Journal
IEEE TRANSACTIONS ON COMMUNICATIONS
Volume 68, Issue 4, Pages 2381-2393Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2020.2968438
Keywords
RFID; anti-collision; bit query; bi-response; communication complexity
Funding
- Natural Science Foundation of China [61802196, 61872082, 61472184]
- Natural Science Foundation of Jiangsu Province [BK20180791]
- Natural Science Foundation of Jiangsu Higher Education Institution of China [17KJB510036]
- Startup Foundation for Introducing Talent of NUIST
- Guangdong Leading Talent Program [2016LJ06D658]
- National Science Foundation [CNS-1837146]
- Soft Science Program of China Meteorological Administration, Priority Academic Program Development of Jiangsu Higher Education Institutions, and Engineering Research Center of Digital Forensics, Ministry of Education
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The tag collision avoidance has been viewed as one of the most important research problems in RFID communications and bit tracking technology has been widely embedded in query tree (QT) based algorithms to tackle such challenge. Existing solutions show further opportunity to greatly improve the reading performance because collision queries and empty queries are not fully explored. In this paper, a bit query (BQ) strategy based M-ary query tree protocol (BQMT) is presented, which can not only eliminate idle queries but also separate collided tags into many small subsets and make full use of the collided bits. To further optimize the reading performance, a modified dual prefixes matching (MDPM) mechanism is presented to allow multiple tags to respond in the same slot and thus significantly reduce the number of queries. Theoretical analysis and simulations are supplemented to validate the effectiveness of the proposed BQMT and MDPM, which outperform the existing QT-based algorithms. Also, the BQMT and MDPM can be combined to BQ-MDPM to improve the reading performance in system efficiency, total identification time, communication complexity and average energy cost.
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