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

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. Keywords -T raffic control (communication), simu- lation, fuzzy control, communication system perfor- mance, Internet