Uplink Control Repetition Handling for UCI-Data Overlap Conflicts
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing overlapping between uplink control channel repetitions and uplink data transmissions, particularly when these channels have different priority indices, leading to conflicts that conventional prioritization rules fail to resolve.
Innovation Solution
A multi-stage conflict resolution procedure is implemented, involving stages based on priority index differences, UCI type, and starting slot indices to manage overlaps between uplink control channel repetitions and uplink data transmissions, allowing selective dropping or transmission of UCI and data based on priority indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional prioritization rules are used to manage overlapping uplink channels, then simple conflict resolution is achieved, but conflicts between channels with different priority indices cannot be properly resolved
Solution Approach 1:
The conflict resolution procedure is divided into multiple stages: first resolving overlaps between UCIs of the same priority index, then resolving overlaps between UCIs of different priority indices, and finally resolving overlaps between remaining UCI and uplink data transmissions. This segmentation allows systematic handling of complex conflicts while maintaining clear decision rules at each stage.
Solution Approach 2:
The procedure performs preliminary resolution of same-priority UCI conflicts before addressing different-priority conflicts. By pre-resolving same-priority overlaps using UCI type and starting slot index criteria, the system simplifies subsequent different-priority resolution and ensures high-priority transmissions are not inadvertently dropped.
2Reliability
If multi-stage conflict resolution procedure is implemented, then conflicts between different priority indices are resolved, but processing complexity increases
Solution Approach 1:
The conflict resolution procedure adapts dynamically based on the priority indices of overlapping channels. The system transitions between different resolution strategies depending on whether overlaps involve same-priority or different-priority channels, allowing flexible handling of various conflict scenarios while maintaining systematic decision-making.
Solution Approach 2:
Different resolution criteria are applied to different types of conflicts: same-priority conflicts use UCI type and starting slot index criteria, while different-priority conflicts use priority index comparison. This localized application of appropriate resolution rules ensures optimal outcomes for each conflict type without requiring a single complex universal rule.
3Reliability
If overlapping channels are resolved by dropping lower priority transmissions, then higher priority transmissions are ensured, but potential data loss occurs
Solution Approach 1:
The system performs preliminary resolution of same-priority UCI conflicts before dropping any transmissions. By first resolving same-priority overlaps using deterministic criteria (UCI type, starting slot index), the system minimizes unnecessary drops and ensures only truly conflicting transmissions are dropped after all resolution opportunities are exhausted.
Solution Approach 2:
The resolution outcome changes based on priority index parameters: same-priority conflicts are resolved using UCI type and timing parameters, while different-priority conflicts are resolved using priority index comparison. This parameter-based approach ensures that drops occur only when necessary to protect higher priority transmissions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a multi-stage overlap (e.g., conflict) resolution procedure based on a scheduling overlap between one or more repetitions of a first uplink control information (UCI) and one or more overlapping uplink transmissions having a different priority than the first UCI. The procedure may include a first stage based on a different starting slot index or UCI type between overlapping UCIs having a same priority, a second stage based on overlap resolution between the first UCI and an additional UCI, and a third stage based on overlap resolution between the first UCI and an uplink data transmission. The UE may selectively drop one or more of the overlapping UCIs or uplink transmissions and transmit at least a portion of the first UCI or the one or more overlapping uplink transmissions according to the procedure.