V2X communications are nowadays performed at 5.9\,GHz spectrum, either using WiFi-based or Cellular technology. The channel capacity is limited, and congestion control regulates the number of messages that can enter the medium. With user rate growing, overloading becomes a factor that might affect road safety and traffic efficiency. The present paper evaluates the potential of using Radar-Based Communication (RadCom) for offloading the V2X spectrum. We consider a heavy-duty vehicle (HDV) platooning scenario as a case of maneuver coordination where local messages are transmitted by means of RadCom at different penetration rates. Simulations show significant improvements in channel occupation and network reliability. As a result, RadCom allows for shorter safe and energy efficient inter-vehicle distances.

翻译：当前V2X通信主要在5.9GHz频段实现，采用基于WiFi或蜂窝技术。信道容量有限，拥塞控制机制调节可进入介质的信息数量。随着用户速率增长，过载问题可能影响道路安全与交通效率。本文评估了基于雷达通信（RadCom）卸载V2X频谱的潜力。以重型车辆（HDV）编队行驶场景为例，在机动协调中通过不同渗透率的RadCom传输局部信息。仿真结果表明，RadCom能显著改善信道占用和网络可靠性。因此，RadCom可支持更短的安全节能车间距离。