An Efficient Dynamic Anti-Collision Protocol for Mobile RFID Tags Identification

Traditional anti-collision protocols for RFID tags identification assume that the tags and reader are stationary, i.e., no tag is coming in or leaving during tags identification. If not, the reader cannot ensure that the tags are all identified. However, in the mobile RFID system, the reader or tags or all of them are moving continuously, and the tags dynamically enter and leave the reading area. Therefore, traditional protocols are not suitable for the mobile RFID system. This letter presents a dynamic anti-collision protocol, called dynamic collision tree protocol, to be used in the mobile RFID identification system to identify RFID tags that dynamically move into and leave the reading area.