Qualidade de serviço em redes Mesh sem fio baseada em roteamento oportunístico e códigos de rede.

Abstract

Among the different specializations of current wireless networks, Wireless Mesh Networks are characterized by the decentralization of the communication process, where access points are not available. Moreover, properties such as self-organization, self-discovery, selfhealing and self-configuration allow the deployment of network topologies in a simplified and agile way. However, the development of new solutions to provide Quality of Service is a challenging task due to characteristics of the wireless channel. Problems such as high interference in the transmission channel, low availability of bandwidth, high variation in the network conditions make its development much more complex than solutions for wired networks. One of the major restrictions of currently available solutions in the literature lies in the fact that mesh networks rely on traditional protocols. Such protocols do not take into account, during the routing process, the broadcast transmission nature of wireless networks. In this work, we propose a routing protocol for Wireless Mesh Networks with QoS support, named Multi-User Diversity Protocol with Quality of Service – MuDP-QOS. The MuDP-QoS uses two approaches for transmission based on the multi-user diversity concept (opportunistic routing and network coding) in a hybrid manner. Also, in order to perform the resource reservation, we use an adaptive QoS approach which allows the application defining a range for QoS parameters. Based on this, it is possible to perform an optmization in the resource reservation process according to the network restrictions.