A method for reducing standby power consumption in an optical wireless communication system

An optical front-end configured to transmit a data signal for optical wireless communication, the optical front-end comprising:

• a light source configured to emit light for optical wireless communication based on an input signal comprising the data signal to be transmitted via the optical front-end;
• a power switch configured to turn on or off a power supply to the light source;
• a detector configured to:
• detect the input signal on a signal path of the optical front-end;
• and
• send a first trigger signal related to a start of transmission, SoT, of the input signal to a switch controller;
• the switch controller configured to control the power switch to power on the light source upon receiving the first trigger signal;
• and
• a signal interface configured to add an additional delay in the signal path before the light source;
• wherein the additional delay is determined according to a settling time of the light source.

A method for reducing standby power consumption in an optical transmitter, wherein the optical transmitter is configured to transmit a data signal for optical wireless communication;

• the method comprising the optical transmitter:
• emitting light by a light source for optical wireless communication based on an input signal comprising the data signal to be transmitted via the optical transmitter;
• turning on or off a power supply to the light source by a power switch;
• detecting the input signal on a signal path of the optical transmitter;
• sending a first trigger signal related to a start of transmission, SoT, of the input signal to a switch controller;
• controlling the power switch to power on the light source upon receiving the first trigger signal;
• preventing the data signal being transmitted during a first time interval after powering on the light source;
• and
• transmitting the data signal during a second time interval subsequent to the first time interval;
• wherein the first time interval is determined based on a settling time of the light source.