PUCCH Resource Overlap Handling in V2X Feedback
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Solution Overview
Problem
In V2X communication scenarios, particularly with NR technology, the overlap of PUCCH resources for transmitting different types of HARQ feedback information poses a challenge in selecting an appropriate resource for combined transmission, affecting communication efficiency and reliability.
Innovation Solution
A method is introduced to determine a third PUCCH resource from either the first or second resource set based on configuration information, receiving times, or priorities, allowing for the combined transmission of first and second feedback information, thereby resolving the resource overlap issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH resources are allocated for different HARQ feedback types, then feedback reliability is improved, but resource overlap occurs causing transmission conflicts
Solution Approach 1:
The patent merges multiple HARQ feedback types (sidelink HARQ-ACK and downlink HARQ-ACK) into a single PUCCH resource for combined transmission. When resource overlap is detected between first PUCCH resource (for sidelink feedback) and second PUCCH resource (for downlink feedback), the terminal selects one PUCCH resource to transmit both feedback types together, eliminating resource conflicts while maintaining feedback reliability.
2Productivity
If PUCCH resources are combined for overlapping feedback, then resource efficiency is improved, but feedback information may be lost
Solution Approach 1:
The patent applies preliminary action by detecting resource overlap between first PUCCH resource and second PUCCH resource before transmission occurs. The terminal determines in advance whether to select the first or second PUCCH resource for combined feedback transmission, and prepares the combined feedback information accordingly. This advance detection and preparation ensures that no feedback information is lost while achieving efficient resource utilization.
3Measurement precision
If multiple PUCCH resources are configured for different feedback types, then feedback accuracy is improved, but resource selection complexity increases
Solution Approach 1:
The patent changes the resource selection parameter from independent selection of separate PUCCH resources to unified selection based on resource overlap detection. The terminal monitors the time-domain overlap parameter between first and second PUCCH resources, and dynamically adjusts the resource selection strategy: when overlap is detected, select one resource for combined transmission; when no overlap, use separate resources. This parameter-based approach maintains feedback accuracy while simplifying the selection process.
Data Source
AI summary
Feedback methods, feedback apparatuses and storage mediums are provided. A feedback method includes that: a terminal determines a first physical uplink control channel resource for transmitting first feedback information and a second physical uplink control channel resource for transmitting second feedback information are overlapped in time domain, where the first physical uplink control channel resource corresponds to a first resource set and the second physical uplink control channel resource corresponds to a second resource set; the terminal determines a third physical uplink control channel resource from the first resource set or the second resource set, and transmits the first feedback information and the second feedback information in a combination by the third physical uplink control channel resource.