WIRELESS BASE STATION, WIRELESS TERMINAL, WIRELESS COMMUNICATION SYSTEM, AND TRANSMISSION POWER CONTROL METHOD

The present invention includes: a plurality of antenna sections (14a, 14b), each of which to generate base station reception beams and to receive, by using the base station reception beams, one or more signals transmitted from a wireless terminal using one or more terminal transmission beams; a measurement unit (15) that measures reception quality of each of the signals for each of the base station reception beams; and a control unit (11) that groups the base station reception beams into groups in units of the antenna sections (14a, 14b), and perform transmission power control on the terminal transmission beams of the wireless terminal in units of the groups, on the basis of a result of measurement of the measurement unit (15) in units of the groups.