OTN学习笔记OTN基本原理OTN产生背景原有WDM技术仅在物理层面上统一标准，即针对WDM系统中传送信号的波段、频率间隔等做出了规定，对信号的帧结构没有制定统一的标准。使得WDM在传递如STM64、10GbE等信号时产生了性能监测、帧结构、开销管理等难题。OTN特点OTN是以波分复用技术为基础，通过G.872、G.709、G.798等一系列ITU-T的建议所规范的新一代“数字传送体系”和“光传送体系”。OTN解决传统WDM网络无波长/子波长业务调度能力、组网能力弱、保护能力弱等问题。在OTN网络的边缘层，业务信号被封装进入统一的、开销丰富的OTN体制中的帧结构中去，实现基于OTN体制的WDM全网统一运营、管理、维护。OTN在电域为OTH，在光域为ROADM。OTN在光域内可以实现业务信号的传递、复用、路由选择、监控，并保证其性能要求和生存性。OTN可以支持多种上层业务或协议，如SONET/SDH，ATM，Ethernet，IP，PDH，FibreChannel，GFP，MPLS，OTN虚级联，ODU复用等。下表为ITU-T构建的OTN协议框架。DefinitionsG.870DefinitionsandTerminologyforOpticalTransportNetworks(OTN）FrameworkforRecommendationsG.871/Y.1301FrameworkforOpticalTransportNetworkRecommendationsArchitecturalAspectsG.872ArchitectureofOpticalTransportNetworksG.872Amend.1ArchitectureofOpticalTransportNetworksG.872LivingListControlPlaneASTN/ASONrecommendationsaremovedtospecificASTN/ASONstandardspageStructuresMappingG.709/Y.1331Networknodeinterfacefortheopticaltransportnetwork(OTN)G.709/Y.1331Addendum1G.709LivingListG.975ForwardErrorCorrectionFunctionalCharacteristicsG.798Characteristicsofopticaltransportnetwork(OTN)equipmentfunctionalblocksG.798Amendment1G.798LivingListG.806Characteristicsoftransportequipment-DescriptionMethodologyandGenericFunctionalityG.7710/Y.1701CommonEquipmentManagementRequirementsProtectionSwitchingG.808.1(G.gps)Genericprotectionswitching-LineartrailandsubnetworkprotectionG.873.1OpticalTransportnetwork(OTN)-LinearProtectionG.873.1Errata1OpticalTransportnetwork(OTN)-LinearProtectionManagementAspectsG.874ManagementaspectsoftheopticaltransportnetworkelementG.874.1OpticalTransportNetwork(OTN)Protocol-NeutralManagementInformationModelForTheNetworkElementViewG.875OpticalTransportNetwork(OTN)managementinformationmodelforthenetworkelementviewDataCommunicationNetwork(DCN)G.7712/Y.1703ArchitectureandspecificationofdatacommunicationnetworkG.dcnlivinglistErrorPerformanceG.8201(G.optperf)Errorperformanceparametersandobjectivesformulti-operatorinternationalpathswithintheOpticalTransportNetwork(OTN)G.optperflivinglistM.2401(M.24otn)ErrorPerformanceLimitsandProceduresforBringing-Into-ServiceandMaintenanceofmulti-operatorinternationalpathsandsectionswithinOpticalTransportNetworksJitter&WanderPerformanceG.8251(G.otnjit)Thecontrolofjitterandwanderwithintheopticaltransportnetwork(OTN)G.8251Amendment1Thecontrolofjitterandwanderwithintheopticaltransportnetwork(OTN)G.8251Corrigendum1Thecontrolofjitterandwanderwithintheopticaltransportnetwork(OTN)Physical-LayerAspectsG.664GeneralAutomaticPowerShut-DownProceduresforOpticalTransportSystemsG.691OpticalInterfacesforsingle-channelSDHsystemswithOpticalAmplifiers,andSTM-64andSTM-256systemsG.692OpticalInterfacesforMultichannelSystemswithOpticalAmplifiersG.693Opticalinterfacesforintra-officesystemsG.694.1SpectralgridsforWDMapplications:DWDMfrequencygridG.694.2SpectralgridsforWDMapplications:CWDMwavelengthgridG.695OpticalinterfacesforCoarseWavelengthDivisionMultiplexingapplicationsG.696.1(G.IaDI)Intra-DomainDWDMapplicationsG.697(G.optmon)OpticalmonitoringforDWDMsystemG...
