Performance Analysis of Tag Identification Time in Passive RFID Systems

Abstract

RFID systems are getting popular for management of things. In this paper, we consider BFSA (Basic Framed Slotted ALOHA) and DFSA (Dynamic Framed Slotted ALOHA) protocols for identification of passive RFID tags, and focus on the tag identification time necessary for a reader to collect IDs from all the tags. We propose a mathematical model and analyze it to evaluate the tag identification time. We also extend the model to include the case that slot length is cut off either when a slot is idle without any transmission or when a collision occurs. Numerical examples show that average tag identification time is drastically decreased by using DFSA protocol and adjusting slot length depending on its usage.