Vehicular safety communications (VSCs) provide relevant solutions to avoid congestion and road accidents, more particularly at road intersections since these areas are more prone to accidents. In this context, one of the main impairments that can affect the performance of VSCs is interference. In this paper, we study the performance of cooperative transmissions at intersections in presence of interference for VSCs. We use tools from stochastic geometry, and model interferer vehicles locations as a Poisson point process. First, we calculate the outage probability for a direct transmission when the receiving nodes can be on the road (as vehicles), or outside the road (as infrastructures). Then, we analyze the outage probability performance of a cooperative transmission scheme. The analysis takes into account two dimensions: the decoding strategy at the receiving nodes, and the vehicles mobility. We determine the optimal relay position under different traffic densities and for different vehicles mobility models. We also show that the outage probability does not improve after the number of infrastructure relays reach a threshold value. Finally, we show that the outage probability performance of VSCs is higher at intersections than on highways. We validate our analytical results by Monte-Carlo simulations.

车辆安全通信 (VSC) 提供相关解决方案，以避免拥堵和道路事故，尤其是在道路交叉路口，因为这些区域更容易发生事故。在这种情况下，可能影响 VSC 性能的主要损害之一是干扰。在本文中，我们研究了 VSC 在存在干扰的情况下在交叉路口协作传输的性能。我们使用来自随机几何的工具，并将干扰车辆位置建模为泊松点过程。首先，当接收节点可以在路上（作为车辆）或在路外（作为基础设施）时，我们计算直接传输的中断概率。然后，我们分析了协作传输方案的中断概率性能。分析考虑了两个维度：接收节点的解码策略，以及车辆的移动性。我们确定不同交通密度和不同车辆移动模型下的最佳中继位置。我们还表明，在基础设施中继数量达到阈值后，中断概率不会提高。最后，我们表明 VSC 在十字路口的断电概率性能高于高速公路。我们通过蒙特卡罗模拟验证了我们的分析结果。我们表明，VSC 在十字路口的断电概率性能高于高速公路。我们通过蒙特卡罗模拟验证了我们的分析结果。我们表明，VSC 在十字路口的断电概率性能高于高速公路。我们通过蒙特卡罗模拟验证了我们的分析结果。