Patent ID: 7321771

Claim:
A control method capable of reducing a call dropped rate of a mobile station in a wireless communication system, the control method comprising: monitoring receiving power levels of a plurality of neighbor cells of the wireless communication system according to an information of a serving cell of the wireless communication system; the mobile station reconfirming the synchronization of the mobile station with respect to the BCCHs of neighbor cells having known BSICs in response to Base Station Identification Codes (BSICs) of the six neighbor cells corresponding to the six strongest receiving power levels being known; and entering a second priority mode for performing frequency correction and synchronization of the mobile station with respect to at least one neighbor cell's Broadcast Control Channel (BCCH) to decode the at least one neighbor cell's BSIC only when the mobile station reconfirming the synchronization of the mobile station with respect to the BCCHs of neighbor cells having known BSICs is completed, wherein the at least one neighbor cell corresponds to at least one receiving power level other than the six strongest ones.