RFID tag sensitivity
First Claim
1. A method of collecting performance information for individual radio frequency identification (RFID) tags, the method comprising:
- measuring the performance of a tag, comprising;
stimulating the tag with radio frequency (RF) signals at least once at each of a plurality of field strengths;
in response to stimulation at each of the plurality of field strengths, attempting to read the tag; and
determining a first field strength at which the tag is successfully read at an error rate that is less than a first predetermined error rate;
storing one or more values that represent the measured performance in an information repository separate from the tag; and
associating the stored values with an identifier that is uniquely associated with the tag.
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Accused Products
Abstract
Systems, methods, or computer program products may collect information about the performance of individual RFID tags. In particular, signal strength and/or signal sensitivity of individual RFID tags may be measured and the resulting performance information may be stored in a data repository. In the data repository, the performance information for an individual tag may be associated with an identifier that is uniquely associated with the tag. In one exemplary embodiment, the performance information may be used by an on-line system configured to automatically determine the performance margin with which RFID tags are being read in an RFID system, or to automatically tune the RFID system to achieve a desired performance margin.
109 Citations
18 Claims
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1. A method of collecting performance information for individual radio frequency identification (RFID) tags, the method comprising:
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measuring the performance of a tag, comprising; stimulating the tag with radio frequency (RF) signals at least once at each of a plurality of field strengths; in response to stimulation at each of the plurality of field strengths, attempting to read the tag; and determining a first field strength at which the tag is successfully read at an error rate that is less than a first predetermined error rate; storing one or more values that represent the measured performance in an information repository separate from the tag; and associating the stored values with an identifier that is uniquely associated with the tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of commissioning a radio frequency identification (RFID) tag for use in an RFID system that tracks the movement of article through a supply chain, the method comprising:
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measuring the performance of an individual RFID tag, the measuring comprising; stimulating the tag with a radio frequency (RF) signal at least once at each of a plurality of field strengths and attempting to read the tag at each of the plurality of field strengths; in response to stimulation at each of the plurality of field strengths, attempting to read the tag; and determining a first field strength at which the tag is successfully read at an error rate that is less than a first predetermined error rate; encoding the RFID tag with a unique identifier; associating the unique identifier with a first information representing the measured performance; storing the first information and the unique identifier in an information repository separate from the tag; and coupling the tag to an article to be tracked as the article moves through the supply chain. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification