Channel information feedback method and communication device

DE602019070448T2Active Publication Date: 2025-05-21HUAWEI TECH CO LTD
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Patent Information

Application Number
DE602019070448
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-12-31
Publication Date
2025-05-21
Estimated Expiration
2039-12-31

AI Technical Summary

Technical Problem

In 5G communication systems, the use of massive MIMO technology leads to low system performance due to the expiration of channel state information during data transmission, especially in moving scenarios, as the channel information fed back by the terminal device becomes outdated before it is used by the network device for precoding.

Method used

A channel information feedback method that selectively feeds back either current or predicted channel information based on configured feedback modes, allowing the network device to obtain more comprehensive and accurate channel characteristics, thereby improving system performance by compensating for time-varying channels.

Benefits of technology

This method enhances data transmission performance by reducing feedback overheads and improving the accuracy of channel information, particularly in moving scenarios, by allowing the network device to use predicted channel coefficients or precoding matrix indicators, which better match the actual channel conditions during transmission.

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Abstract

This application provides a channel information feedback method and a communication apparatus. The method includes: A terminal device receives configuration information sent by a network device, where the configuration information is used to configure a feedback mode of channel information; and the terminal device feeds back current channel information to the network device when the feedback mode configured by using the configuration information is a first mode; or the terminal device feeds back predicted channel information to the network device when the feedback mode configured by using the configuration information is a second mode. Based on the method provided in this application, channel information feedback requirements in different scenarios can be met. In particular, a problem that data transmission performance deteriorates because channel information expires in a moving scenario can be resolved by feeding back the predicted channel information. This helps improve system performance.
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