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《畢業(yè)設(shè)計(jì)（論文）-無線局域網(wǎng)mac層機(jī)制研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、無錫工藝職業(yè)技術(shù)學(xué)院畢業(yè)設(shè)計(jì)論文設(shè)計(jì)題目：無線局域網(wǎng)MAC研究系部：電子信息系學(xué)生姓名：專業(yè)班級(jí)：計(jì)信（專）081學(xué)號(hào)：指導(dǎo)教師：2011年5月-39-無線局域網(wǎng)MAC層機(jī)制研究摘要：作為計(jì)算機(jī)網(wǎng)絡(luò)和無線通信相結(jié)合的產(chǎn)物，無線局域網(wǎng)WLAN成為了當(dāng)下日益流行的無線接入方式。IEEE802.11標(biāo)準(zhǔn)是國(guó)際普遍認(rèn)可的無線局域網(wǎng)標(biāo)準(zhǔn)，它能很好的支持?jǐn)?shù)據(jù)業(yè)務(wù)的傳輸，占有較大的市場(chǎng)份額。無線局域網(wǎng)MAC層是控制和協(xié)調(diào)無線節(jié)點(diǎn)訪問網(wǎng)絡(luò)介質(zhì)的關(guān)鍵協(xié)議子層。如何在有限的網(wǎng)絡(luò)資源和不穩(wěn)定的物理介質(zhì)的前提下在MAC層提供有效服務(wù)，成了無
2、線網(wǎng)絡(luò)研究界的一個(gè)新課題。在這個(gè)技術(shù)背景下，本文針對(duì)IEEE802.11無線局域網(wǎng)系統(tǒng)的媒體接入(MAC:MediaAccessControl)層支持技術(shù)進(jìn)行了研究。在分析了IEEE802.11協(xié)議的基礎(chǔ)上，對(duì)最初的兩種接入機(jī)制PCF和DCF做了一定的描述。本文不僅對(duì)EDCF（EnhancedDistributedChannelAccess）和HCF的協(xié)議原理做了詳細(xì)的介紹，而且還將它們分別與DCF和PCF的性能做了比較。并且還在論文的最后對(duì)無線局域網(wǎng)MAC層機(jī)制提出了改進(jìn)方案。關(guān)鍵詞：無線局域網(wǎng);WLAN;服務(wù)質(zhì)量
3、MAC層-39-WirelessLANMAClayerTechnologyAsacomputernetworkandthecombinationofthewirelesscommunication,wirelessLANWLANbecamepresentincreasinglypopularwirelessaccessmode.InternationalstandardiswidelyacceptedbyIEEE802.11thewirelesslocalareanetworkstandard,itcanbeaver
4、ygoodsupportdatabusinesstransmission,occupythebiggermarketshare.WirelessLANMAClayeriscontrolandcoordinationofthewirelessnetworkmedianodevisitkeyagreementsonlayer.HowinthenetworkresourcesandlimitedthephysicalmediainstabilityintheMAClayerunderthepremiseofprovidee
5、ffectiveservices,becameawirelessnetworkissue41"anewsubject.Inthistechnicalbackground,basedonthewirelesslocalareanetworksystemIEEE802.11MediaAccess(MAC:MediaAccessControl)layersupporttechnologyisstudied.OntheanalysisonthebasisofIEEE802.11agreementtothefirsttwo,P
6、CFaccessmechanismanddonesomedescriptionDCFmodel.ThispapernotonlyEDCF(DistributedtoanyAccess)andtotheprincipleofagreementHCFdescribedindetail,andwilltheyrespectivelywiththeperformanceofPCFDCFmodelandwerecompared.Andalsoinpaperfinallytothewirelesslocalareanetwork
7、MAClayermechanismpresentstheimprovementplan.Keywords:wirelessLANWLANservicequalityMAClayer-39-目錄前言5第一章緒論71.1無線局域網(wǎng)概述71.2無線局域網(wǎng)的基本概念81.3無線局域網(wǎng)特點(diǎn)91.4無線局域網(wǎng)的組成原理111.5無線局域網(wǎng)的協(xié)議體系131.6無線局域網(wǎng)的應(yīng)用與發(fā)展趨勢(shì)16第二章IEEE802.11物理層和MAC層規(guī)范182.1IEEE802.11物理層結(jié)構(gòu)182.1.1IEEE802.11物理層概念182.1.2
8、IEEE802.11物理層層次結(jié)構(gòu)182.1.3IEEE802.11物理層分類202.1.4IEEE802.11物理層協(xié)議202.1.5IEEE802.11物理層關(guān)鍵技術(shù)212.2IEEE802.11MAC層結(jié)構(gòu)222.2.1IEEE802.11MAC層概念222.2.2IEEE802.11MAC協(xié)議23結(jié)論34參考文獻(xiàn)35-39-附錄36致謝
