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1、西安電子科技大學(xué)碩士學(xué)位論文WSNs中基于網(wǎng)絡(luò)編碼的機(jī)會(huì)路由協(xié)議研究姓名:王利敏申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):計(jì)算機(jī)軟件與理論指導(dǎo)教師:武波2011-01摘要路由協(xié)議作為無(wú)線傳感器網(wǎng)絡(luò)核心技術(shù)之一,它的性能直接影響整個(gè)網(wǎng)絡(luò)的運(yùn)行效率。機(jī)會(huì)路由通過(guò)一種路由推遲策略充分利用了無(wú)線信道的廣播特性,可以有效提高無(wú)線網(wǎng)絡(luò)的傳輸可靠性和端到端的吞吐率。網(wǎng)絡(luò)編碼允許節(jié)點(diǎn)在轉(zhuǎn)發(fā)信息前對(duì)輸入信息進(jìn)行編碼,可以提高網(wǎng)絡(luò)的吞吐量、均衡網(wǎng)絡(luò)負(fù)載、提升帶寬利用率。本文將機(jī)會(huì)路由和網(wǎng)絡(luò)編碼兩種技術(shù)結(jié)合在一起,提出了一種融入了網(wǎng)絡(luò)編碼的機(jī)會(huì)多徑路由協(xié)議。本文在保證數(shù)據(jù)傳輸可靠性的前提
2、下,以提高無(wú)線傳感器網(wǎng)絡(luò)的數(shù)據(jù)傳輸效率和節(jié)點(diǎn)能量效率為目標(biāo),首先提出了一種基于局部拓?fù)湫畔⒌臋C(jī)會(huì)多徑路由協(xié)議LTIOP,然后融入網(wǎng)絡(luò)編碼,設(shè)計(jì)實(shí)現(xiàn)了一種基于網(wǎng)絡(luò)編碼的機(jī)會(huì)多徑路由協(xié)議NCMOR。NCMOR允許多個(gè)數(shù)據(jù)段同時(shí)在網(wǎng)絡(luò)中傳輸,并在信源節(jié)點(diǎn)通過(guò)設(shè)置發(fā)送窗口來(lái)對(duì)流量進(jìn)行控制,以提高網(wǎng)絡(luò)的吞吐率。最后,本文在TinyOS上用nesC語(yǔ)言實(shí)現(xiàn)了協(xié)議LTIOP和NCMOR,并在構(gòu)造的隨機(jī)網(wǎng)絡(luò)拓?fù)渖希梅抡婀ぞ逿OSSIM完成了仿真實(shí)驗(yàn)。結(jié)果證明協(xié)議NCMOR在控制開(kāi)銷(xiāo)不大的情況下,減少了網(wǎng)絡(luò)發(fā)包數(shù)和數(shù)據(jù)傳輸時(shí)延,提高了網(wǎng)絡(luò)的吞吐量和能量效率。關(guān)鍵詞
3、:無(wú)線傳感器網(wǎng)絡(luò)路由協(xié)議網(wǎng)絡(luò)編碼機(jī)會(huì)路由NC—MORAbstractRoutingprotoc01isthecoretechnologyofwirelesssensornetworks,whoseDemmancedirectlyaffectstheefficiencyoftheentirenetwork·opponums‘1crou‘mgcallsi觚fic砌yincreasestransmissionreliabilityandendtoendthroughputmwlrelessnetWorksbVeffectivelyutilizingthe
4、wirelessbroadcastmedlumwithroutingdelaystrategy.Networkcodingthatallownodetoencodethe1nputIntomatlonbeforefonⅣardcanincreasethroughput,balancenetworkloadand1mproVethebandwidthutilization.Thispaper,combiningabovetwotechnologies,proposesanewmultipathopportunisticroutingprotocoli
5、ntegratingnetworkcodingforwlrelesssensornetworks.Underthepremiseofguaranteeingtransmissionreliability,increasingdatatransmissionefficiencyandenergyefficiencyisthispaper’sgoal·A舢ltlpatnopportunisticroutingprotocolbasedonlocaltopologyinformation(LTIOP)hasbeenDresentedfistly.Onth
6、isbasis,NCMOR,anewprotocolthatusesnetWorkcodlnglnmultipathopportunisticroutinghasbeendesigned.Bytransmiringawindowotmultiplese舯entsCOncurrently,itimrIrovesthethroughput。fn洲。rk·Finally,protocolLTI—OPandNC—MORhasbeenimplementedbYpro鏟ammmgwithnesCinTinyOS.WiththeTOSSIMsimulationp
7、latform,ithascompletedseVeralsimulationsinagivennetworktopology.Theresultsshowsthat,NC—MORcanreducetransmissionpacketsandreceivingdelay,improvethroughputalldene‘gYetiticlencYwitll(1utmuchmorecontroloverheard.Keywords:WirelessSensorNetworksRoutingProtocolNetworkCodingOpportunis
8、ticRoutingNC——MOR第一章緒論傳感器作為獲取現(xiàn)實(shí)世界信息的一種重要工具,使人類(lèi)認(rèn)識(shí)現(xiàn)實(shí)世界的觸手伸的更遠(yuǎn),使