Patent ID: 8036165

Claim:
A base station apparatus, comprising: a communication unit which communicates with a plurality of terminal apparatuses, respectively; and a control unit which allocates, in an uplink, the plurality of terminal apparatuses to a plurality of time slots in a manner that the plurality of terminal apparatuses are multiple-accessed by division of time and which allocates, in a downlink, the plurality of terminal apparatuses respectively allocated to the plurality of time slots in the uplink to a single time slot in a manner that the plurality of terminal apparatuses are multiple-accessed by division of space, wherein the communication unit comprises a receiving processing unit which receives respectively signals from the plurality of terminal apparatuses which have been multiple-accessed by the division of time and which derives respectively, for each time slot, receiving channel characteristics corresponding to the plurality of terminal apparatuses at mutually different timings; and a transmission processing unit which derives transmitting channel characteristics for the plurality of terminal apparatuses that are used at the same timing from the receiving channel characteristics for the plurality of terminal apparatuses derived by the receiving processing unit at mutually different timings and which transmits signals respectively to the plurality of terminal apparatuses which have been multiple-accessed by the division of space, based on the derived transmitting channel characteristics, wherein the control unit configures a frame to include a plurality of time slots for the uplink and a plurality of time slots for the downlink and allocates, in the uplink, different time slots within a single frame to the plurality of terminal apparatuses to be allocated to a single time slot in the downlink.