Multi-reader anti-collision method, device and equipment for RFID tag access

Abstract

The invention provides a multi-reader anti-collision method, device and equipment for RFID tag access. The method comprises that: the time slot state of each reader is utilized; M rounds of iterativetraining are performed on a preset Actor-Critic network model, and, after the reader anti-collision model with the optimal reader time slot allocation strategy is obtained, the reader anti-collision model is utilized to allocate the time slot to each reader, so that the RFID tag is accessed according to the time slot allocated to each reader, and the reader collision problem in the tag access process of the RFID system is effectively avoided. By the adoption of the technical scheme, changes of the RFID system can be dynamically adapted, the operation and maintenance difficulty of the RFID system is reduced, and the collision probability of the reader is reduced.

Description

Technical field [0001] The invention relates to the technical field of event detection, and in particular to a method, device and equipment for preventing collisions of multiple readers with RFID tag access. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology, which mainly uses radio frequency to read and write recording media to achieve the purpose of identifying targets and data exchange. It has high reliability and identification. High speed, dynamic real-time communication and other advantages. An RFID system is mainly composed of RFID tags, readers, and software systems. Since RFID systems often need to deploy a large number of readers, there is a high possibility of "reader-RFID tag" collisions during the communication process of the RFID system. The problem, "reader-RFID tag" collision refers to the overlap of the recognition areas of multiple readers, which causes the RFID tags in the overlapped area to...

AI Technical Summary

Problems solved by technology

Although this method can play a certain anti-collision effect, it requires high time synchronization between readers and cannot adapt to the dynamic changes of the RFID system.

For the method based on power adjustment, represented by PPC algorithm, this method is to adjust the transmitting power of the reader in different time slots according to a certain probability distribution, so as to dynamically adjust the recognition range of the reader to reduce the gap between the reader and the reader. However, when the position of the reader changes frequently or when a new reader is added, it is difficult to set the parameters of the probability distribution, which greatly increases the difficulty of the operation and maintenance of the RFID system.

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