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1、广西大学毕业设计（论文）课题名称《有线电视网络双向改造设计》学院计电学院专业计算机网络学号010106203482姓名石磊指导教师（签名）年月日教研室主任（签名）年月日二OO年月日otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,Secret
2、aryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand23摘要本文描述了南宁有线电视网络的现状和正在进行的改造采取方案，对
3、新旧网络进行了比较，新旧网中双向业务的实现。广电网络是基于CATV发展起来的HFC网络，传统的HFC网络主要是为传输有线电视服务的，所以是以单向下行广播式的传输方式。有线电视经过近十年的发展，光缆已经越来越靠近用户，许多光节点覆盖的用户在500－200户之间。广电网络为了提供如宽带接入、数字电视点播等更多增值业务，所以必须对传统的HFC网络进行双向网改造。从目前技术选择来看，采用Cablemodem方式和采用IPQAM方式实现双向业务的接入是较多为用户所接受和选择的改造方案。关键字：双向网改造、光缆、HFC、Cablemodem、IPQAM。otherstaf
4、foftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofS
5、tateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand23SummaryThistextdescriptionthecityofNanNingnumeralthepresentconditionofthetelevisionnetworkwithunderwayofreformationadoptaproject,ri
6、ghtnessnewtheoldnetworkcarriedoncomparison,intheoldnetdoubletobusinessofrealization,newthereceiveofprograminthesystemwithdeliveredtocarryonanalysis.ThebrocastingnetworkistheHFCnetworkwhichgetupaccordingtotheCATVdevelopment,traditionofHFCnetworkmainisinordertodelivercabledT.V.service
7、,sowithone-waybottomlinebroadcastingdeliveroftypeway.CabledT.V.throughthedevelopmentindecade,thefiberopticcablehavealreadymoreandmoreclosedtoacustomer,manylightthenodeoverlayofcustomerat500of200,theelectriccableradiusbeorsointhe500m.Brocastingnetworkforprovidingtotaketoconnecttogoin
8、tosuchasthebreadth,
