earticle

영어

The PS algorithm divides the tags within the reader’s identification range into smaller groups by increasing the transmission power incrementally and identifies them. This algorithm uses the fixed frame size at every scan. Therefore, it has problems that the performance can be variously shown according to the number of tags, frame size, and power level increase. In this paper, we propose an EPS algorithm that allocates the optimal frame size by estimating the number of tags at each scan. The simulation results showed that the identification delay of EPS algorithm could be improved 70% compared with PS algorithm. It also provided a stable identification delay regardless of power level increase.