A sectorizatiion technique for high-speed optical wireless communication

An apparatus for use in an optical wireless communication, OWC, system, the apparatus comprising:

• a wide beam light source;
• two or more narrow beam light sources each configured to emit in a different direction, wherein a combined field-of-view, FoV, of the narrow beam light sources is covered by a FoV of the wide beam light source;
• a plurality of switches each configured to turn on or off a corresponding one out of the wide beam light source and the two or more narrow beam light sources individually;
• a receiver configured to receive one or more feedback signals from a remote device;
• and
• a controller configured to:
• control the plurality of switches via a control signal;
• update the control signal based on the one or more feedback signals received by the receiver;
• carry out a beam selection procedure by sending test signals via the wide beam light source and one or more narrow beam light sources to the remote device to enable a selection of one out of the narrow beam light sources for establishing data communication with the remote device,
• wherein during the beam selection procedure the controller is configured to set the control signal to:
• turn on the wide beam light source;
• and simultaneously,
• turn on at most one of the narrow beam light sources;
• and wherein the wide beam light source and the receiver are configured to maintain a low speed bi-directional signaling link with the remote device to assist the beam selection procedure.