Real Time Location System with ZigBee

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Mihai Gheza's BSc Diploma Project at "Transilvania" University of Brasov, Romania

A prototype of RTLS (Real Time Location System) using the ZigBee wireless mesh networking protocol, Received Signal Strength (RSS) for distance estimation and Trilateration for positioning.

Studied with a Texas Instruments CC2420 Development Kit.

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Real Time Location System with ZigBee

  1. 1. Real Time Location System Case Study: ZigBee System-on-Chip Solution TRANSILVANIA UNIVERSITY OF BRAŞOV FACULTY OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE Study programme: Electrical Engineering and Computers - DIPLOMA PROJECT - PROJECT ADVISOR, GRADUATE, Prof. Dr. eng. MORARU Sorin Aurel GHEZA Mihai Alexandru   2009
  2. 2. Contents <ul><li>Objectives </li></ul><ul><li>Contributions </li></ul><ul><li>Proof of Concept </li></ul><ul><li>Real Time Location Systems (RTLS) </li></ul><ul><li>ZigBee Mesh Networking Protocol </li></ul><ul><li>Texas Instruments Hardware </li></ul><ul><li>Received Signal Strength (RSS) Method </li></ul><ul><li>Trilateration </li></ul><ul><li>Location Propagation Algorithm </li></ul><ul><li>Conclusions </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  3. 3. Objectives <ul><li>Study RTLS options with wireless mesh networking , distance & positioning methods </li></ul><ul><li>D etermine the possibilites using available market hardware </li></ul><ul><li>I nvestigate the accuracy of distance and positioning measurement s </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  4. 4. Contributions <ul><li>Studied ZigBee mesh networking, RSSI & trilateration algorithm </li></ul><ul><li>Created prototype of RTLS using Texas Instruments CC2420 DK </li></ul><ul><li>D emonstrat ed strong correlation between the RSS and distance </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  5. 5. Proof of Concept 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  6. 6. Real Time Location Systems <ul><li>Personnel Tracking (corporate environments) </li></ul><ul><li>Logistics (alternative to barcodes) </li></ul><ul><li>Hospitals (nearest medic) </li></ul><ul><li>Industrial & Home Automation (remotes) </li></ul><ul><li>Animal Tracking & Theft Prevention (cattle ranch) </li></ul><ul><li>Robotics </li></ul><ul><li>Military </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  7. 7. ZigBee Mesh Networking Protocol <ul><li>Self Healing Mesh Network (rerouting) </li></ul><ul><li>Reliable (O-QPSK, DSSS, CSMA-CA , FCS) </li></ul><ul><li>Cheap (X$, 2.4GHz) </li></ul><ul><li>Low Power Consumption (shelf battery) </li></ul><ul><li>Secure (AES) </li></ul><ul><li>Open Global Standard (ZigBee Alliance) </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  8. 8. Texas Instruments Hardware <ul><li>True single-chip RF transceiver ( 2.4GHz IEEE 802.15.4 compliant ) </li></ul><ul><li>DSSS baseband modem (250 kbps data rate) </li></ul><ul><li>Low current consumption (RX/TX ~ 18mA) </li></ul><ul><li>Digital RSSI / LQI support </li></ul><ul><li>Accesible Development Kit (~1500$) </li></ul><ul><li>Evaluation Module, Board & PC connections </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  9. 9. Received Signal Strength Method 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  10. 10. Trilateration Algorithm 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  11. 11. Location Propagation Step 1 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  12. 12. Location Propagation Step 2 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  13. 13. Location Propagation Step 3 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  14. 14. Location Propagation Step 4 17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  15. 15. Conclusions <ul><li>RTLS can be implemented using </li></ul><ul><ul><li>ZigBee Mesh Networking </li></ul></ul><ul><ul><li>Cheap Hardware Components </li></ul></ul><ul><ul><li>RSSI for Distance Estimation </li></ul></ul><ul><ul><li>Trilateration for Positioning </li></ul></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai
  16. 16. Finish <ul><li>Thank you! </li></ul><ul><li>Questions? </li></ul>17/06/2009 DIPLOMA PROJECT - GHEZA Mihai

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