Patent ID: 8874160

Claim:
A communication apparatus being coupled to a mobile terminal through a wireless link and to a network through a wired link, for relaying communication between the mobile terminal and the network, the communication apparatus comprising: a first transmission-rate acquisition unit for acquiring wired-link information related to a transmission rate in the wired link; a power control unit for controlling 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 a difference between a transmission rate in the wireless link and the transmission rate in the wired link; and a first memory unit for storing first information indicating the transmission rate in the wireless link and a communication quality level of the wireless link associated with each of a plurality of modulation-and-encoding schemes, wherein the power control unit selects one of the modulation-and-encoding schemes by reference to the first information so as to reduce the difference between the transmission rate in the wireless link and the transmission rate in the wired link, determines the communication quality level associated with the selected modulation-and-encoding scheme, and adjusts the at least one of the first transmission power and the second transmission power based on the determined communication quality level.