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1、AnAdaptiveEnergyEfficientMACProtocolfortheMedicalBodyAreaNetwork***N.F.TimmonsandW.G.Scanlon*WiSARLab,LetterkennyInstituteofTechnologyLetterkenny,DonegalEmail:nick.timmons@lyit.ie**SchoolofElectronics,ElectricalEngineeringandComputerScienceQueen’sUnive
2、rsity,BelfastEmail:w.scanlon@qub.ac.ukAbstract—MedicalbodyareanetworkswillemploybothA.MedicalBANTechnicalRequirementsimplantableandbodyworndevicestosupportadiverserangeofThemainchallengeinmedicalBANsistobalancetheapplicationswiththroughputsrangingfroms
3、everalbitsperhourdemandsofthehardenergyconstraintassociatedwithlowupto10Mbps.Thechallengeistoaccommodatethisrangeofapplicationswithinasinglewirelessnetworkbasedonasuitablypowerwirelesssensordevices,withthequalityofserviceflexibleandpowerefficientmedium
4、accesscontrolprotocol.To(QoS)demandsofthewiderangeofsensingandcontrolthisend,wepresentaMedicalMediumAccessControlapplications.Forexample,abatterypoweredimplanted(MedMAC)protocolforenergyefficientandadaptablechannelmedicaldeviceideallymusthavealifetimeo
5、fupto10years.accessinbodyareanetworks.TheMedMACincorporatesaUnlikeotherwirelessnetworks,itisgenerallyimpracticaltonovelsynchronisationmechanismandinitialpowerefficiencychargeorreplaceexhaustedbatteries,andthereforebatterysimulationsshowthattheMedMACpro
6、tocoloutperformstheIEEE802.15.4protocolfortwoclassesofmedicalapplications.lifetimedefinesnodelifetime.SincethetransceiverKeywords—BAN,wireless,sensor,network,protocol,MAC.communicationoperationsconsumemuchmoreenergythantheprocessingoperations,itisaprim
7、aryobjectivetominimiseI.INTRODUCTIONtransmitandreceiveoperationstomaximisenodelifetime.Therefore,themediumaccesscontrol(MAC)protocolinaTherapidexpansionofwirelesstechnologyhasinevitablyBANmustbehighlyenergyefficient.Themainenergysavingledtothepossibili
8、tyofwidespreadun-tetheredmedicalandfeaturesthatmustbeexhibitedbyawelldesignedMAChealthmonitoring.Healthmonitoringsystemswhichusecableprotocolare:collisionavoidance,overhearing,controlpacketasamediumcannowbereplacedwithwirelessconnection