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Downlink interference collaboration method and base station

An interference coordination and base station technology, applied in the field of communication, can solve problems such as unsatisfactory inter-cell interference processing effect, achieve the effects of rationally distinguishing users by power, reducing co-frequency interference, and improving communication quality

Inactive Publication Date: 2009-04-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, it is unreasonable to distinguish the interference coordination method for the users in the cell according to the power frequency bands of the edge users and the central users, so that the existing interference coordination scheme is not ideal for dealing with inter-cell interference

Method used

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  • Downlink interference collaboration method and base station
  • Downlink interference collaboration method and base station
  • Downlink interference collaboration method and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. A downlink interference coordination method, the flow chart of which is as follows figure 1 shown, including:

[0024] A1, identifying high-power users in the current cell;

[0025] In the embodiment of the present invention, identifying high-power users in the current cell can be achieved in the following ways:

[0026] The base station obtains a preset power threshold;

[0027] Judging whether the power allocated to the user is higher than the preset power threshold, and if so, confirming that the user is a high-power user.

[0028] It can be understood that the power threshold can be preset, and the specific threshold can be set in consideration of factors such as cell capacity, geographical characteristics, and power settings of adjacent cells, and the specific threshold does not constitute a limitation of the present invention.

[0029] A2. Obtain a high-power frequency band used by high-power users in adjacent cells of the current cell;

[0030] ...

Embodiment 2

[0066] Embodiment 2, a downlink interference coordination method, the flow chart is as follows figure 2 shown, including:

[0067] B1, the base station distinguishes high-power users and low-power users in the cell; the specific distinction is based on a power threshold, which will not be described here.

[0068] B2, the base station judges whether to trigger the event of increasing the high power frequency band; if yes, proceed to step B3; if not, proceed to step B4;

[0069] Since the high-power frequency band is limited, the scheduler counts the total number of frequency bands used by the high-power users scheduled on the low-power frequency band during each scheduling. If the total number exceeds a certain threshold (system bandwidth × A%) ), which triggers an increase in high power band event. Referring to the analysis in Embodiment 1 above, if the total number of frequency bands used by high-power users scheduled on the low-power frequency band exceeds a certain thres...

Embodiment 3

[0084] Embodiment 3, a base station, the structural diagram is as follows image 3 As shown, it includes: a user distinguishing unit 310, a frequency band information obtaining unit 320 and a frequency band setting unit 330;

[0085] A user distinguishing unit 310, configured to identify high-power users in the current cell;

[0086] A frequency band information obtaining unit 320, configured to obtain a high-power frequency band used by high-power users in neighboring cells of the current cell;

[0087] The frequency band setting unit 330 is configured to set a high power frequency band for the high power user in the current cell; the high power frequency band set by the high power user in the current cell is different from the high power frequency band used by the high power user in the adjacent cell Frequency bands are differentiated to minimize inter-cell interference.

[0088] further reference Figure 4 , is a schematic structural diagram of a fourth base station acco...

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Abstract

The invention discloses a downlink interference coordination method and a base station. In the embodiment of the invention, the interference among cells is minimized and the interference coordination between the cells is realized by the following steps: identifying a high power user in a current cell; acquiring a high power frequency band used by the high power user in the cell neighboring to the current cell; and setting the high power frequency band for the high power user in the current cell, wherein, the high power frequency band set for the high power user in the current cell is different from the high power frequency band used by the high power user in the neighbor cell. Compared with the prior art in which the users are differentiated according to geographic positions of the users, the method is more reasonable due to differentiation of the users according to the power, and the method helps realize allocation of the used frequency bands of the high power users, reduce the interference among the cells and improve the communication quality by the coordination among the cells.

Description

technical field [0001] The invention relates to the technical field of communication, and in particular to a downlink interference coordination method and a base station. Background technique [0002] How to improve the throughput of cell-edge users is one of the challenges that the next-generation mobile communication system will face. The distance between cell-edge users and the base station is relatively long, and the signal energy has experienced relatively large attenuation. The useful signal strength reaching edge users is relatively large. At the same time, because different cells of the Orthogonal Frequency Division Multiplexing (OFDM) system use the same frequency to transmit, the interference of other cells between cells to edge users is relatively large, resulting in the average signal-to-interference-plus-noise ratio ( Signal to Interference plus Noise Ratio, SINR) is relatively small. Therefore, inter-cell co-channel interference is one of the main factors that...

Claims

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Application Information

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IPC IPC(8): H04W40/08H04W88/08
CPCY02D30/70
Inventor 张志华钱颖冯忻
Owner HUAWEI TECH CO LTD
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