High-speed train wireless communication device and method

A technology for wireless communication devices and high-speed trains, applied in radio relay systems, communication between multiple stations, active electrical relay systems, etc., can solve the problem of increasing the cost of mobile network construction and cannot effectively solve the problem of high data rate coverage and other issues to achieve the effect of avoiding the impact of transmission performance, high-speed communication, and high data rate transmission

Inactive Publication Date: 2011-02-23
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0004] General high-speed rail mobile communication systems improve communication quality by increasing the coverage density of base stations and placing fixed repeaters, such as figure 1 As shown, this significantly increases the cost of mobile network constructi

Method used

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  • High-speed train wireless communication device and method
  • High-speed train wireless communication device and method
  • High-speed train wireless communication device and method

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Embodiment Construction

[0037] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described, and the high-speed rail mobile communication system downlink that receives with multi-antenna is illustrated as an example, suppose that base station (1), relay station (4) and each user end are all equipped with M antennas , there are two signal transmission links of base station (1)-relay station (4) and relay station (4)-user end.

[0038] In the environment of high-speed train operation, such as figure 2 As shown, since the channel gain of the relay station (4)-user terminal link is higher than that of the base station (1)-relay station (4) link, the relay station (4)-user terminal link can support a higher rate. In order to prevent waste of wireless resources, the two transmission links are matched to each other by adjusting the ratio of the transmission time of the two links, and the principle is as follows.

[0039] Let T be the transmission ...

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Abstract

The invention relates to a mobile communication system of trains, planes and the like in a high-speed moving environment, in particular to a high-speed train wireless communication device and a high-speed train wireless communication method, and belongs to the field of wireless information transmission. In a communication way provided by the invention, a relay station is arranged on a high-speed train, and a channel transmission environment between each user and the relay station is relatively static or moves at a low speed and can support relatively high data speed transmission. A high-speed mobile channel is formed between the relay station and a base station. High-speed communication between a user and the base station can be realized by optimally designing the transmission way between the relay station and the base station. Influence of train body penetration loss of the high-speed train on transmission performance can be avoided by reasonably arranging the relay station on the train.

Description

technical field [0001] The invention relates to mobile communication systems such as trains and airplanes in a high-speed mobile environment, and belongs to the field of wireless information transmission. Background technique [0002] In recent years, my country's high-speed railway has achieved rapid development. It is estimated that by 2020, China's high-speed railway construction mileage of 200 kilometers per hour and above will exceed 18,000 kilometers, accounting for more than half of the world's total mileage of high-speed railways. In the high-speed railway environment, due to the Doppler effect caused by high-speed movement, the center frequency of the wireless signal shifts, causing the deterioration of the wireless channel environment, and the high-speed movement has stricter time requirements for mobile user access and handover, which is prone to mobile network coverage There are a series of problems such as insufficient overlapping areas, decreased handover succe...

Claims

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Application Information

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IPC IPC(8): H04B7/15H04B7/26
Inventor 黎海涛周美红
Owner BEIJING UNIV OF TECH
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