a scalable and ontology-based p2p infrastructure for semantic web services

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1、AScalableandOntology-BasedP2PInfrastructureforSemanticWebServices12MarioSchlosserMichaelSintekStefanDeckerWolfgangNejdlStanfordUniversity{schloss,sintek,stefan,nejdl@db.stanford.edu}AbstractfulluseofSemanticWebServicescapabilitiesusingacentralizedsystemdoesnotscalegracefully

2、tolargeSemanticWebServicesareapromisingcombinationofnumberofservices.ThisdifficultyisseveredbytheSemanticWebandWebservicetechnology,aimingatevolvingtrendtoubiquitouscomputinginwhichmoreprovidingmeansofautomaticallyexecuting,discoveringandmoredevicesandentitiesbecomeservicesa

3、ndandcomposingsemanticallymarked-upWebservices.Weservicenetworksbecomeextremelydynamicduetoenvisionpeer-to-peernetworkswhichallowforcarryingconstantlyarrivinganddepartingserviceproviders.outsearchesinreal-timeonpermanentlyreconfiguringInthispaper,wepresentanapproachtoenhance

4、thenetworkstobeanidealinfrastructurefordeployingacapabilitiesofSemanticWebServiceswiththedynamicsnetworkofSemanticWebServiceproviders.However,andreal-timesearchcapabilitiesofpeer-to-peernetworks.P2PnetworksevolvinginanunorganizedmannersufferWeaddressamajorproblemcurrentlyfac

5、edindeployingfromseriousscalabilityproblems,limitingthenumberofP2Pinfrastructures:Gnutella-style[3]P2Pnetworksdonodesinthenetwork,creatingnetworkoverloadandnotscaletolargenumbersofpeers.Searchtimesandpushingsearchtimestounacceptablelimits.Weaddressnetworkloadincrease,whileno

6、guaranteesnoreventheseproblemsbyimposingadeterministicshapeonP2Pmeaningfulestimatescanbegivenonthecompletenessornetworks:WeproposeagraphtopologywhichallowsforsuccessrateofsearchesonthenetworksincecurrentP2Pveryefficientbroadcastandsearch,andweprovideannetworksuseinefficientb

7、roadcastmechanismsassearchefficienttopologyconstructionandmaintenancetechniques.algorithmwhich,crucialtosymmetricpeer-to-peerWearriveatanefficientP2Pinfrastructurebynetworks,doesneitherrequireacentralservernorsuperorganizingpeersinaP2Pnetworkintoagraphstructurenodesinthenetw

8、ork.WeshowhowourschemecanbebasedonhypercubesinourHyperCuP(HypercubeP2P)made