【摘要】：車輛自組織網(wǎng)絡(luò)中的空分復(fù)用接入方案可有效地提高網(wǎng)絡(luò)吞吐量與傳遞效率,但其具有節(jié)點(diǎn)隱藏的問題,對(duì)此提出了一種根據(jù)車輛密度自適應(yīng)調(diào)節(jié)空分復(fù)用距離的控制算法。首先,每個(gè)車輛估算本地車輛密度,并與鄰居車輛進(jìn)行分布式的融合;然后,車輛根據(jù)車輛密度動(dòng)態(tài)地調(diào)節(jié)空分復(fù)用距離,從而降低節(jié)點(diǎn)隱藏引起的信號(hào)干擾與數(shù)據(jù)包沖突;最終,使得空分復(fù)用距離與數(shù)據(jù)包接收率達(dá)到平衡。在每個(gè)蜂窩中,使用同步傳輸來提高空間與帶寬的利用效率。仿真實(shí)驗(yàn)結(jié)果表明,該算法有效地降低了數(shù)據(jù)包沖突,提高了車輛自組織網(wǎng)絡(luò)中空分復(fù)用接入方案的數(shù)據(jù)包傳遞率,并降低了端到端延遲。
[Abstract]:The spatial division multiplexing (SDDM) access scheme in vehicle ad hoc networks can effectively improve the throughput and transmission efficiency of the network, but it has the problem of node concealment. In this paper, an adaptive control algorithm is proposed to adjust the space division multiplexing distance according to the vehicle density. First of all, each vehicle estimates the local vehicle density and carries on the distributed fusion with the neighbor vehicle, then, the vehicle dynamically adjusts the space division multiplexing distance according to the vehicle density, thus reduces the signal interference caused by the node hiding and the packet collision. Finally, the space division multiplexing distance is balanced with the packet receiving rate. In each cell, synchronous transmission is used to improve space and bandwidth efficiency. The simulation results show that the proposed algorithm can effectively reduce the packet collision, improve the packet transfer rate and reduce the end-to-end delay.
【作者單位】： 梧州學(xué)院廣西高校行業(yè)軟件技術(shù)重點(diǎn)實(shí)驗(yàn)室;梧州學(xué)院信息與電子工程學(xué)院;武漢科技大學(xué)計(jì)算機(jī)科學(xué)與技術(shù)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(61502343) 廣西自然科學(xué)基金(2015GXNSFAA139295,2013GXNSFBA019275,2013GXNSFBA019276) 梧州市科技開發(fā)項(xiàng)目(2015A03006) 廣西高�？蒲许�(xiàng)目(2013YB227、2013YB228) 武漢科技大學(xué)青年科研骨干基金(2014XZ017)
【分類號(hào)】：TN929.5;U495
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本文編號(hào)：2365960