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| Comparative Research on Train － ground Wide Band Wireless Communication for High － speed Railway |
| LI Dong |
| China Railway Communication and Signal Survey and Design ( Beijing) Co． Ltd，Beijing 100036，China |
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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．
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Received: 26 August 2011
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2012, Vol. 29 
