基于标签序列号扩展分组的防碰撞算法

Anti-Collision Algorithm Based on Extended Packet Label Serial Number

射频识別(RFID)标签识别技术普遍应用在物流和零售行业等工业领域。为了解决多标签识别过程中信息传输时延过长的问题,在系统分析了当前多标签识别技术中的关键技术(特别是标签防碰撞技术)的优劣后,提出了一种基于标签序列号扩展分组的防碰撞算法。该算法在曼彻斯特编码的基础上,增加了递归分组的标签识别方法。该方法改变了现有算法中读写器与标签之间的信息交互逻辑,利用曼彻斯特编码中误码的特征反推冲撞标签冲突的比特位,有效地简化了读写器识别多标签的通信时延。对比现有的算法,该算法在多标签识别技术领域具有较高的标签识别效率,能够在很短的时间内快速识别多个标签,有效地提高了系统的容量,保证了标签识别系统的稳定性和可靠性。

Radio frequency identification(RFID)tag identification technology is widely used in logistics and retail industry.In order to solve the problem of long delay of information transmission in the process of multi-tag identification.After systematically analyzing the advantages and disadvantages of the key technologies in the current multi-tag identification technology(especially the anti-collision technology of labels),an anti-collision algorithm based on the extended grouping of label serial Numbers is proposed.Based on Manchester coding,this algorithm adds a recursively grouped tag recognition method.This method changes the information interaction logic between reader and tag in the existing algorithms,and uses the error-code feature in Manchester coding to reverse the collision bit of tag,thus effectively simplifying the communication delay of reader recognition of multiple tags.Compared with the existing algorithms,this algorithm has a higher tag recognition efficiency in the field of multi-tag recognition technology,can quickly identify multiple tags in a very short time,effectively improve the capacity of the system,and ensure the stability and reliability of the tag recognition system.