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Future Internet 2018, 10(10), 96; https://doi.org/10.3390/fi10100096

A Modified BA Anti-Collision Protocol for Coping with Capture Effect and Interference in RFID Systems

Electrical Engineering Department, College of Engineering, University of Basrah, Basra, Iraq
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Received: 19 August 2018 / Revised: 22 September 2018 / Accepted: 24 September 2018 / Published: 1 October 2018
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Abstract

Radio frequency identification (RFID) technology has widely been used in the last few years. Its applications focus on auto identification, tracking, and data capturing issues. However, RFID suffers from the main problem of tags collision when multiple tags simultaneously respond to the reader request. Many protocols were proposed to solve the collision problems with good identification efficiency and an acceptable time delay, such as the blocking anti-collision protocol (BA). Nevertheless, most of these protocols assumed that the RFID reader could decode the tag’s signal only when there was one tag responding to the reader request once each time. Hence, they ignored the phenomenon of the capture effect, which results in identifying the tag with the stronger signal as the multiple tags simultaneously respond. As a result, many tags will not be identified under the capture effect. Therefore, the purpose of this paper is to take the capture effect phenomenon into consideration in order to modify the blocking BA protocol to ensure a full read rate, i.e., identifying all the tags in the frame without losing any tag. Moreover, the modifications include distinguishing between collision and interference responses (for the period of staying tags) in the noisy environments, for the purpose of enhancing the efficiency of the identification. Finally, the simulation and analytical results show that our modifications and MBA protocol outperform the previous protocols in the same field, such as generalized query tree protocols (GQT1 and GQT2), general binary tree (GBT), and tweaked binary tree (TBT). View Full-Text
Keywords: blocking anti-collision protocols; capture effect; interference signals; RFID; tags collision blocking anti-collision protocols; capture effect; interference signals; RFID; tags collision
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Hussein, I.A.; Jasim, B.H.; Ali, R.S. A Modified BA Anti-Collision Protocol for Coping with Capture Effect and Interference in RFID Systems. Future Internet 2018, 10, 96.

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