Patent ID: 8787243

Claim:
A wireless communication system including: a plurality of mobile station apparatuses that transmit coded bits obtained by applying error-correction coding to information bits; a relay station apparatus that receives coded bits from the plural mobile station apparatuses, applies network coding on the coded bits and transmits the network-coded bits; and a base station apparatus that receives and decodes the coded bits transmitted from the plural mobile station apparatuses and the network-coded bits transmitted by the relay station apparatus, characterized in that the base station apparatus, when decoding the received coded bits, performs iterative decoding by regarding the received coded bits as coded bits obtained by serially concatenated coding of the error correction coding and the network coding, and wherein the relay station apparatus controls a ratio of coded bits to be multiplexed by network coding, in accordance with reception power levels at which the coded bits from the mobile station apparatuses reach the base station apparatus.