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1、AGeneralModelofWirelessInterferenceLiliQiuYinZhangFengWangMiKyungHanRatulMahajanUniversityofTexasatAustinMicrosoftResearchAustin,TX78712,USARedmond,WA98052,USA{lili,yzhang,wangf,hanmi2}@cs.utexas.eduratul@microsoft.comABSTRACTThishaspromptedresearcherstodevisemodelsthatareseededusingmeasuremen
2、tsfromtheunderlyingnetwork[1,24].TheseWedevelopageneralmodeltoestimatethethroughputandgood-measurementsareusuallycollectedinasimplecon?guration,suchputbetweenarbitrarypairsofnodesinthepresenceofinterfer-aseachnodesendingbyitself.Theyarethenusedtopredicttheencefromothernodesinawirelessnetwork.O
3、urmodelisbasedimpactofinterferenceinmorecomplexcon?gurationssuchasmul-onmeasurementsfromtheunderlyingnetworkitselfandisthustipletransmittingnodes.ThisisapromisingdirectionbecauseitmoreaccuratethanabstractmodelsofRFpropagationsuchasthosemakesnoassumptionsaboutthenatureofradiopropagationwhichbas
4、edondistance.Theseedmeasurementsareeasytogather,re-hasprovendif?culttomodelinrealenvironments.quiringonlyO(N)measurementsinanN-nodenetworks.Com-However,theexistingmeasurement-basedmodelsarequitelim-paredtoexistingmeasurement-basedmodels,ourmodeladvancesited.Theydonotapplytocon?gurationsthathav
5、emorethantwothestateoftheartinthreeimportantways.First,itgoesbeyondsendersortwo?ows,haveunicasttraf?c,orhavesenderswith?nitepairwiseinterferenceandmodelsinterferenceamonganarbitrarydemands.Theonlywaytodaytopredictnetworkbehaviorundernumberofsenders.Second,itgoesbeyondbroadcasttransmis-thesegen
6、eralcon?gurationsistoactuallymeasureit.(Indeed,mostsionsandmodelsthemorecommoncaseofunicasttransmissions.experimentalresearchtodayisforcedtoadoptthismethodology.)Third,itgoesbeyondhomogeneousnodesandmodelsthegeneralButmeasurementaloneisinsuf?cientbecauseitlackspredictivecaseofheterogeneousnode
7、swithdifferenttraf?cdemandsanddif-powerandscalability.Whileitcanaccuratelypredicttheperfor-ferentradiocharacteristics.Usingsimulationsandmeasurementsmanceofthemeasuredcon?guration,itcannotpredictperformancefromtwodifferentwirelesstestbe
