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A knowledge-sharing event investigating current opportunities and  the future of context-aware information delivery on mob...
AIMS <ul><li>Explore the potential for using active RFID tags as navigation beacons </li></ul><ul><li>Mark-up of indoor & ...
Approach <ul><li>Use Active Wavetrend RFID tags as beacons  </li></ul><ul><li>433 MHz, unique ID and Site Code </li></ul><...
Tag-A Tag-B Tag-C Tag-D RSSI-C RSSI-A RSSI-D RSSI-B RSSI-C RSSI-D RSSI-B RSSI-A
Demonstrator Overview <ul><li>measure tag signal strength at set distances from reader </li></ul><ul><li>analyse suitabili...
Example Data: RSSI v. Range
Example Data: Repeatability
Example Data: Variability
Issues <ul><li>readers and tags directionality </li></ul><ul><li>non-monotonicity of RSSI v. range </li></ul><ul><li>older...
Preliminary Conclusions <ul><li>the data implies location estimation is possible … but will be a challenge </li></ul><ul><...
Next Steps <ul><li>multiple readers </li></ul><ul><li>map RSSI in space (contour maps) </li></ul><ul><li>Environmental fac...
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LUCID demonstrator: Active RFID navigation

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An exploration into the use of Active RFID tags for navigation

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Transcript of "LUCID demonstrator: Active RFID navigation"

  1. 1. A knowledge-sharing event investigating current opportunities and the future of context-aware information delivery on mobile devices. Active-RFID Navigation
  2. 2. AIMS <ul><li>Explore the potential for using active RFID tags as navigation beacons </li></ul><ul><li>Mark-up of indoor & outdoor spaces </li></ul><ul><li>Help mobile users to discover “services” </li></ul><ul><li>Assist with navigation in unknown spaces </li></ul>
  3. 3. Approach <ul><li>Use Active Wavetrend RFID tags as beacons </li></ul><ul><li>433 MHz, unique ID and Site Code </li></ul><ul><li>Measure received signal-strength (RSSI) </li></ul><ul><li>Fixed tags, mobile RFID reader </li></ul><ul><li>RSSI v. range, repeatability, variability, ageing? </li></ul><ul><li>Inverse look-up for position estimation? </li></ul>
  4. 4. Tag-A Tag-B Tag-C Tag-D RSSI-C RSSI-A RSSI-D RSSI-B RSSI-C RSSI-D RSSI-B RSSI-A
  5. 5. Demonstrator Overview <ul><li>measure tag signal strength at set distances from reader </li></ul><ul><li>analyse suitability for reverse lookup (repeatability) </li></ul><ul><li>mapping of spaces (RSSI curves different) </li></ul><ul><li>reverse lookup algorithms </li></ul>
  6. 6. Example Data: RSSI v. Range
  7. 7. Example Data: Repeatability
  8. 8. Example Data: Variability
  9. 9. Issues <ul><li>readers and tags directionality </li></ul><ul><li>non-monotonicity of RSSI v. range </li></ul><ul><li>older tags less reliable </li></ul><ul><li>impact of environment - clutter </li></ul>
  10. 10. Preliminary Conclusions <ul><li>the data implies location estimation is possible … but will be a challenge </li></ul><ul><li>mapping of RSSIs in space will be required </li></ul><ul><li>further work on location algorithms required </li></ul><ul><li>complex mappings required </li></ul><ul><li>probabilistic location algorithms </li></ul>
  11. 11. Next Steps <ul><li>multiple readers </li></ul><ul><li>map RSSI in space (contour maps) </li></ul><ul><li>Environmental factors </li></ul><ul><li>use position estimate to trigger content delivery e.g. audio </li></ul><ul><li>location algorithms based on probability </li></ul>

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