Uplink PUSCH Precoding Signaling Overhead Reduction
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Solution Overview
Problem
The existing codebook-based Physical Uplink Shared Channel (PUSCH) transmission in multi-TRP scenarios results in high DCI signaling overhead and reduced DCI demodulation performance.
Innovation Solution
The proposed uplink transmission method involves receiving configuration signaling with a first indication field that indicates TPMI indication information, and determining the precoding used for PUSCH transmission based on this information, thereby reducing DCI signaling overhead and enhancing robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If codebook-based PUSCH transmission with multiple TPMI domains is used for multi-TRP enhancement, then transmission reliability is improved, but DCI signaling overhead increases
Solution Approach 1:
The patent extracts and removes the second TPMI domain from the DCI signaling for codebook-based PUSCH transmission in multi-TRP scenarios. By taking out this redundant component, the signaling overhead is reduced while maintaining transmission reliability through alternative mechanisms such as SRI domain usage and network-side precoding determination.
2Reliability
If codebook-based PUSCH transmission with multiple TPMI domains is used for multi-TRP enhancement, then transmission robustness is improved, but DCI demodulation performance deteriorates
Solution Approach 1:
The patent removes the second TPMI domain from DCI signaling, which simplifies the demodulation process and improves performance. The extraction of this complex component reduces the computational burden during DCI demodulation while maintaining robustness through alternative signaling approaches.
Solution Approach 2:
The patent makes the SRI domain serve multiple functions: it not only indicates SRS resources but also implicitly determines the precoding matrix through its interaction with the single remaining TPMI domain. This multi-functionality reduces the need for separate TPMI domains and simplifies the overall system complexity.
Data Source
AI summary
The present disclosure relates to the field of communications, and provides an uplink transmission method and apparatus, a device, and a readable storage medium. The method includes: receiving configuration signaling, the configuration signaling comprising a first indication field, and the first indication field being used for indicating precoding matrix indicator information, i.e., TPMI indication information when a terminal sends codebook-based uplink transmission of a physical uplink shared channel (PUSCH); and determining, on the basis of the TPMI indication information, precoding used when the PUSCH is sent, wherein the terminal reports whether to support the capability of a second TPMI indication field.