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Fan-shaped position-fairness-based wave beam transmission method applied to high-speed-rail wireless-communication

A technology of wireless communication and transmission method, which is applied in the directions of location information-based services, wireless communication, vehicle wireless communication services, etc., and can solve problems that cannot be solved directly.

Inactive Publication Date: 2019-03-08
EAST CHINA NORMAL UNIV
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Problems solved by technology

The joint beam optimization problem is usually a non-convex problem in the scenario where two trains meet and cannot be solved directly

Method used

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  • Fan-shaped position-fairness-based wave beam transmission method applied to high-speed-rail wireless-communication
  • Fan-shaped position-fairness-based wave beam transmission method applied to high-speed-rail wireless-communication
  • Fan-shaped position-fairness-based wave beam transmission method applied to high-speed-rail wireless-communication

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Embodiment Construction

[0054] In order to more clearly illustrate the technical means, technical improvements and beneficial effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] A sector-based position-fair beam transmission method applied to high-speed rail wireless communication provided by the present invention, see figure 1 , figure 2 , image 3 and Figure 4 , including the following specific steps:

[0056] S101: Establish a sectorized beam structure, the base station covers the railway with N beams, and the space and frequency domains covered by the N beams do not intersect each other.

[0057] For this step see figure 2 The schematic diagram shown is:

[0058] The spatial frequency domain covered by the base station is Θ=(-θ 0 , θ 0 ), let the spatial beamwidth of each beam be N is the number of beams, 1≤Nk Covered spatial frequency domain range k=1,...,N, is the signal emission angl...

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Abstract

The invention discloses a fan-shaped train position-fairness-based wave beam transmission method applied to high-speed-rail wireless-communication. The method comprises the steps of: establishing a fan-shaped wave beam structure, and covering a railway by a base station through the N wave beams; using position information of a train to maximize average receiving power in a wave beam range, satisfying instantaneous receiving power stability of a train at different positions in the wave beams, and carrying out wave beam optimization on a scene of the train; for a scene where two trains meet, satisfying instantaneous receiving SINR stability of each train through maximizing a total transmission rate, and optimizing wave beam pairs; and carrying out offline calculation and storage on the wavebeams in all the scenes, and selecting a wave beam by the base station according to position information of a train for data transmission. The invention provides the wave beam transmission method, which is for high-speed-rail communication and about position-fairness, through fan-shaped wave beam coverage on a coverage area of the base station for covering the wave beams of a wider range, and impacts brought by Doppler frequency shift and path loss changes are overcome.

Description

technical field [0001] The invention relates to the technical field of high-speed rail wireless communication, in particular to a sectorized position-fair beam transmission method using high-speed rail position information. Background technique [0002] The rapid development of high-speed railways in recent years, especially in China, has triggered a rapid increase in the demand for high-quality wireless communications in high-mobility scenarios. As an important scene of the next-generation (5G) communication system, the high-speed rail scenario provides users on the high-speed rail with a variety of services, such as online shopping, social networking, and watching videos. The Doppler brought by high-speed movement makes traditional mobile communication systems face challenges when applied in high-speed railway scenarios. Therefore, it is particularly important to provide high-speed railway users with fast and stable information transmission. When the number of antennas is...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W4/42H04W16/28
CPCH04W4/02H04W4/42H04W16/28
Inventor 刘细妹乔德礼
Owner EAST CHINA NORMAL UNIV
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