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Methods for reducing interference in a wireless communication system

A communication system and interference level technology, applied in wireless communication, radio transmission system, diversity/multi-antenna system, etc., can solve problems such as low spectrum efficiency and small frequency reuse coefficient

Active Publication Date: 2012-10-31
ALCATEL LUCENT SAS
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  • Abstract
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Problems solved by technology

Although FFR mitigates interference, FFR also leads to lower spectral efficiency due to small frequency reuse factor

Method used

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  • Methods for reducing interference in a wireless communication system
  • Methods for reducing interference in a wireless communication system
  • Methods for reducing interference in a wireless communication system

Examples

Experimental program
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Embodiment Construction

[0020] Various exemplary embodiments will now be described more fully with reference to the accompanying drawings in which some exemplary embodiments are illustrated. In the drawings, the thickness of layers or regions may be exaggerated for clarity.

[0021] Therefore, although the exemplary embodiments are capable of various modifications and alternative forms, the embodiments are shown by way of example in the drawings and will be described herein in detail. It should be understood, however, that there is no intention to limit example embodiments to the particular forms disclosed, but on the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the claims. In the description of the figures, the same reference numerals designate similar elements.

[0022] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by ...

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Abstract

Example embodiments are directed to methods of reducing interference in a wireless communication system. In at least one example embodiment, a method includes first determining (S360), by a first transmitter having a multi - directional antenna configured to produce a plurality of beams, at least one interference level of at least one interfering beam of a plurality of beams of at least one transmitter in the communication system, second determining (S340) a transmitting beam pattern based on the interference level, the transmitting beam pattern indicating a sequence of illuminating the plurality of beams at corresponding time slots, third determining (S345) a fractional frequency reuse pattern based on the transmitting beam pattern, and transmitting data (S350) based on the transmitting beam pattern and the frequency reuse pattern.

Description

[0001] priority statement [0002] This application claims the benefit of US Provisional Application No. 61 / 299,195, filed January 28, 2010, which is hereby incorporated by reference in its entirety. Background technique [0003] Due to the heavily scattered environment of wireless channels in indoor high data rate wireless systems, the reduced cell size and the distance between adjacent base stations (BSs), different transmitter-receiver pairs may strongly interfere with each other. This strong interference can severely limit the performance of the wireless system. [0004] In environments with a lot of scattering, such as outdoor-to-indoor or indoor environments, it is more difficult to resolve wireless interference. The difficulty is caused by scattering and reflections of the transmitted signal in multiple directions, which in turn can increase interference and severely degrade the performance (eg, spectral efficiency, system / user throughput) of the wireless system. Fra...

Claims

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Application Information

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IPC IPC(8): H04W72/08H04B7/04H04W16/30H04W72/04
CPCH04W72/082H04B7/0408H04W16/28H04W16/30H04W72/046H04W72/541H04W16/02
Inventor 杨凯C-B·蔡D·卡林D·鲁费S·伊尤
Owner ALCATEL LUCENT SAS
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