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1、DesignofaPulseSensortoDetectMediumActivityinUWBNetworksNathanielJ.August,Hyung-JinLee,andDongSamHaofpicoseconds.ThelowdutycyclepulserepeatsatapulseAbstract-Impulse-basedultrawideband(I-UWB)isanrepetitioninterval(PRI)ofnanosecondstomicroseconds.attractiveradiotechn
2、ologyforlargeadhocandsensornetworksInwirelessnetworks,themediumaccesscontrol(MAC)duetoitsrobustnesstomultipatheffects,sub-centimeterrangingprotocolperformstheimportantfunctionofmitigatingability,simplehardware,andlowradiatedpower.Currentinterferenceamongnodes.Curr
3、entMACprotocolsforI-UWBmediumaccesscontrol(MAC)protocolsforI-UWBtargetsmallwirelesspersonalareanetworks(WPANs)andcellularnetworks,targetsmallwirelesspersonalareanetworks(WPANs)andbuttheyarenotsuitableforlarge,multihopadhocandsensorcellularnetworks[3],[4],[7],[8].T
4、hesecentralizedapproachesnetworks.Inapreviouswork,weproposedamethod,termedareagoodstrategyforsmallnetworkswithheavytrafficandpulsesense,toquickly,reliably,andefficientlydetectmediumstrictQualityofService(QoS)requirements.However,inactivityinanI-UWBnetwork.Pulsesen
5、seenablesadistributedlargeadhocandsensornetworks,theseprotocolsimposeMACprotocolforI-UWBradiosthatissimilartocarriersenseimpracticalconstraintssuchascentralcoordination(whichmultipleaccess(CSMA)innarrowbandsystems.ThispaperinvestigatesCMOSRFcircuitimplementationof
6、apulsesensorleadstoacentralpointoffailure),morecomplexhardware,oranditssystemleveldesignconsiderations.Simulationresultscontroltrafficoverhead.showthattheproposedimplementationispracticalandimprovesWeinvestigateasimple,distributedMACprotocolthatisthenetworkperform
7、ance.suitableforI-UWBradiosinlargeadhocandsensornetworks.Inadistributedprotocol,eachnodeindependentlyIndexTerms-UltraWideband,AdHocandSensorNetworks,decidestotransmitwithoutcentralsynchronizationorcontrol.MediumAccessControl,CarrierSense,PulseSense,CMOSThus,distri
8、butedprotocolsdonotaddcontroltrafficoverhead,requirecentralcoordination,orsignificantlycomplicatehardware.ManydistributedMACprotocolsarebasedonI.INTRODU
