Implementation and Verification of a Digital Radio Communication System Simulator for Railway Environment

Abstract

Various radio communication systems have been used in railway systems such as communication-based train control (CBTC) systems, passenger information service systems, wireless sensor networks, etc. The design and evaluation work involved in constructing the radio communication systems used in railway systems is expensive in terms of time and money in the present circumstances. Thus, for the purpose of facilitating this work, the authors have developed a simulation method to calculate the transmission quality (bit errors, packet loss rates, latency, etc.) taking into consideration the railway-specific environment and usage. This paper outlines the features of a digital radio communication system simulator that calculates transmission quality taking into consideration the railway-specific environment and usage. This paper also shows some examples of simulation results and demonstrates the validity of the simulator.

<b>Development of a Telecommunication and Train Operation Simulator for Radio Communication Train Control</b>

“…The Telecommunications and Train Operation Simulator for Radio Communication Train Control is coupled with 3 simulators: "RADTRACE" [1] to simulate radio communication, "TCNET" [2] to simulate communication network performance and "MATRIIX" [6] to simulate train operation. Figure 2 shows the configuration and input-output data of this simulator.…”

“…Indices Ⅰ and Ⅴ are explained in more detail in references [1] and [2], respectively. Index Ⅱ is described in section 4.1.…”

“…Using the method from reference [1], a radio communication quality evaluation was carried out considering radio wave propagation, noise and wave interference. First, 8 base stations were installed, and then the height and position of the antenna and assignment of frequency channels were adjusted.…”

“…Simulation tools to assist the work of radio-link network design have been developed by RTRI [1,2]. These simulators can evaluate a radio communications network taking into account complex radio propagation and interference environments.…”