The Slotted-LBT: A RFID Reader Medium Access Scheme in Dense Reader Environments

RFID technology as a core technology for realizing ubiquitous environment is emerged. Although it was developed rapidly in the past few years, the read rate is still a concern in the RFID technology adoption. At the same time it is also a technical issue which must be resolved. In order to increase...

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Bibliographic Details
Main Authors: Cheng-Hao Quan, Jin-Chul Choi, Gil-Young Choi, Chae-Woo Lee
Format: Conference Proceeding
Language:English
Subjects:
Access protocols
Bandwidth
Frequency
Interchannel interference
Pervasive computing
Radiofrequency identification
RFID tags
Supply chain management
Telecommunication computing
USA Councils
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Summary:RFID technology as a core technology for realizing ubiquitous environment is emerged. Although it was developed rapidly in the past few years, the read rate is still a concern in the RFID technology adoption. At the same time it is also a technical issue which must be resolved. In order to increase the read rate, a number of researches have focused on the air protocol method and the medium access method. In this paper, we propose a distributed Slotted-LBT method to increase the number of readers which can read tags simultaneously, to provide a stable channel access time, and to reduce the interference among readers by using a channel zone. From the results in this research, compared with the existing normal LBT method, the proposed Slotted-LBT method shows that the coefficient of variation for the channel access time is reduced from 96% to 38% and the effect of interference is reduced by 28.48%. Besides, since each channel can be controlled separately, we can use categorized channels according to demanding features of manifold applications.
ISSN:2374-0221
2573-7635
DOI:10.1109/RFID.2008.4519369