Method and router in a packet network with priority classes

H - Electricity – 04 – L

Patent

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

Patent

CA 2239714

A method and an equipment for packet prioritization when routing data packets. Several priority classes are defined for the packets (F), and a first threshold value (T1) and a second, higher, threshold value (T2) is defined for each priority class. In association with each packet, the oldest packet (F) of a given priority class is selected, and if the packet is older than the second threshold value (T2) of the priority class concerned, said packet (F) is discarded, and the next priority class is selected. If said packet (F) is older than the first threshold value (T1) of the priority class concerned, at least one packet of this priority class is transmitted until the oldest packet in the priority class is younger than the first threshold value (T1) of the priority class concerned, whereupon the next priority class is selected.

Procédé et matériel permettant l'établissement des priorités durant l'acheminement de paquets de données. Plusieurs classes de priorité sont définies pour les paquets (F), et une première valeur seuil (T1) et une seconde valeur seuil (T2), plus élevée, sont définies pour chaque classe de priorité. Associé à chaque paquet, le paquet (F) le plus ancien d'une certaine classe de priorité est sélectionné et, s'il est plus ancien que la seconde valeur seuil (T2) de la classe de priorité concernée, ledit paquet (F) est abandonné, et la classe de priorité suivante est sélectionnée. Si ledit paquet (F) est plus ancien que la première valeur seuil (T1) de la classe de priorité concernée, au moins un paquet de cette classe est transmis jusqu'à ce que le paquet le plus ancien de la classe soit plus récent que la première valeur seuil (T1) de la classe de priorité concernée. Puis la classe de priorité suivante est sélectionnée.

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