提出了一个在 RFID系统中改进的防冲突算法 ,该算法基于 Aloha算法并结合了二叉树算法。当有大量

标签同时需要识别时 ,首先通过对标签上一轮的碰撞情况来估计待识别的标签数 ,然后对标签进行分类或改变帧的

大小来降低标签发生碰撞的概率 ,从而提高识别的效率。-A in the RFID system to improve the anti-collision algorithm based on the Aloha algorithm and a combination of binary tree algorithm. When there is need to identify a large number of tags at the same time, the first round of the label collision situation to be identified to estimate the number of labels, and then on the labels to classify or change the size of the fr a me to reduce the probability of collisions labels, thereby enhancing the efficiency of recognition .