Abstract: In order to solve the problem of wireless loading of line data for heavy-haul railways and normal-speed railways and minimize the dependence on the coverage of wireless network, it is proposed that under the condition of wireless network coverage only at stations, the line data within the train path can be searched in real time according to the train running direction, train location, section length, turnout position and section locking direction, and accurately sent to the train in point-to-point mode. Under the condition that the section is not covered by wireless network, the prefabricated line data of the section is sent to the train in advance at the station in point-to-point fixed period. The on-board equipment judges the location of the estimated front end of the train, adopts the station line data or the section line data, and calculates the distance-to-go continuous speed curve according to the track circuit code to monitor the safe operation of the train. The proposed method effectively reduces the requirements of wireless communication range for line data loading, and reduces the implementation difficulty and investment cost of line transformation.

Key words: line data boarding, wireless network range, search traffic path, track circuit coding, continuous speed curve, region wireless communication, train control switching

摘要： 为解决重载铁路及普速铁路线路数据无线上车问题，同时最大化减少对无线网络覆盖范围的依赖，提出仅车站区域覆盖无线网络条件下，地面设备根据列车运行方向、列车位置、区段长度、道岔位置和区段锁闭方向实时搜索行车路径内线路数据，并采用点对点方式精准发送给列车。区间未覆盖无线网络条件下，在车站提前将区间预制线路数据，采用点对点固定周期方式发给列车。车载设备判断列车估计前端所在位置，采信车站线路数据或区间线路数据，并根据轨道电路发码计算目标-距离连续速度模式曲线，监控列车安全运行。有效降低线路数据上车对无线通信范围的要求，减小线路改造实施难度及投资成本。

关键词: 线路数据上车, 无线网络范围, 搜索行车路径, 轨道电路发码, 连续速度模式曲线, 区域无线通信, 控车切换