TRANSMITTING APPARATUS AND COMMUNICATION MODE SELECTION TABLE UPDATING METHOD

摘要

A transmitting apparatus and communication mode selection table updating method for appropriately updating a communication mode selection table to select an optimum MCS in accordance with an actual line state. A buffer (104) temporarily stores calibration data to be transmitted for updating a table (148). A scheduler (106) performs, based on downstream CIRs notified of by a plurality of communication terminal devices, a scheduling of data to be transmitted. When there is no data to be transmitted, the scheduler (106) causes the buffer (104) to transmit the calibration data. When the calibration data is to be transmitted in accordance with the result of a scheduling, the scheduler (106) notifies a destination information producing part (112) of to which communication terminal device the calibration data is to be transmitted.