Multichannel slotted-aloha anticollision protocol for active RFID systems

Authors:
Won-Ju Yoon;Sang-Hwa Chung;Shin-Jun Park;Su-Young Kang
Affiliations:
Department of Computer Engineering, Pusan National University, Republic of Korea;Department of Computer Engineering, Pusan National University, Republic of Korea;Department of Computer Engineering, Pusan National University, Republic of Korea;Department of Computer Engineering, Pusan National University, Republic of Korea
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

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Abstract

We propose a multichannel slotted-aloha anticollision protocol to mitigate the tag collision problem and improve tag collection performance in active RFID systems. In the proposed anticollision protocol, while an RFID reader transmits commands to multiple RFID tags via a common radio channel, it receives multiple tag responses over multiple radio channels simultaneously. We also implemented an active RFID system supporting the proposed anticollision protocol. In experiments with the implemented reader and 60 tags, the average time spent on tag collection using the dual-channel anticollision protocol was 46.5% of that required using the single-channel anticollision protocol.