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Method, device and base station for downlink beam forming

A beamforming and base station technology, applied in the field of downlink beamforming, can solve problems such as no judgment, achieve large gain and improve system throughput

Active Publication Date: 2014-11-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there is no way to determine the target of beamforming, that is, which users to perform beamforming on

Method used

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  • Method, device and base station for downlink beam forming
  • Method, device and base station for downlink beam forming
  • Method, device and base station for downlink beam forming

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Embodiment Construction

[0036] The beamforming technology described in the present invention is a multi-antenna technology for performing downlink beamforming through uplink channel estimation, so beamforming can only be performed depending on uplink resources and channel conditions. However, resources for uplink weight estimation are limited. If all users use downlink beamforming, most of the uplink bandwidth will be occupied. In order to save uplink bandwidth, it is necessary to select users for beamforming.

[0037] Carrier to Interference plus Noise Ratio (CINR for short) is a measure of signal effectiveness expressed in decibels (dBs). The carrier is the valid signal and the interference can be noise or co-channel interference or both. In order for the receiver of the signal to be able to decode the signal, the signal must fall within an acceptable CINR range, which is related to the technology used (for example: CDMA, GSM or Wimax, etc.). CINR is usually used to determine the current downlink ...

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Abstract

Provided are a method, a device and a base station for downlink beam-forming, which can save uplink bandwidth and improve throughput of a system. The method comprises: sorting out terminals of a first kind from a first list, wherein the terminals of the first kind meet the following conditions: the downlink CINR is greater than a BF exit threshold and the BF gain of the terminal is less than a preset threshold; the first list is used for recording identification information about the terminals which enable BF currently; recovering the uplink weighted estimation resource of the terminals of the first kind, disabling downlink BF of the terminals of the first kind, and deleting the terminals of the first kind from the first list; selecting terminals of a second kind from a second list, wherein the terminals of the second kind meet the following conditions: the terminal does not belong to the first list and the downlink CINR thereof is less than a BF entrance threshold; the second list is used for recording identification information about terminals with BF ability; allocating uplink weighted estimation resource to the terminals of the second kind, enabling the downlink BF, and adding the terminals of the second kind into the first list. The device includes a first sorting module, a second sorting module, a BF disabling module and a BF enabling module.

Description

technical field [0001] The present invention relates to beam-forming (Beam-forming, BF for short) technology, in particular to a downlink beam-forming method, device and base station. Background technique [0002] With the wide popularization of wireless communication and the application of various types of data services in wireless communication systems, the need for high-speed transmission of data services makes the spectrum utilization rate of wireless systems the most critical performance index. Beam-Forming is a multi-antenna transmission technology applied to small-pitch antenna arrays. Its main principle is to use the strong correlation of spatial channels and the principle of wave interference to generate a strong directional radiation pattern, so that the radiation The main lobe of the pattern is adaptively directed to the user's incoming wave direction, thereby improving the signal-to-noise ratio and improving system capacity or coverage. Beamforming is equivalent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04W16/28H04W72/04
CPCH04B7/0617
Inventor 刘敏刘广
Owner ZTE CORP