Abstract
The security and Quality-of-Service (QoS) provisioning are two critical themes in urban rail communication-based train control (CBTC) data communication systems, which can directly affect the train's safe operation. In this paper, we design the novel train-centric CBTC systems using train-to-train (T2T) wireless communication with the innovative security check scheme. The local security certification and cooperative security check are proposed to detect and defense the Sybil attack based on the CBTC T2T communications. The quantized Age of Information (AoI) is used as an integrated QoS and security indicator of the train-centric CBTC data communication systems. The proposed AoI indicator fully considers the impact of the packet drop and re-transmission, Sybil attack, and the cooperative security check on CBTC systems. The policy-based asynchronous reinforcement learning is utilized to improve the integrated AoI performance. The simulation results show that the proposed cooperative security check scheme with the optimization model can achieve improved integrated AoI performance, compared with the traditional security check scheme. Moreover, with the help of the cooperative security check scheme, we detect and defense the Sybil attack against the train-centric CBTC systems with much higher probability.
Highlights
The rapid development of urbanization offers great hope for a smart city in near future
We discuss the integrated Age of Information (AoI) improvement of LTE-T2T based wireless communication systems in traincentric communication-based train control (CBTC) based on different security schemes
WORK The QoS of CBTC wireless communication systems is very important in urban rail transit system
Summary
The rapid development of urbanization offers great hope for a smart city in near future. 2) Local security certification and cooperative security check are proposed as Sybil attacks detection and defense scheme in train-centric CBTC systems. The traditional security check scheme including Configuration, Security authorization, and Data exchange can be introduced in detail as follows: 1) CONFIGURATION PHASE When a train wants to establish a T2T link, the onboard CPE exchanges the configuration message with the ID control center to apply the secret keys and be pre-configured by using the address of the ID control center. To improve the security level of train-centric CBTC systems, a cooperative security check scheme for train-centric CBTC systems is proposed to detect and defense the Sybil attack from malicious attackers
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