PUSCH Repetition Multiplexing for Uplink Throughput
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Solution Overview
Problem
Current wireless communication systems face challenges in enhancing UIC multiplexing for URLLC without compromising the processing timeline for UL-SCH data and CSI reporting.
Innovation Solution
The proposed solution involves exploiting PUSCH repetition to multiplex CSI reports on a later repetition, rather than the first, while ensuring that the coding rate of the PUSCH is not altered, and potentially adding additional repetitions to maintain reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUSCH repetition is used to multiplex CSI reports on later repetitions, then system performance and UL throughput are enhanced, but the processing timeline for UL-SCH data and CSI reporting becomes tighter
Solution Approach 1:
The PUSCH transmission is divided into multiple repetitions, with CSI reports multiplexed on later repetitions rather than the first. This segmentation allows the UE to process UL-SCH data during earlier repetitions while reserving later repetitions for CSI reporting, thereby enhancing throughput without compromising processing timelines.
Solution Approach 2:
The UE performs preliminary processing of UL-SCH data during the first PUSCH repetition(s) before multiplexing CSI reports on later repetitions. This preliminary action ensures that data processing is completed within the required timeline while CSI reporting is deferred to subsequent repetitions.
2Productivity
If PUSCH repetition is used to multiplex CSI reports, then UL throughput is improved, but the coding rate of PUSCH may be altered
Solution Approach 1:
Different portions of the PUSCH repetition structure are assigned different functions: earlier repetitions are optimized for data transmission with appropriate coding rates, while later repetitions are designated for CSI reporting. This local quality differentiation allows throughput enhancement while maintaining the coding rate integrity for data transmission.
Solution Approach 2:
The system dynamically adjusts resource allocation parameters across different PUSCH repetitions, allocating different resource elements for data versus CSI reporting. This parameter change approach ensures that the coding rate for UL-SCH data remains unchanged while accommodating CSI reports in later repetitions.
3Reliability
If additional PUSCH repetitions are added to maintain reliability, then URLLC requirements are met, but system complexity increases
Solution Approach 1:
Later PUSCH repetitions serve multiple functions: they carry CSI reports and can also provide additional redundancy for URLLC transmissions. This multi-functionality allows the system to meet URLLC reliability requirements without proportionally increasing complexity, as the same repetitions serve both CSI reporting and reliability enhancement purposes.
Solution Approach 2:
The patent merges CSI reporting functionality with URLLC transmission redundancy by using the same later PUSCH repetitions for both purposes. This combining approach reduces overall system complexity compared to implementing separate mechanisms for CSI reporting and URLLC reliability.
Data Source
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AI summary
Apparatuses, systems, and methods to enhance system performance (e.g., UL throughput) without impinging on (e.g., tightening) processing timeline for UL-SCH data and/or CSI reporting. A base station may request for a UE to send a CSI report (s) during PDCCH monitoring. The base station may also request the UE to send UL-SCH data. At a first transmit opportunity, the UE may transmit first PUSCH (including UL-SCH data that may be multiplexed onto the first PUSCH). Additionally, at a second (later) transmit opportunity, the UE may transmit second PUSCH (including the CSI report (s) that may be multiplexed onto the second PUSCH). The second transmit opportunity may be identified as a transmit opportunity starting at least a specified number of symbols after a first symbol of the first repetition. The specified number of symbols may be dependent upon at least one of UE uplink processing time capabilities or SCS.