Patent ID: 6405257
Filing Date: 2002-06-11
Classification: H04L,H04Q

Abstract:
A congestion control method for a network, said method comprising the steps:determining for a predetermined interval of time, a set of routes between a set of source node and destination node pairs in the network; allocating, for the predetermined interval of time, a set of maximum permitted rates to the determined set of routes, respectively; assigning, for the predetermined interval of time, a set of burst access thresholds to a set of service classes respectively, wherein the assigned burst access thresholds are less than or equal to the corresponding allocated maximum permitted rates; and controlling, at burst level, traffic accessing each of the source nodes based on the previously allocated set of maximum permitted rates and the previously assigned set of burst access thresholds comprises the steps of: detecting, at one of the source nodes, a beginning of a burst in the traffic; identifying, from among the set of service classes, the service class corresponding to the detected burst; identifying, from among the determined set of routes, the determined route corresponding to the detected burst; identifying, from among the assigned set of burst access thresholds, the burst access threshold corresponding to the identifies service class; admitting the detected burst when the total reserved peak packet rate for all bursts that are in progress in the identified determined route plus a peak packet rate of the detected burst is less than or equal to the identified burst access threshold; and rejecting the detected burst when the total reserved peak packet rate for all bursts that are in progress in the identified determined route plus a peak packet rate of the detected burst is greater than the identified burst access threshold.