Localization System based on Ultra Low-power Radio Landmarks

In this paper we present a novel indoor localization system using external reference landmarks as a guidance system for emergency responders. The landmarks are based on low-power wake-up nodes which can be integrated into smoke detectors. The radio wake-up technology is equipped in the system to extend the lifetime of landmarks. While in sleep mode our landmarks have an overall power consumption of 66 mu W making them ready-to-use in case of an emergency for up to 5 years. The landmarks are small and cost-efficient and may be integrated into the building infrastructure. The positioning is achieved by combining the radio ranging and IMU based dead reckoning to overcome the disadvantages of both systems. The experimental results show that the proposed system is able to outperform both standalone systems and meanwhile maintain the low power consumption.