基于Rayleigh衰落模型下的车载自组织网络性能分析

The Vehicle Ad Hoc Network Performance Analysis Based on Rayleigh Decay Model

研究基于Rayleigh衰落信道下的车载自组织网络性能,针对高速公路场景,分析了车辆与路侧单元上行通信的多个网络性能指标,这些网络性能指标有:中断概率、数据包出错概率、数据包平均丢失概率等。对这些网络性能指标进行了数值仿真,讨论了不同参数对其影响,考虑的参数有:竞争窗口大小、数据包大小、车辆数目、车速以及数据包到达率等。仿真结果验证了所提出的网络性能分析模型的有效性。该模型可以用来分析各种参数对高速公路场景下车-路上行通信网络性能的影响,为设计合理的路侧单元部署方案提供参考依据。

This paper mainly studies on the performance of vehicle ad hoc network based on Rayleigh decay channel.Considering the highway scenario,this paper analyzes several network performance indicators of vehicle communication with roadside units,such as interrupt probability,packet error probability,average packet loss probability,and so on.Numerical simulation is performed to discuss the effects of different parameters on these network performance indicators,including the size of the competition window,the size of the packet,the number of vehicles,the speed of the vehicle,and the arrival rate of the packet.Simulation results show that the proposed network performance analysis model is valid.This model can be used to analyze the influence of various parameters on the performance of the off-road communication network in highway scenarios,and provide reference for designing a reasonable roadside unit deployment scheme.