International Organization for Standardization of aggressive fairness control applied to Resilient Packet Ring (RPR) in a standardized IEEE 802.17 (AM: Aggressive Mode) method has a problem of deterioration in the asymmetric overload the processing capacity. When the present invention eliminated their jam in the jam to be related to the aggressive fairness control method improved to improve the lowered processing capability resulting from a conventional aggressive fairness control method of the problem node sufficiently notified of the congestion off with the top node, and the top node being notified of this is to prevent the loss of bandwidth at the bottleneck link by setting allowable speed to control the transmission of their traffic at the maximum speed does not occur.
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