LTE-based rail transit wireless data interference suppression method and system
A wireless data and interference suppression technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve the problem of lack of downlink beamforming algorithm and complex algorithm implementation, and achieve easy adjustment, reduce co-channel interference, The effect of reducing distractions
Active Publication Date: 2020-01-07
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology
One of the difficulties in implementing beamforming is the accuracy of downlink channel estimation, and the other is the lack of an effective downlink beamforming algorithm. The implementation of existing algorithms in products is relatively complicated.
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[0036] The technical solution of the present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.
[0037] In the rail traffic scene, since the running track of the train vehicle terminal is fixed, the moving and stationary points have strong periodicity, so the present invention combines the characteristics of this scene to design a new beam beam suitable for the rail traffic scene shaping to reduce co-channel interference between different line networks.
[0038] The beam pattern is set according to the subway train arrival schedule, so that the base station adopts a fixed beam pattern at a specific time point, so that the target base station can use beamforming to maximize the signal power in the direction of the target UE. At the same time, the interfering base station also uses beamforming to align the null trap direction to UEs of different networks to minimize the interference to the UE, so as to reduce the same-...
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The invention provides an LTE (Long Term Evolution)-based rail transit wireless data interference suppression method and system. The method includes the following steps that: beam patterns corresponding to working time periods are preset for each base station of stations according to a station train arrival and stop timetable; and when the base stations are working, beamforming is carried out according to the preset beam patterns. According to the beamforming, when a certain train arrives at a station, two base stations in a network corresponding to the train project beams to corresponding UE on the train respectively according to the preset beam patterns; and when trains of two different lines arrive at a station simultaneously, base stations in two networks, which use the same frequency band, carry out beamforming according to frequency bands, and project beams of a part of frequency bands to UE corresponding to the base stations. With the method and system of the invention adopted, the problem of co-channel interference between train LTE data transmission networks can be solved; and when frequency band resources are limited, signal power in the azimuths and directions of target UE can be improved to the great extent through time-dependent beamforming, and the co-channel interference of the stations can be reduced.
Description
technical field [0001] The present invention relates to the technical field of rail transit wireless communication, and more specifically, the present invention relates to an LTE-based rail transit wireless data interference suppression method and system. Background technique [0002] Urban rail transit system (including subway, light rail, etc.) is an important means and effective measure to solve traffic problems in big cities. It has the advantages of large transportation volume, fast speed, safety, punctuality and comfort, and can drive the comprehensive development and utilization of urban land resources It is of great significance to the long-term development of the city. At the same time, with the rapid development of information and communication technology to broadband, the demand for rail transit information construction is also increasing. As the key system of rail transit informatization, the train-to-ground wireless communication system of rail transit is mainl...
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IPC IPC(8): H04W16/10H04W16/18H04W16/28H04W28/02
CPCH04W16/10H04W16/18H04W16/28H04W28/0236
Inventor 印翀余刚
Owner WUHAN POST & TELECOMM RES INST CO LTD