Research And Application Of RFID Technology Anti-collision Algorithm In Internet Of Things

Radio frequency identification, RFID(radio frequency identification) technology, also known as radio frequency identification(RFID) is a kind of communication technology,so as to realize the automatic recognition of the non contact type of objects by using the spatial coupling of the RF signal without recognition system with specific target between a mechanical or optical contact. Wireless radio frequency identification data is large,the recognition time is short, the data confidentiality is good and so on. Therefore, it has been developed rapidly in many fields such as manufacturing, public service, logistics and supply chain management. Because of its unique advantages, many countries in the world have put in a lot of financial and material resources to carry out research and promotion.Although the RFID technology has many advantages, but there are also some problems that restrict its development. Such as: the cost and label system compatibility issues and problems of anti collision algorithm etc.. The main research content of this paper is for anti collision of RFID system, through the existing anti-collision algorithm analysis and research, of RFID tag anti collision algorithm of some new changes proposed new anti-collision algorithm.First of all, this paper on the Internet of things, and RFID systems were briefly introduced, and then to RFID anti-collision problem were introduced in this paper, the definition including the collision, collision judgment and current important anti-collision algorithm. Focuses on the uncertain algorithm Aloha algorithm and deterministic algorithm for the class tree algorithm of several compared with representative algorithms,including P-ALOHA(pure Aloha) algorithm and s-aloha(slotted ALOHA) algorithm, the FSA(frame slotted ALOHA) algorithm and the DFSA(dynamic frame slotted ALOHA algorithm and BS(binary search) algorithm,BT(binary tree) algorithm and other mixed algorithm.Secondly, according to the problem of query tree algorithm in different application environment, a new algorithm based on the improved query tree(MQT) algorithm is designed in this paper. This algorithm makes full use of the reader to receive the information of the first collision bit information,the reader according to the different to get this collision bit information to decompose the corresponding tag group. The two counter in the tag is the record of the reader's query history,so that the reader no longer need to send the entire tag query prefix sequence,and just send the last one of the current query sequence prefix. After the simulation analysis of the algorithm,this algorithm has obvious improvement on the communication load and the recognition speed compared with the query tree algorithm and the collision tree algorithm.At last,this paper introduces the application of radio frequency RFID technology in the storage management of iron and steel enterprises.