An improved localization method for mobile wireless sensor networks

Localization technology is one of the most significant challenges for mobile wireless sensor networks (MWSNs). Various localization methods have been proposed for wireless sensor networks (WSNs) or MWSNs. Most localization methods for WSNs are not suitable for MWSNs, while the methods for MWSNs are lack of accuracy. The accuracy of range-based localization methods depends greatly on the accuracy of the range estimated. To overcome the interference of signals and improve the localization accuracy, an improved localization method is put forward for MWSNs. In the method, time slots assignment and two-way time of-flight (TW-ToF) method are used for improving range estimation and nodes localization. The simulation results show that the new localization method improves the accuracy, compared to the existing localization methods.