Type I Codebook Structure for High-Rank CSI-RS Beamforming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Type I codebooks in wireless communication networks are limited in supporting a large number of CSI-RS ports and do not effectively handle transmission scenarios with ranks higher than 4, leading to inefficiencies in signal transmission and reception.
Innovation Solution
Enhancement of Type I codebooks to support up to 128 CSI-RS ports through multiple panels, enabling transmission scenarios with ranks 5, 6, 7, or 8, and incorporating Codebook Subset Restriction (CBSR) configurations to optimize beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing Type I codebooks are used, then the system is simple to implement, but the system cannot support a large number of CSI-RS ports or transmission ranks higher than 4
Solution Approach 1:
The codebook is segmented into multiple codebook groups, where each group corresponds to a specific transmission rank. This segmentation allows the system to support higher transmission ranks (up to rank 8) and more CSI-RS ports (up to 128) by organizing precoding matrices in a structured manner across different rank levels, thereby improving adaptability without overwhelming complexity
Solution Approach 2:
The patent introduces a new dimensional organization to the codebook structure by implementing codebook groups indexed by transmission rank. This additional dimensional layer allows the system to efficiently manage and select precoding matrices for high-rank transmissions, enabling support for ranks greater than 4 and up to 128 CSI-RS ports
2Productivity
If Type I codebook is enhanced to support up to 128 CSI-RS ports and ranks 5-8, then transmission efficiency improves, but codebook complexity increases
Solution Approach 1:
The patent changes key parameters of the codebook structure, specifically extending the number of supported CSI-RS ports from traditional limits to 128 ports, and extending supported transmission ranks from typically 1-4 to include ranks 5-8. These parameter changes enable higher transmission efficiency and capacity while maintaining a systematic codebook organization through rank-based grouping
3Quantity of substance
If multiple panels are introduced in type I codebook, then the number of supported CSI-RS ports increases, but the complexity of spatial basis selection increases
Solution Approach 1:
The system segments the spatial basis selection process by associating different spatial bases with different panels. Each panel can be independently configured with its own spatial basis characteristics, allowing the system to support up to 128 CSI-RS ports through multiple panels while managing selection complexity through this segmented organizational approach
Data Source
AI summary
Disclosed are methods, systems, and computer-readable medium to perform operations that include receiving a channel state information reference signal (CSI-RS), and in response to receiving the CSI-RS, estimating CSI using a type I codebook. The type I codebook corresponds to a plurality of panels, and each panel of the plurality of panels corresponds to one CSI-RS resource.