Uplink Codebook Configuration via Segmented DCI for CSI Feedback
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Solution Overview
Problem
Existing wireless communication networks face inefficiencies in CSI reporting and codebook structures for uplink transmissions, leading to suboptimal performance in high-resolution CSI feedback.
Innovation Solution
The method involves configuring a codebook corresponding to Transmit Precoding Matrix Information (TPMI) by receiving a codebook configuration from a network, transmitting sounding reference signals (SRS), and decoding TPMI via Downlink Control Information (DCI) for scheduling Physical Uplink Shared Channel (PUSCH) transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing CSI reporting and codebook structures are used for uplink transmission, then the system can maintain simplicity in implementation, but the performance of high-resolution CSI feedback becomes suboptimal
Solution Approach 1:
The patent segments the codebook configuration into multiple parts: a first codebook configuration received via first signaling (e.g., RRC signaling) and a second codebook configuration received via second signaling (e.g., DCI). This segmentation allows the system to maintain high-resolution CSI feedback capability while managing complexity through structured information delivery, resolving the contradiction between measurement precision and productivity.
Solution Approach 2:
The patent implements dynamic codebook configuration where the UE can be provided with different codebook configurations depending on the transmission scenario. The network can dynamically select between first codebook and second codebook based on current channel conditions and transmission requirements, enabling the system to adapt to changing conditions and maintain optimal performance without sacrificing implementation simplicity.
2Productivity
If enhanced UL codebook-based transmission with high-resolution CSI feedback is implemented, then codebook performance is improved, but CSI feedback overhead increases
Solution Approach 1:
The patent applies local quality by providing different levels of codebook configuration detail at different stages. The first codebook configuration provides basic settings with lower overhead, while the second codebook configuration provides enhanced settings with higher resolution when needed. This allows the system to optimize codebook performance only where necessary, reducing overall CSI feedback overhead while maintaining high performance when required.
Solution Approach 2:
The patent changes parameters related to codebook configuration based on transmission requirements. The network can adjust codebook size, resolution, and other parameters dynamically by selecting between first and second codebook configurations. This parameter adjustment enables the system to achieve high codebook performance with reduced feedback overhead by using coarser configurations when fine-grained precision is not needed.
3Adaptability or versatility
If multiple codebook configurations are provided to the UE, then codebook performance and adaptability are improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by providing the first codebook configuration in advance through first signaling before the actual transmission occurs. This allows the UE to have the basic codebook settings ready beforehand, reducing the complexity of processing during transmission. The second codebook configuration can then be added as needed without requiring the UE to handle all possible configurations simultaneously, thus improving adaptability while managing device complexity.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for configuring a codebook corresponding to TPMI. One method includes receiving a codebook configuration from a network. The codebook configuration corresponds to an enhanced UL codebook-based transmission, the codebook corresponds to a TPMI, the TPMI corresponds to uplink transmission, and the TPMI corresponds to at least one layer. The method includes transmitting a set of SRSs. The method includes receiving the TPMI via a DCI for scheduling a PUSCH transmission. The DCI is received on a PDCCH, a PDSCH, or a combination thereof, and the DCI is decomposed into a first stage DCI and a second stage DCI. The method includes receiving a subset of codebook parameters corresponding to the TPMI in a second stage DCI. The second stage DCI is received in the PDCCH, the PDSCH, or a combination thereof.