PIDS FOR CONGESTION CONTROL IN INTERNET USING OPNET

摘要

This paper presents some simulation-based examples used at graduate level, so that engineering students understand the problems caused by congestion in computer networks, and some possible solutions. This is a necessity, as fast and reliable computer links are needed, but there are situations when congestion happens in those links, caused by fluctuations in the network delay and the number of users. The methodology presented here allows students to learn the importance of the Quality of Service (QoS) and how it depends on the methods used to solve the congestion problem. This work presents a combined approach of ready and self-programmed methods combined with tutorials using OPNET and MATLAB. Different approaches for dealing with congestion are considered: Drop Tail, RED and PIDs.