SPS PDSCH HARQ-ACK Reporting for Lower Uplink Feedback Overhead
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in reporting Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information for Semi-Persistent Scheduling Physical Downlink Shared Channel (SPS PDSCH), leading to resource overhead and performance issues.
Innovation Solution
A method and apparatus for determining HARQ-ACK bits for SPS PDSCH by utilizing RRC signaling and information blocks to identify symbols available for uplink transmission, reducing unnecessary feedback and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK feedback is reported for all SPS PDSCH configurations, then feedback completeness is improved, but feedback overhead increases
Solution Approach 1:
The patent extracts and removes unnecessary HARQ-ACK feedback bits corresponding to first-type SPS PDSCH configurations from the feedback report. By identifying and excluding these redundant acknowledgments, the system reduces feedback overhead while maintaining essential feedback completeness for target SPS PDSCH configurations.
Solution Approach 2:
Instead of reporting HARQ-ACK for all SPS PDSCH configurations (excessive action), the patent implements partial reporting by selectively including only target SPS PDSCH configurations in the feedback. This partial action approach reduces unnecessary feedback while ensuring critical acknowledgments are transmitted.
2Quantity of substance
If HARQ-ACK feedback is reduced for SPS PDSCH, then resource overhead is reduced, but feedback performance may be affected
Solution Approach 1:
The patent applies local quality by differentiating between first-type SPS PDSCH configurations (which do not require feedback) and target SPS PDSCH configurations (which require feedback). This localized differentiation ensures that feedback is provided only where necessary, optimizing resource usage while maintaining feedback performance for critical configurations.
Solution Approach 2:
The patent implements a selective feedback mechanism where the UE determines which SPS PDSCH configurations require HARQ-ACK feedback based on their type. This intelligent feedback approach ensures that essential acknowledgments are transmitted while avoiding redundant feedback, thus maintaining feedback performance while reducing overhead.
3Reliability
If uplink resources are allocated for all potential HARQ-ACK feedback, then feedback reliability is improved, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic resource allocation for HARQ-ACK feedback by adjusting the feedback report content based on the actual SPS PDSCH configurations that require acknowledgment. This dynamic approach allows the system to allocate uplink resources efficiently, providing sufficient capacity for reliable feedback transmission while avoiding waste from pre-allocating resources for all possible configurations.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus used in a node for wireless communication. A first receiver receives first RRC signaling and a first information block, and a first transmitter sends a first HARQ-ACK bit block on a first PUCCH, the first HARQ-ACK bit block including at least one HARQ-ACK bit for a first SPS PDSCH configuration, wherein a target HARQ-ACK bit is a HARQ-ACK bit included in the first HARQ-ACK bit block, a first-type symbol is used for determining that the first HARQ-ACK bit block includes the target HARQ-ACK bit, and the first-type symbol is a symbol that is indicated as a downlink symbol by the first RRC signaling and determined, by the first information block, to be available for uplink transmission; and the target HARQ-ACK bit is a HARQ-ACK bit for a target SPS PDSCH, the target SPS PDSCH is an SPS PDSCH that is associated with the first SPS PDSCH configuration and is an SPS PDSCH other than a first-type SPS PDSCH, and the first-type SPS PDSCH is an SPS PDSCH overlapping the first-type symbol.