An Improved Node Localization Algorithm Based on Positioning Accurately in WSN

Abstract

Node localization technology, as an important technology of wireless sensor networks communication, whether it can accurately locate is the most important prerequisite to support site of the monitoring information. Due to the development of localization technology is affected by environment factor, localization precision and energy consumption, so how to reduce error and improve positioning accuracy of node is the focus of the current research. DV-hop (Distance Vector-hop) is put forward to solve the problem effectively, which can effectively use beacon nodes position to estimate unknown nodes position and improve nodes abilities of positing. For this, the paper proposes the IMDV-hop algorithm. Considering average distance of the whole network is replaced by average distance of beacon nodes, which results in decline in the localization accuracy, so it gives new average hop distance Formula in order to effectively reduce error between whole network average hop distance and real distance values. Then, average distance of the whole network is modified by introducing proportional parameter to make it approach the true distance for achieving the improvement of the positioning accuracy. The results show that the IWDV-hop (Improved Weighted Distance Vector-hop) algorithm to improve positioning accuracy of nodes and reduce positioning error is effective.