基于模型的车辆队列专用短程通信系统关键性能指标描述方法  

A Model-based Description Method for Key Performance Indicators of DSRC System in Vehicle Platoons

作　　者：石佳 罗禹贡[1] 齐蕴龙 李克强[1] Shi Jia;Luo Yugong;Qi Yunlong;Li Keqiang(School of Vehicle and Mobility,Tsinghua University,State Key Laboratory of Automotive Safety and Energy,Beijing 100084)

机构地区：[1]清华大学车辆与运载学院,汽车安全与节能国家重点实验室,北京100084

出　　处：《汽车工程》2020年第11期1449-1457,1505,共10页Automotive Engineering

基　　金：北京市科技计划课题“自动驾驶轿车关键技术平台开发”(D171100005117002)资助。

摘　　要：针对目前车辆队列间通信系统的研究中,缺乏基于模型的通信性能指标描述方法,本文中根据无线网络通信延迟特点,基于三参数Burr分布对端到端时延进行了描述;根据无线信号功率强度的概率分布规律,并考虑视距传播内障碍物遮挡的影响,基于Nakagami-m分布建立了丢包率的描述方法。针对车辆队列应用制定了通信协议,并基于DSRC开发了队列通信系统平台。开展了多场景实车试验,验证了通信性能指标描述方法的正确性。结果表明,本文中提出的方法能表征实际情况下车辆队列通信系统的性能特点,并能反映环境因素对通信性能的影响,适用于车辆队列的控制。In view of the lack of model-based description method of communication performance indicators in the current research of vehicle platoon communication system,the end-to-end delay is described based on three-parameter Burr distribution in this paper,according to the features of wireless network communication delay.According to the probability distribution law of wireless signal power intensity,with consideration of the effects of obstacle obstruction in the line-of-sight propagation,the description method of packet error rate(PER)is established based on Nakagami-m distribution.Then a communication protocol is formulated for vehicle platoon application,and the communication system platform is developed based on dedicated short range communication.Finally,multi-scenario vehicle tests are conducted to verify the correctness of the description method.The results show that the method proposed can characterize the performance features of vehicle platoon communication system under actual conditions,and reflect the effects of environmental factors on communication performance,suitable for the control of vehicle platoons.

关 键 词：车辆队列 通信性能 专用短程通信 端到端时延 丢包率 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]