毕业设计论文企业无线局域网的规划设计

专科毕业设计论文题目企业无线局域网的规划设计学院安徽财贸职业学院专业计算机应用技术学生姓名*******导师姓名****ABSTRACT摘要随着以太网的广泛应用，因特网的日益普及，以及移动终端的不断增加，人们日常的生活、办公对移动IP接入的需求迅速增长。无线局域网WLAN（WirelessLocalAreaNetwork）作为有线以太网的延伸，一定程度上满足了这种需求。无线局域网采用射频技术构成局域网络,是一种便利的数据传输系统。由于无线局域网设备一般工作于免授权频段，在频段的使用上无需高昂的许可费用，加之WLAN技术的日趋成熟，使得WLAN的应用已经从单纯的有线网络的延伸拓展开来，成为小区尤其是热点地区重要的高速无线数据接入手段之一，应用潜力巨大。同时WLAN的先期部署将促进移动数据业务需求的增长和相关业务应用的成熟。今天，无线局域网的应用范围已经非常广泛，尤其是企业，随着人们对移动办公、高速工作效率的需求，使用无线网络必不可少。可以预见，凭借无线接入技术本身具有的应用灵活、安装速度快、建设周期短等优势，以及地理应用环境的无限制特性，WLAN必将作为一种高速无线数据接入手段与有线网络一起，构成灵活、高效、完善的宽带网络。关键词：无线局域网WLAN技术原理WLAN的规划设计摘要ABSTRACTWiththeextensiveapplicationofEthernet,theincreasingpopularityoftheInternet,andmobileterminalscontinuetoincrease,peopledailylife,officemobileIPaccessontherapidlygrowingdemand.WirelessLANWLAN(WirelessLocalAreaNetwork)asanextensionofwiredEthernet,toacertainextenttomeetthisdemand.WirelessLocalAreaNetworkconstitutesalocalareanetworkusingradiofrequencytechnology,isaconvenientdatatransmissionsystem.AswirelessLANdevicesgenerallyworkintheunlicensedbands,inthebandwithouttheuseofhighlicensefees,combinedwithWLANtechnologyhasmatured,makingWLANapplicationshasgrownfromasimpleextensionofwirednetworksopenup,becomeespeciallyhotcellregionisanimportantmeansofhigh-speedwirelessdataaccess,applicationpotential.TheearlydeploymentofWLANwillalsopromotethegrowthofdemandformobiledataservicesandrelatedbusinessapplicationsmature.Today,wirelesslocalareanetworkhasaverywiderangeofapplications,particularlyinbusiness,aspeoplemoveoffice,thedemandforhighefficiency,theuseofwirelessnetworksisessential.Canbeexpected,withwirelessaccesstechnologyitselfistheapplicationofaflexible,quickinstallation,shortconstructionperiod,advantages,andapplicationenvironmentofunlimitedgeographicfeatures,WLANwillasahigh-speedwirelessdataaccesstools,togetherwiththewirednetwork,constituteaflexible,efficient,improvethebroadbandnetwork.Keywords:WLANWLANtechnologyWLANplanninganddesignprinciples目录i目录第一章绪论.....................................................31.1无线局域网的概述............................................31.1.1概念....................................................31.1.2采用非专用频段.........................................41.2无线局域网的特点............................................6第二章无线局域网的技术原理......................................82.1无线局域网的标准............................................82.1.1IEEE802.11.............................................82.1.1.1IEEE802.11b........................................92.1.1.2IEEE802.11a........................................92.1.1.3IEEE802.11g........................................92.1.1.4IEEE802.11n.......................................102.1.2IEEE802.11e协议........................................102.1.2.1概述...............................................102.1.2.2IEEE802.11MAC协议.................................102.1.2.3IEEE802.11e的EDCF机制............................112.2无线局域网的关键技术.......................................112.2.1IEEE802.11无线局域网的物理层关键技术...................122.2.1.1DSSS调制技术......................................122.2.1.2PBCC调制技术......................................122.2.1.3OFDM技术..........................................122.2.1.4MIMO+OFDM技术......................................142.2.2无线局域网的数据链路层关键技术.........................162.2.2.1无线局域网的MAC子层工作方式.......................172.3无线局域网的主要设备和拓扑结构.............................212.3.1主要设备介绍...........................................21ii目录2.3.2拓扑结构................................................232.4无线局域网的应用............................................292.5企业无线局域网组建的建议....................................32第三章需求分析.................................................353.1企业情景介绍................................................353.2需求分析....................................................35第四章解决方案.................................................354.1网络现状....................................................354.2无线网络信号覆盖要求分析与设计..............................364.3采用多AP微蜂窝无线覆盖.....................................374.4具体接入点规划图............................................374.4.1楼宇内部的接入点规划....................................384.4.2户外楼宇间照射规划与部署................................384.4.3户外公共场所照射规划与部署..............................394.5无线网络结构规划............................................394.6用户安全接入认证规划........................................404.7方案总结....................................................42第五章结束语...................................................435.1关于无线技术可能的创新与不足................................435.1.1不足....................................................435.1.2创新....................................................435.2总结......................................................44致谢语.........................................................45参考文献.........................................................47第二章无线局域网的技术原理3第一章绪论1.1无线局域网的概述在20世纪，计算机和互联网在处理与传输数据上起到了革命性的作用。现在，无处不在、无时不在的无线技术将会使21世纪成为以无线网格为标志的第二个信息世纪。随着社会经济迅速发展，互联网与无线通信技术的融合，人们对网络的认识与要求也随之变高。高速率，高性能和兼容性已成为人们的普遍要求，对随时随地进行通信和信息服务的需求变得迫切。现有的有线网络在某种程度上已不能满足需求，因此，无处不在的网络终端，以个人为主，无线化、智能化的移动通信以及快捷方便的无线接入，无线互联等众多适应当前需