A Weight-based DV-HOP Improved Localization Algorithm for Wireless Sensor Networks.

DV-Hop is one of the range-free localization algorithms using hop-distance estimation. However, it suffers from a large localization deviation and low localization accuracy. This paper proposed a weight-based DV-HOP improved algorithm. It improves the traditional DV-HOP algorithm mainly in the following aspects. First, it increases the calculation accuracy of hop counts. Second, it corrects the average hop distance calculated by the anchor node by using least square method. Third, the un-located nodes calculate the distance to other anchor nodes based on the link state with weights. The simulation results showed that the proposed algorithm significantly reduces the localization deviation, with a small increase in the node's computation and communication cost. It is superior to the existing DVHOP algorithm. [ABSTRACT FROM AUTHOR]