Hybrid wireless optical and radio frequency communication link

H - Electricity – 04 – B

Patent

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H04B 10/10 (2006.01)

Patent

CA 2397303

A hybrid wireless optical and radio frequency (RF) communication link utilizes parallel free-space optical and RF paths for transmitting data and control and status information. The optical link provides the primary path for the data, and the RF link provides a concurrent or backup path for the network data, as well as a reliable and primary path for the control and status information. When atmospheric conditions degrade the optical link to the point at which optical data transmission fails, the hybrid communication link switches to the RF link to maintain availability of data communications. The switch may occur automatically, based on an assessment of the quality of the optical signal communicated through the optical path.

L'invention concerne une liaison de communication optique hybride sans fil et une liaison de transmission par radiofréquence (RF) utilisant des trajets optiques et RF à espace libre parallèles destinés à transmettre des données et des informations de commande et d'état. La liaison optique fournit le trajet primaire pour les données, et la liaison RF fournit un trajet concurrent ou de réserve pour les données réseau, de même qu'un trajet fiable et primaire pour les informations de commande et d'état. Lorsque les conditions atmosphériques dégradent la liaison optique au niveau de l'emplacement où la transmission de données optiques échoue, la liaison de communication hybride passe en liaison RF afin de conserver la disponibilité des communications de données. La commutation peut se produire automatiquement, en fonction d'une analyse de la qualité du signal optique communiqué par l'intermédiaire du trajet optique.

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