Channel Modeling for Overhead Line Equipment for Train Communication

Abstract

The demand for high-speed data access to railway infrastructure and internet broadband data in railway is increasing due to the high density of the trains and passengers. Currently, communication access in trains is based on radio frequency (RF) wireless access networks that are slow and insufficient for the demands of the high-speed railway (HSR) and its customers. However, performance, service attributes, frequency band, and industrial support should be considered for the selection of a suitable communication system that can fulfill the requirements of HSR operation. This paper investigates overhead line equipment (OLE) as access network connecting trains to the backbone communication networks. The ABCD transmission model is used to represent the transfer function of the OLE channel. It was shown that transmission over OLE is affected by the frequency and link distance. The simulation results also show that the channel gain of the OLE channel attenuated faster at higher speeds compared to train movement at lower speeds.

Broadband Power Line Communication in Railway Traction Lines: A Survey

“…Top-down 0-35 Railway to wayside communication Gheth et al [15] 2020 Bottom-up 10-30 Train speed influence in data transmission…”

“…Finally, the capacity decreased over distance for all frequencies in the range of interest. Gheth et al,in [15], proposed a simplified system of the overhead power line for the two-port network model in order to represent its frequency response. The simulation considered the length variation of the transmission line according to the train movement.…”

“…These exploit the high-frequency range, namely, the HF band of the electromagnetic spectrum, and employ suitable solutions to transmit a relevant amount of data in a reduced time interval [14]. More specifically, railway operators have fostered the concept of broadband traction power line communication (BTPLC), where the electric traction line is exploited as a channel for broadband communications rather than for simple signaling and control operations [15].…”

Communication systems of high‐speed railway: A survey

“…In our study, 119 we investigated using the overhead line equipment (OLE) as access network connecting trains to the backbone communication networks. These lines are used to deliver electricity from feeder substations to the trains so they could move.…”