Self-adapted multi-beam forming and beam switching method of millimeter wave high-speed rail train-ground communication

A beam switching and vehicle-to-ground communication technology, applied in diversity/multi-antenna systems, space transmit diversity, radio transmission systems, etc., can solve the problem of not being able to obtain the optimal capacity of the system at any time in real time, so as to reduce the probability of communication interruption and improve The effect of optimizing capacity and communication quality

Active Publication Date: 2019-02-15
NANJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

However, this paper activates different numbers of antennas by dividing the area where the train passes, and cannot obtain the optimal capacity of the system at the current moment in real time.

Method used

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  • Self-adapted multi-beam forming and beam switching method of millimeter wave high-speed rail train-ground communication
  • Self-adapted multi-beam forming and beam switching method of millimeter wave high-speed rail train-ground communication
  • Self-adapted multi-beam forming and beam switching method of millimeter wave high-speed rail train-ground communication

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Experimental program
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Embodiment 1

[0101] Such as figure 1 As shown, both the transmitting base station and the receiving mobile relay node in the high-speed rail communication system of this embodiment use antenna arrays to transmit and receive signals. The transmitting base station and the vehicle-mounted mobile relay node adopt N T and N R Uniform linear array of antenna elements. The train length is L train , a total of N S Each car is equipped with a vehicle-mounted mobile relay node MR on the top of each car. The distance between adjacent MRs is l (25m), and the arrival angle of the transmitting beam to the i-th mobile relay node is set to φ i . The transmitting base station uses millimeter waves to simultaneously transmit L beams of different widths to transmit signals (L≤N S ).

[0102] Among the L activated beams (i.e. the activated beam set B opt ), the i-th beam is formed by figure 2 determined by the beam allocation scheme shown. In the coverage area of ​​a transmitting base station, the ...

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Abstract

The invention provides a self-adapted multi-beam forming and beam switching method of millimeter wave high-speed rail train-ground communication. The self-adapted multi-beam forming and beam switchingmethod of the millimeter wave high-speed rail train-ground communication first performs multi-beam forming, then performs multi-vehicle-mounted mobile relay node beam allocation, then performs beam switching, then establishes a capacity optimization problem, and finally activates an optimal beam. The self-adapted multi-beam forming and beam switching technique of the millimeter wave high-speed rail train-ground communication adopted by the invention can not only significantly increase the capacity of a high-speed rail wireless communication system, but also reduce the communication interruption probability of the entire system.

Description

technical field [0001] The invention relates to a high-speed rail mobile communication and millimeter-wave multi-beam wireless transmission technology, in particular to an adaptive multi-beam forming and beam switching method for millimeter-wave high-speed rail vehicle-to-ground communication, which belongs to the technical field of wireless mobile communication. Background technique [0002] With the rapid development of high-speed railways, various intelligent devices (such as surveillance, video recording, etc.) will be put into high-speed railways. These devices and the users on the trains have an increasing demand for high-speed and high-reliability services in high-mobility scenarios. The data rate provided by the existing GSM-R (Global System for Mobile Communications-Railway or GSM-Railway) system can no longer meet these requirements, and the upgraded LTE-R (Long Term Evolution-Railway) system has not yet formed a unified standard. Therefore, how to greatly increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/06H04B7/08H04B17/391
CPCH04B7/043H04B7/0617H04B7/0695H04B7/088H04B17/3912
Inventor 徐友云尹惠蒋锐李大鹏陈建平王云峰
Owner NANJING UNIV OF POSTS & TELECOMM
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