基于CTCS-N列控系统的双电台冗余控制方法研究与设计

Research and Design of Redundant Control Method for Double Radios Based on CTCS-N Train Control System

现有的CTCS列控系统大多采用单电台单连接方式实现与核心网的无线连接方案,不能有效保证无线连接的高可靠性和降低系统故障率。设计方案不仅可实现对CTCS列控系统双电台的冗余控制,当在用电台故障时,车载单元会自动选择备用电台重新建立与地面设备安全无线连接,从而保证列控系统的车载设备和地面设备无线通信快速恢复。而且在用电台可同时与多个设备建立多个安全无线连接,大大提高CTCS列控系统的安全性、可靠性、容错性。双电台切换过程虽有一定的时延,但对车载设备和地面设备的无线通信的影响较小。因此在列控系统的未来发展中,双电台冗余控制将成为未来新型列控系统的发展趋势。

For most existing CTCS train control systems,the single-radio and single-connection method is used to achieve wireless connection with the core network,which can neither eff ectively ensure the high reliability of wireless connection nor decrease the system failure rate.The design scheme proposed in this paper can not only achieve redundant control over double radios of the CTCS train control system,but also ensure that after the in-use radio fails,the onboard unit will automatically select the standby radio to re-establish a safe wireless connection with the wayside equipment.Thus,it ensures fast recovery of wireless communication between the onboard equipment and wayside equipment of the train control system.Moreover,the proposed design scheme allows multiple safe wireless connections between the in-use radio and multiple devices.Thus,it greatly improves the safety,reliability and fault tolerance of the CTCS train control system.Although there is some time delay in the switching process of double radios,this has very small impacts on the wireless communication between the onboard equipment and wayside equipment of the train control system.Therefore,redundant control over double radios will become a development trend of new train control systems in the future.