Doublemode blocking anticollision algorithm in RFID tags

ZHAO Yu, SHEN Haibin
(Institute of VLSI Design, Zhejiang University, Hangzhou 310027, China)

Abstract: In order to solve the problems of the collisions between staying tags, those between arriving tags and staying tags, and the large amount of idle time slots brought by traditional blocking algorithms when staying ratio is low, a new ‘doublemode’ blocking algorithm was proposed. Research and performance analysis about adaptive binary splitting(ABS) algorithm and traditional blocking algorithms were carried out. Considering the advantages of the algorithms above and the number of arriving tags, the problems mentioned above were solved in this algorithm. Performance analyses were done from the aspects of the number of total tags, the arriving ratio and the staying ratio. Theory analysis and experiments both prove the efficiency and reliability of this algorithm.
Key words: radio frequency identification(RFID); adaptive binary splitting(ABS); blocking; anticollision