The present invention relates to a maximum allowable transmission rate determination method for determining a maximum allowable transmission rate which a mobile station establishing radio links with a first cell and a second cell can use. The maximum allowable transmission rate determination method according to the present invention includes notifying, at the first cell, first control information for controlling the maximum allowable transmission rate of the mobile station, to the mobile station; measuring, at the second cell, an interference power from another cell; calculating, at the second cell, second control information for controlling the maximum allowable transmission rate of the mobile station based on the measured interference power, to notify the second control information to the mobile station; and determining, at the mobile station, the maximum allowable transmission rate of the mobile station, by multiplying the first control information by the second control information.