A queue growth rate based flow control algorithm

In this paper, we propose a queue growth rate based explicit rate (QGER) feedback flow control algorithm for ABR flow control in ATM networks. The novel characteristics in QGER are: (1) considering the link input rate and queue growth rate simultaneously to determine the traffic load, the congestion status and the fair share of available bandwidth; (2) monitoring the link input rate at the egress of the switch output queue; and (3) introducing a parameter, which is linked to the measurement interval, the round trip time, and the number of active ABR connections, to calculate and allocate the available bandwidth proportionally and fairly to the active ABR connections. Simulation results demonstrate that the network performance is improved significantly and the proposed QGER algorithm is efficient, robust, and simple. The paper gives an introduction, describes the QGER algorithm, presents some simulation results, and finally draws some conclusions.