Method and device for adjusting three dimensional (3D) multiple-input-multiple-output (MIMO) downward inclination angles and base station

A technology of 3DMIMO and adjustment method, which is applied in space transmit diversity, electrical components, diversity/multi-antenna systems, etc., can solve the problems of high system complexity, achieve the effects of reducing system complexity, improving user performance, and reducing the number of adjustments

Active Publication Date: 2013-06-26
CHINA MOBILE COMM GRP CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present invention provide a 3D MIMO downtilt adjustment method, device, and base station, which are used to solve the problem of high system complexity in order to enhance the performance of cell center and edge users in the application of existing 3D MIMO technology

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  • Method and device for adjusting three dimensional (3D) multiple-input-multiple-output (MIMO) downward inclination angles and base station
  • Method and device for adjusting three dimensional (3D) multiple-input-multiple-output (MIMO) downward inclination angles and base station
  • Method and device for adjusting three dimensional (3D) multiple-input-multiple-output (MIMO) downward inclination angles and base station

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Embodiment 1

[0028] Embodiment 1 of the present invention provides a method for adjusting a 3D MIMO downtilt angle. The steps of the method are as follows: Figure 4 shown, including:

[0029] Step 101. Determine the location of each user in the cell covered by the base station.

[0030] Specifically, the location information reported by each user may be received, so as to determine the location of each user.

[0031] Step 102, perform grouping.

[0032] This step includes, according to the determined location of each user, dividing the user into at least two user groups.

[0033] Preferably, when the downtilt angle is fixed, the distance between the position where the main lobe of the vertical antenna points and the base station can be used as a threshold to group users. Specifically, the first distance between the position where the main lobe of the vertical antenna points and the base station can be determined when the downtilt angle is fixed, and the second distance between each use...

Embodiment 2

[0049] Embodiment 21 of the present invention provides a method for adjusting a 3D MIMO downtilt angle. The steps of the method are as follows: Figure 5 shown, including:

[0050] Step 201. Determine the location of each user.

[0051] Specifically, the location information of the user can be obtained according to the feedback information of each user in the cell covered by the base station. For the convenience of description, (UE index，i , UE index，j) records the location information of the user, where index=1, 2, . . . n, i is the abscissa of the location information of the user index, and j is the ordinate of the location information of the user index.

[0052] Step 202. Determine the distance between each user and the base station.

[0053] In this step, the distance between the user and the base station (that is, the second distance) can be calculated according to the obtained user location information, and the users can be sorted according to the distance. For each u...

Embodiment 3

[0065] Embodiment 3 of the present invention provides a 3D MIMO downtilt adjustment device, the structure of which is shown in Figure 7, including:

[0066] The position determination unit 11 is used to determine the position of each user in the base station coverage cell; the grouping unit 12 is used to divide the user into at least two user groups according to the determined position of each user; the downtilt angle determination unit 13 is used for determining, for each user group, the corresponding downtilt angle of the user group.

[0067] The grouping unit 12 is specifically configured to determine the first distance between the position where the main lobe of the vertical antenna points to and the base station when the downtilt angle is fixed, and divide users whose second distance from the base station is greater than the first distance into The first user group divides users whose second distance from the base station is not greater than the first distance into the se...

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Abstract

An embodiment of the invention provides a method and a device for adjusting 3D MIMO downward inclination angles and a base station. The method comprises the steps of dividing users into a plurality of user groups according to positions of users within an area covered by the base station and determining the antenna downward inclination angle corresponding to each of the user groups respectively for all user groups, thus, dynamic adjustment of antenna downward inclination angles in a cell can be achieved, at the same time when the cell user performance is improved, compared with respective determination of the antenna downward inclination angle for each of the users, the method has the advantages that the number of times for adjustment is reduced, and the system complexity can be reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a three-dimensional multiple-input multiple-output (3D MIMO, 3 Dimensions Multiple-Input-Multiple-Output) downtilt adjustment method, device and base station. Background technique [0002] In the Long Term Evolution (LTE, Long Term Evolution) system, in order to limit the signal within the coverage of its own cell and reduce the interference to other cells with the same frequency, it is very effective to tilt the beam pattern of the directional antenna downward at a certain angle. method. This technology will increase the system capacity no matter for macro cell or micro cell environment. A reasonable setting of the downtilt angle can not only greatly improve the quality and capacity of the system, but also enable the base station to play a better role, thereby providing better services for wireless users. This technology has become a part of future communication s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W64/00H04W88/08
Inventor 杨春霞叶贤洪张忠培
Owner CHINA MOBILE COMM GRP CO LTD
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