一种基于WiFi Direct的车路信息交互方法

Method of vehicle-road information interaction based on WiFi direct

基于短程通信的车车、车路信息交互已经成为智能交通的一种发展趋势,提出一种基于Wi Fi Direct的车路信息交互方法,通过运行于网络中的路边基站向车载终端发出连接并发布消息。针对目前用户个性化信息服务的需求,提出一种基于过滤信息的Wi Fi Direct自动连接方法,在Wi Fi Direct技术上作出改进,在Sendmessage数据帧中增加一帧过滤信息。该方法简化了基站与终端之间的连接,提高了消息推送的准确性,而且实地测试得出,该改进方法比现有的方法在连接速度上平均提高35.01%,消息推送量平均提高8.65%。

The vehicle,vehicle-road information interaction based on short-range communication becomes a development trend of intelligent transportation. The method of vehicle-road information interaction based on WiFi direct is proposed,which is sending connection and information to the vehicle terminal by the roadside base station running in the network. With the de-mands of the users personalized information service,the method of WiFi direct automatic connection based on filtering informa-tion is proposed,that is the improvements based on WiFi direct technology and adding a frame filtering information in send-mes？sage data frame. The proposed method simplifies the connection between the base station and vehicle terminal,and improves the accuracy of message push. The field test shows that the connection speed is increased by 35.01% and the quantity of push mes-sages is increased by 8.65% by the improved method compared with the existing method.