CSI Feedback Partitioning for Multi-TRP Reporting Constraints
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting channel state information (CSI) feedback with multiple parameters, particularly in multi-TRP transmission scenarios, where additional reporting is required.
Innovation Solution
The method involves configuring and transmitting CSI feedback with multiple partitions, each having different omission priorities, associated with various CSI-reference signal allocations, to optimize the reporting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-TRP transmission is implemented to increase data throughput, then communication performance is improved, but the number of parameters to be reported in CSI feedback increases
Solution Approach 1:
The CSI feedback report is divided into multiple parts (first part and second part) with different omission priorities. The first part contains parameters with higher omission priority (less important parameters), while the second part contains parameters with lower omission priority (more important parameters). This segmentation allows the system to selectively drop less critical parameters when uplink resources are limited, while preserving essential CSI information for multi-TRP transmission.
2Measurement precision
If more CSI feedback parameters are reported to provide comprehensive channel state information, then network scheduling accuracy is improved, but uplink resource consumption increases
Solution Approach 1:
The system dynamically adjusts which CSI parameters are reported based on uplink resource availability and channel conditions. When uplink resources are sufficient, all CSI parameters including those for multiple TRPs are reported. When resources are limited, the network device can indicate which part of the CSI report should be dropped, allowing flexible adaptation between reporting completeness and resource consumption.
3Ease of operation
If all CSI parameters are always reported to maintain scheduling accuracy, then network device decision making is improved, but transmission overhead increases
Solution Approach 1:
Instead of always reporting all CSI parameters, the system implements partial reporting where only the most critical parameters are transmitted when resources are constrained. The CSI report is structured with prioritized parts, allowing the network to receive sufficient information for basic scheduling decisions even when full parameter sets cannot be reported due to uplink resource limitations.
Data Source
AI summary
Example embodiments of the present disclosure relate to an effective mechanism for processing the CSI reports. In this solution, the terminal device receives, from a network device, at least one configuration for channel state information (CSI) feedback; and transmitting, based on the at least one configuration, the CSI feedback to the network device, the CSI feedback comprising a plurality of partitions with different omission priorities, the plurality of partitions comprising parameters associated with one or more of a plurality of CSI-reference signal (RS) allocations. In this way, the priority rule for reporting the parameters may be updated to adaptable for the scenario where a multi-TRP is supported.