NR PUCCH-PUSCH Multiplexing for Spatial Parameter Conflicts
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Solution Overview
Problem
In the New Radio (NR) system, conflicts arise when physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH) overlap in the time domain, and there is a need to address how to handle such scenarios, particularly when PUCCHs are associated with multiple spatial parameters. Additionally, reporting power headroom reports (PHR) in multi-antenna panel scenarios is a challenge.
Innovation Solution
The method involves multiplexing UCI information carried in PUCCHs onto PUSCHs with the same spatial parameters and optimizing PHR reporting by discarding or adjusting overlapping channels based on spatial parameter information and priority rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UCI information carried in PUCCHs is multiplexed onto PUSCHs with the same spatial parameters, then the conflict between PUCCH and PUSCH is resolved, but some PUCCHs still overlap with PUSCHs in the time domain after multiplexing
Solution Approach 1:
The patent segments the channel multiplexing process into two stages: first multiplexing PUCCHs with matching spatial parameters onto corresponding PUSCHs, then handling remaining overlapping PUCCHs separately. This segmentation resolves the contradiction by breaking down the complex multiplexing problem into manageable parts, ensuring reliable UCI transmission while reducing overall system complexity.
Solution Approach 2:
The patent introduces spatial parameters as an intermediary criterion for determining which PUCCHs can be multiplexed onto which PUSCHs. This intermediary mechanism enables systematic resolution of channel conflicts by using spatial parameter matching as the decision basis, thereby improving transmission reliability while maintaining manageable complexity through rule-based allocation.
2Loss of time
If all overlapping PUCCHs are multiplexed onto PUSCHs, then time domain conflicts are eliminated, but the processing complexity and power management difficulty increase
Solution Approach 1:
The patent applies local quality by treating different PUCCH-PUSCH conflict scenarios differently based on their spatial parameter characteristics. Instead of applying a uniform multiplexing rule to all overlapping channels, the patent selectively multiplexes only those PUCCHs whose spatial parameters match the corresponding PUSCHs, thereby reducing processing complexity while still eliminating time domain conflicts for the multiplexed portion.
Solution Approach 2:
The patent implements partial action by multiplexing only the subset of PUCCHs that can be matched with PUSCHs based on spatial parameters, rather than forcing multiplexing of all overlapping PUCCHs. This partial approach eliminates time domain conflicts for the multiplexed channels while avoiding the excessive complexity that would arise from handling all conflicts uniformly.
3Measurement precision
If PHR is reported for each spatial parameter separately, then power headroom accuracy is improved, but the reporting overhead and processing complexity increase
Solution Approach 1:
The patent merges PHR reporting for multiple spatial parameters into a single uplink message, combining what would otherwise be separate reports. This merging approach maintains measurement precision by including PHR information for each spatial parameter while reducing the quantity of separate messages transmitted, thereby lowering reporting overhead and processing complexity.
Solution Approach 2:
The patent creates a universal PHR reporting mechanism that handles multiple spatial parameters within a single message structure. This multi-functional approach allows the same reporting channel to carry power headroom information for different spatial parameters simultaneously, improving measurement precision without proportionally increasing reporting overhead.
Data Source
AI summary
A terminal device performs: multiplexing UCI information carried in PPUCCHs among M PUCCHs onto PUSCHs associated with same spatial parameters as the PPUCCHs among N PUSCHs, where the M PUCCHs overlap with the N PUSCHs in a time domain, and after multiplexing, S PUCCHs existing in the M PUCCHs overlap with PUSCHs among the N PUSCHs in the time domain, M, N, P and S are all positive integers, and S=M−P; and multiplexing UCI information carried in the S PUCCHs onto PUSCHs associated with a first target spatial parameter among the N PUSCHs; or transmitting first uplink information, where the first uplink information does not comprise at least one of: part or all of the S PUCCHs, or part or all of the PUSCHs overlapping with the S PUCCHs in the time domain among the N PUSCHs.