Tag recognition collision avoidance RFID system and tag identification method

摘要

This invention offers the tag recognition collision avoidance RFID system and tag identification method. As for tag identification method of this invention when pre- fixing kueri which is received from the RFID reader and the forefront of RFID tag itself ID agrees, being tag identification method of the RFID reader which identifies the plural RFID tags which transmit itself ID to the aforementioned RFID reader, the RFID reader to transmit kueri, when designating the process of the pair to which the RFID tag responds as round, the aforementioned RFID reader the queue/cue which houses pre- fixing which is transmitted with the following round (Q) field and candidacy queue/cue (CQ) to have the data field which includes with field, initializing queue/cue field, candidacy queue/cueIt transmits kueri which includes the 1st step which houses pre- fixing the field in queue/cue field and pre- fixing which is housed in the aforementioned queue/cue field to the RFID tag, the plural tags responding vis-a-vis the 2nd step which deletes pre- fixing which is transmitted from queue/cue field and pre- fixing which is transmitted in the past, when the identification of the tag is impossible, pre- fixing which inserts 0 and 1 where it is pre- fixing which corresponds to 1 bits in rear amount of pre- fixing kueri which is transmitted in the past it inserts in queue/cue field, one tag responds vis-a-vis pre- fixing which is transmitted in the pastWhen there is no response, unnecessary inserts pre- fixing kueri which is transmitted in the past in candidacy queue/cue field, is housed in candidacy queue/cue judging the 3rd step and the presence deletes pre- fixing of pre- fixing which is housed in queue/cue field, whether it does, when there is pre- fixing which is housed in queue/cue field, the 4th step which it feeds back in the aforementioned 2nd step and, including, there is a technical feature in becoming.