CSI Report Configuration with Codebook List for NCJT
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE networks, face challenges in efficiently configuring channel state information (CSI) reports for non-coherent joint transmission (NCJT) scenarios, which require multiple codebooks to effectively manage CSI-RS resources across different transmission reception points (TRPs).
Innovation Solution
The proposed solution involves providing a CSI report configuration with a list of codebooks, allowing user equipment (UE) to determine the appropriate codebook for each triggered CSI-RS resource. This configuration associates each CSI-RS resource with a set of ports or port groups, enabling the UE to select the optimal codebook based on performance evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single codebook is used for all CSI-RS resources, then the configuration is simple, but the CSI reporting accuracy deteriorates in multi-TRP scenarios
Solution Approach 1:
The patent divides the single codebook into multiple codebooks, where each codebook is associated with specific CSI-RS resources or TRPs. This segmentation allows the UE to select the appropriate codebook for each TRP based on channel conditions, thereby improving CSI reporting accuracy without excessive complexity
Solution Approach 2:
The patent introduces dynamic codebook selection mechanisms where the UE can switch between different codebooks based on real-time channel conditions and TRP performance. This dynamic adaptation enables optimal CSI reporting for each TRP while maintaining manageable system complexity through standardized selection criteria
2Measurement precision
If multiple codebooks are provided for different TRPs, then the CSI reporting accuracy improves, but the configuration complexity increases
Solution Approach 1:
The patent designs a universal codebook structure that can be applied across multiple TRPs and CSI-RS resources. Each codebook is constructed with standardized formats that work for different TRP configurations, reducing the need for custom codebook designs and thereby limiting the increase in configuration complexity
Solution Approach 2:
The patent uses parameter changes to differentiate between codebooks for different TRPs rather than creating entirely new codebook structures. By modifying parameters such as codebook size, precision level, or selection criteria based on TRP characteristics, the system achieves accurate CSI reporting with manageable configuration complexity
3Measurement precision
If codebook selection is performed manually, then the accuracy is controllable, but the operation efficiency decreases
Solution Approach 1:
The patent implements self-service codebook selection mechanisms where the UE automatically evaluates channel conditions and selects the optimal codebook without manual intervention. The UE monitors TRP performance metrics and autonomously determines the best codebook, thereby maintaining high selection accuracy while significantly improving configuration operation efficiency
Solution Approach 2:
The patent incorporates feedback mechanisms where the UE continuously monitors CSI reporting performance and TRP channel conditions. Based on this feedback, the UE dynamically adjusts codebook selection to optimize accuracy while maintaining efficient automated operation. The feedback loop enables the system to adapt to changing conditions without requiring manual reconfiguration
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for a channel state information (CSI) report configuration with a codebook list, for example, for non-coherent joint transmission (NCJT). A method for wireless communication that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration is associated with one or more CSI reference signal (RS) resources. Each CSI-RS resource includes a set of ports or port groups. The UE receives a list of codebooks associated with the configuration. The UE determines at least one codebook, from the list of codebooks, to apply for one or more triggered CSI-RS resources.