuchasOFDM-timedivisionmultipleaccessOntheotherhand,orthogonalfrequencydivision(TDMA),theproposedalgorit
