wireless networking is one of the current attractive fields for researchers in current era. The ad hoc network is a separable part of wireless networking which facilitate the users to perform communication among mobile terminals with limited bandwidth. But as these networks did not follow any physical topology for installation therefore the risk of security attacks an threats are higher in ad hoc networks. Various attacks such a eavesdropping, spoofing, denial of service are difficult to detect in wireless ad hoc networks. So many researchers have been conducted in this field till now but most of them are not capable to achieve high level security of data plane in ad hoc wireless networks. A novel approach for securing data plane in AHNs has been developed under this study. The PRO-OLSR is a combination of fuzzy based system with OLSR routing protocol. The essential parameters like average delay, packet delivery ratio, direct trust and attack suspected ratio are used as an input membership function to fuzzy system. And on the Basis of the output of FIS the next hop for data delivery is elected. The simulation is done in MATLAB and results are generated to proves the proficiency of PRO-OLSR technique.