《出版社通信英語(yǔ)》課件OTN-光傳送網(wǎng)

OTNInrecentyears,theservicescarriedbycommunicationnetworkshaveundergonetremendouschanges.Dataservicesdevelopedrapidly,especiallybroadbandservices,suchasIPTVandvideodevelopment.Thedataserviceputsforwardnewrequirementstothetransmissionnetwork.undergov.經(jīng)歷，經(jīng)受tremendousa.極大的，巨大的，驚人的video

n.視頻，錄像putforward提出，拿出Transmissionnetworksmustprovidehighbandwidthtoaccommodatethisgrowth.Moreimportantly,itrequiresatransportnetworkthatcanbequicklyandflexiblyscheduledtomeettheneedsoftheservice.CurrentlythemaintransmissionnetworkisusingSDHandWDMtechnology,buttheybothhavesomelimitations.accommodatev.容納，適應(yīng)flexiblea.靈活的，有彈性的schedule

v.安排，預(yù)定，調(diào)度complete

v.完成，使完滿maintenancen.維護(hù)，維修limitation

n.限制，極限SDHtechnologyemphasisonelectrical-layerservice,ithasflexiblescheduling,managementandprotectionmechanismandperfectOAMfunction.ThetraditionalSDHtransmissionnetworkhastheserviceschedulingcapabilityofsmallparticleandlimitedtransmissioncapacity.Itcannottransmitefficientlybroadbandserviceoflargeparticle.WDMtechnologybasedonopticallayerhastheadvantagetoprovidehighcapacityoftransmissionduetoitstransmissioncharacteristicsofmulti-wavelengthchannel.emphasis

n.重點(diǎn)，強(qiáng)調(diào)mechanismn.機(jī)制，原理particlen.顆粒，粒子multi-wavelength多波長(zhǎng)However,thecurrentWDMnetworksmainlyareappliedinpointtopointmode,lackingofeffectivenetworkmaintenanceandmanagementtool.Opticalschedulingsystem(suchasROADM)canachievetheschedulingandprotectionabilitysimilartoSDH,butitisdifficulttobeappliedtoawiderangeofnetworksduetothelimitationofphysicallayerandwavelength.effectivea.有效的achievev.取得，獲得OTNtechnologyhasbothoftheadvantagesoftraditionalSDHandWDM.OTNadoptsWDMtechnologyinopticallayer,whichcanrealizethetransmissionoflargeparticles.OTNusesasynchronousmappingandmultiplexingattheelectricallayertosupportODUk(k=1,2,3,4,flex)crossing-connectionparticles.ComparedwithSDHVC-12/VC-4schedulingparticles,thetransmissionparticlesofOTNmultiplexing,crossoverandconfigurationaresignificantlylarger,whichcansignificantlyimprovetheadaptabilityandtransmissionefficiencyofhigh-bandwidthdatacustomerservices.adopt

v.采取，接受asynchronousa.異步的，不同時(shí)的mapping

n.映射，映像multiplexing多路復(fù)用，多工configuration

n.配置，結(jié)構(gòu)adaptability

n.適應(yīng)性，適應(yīng)力TheOTNtechnologyincludesacompletesystemstructureofopticallayerandelectricallayer,eachlayerhasacorrespondingmechanismofnetworkmanagement,monitoringandsurvival.TheOTNtechnologycanprovidepowerfulOAMcapabilities,andenablesuptosixtandemconnectionmonitoring(TCM)capabilities,providingadvancedperformanceandfaultmonitoring.structure

