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Radio Frequency IDentification (RFID) systems have been widely deployed for inventory management, personal identification, and asset tracking. In such environments, RFID tags frequently move in and out of a reader's interrogation zone. Consequently, it is necessary for a reader to keep track of all tags in its interrogation zone in a periodic manner. This requirement not only increases workload of a reader but also generates large amount of traffic from a reader to a management server. In this paper, the authors propose a selective tag identification protocol which has two sub-frames: an identification frame and an access frame.
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