Fuzzy logic based multihop topology control routing protocol in wireless sensor networks

Reducing energy consumption has been a recent focus of wireless sensor network as it directly affects network lifetime. Geographical adaptive fidelity (GAF) is one of the well-known topology management multihop location-based routing protocols. Its main objective is to turn-off unnecessary sensor nodes while maintaining uninterrupted connectivity between communicating sensors. It is proved to be able to extend the lifetime of self-configuring systems by exploiting redundancy to conserve energy while maintaining application fidelity. Traditional GAF introduces unreachable corners; also the symmetric property is at stake thus providing with less network utility. In this paper, we propose a fuzzy logic based geographic routing protocol named FGAF-HEX to achieve higher energy optimization. Further, we use a GAF based Honeycomb Architecture to replace the traditional square grid with the hexagonal virtual grid. Simulation and analysis results show significant improvement in proposed work over traditional GAF in terms of various parameters, i.e., network lifetime and network connectivity. Results show that FGAF-HEX provides a substantial improvement in terms of various metrics as compared to traditional GAF.