Research on Localization Algorithm of Wireless Sensor Networks Based on IoT

Abstract

Wireless Sensor Networks (WSNs) are multihop self-organizing network systems formed by a large number of sensor nodes deployed in the monitoring area. It is an important technical form of the underlying network of the Internet of Things (IoT). The sensor nodes localization is the premise and hinge to the uses of WSNs. The hop-count of the inter-nodes obtained by the conventional Distance Vector Hop (DV-Hop) localization algorithm is always an integer. Therefore, the connectivity between nodes they described is not sufciently accurate. The compute errors of the separation distance between unknown anchor nodes are signicant. This is the main reason. In the paper, the concept of pseudo hop is raised, and the improved accuracy of hop-relationship between nodes is obtained based on energy. Simulation indicate that the improved algorithm enormously advance the localization accuracy of unknown nodes. Moreover, the algorithm has lower requirements on the quantity of beacon nodes and the communication radius, which primely saves energy consumption and costs.