To enlarge a reception area by transmitting control data with directivity by means of centralizing energy, enlarging a downstream transmission area and also suppressing delay wave at the time of transmission.

A base station is provided with plural n-number antennas so as to form a call area by radio wave to be transmitted and to execute radio communication among plural mobile stations which exist within the call area. At this case, control is executed in such a way that a control data signal to be transmitted by time division by a prescribed interval N(millisecond) is permitted to have directivity by conversing a beam in plural m-directions through the use of the plural n-number antennas and also is transmitted by permitting a phase to differ at every direction of the m-directional based on an offset N(millisecond)/m.