Timeout durations for radio frequency identification tags
First Claim
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1. A method for tracking inventory, comprising:
- determining a first receipt by an antenna element of a first radio frequency identification (“
RFID”
) tag identifier;
determining a second receipt by the antenna element of the first RFID tag identifier;
determining that the first RFID tag identifier is not included in an inventory table;
determining a first timeout duration for the first RFID tag identifier based at least in part on a first time duration between the first receipt by the antenna element of the first RFID tag identifier and the second receipt by the antenna element of the first RFID tag identifier;
storing the first RFID tag identifier and the first timeout duration in the inventory table;
determining a third receipt by the antenna element of a second RFID tag identifier;
determining a fourth receipt by the antenna element of the second RFID tag identifier;
determining that the second RFID tag identifier is not included in the inventory table;
determining a second timeout duration for the second RFID tag identifier based at least in part on a second time duration between the third receipt by the antenna element of the second RFID tag identifier and the fourth receipt by the antenna element of the second RFID tag identifier, wherein the first timeout duration for the first RFID tag identifier and the second timeout duration for the second RFID tag identifier are different; and
storing the second RFID tag identifier and the second timeout duration in the inventory table.
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Accused Products
Abstract
This disclosure describes the establishment, use and adjustment of timeout durations for individual RFID tags. Each RFID tag within an inventory system has a timeout duration that is based at least in part on a time duration between receipts of a RFID tag identifier associated with the RFID tag.
83 Citations
20 Claims
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1. A method for tracking inventory, comprising:
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determining a first receipt by an antenna element of a first radio frequency identification (“
RFID”
) tag identifier;determining a second receipt by the antenna element of the first RFID tag identifier; determining that the first RFID tag identifier is not included in an inventory table; determining a first timeout duration for the first RFID tag identifier based at least in part on a first time duration between the first receipt by the antenna element of the first RFID tag identifier and the second receipt by the antenna element of the first RFID tag identifier; storing the first RFID tag identifier and the first timeout duration in the inventory table; determining a third receipt by the antenna element of a second RFID tag identifier; determining a fourth receipt by the antenna element of the second RFID tag identifier; determining that the second RFID tag identifier is not included in the inventory table; determining a second timeout duration for the second RFID tag identifier based at least in part on a second time duration between the third receipt by the antenna element of the second RFID tag identifier and the fourth receipt by the antenna element of the second RFID tag identifier, wherein the first timeout duration for the first RFID tag identifier and the second timeout duration for the second RFID tag identifier are different; and storing the second RFID tag identifier and the second timeout duration in the inventory table. - View Dependent Claims (2, 3, 4)
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5. A computing system, comprising:
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a processor; and a memory coupled to the processor and storing program instructions that when executed by the processor cause the processor to at least; receive from a radio frequency identification (“
RFID”
) reader a first instance of a first RFID tag identifier;receive from the RFID reader a second instance of the first RFID tag identifier; determine a first timeout duration for the first RFID tag identifier based at least in part on a first time duration between the receipt of the first instance of the first RFID tag identifier and the receipt of the second instance of the first RFID tag identifier, wherein the first timeout duration for the first RFID tag identifier is different than a second timeout duration for a second RFID tag identifier included in a table; and include the first RFID tag identifier and the first timeout duration in the table. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for monitoring radio frequency identification (“
- RFID”
) tags, comprising;maintaining an inventory table of a plurality of RFID tag identifiers representative of a plurality of RFID tags within a detectable range of a RFID reader; for each of the plurality of RFID tags; determining a timeout duration; and periodically adjusting the timeout duration based at least in part on a time duration between a first instance of receipt by the RFID reader of the representative RFID tag identifier and a second instance of receipt by the RFID reader of the representative RFID tag identifier; and wherein a first timeout duration for a first RFID tag of the plurality of RFID tags and a second timeout duration for a second RFID tag of the plurality of RFID tags are different. - View Dependent Claims (16, 17, 18, 19, 20)
- RFID”
Specification