An improved expert intelligent PID algorithm in AQM network

The traditional PID controller parameters are hard to tune timely under the rapid changes of the dynamic network circumstances, which affect the PID algorithm´s control effects on network data flows. To alleviate the problem, a novel AQM algorithm based on PID controller is proposed, called the improved expert intelligent PID algorithm (IEI-PID). By combining expert knowledge with PID and adding more detail control rules, the algorithm receive better control effect. The NS2 simulation has been done to compare IEI-PID with classic PID algorithm (CPID) and expert intelligent PID algorithm (EI-PID), and the former has superior performance.