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Monitoring activities of daily living using radio frequency emissions

  • US 8,798,573 B2
  • Filed: 08/22/2007
  • Issued: 08/05/2014
  • Est. Priority Date: 08/22/2007
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • passively scanning an RF spectrum of the RF ambient environment of a building;

    detecting an RF signal in the scanned RF spectrum emitted from a device in the building, the detected RF signal comprising an RF signature of the device as the device is operated or used by a user;

    determining an identity of the detected device by finding the RF signature of the detected RF signal in a local database of known device RF signatures in the RF ambient environment of the building and obtaining a device identification associated with the RF signature in the local database, wherein determining the identity of the detected device comprises determining a device type of the detected device based on the RF signature of the device;

    if the RF signature of the detected RF signal is found in the local database, storing, in a log of activities occurring in the building, usage information of the detected device as the detected device is operated or used by the user; and

    analyzing the log of activities occurring in the building to determine a status of the user in the building.

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