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http://dx.doi.org/10.12673/jant.2016.23.6.542

Distributed UORA Scheme for Autonomous Train Communication in Congested Environment  

Ahn, Woojin (Korea Railroad Research Institute)
Kim, Ronny Yongho (Department of Railroad Electrical & Electronic Engineering, Korea National University of Transportation)
Publication Information
Journal of Advanced Navigation Technology / v.23, no.6, 2019 , pp. 542-547 More about this Journal
Abstract
Autonomous train is investigated to increase the capacity of railroad, and the reliability of wireless communication plays a critical role in terms of decreasing the inter-train distance. In this paper, we propose a transmission scheme for autonomous train communication in highly congested environment. The proposed scheme, namely distributed uplink orthogonal frequency division multiple access (OFDMA) random access (UORA), applies the triggered uplink access (TUA) and the UORA, introduced in the sixth generation WLAN standard, IEEE 802.11ax, for communication devices on vehicle and platform in a distributed manner. The simulation results show that the proposed scheme efficiently improves the packet transmission success rate in highly congested channel conditions compared to the conventional enhanced distributed channel access (EDCA) transmission scheme.
Keywords
Automatic train operation; Wireless LAN; Triggered uplink access; Uplink OFDMA random access;
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