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

A method of controlling an amount of light of a terminal in a visible light communication system, the method comprising:

• determining whether a light signal received from a sensor is detected in a reception area smaller than a reference size;
• increasing an amount of light for a light source signal to transmit to the sensor, when the light signal received from the sensor is detected in the reception area smaller than the reference size;
• and
• transmitting, to the sensor, a light source signal according to the increased amount of light.

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 measure an amount of light for the light signal received from the sensor, to determine whether the measured amount of light is less than a threshold value, and to increase an amount of light for a light source signal to transmit to the sensor when the measured amount of light is less than the threshold value;
• and
• a power source configured to transmit, to the sensor, a light source signal according to the increased amount of light.

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 the light signal received from the sensor 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 light signal received from the sensor 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.