APPARATUS FOR RECOGNIZING RADIO FREQUENCY IDENTIFICATION (RFID) AND METHOD THEREOF, AND DATA PROCESSING METHOD OF RFID
First Claim
1. A method for reading a radio frequency identification (RFID) by an RFID reader reading a plurality of RFIDs, the method comprising:
- a) generating a specific query message to the RFIDs;
b) receiving a first response message corresponding to the query message from at least one RFID among the RFIDs; and
c) sequentially identifying a tag ID of the collided RFID by using a collision solving message when collision is generated according to the result of receiving the first response.
1 Assignment
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Accused Products
Abstract
The present invention relates to an RFID reader and a method thereof, and an RFID data processing method. The RFID reader generates a specific query message to a plurality of RFIDs, receives a first response message corresponding to the query message from at least one RFID among the RFIDs, and sequentially identifies a tag ID of a collided RFID by using a collision solving message when a collision occurs according to the result of receiving a first response message. The RFID reader can quickly and accurately identify a plurality of RFIDs since it can eliminate an unnecessary time such as excessive no response slot generation or repeated rounds through a sequential identification process for the collided RFIDs.
25 Citations
30 Claims
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1. A method for reading a radio frequency identification (RFID) by an RFID reader reading a plurality of RFIDs, the method comprising:
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a) generating a specific query message to the RFIDs; b) receiving a first response message corresponding to the query message from at least one RFID among the RFIDs; and c) sequentially identifying a tag ID of the collided RFID by using a collision solving message when collision is generated according to the result of receiving the first response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for processing data by a radio frequency identification (RFID) transmitting/receiving data with an RFID reader reading a tag ID, the method comprising:
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a) receiving a query message including round size information from the RFID reader; b) selecting a slot number based on the round size information of the query message; c) generating a first response message including a stored tag ID when the slot number satisfies a specific value; and d) transmitting the first response message to the RFID reader. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A radio frequency identification (RFID) reader for reading a plurality of RFIDs, comprising:
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a communicator for transmitting/receiving data to/from the RFID through RF signals; a storage unit for storing predetermined round size information, and storing tag IDs included by the RFIDs and product information matched with the tag IDs; and a controller for controlling the communicator and the storage unit, providing the round size information to the RFIDs, and sequentially identifying the tag IDs of the RFIDs by using a collision solving message when a collision is generated for a specific message received from the RFIDs. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method for reading a radio frequency identification (RFID) by an RFID reader reading a plurality of RFIDs, the method comprising:
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a) requesting a tag ID from the RFID; b) receiving a first response message from the RFID; c) generating a collision solving message including the stored discrimination code of 0 to the RFID when a collision is generated according to the received result; d) receiving a second response message corresponding to the collision solving message from the RFID; e) checking whether the MSB of the discrimination code is 1 when a collision is generated according to the result of receiving the second response message; f) adding a bit of 0 to the MSB of the discrimination code and changing it into a first discrimination code when the MSB is not 1 according to the result of checking the MSB; and g) generating a collision solving message including the first discrimination code to the RFID and repeating the steps after d). - View Dependent Claims (26, 27, 28, 29, 30)
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Specification