PUCCH PUSCH Overlap Handling in 5G NR Uplink
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Solution Overview
Problem
In new radio (NR) systems, the existing technologies face challenges in handling the partial overlapping of physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH), which can lead to collisions and interference, affecting the reliability and efficiency of control information transmission.
Innovation Solution
The proposed solution involves defining mechanisms to handle partial overlapping scenarios by multiplexing UCI types, adjusting transmission timing, and prioritizing UCI types, such as HARQ-ACK and SR, to ensure alignment between the user equipment (UE) and the 5G NodeB, and dropping or delaying less prioritized transmissions to maintain channel integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUCCH and PUSCH transmissions are allowed to overlap in time, then transmission flexibility and channel utilization are improved, but collisions and interference occur affecting reliability
Solution Approach 1:
The patent segments the time domain by introducing a first threshold value that divides the time interval into a first time interval (before threshold) and second time interval (after threshold). This segmentation allows different transmission behaviors in different time periods, enabling flexibility while preventing collisions through structured time division.
Solution Approach 2:
The patent applies dynamic threshold adjustment based on the number of overlapping PUCCHs and PUSCHs. The first threshold value is dynamically determined based on the count of overlapping transmissions, allowing the system to adapt to different collision scenarios and maintain reliability under varying transmission conditions.
2Productivity
If multiple UCI types are multiplexed on the same PUCCH, then channel utilization is improved, but transmission timing alignment between UE and NodeB becomes complex
Solution Approach 1:
The patent performs preliminary timing adjustment by determining a second time interval based on the first time interval and the determined first threshold value. This preliminary timing calculation ensures that the UE and NodeB are aligned before actual transmission occurs, simplifying the overall timing synchronization while enabling multiple UCI type multiplexing.
3Reliability
If less prioritized transmissions are dropped during collision, then channel integrity is maintained, but transmission efficiency decreases
Solution Approach 1:
The patent changes the transmission parameter by introducing a second threshold value that determines how to handle the second time interval. Based on whether the second time interval is less than or equal to the second threshold value, the system either drops less prioritized transmissions or allows them to proceed, optimizing the balance between channel integrity and transmission efficiency.
Data Source
AI summary
Briefly, in accordance with one or more embodiments, an apparatus of a user equipment (UE) to operate in a New Radio (NR) system comprises one or more baseband processors to determine if two or more uplink signals partially overlap, determine a multiplexing rule, a dropping rule, or a priority rule for the two or more uplink signals, and to multiplex, drop, or prioritize the two or more uplink signals for transmission according to the multiplexing rule, dropping rule, or priority rule, and a memory to store two or more uplink signals.