Avaliação de desempenho do protocolo TCP em redes wireless local: com e sem o uso de controladores

Abstract

Local networks of wireless computers are extremely susceptible to interference and loss of power radios within range. There are two structures of wireless local area networks: using controllers or not. Controllers Wireless LAN equipment owners are technology companies, managing a large quantity of radios (access points) simultaneously in an integrated and coordinated, presumably ensuring better performance of the assets of Wireless LANs and consequently providing time transmission of TCP segments better than those submitted by local wireless networks that do not use the controllers. For this study, we sought through experiment, making a comparison between the performance of wireless networks with or without use of controllers. The use of controllers in wireless networks is recommended by the increased stability of Wi-Fi signal in the cell, due to resource management of the transmitting signals in relation to the elements in the environment of propagation of the radio signal at the frequency 2.4 GHz free Meanwhile , the non-use of such devices, ultimately lead network administrators to serve the coverage area of the wireless signal, with the distribution of AP's individual invariably compete client hosts and can interfere with the signals from each other. Experimentally, samples were obtained broadcasts TCP segments, that were statistically assessed that the performance of transmissions in wireless networks with the use of controllers and without the use of these in small-office environments. The results were analyzed using ANOVA supported by the Tukey test.