Optical communication system that transmits and receives...

H - Electricity – 04 – B

Patent

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H04B 10/10 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2337763

A system and method for networked high-speed data communication through free space is described. The system includes one or more central networks, which contain one or more lasers modulated with high-speed data to illuminate with laser light areas surrounding the central network in which are located one or more user networks. The laser from the central network generates a radiation pattern that is sectored into horizontal and vertical sectors, and further divided into channels for each wavelength. Data coming from the user networks modulates a laser, which is transmitted as a collimated beam through free space back to the central network where it is received. Communication can be point-to-point, point-to-multipoint, multipoint-to-point, or multipoint-to- multipoint, and the point-to-multipoint communication can be broadcast, simulcast, or multicast.

L'invention concerne un système et un procédé de communication en réseau de données grande vitesse par l'espace libre. Le système comporte un ou plusieurs réseaux centraux contenant un ou plusieurs lasers modulés à l'aide de données grande vitesse pour éclairer avec de la lumière laser des zones entourant le réseau central dans lequel sont situés un ou plusieurs réseaux d'utilisateurs. Le laser provenant du réseau central produit un motif de rayonnement qui est découpé en secteurs horizontaux et verticaux, et divisé en outre en canaux pour chaque longueur d'onde. Des données provenant de réseaux d'utilisateurs modulent un laser, qui est transmis en retour comme faisceau collimaté par l'espace libre vers le réseau central, où il est reçu. Les communications peuvent être point à point, point à multipoint, multipoint à point ou multipoint à multipoint, et les communications point à multipoint peuvent être diffusées, diffusées simultanément ou à mutidiffusées.

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