Patent ID: 7912011

Claim:
A radio communication system including a plurality of base stations and a plurality of mobile stations, a mobile station including a reception timing difference unit receiving reference signals transmitted from neighboring base stations, measuring a reception timing difference between the reference signals, and reporting the reception timing difference to one or more of the base stations, a base station including a frame timing difference computation unit and a frame timing difference information report unit, the frame timing difference unit computing a frame timing difference of the reference signals between said base station and the neighboring base stations based on the reception timing difference reported from the mobile station, the frame timing difference information report unit reporting the frame timing difference computed by the frame timing difference computation unit to the mobile station, the mobile station further including a cell search unit performing cell search, wherein the cell search comprises computing correlations for each pair of a first set of pairs of candidate timings and candidate scramble codes, the first set of pairs being determined based on the frame timing difference reported from the base station, and determining a pair having a maximum correlation in the first set of pairs.