reputation-based cooperative spectrum sensing with trusted nodes assistance

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1、226IEEECOMMUNICATIONSLETTERS,VOL.14,NO.3,MARCH2010Reputation-BasedCooperativeSpectrumSensingwithTrustedNodesAssistanceKunZeng,PrzemysławPawełczak,andDanijelaCabri´ˇcAbstract—Existingcooperativespectrumsensing(CSS)thetrustedthresholdarereliable,andtheirsensingresultsareschemesaretypicallyvulnerableto

2、attackswheremisbehavedthenincorporatedinCSS.Simulationresultsfurtherverifycognitiveradios(CRs)falsifysensingdata.Toensurethetheeffectivenessoftheproposedscheme.Thatis,theschemerobustnessofspectrumsensing,thisletterpresentsasecureworkswellevenwhenthereisalargenumberofmisbehaviors,CSSschemebyintroduci

3、ngareputation-basedmechanismtoidentifymisbehaviorsandmitigatetheirharmfuleffectonsensingwhiletheexistingschemes[4],[5],[6]donotperformperformance.EncouragedbythefactthatsuchsecureCSSissatisfactorilyundersuchcircumstances.sensitivetothecorrectnessofreputations,wefurtherpresentaTheremainderofthispaper

4、isorganizedasfollows.Sec-trustednodeassistancescheme.ThisschemestartswithreliabletionIIpresentsthesystemmodel,whileSectionIIIintro-CRs.SensinginformationfromotherCRsareincorporatedintoducestheproposedreputation-basedCSSschemeswithoutandcooperativesensingonlywhentheirreputationisverified,whichincrease

5、srobustnessofcooperativesensing.Simulationsverifywiththetrustednodesassistance(TNA).SectionIVpresentstheeffectivenessoftheproposedschemes.simulationresultsforourproposedschemes,andSectionVIndexTerms—Cognitiveradio,cooperativespectrumsensing,concludestheletter.distributeddecision-making,security,trus

6、tednodesassistance.II.SYSTEMMODELI.INTRODUCTIONConsideranetworkof?CRsdetectingcooperativelyOGNITIVEradio(CR)hasrecentlyemergedasaprimaryusersignalofcomplexvalueofgivenspectrumbandCpromisingcandidatetoefficientlyreusetheunderutilizedbasedonenergydetection.Let??(?)for?=1,2,...,?spectrumresources[1].CRn

7、etworkallowsforexploitingtherepresenttheobservationsoverthe?thsensingintervalatunusedspectrumindynamicallychangingenvironmentwithvariousCRs.Thenthebinaryhypothesistestforprimaryminimalinterferencetoli