Sensor Localization for LocationBased Authentication

1
Sensor Localization for Location-Based
Authentication

• Valliappan Annamalai
• And
• John Quintero

2
Project Goals

• Develop a localization mechanism for use in
  location-based authentication.
• Location-based access to computing resources.
• Focus on determining location indoors.

3
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.

4
Project Applications

• Badge
• Base Station
• Serial Forwarder
• Tracker Sender
• Tracker Server

5
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
6
Application Messaging
Tracker Server
Tracker Sender
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