UCI Transmission Priority Selection for Overlapping PUSCH Resources
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Solution Overview
Problem
In the 5G NR system, when uplink channels with different priorities overlap in the time domain, the low priority channel is always dropped, leading to potential transmission failures and inefficiencies in UCI transmission.
Innovation Solution
A method for UCI transmission where a terminal selects a PUSCH without carrying the second UCI from overlapping PUSCHs preferentially and transfers the first UCI to that PUSCH for transmission, or determines a corresponding UCI transmission mode based on the UCI carried on a target PUSCH, ensuring proper prioritization and avoiding transmission failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the low priority channel is always dropped when uplink channels with different priorities overlap in time domain, then the implementation complexity is reduced, but transmission reliability deteriorates
Solution Approach 1:
The patent introduces dynamic priority adjustment mechanisms where the terminal can flexibly select which channel to transmit based on real-time conditions. The system transitions from static priority dropping to dynamic priority selection, allowing the terminal to adapt to different transmission scenarios and ensure reliable UCI delivery while managing complexity through standardized selection criteria.
2Productivity
If only the high priority channel is transmitted when resources overlap, then the transmission efficiency is improved, but information completeness deteriorates
Solution Approach 1:
The patent segments the UCI transmission process into distinct components (HARQ-ACK, CSI, SR) and applies different handling strategies to each. By segmenting the transmission decisions, the system can selectively transmit high-priority information while preserving low-priority information through alternative mechanisms, thus maintaining information completeness without sacrificing transmission efficiency.
Solution Approach 2:
The patent employs parameter changes in the form of priority level adjustments and transmission mode selections. The terminal can change transmission parameters dynamically to ensure both high-priority and low-priority UCIs are transmitted, using parameter flexibility to resolve the contradiction between transmission efficiency and information completeness.
3Reliability
If multiple PUSCHs are selected for UCI transmission, then the transmission reliability is improved, but the selection complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing selection criteria and priority rules before resource conflicts occur. The terminal is configured with predefined rules for selecting among multiple PUSCHs, which simplifies the real-time decision-making process. This preliminary setup maintains transmission reliability through systematic selection while avoiding complex ad-hoc decision logic during actual transmission.
Data Source
AI summary
Embodiments of the present disclosure provide a UCI transmission method and apparatus, a terminal, a network device, and a storage medium. The method is applied to a terminal and comprises: when a time domain resource of a PUCCH carrying a first UCI overlaps with time domain resources of multiple PUSCHs and when the multiple PUSCHs comprise a PUSCH carrying a second UCI, preferentially selecting a PUSCH that does not carry the second UCI from the multiple PUSCHs, and transmitting the first UCI on the selected PUSCH that does not carry the second UCI; or selecting a target PUSCH used for carrying the first UCI from the multiple PUSCHs, and determining a corresponding UCI transmission mode according to UCI information carried by the target PUSCH. Therefore, a specific UCI transmission method is provided for the problem that no clear transmission scheme is provided for relevant scenes, thereby ensuring the normal operation of a system.