Patent ID: 8514772

Claim:
A handover method in mobile communications with a mobile station for a handover from a first base station to a second base station at different frequencies, the method comprising: measuring, by the mobile station, a time difference of a frame timing within one frame between a first radio frame in a first traffic channel and a radio frame in a perch channel, where the first traffic channel being a channel between the mobile station and the first base station in communication and the perch channel being a channel between the mobile station and the second base station, and sending the measured time difference to the base station; detecting, at the base station comprising the first and second base stations and a network, the discrepancy of frame numbers between a frame number of the first radio frame and a frame number of the radio frame of the perch channel; and performing, by the second base station, a phase correction of a second radio frame in a second traffic channel for transmitting a signal to the mobile station, the phase correction making a phase of the second radio frame matched to a phase of the first radio frame, and the phase correction including a correction of the time difference of the frame timing within one frame and a correction of the discrepancy of frame numbers between the first radio frame and the second radio frame, based on information of the time difference measured by the mobile station and the discrepancy detected by the base station side.