Patent ID: 8520614

Claim:
A base station apparatus, comprising: a control unit adapted for a system in which multiple time slots for downlink communication and multiple time slots for uplink communication are time-division multiplexed to form a frame, and configured to define, in each time slot, a plurality of frequency-division multiplexed subchannels and to assign, to each frame destined to at least one terminal apparatus, two or more subchannels having the same frequency in a time slot for downlink communication and in a time slot for uplink communication; and a communication unit configured to transmit a multicarrier signal to a terminal apparatus on a subchannel assigned in the time slot for downlink communication by the control unit, and to receive a single carrier signal from a terminal apparatus on a subchannel assigned in the time slot for uplink communication by the control unit, wherein the control unit assigns two or more subchannels in the time slot for downlink communication and in the time slot for uplink communication so as to include subchannels that are discontinuous in a direction of a free axis, and wherein the communication unit concurrently uses the two or more subchannels in the time slot for downlink communication, and uses, in the time slot for uplink communication, one of the subchannels that are discontinuous in the direction of frequency axis, switching between the subchannels frame by frame.