Intelligent MultiPoint Relays Selection

In MANETs, routing protocols are needed to ensure reliable communications between nodes. They are classified in three categories according to how they establish the routes between any two distanced nodes. There are reactive, proactive or hybrid protocols. The OLSR (Optimized Link State Routing) belongs to the proactive category in which the relays are used to reduce the number of retransmitter nodes and hence to avoid the network flooding with the control traffic. Therefore, it is very important to ensure the maximum reliability for the selected relays in order to increase the performance of the network. In this article, to achieve this goal, we propose an intelligent new method based on dynamic selection of the MPR (MultiPoint Relay) sets construction process. According to constraints related to the nodes environment, we select from many strategies the one that it is the more suitable for being elected as MPR. In this article, two enhanced versions of the OLSR protocol are proposed. In the first one, we use the nodes mobility degree of the neighborhood to select the more suitable MPR. In the second one, we use the quantity of transiting traffic per node. In addition, extensive and rigorous simulations are made by a discrete event simulator to evaluate the efficiency of our approach. Key-Words: Mobile Ad hoc Networks (MANET), Mobility, MultiPoint Relay (MPR), OLSR Routing protocol.