Improved T2T based Communication-Based Train Control Systems Through Cooperated Security Check

The high-efficiency and security-guarantee of wireless communication systems are critical in urban rail transits, which are related to the safe operation. In this paper, the designed train-centric communication-based train control (CBTC) systems are established based on train-to-train (T2T) wireless communication firstly. Then, a novel cooperated security check scheme is served as the security assurance function in this T2T scenario to reduce the hazard from Sybil attacks. The quantized age of information (AoI) is used as a Quality of Service (QoS) indicator of the CBTC wireless communication systems in urban rail transit. Simulation results show that the proposed LTE-T2T based wireless communication systems can achieve improved system AoI performance compared with traditional systems. Furthermore, with the help of cooperated security check scheme, the defense function against the Sybil attack of proposed T2T is shown better than normal T2T based wireless communication systems.