BASE STATION DEVICE, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To perform spatial multiplexed transmission with a plurality of terminal devices while preventing the deterioration of the spatial multiplexed transmission in an uplink without impairing an efficiency of a MAC layer.SOLUTION: A base station device stores weight for in-phase combining signal received at a plurality of antenna elements for each frequency component, for each combination of terminal devices and antenna elements. Each radio processing section divides received signal of corresponding antenna elements for every frequency component, and weight multiplication sections for each of terminal devices multiply weights of each frequency component corresponding to each terminal device by signal for each frequency component divided by each radio processing section to additively combine the multiplication result for every frequency component. A uplink spatial multiplex number management section counts a terminal device which has been determined that there is level detection by a reception power evaluation section based on the additively combine result. When count number exceeds high limit of spatial multiplex number, the base station device transmits signal for instructing a terminal device which is level-detected but fails to perform a reception processing, to refrain a transmission.