Method and equipment for acquiring channel state information

A technology for channel state information and equipment, applied in the field of communication, can solve the problems of high feedback overhead, multiple bandwidths and channel resources, occupation, etc., and achieve the effects of small feedback overhead, reducing the amount of information, and saving channel resources.

Inactive Publication Date: 2011-05-11
HUAWEI TECH CO LTD
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Problems solved by technology

[0021] The inventors have found at least the following problems in the prior art: although the channel information feedback scheme of the prior art adopts the method of differential feedback, which reduces a certain amount of air interface resource overhead, the feedback overhead is still relatively large and occupies more resources. Bandwidth and channel resources, how to obtain channel state information while saving resources becomes a problem

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  • Method and equipment for acquiring channel state information
  • Method and equipment for acquiring channel state information
  • Method and equipment for acquiring channel state information

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Embodiment Construction

[0064] 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 making creative efforts belong to the protection scope of the present invention.

[0065] In the method for obtaining channel state information provided by the embodiment of the present invention, all subband CQIs can be fed back during channel state information feedback, and a certain correspondence between wideband CQI and subband CQI can be used to calculate and find the SINR( dB) and the CQI correspondence table to obtain the wideband CQI; or the wideband CQI and most of the subband CQIs can be fed back, and then the remaining subband CQI...

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Abstract

The embodiment of the invention discloses a method and equipment for acquiring channel state information. The method comprises the following steps of: acquiring a channel quality indicators (CQI) of N sub-bands; acquiring a signal-to-interference-and-noise ratio of a sub-band corresponding to a CQI of the sub-band according to a corresponding relationship between the CQI and the signal-to-interference-and-noise ratio, wherein N is an integer of more than or equal to 2; obtaining a signal-to-interference-and-noise ratio of a wideband by utilizing the signal-to-interference-and-noise ratios of the N sub-bands, wherein the wideband consists of N sub-bands; and acquiring a CQI of the wideband corresponding to the signal-to-interference-and-noise ratio of the wideband according to the corresponding relationship between the CQI and the signal-to-interference-and-noise ratio. Due to the method, a channel information feedback party is not needed to feed back the CQI of all frequency bands, and the overhead can be saved in the process of feeding back the channel state information.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a method and equipment for acquiring channel state information. Background technique [0002] LTE (Long Term Evolution, long-term evolution) technology uses OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) to replace the long-term use of 3GPP CDMA (Code Division Multiple Access, Code Division Multiple Access) as a multiple access technology, and a large number of Using MIMO (Multiple-Input Multiple-Out-put) technology and adaptive technology to improve data rate and system performance, it can provide DL (Downlink, downlink) 100Mbit / s and UL (Uplink, Uplink) The peak rate of 50Mbit / s improves the performance of cell edge users, increases cell capacity and reduces system delay. [0003] LTE-A (LTE-Advance, evolution of LTE) is a further enhancement of the LTE technology, and the LTE-A system has a higher bandwidth requirement than t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/16
CPCH04L1/0026H04L1/0029
Inventor 张兴炜
Owner HUAWEI TECH CO LTD
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