UE Codebook Capability Reporting Under Narrow Bandwidth Limits
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing UE capability reporting for port selection codebooks, particularly in scenarios with limited bandwidth, leading to increased implementation complexity.
Innovation Solution
A method for UE and network devices to manage port selection codebook reporting by defining specific parameter combinations and rules based on bandwidth availability, including reporting subsets of parameters such as M, α, β, and R, and configuring UE capabilities accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE reports all port selection codebook parameters (M, α, β, R) in narrow bandwidth scenarios, then the reporting completeness is improved, but the UE implementation complexity increases
Solution Approach 1:
The patent extracts and reports only the necessary subset of codebook parameters (M, α, β, R) based on the active bandwidth part size. When the BWP size is below a threshold, the UE reports a simplified parameter set, eliminating the need to report all possible parameters and thereby reducing implementation complexity while maintaining essential reporting functionality.
Solution Approach 2:
The patent changes the parameter reporting behavior based on the bandwidth part size. Different parameter sets are reported depending on whether the active BWP is narrow or wide, allowing the system to adapt the reporting complexity to the actual bandwidth conditions and reduce unnecessary reporting overhead in narrow bandwidth scenarios.
2Device complexity
If the UE operates according to a rule that it is not expected to report port selection codebooks in narrow bandwidth, then the UE implementation complexity is reduced, but the capability reporting accuracy deteriorates
Solution Approach 1:
The patent makes the reporting behavior dynamic rather than static. The UE adapts its reporting strategy based on the actual active bandwidth part size, switching between different reporting modes (full parameter reporting, subset reporting, or rule-based omission) to match the current bandwidth conditions, thereby maintaining accuracy when needed while reducing complexity when appropriate.
3Adaptability or versatility
If the UE is configured with port selection codebooks by the BS in narrow bandwidth scenarios, then the system adaptability is improved, but the UE implementation complexity increases
Solution Approach 1:
The patent segments the codebook parameter reporting into different groups based on bandwidth conditions. When the active BWP is narrow, only specific parameter subsets are configured and reported, while other parameters are omitted. This segmentation allows the system to maintain adaptability for different bandwidth scenarios while reducing the complexity burden on the UE in narrow bandwidth conditions.
Data Source
AI summary
The application describes methods and apparatus related to signaling of a user equipment's codebook capabilities. Some embodiments describe signaling associated with a type II port selection codebook or concurrent mixed codebook types.