Codebook Subset Restriction for AI Channel State Information
Solution Overview
Problem
In wireless technologies, especially in 3GPP networks, the use of spatial beams for communication between base stations and user equipment can cause interference with other cells, particularly when user equipment approaches the edge of a cell, leading to reduced service quality and increased interference with neighboring cells.
Innovation Solution
Implementing codebook subset restriction, which involves configuring user equipment to restrict the maximum power of spatial beams and selecting specific subsets of beams for transmission, thereby reducing interference by forbidding certain beams from being used in the construction of precoders, and using artificial intelligence/machine learning for optimized channel state information reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial beams are utilized for communication between base stations and user equipment, then transmission reliability and strength are improved, but interference with other cells increases
Solution Approach 1:
The patent applies codebook subset restriction to selectively disable specific spatial beams (e.g., beams pointing toward cell edges or neighboring cells) while keeping other beams enabled. This creates local quality differentiation in beam usage, allowing the system to maintain high transmission reliability through selected beams while avoiding harmful interference in specific spatial directions.
Solution Approach 2:
The patent modifies the codebook parameter by restricting the set of allowable spatial beams from the full codebook to a subset. This parameter change enables the system to adapt beam selection based on interference conditions, thereby reducing interference with neighboring cells while preserving transmission reliability through the remaining valid beams.
2Object-generated harmful factors
If codebook subset restriction is applied to reduce interference, then interference with neighboring cells is minimized, but the number of available beams for transmission is reduced
Solution Approach 1:
Instead of disabling all beams, the patent applies partial action by selectively disabling only the subset of beams that cause interference with neighboring cells. This allows the system to maintain sufficient beam availability for transmission while achieving the desired interference reduction, balancing the trade-off between interference minimization and transmission capability.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for configuring codebook subset restriction and channel state information reporting for artificial intelligence/machine learning enabled channel state information reporting.