PUSCH Codebook Subset Selection for Lower Uplink Signaling Overhead
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Solution Overview
Problem
There is a need for improvements in 5G NR technology, particularly in the management and optimization of codebook-based transmissions in wireless communication systems to enhance performance and efficiency.
Innovation Solution
The implementation of methods and apparatuses at network entities, such as user equipment (UE) and network nodes, for partitioning and recommending subsets of codebooks, enabling efficient transmission and reception of physical uplink shared channel (PUSCH) based on selected codebooks and uplink grants, facilitating better communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of codebooks are configured for comprehensive transmission optimization, then transmission performance is improved, but device complexity and resource management overhead increase
Solution Approach 1:
The patent divides the complete codebook into multiple subsets, where each subset contains codebooks suitable for specific transmission conditions or antenna configurations. This segmentation allows the system to maintain a comprehensive codebook for optimal performance while only activating relevant subsets based on current channel conditions, thereby reducing management complexity without sacrificing transmission performance.
Solution Approach 2:
The patent implements dynamic codebook subset selection where the network can adaptively choose which codebook subset to use based on real-time channel conditions, UE capability, and transmission requirements. This dynamic approach enables the system to optimize transmission performance by selecting appropriate codebooks while keeping the active codebook set small enough to manage efficiently.
2Productivity
If codebook partitioning and recommendation mechanisms are implemented, then resource management efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent implements codebook subset indication (CSI) reporting where the UE reports channel state information for a limited subset of codebooks rather than all configured codebooks. This partial action approach enables efficient resource management by focusing computational resources on evaluating only the most relevant codebook subsets, while the signaling overhead is kept manageable by reporting only on the subset rather than the complete codebook set.
Data Source
AI summary
Apparatus, methods, and computer program products for wireless communication are provided. An example method may include transmitting, for a second network entity, information indicative of partitioning of one or more subsets of codebooks in a configured set of codebooks and information indicative of one recommended subset of codebooks in the one or more subsets of codebooks, where each respective codebook in the set of codebooks corresponds to a respective precoder. The example method may further include receiving, in an uplink grant from the second network entity, information indicative of a selected codebook in the recommended subset of codebooks. The example method may further include transmitting a PUSCH transmission based on the selected codebook and the uplink grant.