Apparatus and method for implementing handoff in mobile communication system with short sync. channel

A method for handover is performed, wherein the mobile station roams from a current cell base station to a cell synchronizing asynchronous base stations, the method comprising the steps of: synchronizing the mobile station from the base station receives a pseudo-noise (PN) offset signal within a predetermined time, PN offset value of the specific signal indicates the PN offset of base station synchronization; PN offset value of the asynchronous mobile station reports to the base station; receiving information about the mobile station from a base station synchronization system, the base station asynchronous information; and synchronizing the mobile station to the system according to the received information cell base station handover.