Abstract:

To solve the accurate localization of three-dimensional wireless sensor networks, a three-dimensional localization algorithm based on particle swarm optimization (3DPSO) was presented. In order to improve the efficiency and precision of localization method, a distancebased objective function to evaluate the fitness of particles was presented. Besides, in order to speed up the convergence rate of the localization result, the search space of the particles was limited. Finally, in the case of the ideal and ranging error environment, the feasibility and effectiveness of the algorithm was proved. Compared to the typical schemes, Simulation results reveal that this algorithm provides better robustness and high positioning accuracy.

Key words:  wireless sensor networks (WSNs); node localization; anchor node; particle swarm optimization (PSO) algorithm