| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio communications system capable of controlling a transmitted power without increasing interferences carelessly even when error is caused in a transmitted power control value, a received electric field monitor value and the attenuation of a propagation path. SOLUTION: A control judging function 13 of a master device 1 judges the difference between a standard received electric field value k and a power value detected by a received electric field detection function 11, and requests a transmitted power control when the difference exceeds a control allowable value. A transmitted power control function 14 generates a control signal according to a change request, and a transmitted function 12 changes the transmitted power according to the control signal. The difference judgment function 24 of a slave device 2 judges the difference by comparing the last received electric field value held in a received electric field value holding function 23 with the received electric field value. A sending power control function 25 generates a control signal according to a result of the difference judgment, then a transmitted function 22 changes the transmitted power according g to the control signal. |
