Performance and Relibility of Radio Frequency Identification (RFID)
Innovation Fund, Project Number: INOVASI-2011-033
Under Supervision of: Associate Prof. Dr. Mandeep JS
Professor Dr. Tariqul Islam
Radio lab, Level 2, Engineering Faculty, The National University of Malaysia (UKM)
May 2012 - May 2015
Developing RFID Tag Estimation
The main objective of Radio Frequency Identification (RFID) systems is to provide fast identification for tagged objects. However, there is always a chance of collision, when tags transmit their data to the reader simultaneously. Collision is a time-consuming event that reduces the performance of RFID systems. Consequently, several anti-collision algorithms have been proposed in the literature. Dynamic Framed Slotted ALOHA (DFSA) is one of the most popular of these algorithms. DFSA dynamically modifies the frame size based on the number of tags. Since the real number of tags is unknown, it needs to be estimated. Therefore, an accurate tag estimation method has an important role in increasing the efficiency and overall performance of the tag identification process. In this research project, we propose a novel estimation technique for DFSA anti-collision algorithms that applies birthday paradox theory to estimate the number of tags accurately. The analytical discussion and simulation results prove that the proposed method increases the accuracy of tag estimation and, consequently, outperforms previous schemes.