Methods of identifying RFID tag for preventing RFID tag collision, RFID reader and RFID tag using the same

摘要

A method of identifying a plurality of RFID tags in an RFID reader includes generating a Query command to transmit the Query command to an RFID tag in a ready state, receiving an error detection code from the RFID tag that received the Query command, generating an acknowledgement (ACK) command to transmit the acknowledgement (ACK) command to the RFID tag that transmitted the error detection code when the error detection code is received without a collision, and receiving tag information including a protocol control (PC) and an electronic product code (EPC) of the RFID tag that transmitted the error detection code. It is possible to improve tag identification speed using an error detection code, such as a cyclic redundancy check (CRC)-16 code, which has uniformly-random characteristics like random number with 16 bits (RN 16), instead of RN 16 used in a conventional EPCglobal Class1 Generation2 standard.