The role of robot technologies is growing particularly in the areas of disaster response, infrastructure inspection, and so on. For remote operation of the robots, wireless communication is important to control, send command, and receive telemetry signals. However, it could be often disconnected due to radio wave attenuation, shadowing, or interference in the real field. In order to overcome the above problems, we have proposed and developed a multi-hop communication technology, specialized for remotely controlled robots, including drones, with high reliability and low latency using dual frequency band in 920 and 169 MHz. In this paper, we evaluate the radio propagation and communication quality characteristics in field experiment. In the experiment, the application of the proposed technology to disaster response was demonstrated. GRAPHICAL ABSTRACT

中文翻译：

---

用于远程操作机器人的多跳无线指挥和遥测通信系统，使用 920 MHz/169 MHz 扩展操作区域超出视线

机器人技术的作用正在增长，尤其是在灾难响应、基础设施检查等领域。对于机器人的远程操作，无线通信对于控制、发送命令和接收遥测信号非常重要。但是，由于无线电波衰减、阴影或实际场中的干扰，它经常会断开连接。为了克服上述问题，我们提出并开发了一种多跳通信技术，专门用于遥控机器人，包括无人机，使用920和169 MHz的双频段，具有高可靠性和低延迟。在本文中，我们通过现场实验评估无线电传播和通信质量特性。在实验中，展示了所提出的技术在灾害响应中的应用。