Uma comparação entre algoritmos de detecção de defeitos para redes móveis sem fio

Abstract

A wireless mobile network is characterized by shortage of resources, such as transmission range and energy consumption. This network has the advantage to use all the potencial of mobile devices, like PDAs and portable computers, for example. On the other hand, these networks are more vulnerable to errors and failures. However, techniques of fault tolerance can be used to skirt them. The failure detector is a distributed algorithm that supplies informations about failures suspicion in monitored components. The failure detector is an important building block for the implementation of fault tolerance techniques. In this context, this work reviews the characteristics of the main failure detection algorithms for wirelessmobile networks and compare them through tests carried out in a simulator.