Fuente: Wipo "IOT" The embodiments of the present application provide a communication method, a system, and a related device. The method comprises: a network device sends first indication information to an A-IoT device, the first indication information being used for indicating to the A-IoT device to report an energy property of the A-IoT device; and the A-IoT device sends first energy information of the A-IoT device, the first energy information being used for indicating the energy property of the A-IoT device. In this way, the network device can estimate an energy status of the A-IoT device on the basis of the first energy information. For example, the network device can estimate remaining energy of the A-IoT device. Accordingly, the network device can determine, on the basis of the energy status of the A-IoT device, a data transmission policy between the network device and the A-IoT device. Therefore, the network device can perform data communication with the A-IoT device when it is determined that the A-IoT device has sufficient energy. This can, to the greatest extent possible, avoid interruption of data transmission between the network device and the A-IoT device due to insufficient energy of the A-IoT device in a process in which the network device performs data communication with the A-IoT device.