Patent ID: 7580995

Claim:
A system, comprising: a server having memory; a user database stored in the memory of the server, the user database containing a user field for storing a user name of a mobile computer user, and a last known location field for storing a most recent location of a computer user identified in a corresponding user field; a wireless access point of a wireless local area network configured to receive RF network transmissions from one or more mobile computers; a mobile computer having memory and a wireless network interface for RF communication with the wireless access point of the wireless local area network; a location tracking system in the mobile computer memory configured to determine, based on a beacon packet's signal strength received from the wireless access point and using a previously established radio map of locations inside a plurality of buildings and locations outside of the buildings, a location of the mobile computer; a location manager in the mobile computer memory configured to periodically transmit the location of the mobile computer and the user name of a mobile computer user to the server via the wireless network interface, wherein the location manager transmits the location of the mobile computer in absolute coordinates; and a computing unit having a computing unit location manager configured to search the user database of the server to determine information regarding the location of a mobile user.