WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SYSTEM MANAGEMENT METHOD, WIRELESS COMMUNICATION DEVICE, AND CONTROL DEVICE
A wireless communication system includes a terminal device and a control device that controls a wireless communication device that is used in wireless communication with the terminal device. The wireless communication device includes an electromagnet. The terminal device includes a magnetic sensor. The control device switches on and off the electromagnet. The control device acquires information on a first magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is off. The control device acquires information on a second magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is on. The control device estimates a direction from the wireless communication device to the terminal device based on a difference between the first magnetic field and the second magnetic field.
1 . A wireless communication system comprising:
a terminal device; and
a controller configured to control a wireless communication device that is used in wireless communication with the terminal device, wherein
the wireless communication device includes an electromagnet,
the terminal device includes a magnetic sensor, and
the controller is configured to:
switch on and off the electromagnet;
acquire information on a first magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is off;
acquire information on a second magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is on; and
estimate a direction from the wireless communication device to the terminal device based on a difference between the first magnetic field and the second magnetic field.
2 . The wireless communication system according to claim 1 , wherein
the controller is configured to transmit a first feedback request to the terminal device after switching off the electromagnet,
the terminal device is configured to transmit first feedback information indicating the first magnetic field detected by the magnetic sensor to the controller in response to the first feedback request,
the controller is configured to transmit a second feedback request to the terminal device after switching on the electromagnet, and
the terminal device is configured to transmit second feedback information indicating the second magnetic field detected by the magnetic sensor to the controller in response to the second feedback request.
3 . The wireless communication system according to claim 1 , wherein
the wireless communication device is a reconfigurable intelligent surface.
4 . The wireless communication system according to claim 3 , wherein
the controller is configured to control a direction of reflection of radio waves by the reconfigurable intelligent surface based on the direction from the reconfigurable intelligent surface to the terminal device.
5 . The wireless communication system according to claim 3 , wherein
the electromagnet is installed so that a direction from a north pole to a south pole of the electromagnet is orthogonal to a reflecting surface of the reconfigurable intelligent surface.
6 . A wireless communication system management method for managing a wireless communication system including a terminal device and a wireless communication device that is used in wireless communication with the terminal device,
the wireless communication system management method comprising:
switching on and off an electromagnet included in the wireless communication device;
acquiring information on a first magnetic field detected by a magnetic sensor included in the terminal device, when the electromagnet is off;
acquiring information on a second magnetic field detected by the magnetic sensor, when the electromagnet is on; and
estimating a direction from the wireless communication device to the terminal device based on a difference between the first magnetic field and the second magnetic field.
7 . (canceled)
8 . A controller that controls a wireless communication device that is used in wireless communication with a terminal device,
the controller comprising processing circuitry, wherein
the processing circuitry is configured to:
switch on and off an electromagnet included in the wireless communication device;
acquire, from the terminal device, information on a first magnetic field detected by a magnetic sensor included in the terminal device, when the electromagnet is off;
acquire information on a second magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is on; and
estimate a direction from the wireless communication device to the terminal device based on a difference between the first magnetic field and the second magnetic field.