Research on the Method of Calculating the Effective Position of Information Packets for On-Board Equipment of Multiple Units

In the CTCS-3 train control system, sleep mode is used to manage the non-leading-end train control on-board equipment. When the on-board equipment is in sleep mode, it does not perform train operation safety monitoring but maintains the monitoring of key data and executes functions such as train positioning, speed measurement and distance measurement, recording level conversion and RBC (Radio Block Centre) handover information. Based on the train position, direction, and non-leading-end train direction signal, this article proposes an improved method for calculating the level conversion position and RBC handover position. This method can shorten the operation time after cab change and improve operational efficiency, reduce energy consumption, and comply with the fail-safe principle. The method can not only be applied to domestic high-speed railway lines but also provide technical support for the localized deployment of projects along the Belt and Road Initiative.