Channel State Information Feedback via Group Selection
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Solution Overview
Problem
Current wireless communication systems face performance issues due to precoding matrices or selected beams being fed back based on strongest path information, leading to mismatched feedback and suboptimal system performance.
Innovation Solution
A method and device for feeding back channel state information by selecting and processing multiple information groups, allowing for the transmission of index and parameter information beyond the strongest path, enabling improved resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If precoding matrices or selected beams are fed back based on strongest path information, then feedback overhead is reduced, but system performance deteriorates due to mismatched feedback
Solution Approach 1:
The channel information is segmented into multiple information groups (first information group, second information group, etc.), each representing different channel characteristics or beams. Instead of selecting only the strongest path, the terminal selects multiple information groups to provide a more comprehensive channel representation, thereby improving system performance while maintaining reasonable feedback overhead.
Solution Approach 2:
The patent introduces a new dimension in feedback by selecting multiple information groups across different dimensions (e.g., different beams, different channel characteristics) rather than just selecting the single strongest path. This multi-dimensional approach enriches the feedback information without proportionally increasing overhead, resolving the contradiction between information completeness and overhead reduction.
2Quantity of substance
If only the strongest path information is used for feedback, then feedback data volume is reduced, but resource utilization deteriorates
Solution Approach 1:
The patent applies partial action by selecting N information groups where N is greater than 1 but less than or equal to M (the total number of available information groups). This selective approach provides more channel information than the single strongest path while avoiding the excessive overhead of transmitting all M groups, thereby improving resource utilization with moderate feedback data volume.
3Reliability
If multiple information groups are selected and processed, then system performance is enhanced, but feedback overhead increases
Solution Approach 1:
The patent extracts only the most essential features from multiple information groups by selecting N representative groups out of M total groups. This extraction approach provides sufficient channel information for improved system performance while limiting the feedback overhead by not transmitting all available information groups, thus resolving the contradiction between performance enhancement and overhead control.
Data Source
AI summary
The present invention provides a channel state information feedback method and device. The method includes: selecting, by a communication node, N information groups from configured M information groups; where N and M are positive integers, and N is less than or equal to M; processing, by the communication node, the selected N information groups in a preset manner to obtain index information of the N information groups and parameter information of the preset manner, wherein the index information comprises group indices of the N information groups or index of information in the N information groups; and feeding back, by the communication node, the index information and the parameter information.