Packet switching system, packet switching network and packet...

H - Electricity – 04 – L

Patent

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Details

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

Patent

CA 2238114

Upon initialization, a VPC is set up between edge nodes. A control processor of each node creates an IP address/VPC mapping table using IP routing information and an address mapping table mapping correspondence between IP addresses and ATM addresses and supplied by a network management system. A gateway assigns a VCC to each packet input to the network. A sending-side edge node inputs the packet to the VPC corresponding to its destination by referring to the IP address/VPC mapping table. A transit node performs packet switching over VP. A receiving-side edge node transfers each packet to the gateway corresponding to its destination. If a series of packets meet a predetermined condition in a given edge node, its control processor sends VCC information to input interfaces of the edge node so that the packets are switched by an ATM switch in the edge node without intervention of the control processor.

€ l'initialisation, une connexion de trajet virtuel (VPC) est établie entre les noeuds périphériques. Un processeur de commande de chaque noeud crée une table de correspondance VPC/adresse IP en utilisant de l'information de routage IP et une table de correspondance entre les adresses IP et les adresses ATM, provenant d'un système de gestion de réseau. Une passerelle affecte une connexion de canal virtuel (VCC) à chaque paquet qui entre sur le réseau. Un noeud périphérique côté expédition transmet le paquet à la VPC correspondant à sa destination en se reportant à la table de correspondance VPC/adresse IP. Un noeud de transit effectue la commutation de paquets sur le trajet virtuel. Un noeud périphérique côté réception transfère chaque paquet à la passerelle correspondant à sa destination. Si une série de paquets répondent à une condition prédéterminée d'un noeud périphérique donné, son processeur de commande envoie l'information de VCC aux interfaces d'entrée du noeud périphérique de sorte que les paquets soient commutés par le commutateur ATM du noeud périphérique sans intervention du processeur de commande.

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