Research On The RFID Reader Controlled Anti-collision Algorithms Based On TDMA

The thesis introduced the structure of RFID system, Anti-collision Algorithms and relative standards. It focus on the reader controlled anti-collision RFID algorithms based on TDMA .The algorithms are mainly based on ALOHA or the binary. In the beginning, the algorithms which are based on ALOHA are discussed (BFSA, DFSA, AFSA, EDFSA) and detail performance comparison are made among the various algorithms. The binary algorithm and the dynamic binary algorithm are also introduced in the thesis. The features and disadvantages are analyzed. The binary algorithm is not random in the whole recognizing process, and can solve the collision problem occurred when there are multiple responders require communication in the responder acceptance range. The binary algorithm can improve the transmission speed, raise efficiency of channel, reduce the time slot, enhance the accuracy, and lift the system stability. Based on the study of the dynamic binary algorithm, the anti-collision RFID algorithm based on jumping and the similar binary is proposed through the method of transmitting 1 bit every time, which increases the efficiency of recognizing decreases the requirement of synchronization. The analysis of function and comparison of various algorithms are made based on binary on this basis. The performance advantage of the new algorithm is also analyzed in the thesis.