GSM-R是一种新的铁路专用无线通信网络，作为传输各种调度命令、无线车次号校核、列控监测等信息的通信平台，传输的可靠性已经成为许多人关注的研究课题。笔者分析了高速环境下无线信道的特性； 结合环境特点提出了高速条件提高GPRS传输可靠性的具体方法。

GSM-R is a new railway dedicated wireless communication network．As a communication platform for transmission of dispatching command，wireless train number calibration，train control monitoring and other information，the transmission reliability is becoming a research subject concerned by many people．The writer analyzes the characteristics of wireless channel under high speed condition and presents detailed method to improve GPRS transmission reliability under high speed condition combined environmental features．