简介:Theproblemofcloudcooperationofmilitaryserviceproviders(MSPs)isaddressedforallocatinglimitedresourcestomilitaryserviceusers(MSUs)thataregeographicallydistributed.TheMSPs,alsocalledmilitaryorganizationclouds,arevirtualizedandencapsulatedbytheservicestheycanofferandeachofthemcontainsdifferentkindsofresourcesthatMSUneeds.TheMSPsarealsogeographicallydispersed.TheyarerequiredtoallocatetheirresourcestotheMSUcomplyingwiththecorrespondingqualityofservice(QoS),sothateachMSUgatherstheservicesitneedstoguaranteeitstasktobeimplemented.TheoutlineofmilitaryorganizationcloudcooperationisdiscussedandthemethodofserviceoptimalselectionisproposedbasedonQoSevaluation.TheQoSevaluationmethodbasedonexponentialapproximationisputforwardtoincludetheusers’will.Simulationresultsverifytheeffectivenessoftheproposedalgorithm.
简介:Mobileadhocnetworks(MANETs)aregainingalotofattentioninresearchlatelyduetotheirimportanceinenablingmobilewirelessnodestocommunicatewithoutanyexistingwiredorpredeterminedinfrastructures.Furthermore,inordertosupportthegrowingneedformultimediaandrealtimeapplications,qualityofservice(QoS)supportbythenetworkingprotocolisrequired.SeveralimportantQoSparametersthatareneededbysuchapplicationscanbeidentified.Theyincludebandwidth,end-to-enddelay,delayjitter,andbiterrorrate.Agoodamountofresearchhasbeendevelopedinthisareacoveringdifferentissuesandchallengessuchasdevelopingroutingprotocolsthatsupportbandwidthreservationanddelaymanagement.Inthispaper,thecurrentstateofresearchforQoSsupportinTDMA-basedMANETsatdifferentlayersofthenetworkingmodelispresentedandcategorized.Inaddition,thecurrentissuesandfuturechallengesinvolvedinthisexcitingareaofresearcharealsoincluded.
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简介:ToimproveuserexperienceofcompositeWebservices,auser-awarequalityofservice(QoS)basedWebservicescompositionmodelisproposed.Undersuchmodel,aWebservicesselectionmethodbasedonquantumgeneticalgorithmisproposed.Thisalgorithmusesquantumbitencoding,dynamicstep-lengthquantumgateangleadjustment,neighborhoodservicesearchanddynamicpunishmentstrategytoexpandsearchscopeandspeedupconvergence.SimulationexperimentshowsthatthisalgorithmismoreefficientthanotherexistingalgorithmsinWebservicesselection.
简介:从QoS控制模型和网络QoS控制的关键技术入手,概述了下一代InternetQoS的重要性、体系结构和当前QoS的控制技术,为进一步提高下一代InternetQoS提供了研究基础。