Projects: Asymmetric, Event-based Node Localization (Spotlight)

In this project, we formally describe, design, implement and evaluate a novel localization system, called Spotlight. Our system uses the spatio-temporal properties of well controlled events in the network (e.g., light), to obtain the locations of sensor nodes. We demonstrate that a high accuracy in localization can be achieved without the aid of expensive hardware on the sensor nodes, as required by other localization systems. We evaluate the performance of our system in deployments of Mica2 and XSM motes. Through performance evaluations of a real system deployed outdoors, we obtain a 20cm localization error. A sensor network, with any number of nodes, deployed in a 2500m2 area, can be localized in under 10 minutes, using a device that costs less than $1000. To the best of our knowledge, this is the first report of a sub-meter localization error, obtained in an outdoor environment, without equipping the wireless sensor nodes with specialized ranging hardware.

Members

Papers

  • T. He, J. A. Stankovic, R. Stoleru, Y. Gu, Y. Wu, "Essentia: Architecting Wireless Sensor Networks Asymmetrically," In Proceedings of Conference on Computer Communication (INFOCOM), 2008
  • R. Stoleru, T. He, J. A. Stankovic, D. Luebke, "A High-Accuracy, Low-Cost Localization System for Wireless Sensor Networks," In Proceedings of ACM Conference on Embedded Networked Sensor Systems (SenSys), San Diego, CA, 2005.
  • R. Stoleru, T. He, J. A. Stankovic, "Localization System for Outdoor Wireless Sensor Networks," In Proceedings of ACM Conference on Embedded Networked Sensor Systems (SenSys), demo paper, San Diego, CA, 2005.

Source Code Releases

  • TBD