Patent ID: 8378815

Claim:
A method of tracking assets from central stations using tracking devices enabled to receive site identities broadcast from transmitters at fixed locations within a wireless network, and enabled to wirelessly communicate position reports to the central stations, the method comprising the steps of: attaching a tracking device to an asset, and placing said asset into service within the wireless network; tracking the location of said asset by periodically communicating position reports containing current site identities from said tracking device to a central station; upon receipt at said central station of a first position report containing a first site identity, comparing said first site identity with a default list of site identities corresponding to said tracking device; disregarding said first position report and continuing said tracking step if said first site identity is found within said default list; storing said first site identity if said first site identity is not found within said default list; upon receipt at said central station of a subsequent position report containing a second site identity, comparing said second site identity with said default list; adding said first site identity to said default list and continuing said tracking step if said second site identity is found on said default list, and producing an alert signal if said second site identity is not found on said default list.