CSI Report Multiplexing on Multi-Beam PUSCH Repetitions
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently multiplexing and transmitting channel state information (CSI) reports across multiple PUSCH repetitions due to variations in symbol numbers and uplink control information (UCI) distribution, which affects data transmission reliability and efficiency.
Innovation Solution
A method is introduced where a user equipment (UE) determines whether to multiplex CSI reports on one or both PUSCH repetitions based on the number of symbols and the presence of UCI, optimizing the transmission by associating different sets of PUSCH repetitions with distinct SRS resource sets and power control parameters to enhance reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI reports are multiplexed on multiple PUSCH repetitions with different symbol numbers and UCI distributions, then transmission reliability is improved through diversity, but resource allocation complexity increases
Solution Approach 1:
The PUSCH repetitions are divided into different sets (first set and second set) with distinct SRS resource set associations. Each set can be independently configured with different symbol numbers and UCI distributions, allowing flexible CSI report multiplexing strategies for each segment while maintaining overall reliability through diversity.
Solution Approach 2:
The system dynamically selects which PUSCH repetition set to use for CSI report multiplexing based on current channel conditions, symbol availability, and UCI requirements. This dynamic adaptation allows the system to optimize reliability by choosing the most suitable repetition set while managing resource allocation complexity through condition-based decision-making.
2Productivity
If different SRS resource sets are associated with different PUSCH repetition sets, then transmission efficiency is improved through optimized resource allocation, but system complexity increases
Solution Approach 1:
Multiple SRS resource sets are configured to serve different PUSCH repetition sets, with each SRS resource set capable of being associated with specific PUSCH repetition characteristics (symbol numbers, UCI distributions). This multi-functional configuration allows a single SRS resource set framework to handle diverse transmission scenarios, improving efficiency without proportionally increasing system complexity.
Data Source
AI summary
A UE receives DCI scheduling a first set of PUSCH repetitions associated with a first SRS set and a second set of PUSCH repetitions associated with a second SRS set. The UE determines whether to multiplex at least one CSI report on one PUSCH repetition of the first set of PUSCH repetitions, one PUSCH repetition of the second set of PUSCH repetitions, or both based on whether a number of symbols in the one PUSCH repetition of the first set of PUSCH repetitions and in the one PUSCH repetition of the second set of PUSCH repetitions is different, and/or UCI excluding the at least one CSI report will be transmitted in the one PUSCH repetition of the first set of PUSCH repetitions or the one PUSCH repetition of the second set of PUSCH repetitions.