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Reliable RFID bulk reading using adaptive time and power control

Bulk reading in RFID application for industrial laundry management presents a challenge in read reliability due to unknown time duration needed to read a population of tags. In this paper, we contributed an improved control algorithm to adaptively adjust the time duration to achieve better reliability. Our benchmark results show that the proposed adaptive time control provides sufficient time for RFID tags to be read than the conventional fixed time control. In addition, we also contributed a dynamic power control algorithm to increase the transmitting power in a step-wise manner until the maximum allowed limit is reached. Our benchmark results show that the dynamic power control approach is more energy efficient than the conventional static power approach in which the preset values are too high for smaller size bulk reading resulting in energy wastage. The former is also more effective in achieving 100% read accuracy than the latter in which the preset values are too low for bigger size bulk reading resulting in read accuracy loss.