1. A method for controlling a power in a wireless communication network, the method comprising: enabling a first base station to transmit a broadcasting message including a utilization of the first base station; enabling a second base station to compare its utilization with the utilization of the first base station by using the broadcasting message; and enabling the second base station to perform a turn-off operation if the utilization of the second base station is lower than the utilization of the first base station, wherein the first base station and the second base station form a cluster by using Delaunay triangulation, and wherein the utilization of the first base station is determined in accordance with Equation A: ∫ L ⁢ ρ i ⁡ ( x ) ⁢ p i ⁡ ( x ) ⁢ ⅆ x , [ Equation ⁢ ⁢ A ] where L represents an area where the first and second base stations provide services, represents index of the first and second base stations, ρ i (x) represents system load density, and p i (x) represents user association probability.