Multi-TRP CSI Reporting With Structured Feedback Segmentation
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Solution Overview
Problem
In multi-TRP and/or multi-panel wireless communication networks, channel state information (CSI) reports are transmitted inefficiently.
Innovation Solution
Implementing methods and apparatuses for enhanced CSI reporting that include receiving and generating CSI reports based on configuration information, utilizing non-zero power CSI reference signal resources for channel measurement and zero power interference management resources, and generating reports for multiple transmission-and-reception points or panels, with specific parameters for feedback and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional CSI reporting methods are used in multi-TRP networks, then CSI feedback can be obtained, but the reporting overhead becomes excessive and efficiency deteriorates
Solution Approach 1:
The patent segments the CSI feedback into multiple components: channel measurement reports, interference measurement reports, and combined CSI reports. Each segment corresponds to specific TRPs or panels, allowing the UE to report CSI information in an organized, non-redundant manner that reduces overall overhead while maintaining completeness.
Solution Approach 2:
The patent combines multiple CSI report types into a unified feedback mechanism where the UE reports CSI for multiple TRPs/panels in a single structured message. The gNB can then process these combined reports to determine optimal transmission hypotheses, reducing the need for separate reporting cycles.
2Reliability
If detailed CSI reports for multiple TRPs are generated, then transmission performance improves, but the complexity of processing increases
Solution Approach 1:
The patent applies local quality by configuring different measurement resources and report requirements for different TRPs/panels based on their specific characteristics. The UE can focus measurement efforts on relevant TRPs and adjust report granularity locally, reducing overall processing complexity while maintaining performance for critical transmission paths.
Solution Approach 2:
The patent enables partial CSI reporting where the UE reports only the necessary CSI information for each TRP/panel combination, rather than always reporting complete detailed CSI. This partial action approach reduces processing complexity for the gNB while maintaining sufficient information for reliable transmission decisions.
3Measurement precision
If CSI measurements are performed for all TRPs and panels, then comprehensive channel state information is obtained, but the time required for measurements increases
Solution Approach 1:
The patent implements preliminary action by configuring measurement resources and triggering mechanisms in advance. The gNB can pre-configure which TRPs/panels require measurement and under what conditions, allowing the UE to perform measurements only when needed rather than continuously, thus reducing measurement time while maintaining accuracy when required.
Solution Approach 2:
The patent enables periodic CSI measurement and reporting cycles where the UE measures CSI for multiple TRPs/panels at scheduled intervals rather than continuously. This periodic action allows comprehensive measurements to be performed at optimal times while reducing overall measurement duration through time-division multiplexing of measurement activities.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for channel state information reporting. One method includes receiving channel state information report configuration information. The channel state information report configuration information includes: information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero power channel state information reference signal resource set for channel measurement; and information indicating that the channel state information report configuration corresponding to multiple points is used. The multiple points are associated with a primary group of points or a secondary group of points. The method includes performing channel measurements using the at least one non-zero power channel state information reference signal resource set. The method includes generating a set of channel state information reports based on the channel state information report configuration information.