Uplink Control Information Multiplexing for Reduced Feedback Latency
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Solution Overview
Problem
The existing wireless communication systems face challenges in reducing feedback latency of ACK/NACK information, which affects data transmission efficiency and increases latency.
Innovation Solution
A method for multiplexing uplink control information is introduced, where resources for different HARQ-ACK information channels are determined to overlap in time domain, allowing for the multiplexing of appropriate uplink control information for transmission, thereby improving transmission reliability and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple HARQ-ACK codebooks are transmitted using time division multiplexing in one slot, then feedback latency is reduced, but resource allocation complexity increases
Solution Approach 1:
The patent segments uplink control information into multiple independent PUCCH resources, each carrying a specific HARQ-ACK codebook. This allows parallel transmission of multiple codebooks in the same slot without requiring complex joint scheduling, thereby reducing feedback latency while maintaining manageable resource allocation through clear segmentation of control channels.
Solution Approach 2:
The patent enables PUCCH resources to serve multiple functions by allowing a single PUCCH resource to carry multiple HARQ-ACK codebooks simultaneously. This multi-functionality approach reduces the need for separate dedicated resources for each codebook, simplifying resource allocation while achieving low-latency feedback transmission.
2Productivity
If PUCCH resources are allocated for multiple HARQ-ACK codebooks in the same slot, then data transmission efficiency is improved, but uplink control channel resource management becomes more complex
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms where PUCCH resources can be flexibly assigned and reconfigured based on traffic conditions and priority requirements. This dynamic approach allows the system to optimize resource utilization for multiple HARQ-ACK codebooks without requiring static complex resource management schemes, thereby improving data transmission efficiency while keeping resource management adaptable and manageable.
3Reliability
If uplink control information is multiplexed on overlapping resources, then transmission reliability is improved, but resource conflict resolution becomes more complex
Solution Approach 1:
The patent introduces priority indicators and resource selection mechanisms that act as intermediaries to resolve conflicts when PUCCH resources overlap. These intermediary elements enable automatic conflict resolution by determining transmission priorities based on pre-configured rules, thereby improving transmission reliability through controlled multiplexing while avoiding the need for complex real-time negotiation or arbitration protocols.
Data Source
AI summary
This application provides a method for multiplexing uplink control information, and relates to the wireless communications field. When a resource of a first uplink control channel that carries first HARQ-ACK information does not overlap a resource of a second uplink control channel that carries second HARQ-ACK information in time domain, but a resource of a third uplink control channel that carries an SR/CSI overlaps both the resource of the first uplink control channel and the resource of the second uplink control channel in time domain, a base station and UE determine, based on a format of the first uplink control channel, a format of the second uplink control channel, and a format of the third uplink control channel, that third HARQ-ACK information and first UCI are multiplexed for transmission, where the third HARQ-ACK information is the first HARQ-ACK information or the second HARQ-ACK information.