Method and system for correctly identifying specific RFID tags
First Claim
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1. A method for identifying a specific RFID tag, the method comprising:
- scanning RFID tags using an RFID reader;
determining a received signal strength indication (RSSI) value for each of the scanned RFID tags;
calculating a tag score for each of the RFID tags using the received RSSI value of each respective scanned RFID tag, wherein the calculated tag score is an average value of a first score corresponding to a normalized value of the received RSSI values and a second score corresponding to a normalized value of another signal parameter for each RFID tag, wherein the other signal parameter is an occurrence frequency value for each RFID;
determining a difference between a highest tag score of the calculated tag scores for the RFID tags and a next highest tag score of the calculated tag scores for the RFID tags;
comparing the difference with a first threshold; and
identifying the RFID tag having the highest tag score as the specific RFID tag in response to the difference being greater than the first threshold.
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Abstract
A system and method for identifying a specific RFID tag includes RFID reader circuitry, such as within an RFID reader, configured for sending and receiving RF signals to detect RFID tags and for obtaining signal parameter information associated with the RFID tags. Processing circuitry is configured for using the signal parameter information for one or more tags of the RFID tags and calculating a tag score for the one or more RFID tags. The processing circuitry is further configured for determining a specific RFID tag using the tag scores for the one or more RFID tags.
400 Citations
18 Claims
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1. A method for identifying a specific RFID tag, the method comprising:
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scanning RFID tags using an RFID reader; determining a received signal strength indication (RSSI) value for each of the scanned RFID tags; calculating a tag score for each of the RFID tags using the received RSSI value of each respective scanned RFID tag, wherein the calculated tag score is an average value of a first score corresponding to a normalized value of the received RSSI values and a second score corresponding to a normalized value of another signal parameter for each RFID tag, wherein the other signal parameter is an occurrence frequency value for each RFID; determining a difference between a highest tag score of the calculated tag scores for the RFID tags and a next highest tag score of the calculated tag scores for the RFID tags; comparing the difference with a first threshold; and identifying the RFID tag having the highest tag score as the specific RFID tag in response to the difference being greater than the first threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for identifying a specific RFID tag, the system comprising:
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an RFID reader that scans RFID tags to obtain signal parameter information of each of the RFID tags, the signal parameter information comprising a received signal strength indication (RSSI) value for each of the RFID tags; circuitry that; uses the RSSI values for the RFID tags and assigns a different weight to at least one signal parameter value of the signal parameter information for the RFID tags over another signal parameter value to calculate tag scores by multiplying the at least one signal parameter by a respective multiplier for the RFID tags, wherein the signal parameter information further comprises occurrence frequency values for each of the RFID tags, wherein the circuitry averages the RSSI and occurrence frequency values for each of the RFID tags to calculate a tag score for each of the RFID tags, and determines a difference between a highest tag score and a next highest tag score for the one or more RFID tags and compares the difference to a first threshold value to identify the specific RFID tag using the tag scores. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for identifying a specific RFID tag, the system comprising:
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RFID reader circuitry that sends and receives RF signals to detect RFID tags and that obtains signal parameter information associated with the RFID tags; and processing circuitry that uses the signal parameter information for one or more tags of the RFID tags and assigns a different weight to at least one signal parameter value of the signal parameter information for the one or more RFID tags over another signal parameter value to calculate tag scores by multiplying the at least one signal parameter by a respective multiplier for the one or more RFID tags, wherein the tag scores are used to identify the specific RFID tag, wherein the calculated tag score is an average value of a first score corresponding to a normalized value of received RSSI values and a second score corresponding to a normalized value of another signal parameter for each RFID tag, wherein the other signal parameter is an occurrence frequency value for each RFID, and wherein the processing circuitry determines a difference between a highest tag score and a next highest tag score for the one or more RFID tags and compares the difference to a first threshold value to identify the specific RFID tag using the tag scores. - View Dependent Claims (16, 17, 18)
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Specification