Method for coordinating interference among cells, base station equipment and communication system

A technology of inter-cell interference and base station equipment, applied in the field of communication, can solve problems such as serious ICI problems, and achieve the effect of improving performance gain and reducing delay

Inactive Publication Date: 2011-05-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has become the core technology of the broadband mobile communication 3GPP LTE standard, and it solves intra-cell interference better than CDMA (Code Division Multiple Access, Code Division Multiple Access) technology The problem, but as a price, the ICI problem brought by the OFDM system is more serious than that of the CDMA system

Method used

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  • Method for coordinating interference among cells, base station equipment and communication system
  • Method for coordinating interference among cells, base station equipment and communication system
  • Method for coordinating interference among cells, base station equipment and communication system

Examples

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Effect test

Embodiment 1

[0045] Taking a cell with 6 neighboring cells as an example, the implementation of the inter-cell interference coordination method provided by the present invention will be further described in detail below. like image 3 As shown, cell 1 is the serving cell, and cells 2, 3, 4, 5, 6, and 7 are neighboring cells of 1. UE moves from the edge of serving cell 1 to the center of serving cell 1. See the cell topology and UE trajectory image 3 .

[0046] The method for inter-cell interference coordination in Embodiment 1 includes:

[0047] The frequency band resources are allocated on the eNodeB side; when the UE is a CCU, the UE can only use the frequency band resources that can be used by users in the center of the cell during scheduling; if it is a CEU, it can only use the frequency band resources that can be used by users at the edge of the cell during scheduling frequency band resources. for image 3 In the shown cell, all frequency band resources are equally divided into 4...

Embodiment 2

[0069] Taking a cell with only one neighboring cell as an example, the implementation of the inter-cell interference coordination method provided by the present invention will be further described in detail below. like Figure 4 As shown, cell 1 is the serving cell and cell 2 is the neighboring cell of 1. The UE moves from the center of the serving cell 1 to the edge of the serving cell. See the cell topology and UE trajectory Figure 4 .

[0070] The method for inter-cell interference coordination in Embodiment 2 includes:

[0071] The frequency band resources are first allocated on the eNodeB side. for Figure 4 In the shown cell, all frequency band resources are equally divided into three parts (f1, f2, f3), and the centers of cells 1 and 2 use the same frequency band resource, that is, part of frequency band f1. However, edge users in cell 1 can only use frequency band f3, and edge users in cell 2 can only use frequency band resource f2.

[0072] Determine whether the...

Embodiment 3

[0084] The implementation of the inter-cell interference coordination method provided by the present invention will be further described in detail below by taking the case where a serving cell has no neighboring cells as an example. For details on the cell topology and UE trajectory, see Figure 5 .

[0085] The frequency band resources are first allocated on the eNodeB side. for Figure 5 In the shown cell, all the frequency band resources are equally divided into two parts (f1, f2), the center of the cell uses the part of the frequency band f1, and the edge users of the cell can only use the part of the frequency band of the area f2.

[0086] The CCU can use the unused frequency band resources at the edge of the cell; and since the cell has no neighbor cells, the UE in the cell cannot cause interference to other neighbor cells, and the UE can also use the resources allocated to the user CEU at the edge of the cell, that is, Use the entire system bandwidth resource.

[00...

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Abstract

The invention provides a method for coordinating interference among cells, base station equipment and a communication system. The communication system comprises a plurality of pieces of base station equipment; the base station equipment is used for determining a user type according to neighbor cell list information reported in real time by a user and distribute corresponding frequency band resources to the user according to the user type and the stored resource information for dividing different frequency band resources for different user types. The invention distributes the frequency band resources in the cells on the basis of correctly distinguishing the user into a cell edge user and a central user so as to reduce the interference of the cell edge user on a neighbor cell as far as possible, thereby optimizing the performance of the edges of the cells.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for coordinating interference between cells in an LTE system, base station equipment and a communication system. Background technique [0002] ICI (Inter-Cell Interference, inter-cell interference) is an inherent problem in cellular mobile communication systems, and the traditional solution is to use frequency reuse. The future broadband mobile communication system LTE (Long Term Evolution, Long Term Evolution) has high requirements on spectrum efficiency, so it is hoped that the spectrum reuse factor will be as close as possible to 1. OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has become the core technology of the broadband mobile communication 3GPP LTE standard, and it solves intra-cell interference better than CDMA (Code Division Multiple Access, Code Division Multiple Access) technology However, as a price, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W72/12
Inventor 刘献玲徐云翔
Owner ZTE CORP
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