基于V2X的城市智能交通信号灯控制方法

Research on intelligent traffic signal control method of urban road based on V2X

为缓解城市道路拥挤状况、保证道路的畅通性,在车用无线通信技术(vehicle to everything,V2X)的基础上对城市道路交通信号灯进行智能控制。首先利用复用蜂窝用户上行链路实现车流量数据传输,再根据二进制变量复用关系和信道高斯白噪声确定通信链路信号干噪比,依据干扰情况设计智能交通系统V2X通信方案。在此基础上,依据道路区间的车辆数量因子、车辆速度因子和道路负载因子,将道路情况可分为畅通、良好、一般、轻微堵塞、拥堵共5种状态,再通过设计自组网流程和检测流程实现对信号灯的控制。根据实验对比结果可知:该方法的控制指令传输时延较少,且数据采集过程最大信息传输速率可达1354 bit/s,证明了该方法的有效性。

In order to alleviate the congestion of urban roads and ensure the smoothness of roads,intelligent control of urban traffic lights is carried out on the basis of V2X communication system.Firstly,the multiplexed cellular user uplinks are used to realize traffic data transmission,and then the signal dry noise ratio of the communication link is determined according to the binary variable multiplexing relationship and the white gaussian noise of the channel,and an intelligent traffic system V2X communication scheme is designed according to the interference.On this basis,according to the vehicle number factor,vehicle speed factor and road load factor in the road interval,the road conditions can be divided into five states:smooth,good,general,slightly congested and heavily congested.Then,the control of the signal lights can be realized through the design of ad-hoc network flow and detection process.According to the experimental comparison results,the control instruction transmission delay of this method always keeps a small state,and the maximum information transmission rate of the data acquisition process can reach 1354 bit/s,which fully proves the effectiveness of this method in the control of traffic lights.