FEEDBACK-TYPE RATE-BASED CONGESTION CONTROL WITH ADAPTIVE PARAMETER

The rate-based congestion control is one of the most promising schemes far available bit fate (ABR) service in asynchronous transfer mode-lo cal area networks (ATM-LANs). This paper points out the possibility of goodput degradation when the number of connections through a bottlene ck queue increases with the binary feedback-type rate-based congestion control where transmission rate is changed on the basis of additive i ncrease-multiplicative decrease principle. Then, to overcome this prob lem, a feedback-type rate-based congestion control with adaptive param eter is proposed in which rate incremental factor is adapted according to the number of active connections which can be detected by observin g the fluctuation of queue length. Simulation results show that the pr oposed scheme has fine power characteristics for any number of connect ions sharing the bottleneck node.