基于GPS的实时机车运行信息传输系统

利用铁路既有的列车无线调度通信系统和铁路分组交换网络，结合GPS技术，提出了一种实现机车运行信息实时传输的方案。采用话音压缩／扩展和数据同传，使无线列调在原来只传输话音的基础上增加了数据传送，数据仓库又使得这些信息能在铁路相关部门实现共享，可实现机车中低速率的数据传输。

Real-time data transmission system of moving locomotive based on GPS

This paper presented a communication solution of real-time operating data transmission system of moving locomotive by the existed train dispatching radio communication system, the railway packet switched network and GPS. It is pointed that the train dispatching radio, which is developed to add operating data to the analog voice transmission through data-voice synchronous transmission, and voice compressed and expanded techniques, can transmit the real-time information. The data can be shared by railway units with data warehouse. The system is feasible for medium and low speed data transfer. 7 figs, 9 refs.