Device and method of controlling transmission power

A method of controlling transmission power used for wireless transmission in a wireless communication device, the method comprising:

• calculating, by a controller, remaining emission energy of a third period based on tolerant emission energy of a first period and used energy which was emitted for the wireless transmission during a second period, the third period included in the first period and being a period from a current time to a point in time following the current time, the second period being from the current time to a point in time preceding the current time;
• calculating, by the controller, a transmission power level of the third period based on the remaining emission energy of the third period and a target power level of the third period;
• and
• generating, by the controller, a power control signal for controlling a power level of a transmission signal unit based on the transmission power level.