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http://dx.doi.org/10.7782/JKSR.2014.17.6.402

A Distributed Wireless Local Area Network (WLAN) Access Scheme for Efficient WLAN Communication in Busy Train Stations  

Koh, Seoung-Chon (Department of Railway System, Seoul National University of Science and Technology)
Choi, Kyu-Hyoung (Department of Railway Electrical & Signaling Engineering, Seoul National University of Science and Technology)
Kim, Ronny Yongho (Department of Railroad Electrical and Electronics Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean Society for Railway / v.17, no.6, 2014 , pp. 402-409 More about this Journal
Abstract
Wireless local area network (WLAN) is a widely used wireless access method due to its easy usability and excellent performance. However, its performance degrades significantly as the number of users increases. In busy train stations, where the number of WLAN users are large and, more importantly the number of simultaneous packet transmission attempts is extremely large due to the time synchronization upon train arrival, the packet transmission delay problem is very severe and almost impossible for WLAN stations to initiate communication with WLAN networks. In this paper, a novel distributed WLAN access scheme for efficient WLAN communication in busy train stations is proposed. Using the proposed scheme, WLAN access delay can be significantly reduced under highly congested traffic environments. Therefore, a significant performance enhancement for the WLAN performance used in the Communication Based Train Control (CBTC) can be achieved.
Keywords
CBTC; Medium access; MAC access delay; Wireless LAN;
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Times Cited By KSCI : 1  (Citation Analysis)
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