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1、武漢科技大學(xué)碩士學(xué)位論文第1頁(yè)摘要無(wú)線Mesh網(wǎng)絡(luò)是一種與傳統(tǒng)無(wú)線網(wǎng)絡(luò)有較大差別的新型無(wú)線網(wǎng)絡(luò)技術(shù),是一種高容量,高速率的分布式網(wǎng)絡(luò),也把它稱作“多跳網(wǎng)絡(luò)"。在網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)上,無(wú)線Mesh網(wǎng)絡(luò)與移動(dòng)Adhoc網(wǎng)絡(luò)相似,但無(wú)線Mesh網(wǎng)絡(luò)大多數(shù)節(jié)點(diǎn)基本靜止不移動(dòng),拓?fù)渥兓?。無(wú)線Mesh網(wǎng)絡(luò)作為一種可以解決無(wú)線接入“最后一公里"瓶頸問(wèn)題的新方案,被寫入到IEEE802.16系列標(biāo)準(zhǔn)和和802.15系列標(biāo)準(zhǔn)中,就目前研究而言,無(wú)線Mesh網(wǎng)絡(luò)是作為未來(lái)無(wú)線城域網(wǎng)最理想方式之一,是構(gòu)建未來(lái)B3G/4G的潛在技術(shù)之一。論文首先介紹了無(wú)線Mesh網(wǎng)
2、絡(luò)的起源,網(wǎng)絡(luò)結(jié)構(gòu),優(yōu)點(diǎn)以及目前遇到的技術(shù)問(wèn)題。接著對(duì)無(wú)線Mesh網(wǎng)絡(luò)的兩種典型路由協(xié)議進(jìn)行了仔細(xì)分析研究,在上述工作基礎(chǔ)上,基于DSR協(xié)議提出了一種改進(jìn)的路由判斷選擇路由協(xié)議。通過(guò)多參數(shù)的路由判據(jù),可以更準(zhǔn)確的反映路由鏈路的情況,同時(shí)在多路徑選擇中加入了改進(jìn)的控制算法,有效的減少路由請(qǐng)求的泛洪。最后利用NS2對(duì)本改進(jìn)協(xié)議進(jìn)行了模擬仿真。仿真結(jié)果表明,本改進(jìn)協(xié)議具有減少丟包率,端到端延時(shí),有效的改善了網(wǎng)絡(luò)的狀態(tài)等優(yōu)點(diǎn),達(dá)到了預(yù)期效果。關(guān)鍵詞:無(wú)線Mesh網(wǎng)絡(luò);路由協(xié)議;DSR;多路徑第1I頁(yè)武漢科技大學(xué)碩士學(xué)位論文AbstractWirel
3、essMeshNetworks.iSanewwirelessnetworktechnologywhichiSquitedifferentwiththetraditionalwirelessnetworks.a(chǎn)lSOknownasmulti.hopnetwork.It’Sonekindofdistributednetworkwithhigh-capacityandhigh-speed.Inthestructureofthene帆orktopology,WirelessMeshiSsimilartotheMobileAdhocnetwork,b
4、utmostofthebasicnodesoftheWirelessMeshnetworkstillanddonotmovenearly,andhavesmallchangesintopology.WirelessMeshNetworksasawirelessaccessCansolvethe”thelastonemile”bottleneckinthenewprogramiswrittenintotheIEEE802.16seriesofstandardsandthe802.15seriesofstandards.Forthecurren
5、tstudies,theWirelessMeshNetwork,isoneofthebestwaysofthefuturewirelessmetropolitanareanetwork,andoneofthepotentialtechnologiesforbuildingthefutureB3G/4G.ThisPapel"firstdescribestheoriginofthewirelessMeshnetworks,networkstructure,advantages,andcurrentlyexperiencedtechnicalpr
6、oblems.ThendetailedanalysisontwotypicalWirelessMeshnetworksroutingprotocolswillbeconducted,basedontheabovework,thePapel"willproposeanimprovedselectionofroutingdeterminetheroutingprotoc01.Throughthemulti—parameterroutingcriteria,thesituationintheroutinglinkCanbemoreaccurate
7、lyreflected.whiletheadditionofimprovedcontrolalgorithmCane硒cientlyreducethefloodingofroutingrequest.Finally,useNS2networktosimulatethisimprovedprotoc01.Simulationresultsshowthat,thisimprovedagreementhavetheadvantagesofreducingpacketlossrate,endtoenddelay,anditCaneffectivel
8、yimprovethestateofthenetwork.a(chǎn)chievedthedesiredresults.Keywords:WirelessMeshnetworks;rout