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http://dx.doi.org/10.5573/ieie.2015.52.10.021

Analysis of Network Topology for Distributed Control System in Railroad Trains  

Hwang, Hwanwoong (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
Kim, Jungtai (Korea Railroad Research Institute)
Lee, Kang-Won (Korea Railroad Research Institute)
Yun, Ji-Hoon (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.10, 2015 , pp. 21-29 More about this Journal
Abstract
For higher reliability against component failures in railroad trains with many electronic sensors and actuators, a distributed control system with which all electronic components are connected via a network is being considered. This paper compares and analyzes various topologies of Ethernet network for a railroad train in the aspects of (1) failure recovery, (2) the number of ports per device, (3) the number of cable connections between vehicles, and (4) performance. Especially, the unique characteristic of a train system that the number of vehicles changes is considered through analysis. Various combinations of in- and inter-vehicle topologies are considered. In addition, we introduce a hybrid of star and daisy-chain topology for inter-vehicle connection when the maximum number of inter-vehicle connections is limited to reduce possible failures of inter-vehicle connections. Simulation results show performance comparison between different topology combinations; the hybrid topology is shown to enhance delay performance even with a highly limited number of inter-vehicle connections.
Keywords
railroad train network; network topology; distributed control system; Ethernet network;
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