为解决目前现有电子标签防碰撞算法在电子标签数量较大时，读取效率低且耗时较长的问题，提出了一种基于二元指数后退的时隙选择算法，当碰撞发生时，改进算法以二进制指数方式进行时隙的增加，并随机选择时隙发送数据，重复这个过程直到所有标签被正确读出。仿真试验表明，在电子标签数量急剧增加时，改进算法的读取效率较高，电子标签读取所需时隙基本不增加。

A time slot selection algorithm based on binary exponential backoff was put forward to solve the low reading efficiency and time consuming problems of existing electronic tag anti-collision algorithms under heavy reading load. When a collision occurs, the proposed algorithm increases the time slot to the binary exponential and randomly selects a time slot to send data, and repeat this process until all the RFID are read correctly. The simulation results showed that a sharp increase in the number of electronic tags, the higher the reading efficiency of the algorithm and with little increase of data access time.