A reactive access control scheme at UNI for congestion control in ATM-based B-ISDN

A reactive access control scheme, which controls effectively B-ISDN congestion, is proposed. The increasing number of active traffic sources results in increasing amount of feedback traffic in the current congestion control schemes. The proposed scheme resolves the problem using the generic flow control (GFC) field as a feedback notifier which informs the congestion state from a network node to a broadband network termination (B-NT) system, and includes a decision method on the actual network congestion state. We evaluate the performance of the proposed scheme through computer simulation. We compare the performance of the proposed scheme with that of the scheme using leaky bucket. As a result, the proposed scheme has the lower probability of overflow at the node output buffer with the longer cell delay at the B-NT system.