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Routing in wireless network is a key research area which establishes path between source and destination node pairs. In this paper, the authors have designed and evaluated an Energy-efficient and Fault tolerant Greedy Perimeter Stateless Routing (EFGPSR) protocol for wireless ad hoc network. The proposed protocol is divided into four phases: Fault testing phase, Planarization phase, Energy efficient greedy forwarding phase and Energy efficient perimeter forwarding phase. In fault testing phase, all nodes come to know about their fault free neighbours. Next is planarization phase which removes the crossing edges. Next are energy efficient greedy forwarding and perimeter forwarding phases.
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