Behavior and performance of Fuzzy-RED AQM algorithm in best-effort networks

Abstract In this paper we shortly discuss the need for improved congestion control in the Internet and concentrate on performance analysis and tuning issues of RED (Random Early Detection)-like AQMs (Active Queue Management) algorithms. We revisit the prin-ciples of Fuzzy-RED and its linear counterparts and examine their advantages and possible shortcomings. We also perform extensive simulations in various net-work environments and compare the performance of the RED and Fuzzy-RED algorithms. Also real net-work data is used to support the simulation studies. Based on our simulations we conclude that compared to RED, Fuzzy-RED or linear PD-RED are more ro-bust and less affected by network delay and changes in the network environment. The results also conclude the difficulties when comparing different scenarios