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Method for reducing interference in the downlink direction of a cellular radio communication network and corresponding base station

A downlink and base station technology, applied in the field of reducing interference in the downlink direction and corresponding base stations, and can solve problems such as complex interference

Inactive Publication Date: 2012-11-21
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Compared with frequency reuse 3, the advantage of frequency reuse 1 scheme is that it can achieve higher spectral efficiency and its disadvantage is the high and complex interference generated by users or base stations using the same resource at the same time

Method used

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  • Method for reducing interference in the downlink direction of a cellular radio communication network and corresponding base station
  • Method for reducing interference in the downlink direction of a cellular radio communication network and corresponding base station
  • Method for reducing interference in the downlink direction of a cellular radio communication network and corresponding base station

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Experimental program
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Embodiment Construction

[0027] figure 1 Shown are different power levels on frequency subcarriers of a frame received by an end user according to the invention.

[0028] figure 1 is a representation of the signal power in the time domain on a frequency subcarrier used in a multi-carrier cellular wireless communication network. As will be appreciated by those skilled in the art, signals belonging to one user are carried on several subcarriers, so that different subcarriers carrying signals containing data destined for one user will have a similar power distribution to the indicated frequency subcarriers. However the rest of the power level of the signal will depend on the users scheduled on these subcarriers.

[0029] The part 11 of the signal on the subcarriers consists of the preamble, which shows the power level P 前导码 .

[0030] Portion 12 of the signal preferably includes a broadcast message addressed to all terminals showing the power level P 广播 . Such a portion 12 is not necessary within...

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Abstract

The present invention relates to a method for reducing interference in the downlink direction of a cellular radio communication system comprising base stations communicating with terminals using a frame structure showing a time and frequency extension, the frame comprising a preamble portion and at least one data portion, the terminals being adapted to receive frames for which the receive power of the at least one data portion is varying in a predefined range relative to the receive preamble power of the preamble portion, According to the present invention, the method comprises the steps of: transmitting the part of the data portion destined to the terminal with a transmit power adopted to generate a first receive power (Plow) at the terminal within the range if said terminal belongs to a first group of terminals; transmitting the part of the data portion destined to the terminal with a transmit power adapted to generate a second receive power (Phigh) at the terminal within the range, the second receive power being higher than the first receive power, If the terminal belongs to a second group of terminals.

Description

[0001] Cross References to Related Applications [0002] The present invention is based on priority application EP 08 305474.2, which is hereby incorporated by reference. technical field [0003] The invention relates to a method for reducing interference in a cellular radio communication system in which the frame structure has a time and frequency extension. Background technique [0004] A network based on Orthogonal Frequency Division Multiplexing (OFDM) is an example of such a cellular wireless communication network having a frame structure with time and frequency extensions. These networks use multi-carrier transmission technology and are expected to be used as access technologies in fourth generation wireless / mobile communication networks due to their ability to combine especially with MIMO / beamforming antenna technology to achieve very high bit rates. OFDM offers a practical option for high-speed mobile applications and thus represents an important step in the next g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W72/12H04L27/26H04W72/54
CPCH04W72/082H04W16/10H04W52/346H04W72/541H04W52/243H04W52/42
Inventor B·策扎尔H·哈尔鲍尔M·多尔R·费切尔B·格洛斯O·施坦策J·奥特巴赫
Owner ALCATEL LUCENT SAS