Reaearch On Anti-collision Algorithm Of Ultra High Frequency RFID For Internet Of Things

Based on the Internet, the Internet of things is a network which exchanging information and communication that makes user extend to all items. It is knownas the third wave of the information industry following the computer and the Internet. Radio frequency identification(RFID) is the key to realize the Internet of things.It is a non-contact automatic identification technology which regard electromagnetic wave as transmission medium that makes bidirectional data communication come true.Ultra high frequency RFID can be applied to the far distance recognition system, which it is widely used in all kinds of fields, such as logistics, transportations and military, while in recognizing multiple targets, low accuracy and time-consuming are still a problem.In order to comply with the development of the Internet of things, RFID technology is developed continuously. It is essential to solve the problem that the collision exists in the process of identification tags in UHF RFID system and it has become the bottleneck of UHF RFID technology development. It makes big difference in the performance of RFID system by choosing a good anti-collision algorithm.The focus of the study is composed of the following parts:Firstly, the DTSB algorithm is proposed by combining the principle of lock in the BLBO algorithm with a novel tag grouping methods. Through compared with BLBO algorithm and other typical improved algorithms after principle analysis and recognition demo, it has concluded that DTSB algorithm had made a great breakthrough in the reader paging times and the paging times was nearly 50% less than the BLBO algorithm.Secondly, the algorithm presented in this article is BIB, which obtained a reader improved backward strategy paging mode on the performance by analyzing of JDS algorithm and NJDS algorithm. Through the simulation analysis, it is concluded that The BIB algorithm can efficiently reduce the number of reader communication and label communication.Finally, a RFID two fork tree anti-collision algorithm simulation platform was developed to construct the RFID two fork tree anti-collision algorithm simulation framework. The platform not only can realize the simulation of communication to RFID system which using different binary tree anti-collision algorithm, but also can collect and count the number of exchanging of reader and label in communication. All in all, it makes the compare of performance between different anti-collision algorithms of binary tree.