Reliable broadcast of safety messages for vehicular network road safety applications

车辆网络的新范式将成为改善道路安全、智能交通和车载信息娱乐等各种应用的关键技术。车辆网络由车载单元（OBUs）和路侧单元（rsu）组成，以支持车辆对车辆和车辆对基础设施的通信，将在未来几年内部署。目前无线信道接入的解决方案是基于IEEE 802.11p标准的，该标准是基于争用的，因此不能满足传递安全信息的业务需求。因此，我们开发了一种新的信道访问协议VeMAC，它克服了现有方案在安全消息广播方面的局限性。

The new paradigm of vehicular networks will be the key technology to enable various applications for improving road safety, intelligent transportation, and in-vehicle infotainment. Vehicular networks consist of vehicle on board units (OBUs) and road side units (RSUs) to support vehicle-to-vehicle and vehicle-to-infrastructure communications, to be deployed in the next few years. The current solution for radio channel access is based on the IEEE 802.11p standard, which is contention-based and therefore cannot meet the service requirements for delivering safety messages. As a result, we have developed a new channel access protocol, VeMAC, which overcomes the limitations of current solution in safety message broadcasting. For efficient and reliable safety message delivery, in this project, we will investigate how to integrate VeMAC with the existing 802.11p solution, and develop a product which can be plugged in to the OBUs and RSUs, without changing the technology currently under development by both telecom and automobile industries for connecting vehicles. The product is expected to significantly enhance the performance of IEEE 802.11p in high priority safety applications, by reducing the probability of transmission collisions of a safety message and ensuring an acceptable delivery delay of each safety message to all the surrounding vehicles and RSUs. In the current early stage of vehicular network technology development, our product will be the first to provide a significant improvement to the IEEE 802.11p standard in supporting road safety applications. This project will result in significant benefits to Canadian users, especially in improving road safety and in reducing financial loss caused by the societal and economic harm of road traffic accidents. Furthermore, the outcome of the project will contribute to an advantage position for Canada in the intelligent transportation systems sector.