Indoor Location Using Wireless Sensor Networks Tim Porter

Indoor Location Using Wireless Sensor Networks Tim Porter Jeremy Witmer CS 522 Fall 2006 Semester Project 12/6/06 witmer-porter/wsn-location 1

Why realtime indoor location? • First responders • Building security 12/6/06 witmer-porter/wsn-location 2

Wireless SENSOR Networks • Self-forming mesh network • Micropower processor and radio • Highly configurable sensor capability 12/6/06 witmer-porter/wsn-location 3

Tiny. OS • nes. C • Structured, component-based language • Hardware access wrapped into components 12/6/06 witmer-porter/wsn-location 4

Hardware Diagram 12/6/06 witmer-porter/wsn-location 5

Motes 12/6/06 witmer-porter/wsn-location 6

Mote Software • Fixed/Mobile mote • Base mote 12/6/06 witmer-porter/wsn-location 7

Location Algorithm • Trilateration • Measurement ratio = signal strength/distance 12/6/06 witmer-porter/wsn-location 8

Location Software 12/6/06 witmer-porter/wsn-location 9

Location Software 12/6/06 witmer-porter/wsn-location 10

Results • Describe the testing environment • Locations found with error of approx. 5 inches in a network approx. 120 inches square • Concurrency issues • Algorithmic issues • High power drain 12/6/06 witmer-porter/wsn-location 11

Further Research • • • Attenuated signal testing Updated mote code Updated location software Querying/remote control of motes Extension to 3 dimensions 12/6/06 witmer-porter/wsn-location 12

Conclusions List your key contributions/points 12/6/06 witmer-porter/wsn-location 13

Questions? 12/6/06 witmer-porter/wsn-location 14