PUCCH Priority Multiplexing for URLLC and eMBB Overlap
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Solution Overview
Problem
In 5G communication systems, conflicts between URLLC and eMBB services lead to preferential transmission of URLLC data and control information, resulting in performance loss for eMBB services, necessitating improved methods for uplink control information transmission.
Innovation Solution
A multiplexing method that prioritizes and multiplexes Physical Uplink Control Channels (PUCCHs) with different priorities, enhancing transmission probability of lower priority HARQ-ACK and reducing downlink data retransmissions to increase system spectrum efficiency and scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If URLLC data and control information are preferentially transmitted, then URLLC service reliability is improved, but eMBB service performance deteriorates
Solution Approach 1:
The patent segments uplink control information into different priority levels (first priority for URLLC, second priority for eMBB). When PUCCH resources overlap, the system selectively transmits based on priority segmentation, ensuring URLLC reliability while maintaining eMBB performance through differentiated handling of segmented control information.
2Reliability
If multiple PUCCHs with different priorities are transmitted simultaneously, then transmission reliability of high priority UCI is improved, but resource conflict and system complexity increase
Solution Approach 1:
The patent changes the priority parameter of uplink control information to resolve conflicts. When PUCCH resources overlap, the system adjusts the transmission decision based on the priority parameter, transmitting high priority UCI while dropping or deferring low priority UCI, thereby simplifying conflict management while maintaining high priority reliability.
3Reliability
If low priority HARQ-ACK is dropped during PUCCH overlap, then high priority UCI transmission reliability is improved, but downlink data retransmission increases
Solution Approach 1:
The patent introduces an intermediary mechanism where the UE reports the dropping of low priority HARQ-ACK to the network side. This intermediary feedback allows the network to perform blind retransmission or alternative scheduling, reducing actual retransmission needs while maintaining high priority UCI reliability.
Data Source
AI summary
The disclosure provides a method performed by a second type of transceiving node in a wireless communication system, including receiving a first type of data and/or a first type of control signaling from a first type of transceiving node, and transmitting uplink control information (UCI) to the first type of transceiving node, wherein, if multiple physical uplink control channels (PUCCHs) with UCIs of different priorities overlap in a time domain, the multiple PUCCHs are multiplexed and/or prioritized.