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PrincipleandKeyTechnologiesofOTNPage2Page3Inthenext3to5years,newbusinessdevelopmentwilldriverapidgrowthinbusinessvolume. Rapidgrowthofnewbusinessbasedbroadbandservicesoflargeparticles. Alargenumberbroadbandservicesoflargeparticlesrequireeffectiveschedulingandmanagement,improvingtheQoS,tomeettheneedsofnetworkoperators.PDHAnalysisofthedifferentTransmissionTechnologyWDMDemanddrivestechnologydevelopment ConceptofOTNFrameworkofOTNOTNCharacteristicOTNcharacteristicOTNTechnicalSuperiority OTNHierarchicalStructureOTNHierarchicalStructureFunctionofOTNeachlayerClientPage20Page21Page22Page23Page24Page25Page26Page27OTUk/ODUkOverheadPage29Page30AccessPointIdentifier(SAPI,DAPI)typecodedefinedbySuggestionT.50Page32Page33Page34Page35Page36Page37Page38GCC1GCC2:thefunctionissameasGCC0 APS/PCC&EXP&TCMACK,nostandardization,reservedforfuture.Page40MappingClientSignalsMappingIPandEthernetGenericFramingProcedureG.7041MappingATMTimeDivisionMultiplex-StructureWavelengthDivisionMultiplex-StructurePage47 OTHequipments:wavelengthleveltrafficcross completethewavelengthcrossandscheduling. Trafficparticles ODUk(k=1,2,3) Rateoftrafficparticles ODU1(2.5Gb/s)、ODU2(10Gb/s)、ODU3(40Gb/s)ODU1/ODU2/ODU3crossRealization:OTUdividedintotheClientsideandGroupofroadside Features: Largetrafficparticles:1-100Gb/s Largecrossparticles ThereisnouniformcrossparticleslikeVC4 ProtectiontheScheduling OnlyneedtochangeinterfaceplatewhentrafficchangesOTHsystem:SDHequipmentremoved, increasingtheODUkcrossmatrix; ODUkcrossmatrixachievedbycrossplate.Page52Page53Page54Page55Page56Page57Page58Page59Page60Currently,therearethreecommontechniquesinROADMsubsystem: PLC(PlanarLight-waveCircuits) WB(WavelengthBlocker) WSS(WavelengthSelectiveSwitch)TheworkingprincipleofWBTechnologyofWBTheWorkingPrincipleofPLC-ROADMTechnologyofPLCTechnologyofWSSTheWorkingPrincipleofWSSPage68OTNControlPlaneOTNEvolution