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| Comparison and Research on the Adaptability of Different Standard LTE Technology under High - speed Railway Scenario |
| LI Dong |
| (China Railway Communication and Signal Survey & Design (Beijing) Co. Ltd, Beijing 100036, China) |
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Abstract Abstract:Research purposes: When the high - speed railway’s velocity is more than 250 km/h in China at present, it cant normally provide broadband data services of passenger oriented, and it mainly relies on three major operators of existing public 2G/3G/4G ( LTE) network reinforcement to provide voice and data services. By setting up the hardware in the loop simulation platform, it was explored about the adaptability of different standard LTE technology under high - speed railway mobile scenarios, to provide theoretical support for future planning and construction of railway broadband wireless network in China. Research conclusions:(1) FDD - LTE and TDD - LTE technology can provide security and reliability of the train to the broadband wireless communication, FDD - LTE compared with TDD - LTE has more high adaptability. (2)The change trend of FDD - LTE and TDD - LTE standard network block error rate (BLER) and throughput performance is consistent with movement speed. With the increase of the movement speed, the BLER will be increased, the throughput will be reduced; At a speed of more than 300 km/h, TDD - LTE network compared with FDD - LTE network performance will decrease more significantly； At a speed of more than 400 km/h，two standard network performance will significantly decreased; Under the condition of the same speed, FDD - LTE standard network performance is more stable than TDD - LTE standard. (3)The change trend of FDD - LTE and TDD - LTE standard network BLER and throughput performance is consistent with field strength coverage. With the increase of the field strength, the BLER will be reduced to a certain extent, and the throughput will be improved to a certain extent. Especially when the moving speed is higher, it is more obvious to improve the performance of coverage. (4) The research results can provide the basis and reference for the planning and construction of Chinas railway broadband wireless network.
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Received: 18 February 2016
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2016, Vol. 33 
