基于汉明重分组的动态帧时隙ALOHA 防碰撞算法

摘要

针对射频识别(RFID)系统中标签较多时动态帧时隙 ALOHA 算法识别效率快速下降的问题,在动态帧时隙 ALOHA 算法的基础上,利用标签 ID 前 M位的汉明重量对阅读器范围内标签进行分组,提出了一种基于汉明重分组的动态帧时隙 ALOHA 算法(LGDFSA),并利用 MATLAB 对它进行了仿真模拟。仿真结果表明,LGDF-SA 算法与动态帧时隙 ALOHA 算法相比,当标签数较多时,系统吞吐量提高,并趋于稳定,总操作数有所减少,系统总体效率提高。%On count of the rapid decline of efficiency when more tags were in radio frequency identification system, it used the Hamming weight of tags ID top Mbits to group the tags which were in the scope of the reader, this paper proposed a dynamic framed slotted ALOHA algorithm based on Hamming weight grouping (LGDFSA).And it simulated the algorithm by MAT-LAB.It compared with dynamic framed slotted ALOHA algorithm, the results show the system throughput is improved and tends to be stable, it cuts down the total number of operating in the system, the overall efficiency of RFID system has been ad-vanced.