Contents I. Introduction
Mobile Ad hoc Networks (MANETs) are infrastructure less and self-reconfigurable networks. MANETs are exploited in search and rescue, tactical, V2V, mobile IoT and mobile sensors applications. A routing protocol is required on each node to connect all the mobile radios in a multi-hop network. Optimized Link State Routing version 2 (OLSRv2) protocol is an adaptive proactive routing protocol for MANETs. OLSRv2, denoted here as OLSR, is a popular distributed routing protocol [1] and was tested in challenging scenarios [2], [3]. One drawback of OLSR is a poor estimation of the link quality leading to routes fluctuations and packet loss. As an example, Fig. 1 illustrates the instability of the OLSR routes (top panel) and the stability of the routes of the desired solution (bottom panel) for a particular case: source 9 to destination 22 in the static network topology given by first second of Anglova CP1 scenario [4] (Fig. 2 right) even without fading. In Fig. 1, OLSR oscillates between the direct route to node 22 when the Link Quality (LQ) is less than 50% and through the intermediate node 17 with link 9-17 (LQ=100%) and link 17-22 (LQ=100%). As explained in Section II, the route flapping occurs when the so-called Directional Air Time (DAT=1/link quality): DAT9−22 ≈ 2 is near the DAT9−17 +DAT17−22 ≈ 2. The direct route leads to a lower Completion Ratio (CR) of 50% compare to CR=100% for the longer route. The route is considered stable when the next hop is the same for the destination over a long period e.g., 10 to 20s.
