An Enhanced AODV Route Repairing Mechanism in Wireless Ad-Hoc Sensor Network

—Ad hoc On-demand Distance Vector (AODV) routing protocol has been widely applied in Wireless Ad-hoc Sensor Networks (WASN). Link breaks often occur in WASN due to the mobility of nodes or other reasons. Only after a link break detected, the route repair scheme in AODV will be initiated to keep the connectivity of network. In this paper, we propose an enhanced Preemptive Local Repairing Mechanism (PLRM) for AODV, which adopts the preemptive link break avoidance by monitoring link quality and other performance degradations. It allows for reducing control overhead and route length caused by the repairing process. Therefore, compared with other improved AODV route repairing schemes, PLRM shows the better performance by the simulations, in terms of packet delay, control overhead and packet delivery ratio in WASN.