The RFID System Multiple Tag Collision Algorithm Design And Research

The Internet of things is identified as one of the national strategic emerging industries, as the key technology of RFID technology is becoming a hot spot of current research.RFID is a non-contact automatic identification system, generally by the read-write device, electronic tag and system of top 3 parts.Electronic tags related items to store information, and reading and writing through radio frequency signal to complete communication between, the final data can be passed to a computer system to accomplish the data scale and automation of management and control.RFID system due to its reading efficiency, the advantages of the wireless identification is widely used in logistics, positioning identification, security and other fields.In practical application, the stand or fall of collision algorithm performance is often largely determines the discretion of the RFID system performance, large category high moving speed of electronic tag and to read and write data collisions tend to happen when communication, not only reduce the efficiency of recognition,sometimes even causing loss of data, it is a collision algorithm urgently needs to solve the problem.This paper first introduces the RFID technology and the basic composition and working principle of the RFID system, to electronic tag and to read and write communication may occur in the process of data, the problem of collision of several common method and algorithm has carried on the comparative study.ALOHA algorithm easy to implement, but prone to loss of data, by contrast, the binary tree class algorithm accuracy is better, but the higher request to the equipment, and poor real-time performance, this paper proposes a fusion both advantages of the new algorithm, on the basis of the binary tree fusion using the ideas of the time slot, the proposed algorithm by MATLAB simulation test, the test results show that compared with classical algorithm, the new algorithm can not only effectively reduce the collision probability, at the same time because of the whole communication process simplified, the system’s energy consumption has been effectively controlled, the new algorithm is very suitable for small and simple application of RFID in the system.