Massive MIMO multi-cell cooperative beam allocation method under millimeter wave
A multi-cell cooperation and allocation method technology, 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 the average search time
Active Publication Date: 2019-03-12
HARBIN INST OF TECH
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[0003] The purpose of the present invention is to solve the current problems of cell densification and inter-cell interference in multi-cell cooperation during antenna beamforming and beam selection. The present invention provides a Massive MIMO multi-cell cooperative beam allocation method under millimeter waves
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[0034] combine figure 1 This embodiment is described. The Massive MIMO multi-cell coordinated beam allocation method under millimeter wave described in this embodiment,
[0035] Step 1: On the basis of single-cell reuse, considering the interference relationship between beams within the cell and between adjacent cells, establish a beam interference model for mobile users in the cell;
[0036] In the millimeter-wave band, issues such as path loss, angle expansion, and beamforming technology should be comprehensively considered in the modeling process. The base station uses the Butler matrix method to generate fixed beams that directly point to the corresponding users. Using Massive MIMO technology, the base station antenna generates hundreds or thousands of beams to 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.
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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 strategy for beam selection and allocation using Massive MIMO multi-cell cooperation in the millimeter wave band, and belongs to the field of communications. Background technique [0002] Massive MIMO, mmWave and beamforming technologies are key technologies for 5G. In the Massive MIMO 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 that in the frequency band near 2 GHz commonly used in cellular networks, it is necessary for the base station 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...
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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