Method for identifying tags using adaptive binary tree splitting technique in RFID system and RFID system therefore
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United States of America Patent
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Jul 2, 2013
Grant Date -
Feb 12, 2009
app pub date -
Sep 8, 2006
filing date -
Sep 30, 2005
priority date (Note) -
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Abstract
The RFID system includes an RFID reader for sending information selected from among collision type information, idle type information, and readable type information, to all of the RFID tags depending on the number of signals in the corresponding time slot, and RFID tags for performing functions, in which, when information, indicating that a current time slot is a collision type, is fed back from the RFID reader, each of RFID tags selects one arbitrary value of either 0 or 1 and is assigned a time slot, in which a corresponding RFID tag will send a signal to the RFID reader, based on the selected value, a single tag group that caused a collision is divided into two sub-groups depending on the assigned time slots, and tags of the sub-groups send signals, including IDs thereof, to the RFID reader in different time slots for the respective sub-groups.
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