Allocation of bit streams for communication over...

H - Electricity – 04 – L

Patent

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Details

H04L 12/50 (2006.01) H04L 12/28 (2006.01) H04L 27/26 (2006.01) H04J 3/06 (2006.01) H04L 7/04 (2006.01) H04N 7/58 (2006.01)

Patent

CA 2460581

An architecture for providing high-speed access over frequency-division multiplexed (FDM) channels allows transmission of ethernet frames and/or other data across a cable transmission network (105) or other form of FDM transport. The architecture involves downstream and upstream FDM multiplexing techniques to allow contemporaneous, parallel communications across a plurality of frequency channels. Also, the modulation indices of various upstream frequency channels may be different, but a plurality of upstream channels may be used to carry a single data flow generally in parallel. The upstream data flow is fragmented into blocks and formed into superframes to allow transmission over at least one upstream frequency channels. When a plurality of upstream frequency channels are utilized, the superframes facilitate the possibility of having different modulation indices on the plurality of frequency channels.

L'invention concerne une architecture permettant d'obtenir un accès rapide sur des canaux multiplexés par répartition en fréquence. Cette architecture assure la transmission d'images éthernet et/ou d'autres données sur un réseau de transmission par câble (105) ou une autre forme de transport par multiplexage par répartition en fréquence. Cette architecture implique des techniques de multiplexage par répartition en fréquence aval et amont pour assurer des communications parallèles, contemporaines sur une pluralité de canaux de fréquences. En outre, les indices de modulation des divers canaux de fréquence amont peuvent être différents, mais il est possible d'utiliser divers canaux amont pour transporter un seul flux de données généralement en parallèle. Le flux de données amont est fragmenté en blocs et formé en supertrames pour permettre la transmission sur au moins un canal de fréquence amont. Lors de l'utilisation d'une pluralité de canaux de fréquences amont, les supertrames permettent d'avoir plus facilement différents indices de modulation sur la pluralité de canaux de fréquences.

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