A method, communication device and system for updating the time of reporting channel state information

Abstract

Disclosed is a method for updating a moment of reporting channel state information. The method comprises: determining a first reporting moment of first channel state information and a first reference resource corresponding to the first channel state information; and when a moment where the first reference resource is located satisfies a pre-set condition, updating a reporting moment of the first channel state information from the first reporting moment to be a second reporting moment, wherein the pre-set condition is that a time range between the moment where the first reference resource is located and the first reporting moment is greater than or equal to a time threshold value, a reference resource different from the first reference resource exists between the first reporting moment and the second reporting moment, and a time range between the first reporting moment and the second reporting moment is less than the time threshold value. Also provided are a communication device and system. By means of the embodiments of the present invention, data transmission reliability and data transmission efficiency can be ensured.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for updating the time of reporting channel state information, a communication device and a system. Background technique [0002] Spectrum is the basis of wireless communication. According to the latest white paper on international spectrum issued by the Federal Communications Commission (FCC), license-free frequency band (also known as unlicensed (unlicensed) spectrum) resources are greater than licensed frequency band (authorized spectrum) resources, so , applying long term evolution (long termevolution, LTE) user equipment (User Equipment, UE) in a license-free frequency band, for example, a license-assisted access long term evolution (Licensed-Assisted Access Using Long Term Evolution, LAA-LTE) system, not only can Effective use of license-free frequency bands can also provide more efficient wireless access and meet the growing demand for mobile broadba...

AI Technical Summary

Problems solved by technology

[0005] For the CSI reported periodically (including Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI) and Rank Indicator (RI)), since the data transmission in the license-exempt frequency band is an opportunity Specifically, taking RI as an example, there may be a situation where the time where the reference resource of RI is located is far from the time when RI is reported. In this case, if RI is reported at the time when RI is reported, the reported channel state information reflects The channel state conditions may be quite different from the current channel state conditions experienced by the UE, thereby affecting the reliability and efficiency of data transmission between the base station and the UE

Furthermore, under the existing LTE system, since the UE will use this RI as the premise for subsequent wideband CQI / PMI and narrowband CQI / PMI calculations, it will also lead to a series of inaccurate CSI information reporting, which will further affect the base station and UE Data transmission reliability and data transmission efficiency between

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