Sidelink Resource Allocation via HARQ Feedback Thresholds
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Solution Overview
Problem
Current sidelink resource allocation methods in wireless communication networks face inefficiencies in adapting to changing transmission conditions, leading to suboptimal performance due to fixed resource allocation strategies that do not effectively respond to hybrid automatic repeat request (HARQ) feedback.
Innovation Solution
A method where user equipment (UE) determines radio resources for sidelink transport blocks based on HARQ feedback, allowing switching between different resource allocation processes to optimize resource usage, with the UE selecting radio resources for sidelink transport blocks based on the HARQ feedback, including negative and positive acknowledgments, to dynamically adjust resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed sidelink resource allocation process is used, then the device complexity is reduced, but the adaptability to changing transmission conditions deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation by enabling the UE to switch between different resource allocation processes (first and second processes) based on real-time HARQ feedback. The system transitions from a fixed allocation mechanism to a dynamic one where the selection of allocation process is determined by transmission performance indicators, allowing adaptation to changing channel conditions without requiring complex continuous adjustment mechanisms.
Solution Approach 2:
The patent utilizes HARQ feedback as a control signal to determine which resource allocation process to use. The UE monitors the HARQ feedback (ACK/NACK ratios) and switches allocation processes accordingly. This feedback mechanism enables the system to adapt to transmission conditions by using simple binary feedback signals rather than requiring complex continuous feedback or manual configuration.
2Productivity
If dynamic resource allocation switching is implemented, then the resource allocation efficiency is improved, but the device complexity increases
Solution Approach 1:
The system uses HARQ feedback (ACK/NACK signals) as the control mechanism for switching between resource allocation processes. This simple feedback approach enables efficient dynamic adaptation without requiring complex decision-making algorithms or continuous monitoring of multiple parameters. The UE only needs to count the number of ACKs and NACKs to determine when to switch processes.
Solution Approach 2:
The patent changes the allocation process selection parameter based on transmission performance metrics (HARQ feedback). By thresholding the ACK/NACK ratio, the system transitions between discrete allocation processes in response to measurable performance changes. This parameter-based switching achieves efficient resource utilization while keeping the control logic simple and implementable.
Data Source
AI summary
A system, method and apparatus for mobile communications including sidelink transmissions is provided. A user equipment (UE) determines based on a partial sensing resource allocation process associated with a first window size, first radio resources for one or more first sidelink transport blocks. The UE transmits the one or more first sidelink transport blocks based on the first radio resources. The UE receives hybrid automatic repeat request (HARQ) feedback based on a first number of number of negative acknowledgements (NACKs) and a second number of positive acknowledgements (ACKs). Based on application of a threshold, the UE determines second radio resources for one or more second sidelink transport blocks. The UE transmits the one or more second sidelink transport blocks based on the second radio resources.