Abstract
Nowadays, the train-ground communication systems of communication based train control systems (CBTC) are based on Wireless Local Networks (WLAN). However, WLAN is not designed for urban rail transit systems. It is susceptible to wireless interference, and high-speed movement environment. Long Term Evolution (LTE) technology is getting popular in train-ground communication systems for its high transmission speed and anti-interference capability. Despite the advantages of LTE technologies, little research has been done to study the reliability of LTE based CBTC train ground communication systems based on experimental data. In this paper, the performance requirements of CBTC train ground communication systems are analyzed according to the principle of CBTC. We define the system reliability based on the packet delay and loss rate performance. The real test environment is set up, and the performance parameters of the train-ground communication are tested. Using the experimental results, we conduct a numerical computation for system reliability. The numerical results show that the reliability of the train-ground communication based on LTE technology satisfies CBTC requirements.
Published Version
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