Multi-TRP CSI Reporting Using Priority-Based Coefficient Ordering
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Solution Overview
Problem
Existing communication systems lack an effective channel state information (CSI) reporting mechanism for multi-TRP coherent joint transmission scenarios, leading to performance losses in FDD systems.
Innovation Solution
Introduce a reference signal resource dimension (TRP dimension) for CSI reporting, enabling UEs to report joint downlink CSI of multiple TRPs, with priority functions to determine the reporting sequence of coefficients, ensuring important information is prioritized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a UE reports joint downlink CSI of multiple TRPs in a multi-TRP coherent joint transmission scenario, then the system can achieve improved throughput performance and user experience, but there is no effective CSI reporting mechanism available in current protocols leading to performance losses
Solution Approach 1:
The patent introduces a new dimension for CSI reporting by extending the existing single-TRP reporting mechanism to support multi-TRP scenarios. Specifically, it adds a TRP dimension to the CSI report structure, allowing UEs to report joint downlink CSI across multiple TRPs by incorporating additional reference signal resource indicators and coefficient information corresponding to multiple TRPs, thereby enabling effective CSI reporting in multi-TRP coherent joint transmission without requiring complete protocol redesign
Solution Approach 2:
The patent enhances the existing CSI reporting mechanism to serve multiple functions: it maintains compatibility with single-TRP reporting while simultaneously supporting multi-TRP coherent joint transmission. The improved mechanism can adaptively function in both single-TRP and multi-TRP scenarios, providing universal applicability across different transmission modes through configurable reporting parameters and flexible interpretation of CSI report contents
2Measurement precision
If multiple coefficients corresponding to different TRPs are reported, then accurate joint CSI can be obtained, but determining the reporting sequence of coefficients from different TRPs becomes complex without a priority function
Solution Approach 1:
The patent applies parameter changes by introducing a priority function that assigns priority values to coefficients based on their association with different TRPs. This priority function transforms the complex sequencing problem into a parameter-based ordering system where coefficients are reported in descending order of their priority values, which are determined by factors such as TRP importance, channel conditions, and transmission requirements, thereby simplifying the reporting sequence determination while maintaining CSI accuracy
Data Source
AI summary
This application relates to the field of communication technologies, and in particular, to a channel state information reporting method, an apparatus, and a readable storage medium. The method includes: determining indication information of M coefficients based on reference signals on N reference signal resources, where priorities of the M coefficients are determined based on priorities of the N reference signal resources, and the M coefficients are used to determine a precoding matrix; and sending first information, where the first information includes indication information of K coefficients, and the K coefficients are determined from the M coefficients based on the priorities of the M coefficients. It is ensured as much as possible that more important information can be preferentially reported, to reduce a performance loss of a communication system.