Reliable broadcast of safety messages for vehicular network road safety applications

车载网络的新范式将成为提高道路安全、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辆到车辆和车辆到基础设施的通信。当前的无线信道接入解决方案是基于IEEE 802.11p标准的，该标准是基于竞争的，因此不能满足传递安全消息的服务要求。因此，我们开发了一种新的信道接入协议VeMAC，它克服了现有解决方案在安全消息广播方面的局限性。 为了高效可靠地传递安全信息，在这个项目中，我们将研究如何将VeMAC与现有的802.11p解决方案集成在一起，开发出一种可以插入Obus和RSU的产品，而不会改变电信和汽车行业目前正在开发的车辆连接技术。该产品预计将显著提高IEEE 802.11p在高优先级安全应用中的性能，方法是降低安全报文传输冲突的概率，并确保每个安全报文到周围所有车辆和RSU的传输延迟可接受。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。 该项目将为加拿大用户带来重大利益，特别是在改善道路安全和减少道路交通事故造成的社会和经济危害方面。此外，该项目的成果将有助于加拿大在智能交通系统领域占据优势地位。

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.