Patent ID: 8798573
Filing Date: 2014-08-05
Classification: H04L,H04M,H04W

Abstract:
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.