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1、LSPandλSPSetupinGMPLSNetworksTrichaAnjali,CaterinaScoglio,IanF.AkyildizBroadbandandWirelessNetworkingLaboratorySchoolofElectricalandComputerEngineeringGeorgiaInstituteofTechnology,Atlanta,GA30332Email:{tricha,caterina,ian}@ece.gatech.eduAbstractInthispap
2、er,anewoptimalpolicyisintroducedPacketWavelengthλtodetermineandadapttheGeneralizedMultiProtocolLabelPacket1...Switching(GMPLS)networktopologybasedonthecurrenttraf-Fiberficload.TheIntegratedTrafficEngineeringparadigmprovidesPacketWavelengthPacketλNmechanism
3、sfordynamicadditionofphysicalcapacitytoopticalnetworks.Intheabsenceofsuchmechanisms,therejectionofincomingrequestswillbehigher.TheobjectiveoftheproposedFig.1.LinkHierarchy.policyistominimizethecostsinvolvingbandwidth,switchingandsignaling.Thepolicyisderi
4、vedbyutilizingtheMarkovDecisionProcesstheory.Thenewpolicyissplitintotwolevels:networksonly.ItprovidestheadvantageofTrafficEngineeringtheMPLSnetworklevelandtheopticalnetworklevel.Inadditiontotheoptimalpolicy,asub-optimalpolicyandathreshold-(TE)whencompared
5、tootherroutingmechanisms,addedtobasedpolicyarealsoproposedwhicharelesscomputationallytheimprovedforwardingperformance.Inotherwords,MPLSintensivebuthavecomparableperformancetotheoptimalpolicy.mainlyfocusesonthedataplaneasopposedtoGMPLS’Theproposedpolicies
6、havebeenevaluatedbysimulationandfocusoncontrolplane.GMPLSextendstheconceptofLSPcomparedtosomeheuristics.Numericalresults,whichshowtheirsetupbeyondtheLabelSwitchedRouters(LSRs)towave-effectivenessandtheachievedperformanceimprovement,arepresented.length/fib
7、erswitchingcapablesystems.Thus,GMPLSallowsLSPhierarchy(oneLSPinsideanother)atdifferentlayersinIndexTermsOpticalnetworks,Stochasticprocesses,Markovthenetworkarchitecture.ThisconceptisillustratedinFig.1.DecisionProcesstheory,Optimization,GMPLS,Topologyadap
8、-tationInthishierarchy,thepacketswitchedlinkisnestedinsidealambdaswitchedlinkinsideafiberswitchedlink.GMPLSalsoperformsconnectionmanagementinopticalnetworks.ItI.INTRODUCTIONprovidesend-to-endserviceprovisioningfordifferents