Hardware based design and performance evaluation of a tree based RFID anti-collision protocol

Abstract

The growing concern in tracking, identification and localization systems has turn Radio Frequency Identification (RFID) technology into a mainstream in scientific research. In this technology, the phenomena known as the tag collision problem is becoming increasingly important, since it leads to a wastage of bandwidth, energy, and an increase in identification delay. There- fore, anti-collision protocols are required to mitigate collisions. Tree based protocols constitute one of the two main types of Radio Frequency IDentification (RFID) anti-collision protocols. Inside this group, Collision Tree (CT) protocol constitutes a representa- tive strategy, since some other strategies are based on it. The focus of this work is to design and evaluate with VHDL the CT tag's chip design in order to extract the number of clock cycles required by the reader to identify a set of tags. A stability analysis is also per- formed. Simulations results show that the total number of clock cycles is linearly influenced by the tag's ID length.