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Cooperative vehicular communications at intersections over Nakagami-m fading channels

机译:Nakagami-m衰落信道交叉口的合作车辆通信

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In this paper, we study vehicular communications (VCs) at road intersections. We investigate three transmission schemes: direct transmissions (DT), relay transmissions (RT) and hybrid transmissions (HT), in the presence of interference. We model the interferer vehicle locations as a Poisson point process. Using tools from stochastic geometry, we compute the outage probability for the three transmission schemes considering Nakagami-m fading channels. We consider line of sight (LOS) scenarios and nonline of sigh (NLOS) scenarios. We derive the outage probability when the receivers are on the roads (as a vehicle), or outside the roads (as an infrastructure). We show that RT is useful only when DT is not possible. We also show that, in LOS scenario, DT is better for high densities of vehicles. We show that HT has better performance for low densities of vehicles and low data rates regardless of the scenario considered. Surprisingly, we find that NLOS scenarios outperform LOS scenarios at intersections. Finally, we show that the best relay position in RT is at mid-distance between the source and the destination whereas the best relay in HT is close to the destination. Analytical results are validated by Monte-Carlo simulations. (C) 2019 Elsevier Inc. All rights reserved.
机译:在本文中,我们研究了道路交叉口的车辆通信(VC)。在存在干扰的情况下,我们研究了三种传输方案:直接传输(DT),中继传输(RT)和混合传输(HT)。我们将干扰车辆的位置建模为泊松点过程。使用来自随机几何的工具,我们考虑了Nakagami-m衰落信道,计算了三种传输方案的中断概率。我们考虑视线(LOS)场景和非叹息线(NLOS)场景。当接收器在道路上(作为车辆)或在道路外(作为基础设施)时,我们得出中断概率。我们证明RT仅在不可能使用DT时才有用。我们还表明,在LOS场景中,DT对于高密度车辆更佳。我们表明,无论考虑哪种方案,HT在低密度车辆和低数据率方面都具有更好的性能。令人惊讶的是,我们发现在交叉路口,NLOS方案优于LOS方案。最后,我们证明RT中的最佳中继位置在源与目标之间的中间距离,而HT中的最佳中继则靠近目标。分析结果通过蒙特卡洛模拟验证。 (C)2019 Elsevier Inc.保留所有权利。

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