Research And Application Of RFID Anti-collision Algorithm

The Radio Frequency Identification (RFID) technology is a kind ofnon-contact multi target of the automatic identification technology used bywireless radio frequency signal. RFID is considered to be one of the mostvaluable technologies in modern society. It has a promising application prospectin the public management, ID card, large-scale warehousing and other areas. Ithas brought a huge change in our social life. But in actual use, RFID technologystill exists some problems, such as the collision problem when muti-tags identifyat the same time.Firstly, this paper analyzes the composition of the RFID system andtechnology. We conducted a study which is based on against the background,significance and research status at home and abroad in detail in this paper.Secondly, on the basis of principle，the thesis researches the anti-collisionalgorithm deeply, the article details the analyses of two common anti-collisionalgorithms, ALOHA algorithm based on random and binary-based algorithmbased on deterministic.Thirdly, based on the simulation analyzing the deficiency of the two kindsof algorithm, we put forward the improved algorithms based on the twoalgorithms and their performance analyses respectively. An improved algorithmis based on ALOHA algorithm. In the improved algorithm，the tag estimationalgorithm is optimized and the allocation of time slot process is improved toreduce the occurrence of the collision. Another algorithm is an improvedalgorithm based on binary using of collision bits as a query command andidentification the tags quickly. Simulate the algorithms using the MATLAB andanalyze the advantages of improved algorithm compared with the existingalgorithm.Finally, it sums up and analyzes the shortage of the improved algorithmand puts forward an outlook for further research.