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Rate based congestion control promises effective traffic management for ABR service class suitable to data communications in ATM networks. The rate based congestion control algorithm dynamically regulates transmission rate of source end system according to feedback information from the network. In this paper, the authors described two rate based congestion control algorithms, Explicit Forward Congestion Indication (EFCI) and Explicit Rate Indication Congestion Avoidance (ERICA) developed by ATM forum. From the simulation results, they can observe that, both have cell drop problem at intermediate switch in ATM network. They then propose an improvement to ERICA scheme to overcome this problem.
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