Method and apparatus for per traffic flow buffer management

Details Method and apparatus for per traffic flow buffer management Method and apparatus for per traffic flow buffer management

H - Electricity

04

L

H04L 12/56 (2006.01) H04B 1/66 (2006.01) H04L 12/24 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2254104

A method of managing oversubscription of a common buffer resource shared by a number of traffic flows in a cell switching network in response to the utilization of the common buffer resource. A buffer utilization threshold is established for each of the traffic flows. As new cells arrive, the global usage of the buffer resource is monitored. As the buffer utilization increases, the thresholds for each of the traffic flows are dynamically adjusted based upon the global usage of the buffer. Aggressive buffer allocations are scaled back when necessary, thereby leaving space for traffic flows which are relatively empty. In one embodiment, the thresholds are coded in mantissa and exponent form so that the scaling is accomplished by adjusting the exponent value.

L'invention concerne un procédé permettant de gérer le surabonnement d'une ressource tampon commune partagée par un certain nombre de flux de trafic dans un réseau de commutation cellulaire en réponse à l'utilisation dudit tampon. Un seuil d'utilisation du tampon est défini pour chaque flux de trafic. Quand de nouvelles unités arrivent, l'utilisation globale du tampon est contrôlée. Si l'utilisation augmente, le seuil de chaque flux est dynamiquement réglé sur la base de l'utilisation globale du tampon. Les attributions de tampon agressives sont ramenées à une échelle inférieure si nécessaire, ce qui laisse la place pour les flux de trafic relativement vides. Dans l'un des modes de réalisation, les seuils sont codés sous forme de mantisse et d'exposant, ce qui permet de régler l'échelle en réglant la valeur de l'exposant.

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