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Ad-hoc On demand Distance Vector (AODV) is an on-demand protocol, which is designed for ad-hoc networks. Compared with DSR, AODV has more routing overhead in high load networks with high speed of nodes' movement. We try to reduce AODV's routing load by preventing AODV from relying on route request flood more often in route discovery process. Simulation showed that the proposed way could reduce routing overhead and delay of routing in high load networks without any undesirable effects on throughput and delay of packets.