Multi-Carrier Sidelink Feedback Combining for Lower Overhead
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Solution Overview
Problem
In the Internet of Vehicles system, the challenge of improving transmission reliability in multi-carrier sidelink transmission scenarios is not adequately addressed, particularly when multiple carriers transmit different or the same sidelink data, necessitating effective sidelink feedback mechanisms.
Innovation Solution
A wireless communication method that allows a first terminal to receive and combine sidelink feedback information from multiple carriers onto a reduced number of frequency domain resources, optimizing carrier selection based on criteria such as channel busy rate, measurement results, and transmission times to reduce feedback overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink feedback information is transmitted on each of the N frequency domain resources corresponding to N sidelink data channels, then the feedback reliability is improved, but the feedback overhead increases
Solution Approach 1:
The patent combines feedback information from multiple sidelink data channels (N channels) into a reduced number of feedback channels (M channels, where M < N). Specifically, feedback for multiple data channels is multiplexed onto fewer frequency domain resources, reducing feedback overhead while maintaining reliability through selective carrier feedback mechanisms.
Solution Approach 2:
The patent extracts and prioritizes feedback transmission on selected carriers rather than all carriers. By identifying and selecting M carriers out of N for feedback transmission, the system extracts the most critical feedback information and transmits it on optimized frequency domain resources, reducing unnecessary overhead.
2Productivity
If multiple carriers transmit different sidelink data, then the system throughput is improved, but the complexity of feedback management increases
Solution Approach 1:
The patent segments feedback management by carrier, allowing different feedback strategies for different carriers. Each carrier can be independently configured with feedback parameters, enabling flexible management of multi-carrier feedback while maintaining organized structure through carrier-specific feedback configurations.
Solution Approach 2:
The patent implements a universal feedback framework that works across multiple carriers with different configurations. The same feedback mechanism can handle both carriers transmitting different data (for throughput) and carriers transmitting redundant data (for reliability), providing multi-functional feedback management.
3Reliability
If multiple carriers transmit the same sidelink data, then the transmission reliability is improved, but the feedback overhead increases
Solution Approach 1:
The patent uses copying principles where feedback information from one carrier can be replicated or referenced on other carriers transmitting the same data. Instead of transmitting independent feedback for each redundant data transmission, the system copies or references feedback results across carriers, reducing overhead while maintaining reliability.
Data Source
AI summary
A wireless communication method and a terminal device. The method includes: a first terminal receives, on N frequency domain resources, N sidelink data channels sent by a second terminal, wherein the N frequency domain resources correspond one-to-one to the N sidelink data channels, Nis an integer greater than 1, and the frequency domain resources are carriers or bandwidth parts (BWP); and the first terminal sends, on M frequency domain resources, sidelink feedback information of the N sidelink data channels to the second terminal, where M is a positive integer, and M≤N.