Multi-TRP CSI Reporting with Priority-Based NZC Splitting
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Solution Overview
Problem
Existing techniques for reporting channel state information (CSI) are inadequate for multiple transmission-reception points (mTRP) scenarios, where a user equipment (UE) communicates with multiple TRPs, as they fail to effectively divide CSI into portions with different priority levels.
Innovation Solution
The UE divides CSI for multiple TRPs into portions based on non-zero coefficient (NZC) information, spatial domain basis information, and frequency domain basis information, using splitting rules that consider the quantity, strength, and type of TRPs, ensuring correct association with each TRP and appropriate priority levels in the CSI report.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If existing CSI reporting techniques are used for multiple TRPs, then the CSI report can be transmitted, but the CSI cannot be effectively divided into portions with different priority levels
Solution Approach 1:
The patent divides the CSI report into multiple portions (first portion and second portion) with different priority levels. The first portion contains CSI for a first set of TRPs with first priority, while the second portion contains CSI for a second set of TRPs with second priority. This segmentation allows the network to selectively process high-priority TRP information even when resource constraints exist, resolving the contradiction between maintaining information completeness and managing report structure complexity.
2Reliability
If all CSI information for multiple TRPs is included in a single report, then complete information is provided, but the network cannot prioritize certain TRPs over others
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different portions of the CSI report. Specifically, the first portion is associated with a first priority level and the second portion with a second priority level. This allows the network to selectively process and act on high-priority TRP information first, ensuring reliable communication for critical TRPs while maintaining operational ease through clear prioritization markers in the report structure.
3Adaptability or versatility
If CSI is divided into multiple portions with priority levels, then TRP prioritization is achieved, but the reporting structure becomes more complex
Solution Approach 1:
The patent segments the CSI report into distinct portions with clear priority level associations. The first portion contains non-zero coefficient information for a first set of TRPs with first priority, while the second portion contains information for a second set of TRPs with second priority. This segmentation provides the network with adaptable prioritization capability, allowing flexible handling of multiple TRPs based on their importance, while the structured division actually simplifies processing compared to handling undifferentiated mixed-priority data.
Data Source
AI summary
Methods, systems, and devices for operating a wireless device are described. A wireless device may include, according to a non-zero coefficient (NZC) splitting rule and in a first portion of a channel state information (CSI) report corresponding to a plurality of transmission-reception points (TRPs), first NZC information for a first set of TRPs, the first portion associated with a first priority level. The wireless device may include, according to the NZC splitting rule and in a second portion of the CSI report, second NZC information for a second set of TRPs, the second portion associated with a second priority level. The wireless device may include, in the CSI report and according to an additional channel state information splitting rule, additional channel state information for the plurality of TRPs.