Method and system for indoor wireless optical links

An indoor wireless optical communication system, the system comprising:

• a user unit;
• and
• a central unit configured to establish a bi-directional optical communication link over a collimated invisible light beam to enable transmission of wireless communications between a remote communication device and the user unit,
• wherein the user unit comprises a first optical transmitter to transmit optical signals over the bi-directional optical communication link and a first optical receiver to receive optical signals transmitted from the central unit over the bi-directional optical communication link,
• wherein the central unit comprises a visible light source configured to produce a collimated visible light beam to enable alignment of the user unit and the central unit upon establishment of the bi-directional optical communication link,
• wherein the user unit comprises a user unit window, to reflect back a portion of the visible light arriving from the central unit,
• wherein the central unit comprises a central unit window, to enable creation of a first light spot, created by light that propagates from the visible light source of the central unit, and a second light spot, created by light that propagates from the visible light source of the central unit and reflected back from the user unit window;
• and
• the system comprises a positioning unit configured to adjust a position of the user unit is adjusted until the first light spot and the second light spot overlap on the central unit window.