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Multi-cell beam forming method and multi-cell beam forming device

A multi-cell, beam technology, applied in the direction of location diversity, diversity/multi-antenna system, space transmit diversity, etc., can solve the problems of performance limitation and user beam selection influence

Active Publication Date: 2016-04-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) Due to the introduction of low-power nodes, a large number of edge users are generated. The existing beam selection methods are all based on the assumption of homogeneous cells. The beam selection of has a greater influence;
[0010] (2) The low-power nodes introduced in the heterogeneous network adopt multi-antenna technology. For dense heterogeneous networks, the performance of existing methods is limited by the degree of freedom

Method used

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Embodiment 1

[0054] An embodiment of the present invention provides a multi-cell beamforming method, such as figure 1 shown, including:

[0055] Step S101: Calculate the beamforming vector b of each coordinated cell in the heterogeneous network based on the principle of maximizing the signal strength of the scheduled user in the coordinated cell and minimizing the weighted interference leakage from the scheduled user in the coordinated cell to the scheduled users in other coordinated cells q ;

[0056] In this embodiment, considering that the calculation beamforming vectors of heterogeneous networks are divided into two types: distributed and centralized structures, so in the present invention, the subjects of calculating beamforming vectors of heterogeneous networks with different structures are different to adapt to each structure, Expressed as:

[0057] For the centralized heterogeneous network beamforming vector calculation, the preset central node calculates the beamforming vector b...

Embodiment 2

[0155] An embodiment of the present invention provides a multi-cell beamforming device, such as Image 6 shown, including:

[0156] The calculation module 610 is used to calculate the beamforming vector b of the coordinated cell in the heterogeneous network based on the principle of maximizing the signal strength of the scheduled user of the coordinated cell and minimizing the weighted interference leakage of the scheduled user of the coordinated cell to the scheduled user of other coordinated cells q ;

[0157] An update module 620, configured to update the beamforming vector b of the corresponding coordinated cell based on the calculation result of the calculation module q , so that the corresponding coordinated cell according to the updated beamforming vector b q The corresponding scheduled user transmits data.

[0158] Preferably, the calculation module 610 specifically includes:

[0159] An information collection unit 611, configured to collect measurement data collec...

Embodiment 3

[0169] An embodiment of the present invention provides a coordinated base station covering one or more coordinated cells in a heterogeneous network system, and the coordinated base station includes the multi-cell beamforming device described in Embodiment 2.

[0170] Further, when the heterogeneous network system is a centralized system, the cooperative base station not selected as the central node turns off the function of its own multi-cell beamforming device; the cooperative base station selected as the central node enables the multi-cell beamforming device , and calculate the beamforming vectors of each cooperative cell in the heterogeneous network system one by one;

[0171] When the heterogeneous network system is a distributed system, all cooperative base stations enable their own multi-cell beamforming devices, and each cooperative base station calculates the beamforming vector of the corresponding cooperative cell one by one, and calculates the corresponding beamformin...

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Abstract

The invention discloses a multi-cell beam forming method and a multi-cell beam forming device. The method comprises steps: with a principle of maximizing the signal intensity of a cooperative cell scheduling user and minimizing weighted interference leakage on other cooperative cell scheduling users by the cooperative cell scheduling user, a beam forming vector bq for each cooperative cell in a heterogeneous network is calculated; and based on the calculation result, a beam forming vector bq for the corresponding cooperative cell is updated to enable each cooperative cell to transmit data according to the updated beam forming vector bq and the corresponding scheduling user. The method of the invention is used for calculating and acquiring the beam forming vector for data transmission, the best balance between the system performance and the interference avoidance is achieved, effectiveness of interference management is improved, and the system capacity of a low-power node is further improved.

Description

technical field [0001] The present invention relates to the technical field of digital communication, in particular to a multi-cell beamforming method and device. Background technique [0002] Because the heterogeneous network can optimize the system performance by improving the topology of the network, it has become one of the research hotspots in mobile communication. The heterogeneous network consists of a network-planned high-power macro base station and low-power nodes with independent placement characteristics under its coverage. The low-power nodes include home base stations, picocells, and relay stations, etc., which can achieve hotspot area coverage and community services. splitting, so as to obtain cell splitting gain. Due to the different power and coverage of different types of base stations in heterogeneous networks, and the independent placement of low-power nodes, the interference of control channels and service channels of different base stations is very pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617H04L5/0073H04B7/024Y02D30/70H04W72/541H04B7/0634H04W84/045
Inventor 王绍鹏秦洪峰
Owner ZTE CORP
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