An agent based congestion control and notification scheme for TCP over ABR

̋ We overview in this paper the enhancement of TCP’s congestion control mechanisms using Explicit Congestion Notification (ECN) over ATM networks. Congestion is indicated by not only packet losses as is currently the case but an agent implemented at the network’s edge as well. The agent bridges the gap between the ATM layer and the TCP layer in the protocol stack at the receiver end and coordinates the congestion control algorithms of the TCP transport protocol and the ATM cell-oriented switching architecture. The novel idea uses ABR rate-based flow control to notify congestion and adjust the creditbased window size of TCP.