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1、ATripleSpace-BasedSemanticDistributedMiddlewareforInternetofThingsAitorGomez-Goiri1andDiegoLopez-de-Ipi~na1DeustoTech,DeustoInstituteofTechnologyAvda.Universidades24,48007Bilbao,Spain{aitor.gomez,dipina}@deusto.eshttp://www.morelab.deusto.esAbstract.IntheInternetofThingsseveralo
2、bjectswithnetworkca-pabilitiesareconnectedoveraself-con guredlocalnetworkwithotherobjectstointeractandshareknowledge.Inthiscontext,theTripleSpaceapproach,wheredi erentprocessessharecommonsemanticknowledge,seemsto tperfectly.Inthispaperwepresentourprogresstowardsasemanticmiddleware
3、whichallowsthecommunicationbetweenawiderangeofembeddeddevicesinadistributed,decoupledandveryexpres-sivemanner.Thissolutionhasbeentestedinastereotypicaldeploymentscenarioshowingthepromisingpotentialofthisapproachforlocalenvi-ronments.Keywords:triplespace,ubiquitous,mobile,embedded,
4、semantic1IntroductionTripleSpacecomputingisacoordinationparadigmbasedontuplespace-basedcomputing.Intuplespacecomputingthecommunicationbetweenprocessesisperformedbyreadingandwritingdatastructuresinasharedspace,insteadofexchangingmessages[4].TheSemanticWebvisionaimstoo ermachine-und
5、erstandablepersistentdataforminganetworkformachinesinsteadofthecurrentWorldWideWebwhichismorehuman-centered(webserviceso erre-motefunctionalitytomachines,buttheyarenotreallyWeb-basedsincetheyaremessageexchange-driven).TripleSpace(TS)computingperformsatuplespacebasedcommunicationus
6、ingRDFtriples,inwhichtheinformationunithasthreedimensions:"subjectpredicateobject",toexpressthissemanticdata.ATripleSpaceo ersdi erenttypeofautonomywhichisnotreachablewithmessageexchange-drivencommunication,suchasreferenceautonomy(thepro-cessescancommunicatewithoutknowinganythinga
7、bouteachother),timeau-tonomy(becauseoftheasynchronouscommunication)andspaceautonomy(theprocessescanbeexecutedinverydi erentcomputationalenvironments).Incontextawareenvironments,alotofdevicescommunicatewitheachotherandsharetheirstateinordertoperformactionsovertheenvironment.Di er-e
8、ntapproachestode neandstorecontex
