基于DSRC的车辆防追尾预警算法

摘要

Traditional vehicle rear-end collision warning algorithms are not able to give comprehensive consideration to false alarm rate and timeliness at the same time. A novel method of warning algorithm was proposed based on front vehicles to solve the problem, it applied dedicated short range communication (DSRC) technology to achieve a stable and efficient information exchange between vehicles. The critical safety vehicle distance was calculated by a safety vehicle distance warning model. The vehicle on board unit (OBU) transmitted the safety information to the front OBU through an adaptive broadcasting algorithm. The simulation and analysis were carried out with VanetMobiSim and network simulator version 2 (NS2). The results show that the vehicle rear-end collision warning algorithm is feasible and effective, it solves the contradiction between the false alarm rate and the alarming timeliness, and increase the road traffic safety, which has important significance to the development and improvement of vehicle rear-end collision warning system.%为弥补传统防追尾预警算法在兼顾虚警率与及时性方面的不足,提出一种新的基于前方车辆的防追尾预警算法.利用专用短程通信技术(DSRC)实现车车之间的信息交互;通过安全车距预警模型计算临界安全车距,自车车载单元(OBU)利用自适应广播算法将安全情况信息发送给前车OBU;通过运用移动节点轨迹的生成工具(VanetMobiSim)和面向对象的网络仿真器-2(NS2)进行联合仿真分析,以及主动安全系统开发工具PreScan与Matlab/Simulink进行联合仿真分析.结果表明:自适应广播算法的可行性和有效性得到验证;预警算法较好地解决了传统预警算法在虚警率和报警及时性方面的矛盾,这对发展与完善汽车防追尾预警系统具有重要意义.