RFID TAG TRACKING SYSTEM AND RFID TAG TRACKING METHOD
First Claim
1. A radio frequency identification (RFID) tag tracking system, comprising:
- an RFID tag, periodically emitting a plurality of tag signals having different original signal strengths, and the original signal strength of each tag signal determining a signal receiving boundary relative to the RFID tag;
at least one radio frequency identification (RFID) reader, for receiving the tag signals emitted by the RFID tag, and determining the received tag signal as a receivable signal when the RFID reader is in each signal receiving boundary and a receiving strength corresponding to the received tag signal is greater than a threshold value; and
a backend-server, for determining a possible position area of the RFID tag relative to the RFID reader according to the signal receiving boundary corresponding to the receivable signal.
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Accused Products
Abstract
A radio frequency identification (RFID) tag tracking system is provided for performing an RFID tag tracking method. The RFID tag tracking system includes an RFID tag, at least one RFID reader, and a backend-server. The RFID tag periodically emits tag signals having different original signal strengths, and the original signal strength of each tag signal determines a signal receiving boundary relative to the RFID tag. The RFID reader is used to receive the tag signals, and the tag signal that can be received by the RFID reader receives the tag signals, and determines one or more receivable signals which cab be received by the RFID reader among the tag signals. The backend-server determines a possible position area of the RFID tag relative to the RFID reader according to the signal receiving boundary of the receivable signal.
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Citations
13 Claims
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1. A radio frequency identification (RFID) tag tracking system, comprising:
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an RFID tag, periodically emitting a plurality of tag signals having different original signal strengths, and the original signal strength of each tag signal determining a signal receiving boundary relative to the RFID tag; at least one radio frequency identification (RFID) reader, for receiving the tag signals emitted by the RFID tag, and determining the received tag signal as a receivable signal when the RFID reader is in each signal receiving boundary and a receiving strength corresponding to the received tag signal is greater than a threshold value; and a backend-server, for determining a possible position area of the RFID tag relative to the RFID reader according to the signal receiving boundary corresponding to the receivable signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio frequency identification (RFID) tag tracking method, for identifying an RFID tag and determining a position of the RFID reader, comprising the steps of:
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periodically emitting a plurality of tag signals having different original signal strengths by the RFID tag, wherein the original signal strength of each tag signal determining a signal receiving boundary relative to the RFID tag; receiving the tag signals by the RFID reader, wherein a receiving strength of a corresponding tag signal received by the RFID reader is greater than a threshold value when the RFID reader is in each signal receiving boundary; determining the tag signals having a receiving strength greater than the threshold value as receivable signals by the RFID reader; and determining a possible position area of the RFID tag according to the signal receiving boundaries corresponding to the receivable signals. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification