RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, AND COMMUNICATION DEVICE

摘要

A reception device (200a) transmits reception device state information indicating a modulation scheme with which the reception device is compatible, and a channel encoding method. Based on the reception device state information received, a transmission device determines a mapping method for a downlink signal to be transmitted to the reception device (200a). When the reception device (200a) is compatible with BICM-ID, the reception device (200a) transmits reception device state information indicating that the reception device (200a) is compatible with the BICM-ID. Accordingly, the backward compatibility with a communication system using gray mapping can be maintained, and the BICM-ID can be applied.