Uplink Control Information Transmission for 5G HARQ-ACK Feedback
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Solution Overview
Problem
Current 5G mobile communication technologies face challenges in effectively supporting low-latency services, particularly in transmitting Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information, especially when multiple Physical Uplink Control Channels (PUCCHs) or Physical Uplink Shared Channels (PUSCHs) need to carry HARQ-ACKs of different Physical Downlink Shared Channels (PDSCHs within one slot.
Innovation Solution
A method and device for transmitting uplink control information, which involves receiving a Physical Downlink Shared Channel (PDSCH), determining Physical Uplink Control Channel (PUCCH) resources for feeding back HARQ-ACK information based on HARQ-ACK timing, time domain duration of scheduling units in both downlink and uplink bandwidth parts, and PUCCH resource indication information, allowing for efficient allocation of HARQ-ACK codebooks and transmission on PUCCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUCCHs or PUSCHs are used to carry HARQ-ACKs of different PDSCHs within one slot, then the capability to support low-latency services is improved, but the system complexity and resource allocation difficulty increase
Solution Approach 1:
The patent segments the HARQ-ACK feedback process by dividing it into multiple PUCCH/PUSCH transmissions within a single slot, each carrying HARQ-ACK for specific PDSCHs. This segmentation allows parallel feedback channels to operate simultaneously, reducing overall latency while maintaining manageable complexity through structured resource allocation
Solution Approach 2:
The patent implements dynamic resource allocation where PUCCH/PUSCH resources are flexibly assigned based on real-time scheduling requirements. The system dynamically determines which uplink channels carry HARQ-ACK for which downlink channels, enabling adaptive optimization for low-latency services without requiring fixed complex resource tables
2Speed
If HARQ-ACK timing is optimized for low latency, then the feedback speed is improved, but the timing synchronization and resource coordination become more difficult
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple PUCCH/PUSCH resources and their associated timing relationships before actual data transmission. This allows the system to rapidly assign appropriate feedback channels and timing without complex real-time calculations, achieving low latency while simplifying operational complexity
Solution Approach 2:
The patent changes the timing parameters of HARQ-ACK feedback by allowing multiple different K1 values (time offsets between PDSCH and HARQ-ACK) to be configured. This enables flexible timing adjustment where different PDSCHs can have different feedback delays, optimizing for low latency while maintaining coordination through parameterized resource configuration
Data Source
AI summary
A method for transmitting uplink control information is provided. The method includes receiving a Physical Downlink Shared Channel (PDSCH), determining Physical Uplink Control Channel (PUCCH) resources for feeding back Hybrid Automatic repeat Request Acknowledgement (HARQ-ACK) information of the PDSCH, and transmitting a HARQ-ACK of the PDSCH on the PUCCH resources according to at least one of HARQ-ACK timing information, the time domain duration of scheduling unit in a downlink bandwidth part and an uplink bandwidth part, or PUCCH resource indication information. The embodiments of the application further propose a corresponding user equipment and a corresponding computer storage medium.