High-speed train wireless communication device and method

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...

AI Technical Summary

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 construction, and the communication signals between each user in the train and the base station or repeater experience fast fading channels, so the traditional method cannot effectively solve the problem of high data rate coverage in indoor and other high shadow environments.

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