UCI Multiplexing Overlapping PUSCH Selection
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a challenge in resolving collisions or time overlaps between uplink channels such as PUSCH and PUCCH, which can lead to inefficiencies in multiplexing uplink control information (UCI) due to overlapping PUSCHs in the same component carrier, affecting the selection of PUSCH for UCI multiplexing.
Innovation Solution
A configuration for multiplexing UCI with overlapping PUSCHs based on UCI type, feedback mode, or carrier configuration, allowing selection of a suitable PUSCH for multiplexing by considering factors like CORESET Pool Index, dynamic grants, and timing alignment, to resolve collisions and optimize UCI transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUSCHs are allowed to overlap in time domain on the same carrier, then resource utilization and communication efficiency are improved, but collision resolution complexity and UCI multiplexing difficulty increase
Solution Approach 1:
The patent changes the parameter of PUSCH selection criteria by introducing UCI type as a determining factor. Different UCI types (HARQ-ACK, CSI, SR) map to different PUSCH selection rules, transforming a complex collision resolution problem into a manageable parameter-based decision process. This allows multiple PUSCHs to overlap while providing clear guidelines for UCI multiplexing based on UCI type, feedback mode, and carrier configuration.
2Reliability
If UCI is multiplexed with overlapping PUSCHs based on multiple factors (UCI type, feedback mode, carrier configuration), then UCI transmission reliability is improved, but processing complexity and decision-making difficulty increase
Solution Approach 1:
The patent segments the UCI multiplexing decision process into distinct cases based on UCI type (HARQ-ACK, CSI, SR). Each UCI type has specific multiplexing rules that consider feedback mode and carrier configuration separately. This segmentation transforms a monolithic complex decision problem into manageable discrete cases, improving reliability through targeted rules while reducing overall processing complexity through structured classification.
3Adaptability or versatility
If CORESET Pool Index associations are configured for multiple DCI operation, then support for multi-TRP and advanced communication modes is improved, but configuration complexity and overhead increase
Solution Approach 1:
The patent implements CORESET Pool Index associations with multi-functional capability. The same CORESET Pool Index configuration mechanism serves multiple purposes: it enables multi-TRP operation, supports multiple DCI operations, and provides the basis for PUSCH selection in UCI multiplexing decisions. This universal configuration approach enhances adaptability for advanced communication modes while minimizing additional configuration overhead by reusing existing CORESET structures.
Data Source
AI summary
Method and apparatus for multiplexing UCI with overlapping PUSCH based on a UCI type. The apparatus receives a configuration for multiple DCI operation including associations with CORESETs configured for the UE, the associations including CORESET pool index 0 or an absence of a CORESET pool index, and CORESET pool index 1. The apparatus transmits UCI multiplexed with a PUSCH from multiple overlapping PUSCHs that overlap in a time domain on a same carrier and overlap in the time domain with the UCI, the multiplexing being based on at least one of a type of the UCI, content of the UCI, a feedback mode or a carrier configuration.