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In Ad Hoc networks, route failure may occur due to less received power,mobility, congestion and node failures. Many approaches have been proposed inliterature to solve this problem, where a node predicts pre-emptively the routefailure that occurs with the less received power. However, this approachencounters some difficulties, especially in scenario without mobility whereroute failures may arise. In this paper, we propose an improvement of AODVprotocol called LO-PPAODV (Link Quality and MAC-Overhead aware PredictivePreemptive AODV). This protocol is based on new metric combine more routingmetrics (Link Quality, MAC Overhead) between each node and one hop neighbor.Also we propose a cross-layer networking mechanism to distinguish between bothsituations, failures due to congestion or mobility, and consequently avoidingunnecessary route repair process. The LO-PPAODV was implemented using NS-2. Thesimulation results show that our approach improves the overall performance ofthe network. It reduces the average end to end delay, the routing overhead, MACerrors and route errors, and increases the packet delivery fraction of thenetwork.

Link Quality and MAC-Overhead aware Predictive Preemptive Routing Protocol for Mobile Ad hoc Network