Patent ID: 8649731

Claim:
A base station apparatus for use in a communication system that includes a base station apparatus and mobile station apparatuses configured to perform radio communication via a plurality of channels, and relay station apparatuses configured to relay the communication between the base station apparatus and the mobile station apparatuses, the base station apparatus comprising: a relay station allocation unit configured to determine a relay station allocation that is a channel allocation of first radio resources to be used for each relay station apparatus to relay-transmit to the base station apparatus reception state information indicating a channel reception state transmitted from each mobile station apparatus that communicates with the base station apparatus via the relay station apparatus, and determine a modulation scheme, a code rate or a number of MIMO streams to be used on the first radio resources for each relay station apparatus to transmit the reception state information to the base station apparatus on the basis of a propagation channel state between each relay station apparatus and the base station apparatus or the number of the mobile station apparatuses that are relayed by each relay station apparatus; a mobile station allocation unit configured to determine a mobile station allocation and a type of the reception state information, the mobile station allocation being a channel allocation of second radio resources to be used for each mobile station apparatus to transmit the reception state information to the relay station apparatus within a capacity of the first radio resources allocated to each relay station apparatus; and a radio transmission unit configured to transmit information to each mobile station apparatus and each relay station apparatus, the information including mobile station allocation information that indicates a result of the mobile station allocation, and relay station allocation information that indicates a result of the relay station allocation.