Method, device and data communication system for multilink...

Details Method, device and data communication system for multilink... Method, device and data communication system for multilink...

H - Electricity

04

L

H04L 12/403 (2006.01) H04L 12/24 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2219524

A control station (8) is coupled to a plurality of tributary devices (16, 18, 20) by way of at least one high speed broadcast downstream data channel (9) and more than one shared lower speed upstream data channels (11, 13). The control station (8) broadcasts data to all the tributary devices (10, 16, 18) and selects a channel for a specific tributary device (16, 18, 20) to respond to a poll. After polling, the tributary device (10, 16, 18) changes the tributary device transmitter (42) to the frequency of the selected channel. The tributary device (16, 18, 20) either sends data to send to the control station (8) or sends a negative acknowledge to the control station (8). If a negative acknowledgment was transmitted, the control station (8) notifies the control station transmitter (10) that the channel is idle.

Une station de commande (8) est couplée à une pluralité de dispositifs tributaires (16, 18, 20) par l'intermédiaire d'au moins un canal (9) de données aval de diffusion à grande vitesse et de plus d'un canal (11, 13) de données amont partagé à vitesse plus faible. Ladite station de commande (8) diffuse des données à tous les dispositifs tributaires (10, 16, 18) et sélectionne un canal pour un dispositif tributaire spécifique (16, 18, 20) afin de répondre à une interrogation. Après interrogation, le dispositif tributaire (10, 16, 18) modifie l'émetteur (42) de dispositif tributaire à la fréquence du canal sélectionné. Le dispositif tributaire (16, 18, 20) envoie des données à transmettre à la station de commande (8) ou envoie un accusé de réception négatif à la station de commande (8). Si un accusé de réception négatif est transmis, la station de commande (8) informe l'émetteur (10) de la station de commande que le canal est inactif.

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