RFID SYSTEM, CONTROL METHOD, AND RFID READER

摘要

PROBLEM TO BE SOLVED: To suppress reduction in transmission efficiency caused by collision between beacon signals of RFID tags.SOLUTION: An RFID tag comprises: a communication unit which uses a first frequency in connecting with an RFID reader, transmits a beacon signal for the connection to the RFID reader, and receives a response signal from the RFID reader; and a frequency control unit for changing a frequency used by the RFID tag to a second frequency which is included in the response signal and differs from the first frequency, when receiving the response signal. The RFID reader comprises: a first radio unit for performing connection processing with the RFID tag; a plurality of second radio units which perform communication with an RFID tag after connection completion; and a control unit for notifying the first radio unit of a second radio unit's frequency to be used by the RFID tag for communication with the RFID tag after the connection completion, on the basis of beacon signal information notified of from the plurality of second radio units during a predetermined period. The first radio unit transmits a response signal including information on the second radio unit's frequency to the RFID tag.