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私立华联学院毕业设计论文-1-摘要信息产业是当今世界经济领域中最具有活力和竞争力的产业之一，它影响着人类的生活方式和生活质量。接入网是用户网进入城域网/骨干网的桥梁。随着SDH技术的大规模推广应用和ATM技术的发展，电信网的主干网已经基本上实现了光纤化、宽带化和数字化。本文首先对接入网技术做了概述。通过对定义、物理参考模型、接入技术、发展趋势等相关内容的简要介绍，说明了光纤接入网是接入网技术发展的必然趋势。然后，本文深入研究了铜线接入和光纤接入这两种接入网的接入技术，着重研究光纤接入尤其是无源光网络(PON－PassiveOpticalNetwork)和目前主流的FTTx(FiberToThex)。接着，本文对“光进铜退”的解决方案进行了具体的研究和分析。主流运营商的第一公里接入网络仍然主要以双绞线铜缆网络为主，为了满足日益增长的带宽需求，实现光纤接入，现有的铜缆接入网就必须进行改造。最后，本文对光接入网网管技术进行了介绍，讲述符合TMN要求的接入网管理系统的结构和功能，以及接入网网管功能的实现。关键词：接入网，光纤通信，PON私立华联学院毕业设计论文-2-ABSTRACTInformationindustryistheworld'seconomythemostdynamicandcompetitiveindustriesintheworld,itaffectsthewaypeopleliveandthequalityoflife.Accessnetworkistheusernetworkaccesstometro/backbonebridge.WiththepopularizationandapplicationofSDHtechnologyandlarge-scaledevelopmentofATMtechnology,telecommunicationsnetworkbackbonehasbeenbasicallyrealizedfiber,broadbandanddigital.Firstly,anoverviewofaccessnetworktechnology.Bydefinition,thephysicalreferencemodel,accesstechnology,trendsandotherrelatedcontentoutlineindicatingtheaccessnetwork,opticalaccessnetworkistheinevitabletrendoftechnologicaldevelopment.Secondly,thisin-depthstudyofthecopperaccessandopticalaccesstoboththeaccessnetworkaccesstechnology,andfocusedonparticularpassiveopticalfiberaccessnetworks(PON-PassiveOpticalNetwork)andthecurrentmainstreamFTTx(FiberToThex/someplace).Then,thepaperLightofCoppersolutionforspecificresearchandanalysis.mainstreamoperatorsfirstkilometeraccessnetworksarestilllargelydominatedbytwistedpaircoppernetwork,inordertomeetthegrowingbandwidthdemand,toachieveopticalaccess,theexistingcopperaccessnetworkmustbemodified.Finally,ontheopticalaccessnetworktechnologiesareintroduced,consistentwithTMNrequirementsabouttheaccessnetworkmanagementsystemstructureandfunction,andtherealizationoftheaccessnetworkofnetworkmanagement.KEYWORDS:accessnetwork,opticalfibercommunication,PON私立华联学院毕业设计论文-3-目录第1章概论.............................................................................................................-5-1.1接入网发展概述.........................................................................................-5-1.1.1接入网简介.......................................................................................-5-1.1.2接入网的定义....................................................................................-5-1.1.3接入网的物理参考模型....................................................................-6-1.1.4接入网的业务....................................................................................-7-1.2主要接入网技术..........................................................................................-8-1.2.1铜线接入............................................................................................-8-1.2.2光纤接入............................................................................................-8-1.2.3无线接入............................................................................................-8-1.3接入网的发展趋势.....................................................................................-9-1.4论文的主要内容和章节安排....................................................................-10-1.4.1论文的主要内容..............................................................................-10-1.4.2论文章节安排..................................................................................-10-第2章光接入技术.............................................................................................-12-2.1光纤通信简介............................................................................................-12-2.1.1光纤通信的概念..............................................................................-12-2.1.2光纤通信的优点..............................................................................-12-2.2光纤接入技术............................................................................................-13-2.2.1光纤接入FTTx...............................................................................-13-2.2.2光纤接入网的分类..........................................................................-15-2.2.3光纤接入的拓扑结构......................................................................-16-2.3PON技术...................................................................................................-17-2.3.1PON的拓扑结构.............................................................................-17-2.3.2PON技术的标准化.........................................................................-18-2.4光接入网中的复用方式...........................................................................-19-第3章光发送与光接收.......................................................................................-20-3.1天线............................................................................................................-20-3.1.1卡塞格伦天线结构..........................................................................-20-3.1.2天线的性能分析..............................................................................-21-3.1.3无线光接入系统的多孔径天线......................................................-21-3.2光发送单元................................................................................................