GOAFR plus-ABC: Geographic routing based on Adaptive Boundary Circle in MANETs

In mobile ad hoc networks, GOAFR+ (Greedy Other Adaptive Face Routing Plus) has a strong point that guarantees the packet delivery to the destination with low cost by combining greedy forwarding and face routing. In face routing mode, GOAFR+ uses the boundary circle to restrict a searching area. However, since the boundary circle is used without any location information of neighbors, it caused unnecessary expansion of boundary circle frequently. In this paper, we propose an efficient GOAFR+ based on adaptive boundary circle called GOAFR Plus-ABC (Greedy Other Adaptive Face Routing plus Adaptive Boundary Circle) to minimize expansion of boundary circle by using location information of neighbors in face routing mode. Simulation results show that our proposed scheme outperforms GOAFR+ up to 15% in terms of forwarding cost.