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1、144傳感器與微系統(tǒng)(TransducerandMicrosystemTechnologies)2015年第34卷第4期DOI:10.13873/J.1000--9787(2015)04--0144--04一種基于模糊邏輯的自適應(yīng)信標(biāo)交換算法李玉龍,戚云軍,張衡陽(yáng)(空軍工程大學(xué)信息與導(dǎo)航學(xué)院。陜西西安710077)摘要:針對(duì)移動(dòng)無(wú)線傳感器網(wǎng)絡(luò)中貪婪地理路由協(xié)議采用固定信標(biāo)周期導(dǎo)致通信暫盲的問(wèn)題,提出了一種基于模糊邏輯的自適應(yīng)信標(biāo)交換算法。該算法以節(jié)點(diǎn)移動(dòng)速度、節(jié)點(diǎn)剩余能量和鄰居節(jié)點(diǎn)的數(shù)量作為評(píng)價(jià)因素,利用模糊邏輯控制機(jī)制確定自適應(yīng)的信標(biāo)周期,提高了鄰居
2、表構(gòu)建與維護(hù)的準(zhǔn)確性與實(shí)時(shí)性,為貪婪地理轉(zhuǎn)發(fā)提供了可靠依據(jù)。仿真結(jié)果表明:該算法有效減少了通信暫盲現(xiàn)象,降低了控制開(kāi)銷和平均端到端時(shí)延,提高了分組交付率,適用于對(duì)傳輸可靠性要求高的大規(guī)模移動(dòng)無(wú)線傳感器網(wǎng)絡(luò)。關(guān)鍵詞:移動(dòng)無(wú)線傳感器網(wǎng)絡(luò);貪婪地理路由;鄰居節(jié)點(diǎn)表;信標(biāo)交換;模糊邏輯中圖分類號(hào):TP393文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1000-9787(2o15)04--0144--04AnadaptivebeaconexchangealgorithmbasedonfuzzylogicUYu—long,QIYun-jun,ZHANGHeng—yang(School
3、ofInformationandNavigation,AirForceEngineeringUniversity,Xi’an710077,China)Abstract:Aimingatproblemthattemporarycommunicationblindnesscausedbygreedygeographicalroutingprotocoladoptsstationarybeaconexchangeinmobilewirelesssensornetworks(WSNs),anoveladaptivebeaconexchangealgorithm
4、isproposed.Thealgorithmadoptsnodemovingspeed,noderesidualenergy,numberofneighboringnodesasevaluationfactorsandconfirmadaptivebeaconpefodusingfuzzylogiccontrolmechanism.Theadaptivebeaconexchangealgorithmcanincreaseaccuracyandreahimeofneighborstableconstructionandmaintenanceandpro
5、videreliablebasisforgreedygeographicalrelay.Simulationshowsthattheproposedalgorithm.reducephenomenonoftemporarycommunicationblindness,increasespacketdeliveryratioandreduceaverageend—to—enddelayaswellascontroloverhead,SOitissuitableforapplicationoflarge—scalemobileWSNs,whichhashi
6、ghrequirementfortransmissionreliability.Keywords:mobilewirelesssensornetworks;greedygeographicalrouting;neighbornodetable;beaconexchange;fuzzylogic0引言點(diǎn)鏈路的改變率來(lái)調(diào)整信標(biāo)發(fā)送的比率,而該機(jī)制中用大在移動(dòng)傳感器網(wǎng)絡(luò)中,構(gòu)建高效的路由算法一直是被量的固定值和閾值計(jì)算鏈路改變率,不適用于動(dòng)態(tài)地?zé)o線廣泛關(guān)注的內(nèi)容。隨著定位技術(shù)的發(fā)展,貪婪地理路由協(xié)自組網(wǎng)。HeissenbuttelM等人提出了兩種信標(biāo)交換算議
7、成為了研究的熱點(diǎn)。但固定周期的信標(biāo)交換算法應(yīng)用于法:1)依據(jù)距離,與HuangCJ等人提出的策略有同樣的移動(dòng)環(huán)境中會(huì)產(chǎn)生通信暫盲的問(wèn)題,嚴(yán)重影響數(shù)據(jù)傳輸缺點(diǎn)就是用固定距離來(lái)計(jì)算信標(biāo)發(fā)送時(shí)刻;2)依據(jù)速度,的可靠性。針對(duì)該問(wèn)題,ChenQ等人基于節(jié)點(diǎn)預(yù)測(cè)位置節(jié)點(diǎn)移動(dòng)速度快的比慢的發(fā)送信標(biāo)頻繁。誤差提出了APU(adaptivepositionupdate)策略,但靜態(tài)的上述算法從不同程度上克服了固定周期信標(biāo)交換算法誤差值影響了APU策略的性能。XiangX等人提出了的缺點(diǎn),但都沒(méi)有依據(jù)節(jié)點(diǎn)移動(dòng)性、節(jié)點(diǎn)剩余能量和鄰居節(jié)SOGR(self-adaptiveo
8、n—demandgeographicrouting)協(xié)議,實(shí)點(diǎn)數(shù)量的改變自適應(yīng)地廣播信標(biāo),然而