WIRELESS BASE STATION, USER TERMINAL, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD

摘要

To provide a wireless base station, a user terminal, a wireless communication system, and a wireless communication method that use a new architecture that can substantially increase the utilization efficiency of wireless resources. A plurality of user terminals provide channel-state information to a wireless base station as feedback. On the basis of said channel-state information feedback, the wireless base station selects, from among a plurality of candidate-user sets indicating user-terminal candidates non-orthogonally multiplexed onto given wireless resources and a plurality of power-ratio sets indicating transmission-power ratios for downlink signals sent to the user terminals indicated by the candidate-user sets, a candidate-user set and power-ratio set to use when transmitting downlink signals. The wireless base station uses the transmission-power ratios indicated by the selected power-ratio set to transmit downlink signals to the plurality of user terminals indicated by the selected candidate-user set, and the selected candidate-user set receives said downlink signals.