Highly Accurate Occupancy Estimation Using RF Signals and Wi-Fi

Tech ID: 25050 / UC Case 2015-636-0

Brief Description

A framework that counts the number of people in an area based on RF signals and a Wi-Fi card or network. 


In recent years, there has been an increased interest in understanding what Wi-Fi signals can tell us about our environment. Successful occupancy detection by Wi-Fi has many potential applications, such as search and rescue, robotic exploration, location awareness services, and smart health systems. Currently, occupancy detection using direct vision-based techniques is limited by high computational and deployment costs, and the use of radio frequency (RF) signals largely requires users to carry devices.


Researchers at UC Santa Barbara have created a framework that counts the number of people in an area based on RF signals and a Wi-Fi card or network. It bases its calculations on Wi-Fi power measurements between a transmitter and a receiver. Occupants alter these measurements by impacting the Line of Sight (LOS) and scattering effects. This invention captures these effects and then employs mathematical and statistical computations to determine the accurate number of people within a given space.

More information on Dr. Mostofi's website: http://www.ece.ucsb.edu/~ymostofi/HeadCountingWithWiFi.html


  • Improves accuracy of occupancy estimations
  • Low computational & deployment costs


  • Smart building management
  • Emergency response operations
  • Any Wi-Fi-enabled electronic device

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 10,033,472 07/24/2018 2015-636
United States Of America Issued Patent 9,866,337 01/09/2018 2015-636


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Other Information


indtelecom, wi-fi, rf signals, occupancy, indsoftw

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