# team15-FinalPresentation2

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Published on January 6, 2009

Author: aSGuest9442

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Indoor Location Inference( RADAR review ) : Indoor Location Inference( RADAR review ) Team 1 Team 5 Motivation : Motivation Since wireless environment is getting popular, in the building where location inference cannot be possible by GPS, we want to find a location of mobile device which uses wireless LAN by using the method of RADAR. Overview : Overview Experimentation 1In the gym Relation between distance and signal strength Experimentation 2In the Creative Learning Building We reviewed RADAR method Conclusion Experimentation 1 : In the gym (1/3) : Experimentation 1 : In the gym (1/3) Per ten pieces of tissues, we checked a signal strength Experimentation 1 : In the gym (2/3) : Experimentation 1 : In the gym (2/3) Experimentation 1 : In the gym (3/3) : Experimentation 1 : In the gym (3/3) Analysis of the Result From this result, it was not reasonable to conclude that signal strength is strongly related with the distance. We decided to change our plan into review of the RADAR’s method. Experimentation 2 : In Creative Learning Building (1/5) : In Creative Learning Building with 3 APs Experimentation 2 : In Creative Learning Building (1/5) Experimentation 2 : In Creative Learning Building (2/5) : Experimentation 2 : In Creative Learning Building (2/5) 4th floor, Creative Learning Building 1 AP2 : Ch.4 Airstation AP3 : Ch.8 3Com AP1 : Ch.1 Airstation Experimentation 2 : In Creative Learning Building (3/5) : Measurement of signal strength of each AP at several locations. Experimentation 2 : In Creative Learning Building (3/5) Experimentation 2 : In Creative Learning Building (4/5) : Location Inference Test 1 (3, 4, 17-A)(3, 4, 17-A)(17-A, 3, 1) (5, 4, 8)(6, 5, 4)(5, 6, 4) (5, 6, 4)(5, 6, 4)(5, 6, 4) (9-A, 17-B,15 )(15, 10-B, 17-A)(17-A, 3, 2) (15, 10-B, 10-A)(15, 10-B, 10-A)(15, 10-B, 16) (13, 12, 11-A)(14, 11-B, 10-A)(15, 11-B, 16) (13, 11-A, 12)(13, 11-A, 12)(13, 11-A, 12) (9-A, 17-B, )(9-A, 17-B, )(9-A, 17-B, ) (1, 15, )(15, 10-B, )(10-B, 15, ) (3, 4, 17-A)(3, 4, 17-A)(3, 17-A, 4) Experimentation 2 : In Creative Learning Building (4/5) Experimentation 2 : In Creative Learning Building (5/5) : Analysis of Test Result In our experimentation, location inference based on signal strength is not good enough. Possible Causes of Error Location of APs Number of APs Direction of the LAN card Experimentation 2 : In Creative Learning Building (5/5) Conclusion : Conclusion It is possible to infer the indoor location of mobile device by using the method of RADAR. To get more correct result, much data collection should be done before inference. By using continuous user tracking and profiling the environment, we may reduce the failure rate. We can find these methods from the paper, “Enhancements of RADAR.”

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