Radio frequency identification tag anti-collision method based on physical layer network coding

Abstract

The invention provides a radio frequency identification tag anti-collision method based on physical layer network coding. According to the method, aiming at the problem that a multi-tag anti-collision method in radio frequency identification is low in read-write speed, a physical layer network coding through is introduced, multi-tag collision information discarded by the traditional anti-collision method is used for decoding the information of the tags which have not been read, so that interaction between a reader-writer and each tag is reduced, and identification speed of the plurality of tags is improved. Compared with the existing radio frequency identification tag anti-collision method, the invention applies physical layer network coding into the radio frequency identification tag anti-collision method, utilizes the multi-tag collision information discarded by the traditional anti-collision method to perform physical layer network coding operation with the read tag information to decode to obtain the information of the tag which have not been read, and thereby interaction between a reader-writer and each tag is reduced, and read-write speed of the plurality of tags by using the anti-collision method is improved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification, specifically a radio frequency identification tag anti-collision method based on physical layer network coding, which is mainly suitable for solving the problem of multi-label conflict identification in a radio frequency identification system, and introduces the idea of ​​physical layer network coding into radio frequency identification In the tag anti-collision method, based on the binary tree search algorithm, the physical layer network coding technology is used to analyze and utilize the multi-label conflict data information discarded by the traditional method, so as to improve the identification efficiency of the radio frequency identification system for multiple tags. Background technique [0002] Radio Frequency Identification (RFID) technology is an automatic identification technology. RFID does not require the identified object to work within the line of sight of th...

AI Technical Summary

Problems solved by technology

Compared with the existing radio frequency identification tag anti-collision method, its particularity and innovation lies in that this method introduces the physical layer network coding technology, utilizes the multi-label superposition conflict information discarded in the traditional method, analyzes and utilizes it Useful information, improve the recognition speed and computing overhead of the RFID system for multi-tags, and solve the problems of low efficiency and high overhead for the existing RFID tag anti-collision methods for multi-tag identification

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