浙江联通承载网IP化工程设计摘要2009年初，中国联通获得了WCDMA3G牌照，从此高速增长的3G新增用户及其网络数据流量给中国联通原有数据传输承载体系带来了前所未有的压力。中国联通也为此开展了多层次的网络承载改造。2009年初，原浙江联通和原浙江网通合并成为了新浙江联通，这为联通提供了新的承载网支持，但也带来了原有承载改造计划需求更改、网络兼容互通方面的问题，而这些都是以IT网络的融合为基础。而新联通成立也为宁波联通建设新的核心承载网改造提供了契机。随着业务需求和通信技术的发展，通信网的业务和网络融合已经成为通信网发展的主要方向。传统意义上的专有数据传输网网络正在逐渐演进成电信企业内部多应用的综合数据网络平台。为了实现一个物理承载网承载多个逻辑独立的业务，NGN、IPoATM、MSLPVPN等各项技术被引入到网络建设中。本文通过论述核心承载网的特征和各项相关技术的原理，阐述了NGN、MGW等技术作为核心承载网IP化实现的核心技术的可行性，描述了浙江联通下辖的宁波联通核心承载网结构的设计过程，详细说明了最终实现的方案和步骤，最后本文总结了本次网络建设中的不足和对未来的展望。关键词：承载网IP化，光传输网络，WCDMA，MPLS，传输系统改造AbstractTheWCDMAdatatransportationkeptgrowingwitharapidlyhighpacesinceChinaUnicomCorporationacquiredtheWCDMAoperatinglicenseinearly2009,whichcameupwithnewsystempressandbearerrequestsontheoriginalbearernetworksystem.Thenetworkarchitecturedistributedoriginallyandnetworksystemexpandgraduallyhavebecomeanimportantfactorinnetworkintegration.TheoriginalZhejiangUnicomCo,andpreviousZhejiangNetcomCo,mergedtoformthenewZhejiangUnicom,whichwouldprovideanewbearernetworksupport.However,thereareproblemssuchasrequirementschangesinoriginalcore-bearersystemupgradeprojects,andtherehadbeennetworkcompatibilityissuestodealwith.Ontheotherhand,itisgreatchancetoboostupthere-constructionofcore-bearernetworkinChinaUnicom,Ningbobranch.Legacyof“dataonly”transmissionnetworksubsystemisrapidlyplayingtheroleascommonnetworkplatformintelecommunicationindustry.ThroughthedescriptionofZhejiangUnicomIP-basedcorebearernetworkdesignandimplementationinthispaper,demonstratingthefeasibilityofthenetworkstatus,networkstructureanditsimplementation.Alotoftechnical,likeNGN、IPoATM、MSLPVPNareappliedinachievingthegoalofmanagingmultiplelogicallyindependentserviceswithonebearer-network.Byintroducingtherelevanttechnicalmeansandsupportequipment,byintroducingthemajorprocedureindesigningofthecorebearer-networkinNingbo,abranchofZhejiangUnicom,wewilldiscussthepossibilityinapplyingnewtechnologysuchasNGN,MGWtothisnewnetworkingconstruction.KeyWords：IP-basedBearerNetwork，OpticalEthernter，WCDMA，MPLS，transfersystemreforming目录摘要...............................................................................................................................iAbstract.........................................................................................................................ii目录.............................................................................................................................iii图目录.........................................................................................................................vi表目录........................................................................................................................vii第1章绪论.................................................................................................................11.1课题背景...................................................
