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1、AbstractWirelessAdHocnetworkisaself^organizedmobilenetwork,comparedwiththetraditionalcellularnetworks,itisformedwithouttheaidoffixedinfrastructure.Duetoitsflexibilityandhighsurvivability,itiswidelyusedinmilitary,civilianandcommercialareas.TheconnectivityofAdHocnetworkis
2、criticalforitstopologyisdynamic.Besides,connectivityisaprerequisiteforAdHocnetworkanditisthefoundationforthedesignofthehigherlayer.ThisthesisstudiestheconnectivityofAdHocnetworkandanalysisesthefactorsthataffectconnectivitybasedonstochasticgeometry・Firstly,bi-connectivit
3、yinoneandtwodimensionalAdHocnetworkisinvestigated.Fortheone-dimensionalcase,thebasicconditionsforbi-connectivityarediscussedfromtheviewpointoftheprobabilityandtheclosedformulaforbi-connectivityprobabilityisderived.Thenforthetwodimensionalnetwork,basedonthemobilityofthen
4、odesinAdHocnetwork,anodemovingalgorithmimprovingtheeffectivenessofthelinkisstudied・Thisalgorithmchangesthenetworkfrom1-connectivitytobi-connectivityandenhancesthenetworkconnectivityandinvulnerability.Secondly,theconnectivitybasedonfadingchannelsisanalyzed.AccordingtoPoi
5、ssonpointprocess,thenetworkmodelissetup.WithRayleighfadingchannels,aSIRmodelisusedtocalculatetheprobabilityofbeingnoisolatednodeandthenthenetworkconnectivityprobabilityisobtained・Thirdly,theeffectsofinterferenceinAdHocnetworkarestudied.Basedonshot-noisetheory,theinterfe
6、rencemodelissetuptocalculatethestatisticalcharactcrisiticsofinterference.Thenthecloseformulafortheprobabilityofbeingnoisolatednodeisobtained.Thesimulationvalidatesthecorrectnessoftheformulaandshowsthattheinterferenceinthedensenetworkwillincrease,itisusefultoimprovethene
7、tworkconnectivitybydistributingthenoderationallyandeffectively.Finally,interferencesuppressionusingCSMAprotocolisinvestigated.ThenetworkmodelissetupbasedonMaternpointprocessandthenewnodedensityisobtained・AccordingtotheinterferencemodelinCSMAnetwork,theclosedformulaofcon
8、nectivityprobabilityisderived.Fromthesimulationresults,itishelpfultocontrolinterferenceandimprovenetworkconnec
