An anti-collision algorithm based on tag serial number extended grouping

RFID tag recognition technology is widely used in logistics and retail industry. In order to solve the problem of long time delay of information transmission in the process of multi tag recognition, a new anti-collision algorithm based on extended group of tag serial number is proposed after analyzing the key technologies of multi tag recognition, especially the advantages and disadvantages of tag anti-collision technology. The algorithm adds recursive grouping tag recognition method based on the Manchester code. This method changes the information interaction logic between the reader and the tag in the existing algorithm, makes great use of the advantages of the Manchester code, and makes use of the characteristics of the error code in the Manchester code to reverse the bit of the collision tag conflict, which effectively simplifies the communication between the reader and the writer to identify multiple tags. Delay[1]. Compared with the existing algorithms, this algorithm has a higher efficiency in the field of multi tag recognition technology. It can quickly identify multiple tags in a short time, effectively improve the capacity of the system, and ensure the stability and reliability of the tag recognition system.