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基于密度和距離的多跳廣播轉發(fā)節點(diǎn)選擇方案
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河南牧業(yè)經(jīng)濟學(xué)院 軟件學(xué)院,河南牧業(yè)經(jīng)濟學(xué)院 信息與電子工程系

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河南省教育廳2015年度《河南省高等學(xué)校重點(diǎn)科研項目計劃》(15A520077)


Density-distance based multi-hop broadcast forwarder selection scheme in VANET
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Software Institute Henan University of Animal Husbandry and Economy,ZhengZhou Henan, China,Department of Information Electronic Engineering Henan University of Animal Husbandry and Economy,ZhengZhou Henan

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    摘要:

    多數車(chē)聯(lián)網(wǎng)VANET(Vehicular Ad Hoc Network)的安全應用均采用多跳廣播方式分發(fā)安全消息。現已提出了許多的多跳廣播轉發(fā)節點(diǎn)選擇方案,但它們以減少轉發(fā)節點(diǎn)數為目的。為此,提出基于密度和距離的多跳廣播轉發(fā)節點(diǎn)選擇方案DDBFS(Density-Distance based multi-hop Broadcast Forwarder Selection scheme),記為DDBFS。DDBFS方案主要解決兩個(gè)問(wèn)題:密集區域的冗余廣播和稀疏區域的高的傳輸時(shí)延。在提出的DDBFS方案中,節點(diǎn)在決策是否轉播接收的消息前,依據距離和網(wǎng)絡(luò )密度設置定時(shí)器,一旦定時(shí)完畢,且在定時(shí)期間,沒(méi)有其他節點(diǎn)轉發(fā)該消息,該節點(diǎn)就成為下一跳轉發(fā)節點(diǎn)。仿真結果表明,與現有的方案相比,提出的DDBFS協(xié)議在重播次數和傳輸時(shí)延性能得到顯著(zhù)提高。在密集區域,消息重播次數下降了約57%,在稀疏區域,傳輸時(shí)延縮短了約82%。

    Abstract:

    Most VANET (Vehicular Ad Hoc Network) safety applications use multi-hop broadcast communications to disseminate safety information. Many multi-hop broadcast forwarder selection schemes have been proposed. Their aim is to reduce the number of forwarders. In this paper, we propose a density-distance based multi-hop t forwarder selection scheme (DDBFS) to address the problems of (i) redundant broadcasts particularly in dense network and (ii) the high latency in sparse networks. We present a solution where both the distance and the network density are considered in calculating the waiting time before deciding whether to rebroadcast received messages or not. Once the waiting time is over and the messages have been not forwarded by other nodes, the node is considered as to be next-hop node. Simulation results show that our scheme achieves better performance in terms of number of rebroadcasts and dissemination delay compared to existing solutions. Our protocol results in improvement up to 57% in message rebroadcast when the network density is high, and 82% in dissemination delay when the network is sparse.

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張浩,王桂芝.基于密度和距離的多跳廣播轉發(fā)節點(diǎn)選擇方案計算機測量與控制[J].,2016,24(8):45.

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  • 收稿日期:2016-03-01
  • 最后修改日期:2016-03-25
  • 錄用日期:2016-03-25
  • 在線(xiàn)發(fā)布日期: 2016-08-18
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