摘要传送网是对传统传输系统进行改进，而加入了交换智能技术而形成的这种网络和业务网保持独立，主要的作用是分配电路给交换节点/业务节点的连接，为这类节点的通信提供支持，目前主要的传送网有同步数字系列/同步光纤网络（SDH/SONET）和分组传送网（PTN）、光传送网（OTN）三种类型。其中光传输网引入了SDH到WDM系统中，因而综合了二者的优势，且可对各层网络进行监控，这种网络下，光层和电层保持一定的独立性，可很好都满足网络运营及维护相关的要求。在光传输网的迅速发展下，目前互联网用户的数量、通信需求也在不断的提高。根据目前此方面的发展形势进行预测可知，现有的配置已经无法满足未来数据业务承载相关要求，因而很有必要发展大容量超高速传输技术。本文通过研究传送网的结构和发展历史，介绍了目前主用的传送网技术，并重点阐述了OTN和100GOTN技术特点和发展进程，以及它们的应用场景和发展趋势，针对目前宁夏移动城域网OTN带宽利用率高、导致用户体知感差的情况进行了分析，说明了发展100GONT网络的重要性，研究并实现了宁夏移动城域网100GOTN工程建设项目的具体方案及工程建设，对比分析了100GOTN环网建设完成前后的城域网波道带宽利用率、OLT（光线路终端）的峰值带宽利用率，验证了100GOTN的优势性和未来发展的必然性，为后续宁夏移动光城域网建设使用提出了可行型高的经济型投资建设方案，这对于以后更大范围的开展宁夏移动城域网OTN建设具有现实意义。关键词：传送网；OTN；带宽；城域网ABSTRACTTransportnetworkisanimprovementoftraditionaltransmissionsystem,andthenetworkandservicenetworkformedbyaddingswitchingintelligencetechnologyremainindependent.Itsmainfunctionistoconnectthedistributioncircuittotheswitchingnode/servicenodeandprovidesupportforthecommunicationofsuchnodes.Atpresent,themaintransmissionnetworksareSDH/SONET,PTNandOTN.TheopticaltransmissionnetworkintroducesSDHtoWDMsystem,whichintegratestheadvantagesofbothandcanmonitorthenetworkatalllevels.Underthisnetwork,theopticallayerandthelayermaintainacertaindegreeofindependence,whichcanwellmeettherequirementsofnetworkoperationandmaintenance.Withtherapiddevelopmentofopticaltransmissionnetwork,thenumberofInternetusersandcommunicationneedsareconstantlyimproving.Accordingtothecurrentdevelopmentsituationinthisarea,theexistingconfigurationcannotmeettherequirementsoffuturedataservicebearer,soitisnecessarytodevelophigh-capacityandultra-high-speedtransmissiontechnology.Bystudyingthestructureanddevelopmenthistoryoftransportnetwork,thispaperintroducesthemaintransportnetworktechnologyatpresent,andfocusesonthecharacteristicsanddevelopmentprocessofOTN(OpticalTransportNetwork)and100GOTNtechnology,aswellastheirapplicationscenariosanddevelopmenttrends.InviewofthehighbandwidthutilizationofOTNinNingxiaMobileMetropolitanAreaNetworkandthepooruserperception,thispaperanalysesthedevelopmentof100GOTNtechnology.TheimportanceofONTnetworkisstudiedandrealized.ThespecificschemeandengineeringconstructionofNingxiaMobileMetropolitanAreaNetwork100GOTNprojectarestudiedandrealized.TheutilizationratioofchannelbandwidthandpeakbandwidthofOLTbeforeandafterthecompletionof100GOTNringnetworkconstructionarecomparedandanalyzed.Thesuperiorityof100GOTNandtheinevitabilityoffuturedevelopmentareverified.Theapplicationof100GOTNinNingxiaMobileOpticalMetropolitanAreaNetworkconstructionisputforward.ThefeasibleandhigheconomicinvestmentconstructionschemehaspracticalsignificanceforthefuturedevelopmentofOTNconstructionofNingxiaMobileMetropolitanAreaNetworkinalargerscale.Keywords:TransportNetwork;OTN;Bandwidth;MAN目录摘要................................................
