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AODV (Ad hoc On-Demand Distance Vector) routing protocol provides communication between mobile nodes with minimal control overhead and minimal route acquisition latency. It is well-known asa reactive routing protocol along with OLSR (Optimized Link State Routing). Its goal is to reducethe need for system-wide broadcasts to the furthest extent possible. To control network-wide broadcasts of RREQs, the source node uses an expanding ring search technique, which allows a search of increasingly larger areas of the network if a route to the destination is not found. In this paper, we investigate the effectiveness of this ring search scheme by comparing the number of routing messages during routing discovery procedure.