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Radio-Frequency IDentification (RFID) systems consist of Radio Frequency (RF) tags and networked electromagnetic readers. Check in and Checkout of goods becomes faster and more efficient when RFID systems are implemented. A common issue of all RFID systems is the collision of signals. Since multiple passive tags respond to a query broadcasted by a reader, the reader becomes a recipient of mixture of scattered waves which results in increase in identification delay, communication overhead and unnecessary energy wastage that ultimately shortens the life span of the system. Conventional protocols began their journey from being memoryless; however recent mechanisms are memory oriented. It is also observed that existing approaches perform better when the tag population is optimal.
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