本文關(guān)鍵詞：面向VANET可靠廣播的協(xié)同背馱算法研究　出處：《計(jì)算機(jī)應(yīng)用研究》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： 協(xié)同背馱 可靠廣播 車輛信息孤島 車載自組織網(wǎng)絡(luò)

【摘要】：道路信號干擾造成的非可靠鏈路使得車載自組織網(wǎng)絡(luò)(vehicular Ad hoc network,VANET)中的廣播消息頻繁發(fā)生數(shù)據(jù)丟包,由于廣播消息中包含與車輛安全相關(guān)的信息,任何數(shù)據(jù)丟包都可能對車輛的安全駕駛造成嚴(yán)重影響。為增強(qiáng)車輛之間信息交互的可靠性,提出了一種貪心背馱算法(greedy piggyback algorithm,GPA)。允許所有車輛在發(fā)送自身丟包請求的同時(shí),從接收緩存中選取若干消息進(jìn)行背馱式附帶廣播,對其他車輛的數(shù)據(jù)丟包進(jìn)行合作恢復(fù)。針對由非對稱信道引起的車輛信息孤島問題,在貪心背馱算法的基礎(chǔ)上提出了一種基于策略學(xué)習(xí)的交互背馱算法(mutual learning and piggybacking algorithm,MLPA),通過車輛之間背馱策略的交互、學(xué)習(xí)提高VANET中消息廣播的可靠性。仿真結(jié)果表明,GPA和MLPA不僅將車輛廣播中數(shù)據(jù)接收的可靠度分別提高到0.85和0.95,還能獲得較低的網(wǎng)絡(luò)負(fù)載和較短的傳輸延遲。該算法可被推廣至其他對實(shí)時(shí)性和可靠性要求較高的無線通信網(wǎng)絡(luò)中。
[Abstract]:The unreliable link caused by road signal interference causes frequent packet loss in broadcast messages in vehicle Ad hoc Network (VANET). Because the broadcast message contains information related to vehicle safety, any data packet loss may have a serious impact on the safe driving of vehicles. In order to enhance the reliability of information interaction between vehicles. A greedy piggyback algorithm gregreedy piggyback algorithm is proposed, which allows all vehicles to send their own packet loss requests at the same time. A number of messages are selected from the receiving cache for piggyback incidental broadcasting to recover the data lost from other vehicles. The problem of isolated island of vehicle information caused by asymmetric channel is addressed. Based on the greedy piggyback algorithm, an interactive piggyback algorithm based on policy learning is proposed. Mutual learning and piggybacking algorithm. The reliability of message broadcasting in VANET can be improved by the interaction of carrier strategy between vehicles. The simulation results show that this method can improve the reliability of message broadcasting in VANET. GPA and MLPA not only increase the reliability of data receiving in vehicle broadcast to 0.85 and 0.95 respectively. The algorithm can be extended to other wireless communication networks with high real-time and reliability requirements.
【作者單位】： 南京林業(yè)大學(xué)汽車與交通工程學(xué)院;南京林業(yè)大學(xué)機(jī)械電子工程學(xué)院;
【基金】：江蘇省高校自然科學(xué)基金資助項(xiàng)目(15KJB580009) 江蘇省自然科學(xué)基金資助項(xiàng)目(BK20130977) 國家自然科學(xué)基金面上項(xiàng)目(11272159)
【分類號】：TN929.5;U495
【正文快照】： 0引言車載自組織網(wǎng)絡(luò)(VANET)是由一定范圍內(nèi)的車輛通過自組織無線通信構(gòu)成的分布式移動(dòng)網(wǎng)絡(luò)[1]。VANET中的各個(gè)車輛通過周期性廣播CAM(cooperative awareness message),實(shí)現(xiàn)鄰近車輛之間運(yùn)行狀態(tài)和道路信息的交互共享。如圖1所示,由于車體對信號的遮擋以及植被綠化的多徑衰落，

本文編號：1406823