Reliable broadcast of safety messages for vehicular network road safety applications

车载网络的新范式将成为实现各种应用的关键技术，以改善道路安全、智能交通和车载信息娱乐。车载网络由车载单元（OBU）和路侧单元（RSU）组成，以支持未来几年将部署的车对车和车对基础设施通信。无线电信道接入的当前解决方案基于IEEE 802.11p标准，该标准是基于竞争的，因此不能满足用于递送安全消息的服务要求。因此，我们已经开发了一种新的信道接入协议，VeMAC，它克服了目前的解决方案在安全消息广播的局限性。 为了实现高效可靠的安全信息传输，在本项目中，我们将研究如何将VeMAC与现有的802.11p解决方案集成，并开发一种可插入OBU和RSU的产品，而不改变电信和汽车行业目前正在开发的连接车辆的技术。该产品预计将通过降低安全消息传输冲突的可能性并确保每条安全消息向所有周围车辆和RSU的可接受的传递延迟，显着增强IEEE 802.11p在高优先级安全应用中的性能。在目前车载网络技术发展的早期阶段，我们的产品将是第一个在支持道路安全应用方面对IEEE 802.11p标准进行重大改进的产品。 这一项目将给加拿大用户带来重大惠益，特别是在改善道路安全和减少道路交通事故的社会和经济危害所造成的财政损失方面。此外，该项目的成果将有助于加拿大在智能交通系统领域的优势地位。

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.