Patent ID: 7190944

Claim:
A method for performing a handover based on a compressed mode and a common frequency of neighbor base stations in a wireless communication system, comprising the steps of: a) receiving signal intensities of a common frequency of a source base station and a target base station, wherein the signal intensity is measured by a mobile station based on a downlink compressed mode; b) determining whether a handover condition is satisfied based on the signal intensities; c) if the handover condition is satisfied, invoking the mobile station to perform an intra cell hard handover from a frequency which is currently established communication link to the common frequency of the source base station and the target base station, wherein a plurality of compressed mode frames and a guard time between two compressed mode frames are used for the intra cell hard handover, the compressed mode frame preceding the guard time is a last frame of the frequency of the currently established communication link and the compressed mode frame following the guard time is a first frame of the common frequency; and d) invoking the mobile station to perform an inter-cell soft handover between the source base station to the target base station by using the common frequency of the source base station and the target base station.