Research and Implementation of the Localization Algorithm Based on RSSI Technology

The efficiency of sensor localization is a key issue in the Internet of things. There are possibilities for improvements in existing sensor localization systems, such as design complexity, cost. To address these issues, a location algorithm based on Distributed Range-Free Localization (DRFL) is proposed. In our positioning system can be composed by some single species node which can send and receive radio frequency signal, so it reduces the hardware requirements for the system. With this algorithm, system designed by us computes the anchor node weights with the RSSI values of anchor nodes and unknown nodes. Finally, the system acquires the data of unknown node localization with the weights and data of the anchor nodes. In this paper, a prototype was implemented to evaluate the algorithm. The results of experiments were shown that our system was stable. The algorithm, which had a little loss in sensor localization accuracy, had an effect on reducing the account of anchor nodes in the system.