There are provided a base station, a terminal, a communication system, and a communication method in a wireless communication system in which a base station and a terminal 102 communicate with each other, in which the base station 101 can efficiently notify the terminal 102 of control information. The base station 101 includes a transmitting unit 507 configured to transmit to the terminal a radio resource control signal including information concerning a first uplink power control related parameter configuration and information concerning a second uplink power control related parameter configuration. The base station 101 configures, as a first value, information concerning a transmit power control command value included in a physical downlink control channel transmitted in a first subframe subset, notifies the terminal of the information, configures, as a second value, independently from the first value, information concerning a transmit power control command value included in a physical downlink control channel transmitted in a second subframe subset, and notifies the terminal of the information.