Packet data flow control method and device

Details Packet data flow control method and device Packet data flow control method and device

H - Electricity

04

L

H04L 29/02 (2006.01) H04L 12/54 (2006.01) H04L 12/56 (2006.01) H04Q 3/42 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2233369

In packet data flow control wherein point-to-multipoint communication or point-to-point communication is performed in a network comprising one or a plurality of packet exchanges that respectively accommodate a plurality of communication terminals, reduction of the transmission bandwidth or lowering of transmission rate caused by local congestion is absorbed by providing buffers for absorbing difference between the transmission bandwidths of the upstream link and downstream links of these packet exchanges at each packet exchange. At the packet exchanges the transmission rate of the downstream links from the packet exchange is controlled in accordance with a first load data that is notified thereto from the downstream links and, if the difference of transmission bandwidth of the upstream link and downstream links cannot be absorbed by the buffer, a second load data is generated based on the first load data and the free capacity of the buffer and the upstream link of the packet exchange is notified of the second load data.

Dans un système de commande de flux de paquets de données où la transmission de point à multipoint ou de point à point se fait dans un réseau comprenant un ou plusieurs centres de commutation de paquets qui servent respectivement un certain nombre de terminaux de communication, la réduction de la largeur de bande de transmission ou l'abaissement du débit de transmission dû à l'encombrement local est absorbé au moyen de tampons qui permettent d'absorber la différence de largeur de bande de transmission entre la liaison d'amont et les liaisons d'aval de ces centres de commutation de paquets à chacun de ces centres. Aux centres de commutation de paquets, le débit de transmission des liaisons d'aval du centre de commutation de paquets est commandé conformément à une première information de charge provenant des liaisons d'aval et, si le tampon ne peut pas absorber la différence de largeur de bande de transmission entre la liaison d'amont et les liaisons d'aval, une deuxième information de charge est produite en fonction de la première information de charge et de la capacité libre du tampon, et la deuxième information de charge est transmise à la liaison d'amont du centre de commutation de paquets.

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