Uplink Feedback Transmission for Semi-Persistent Scheduling HARQ-ACKs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In semi-persistent scheduling (SPS) systems, transmitting multiple hybrid automatic repeat request (HARQ) acknowledgments (HARQ-ACKs) in a single time-domain unit can lead to inefficiencies due to resource unavailability, necessitating a method to optimize the transmission of these acknowledgments.
Innovation Solution
A method is provided where a terminal determines a physical uplink control channel (PUCCH) resource for carrying multiple SPS HARQ-ACKs, classifying them into sets based on deferral status, and determining whether the time-domain unit is suitable for transmission, thereby optimizing the transmission opportunity and improving system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple SPS HARQ-ACKs are transmitted in one time-domain unit, then system efficiency is improved through consolidated feedback, but resource availability becomes constrained leading to transmission failures
Solution Approach 1:
The patent segments multiple SPS HARQ-ACKs into two distinct sets (first SPS HARQ-ACK set and second SPS HARQ-ACK set) based on their association with different SPS PDSCH configurations. This segmentation allows the terminal to determine whether the time-domain unit is appropriate for transmitting the first set, and if not, defer to transmitting the second set in a subsequent time-domain unit, thereby resolving the resource availability constraint while maintaining system efficiency.
2Reliability
If PUCCH resource is unavailable for transmitting multiple SPS HARQ-ACKs, then transmission reliability is maintained by avoiding resource conflicts, but transmission opportunity is reduced
Solution Approach 1:
The patent implements a dynamic transmission strategy where the terminal determines whether the current time-domain unit is suitable for transmitting the first SPS HARQ-ACK set based on PUCCH resource availability. If the resource is unavailable, the terminal dynamically adjusts by deferring transmission to the second SPS HARQ-ACK set in a subsequent time-domain unit, thus maintaining reliability while minimizing time loss through flexible adaptation to resource conditions.
Data Source
AI summary
Provided are a method and apparatus for transmitting uplink feedback information. The method includes: a terminal determines a first PUCCH resource in a first time-domain unit, the first PUCCH resource being configured for carrying multiple SPS HARQ-ACKs, and the multiple SPS HARQ-ACKs including at least one SPS HARQ-ACK in a first SPS HARQ-ACK set and at least one SPS HARQ-ACK in a second SPS HARQ-ACK set; and when the first PUCCH resource is unavailable, the terminal determines whether the first time-domain unit is a time-domain unit for transmitting the first SPS HARQ-ACK set.