Abstract：Research purposes: As used for the wireless dispatching，the GSM － R technology can not satisfy the demand of the train － ground wide band wireless communication for the high － speed railway． So it is necessary to discuss the scheme for realize the train － ground wide band wireless communication for the purpose of providing the basis and reference to plan and optimization of the schemes for wide band wireless network of the China＇s railway．
Research conclusions: Now the LTE technology is an ideal technology for the train － ground wide band wireless communication． It not only can provide the safe and reliable train － ground wide band wireless communication，but also it is of the development trend of the train － ground wide band communication． At the same time，it tallies with the
gradual tactics and procedure from the GSM － R to LTE － R defined by the International Union of Railways．
李栋. 高速铁路车地宽带无线通信方案比较研究[J]. 铁道工程学报, 2012, 29(3): 85-90.
LI Dong. Comparative Research on Train － ground Wide Band Wireless Communication for High － speed Railway. 铁道工程学报, 2012, 29(3): 85-90.
2012, Vol. 29 
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