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This project focuses on developing a robust localization mechanism designed for location-based authentication, particularly for indoor environments. The main goal is to enable secure access to computing resources based on precise indoor location tracking. The challenges encompass overcoming issues such as indoor signal propagation, multipath effects, and variations due to pedestrian traffic and antenna orientation. The architecture involves the use of multiple base stations to measure signal strength from badges, allowing for efficient location determination and secure communication through a tiered messaging system.
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Sensor Localization for Location-Based Authentication Valliappan Annamalai And John Quintero
Project Goals • Develop a localization mechanism for use in location-based authentication. • Location-based access to computing resources. • Focus on determining location indoors.
Challenges • Indoor signal propagation subject to suffers from multipath propagation, shadowing and scattering. • Use scene analysis by constructing a signal-strength map of the lab. • Antenna orientation and pedestrian traffic cause local variation in signal strength.
Project Applications • Badge • Base Station • Serial Forwarder • Tracker Sender • Tracker Server
Example Architecture • Six base stations are used to capture signal strength information from a badge, which is compared to a pre-compiled mapping. • B: badge broadcasts id to establish its location. • BS: wireless base station captures badge signal strength, forwards to base station. BS BS BS B BS BS BS
Application Messaging Tracker Sender Tracker Server Badge Base Station W/L Message With Bdg ID Bdg Msg With BS ID and Signal Strength Forwards the Messages it Receives 1 Sec UDP data packets with BS message W/L Message With Bdg ID Serial Forwarder Second PC One PC