基于LTE系统的轨道交通辅助定位方法

LTE-based Auxiliary Train Positioning Approach for Urban Rail Transit

为保证城市轨道交通运营安全,针对车载控制器(VOBC)出现故障时,调度人员无法获悉列车位置的情况,利用列车接入单元(TAU)上传长期演进系统(LTE)的无线性能指标进行辅助定位。该系统平时进行车辆实际位置和无线性能指标的大数据拟合,在特殊情况时利用拟合曲线和无线性能指标进行辅助定位,为列车安全运行提供可靠的保障。

When the vehicle controller(VOBC)fails,the dispatcher cannot know the location of the train and will resort to use the wireless performance indicator of the long-term evolution sys­tem(LTE)uploaded by the train access unit(TAU)for train locating.Usually,the system makes big data fitting of the actual position of the vehicle and the performance indicators of radio communication,and uses the fitting curve and performance indicators of radio communication to provide auxiliary positioning in special cases,thus providing reliable guarantee for safe operation of the trains.