CSI Feedback Prioritization Under Limited Uplink Resources
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Solution Overview
Problem
Existing CSI feedback systems face challenges in discarding part of the CSI information when uplink resources are insufficient while ensuring certain system performance.
Innovation Solution
A method and apparatus for processing CSI that allows a user equipment (UE) to discard lower-priority CSI information based on a CSI omission strategy when uplink resources are insufficient, using AI-based and legacy reporting modes to ensure efficient utilization of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complete CSI is reported using AI-based feedback compression, then feedback accuracy is improved, but uplink resource consumption increases
Solution Approach 1:
The complete CSI is divided into multiple parts with different priorities (first CSI and second CSI). The first CSI contains essential information reported in both AI-based and legacy modes, while the second CSI contains supplementary information reported only in AI-based mode. This segmentation allows the system to report complete CSI when resources are sufficient while enabling selective discarding when resources are limited.
Solution Approach 2:
The system changes the reporting parameters dynamically based on uplink resource availability. When resources are sufficient, both AI-based and legacy CSI are reported with full detail. When resources are insufficient, the system switches to reporting only the first CSI in legacy mode or selectively discarding the second CSI, thereby adapting the CSI reporting parameters to resource constraints.
2Productivity
If AI-based CSI feedback compression is used, then resource efficiency is improved, but system performance may deteriorate when resources are insufficient
Solution Approach 1:
The system prepares multiple CSI reporting strategies in advance (complete reporting with both AI and legacy modes, partial reporting with discarding, and legacy-only reporting). These pre-prepared options act as cushions to ensure that when uplink resources become insufficient, the system can smoothly switch to an alternative strategy that maintains acceptable performance rather than failing completely.
Solution Approach 2:
When uplink resources are insufficient, the system performs partial action by reporting only the first CSI and discarding the second CSI, rather than attempting to report the complete CSI which would exceed resource limits. This partial reporting maintains the most critical channel state information while accepting reduced precision, thereby balancing resource efficiency with system performance.
3Quantity of substance
If CSI is discarded when uplink resources are insufficient, then resource usage is optimized, but information loss occurs
Solution Approach 1:
The system extracts and separates the essential CSI components (first CSI) from the supplementary components (second CSI). By taking out only the necessary information for basic channel state representation, the system enables efficient resource usage while minimizing information loss. The extracted first CSI ensures that critical channel characteristics are preserved even when complete CSI cannot be reported.
Data Source
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AI summary
The present disclosure relates to the technical field of communications. Provided are a channel state information (CSI) processing method and apparatus. The CSI processing method provided in the present disclosure comprises: a user equipment (UE) receiving configuration information, which is sent by a network device, wherein the configuration information is used for configuring uplink resources; and when the uplink resources are insufficient for use in reporting all pieces of CSI, reporting a first piece of CSI among all the pieces of CSI to the network device by means of a target CSI reporting mode, wherein the target CSI reporting mode comprises an AI-based CSI reporting mode and/or a conventional CSI reporting mode, and the first piece of CSI is obtained after a second piece of CSI is discarded from all the pieces of CSI. By means of the present disclosure, when uplink resources are insufficient, part of CSI can be rationally discarded, and certain system performance can be ensured.