1. A short survey for WSN localization & location systems

2. Localization category Range-based – RSSI, TOA, TDOA, AOA Range-free – DV-hop (DV-distance, Euclidean, DV-coordinate, DV-Bearing, DV-Radial), Convex, MDS-MAP

3. Convex

4. DV-hop

5. Experiments Crickets(MIT, TDOA) Accuracy: 1m

6. Experiments(cont.) Active Badge & Active Bat (AT&T) – Active Badge: Infrared – Active Bat: Ultrasound

7. Experiments(cont.) MoteTrack (Harvard, Convex) Accuracy: 1m~1.7m

8. Experiments (cont.) MIT: Smart Floor (video)

9. Experiments (cont.) Others: – RADAR, MotionStar magnetic tracker, Easy Living – Smart Floor, E911, SpotON, Wireless Andrew,

10. Comparison & Evaluation

11. Comparison & Evaluation(cont.)

12. Others: Mobile Phone Localization GSM cell Tech. (accuracy 200m) A-GPS (outdoor, accuracy 10m)