An improved DV-distance algorithm with assistant anchor for nodes localization in WSNs

Localization is a fundamental component in wireless sensor networks (WSNs). Traditional Ad hop positioning (APS) distributed, hop by hoplocalization approaches, which work as an extension of distance vector routing in order to provide approximate position for all nodes in a network, are easily affected by network topology structure, especially in irregular network. We propose a new localization strategy to solve this problem, in which some nodes are promoted asassistant anchors, and then get the localization of all the unknown nodes used both anchors and assistant anchors. In this algorithm, the error caused by the multihopdistancevector routingis decreased by employing assistant anchor nodes in the localization process, and the globallocalization accuracy can be improved obviously. Experimental results have shown that, the proposed algorithm could improve the accuracy by 30% to 40%compared with the traditional APS distributed localization approaches.