Abstract:

An adaptive fair queue management algorithm-adaptive flow random early detection (AFRED) is proposed to protect transfor control protocal(TCP) flows in the presence of user data protocal (UDP) flows and to provide flow fairness. By dynamically varying the threshold of each flow, that could be allowed into the buffer and the drop probability, the algorithm can protect TCP flows effectively and improve the fairness of the system and the efficiency of the bandwidth utilization. The analysis and simulations indicate that the implementation complexity of AFRED is comparable to flow random early detection (FRED), but its performance is better than FRED.

Key words: random early detection, flow random early detection, buffer management