Localization of wireless sensor networks in the wild: pursuit of ranging quality
Networking June 2013
Localization is a fundamental issue of wireless sensor networks that has been extensively studied in the literature. Localization of wireless sensor nodes in the wild remains very challenging due to various interfering factors. A Combined and Differentiated Localization (CDL) is proposed approach for localization that exploits the strength of range-free approaches and range-based approaches using received signal strength indicator (RSSI). A critical observation is that ranging quality greatly impacts the overall localization accuracy. To achieve a better ranging quality, this method CDL incorporates virtual-hop localization, local filtration, and ranging-quality aware calibration. CDL has been implemented and evaluated by extensive real-world experiments and large-scale simulations. The experimental and simulation results demonstrate that CDL outperforms current state-of-art localization approaches with a more accurate and consistent performance.