Quality of Service Routing in a MANET with OLSR

Ad hoc wireless networks have enormous commercial and military potential becauseof their self-organizing capacity and mobility support. However, some specificities of these networkssuch as radio interferences and limited resources make more complex the quality of service(QoS) support. Indeed, on the one hand, the bandwidth offered to users is strongly affected byradio interferences. On the other hand, flooding information in such a network must be optimizedin order to save resources. Therefore, we propose in this paper, a solution taking into accountradio interferences in mobile ad hoc network routing and optimizing flooding. This solution isbased on a modified version of the OLSR routing protocol that considers bandwidth requestsand radio interferences in the route selection process while providing a very efficient flooding.A comparative performance evaluation based on NS simulations shows that despite the overheaddue to QoS management, this solution outperforms classical OLSR in terms of QoS perceivedby the users (e.g. bandwidth amount granted to a flow and delivery rate). The efficiency of theoptimized flooding is equal to that provided by the native version of OLSR.