Research on Shanghai Rail Transit Signaling System Evolution Scheme

Abstract

Objective With the rapid development of urban rail transit, the operational volume of trains has significantly increased. The existing CBTC (communication-based train control) system can no longer meet the signaling system needs of high-density operations, necessitating the research into urban rail transit signaling system evolution scheme. Method An evolution scheme for urban rail transit signaling system is proposed, with transitioning from an up-down backup degradation operation mode to a left-right mutual backup redundancy mode in the event of single-point failures in signaling system. First, the ZC (zone controller) and CI (computer interlocking) systems are merged to decrease signaling system framework levels. Then, the ATS (automatic train supervision) system is improved to a hot standby redundancy structure for Ethernet heartbeat information exchange. Additionally, a highly redundant DCS (data communication system) architecture is designed to achieve physical isolation between core signal operations. Finally, the on-board signaling system is modified to a head-tail redundancy structure, enabling seamless switching between primary and backup modes. Result & Conclusion The proposed method significantly enhances the reliability and availability of the signaling system, ensuring seamless operations during failures, maintaining system stability and continuity under high-density operations.

Keywords

• urban rail transit
• signaling system
• evolution scheme
• seamless malfunction operation