| 摘要 |
PROBLEM TO BE SOLVED: To suppress power consumption for notifying a master unit of the transmission power value of a slave unit and the use of wireless resources, by performing wireless communication of the master unit and one or a plurality of slave units, thereby suppressing radio wave interference for other wireless communication system as much as possible.SOLUTION: In a stand-by state, a master unit transmits the information indicating the transmission power value of the master unit to a slave unit by using a channel for transmitting a control signal. The slave unit measures the reception field strength of a control signal transmitted from the master unit, determines the transmission power value of its own device from the measured value of the reception field strength and the transmission power value of the master unit, and then transmits signals carrying a notification message including the information indicating the transmission power value of its own device, by using predetermined slots at a predetermined period. |
