Abstract: Based on equivalent active flow number estimation, we propose a novel Active Queue Management(AQM) schemne called
Approximate Fairness Dropping(AFD), which is able to achieve approximate fairness by containing misbehaved flows’ access
queue opportunity. Unlike most of the existing AQM schemes, AFD does not drop the packets whose arriving rate is within the
maximum admitted rate threshold, so it protects the well-behaved flows against misbehaved ones. Moreover, it improves
throughput and decreases queuing delay. Our simulations demonstrate that this new technique outperforms the current typical
AQM schemes and closely approximates the "ideal" case, where full state information is needed.

Key words: congestion control, active queue management, fairness, approximate fairness dropping, equivalent active flow