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The paper proposes the method to improve the average identification time of passive tags for ISO/IEC 18000-3 Mode 2 RFID system by tuning the anti-collision protocol. The standard provides ALOHA-based and FTDMA(Frequency Time Division Multiple Access) anti-collision protocol. In this paper, this protocol is enhanced by two aspects. One is the increment of the channel efficiency by applying newly proposed multicast scheme. Another is the reduction of the number of frame exchange during the tag identification period by efficiently tuning the muting set adjustment in the standard.
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