n.結(jié)構(gòu)，構(gòu)造correspondinga.相當(dāng)?shù)模鄳?yīng)的tandema.串聯(lián)的faultn.故障，缺點(diǎn)TheOTNequipmentsbasedoncross-functionalODUkcancompletecircuitswitchingparticlesfromtheSDH-155Mto2.5G/10G/40G,realizingflexibleschedulingandprotectiontolarge-particlesservices.TheOTNequipmentscanalsointroduceASON-basedintelligentcontrolplane,improvingtheflexibilityandsurvivabilityofnetworkconfiguration.cross-functionala.交叉功能的intelligenta.智能的，聰明的survivabilityn.生存性，生存能力TheOTNequipmentshallhavethefunctionsofcustomerinterface,interfaceadapterandlineinterfaceprocessing.ThereareseveralformsofOTNequipment,suchasOTNterminalmultiplexer,OTNelectrical-crossingequipment,andOTNphotoelectrichybrid-crossingequipment.adaptern.適配器，接合器photoelectrica.光電的hybrida.混合的，雜種的OTNTerminalMultiplexeristheWDMequipmentthatsupportstheinterfacesofOTN,whichincludethelineinterfaceandtributaryinterface(alsocalledservicesinterfaceorinter-domainnetworkinterface).Performanceandfaultmonitoringofend-to-endwavelengthpathcanberealized.ThecurrentmainstreammanufacturersofWDMsystemhavebasicallyadoptedOTNstructure,andsupportOTNinterfaceinG.709standard,sotheyareallOTNterminalmultiplexers.

tributarya.附屬的，輔助的mainstreamn.主流，主要傾向SimilartotheexistingSDHcross-connectionequipment,OTNelectric-crossingequipmentimprovesthecrossingfunctionofcircuitODUklevel,providingflexiblecircuitschedulingandprotectionforOTNnetwork.OTNelectric-crossdevicescanexistindependently,similartotheSDHDXCequipments,providingavarietyofexternalinterfacesandOTUkinterfaces.TheycanalsobeintegratedwiththeOTNterminalmultiplexertoprovideopticalmultiplexingandopticaltransmissionsectionfunctionsupportingWDMtransmission.externala.外部的，外用的flexiblea.靈活的protectionn.保護(hù)Electrical-crossingequipmentofOTNcancombinewithOChcrossingequipment(ROADMorPXC)toprovideschedulingfunctionofODUkelectricallayerandOChopticallayer.Wave-levelservicesspanOChdirectly,andotherservicesthatneedtobescheduledmustcrossoverODUk.Thecombinationofbothcancomplementeachother,butalsoavoidtheirweaknesses.Thislarge-capacityschedulingequipmentisphotoelectrichybridcrossofOTNequipment.span

v.跨越，持續(xù)complementv.補(bǔ)充，補(bǔ)足TypicalequipmentofthistypeisOSN6800producedbyHuawei,whichsupportsOCh-crossingbasedonROADMandODU1/GEcrossing.ODU1crossingcapacityis320GandsupportsASONcontrolplane.Othermanufacturers,suchasZTE,aredevelopingsimilarproducts.AccordingtothedifferentexistenceformsofOTNequipments,therearealsodifferentapplicationmethodsofOTNinnetworkconstruction,suchasthewholeOTNofWDMsystems,OTNcrossing-deviceapplicationsinLong-distancebackboneandOTNcrossing-deviceapplicationsinMAN.TheintroductionofOTNinterfacesinWDMsystemcancompleteperformanceandfaultmonitoringforendtoendwavelengthpath.OTNcanrealizethetransparenttransmissionofallkindsofclientsignals,whichistheprerequisitefortheroutertousethe10GEinterface.TheOTNinterfaceisintroducedgraduallyintoWDMsystem,preparingfortheintroductionoflarge-capacityequipmentofOTNinthefuture.transparenta.透明的，顯然的prerequisiten.先決條件Withthedevelopmentoflong-distanceIPnetwork,IPtrafficsurgesgreatly,andthelong-distancebackbonecorenodeisfacingincreasingvolumeofservices.AndinordertomakemoreeffectiveuseofIPnetworkresources,improvetheutilizationrateofrelaycircuitornetworkoperationquality,itisnecessarytouselargecapacityOTNcrossoverequipmentinthelong-distancebackbonenetwork.surge

v.洶涌，起大浪utilizationn.利用，使用complicateda.難懂的，復(fù)雜的Theuseoflarge-capacityOTNequipmentcan