WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, AND WIRELESS LAN BASE STATION DEVICE

To select STAs that simultaneously transmit a wireless frame and cause the STAs to perform simultaneous transmission when simultaneously transmitting the wireless frame from a plurality of wireless LAN terminal apparatuses (STAs) to one wireless LAN base station apparatus (AP) in a multiple access scheme.SOLUTION: An AP includes: terminal information collection means for collecting terminal information used for simultaneous transmission STA selection and simultaneous transmission control; simultaneous transmission determination means for selecting a combination of STAs for performing simultaneously transmission according to terminal information; and trigger transmission means for instructing a simultaneous transmission STA to simultaneously transmit and transmitting a trigger frame including information necessary for simultaneous transmission control. The terminal information collection means collects propagation characteristic information of the STA as terminal information. The simultaneous transmission determination means compares data transmission efficiency for simultaneous transmission with the combination of STAs and data transmission efficiency for transmission with a single STA on the basis of the propagation characteristic information and selects the combination of STAs as a combination of STAs that transmit simultaneously when the data transmission efficiency of simultaneous transmission is high. The STA specified in the trigger frame simultaneously transmits a wireless frame to the AP.SELECTED DRAWING: Figure 4 【課題】複数のＳＴＡから１つのＡＰに無線フレームを多元接続方式で同時送信する際に、同時送信するＳＴＡを選定し、そのＳＴＡに同時送信を行わせる。【解決手段】ＡＰは、同時送信するＳＴＡの選定及び同時送信制御に用いる端末情報を収集する端末情報収集手段と、端末情報に応じて同時送信するＳＴＡの組合せを選定する同時送信判定手段と、同時送信するＳＴＡに同時送信を指示しかつ同時送信制御に必要な情報を含むトリガフレームを送信するトリガ送信手段とを備える。端末情報収集手段は、端末情報としてＳＴＡの伝搬特性情報を収集する。同時送信判定手段は、伝搬特性情報に基づいて、ＳＴＡの組合せで同時送信した場合のデータ伝送効率と、ＳＴＡ単体で送信した場合のデータ伝送効率とを比較し、同時送信のデータ伝送効率が高い場合に同時送信するＳＴＡの組合せとして選定し、トリガフレームで指定されたＳＴＡがＡＰに無線フレームを同時送信する。【選択図】図４