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1、Agilla:AMobileAgentMiddlewareforSelf-AdaptiveWirelessSensorNetworks16CHIEN-LIANGFOK,GRUIA-CATALINROMAN,andCHENYANGLUWashingtonUniversityinSt.LouisThisarticlepresentsAgilla,amobileagentmiddlewaredesignedtosupportself-adaptiveappli-cationsinwirelesssensornetwork
2、s.Agillaprovidesaprogrammingmodelinwhichapplicationsconsistofevolvingcommunitiesofagentsthatshareawirelesssensornetwork.Coordinationamongtheagentsandaccesstophysicalresourcesaresupportedbyatuplespaceabstraction.Agentscandynamicallyenterandexitanetworkandcanaut
3、onomouslycloneandmigratethemselvesinre-sponsetoenvironmentalchanges.Agilla’sabilitytosupportself-adaptiveapplicationsinwirelesssensornetworkshasbeendemonstratedinthecontextofseveralapplications,including?rede-tectionandtracking,monitoringcargocontainers,androb
4、otnavigation.Agilla,the?rstmobileagentsystemtooperateinresource-constrainedwirelesssensorplatforms,wasimplementedontopofTinyOS.Agilla’sfeasibilityandef?ciencywasdemonstratedbyexperimentalevaluationontwophysicaltestbedsconsistingofMica2andTelosBnodes.Categories
5、andSubjectDescriptors:C.2.4[Computer-CommunicationNetworks]:DistributedSystems—DistributedapplicationsGeneralTerms:Design,Reliability,AlgorithmsAdditionalKeyWordsandPhrases:Agent,mobileagent,wirelesssensornetwork,middlewareACMReferenceFormat:Fok,C.-L.,Roman,G.
6、-C.,andLu,C.2009.Agilla:Amobileagentmiddlewareforself-adaptivewirelesssensornetworks.ACMTrans.Autonom.Adapt.Syst.4,3,Article16(July2009),26pages.DOI=10.1145/1552297.1552299http://doi.acm.org/10.1145/1552297.15522991.INTRODUCTIONBecauseWirelessSensorNetworks(WS
7、Ns)areembeddedandexposedtoadynamicworld,manyofitsapplicationsmustadapttochangesinthephysicalenvironmentortheuser.Forexample,aWSNthattracksawild?remustadapttochangesinthewild?re’sposition,andaWSNthatprovidesarobotwithextendedsituationalawarenessinitsvicinitymus
8、tadapttothemovementsThisresearchissupportedbytheONRunderMURIresearchcontractN00014-02-1-0715andbytheNSFundercontractCNS-0520220.Authors’address:C.-L.Fok,G.-C.Roman,C.Lu,Departmento
