Influence of Managing the Number of Tag Bits Transmitted on the Query Tree RFID Collision Resolution Protocol

Radio Frequency Identification (RFID) technology is increasingly becoming popular, for its widespread use and more sophisticated applications. The coexistence of tags sharing the communication channel requires solutions to message collisions, which degrade bandwidth, and increase the number of transmitted bits. A new methodology called ‘window’ is presented to manage the number of bits transmitted by a tag. The aim is show how the query tree (QT) protocol is influenced by this feature, and how the performance of the novel protocol, query window tree (QwT), improves when the tag ID distribution is correlated. Therefore, we have performed a fair comparison of the Query Tree and the new proposed QwT protocol for various tag ID distributions. Simulations show that the QwT positively decreases the total number of bits that are transmitted by tags.