A-CSI Multiplexing on PUSCH Repetitions
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Solution Overview
Problem
Wireless communication systems face challenges in supporting aperiodic-channel state information (CSI) multiplexing when physical uplink shared channel (PUSCH) repetitions are scheduled over multiple transport blocks, leading to undefined multiplexing rules and reduced channel scheduling efficiency.
Innovation Solution
The techniques involve a user equipment (UE) receiving downlink control information (DCI) to schedule PUSCH repetitions over multiple transport blocks and multiplexing CSI on specific transmission occasions based on PUSCH repetition types and associated rules, allowing for efficient CSI reporting across multiple transport blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUSCH repetitions are scheduled over multiple transport blocks, then channel scheduling efficiency is improved, but A-CSI multiplexing rules become undefined
Solution Approach 1:
The patent segments the PUSCH repetitions into multiple transport blocks with distinct transmission occasions, allowing A-CSI to be multiplexed on specific segments (transport blocks) rather than treating all repetitions uniformly. This segmentation enables precise control over where CSI multiplexing occurs, resolving the undefined rules problem while maintaining scheduling efficiency.
Solution Approach 2:
The patent applies different multiplexing rules to different transport blocks based on their specific characteristics and transmission occasions. Each transport block can have customized A-CSI multiplexing behavior depending on its position, duration, and scheduling parameters, allowing local optimization without affecting the entire PUSCH repetition set.
2Reliability
If A-CSI is multiplexed on multiple transmission occasions, then reporting reliability is improved, but latency increases
Solution Approach 1:
The patent enables A-CSI to be multiplexed on the first transmission occasion of a transport block before the actual data transmission completes. This preliminary action allows the CSI report to be sent early in the PUSCH repetition sequence, reducing latency while maintaining reliability through the structured multiplexing framework that ensures proper timing and resource allocation.
3Adaptability or versatility
If PUSCH repetition type A is used, then transmission flexibility is improved, but CSI multiplexing timing becomes ambiguous
Solution Approach 1:
The patent introduces dynamic determination of transmission occasions based on the actual PUSCH repetition configuration and transport block structure. Instead of using fixed timing rules, the system dynamically calculates when A-CSI should be multiplexed based on the specific repetition type, transport block duration, and scheduling parameters, resolving the timing ambiguity while preserving transmission flexibility.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Abase station may transmit downlink control information (DCI) to a user equipment (UE) that schedules repetitions of one or more physical uplink shared channels (PUSCHs) over repetitions of one or more transport blocks. In response to the DCI, the UE may multiplex first aperiodic-channel state information (A-CSI) on one or more repetitions of the one or more transport blocks in accordance with a repetition type of the PUSCH repetitions and one or more rules associated with the transport block repetitions. The UE may transmit the transport blocks including the one or more repetitions that include the multiplexed A-CSI to the base station. In some examples, the UE may select the one or more rules based on whether a timing offset between reception of the DCI and the transmission of the transport blocks is satisfied.