Logical coordinate assignment for geographic routing in wireless sensor networks

In this paper, we propose a distributed protocol to build a logical coordinate system based on the hop counts of each node to four selected landmarks, and the real location information is not needed. Our designed protocol uses the sink node as one of the landmarks and then selects three other sensor nodes near the corners of the sensor network as landmarks. The simulation results show that our proposed protocol has the superior performance in packet delivery ratio, average hop counts among nodes, and communication overhead to previous works.