US Patent 11882456 Wireless LAN router, detection method, and detection program

A wireless LAN router includes a directional antenna configured to transmit and receive wireless signals to and from each device, and a processing circuit. The processing circuit learns training data indicating an incoming direction of a wireless signal from an authorized device. The processing circuit then determines whether a wireless signal of a detection target device is a wireless signal from an authorized direction, using an incoming direction of the wireless signal from the detection target device received by the directional antenna and the training data obtained by the machine learning, and outputs a result of determination.