| 摘要 |
PURPOSE:To prevent consumption of a battery of a mobile station and to avoid interruption of a voice head by decreasing a transmission output level by a prescribed level when a reception electric field level of a signal from a base station is a prescribed level or over. CONSTITUTION:A signal from a control signal reception circuit 15 is used to discriminate whether or not a transmission output switching request signal is received from a radio base station 20. Upon the receipt of the signal, a transmission output control circuit 8 is controlled to set an output level of a transmission output amplifier 5 to a level of a command and an output of a voice monitor signal of a voice monitor signal generator 7 is made consecutive. When it is discriminated that a reception electric field level fetched by a reception electric field level detection circuit 13 is a specified value or over, the circuit 8 is controlled to set an output level of the amplifier 5 to the state decreased by a prescribed level L1 and the voice monitor signal is being sent. Thus, interruption of voice head is not caused and consumption of the battery of the mobile station is prevented. |
