Flow control in a packet data communication system

H - Electricity – 04 – J

Patent

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H04J 3/16 (2006.01) H04J 3/22 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2516442

A communication system (200) that includes multiple nodes (202, 210) controls a flow of data from a first node (202) to a second node (210) without relying on an estimate of a rate at which data is drawn from a buffer (216) of the second node and such that an overflow and an underflow of the buffer is avoided. The second node determines multiple flow control parameters, including a current occupancy (Q) of the buffer and an upper threshold (U) and a lower threshold (L) for an occupancy of the buffer and determines a desired data rate (r) based on the multiple flow control parameters. The desired data rate can be used to adjust a data rate for the flow of data. In another embodiment, the communication system further dynamically controls a rate at which flow control messages are conveyed by the second node to the first node.

L'invention concerne un système (200) de communication qui comprend des noeuds multiples (202, 210), et régule un flux de données d'un premier noeud (202) vers un second noeud (210) sans se référer à une estimation de la vitesse à laquelle les données sont extraites d'un tampon (216) du second noeud, et de manière à éviter un dépassement ou un soupassement de la capacité du tampon. Le second noeud détermine une pluralité de paramètres de régulation de flux, notamment l'occupation momentanée (Q) du tampon, ainsi qu'un seuil supérieur (U) et un seuil inférieur (L) d'occupation du tampon, et détermine un débit de données (r) souhaitable à partir de cette pluralité de paramètres de régulation de flux. Le débit de données souhaitable peut être utilisé pour définir un débit du flux de données. Dans une forme de réalisation différente, ce système de communication régule en outre de manière dynamique la vitesse de transmission des messages de régulation de flux du second noeud vers le premier noeud.

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