The Rise of Magnetic Positioning: An Emerging and Infrastructure Free Solution for Indoor Positioning

Abstract

Existing indoor positioning systems require some infrastructure setup, e.g., WiFi or Bluetooth. The maintenance cost of such systems makes them not easy to deploy everywhere. In this project, our goal is to develop an infrastructure freesolution for the Indoor Positioning System (IPS) using magnetic field. To build an infrastructure free solution, we first build a magnetic footprint database for the targeted environment. Given the footprint database, we can estimate a user location based on her magnetic trajectory, where the estimation is done by a Dynamic Time Warping (DTW) like algorithm. In addition, we also study some pruning strategies to further improve the computation time. Besides the technical development, we also attempt to run the system in real scenarios. One testing case is to use the indoor positioning in our university library. We design a prototype system, called BookFinder, that can help people to find the book’s position and guide them to the destination by Augmented Reality. Lastly, we also conduct quite a few of experiments to confirm the robustness of the system design. In summary, the infrastructure free solution still has room for improvement but it definitely has a bright future.