Patent ID: 8805432

Claim:
A mobile communication terminal that performs radio communication with a base transceiver station in a mobile communication system, the mobile communication terminal comprising: a use state detecting unit for detecting a use state in communication of the mobile communication terminal about an occurrence of a start event of a transmission power decreasing process of decreasing a transmission power of the mobile communication terminal; an average transmission power calculating unit for calculating a monitoring period average value that is an average value of the transmission power from the mobile communication terminal to the base transceiver station in a monitoring period that is set beforehand and that is a period for calculating the average value of the transmission power; a memory for storing a corresponding table for setting a threshold value of the monitoring period average value for each use state of the mobile communication terminal; a determination unit for comparing the monitoring period average value calculated by the average transmission power calculating unit with the threshold value set in the corresponding table in accordance with the use state of the mobile communication terminal detected by the use state detecting unit; and a transmission power suppressing unit for, when the monitoring period average value is equal to or greater than the threshold value, controlling the transmission power from the mobile communication terminal to the base transceiver station to be decreased by transmitting an instruction signal for suppressing the average value during a transmission power suppressing period, so that the average value of the transmission power in a control period that is a period from a start point of the monitoring period to an end point of the transmission power suppressing period following the monitoring period is set equal to or smaller than the threshold value; wherein the transmission power suppressing unit changes the threshold value by referring to the corresponding table stored in the memory in accordance with the use state detected by the use state detecting unit; wherein the monitoring period is a period of not transmitting the instruction signal for suppressing the average value and a period of calculating the monitoring period average value; wherein the transmission power suppressing period that follows the monitoring period is a period of not being involved in calculating of the monitoring period average value; and wherein the average transmission power calculating unit and the transmission power suppressing unit are provided in the mobile communication terminal.