NETWORK RELAY DEVICE, MAIN BODY DEVICE, ATTACHMENT DEVICE, AND ALLOCATION METHOD AND RELAY OPERATION CONTROL METHOD FOR NETWORK RELAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a technique capable of easily starting and stopping data relay operation in a network relay device.SOLUTION: A network relay device includes: a main body device; and an attachment device. The main body device includes: a radio transmission unit for supplying power through radio; a first communication unit for communicating with the attachment device through radio; and a second communication unit for communicating with a device different from the attachment device. The attachment device includes: a radio receiver unit for receiving power supplied from the main body device through radio; a third communication unit for communicating with the main body device through radio; and a fourth communication unit for communicating with a terminal. The attachment device operates when power is received from the main body device, whereas does not operate when power is not received from the main body device.