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1、WIRELESSCOMMUNICATIONSANDMOBILECOMPUTINGWirel.Commun.Mob.Comput.(2009)PublishedonlineinWileyInterScience(www.interscience.wiley.com)DOI:10.1002/wcm.777TrustedcognitiveradionetworkingKwang-ChengChen1∗,Peng-YuChen2,NeeliPrasad2,Ying-ChangLiang3andSumeiSun31I
2、nstituteofCommunicationsEngineeringandDepartmentofElectricalEngineering,NationalTaiwanUniversity,Taipei,Taiwan,ROC2CenterforTeleInFrastruktur,AalborgUniversity,Aalborg,Denmark3InstituteforInfocomResearch,A-STAR,SingaporeSummaryNetworkingcognitiveradiosandn
3、odesfromprimarysystem(PS)resultsinaheterogeneouscoexistingmulti-radiowirelessnetwork,sothatsignificantnetworkthroughputgaincanbeachieved.However,byinvestigatingcognitiveradionetwork(CRN)architecture,thelinksinCRNsareunlikelytosupportcompletesecuritycheckdue
4、tolinkdynamics,opportunisticavailability,anduni-directionalinavailabletimewindow.Wethereforeintroducetrustedcognitiveradionetworking(TCRN)concepttofacilitatenetworkfunctionssuchasassociationindynamicspectrumaccessandrouting.Firstofall,weexplorethemathemati
5、calframeworkfortrustinCRNs.WethenshowsuccessfulassociationofnodetoCRNbasedonthemathematicalstructureoftrustfromstatisticaldecisiontheory.Furthermore,wemodifythemachine-learningalgorithmtoupdatethetrustmeasureforeachnode,anddeveloprulesofthumbstofacilitateT
6、CRNwithlearningcapability,basedonnumericalsimulations.TrustedCRNcangreatlyalleviateheterogeneouschallengeforCRNoperation.Copyright©2009JohnWiley&Sons,Ltd.KEYWORDS:cognitiveradio;cognitiveradionetworks;trust;trustednetworking;cognitiveradionetworkarchitectu
7、re;statisticaldecision1.Introductionfunctionstomeetqualityofservicesremainsawide-openresearcharea,wherewecallsuchscenarioasTheconceptofcognitiveradio(CR)waspioneeredcognitiveradionetworkingtoformacognitiveradiobyJ.Mitola,III,andhasbeenwidelydiscussedinnetw
8、ork(CRN)byconsideringnodesofbothpri-literatures[1–3].Itsfundamentalideaisthatradiomarysystem(s)andcognitiveradios.ItisobviousthatcommunicationsarepossiblebyusingthespectrumCRNisadynamicallyandstochasticallyor
