شناسایی فرکانس رادیویی
Abstract
1-Introduction
2-GDQT Algorithm Description
3-Algorithm Performance and Simulation Result Analysis
4-Conclusion
References
Abstract
In order to solve the problem of RFID tags collision in the current logistics system. Based on the study of existing anti-collision algorithms, a grouped dynamic frame slot with query tree (GDQT) algorithm was designed for a large number of labeling scenarios in logistics management. The GDQT algorithm first estimates the number of tags that have not been identified after each round of identification by the tag estimation algorithm, if less than or equal to 354, the tags were first identified using the dynamic frame slot ALOHA (DFSA) algorithm., and then using the query tree algorithm (QT) for the remaining tags identification. If the number of unrecognized tags was greater than 354, the tags should be first grouped, and then DFSA and QT would be used for tags identification. The simulation results showed that GDQT algorithm can improve system throughput rate and keep throughput rate at around 0.82, which is 300%, 120%, 50% higher than the DFSA algorithm, GDFSA algorithm and AHT algorithm respectively. Therefore, The GDQT algorithm has a good application prospect in the logistics system.
Introduction
Radio frequency identification (RFID) is a non-contact automatic identification technology for communication between tags and readers [1]. And it is widely used in logistics system, book management, large shopping supermarkets, intelligent transportation, intelligent packaging management and other fields [2]. This paper mainly studies the application of RFID in logistics system management. The principle is to implant RFID tags in the logistics system, and the data can be recognized, counted and judged by the reader, no need to manually scan one by one, which greatly saves manpower and material resources [3]. Because of the multi-tag collision of RFID in the logistics system, how to read the tag data accurately and quickly without collision is one of the problems that need to be studied and solved in the application of RFID in the logistics system management [4].