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Multichannel Anticollision Protocol for Improving Tag Collection Performance in Active RFID Systems  

Yoon, Won-Ju (부산대학교 컴퓨터공학과 컴퓨터구조 및 시스템연구실)
Chung, Sang-Hwa (부산대학교 컴퓨터공학과 컴퓨터구조 및 시스템연구실)
Park, Shin-Jun (부산대학교 컴퓨터공학과 컴퓨터구조 및 시스템연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.1A, 2009 , pp. 50-57 More about this Journal
Abstract
Tag collection is one of the major functions in RFID systems. In this paper, 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 channel, it receives multiple tag responses over multiple channels simultaneously. We also implemented an active RFID system supporting the proposed anticollision protocol. In experiments with the implemented reader and 60 tags, the proposed dual-channel slotted-aloha anticollision protocol showed a large improvement in tag collection performance compared with the single-channel slotted-aloha anticollision protocol. With 60 tags, the average time spent on tag collection using the dual-channel anticollision protocol was 600.543 ms, which was 46.3% of the 1289.721 ms required using the single-channel anticollision protocol.
Keywords
Active RFID; Multichannel; Anticollision protocol; Tag collection; slotted aloha;
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