This paper proposes the window-based congestion control mechanism using explicit feedback in TCP over ATM ABR service. The proposed scheme is based on notifying the network status as the free buffer length at the congested link to the IP station which informs the window rate by modifying the receivers' advertised window field in TCP ACK returning to the source. Results from simulation show that the proposed algorithm improves the fairness and stability of TCP connections in general network environments even if they have the different round trip times.
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