A communication apparatus that is coupled to a mobile terminal through a wireless link and to a network through a wired link, and that is relaying communications between the mobile terminal and the network. The communication apparatus includes a first transmission-rate acquisition unit and a power control unit. The first transmission-rate acquisition unit acquires wired-link information related to a transmission rate in the wired link. The power control unit controls at least one of a first transmission power of the communication apparatus in downlink transmission to the mobile terminal and a second transmission power of the mobile terminal in uplink transmission from the mobile terminal so as to reduce the difference between a transmission rate in the wireless link and the transmission rate in the wired link.