Análise de desempenho de algoritmos de controle de congestionamento TCP utilizando o simulador NS-2

Abstract

The significant increase of the devices connected to the world wide web also impacted the increase in traffic demand. Congestion occurs when the traffic demand is greater than the transmission capacity. The congestion control algorithms have been created to try to solve this problem by decreasing the transmission of data traffic when congestion occurs. The TCP Tahoe was the first congestion control algorithm designed to solve this problem. Over the years and with the increase of traffic demand, other congestion control algorithms such as TCP Reno, TCP Vegas, TCP NewReno, TCP SACK and TCP Fack were created. The objective of this work is to analyze algorithms of congestion control using simulator Network Simulator, simulator that is widely used for academic papers. The metrics used for analysis were: discharge, rate of incoming packets and use the links. The test scenarios simulated two topologies of the National Research Network (topology of the year 2013 and the current topology), which encompass all Brazilian states.