LOCATION BASED SYSTEMS
Gary Cullen
OVERVIEW
• Introduction to Location Based Systems
• Global Positioning System (GPS)
• Indoor Location Based Systems
• Extending the Range of Indoor Location Based Systems
INTRODUCTION TO LOCATION BASED SYSTEMS
•
Are we there yet?
•
Untethered Devices
• Developing for a mobile world
•
Location Based
• Social Media
• Gaming
• Marketing
www.loopt.com
www.geocaching.com
www.foursquare.com
• Augmented Reality – Google Glasses
GLOBAL POSITIONING SYSTEM (GPS)
• Constellation of 29 Satellites
• 1973 – NASA – Global Coverage
• Accuracy
• Standard GPS can provide accuracy of better than 7.8m 95% of the time
(Venkatraman et al. 2010)
• WAAS can provide accuracy of better than 3 meters 95% of the time
(FAA 2010)
• Nationwide Differential GPS System (NDGPS) currently under development,
argues that it can provide 10-15 centimetre accuracy
(NAVCEN 2012)
• Unusable in Indoor environments
TOMMY BOWE’S BODYCHECK
INDOOR LOCATION BASED SYSTEMS
• Wi-Fi (IEEE 802.11) (Ekahau, 2012)
• Using existing infrastructure
• Wi-Fi enabled Smart Phones, Laptops and Tablets
• Problems with Wi-Fi Localisation
• Noisy environment
• An Infrastructure designed for network coverage not for locating
• Signal Reflection\Refraction
EXTENDING THE RANGE OF INDOOR LOCATION
BASED SYSTEMS
• Research Hypothesis
The genesis for this research is the inability of an indoor location based system to
locate devices beyond the range of the fixed devices that are used to calculate the
position of the mobile devices on the network. The hypothesis advocates a solution
that extends the range of Indoor Location Based Systems using Mobile Devices at
the extremities of Cells that have a priori knowledge of their location, and utilizing
these devices to ascertain the location of devices beyond the range of the fixed
tracking device, but within range of the localised Mobile Devices. This results in a
cooperative localisation technique where participating devices come together to aid
in the determination of location of devices which otherwise would be out of scope.
EXTENDING THE RANGE OF INDOOR LOCATION
BASED SYSTEMS
EXTENDING THE RANGE OF INDOOR LOCATION
BASED SYSTEMS
THANK YOU FOR LISTENING
Gary Cullen
BIBLIOGRAPHY
•
Ekahau , Ekahau Real Time Location System (RTLS) Overview [Homepage of
Ekahau], [Online]. Available: http://www.ekahau.com/products/real-timelocationsystem/overview.html [2012, 29/12].