An optimized DV-hop localization algorithm using average hop weighted mean in WSNs

In wireless sensor networks, several localization algorithms have been proposed to accurately locate nodes. These algorithms can be categorized into two main families: range-based and range-free. Algorithms using the range-based technique are mainly based on exact computation of the distance or the angle between two nodes (i.e., transmitter and receiver) in the network. Thus, the position can be obtained using trilateration or triangulation. Methods using the range-free technique, however, use only the network connectivity information between nodes. Nodes use the positions of the anchors; no measure of distance or angle is used. Therefore, these algorithms can only provide estimated nodes positions. In this paper, we focus on algorithms that use the range-free technique, especially DV-Hop algorithm, and we present an improved DV-Hop localization algorithm for WSNs. Simulation results show that the proposed algorithm can reduce the localization error.