eMBB HARQ-ACK Transmission Overlap Handling in 5G NR
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Solution Overview
Problem
In 5G NR communication, the overlap between PUCCH and PUSCH resources can cause eMBB HARQ-ACK loss, leading to unnecessary retransmission of eMBB service data due to the dropping or punching of eMBB PUSCH resources, especially when URLLC HARQ-ACK overlaps with eMBB PUSCH resources.
Innovation Solution
The method involves determining the time domain resource positions of PUCCH and PUSCH resources for eMBB and URLLC HARQ-ACKs, and if there is no overlap between URLLC and eMBB HARQ-ACKs, the eMBB HARQ-ACK is transmitted on the PUCCH resource instead of using the eMBB PUSCH resource, reducing the likelihood of eMBB HARQ-ACK loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If eMBB HARQ-ACK is transmitted on eMBB PUSCH resource, then resource utilization is improved, but eMBB HARQ-ACK loss occurs when URLLC HARQ-ACK overlaps with eMBB PUSCH
Solution Approach 1:
The patent segments the HARQ-ACK transmission by separating eMBB HARQ-ACK and URLLC HARQ-ACK into different transmission paths. When URLLC HARQ-ACK overlaps with eMBB PUSCH in time domain, the eMBB HARQ-ACK is transmitted on dedicated PUCCH resources while URLLC HARQ-ACK is transmitted on PUSCH resources, preventing mutual interference and ensuring both services maintain their required reliability levels.
2Adaptability or versatility
If PUCCH resource for eMBB HARQ-ACK overlaps with eMBB PUSCH resource, then transmission flexibility is improved, but HARQ-ACK loss occurs due to resource dropping
Solution Approach 1:
The patent introduces a determination mechanism as an intermediary that checks for overlaps between PUCCH resources carrying HARQ-ACK and PUSCH resources before transmission. When an overlap is detected, the system selects appropriate transmission resources, preventing the dropping of eMBB HARQ-ACK and ensuring reliable transmission while maintaining flexibility in resource allocation.
3Speed
If URLLC service is prioritized with shorter delay, then URLLC performance is improved, but eMBB HARQ-ACK may be lost due to resource conflicts
Solution Approach 1:
The patent applies local quality by providing different transmission guarantees for different service types. URLLC services receive prioritized handling with dedicated PUSCH resources for HARQ-ACK transmission when needed, while eMBB services are directed to use PUCCH resources. This localized differentiation ensures URLLC meets its strict delay requirements while eMBB maintains its HARQ-ACK transmission reliability.
Data Source
AI summary
The present disclosure provides a method for transmitting a HARQ-ACK and a communication device. The method includes: in a case that there is an overlap between a PUCCH resource carrying an eMBB HARQ-ACK and an eMBB PUSCH resource in a time domain, in response to determining, before a predetermined moment that, there is an overlap between the PUCCH resource carrying an URLLC HARQ-ACK and the eMBB PUSCH resource in the time domain while there is no overlap between the PUCCH resource carrying the URLLC HARQ-ACK and the PUCCH resource of the eMBB HARQ-ACK in the time domain, the eMBB HARQ-ACK on the PUCCH resource of the eMBB HARQ-ACK is transmitted, wherein the predetermined moment is an earlier one of a time domain start moment of the eMBB PUSCH resource and a time domain start moment of the PUCCH resource carrying the eMBB HARQ-ACK.