Four slot dynamic binary search anti-collision Algorithm

To improve the performance of the Radio Frequency Identification (RFID) system and the multi-tag collision problem, a new anti-collision building algorithm is proposed based on the dynamic frame time slot Aloha algorithm and the analysis of binary search and four-slot binary search. In the new algorithm, the reader stack is used to form a further search command; the response tag is divided into four subsets, and the data information is sent in four-time slots, and up to eight tags can be recognized in one search. Simulation results show that the new algorithm greatly reduces the search times and recognition time.