A Rapid Tag Identification Method with Two Slots in RFID Systems

RFID is core technology in the area of ubiquitous computing. Identify the objects begin with the reader´s query to the tag attached to the subject. When multiple tags exist in the reader´s interrogation zone, these tags simultaneously respond to the reader´s query, resulting in collision. In RFID system, the reader needs the anti-collision algorithm which can quickly identify all the tags in the interrogation zone. This paper proposes tree based Rapid Tag Identification Method with Two Slots(RTIMTS). The proposed algorithm rapidly identifies a tag with the information of Two Slots and MSB(Most Significant Bit). Two Slots resolve the tag collision by receiving the response from the tag to the Slot 0 and 1. The reader can identify two tags at once using MSB of information added to the tag ID. With RTIMTS algorithm, the total time of tag identification can be shortened by decreasing the number of query-responses from the reader.