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1、分類號(hào):TP393密級(jí):UDC:004.7學(xué)校代碼:11065碩士學(xué)位論文AdHoc網(wǎng)絡(luò)QoS多徑路由協(xié)議研究段冬梅指導(dǎo)教師賈小珠教授學(xué)科專業(yè)名稱計(jì)算機(jī)科學(xué)與技術(shù)論文答辯日期2016年6月2日摘要移動(dòng)Adhoc網(wǎng)絡(luò)(MobileAdHocNetwork,MANET)是由一組移動(dòng)節(jié)點(diǎn)組成的一種多跳、自組織的無(wú)線通信網(wǎng)絡(luò),主要用于應(yīng)急救援、軍事通信等領(lǐng)域,從而對(duì)時(shí)延、帶寬、穩(wěn)定性等QoS保障需要較高的要求。如何利用有效資源尋找相對(duì)穩(wěn)定的路由,對(duì)實(shí)現(xiàn)數(shù)據(jù)的可靠傳輸具有重要作用。因此本文對(duì)QoS保障和路由可靠性進(jìn)行深入研究,在AODV路由協(xié)議的基礎(chǔ)上提出了改
2、進(jìn)的Q-AODV和MQ-AODV路由協(xié)議。首先,提出基于QoS約束的AODV路由協(xié)議Q-AODV,該協(xié)議在尋找可用路由的過程中,考慮帶寬和能量的瓶頸節(jié)點(diǎn),并根據(jù)路徑的帶寬、能量和跳數(shù)參數(shù)構(gòu)造綜合代價(jià)函數(shù),選擇綜合代價(jià)函數(shù)值最大的路徑傳輸數(shù)據(jù)。其次,在Q-AODV路由協(xié)議的基礎(chǔ)上,提出了MQ-AODV路由協(xié)議,該協(xié)議分析了單徑和多徑路由的優(yōu)缺點(diǎn),利用綜合代價(jià)函數(shù)尋找多條節(jié)點(diǎn)不相關(guān)的路徑,源節(jié)點(diǎn)根據(jù)綜合代價(jià)函數(shù)值的大小分配數(shù)據(jù)流量后同時(shí)傳輸數(shù)據(jù)。并且只在所有路徑都斷裂后才啟動(dòng)路徑重建過程,當(dāng)一條路徑斷裂時(shí),源節(jié)點(diǎn)重新分配其它路徑的數(shù)據(jù)流量繼續(xù)傳輸數(shù)據(jù)。最
3、后,使用NS2仿真實(shí)驗(yàn),對(duì)Q-AODV協(xié)議、MQ-AODV協(xié)議和AODV路由協(xié)議的分組投遞率、平均端到端時(shí)延和網(wǎng)絡(luò)生存時(shí)間的性能進(jìn)行評(píng)價(jià)。通過分析比較Q-AODV、MQ-AODV與AODV路由協(xié)議的模擬結(jié)果,證明改進(jìn)的路由協(xié)議可以有效提高分組投遞率、減少平均端到端時(shí)延和增加網(wǎng)絡(luò)生存時(shí)間,進(jìn)而提升網(wǎng)絡(luò)整體性能。關(guān)鍵詞:AdHoc網(wǎng)絡(luò);AODV;可用帶寬;能量;多路徑AbstractMobileAdhocNetwork(MobileAdhocNetwork,MANET)isakindofmulti-hopandself-organizedwireless
4、communicationNetworkcomposedofmobilenodes.Ithasbeenmainlyusedforemergencyrescue,militarycommunicationsandotherfields,sogreaterdemandsarebeingplacedontheQoSguaranteesincludingtimedelay,bandwidth,andstabilityandsoon.Infact,howtofindarelativelystableroutingwitheffectiveresourcespl
5、aysanimportantroleinrealizingreliabledatatransmission.Sointhispaper,itmadeanintensivestudyontheQoSguaranteesandroutingreliability,andproposedtheimprovedQ-AODVandMQ-AODVroutingprotocolbasedontheAODVroutingprotocol.Firstly,theAODVroutingprotocolcalledQ-AODVbasedontheQoSconstraint
6、swasproposed.Itwillfullyconsiderthebottlenecknodesofbandwidthandenergy,andthenconstructthecomprehensivecostfunctionaccordingtotheparametersincludingbandwidth,energyandhopofpaths,andfinallychoosethepathofthemaximumvalueofthecomprehensivecostfunctiontotransmitdatawhenitsearchesfo
7、ravailablerouting.Secondly,theMQ-AODVroutingprotocolwasproposedonthebasisoftheQ-AODVroutingprotocol.Itwillanalyzetheadvantagesanddisadvantagesofsingle-pathroutingandmulti-pathrouting,andlookformultiplepathsofunrelatednodeswithcomprehensivecostfunction,thenthesourcenodeswilltran
8、smitdataatthesametimeafterthedatatrafficisassignedacco