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Sensor-driven indoor localization with android #bcs2
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Sensor-driven indoor localization with android #bcs2

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Barcamp Stuttgart 2 presentation about indoor localization methologies with sensor equipped mobile devices.

Barcamp Stuttgart 2 presentation about indoor localization methologies with sensor equipped mobile devices.

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Transcript

  • 1. @onlythoughtwork @drewenut
  • 2. The city is indoors…but location matters! #bcs2: Sensor-driven indoor positioning
  • 3. Motivation
    • Location is the important information in Context Aware Computing.
      • Augmented reality
      • 4. Internet of things
    • Today, location for outdoor environments is provided by the Global Positioning System (GPS).
    • 5. However there is no appropriate solution for confined spaces yet.
    • 6. But 20 million sensor powered handsets were sold in 2008.
    • 7. And heavy passive RF-infrastructure in urban areas
    #bcs2: Sensor-driven indoor positioning
  • 8. Todays device sensors
    • RF Frequency
    • Inertial Sensing
    • Optical
      • Camera (QR Codes)
    Quelle: market.android.com #bcs2: Sensor-driven indoor positioning
  • 15. Positioning System Quelle: IEEE Communications Magazine Feb 2002, Indoor Geolocation Science and Technology #bcs2: Sensor-driven indoor positioning
  • 16. Marker Based Positioning
      • High accuracy
    • Drawbacks
      • Static
    #bcs2: Sensor-driven indoor positioning
  • 20. Fingerprint Positioning
    • Collect all environmental RF information one can get:
    • Create a radio map for a set of marker points
    • 24. Estimate user position by matching a RF sample with the radio map
    #bcs2: Sensor-driven indoor positioning
  • 25. Fingerprint Positioning (2)
    • Benefits
      • Robust
      • 26. Passive (no infrastructure) ‏
      • 27. Long term fading
      • 28. Positioning on site
    • Drawbacks
      • Lower accuracy
      • 29. Training phase
    Quelle: IEEE Communications Magazine Feb 2002, Indoor Geolocation Science and Technology #bcs2: Sensor-driven indoor positioning
  • 30. Triangulation via TOA
    • Benefits
      • High accuracy
      • 31. No training required
    • Drawbacks
      • Multipath fading
      • 32. Environmental infrastructure
      • 33. CPU-intensive
      • 34. Specialized hardware
      • 35. Positioning on server
    #bcs2: Sensor-driven indoor positioning
  • 36. Multi-Path-Propagation #bcs2: Sensor-driven indoor positioning
  • 37. Inertial Positioning
    • Uses inertial sensors
      • Accelerometer
      • 38. Gyroscope
      • 39. Compass (Magnetic field)
    • Dead reckoning (DR)
      • Process of estimating one's current position based upon a previously determined position
      • 40. Estimate position by speeds over elapsed time
    #bcs2: Sensor-driven indoor positioning
  • 41. Inertial Navigation Set (IRBM S3) Quelle: wikipedia #bcs2: Sensor-driven indoor positioning
  • 42. 6-axis Electronic Compass (G1) Quelle: http://www.phonewreck.com/wiki/index.php?title=Image:T-mobile_g1_main_pcb_2.jpg #bcs2: Sensor-driven indoor positioning Asahi Kasei Microsystems (AKM) AK8976A
  • 43. Positioning via WLAN
    • TOA based triangulation
    • 44. Received signal strength (RSS) measuring
    • 45. RSS values decrease with distance
    • 46. Create a radio map with recording fingerprints for a set of locations
    #bcs2: Sensor-driven indoor positioning
  • 47. Positioning via GSM #bcs2: Sensor-driven indoor positioning
  • 51. Positioning via Bluetooth
    • RSS measurering
    • 52. Enviroment landmarks
    #bcs2: Sensor-driven indoor positioning
  • 53. Positioning via Bluetooth (2) #bcs2: Sensor-driven indoor positioning
  • 54. Smart Space Framework
    • Sensor Fusion
    • Auto adaptive
    • 60. Continous Learning
    • 61. Open Source
    #bcs2: Sensor-driven indoor positioning
  • 62. Finite State Machine #bcs2: Sensor-driven indoor positioning
  • 63. Use Cases
    • Shopping center
      • Product search
      • 64. CBR (Consumer Based Routing)
      • 65. IBR (Interest Based Routing)
    • Museums
      • Family quiz, navitainment
    • Fairs
      • i.e. CEBIT
    • Car park, airport, subway, concert hall, sewerages
    • 66. Emergency evacuation and guidance service
      • Fire, earthquake, terror attacks
    • Context Aware Applications
    #bcs2: Sensor-driven indoor positioning