A base station divides a packet into a plurality of wireless transfer blocks, determines a priority of a wireless transfer block based on a delivery acknowledged amount accumulated value, allocates wireless resources to the wireless transfer blocks based on determined priority, and transmits generated wireless transfer blocks by using allocated wireless resources. A mobile station transmits a delivery acknowledgement to the base station when the wireless transfer block is properly received and a re-transmission request when the wireless transfer block is not properly received, and reproduces the packet from received wireless transfer blocks.