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A downlink sinr estimation method and base station

A base station and calculated technology, applied in the field of communication, can solve the problem of inaccurate SINR estimation

Active Publication Date: 2017-04-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned CRS and CSI-RS do not use beamforming weighted transmission, because beamforming weighted transmission generally has array gain, that is, the actual downlink SINR during transmission will be higher than the downlink SINR estimated by the terminal
It can be seen that the current downlink SINR estimation is not accurate enough

Method used

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  • A downlink sinr estimation method and base station
  • A downlink sinr estimation method and base station
  • A downlink sinr estimation method and base station

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0051] figure 1 is a schematic flowchart of a downlink SINR estimation method provided by an embodiment of the present invention, as shown in figure 1 shown, including the following steps:

[0052] 101. Acquire a CQI sent by a target user equipment, and calculate and obtain a first downlink SINR of the target user equipment according to the CQI.

[0053] Specifically, a request message for requesting to return the CQI may be sent to the target user equipment firs...

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Abstract

Disclosed is a downlink SINR estimation method, comprising: acquiring a CQI sent by a target user equipment, and according to the CQI, performing conversion to obtain a first downlink SINR of the target user equipment; calculating a downlink channel matrix of the target user equipment; and based on the downlink channel matrix, the first downlink SINR and pre-acquired beamforming weighting transmitting data, calculating a second downlink SINR of the target user equipment. Accordingly, also disclosed is a base station. The embodiments of the present invention can improve the accuracy of downlink SINR estimation.

Description

technical field [0001] The present invention relates to the communication field, in particular to a downlink Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR) estimation method and a base station. Background technique [0002] At present, in the Long Term Evolution (LTE) system, the terminal usually feeds back the Channel Quality Indicator (CQI) to the base station, and the base station then confirms the modulation and coding scheme (Modulation And Coding Scheme, MCS) used according to the CQI. ). Among them, the process for the terminal to obtain the CQI is as follows: [0003] The terminal estimates the downlink signal to interference plus noise ratio (Signal to Interference and Noise Ratio, SINR) based on the common reference signal (Common Reference Signal, CRS) or channel state indication reference signal (Channel State Indication RS, CSI-RS); [0004] The terminal quantizes the downlink SINR to obtain the above CQI. [0005] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/336H04W88/08
CPCH04B17/336
Inventor 易雄书
Owner HUAWEI TECH CO LTD