This invention provides an improved radio communication system performing a
soft hand-off procedure between the first and second base stations for a mobile
station and performing asynchronous packet communication between a base station
controller and each base station. The first and second base stations assign hand-off
exclusive bandwidths to respective communication lines between the base station
controller and themselves during the soft hand-off procedure. Accordingly, the
first and second base stations can simultaneously receive packet signals sent by
the base station controller, and then the mobile station can accurately perform
site diversity.