Anti-collision system and method for reducing the collision of data transmitted by RFID tags
AssigneeResearch & Business Foundation Sungkyunkwan University
InventorsTae Jin Lee, Jongho Park
Life of this patent
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Abstract
Provided are an anti-collision system and method which address the mobility of radio frequency identification (RFID) tags. An RFID reader may transmit an identification start command to identify a plurality of RFID tags in an identification area of the RFID reader. The RFID tags compare the number of collisions of each RFID tag receiving the identification start command with a collision threshold Cth and attempt to be identified in a binary tree section of a frame or in a framed slotted ALOHA (FSA) section of the frame based on the comparison.
Claims23
A method for reducing the collision of data transmitted by radio frequency identification (RFID) tags, the method comprising:
- transmitting, by an RFID reader, an identification start command which identifies one or more RFID tags in an identification area of the RFID reader;
- and
- comparing, at an RFID tag, a number of collisions of the respective RFID tag with a collision threshold (Cth), and adding an identification of the RFID tag in a binary tree section of a frame or in a framed slotted (ALOHA (FSA)) section of the frame based on the comparison.
An anti-collision apparatus using radio frequency identification (RFID), the anti-collision apparatus comprising:
- an RFID reader comprising
- an RF transceiver configured to perform transmission/reception with RFID tags using an RF method;
- and
- an identification module configured to transmit an identification start command to identify one or more RFID tags that are present in an identification area of the RFID reader;
- and
- an RFID tag configured to compare a number of collisions of the RFID tag with a collision threshold (Cth), and to add an identification of the RFID tag in a binary tree section of a frame or in a framed slotted (ALOHA (FSA)) section of the frame based on the comparison.
Dependencies are inferred from the claim text.