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1、第25卷第3期傳感技術(shù)學(xué)報(bào)Vo1.25No.32012年3月CHINESEJOURNALOFSENSORSANDACFUATORSMar.2012LifetimeOptimizedRoutingAlgorithmBasedonShortestPathTreeCHENYourong,WANGZhangquan,CHENGJuhua,LIUYaolin(CollegeofInformationScienceandTechnology,ZhejiangShurenUniversity,Hangzhou310015,China)Abstract:Toprolongth
2、elifetimeofwirelesssensornetwork,lifetimeoptimizedroutingalgorithmbasedonshortestpathtree(LORA—SPT)isproposed.Theconceptofnodeclassificationisintroduced.Theweightfunctionisestablishedwithlinkenergyconsumptionfactor,residualenergyfactorofownnodes,residualenergyfactorofneighbornodesan
3、dtypeweightfactor.Differenttypesofnodesusedifferenttypeweightfactors.Finally,dijkstraalgorithmisusedtoconstructtheshortestpathtree.Allnodestransmitdataalongtheshortestpathtreetosinknode.Simulationresultsshowthatbyadjustingthefourfactorsofweightfunction,LORA—SPTalgorithmcanprolongnet
4、worklifetime,balanceenergyconsumptionofeachnode,remainnodeaverageenergyconsumptionatalowlevelandreducenetworklatencytime.Undercertainconditions,LORASPTalgorithmoutperformsPEDAPPA,LET,——SumWandRatiowalgorithms.——Keywords:wirelesssensornetworks;optimizingnetworklifetime;shortestpathtr
5、ee;residualenergyEEACC:6150Pdoi:10.3969/j.issn.1004—1699.2012.03.026基于最短路徑樹的優(yōu)化生存時(shí)間路由算法術(shù)陳友榮,王章權(quán),程菊花,劉耀林(浙江樹人大學(xué)信息科技學(xué)院,杭州310015)摘要:為提高無線傳感網(wǎng)的生存時(shí)間,提出基于最短路徑樹的優(yōu)化生存時(shí)間路由算法(LORA—SPT)。該算法引入節(jié)點(diǎn)分類概念,構(gòu)造基于鏈路能耗因子、自身節(jié)點(diǎn)剩余能量因子、鄰居節(jié)點(diǎn)剩余能量因子和類型權(quán)重因子等多個(gè)因子的權(quán)值函數(shù)。針對(duì)不同類型的節(jié)點(diǎn)采用不同的權(quán)重因子,最后利用dijkstra算法完成最短路徑樹,所有節(jié)點(diǎn)沿著最
6、短路徑樹將數(shù)據(jù)發(fā)送給Sink節(jié)點(diǎn)。仿真結(jié)果表明:通過調(diào)整權(quán)值函數(shù)的四個(gè)因子,可以延長網(wǎng)絡(luò)生存時(shí)間,均衡各個(gè)節(jié)點(diǎn)的能耗,將節(jié)點(diǎn)平均能耗保持在較低的水平,降低網(wǎng)絡(luò)平均時(shí)延。在一定的條件下,LORA—SPT算法比PEDAP—PA、LET、Sum—W和Ratio—W算法更優(yōu)關(guān)鍵詞:無線傳感網(wǎng);優(yōu)化生存時(shí)間;最短路徑法:剩余能量中圖分類號(hào):TP393文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1004—1699(2012)03—0406—07在大部分情況下無線傳感網(wǎng)的所有節(jié)點(diǎn)采用電可用能量持續(xù)的時(shí)間更長,從而延長網(wǎng)絡(luò)生存時(shí)間;池供電,被部署在無人看守的惡劣環(huán)境中。而且節(jié)平衡節(jié)點(diǎn)能耗,避免網(wǎng)
7、絡(luò)樞紐節(jié)點(diǎn)因自身能量消耗點(diǎn)分布密集、數(shù)量龐大,對(duì)電池的更換是非常困難過快而縮短網(wǎng)絡(luò)生存時(shí)間。文獻(xiàn)[5]提PEDAP的,因此節(jié)點(diǎn)存在嚴(yán)重的能量約束¨J電池不能(powereficientdatagatheringandaggregationprotoco1)補(bǔ)充和更換.一旦節(jié)點(diǎn)能量耗盡,該節(jié)點(diǎn)就會(huì)失效,和PEDAP—PA(powereficientdatagatheringand這將影響到網(wǎng)絡(luò)的運(yùn)行,甚至導(dǎo)致網(wǎng)絡(luò)出現(xiàn)分裂而aggregationprotocol—poweraware),都是基于最小權(quán)縮短網(wǎng)絡(luò)生存時(shí)間。因此,無線傳感網(wǎng)的各個(gè)算法重樹的路由算法。在算
8、法中,定義了基于鏈路能耗都要從節(jié)能出發(fā)