Multiple-TRP CSI Feedback Using Segmented Report Configuration
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Solution Overview
Problem
In multiple-TRP communication systems, the increasing number of transmission and reception points leads to a larger size of CSI reports, which can overwhelm the channel state feedback procedure, necessitating improved CSI report configurations to manage the information effectively.
Innovation Solution
Employing a CSI report configuration that includes instructions for UEs to include specific quantities of layer indicator (LI) values and a strongest TRP indicator (STI) value, facilitated by report configuration messages from the base station, to optimize the channel state feedback process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs are used to improve reliability and coverage, then communication reliability is improved, but CSI report size increases which overwhelms the feedback procedure
Solution Approach 1:
The patent segments the CSI report into multiple parts: a first part containing essential CSI information for at least one TRP, and a second part containing additional CSI information for other TRPs. This segmentation allows the feedback procedure to handle large amounts of CSI data from multiple TRPs in a manageable manner, resolving the contradiction between improved reliability through multiple TRPs and the increased complexity of CSI reporting.
2Measurement precision
If all TRP CSI information is included in the report, then measurement precision is improved, but the feedback procedure becomes overwhelmed
Solution Approach 1:
The patent applies partial action by requiring the UE to include only essential CSI information in the first part of the report, while optionally including additional information in the second part. This allows the feedback procedure to maintain efficiency by processing only necessary information, while still providing complete measurement precision when needed through the optional second part.
3Measurement precision
If comprehensive CSI reporting is implemented, then channel estimation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent implements dynamics by making the CSI report configuration flexible and adaptable. The network can dynamically configure whether to include only essential CSI information or also additional information based on current communication conditions. This dynamic configuration allows the system to adjust the balance between channel estimation accuracy and processing complexity according to actual needs.
Data Source
AI summary
Apparatus, methods, and computer-readable media for facilitating CSI feedback in multiple-TRP communication are disclosed herein. An example method of wireless communication by a UE includes receiving, from a base station, a report configuration message triggering a channel state feedback procedure, the UE and the base station operating in a multiple transmission and reception point (multiple-TRP) communication mode, the report configuration message requesting a multiple-TRP transmission value including at least one of a quantity of layer indicator (LI) values and a strongest TRP indicator (STI) value. The example method also includes generating channel state information (CSI) information based on the receiving of the report configuration message, the CSI information including the multiple-TRP transmission value. The example method also includes transmitting, to the base station, a report including the generated CSI information.