OBS光突发交换简介.ppt

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1、OpportunitiesandChallengesforOpticalBurstswitchingWhyOBS?backgroundandcharacterTheprincipleofOBSarchitectureofOBSnodeProtocolofOBScontentionresolutionopticalpacketassemblymechanismApplicationandfutureLOBS(LabelOpticalBurstSwitching)overviewtoday:IPover(ATM/SONET)overWDMtrend:Integr

2、atedIP/WDM(withopticalswitching)goal:ubiquitous,scalableandfuture-proofNetworkArchitecturestrend:IntegratedIP/WDM(withopticalswitching)goal:ubiquitous,scalableandfuture-proofNetworkArchitecturesProgressinOpticalNetworksCapacityFunctionRingMeshDynamicStaticOpticalPacketPt-to-PtSingl

3、eChannelWDMOpticallyAmplifiedOpticalAdd/DropTopologyOpticalCircuitSwitchingOpticalBurstSwitchingOpticalPacketSwitchingOpticalLabelSwitchingProgressinOpticalNetworksUnderthesamenetworkconditions,OBSnetworkscanachieve20%~30%morethroughputthanthoseinOCSnetworks.ThroughputcomparisonOBS

4、vs.OCSData-centric+High-BandwidthPacket+OpticalmoderategranularityCost-effectiveservicedeliveryandflexibilityAvoidelectricalRAMandO/E/ObottleneckDRAMgettingfasteronlyby7%/yearO/E/OconversionconsumespowerandspaceScalabilityforfuturebandwidthgrowthsUseopticalparallelismforsimplerswit

5、chingfabricFromATM/SONETtoIP/WDMparadigmMotivationsforOpticalOBSSwitchingarchitectureofOBSnodeProtocolofOBScontentionresolutionopticalpacketassemblymechanismPrincipleofOBSWirelineO-CDMALANLegacyMANFreeSpaceandWirelineO-CDMALANOpticalCoreNetworkEdgerouterEdgerouterOLSroutersOLSswitc

6、hesStarCouplerMANStarCouplerMANEdgerouterLegacyLANOLSswitchesSENSORNetworksNextGenerationNetworkTopologyfiberdelayDEMUXNC&MSwitchingFabricLabelProcessingModule-TI(LP-TI)LabelProcessingModules-CI(LP-CI)CICICIOLEOLROLEOLROLEOLRIPRouterATMClientMachineUNASlabelreaderSwitchControllerw/

7、ForwardingLook-upTableOLSEdgeRouterExampleofanOLSRforIP,ATMorclient-specifictraficRapidTuning(~1nsec)ofT_WCtoachieveswitchinginWavelength,Time,SpacedomainsScalableto42Petabit/seccapacity32*(2562x2562)connectivityT_WCT_WCT_WCT_WCF_WCF_WCF_WCF_WCswitchcontrolTunableWavelengthConverte

8、rsl-router(AWGR)controller