Increased capacity bidirectional dwdm network architecture...

H - Electricity – 04 – J

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H04J 14/02 (2006.01) H04N 7/173 (2006.01) H04N 7/22 (2006.01)

Patent

CA 2370762

A bidirectional dense wave division multiplexing (DWDM) cable television network architecture with frequency stacking system provides increased capacity in the reverse path. The combination of optical multiplexing, using dense wave division multiplexing, and RF multiplexing, using frequency stacking, significantly increases the efficiency of the return path in a bidirectional architecture. The ITU grid transmitters and the frequency stacking system may be located at the nodes, at the primary or secondary headends, or with the frequency stacking system at the node and the ITU grid transmitters at the primary/secondary headend.

Architecture bidirectionnelle de réseau de télévision câblée à multiplexage par répartition de densité de signaux (DWDM) possédant un système d'empilage de fréquences et permettant d'augmenter la capacité du réseau dans le trajet inverse. La combinaison de multiplexage optique, mettant en application un multiplexage par répartition de densité de signaux, et de multiplexage RF, mettant en application un empilage de fréquences, augmente considérablement l'efficacité du trajet de retour dans une architecture bidirectionnelle. Les émetteurs à grille UIT et le système d'empilage de fréquences peuvent être situés au niveau des noeuds, au niveau des têtes de station primaires ou secondaires, ou bien le système d'empilage de fréquences peut se trouver au niveau du noeud et les émetteurs à grille UIT au niveau de la tête de station primaire ou secondaire.

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