H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/10 (2006.01) H04B 10/08 (2006.01) H04B 10/12 (2006.01) H04Q 7/22 (2006.01)
Patent
CA 2212556
The cells of a wireless communications system can be subdivided into smaller subcells, in each of which the available radio frequencies can be re-used to allow denser use of the system. To avoid having to run hard-wired communications links to broadcast antennas of the subcells, substantially unguided, free-space, optical communication is used between the antenna that formerly served the cell and the subcell antennas. The existing hard-wired connection from the central antenna to the remainder of the wireless communications system infrastructure continues to be used for communication to and from the cell.
Les cellules d'un système de télécommunications sans fil peuvent être subdivisées en sous-cellules plus petites, dans chacune desquelles les fréquences radioélectriques disponibles peuvent être ré-utilisées afin de permettre une utilisation plus dense du système. Afin d'éviter le recours à des liaisons câblées pour les communications avec les antennes de radiodiffusion des sous-cellules, on utilise la transmission optique en espace libre, essentiellement sans guide, entre l'antenne qui servait auparavant la cellule et les antennes de sous-cellules. La connexion câblée reliant l'antenne centrale au reste de l'infrastructure du système de télécommunications sans fil continue de servir pour les communications à destination et en provenance de la cellule.
At&t Corp.
Kirby Eades Gale Baker
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