US Patent 7542433 Transmission apparatus and communication mode selection table updating method

A transmission apparatus and method for updating a communication mode selection table that updates a communication mode selection table correctly and selects an optimal MCS according to an actual channel condition. A buffer (104) temporarily stores calibration data to be transmitted for updating a table (148). A scheduler (106) performs scheduling of data to be transmitted based on a CIR on a downlink reported from a plurality of communication terminal apparatuses. When there is no data to be transmitted, the scheduler (106) sends calibration data from the buffer (104). When calibration data is transmitted as a result of the scheduling, the scheduler (106) notifies an address information generation section (112) of the communication terminal apparatus to which the calibration data is transmitted.