A mobile station and a method are provided for determining to perform a handover based on information of movement between cells. Signals transmitted from a serving base station and a neighboring station may be scanned at a periodic interval, the power of the transmitted signals may be measured, and the power of the transmitted signals from the serving base station is compared to a critical power. A movement discriminator denoting whether the mobile station lies in a cell of the serving station may be formed based on the power of the transmitted signals when the signal power of the serving base station is less than the critical power. The movement discriminator may be stored accumulatively, and performance of handover may be decided based on the discriminators stored accumulatively.