关键词: 汽车安全, 预警算法, 安全车距预警模型, 专用短程通信技术 (DSRC), 自适应广播算法

Abstract:

 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.

Key words: automobile safety, warning algorithm, safety vehicle distance warning model, dedicated short range communications (DSRC), adaptive broadcast algorithm