Asset tracking method
First Claim
Patent Images
1. An asset tracking system comprising:
- mobile tracking device comprising;
a GPS receiver, and a processor, and a digital data transmitter; and
a local fixed device comprising;
a GPS receiver, and a processor, and a digital data transceiver; and
reference devices comprising;
a GPS receiver, and a processor, and a digital data transceiver;
wherein said mobile tracking device receives uncorrected GPS-based position information and transmits said information to the local fixed device;
wherein said local fixed device accumulates and transmits said uncorrected GPS-based position information from said mobile tracking device;
wherein said reference device receives and applies differential corrections to said accumulated and transmitted uncorrected information; and
wherein said reference device prepares said corrected information for re-transmission.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a system for managing assets such as vehicles and/or equipment in an area such as a repair yard or parking lot. A plurality of mobile devices periodically wake-up at different times and transmit their uncorrected GPS location data to one or more fixed local devices. Each fixed local device periodically forwards its accumulated, uncorrected GPS data for each mobile device to a reference device. A reference device is precisely located and capable of differentially correcting the data and forwarding the corrected result sets either back to the local devices and/or to third parties.
-
Citations
2 Claims
-
1. An asset tracking system comprising:
-
mobile tracking device comprising;
a GPS receiver, and a processor, and a digital data transmitter; and
a local fixed device comprising;
a GPS receiver, and a processor, and a digital data transceiver; and
reference devices comprising;
a GPS receiver, and a processor, and a digital data transceiver;
wherein said mobile tracking device receives uncorrected GPS-based position information and transmits said information to the local fixed device;
wherein said local fixed device accumulates and transmits said uncorrected GPS-based position information from said mobile tracking device;
wherein said reference device receives and applies differential corrections to said accumulated and transmitted uncorrected information; and
wherein said reference device prepares said corrected information for re-transmission.
-
-
2. A method for tracking vehicles or assets, the method comprising:
-
providing a mobile tracking device comprising;
a non-differential GPS receiver, and a processor, and a digital data transmitter;
providing a local fixed device comprising;
a GPS receiver, and a processor, and a digital data transceiver;
providing a reference device comprising;
a GPS receiver, and a processor, and a digital data transceiver;
wherein said mobile tracking device receives uncorrected GPS-based position information and transmits said information to the local fixed device;
wherein said local fixed device accumulates and transmits said uncorrected GPS-based position information from said mobile tracking device;
wherein said reference device receives and applies differential corrections to said accumulated and transmitted uncorrected information; and
wherein said reference device prepares said corrected information for re-transmission.
-
Specification