Patent ID: 8660567

Claim:
A base station apparatus comprising: a deciding section that decides whether to transmit data using a first subcarrier block newly allocated to a terminal, or transmit data using a second subcarrier block persistently allocated to the terminal, the first subcarrier block and the second subcarrier block each including a portion of a whole communication band; a frequency scheduling section that, in case that the deciding section decides to transmit the data using the first subcarrier block, allocates the first subcarrier block to the terminal; and a transmission section that, in case that the deciding section decides to transmit the data using the first subcarrier block, transmits, in an orthogonal frequency division multiplexing (OFDM) system, information representing the first subcarrier block allocated by the frequency scheduling section to the terminal and transmits, in the OFDM system, the data to the terminal using the first subcarrier block allocated by the frequency scheduling section, and that, in case that the deciding section decides to transmit the data using the second subcarrier block, transmits, in the OFDM system, the data to the terminal using the second subcarrier block persistently allocated to the terminal, wherein the deciding section decides between using the first subcarrier block or the second subcarrier block for initial transmission of the data but, in case the initial transmission fails and the data is to be retransmitted, the deciding section decides to retransmit the data using exclusively the second subcarrier block, wherein the portion of the whole communication band included in the second subcarrier block is allocated in a distributed manner along a frequency axis, and wherein a fixed modulation and coding scheme (MCS) is applied to retransmit the data using the second subcarrier block.