Patent ID: 8948601
Filing Date: 2015-02-03
Classification: H04B

Abstract:
1. 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.