Communication system, communication method, and recording medium

A communication method executed by a computer in a communication system including a phased array antenna that transmits a beamformed radio wave and a radio wave reflective plate having a reflection surface of a meta-surface structure, the communication method comprising:

• causing a first optical communication machine associated with the phased array antenna to project projection light toward a second optical communication machine associated with the radio wave reflective plate;
• causing the second optical communication machine that is activate in response to receiving the projection light projected from the first optical communication machine to generate direction data in response to detecting a direction from which the projection light arrives;
• causing the second optical communication machine to retroreflect reflected light of the projection light modulated in a pattern according to transmission data including device data related to the radio wave reflective plate and the direction data toward the first optical communication machine;
• causing the first optical communication machine to acquire the transmission data related to the radio wave reflective plate according to a pattern of the reflected light from the second optical communication machine;
• and
• causing the first optical communication machine to control the phased array antenna according to the device data acquired by the first optical communication machine.

A non-transitory recording medium storing a program for operating a communication system including a phased array antenna that transmits a beamformed radio wave and a radio wave reflective plate having a reflection surface of a meta-surface structure, the program causing a computer to execute the steps of:

• causing a first optical communication machine associated with the phased array antenna to project projection light toward a second optical communication machine associated with the radio wave reflective plate;
• causing the second optical communication machine that is activated in response to receiving the projection light projected from the first optical communication machine to generate direction data in response to detecting a direction from which the projection light arrives;
• causing the second optical communication machine to retroreflect reflected light of the projection light modulated in a pattern according to transmission data including device data related to the radio wave reflective plate and the direction data toward the first optical communication machine;
• causing the first optical communication machine to acquire the transmission data related to the radio wave reflective plate according to a pattern of the reflected light from the second optical communication machine;
• and
• causing the first optical communication machine to control the phased array antenna according to the device data acquired by the first optical communication machine.