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1、IEEETRANSACTIONSONINDUSTRIALINFORMATICS,VOL.8,NO.2,MAY2012393RDDS:AReal-TimeDataDistributionServiceforCyber-PhysicalSystemsWoochulKang,KrasimiraKapitanova,StudentMember,IEEE,andSangHyukSon,SeniorMember,IEEEAbstract—Oneoftheprimaryrequirementsinmanyandinformationamongparticipatingentiti
2、es.Forinstance,con-cyber-physicalsystems(CPS)isthatthesensordataderivedsiderateamoffirefightersinvolvedinasearch-and-rescuetaskfromthephysicalworldshouldbedisseminatedinatimelyandduringabuildingfire.PDAscarriedbythefirefighterscollectreliablemannertoallinterestedcollaborativeentities.Howeve
3、r,datafromnearbysensorstomonitorthedynamicstatusoftheprovidingreliableandtimelydatadisseminationservicesises-peciallychallengingforCPSsincetheyoftenoperateinhighlybuilding.Eachindividualfirefighter’sPDAhasonlylimitedin-unpredictableenvironments.Existingnetworkmiddlewarehasformationfromne
4、arbysensors.Therefore,inordertocreatealimitationsinprovidingsuchservices.Inthispaper,wepresentmoreglobalpictureofthesituation,allPDAshavetocollabo-anovelpublish/subscribe-basedmiddlewarearchitecturecalledratebysharingtheirlocallycollectedreal-timedata[2],[3].TheReal-timeDataDistributio
5、nService(RDDS).Inparticular,webuilding-widesituationassessmentrequiresthefusionofdatafocusontwomechanismsofRDDSthatenabletimelyandreliablefromall(ormost)firefighters.OtherexamplesofsuchCPS,re-sensordatadisseminationunderhighlyunpredictableCPSenvi-ronments.First,wediscussthesemantics-awar
6、ecommunicationquiringcollaborationamongalargenumberofparticipatingen-mechanismofRDDSthatnotonlyreducesthecomputationandtities,includefuturecombatsystems[4],vehicularnetworks[5],communicationoverhead,butalsoenablesthesubscriberstounmannedvehiclegroups,andtrafficcontrol.Fortheseapplica-ac
7、cessdatainatimelyandreliablemannerwhenthenetworkistions,thetimely,scalable,andreliabledisseminationofsensorsloworunstable.Further,weextendthesemantics-awarecommu-datatoothercollaboratingentitiesisessential.nicationmechanismtoachieverobustnessagainstunpredictableTheprimarydifficultyofs
