SPS Configuration Time Interval Determination for HARQ-ACK
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Solution Overview
Problem
The existing Semi-Persistent Scheduling (SPS) downlink transmission mode in related arts faces challenges in configuring multiple SPS configurations for User Equipment (UE), leading to inflexible time intervals for Hybrid Automatic Repeat Request (HARQ)-ACK feedback, which is inadequate for services requiring low delay and high flexibility.
Innovation Solution
The proposed method involves a terminal receiving multiple SPS configurations with different periods and determining a time interval between the reception of a Physical Downlink Shared Channel (PDSCH) and the sending of an HARQ-ACK based on the corresponding period of each SPS configuration, where the period is positively correlated with the time interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SPS configurations are configured for UE, then adaptability to different services is improved, but PUCCH resource overlap and scheduling complexity increase
Solution Approach 1:
The patent segments the SPS configurations into multiple groups, where each group shares the same PUCCH resource. This segmentation resolves the conflict by allowing multiple SPS configurations to coexist without causing PUCCH resource overlap, while still providing adaptability to different services through the grouped structure.
Solution Approach 2:
The patent introduces dynamic adjustment mechanisms for time intervals and PUCCH resource selection based on the specific service requirements and configuration groups. This allows the system to adapt dynamically to different service scenarios while maintaining manageable scheduling complexity through the grouped configuration approach.
2Adaptability or versatility
If multiple SPS configurations with different periods are used, then flexibility for low delay services is improved, but time interval determination complexity increases
Solution Approach 1:
The patent applies different time interval determination rules to different SPS configuration groups based on their specific characteristics. Each group can have optimized time interval settings suited to its service requirements, reducing overall complexity while maintaining flexibility for low delay services.
Solution Approach 2:
The patent changes the time interval parameter dynamically based on the SPS configuration group and service requirements. By adjusting time intervals according to different periods and service types, the system achieves flexibility for low delay services while managing determination complexity through structured parameter management.
3Reliability
If PUCCH resources are configured for multiple SPS configurations, then HARQ-ACK feedback capability is improved, but resource overlap in time domain occurs
Solution Approach 1:
The patent segments SPS configurations into groups that share common PUCCH resources, and establishes rules to prevent overlap within each group. This segmentation approach maintains HARQ-ACK feedback capability for multiple configurations while avoiding time domain resource overlap through structured resource allocation.
Solution Approach 2:
The patent introduces configuration groups as an intermediary layer between individual SPS configurations and PUCCH resources. This intermediary structure enables multiple configurations to access feedback resources without direct overlap, as the group level mediates resource allocation and conflict resolution.
Data Source
AI summary
A method for determining time interval, a time interval indication method, and an HARQ-ACK sending method. The method for determining time interval includes: receiving, by a terminal, a plurality of SPS configurations, different SPS configurations having different periods; and determining, by a terminal, a time interval between receiving time of a PDSCH of each of the SPS configurations and sending time of an HARQ-ACK for the PDSCH according to a corresponding period in each of the SPS configurations, the corresponding period is positively correlated with the time interval.