Probabilistic Dynamic Framed Slotted ALOHA for RFID Tag Identification

In this paper, we study Radio Frequency IDentification (RFID) tag identification problems using Framed Slotted ALOHA (FSA) protocol. Each tag will be assumed to participate in the contention with a certain probability. Then, the frame size and the probability will be dynamically controlled by the reader in every reading round so that all the tags can be detected in a short period of time. Moreover, we propose a practical way of controlling the probability in terms of transmit power control, assuming Additive White Gaussian Noise (AWGN) channel or flat Rayleigh fading channel. Computer simulation results demonstrate the effectiveness of the proposed method.