A novel RFID tag estimation algorithm based on DFSA

Tag collision is a very important problem in RFID system that plenty of collisions can result in failed transmission. The tag estimation algorithm is one of the most popular algorithms to resolve this problem. This paper proposes a novel tag estimation algorithm we called Dynamic Parameter Tag Estimation (DPTE) algorithm by which the estimation accuracy of frame length could be improved and the hardware costs could be decreased. This new algorithm introduces an accumulative parameter to trigger frame length changing only when the parameter reaches some predefined values. Compared with existed tag estimation algorithms, the new algorithm has even better performances on system efficiency, estimation accuracy and adjusting frequency of frame length.