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1、IEEETRANSACTIONSONINFORMATIONTHEORY,VOL.51,NO.12,DECEMBER20054091TransmissionCapacityofWirelessAdHocNetworksWithOutageConstraintsStevenP.Weber,Member,IEEE,XiangyingYang,Member,IEEE,JeffreyG.Andrews,Member,IEEE,andGustavodeVeciana,SeniorMember,IEEEAbstract—In
2、thispaper,upperandlowerboundsonthetrans-Althoughrecentresearchhasmadegreatstridestowardmissioncapacityofspread-spectrum(SS)wirelessadhocnetworksunderstandingwirelessadhocnetworkcapacity,therearearederived.Wedefinetransmissioncapacityastheproductofthestillfund
3、amentalquestionsthatremainatleastpartiallyunan-maximumdensityofsuccessfultransmissionsmultipliedbytheirswered.Inparticular,howdoesthecapacitydependonvariousdatarate,givenanoutageconstraint.AssumingthatthenodesarerandomlydistributedinspaceaccordingtoaPoissonp
4、ointsystemparametersincludingchannelcharacteristics,choiceofprocess,wederiveupperandlowerboundsforfrequencyhoppingphysicallayer,mediumaccesscontrol(MAC)scheduling,and(FH-CDMA)anddirectsequence(DS-CDMA)SSnetworks,powerconsumption?Inthispaper,weapproachthispro
5、blemwhichincorporatetraditionalmodulationtypes(nospreading)bystudyingtworepresentativemodelsforSSadhocnetworks,asaspecialcase.Theseboundscleanlysummarizehowadhocwhichincorporatetraditionalmodulationtypes(nospreading)networkcapacityisaffectedbytheoutageprobab
6、ility,spreadingfactor,transmissionpower,targetsignal-to-noiseratio(SNR),andasaspecialcase.Toconsiderthecapacity,wefirstintroduceothersystemparameters.Usingthesebounds,itcanbeshownausefulnotiontermedtheoptimalcontentiondensity,whichthatFH-CDMAobtainsahighertra
7、nsmissioncapacitythancorrespondstothemaximumspatialdensityofnodesthatDS-CDMAontheorderof1,whereisthespreadingcancontendforthechannelsubjecttoaconstraintonthefactorand2isthepathlossexponent.Atangentialcon-typicaloutageprobability.Wethendefineourmetricforadtrib
8、utionisan(apparently)noveltechniqueforobtainingtightboundsontailprobabilitiesofadditivefunctionalsofhomoge-hocnetworkcapacity,termedtransmissioncapacity,tobeneousPoissonpointprocesses.theareaspe
