Differentiated Codebook Reporting Parameters for NR MIMO
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Solution Overview
Problem
Existing New Radio (NR) type II codebooks in frequency domain are inadequate for extending to higher ranks without restrictions under Multiple-Input Multiple-Output (MIMO) conditions, leading to inconsistent channel information reporting accuracy across terminals.
Innovation Solution
A method to determine and configure reporting parameters for terminal devices based on their specific capabilities, including the number of spatial bases, frequency bases, and maximum non-zero elements, allowing for differentiated channel information reporting that adapts to individual device conditions and capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing NR type II codebook is directly extended to higher rank without restrictions, then codebook coverage is improved, but channel information reporting accuracy deteriorates
Solution Approach 1:
The patent introduces a maximum number of non-zero elements parameter to restrict the codebook structure. By controlling the sparsity pattern through this parameter, the codebook can be extended to higher ranks while maintaining accurate channel representation. This parameter change enables balanced extension without sacrificing reporting accuracy.
Solution Approach 2:
The patent segments the codebook structure by introducing selective DFT bases and controlling non-zero element positions. This segmentation allows different parts of the codebook to serve different functions, enabling higher rank support while maintaining precision in critical channel information components.
2Device complexity
If unified channel information reporting parameters are used for all terminals, then system complexity is reduced, but reporting accuracy consistency across terminals deteriorates
Solution Approach 1:
The patent applies local quality by configuring different maximum numbers of non-zero elements for different terminals based on their capabilities. Each terminal receives tailored parameters that match its specific requirements, ensuring optimal reporting accuracy for each device while maintaining a relatively simple overall system structure.
3Measurement precision
If differentiated reporting parameters are configured for each terminal device, then reporting accuracy is improved, but system complexity increases
Solution Approach 1:
The patent manages complexity by introducing a single key parameter (maximum number of non-zero elements) that can be differentiated across terminals. This focused parameter change approach enables accurate reporting without requiring complex multi-parameter configurations, balancing precision with manageable system complexity.
Data Source
AI summary
A codebook information processing method includes that: a reporting parameter is determined respectively for each of at least one terminal device, different terminal devices corresponding to different reporting parameters, the same terminal device corresponding to different reporting parameters under different conditions, and the reporting parameter including at least one of following information: the number of spatial bases, the number of frequency bases, and a maximum number of non-zero elements; and the reporting parameter respectively for each of the at least one terminal device is configured to different respectively.