Massive MIMO multi-cell cooperative beam distribution method under millimeter wave

A technology of multi-cell cooperation and allocation method, applied in the field of communication, can solve problems such as inter-cell interference and cell densification, and achieve the effects of reducing complexity, improving uneven distribution, and shortening average search time

Active Publication Date: 2016-05-04
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of cell densification and inter-cell interference in multi-cell cooperation during antenna beamforming and beam selection. The present invention provides a MassiveMIMO multi-cell cooperative beam allocation method under millimeter waves

Method used

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  • Massive MIMO multi-cell cooperative beam distribution method under millimeter wave
  • Massive MIMO multi-cell cooperative beam distribution method under millimeter wave
  • Massive MIMO multi-cell cooperative beam distribution method under millimeter wave

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Embodiment Construction

[0034] to combine figure 1 Describe this embodiment, the MassiveMIMO multi-cell coordinated beam allocation method under millimeter wave described in this embodiment,

[0035] Step 1. Based on single-cell multiplexing, consider the interference relationship between beams inside the cell and between adjacent cells, and establish a beam interference model for mobile users in the cell;

[0036] In the millimeter wave band, path loss, angle extension, beamforming technology and other issues should be considered comprehensively during the modeling process. The base station adopts the Butler matrix method to generate fixed beams and point directly to corresponding users. Using Massive MIMO technology, base station antennas generate hundreds of beams and establish communication links with users in the cell. It is set that one beam of the base station antenna can only be allocated to one user, and a certain user has one and only one beam corresponding to it.

[0037] In the millime...

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Abstract

The invention provides a Massive MIMO multi-cell cooperative beam distribution method under a millimeter wave, and belongs to the field of communication. In order to solve the problem of cell thickening and inter-cell interference during antenna beam forming and beam selection. The method comprises the following steps: a first step, with single cell multiplexing as foundation, considering the interference relation of beams in the cells and between adjacent cells, establishing a beam interference model of mobile users in the cells; a second step, calculating total augmentation rates of the cells according to the established beam interference model of the mobile users in the cells, and obtaining an augmentation target function according to the total augmentation rates of the cells; and a third step, using an improved chaos search algorithm to solve 0-1 integer optimization problem of the obtained augmentation target function to obtain an optimal solution and an optimal beam allocation result of the cells in the established model. The massive MIMO multi-cell cooperative beam distribution method provided by the invention can be used for selecting beams in combination the cooperation of multiple base stations in a millimeter wave Massive MIMO scene to realize the optimal performance and greatly reduce the operation complexity.

Description

technical field [0001] The invention relates to a beam selection and allocation strategy using MassiveMIMO multi-cell cooperation in the millimeter wave band, and belongs to the communication field. Background technique [0002] Massive MIMO, millimeter wave and beamforming technologies are the key technologies of 5G. In the MassiveMIMO scenario, the base station is configured with a large-scale antenna array, and each terminal is configured with a limited number of antennas. Since the electromagnetic wave loss in the millimeter wave band is far greater than the frequency band around 2 GHz commonly used in cellular networks, the base station needs to use Massive MIMO technology to generate high-gain beams to compensate for the large communication link loss in the millimeter wave band. In addition, in order to further improve the aggregate throughput of the entire network, the layout of cell base stations in the 5G system will be denser. To sum up, Massive MIMO, millimeter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/28H04W72/04
CPCH04W16/28H04W72/046
Inventor 张文彬杨晓鹤刘曦王奔王晨郝瑞林程君会
Owner HARBIN INST OF TECH
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