Priority-Based UCI Handling in PUCCH-PUSCH Time Overlap
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Solution Overview
Problem
In the new radio (NR) system, when time domain resources of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) overlap, the user equipment (UE) cancels the transmission of low-priority channels, leading to the loss of uplink control information (UCI) and reduced transmission performance.
Innovation Solution
The UE processes UCI based on priority and type information, allowing for the multiplexing or dropping of UCI on overlapping channels to ensure transmission of high-priority information, thereby improving the performance of uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE cancels transmission of low-priority channels when time domain resources overlap, then high-priority channel transmission is ensured, but UCI carried on low-priority channels is lost and uplink transmission performance is reduced
Solution Approach 1:
The patent merges the transmission of high-priority and low-priority UCI by multiplexing low-priority UCI onto the high-priority PUSCH channel. When time domain resources overlap, instead of canceling low-priority transmission, the low-priority UCI is combined with high-priority data on the same physical uplink shared channel, ensuring both priorities are transmitted simultaneously without resource conflict
Solution Approach 2:
The patent implements dynamic priority handling where the UE adapts its transmission strategy based on the specific overlap scenario. The processing determines whether to multiplex low-priority UCI on high-priority PUSCH or apply other dynamic adjustments, allowing flexible optimization of uplink transmission performance rather than rigid cancellation of low-priority channels
2Productivity
If the UE multiplexes UCI on PUSCH for same-priority overlapping channels, then transmission resource utilization is improved, but the complexity of UCI processing increases
Solution Approach 1:
The patent changes the processing parameters based on priority levels and channel types. The network configures specific parameters through RRC signaling that dictate how UCI should be processed and multiplexed under different scenarios, allowing the UE to follow predefined rules rather than performing complex real-time decisions, thus reducing processing complexity while maintaining high resource utilization
Data Source
AI summary
An information processing method and apparatus, and user equipment. The method includes: in a case that a time domain resource of an uplink data channel overlaps that of at least one uplink control channel, processing at least one piece of UCI according to first target information, where the at least one piece of UCI is UCI carried on the at least one uplink control channel or includes UCI carried on the uplink data channel and UCI carried on the at least one uplink control channel, and the first target information includes at least one of the following: priority information, type information of information carried on the uplink data channel, or type information of the UCI carried on the at least one uplink control channel.