Location determination method and system for asset tracking devices
First Claim
1. A method of determining a position of an asset tracking device within a geographical location, comprising:
- searching, by the asset tracking device, for available location determination schemes at the geographical location;
selecting one of the available location determination schemes; and
determining coordinates of the position of the asset tracking device using the selected location determination scheme.
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Accused Products
Abstract
A method of determining a geographical location of an asset tracking device, includes searching, by the asset tracking device, for available location determination schemes at the geographical location, selecting one of the available location determination schemes, and determining coordinates of the geographical location using the selected location determination scheme. Some embodiments also include making a decision based, at least in part, upon the geographical location coordinates determined by using the selected location determination scheme. Some embodiments include transmitting a location message, the location message including the coordinates of the geographical location and an indication as to the selected location determination scheme.
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Citations
20 Claims
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1. A method of determining a position of an asset tracking device within a geographical location, comprising:
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searching, by the asset tracking device, for available location determination schemes at the geographical location;
selecting one of the available location determination schemes; and
determining coordinates of the position of the asset tracking device using the selected location determination scheme. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system, comprising:
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at least one asset tracking device, the asset tracking device including a communications module, a processing and storage module coupled to the communications module, and a location module coupled to the processing and storage module;
a network access point, wirelessly coupled to the at least one asset tracking device; and
a local positioning system comprising a plurality of reference tags, each of the reference tags having its known position coordinates stored therein, the reference tags wirelessly coupled to receive signals transmitted from the at least one asset tracking device, and to transmit signals to the at least one asset tracking device;
wherein the at least one asset tracking device is operable to determine that its location module is unable to determine position coordinates from GPS signals, is further operable to search for one or more reference tags of the local positioning system, to communicate with the local positioning system so as gather the information necessary to compute it position coordinates; and
wherein the at least one asset tracking device is an RFID tag attached to an item to be tracked.
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Specification