Method and apparatus for controlling amount of light in visible light communication system

A terminal in a visible light communication system, the terminal comprising:

• a receiver configured to receive a light signal from a sensor;
• a controller configured to determine whether an amount of light for the light signal is less than a threshold value or determine whether the light signal is detected in a reception area smaller than a reference size, and to increase an amount of light for a light source signal to transmit to the sensor when the amount of light for the light signal is less than the threshold value or the light signal is detected in the reception area smaller than the reference size;
• and
• a power source configured to transmit, to the sensor, a light source signal according to the increased amount of light.