Train-to-Ground communications of a Train Control and Monitoring Systems: A simulation platform modelling approach

Under the SAFE4RAIL project, we are developing a simulation platform based on a discrete-events network simulator.
This platform models the Train-to-Ground (T2G) link in the framework of a system-level simulation of
Train Control Management System (TCMS). The modelled T2G link is based on existing wireless technologies,
e.g. Wi-Fi and LTE. Different T2G scenarios are defined in order to evaluate the performances of the Mobile
Communication Gateway (managing train communications) and Quality of Services (QoS) offered to TCMS applications
in the context of various environments (regular train lines, train stations, shunting zones, etc.) while
varying the number of communicating trains, train’s speed, radio channel characteristics (delay spread, channel
attenuation, etc.). This paper focusses on the design and validation of the TCMS transmission over Wi-Fi/LTE via
an approach based on simulation. This simulation platform aims to be also used to test actual TCMS equipment’s,
i.e. Mobile Communication Gateway and Ground Communication Gateway, connected to it through Hardware-
In-the-Loop facilities of the chosen discrete-events network simulator.