Sidelink HARQ Resource Timing After Feedback Demodulation
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Solution Overview
Problem
In sidelink (SL) transport block (TB) transmission based on hybrid automatic repeat request (HARQ) feedback, there is a lack of guarantee that resources for next PSSCH transmission appear after the transmit user equipment (TX UE) demodulates the feedback information, leading to resource waste and redundant feedback.
Innovation Solution
The method involves determining that the time domain position of a second target resource for a transport block is after the time domain position of feedback information, ensuring a transmission interval satisfies the HARQ round-trip time (RTT) condition, and performing transmission control or blind retransmission when the interval does not meet this condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources for next PSSCH transmission are allocated without ensuring they appear after feedback information demodulation, then resource allocation flexibility is improved, but resource wastage and redundant feedback occur
Solution Approach 1:
The patent applies preliminary action by determining the time domain position of the second target resource in advance to ensure it occurs after the feedback information demodulation time point. This proactive resource positioning prevents resource conflicts and wastage before they occur, while maintaining allocation flexibility through the resource determination mechanism.
2Productivity
If resources for next PSSCH transmission are allocated without ensuring they appear after feedback information demodulation, then resource allocation speed is improved, but redundant feedback information is generated
Solution Approach 1:
The patent determines the time domain position of transmission resources in advance to ensure proper sequencing with feedback demodulation. This preliminary resource positioning prevents the generation of redundant feedback by ensuring resources are only allocated when valid feedback can be received, thereby maintaining allocation speed while eliminating information redundancy.
3Productivity
If transmission interval between resources does not satisfy HARQ RTT condition, then transmission efficiency is improved, but feedback demodulation cannot be completed in time
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmission interval between resources to satisfy the HARQ RTT condition. By modifying the time domain parameters of resource allocation based on feedback demodulation requirements, the system maintains reliable feedback completion while optimizing transmission efficiency through appropriate interval selection.
Data Source
AI summary
The present disclosure provides a resource determining and transmission method, and a transmit end. The resource determining method includes: determining that a time domain position of a second target resource of a first TB is after a time domain position in which feedback information corresponding to a first target resource is located. The resource transmission method includes: during second TB transmission, in a case that a transmission interval between a third target resource and a fourth target resource of a second TB does not satisfy an HARQ RTT condition, perform transmission control, so that the transmission interval between transmission resources in the second TB transmission satisfies the HARQ RTT condition.