Scaleable data network router

H - Electricity – 04 – Q

Patent

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Details

H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2273224

In a broadband network comprising a plurality of edge switches interconnected by a plurality of tandem switches, IP packet data is routed by determining from each packet whether that packet forms part of a flow of packets. Where a packet is determined to be part of a flow, it is segmented into minicells for transmission over a permanent virtual channel established across the network for that flow. Where a packet is not determined to be part of a flow, a destination edge switch is identified for that packet which is then transported to that edge switch via a default permanent virtual channel. Permanent virtual channels for new flows are established at the network periphery by defining a succession of nodes and virtual channels (VCs) to be used to reach the destination of that flow.

Dans un réseau à large bande comprenant une pluralité de commutateurs de périphérie interconnectés par une pluralité de commutateurs en tandem, le paquet de données IP est acheminé en vérifiant, pour chaque paquet, s'il appartient à un flux de paquets. Lorsqu'un paquet appartient à un flux, il est segmenté en minicellules pour émission via un CVP (canal virtuel permanent) traversant le réseau. Lorsqu'un paquet n'appartient pas à un flux, on identifie, pour ce paquet, un commutateur de périphérie de destination, puis on transporte le paquet vers ce commutateur de périphérie via un CVP implicite. Des CVP des nouveaux flux établis sur la périphérie du réseau se définissent comme une succession de noeuds et de canaux virtuels permettant d'atteindre la destination de ce trafic.

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