Receiver-Side Sensing for Sidelink Resource Collision Reduction
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Solution Overview
Problem
Existing sidelink communication technologies face challenges in efficiently coordinating resource allocation among user equipments (UEs) to minimize collisions and improve communication efficiency, particularly in decentralized resource allocation modes where UEs autonomously select resources.
Innovation Solution
Implementing a sensing mechanism at a receiving UE to identify available resources and adjust measurement thresholds based on availability, enabling the UE to transmit inter-UE coordination information to a transmitting UE, thereby optimizing resource selection and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If decentralized resource allocation is used where UEs autonomously select resources, then communication flexibility and autonomy are improved, but resource collision and inefficiency worsen
Solution Approach 1:
The receiving UE performs sensing and identifies available resources in advance before the transmitting UE needs to allocate resources. The receiving UE transmits this pre-identified resource information to the transmitting UE, allowing the transmitter to select resources that have been verified as available, thereby preventing collisions before they occur.
Solution Approach 2:
The receiving UE provides feedback to the transmitting UE about the actual availability of resources through sensing measurements. This feedback loop allows the transmitting UE to adjust its resource selection based on real-time channel conditions and actual resource availability, improving coordination and reducing collisions.
2Measurement precision
If sensing mechanism is implemented to identify available resources, then resource allocation accuracy is improved, but device complexity and processing overhead worsen
Solution Approach 1:
The receiving UE performs the sensing and resource identification tasks for itself and shares the results with the transmitting UE. This self-service approach allows the receiving UE to leverage its own sensing capabilities and processing power, reducing the overall system complexity while maintaining accurate resource identification.
Solution Approach 2:
The sensing function is merged between the receiving and transmitting UEs, where the receiving UE performs sensing and shares results with the transmitter. This combination allows the system to benefit from the sensing capabilities of both UEs while distributing the processing load, reducing individual device complexity while maintaining high measurement precision.
3Productivity
If measurement threshold is adjusted based on resource availability, then resource selection optimization is improved, but control complexity and signaling overhead worsen
Solution Approach 1:
The receiving UE performs threshold adjustment in advance based on its sensing results and resource availability assessment. By pre-calculating and sharing the adjusted threshold with the transmitting UE, the system optimizes resource selection before the actual transmission occurs, improving efficiency while reducing the complexity of real-time control decisions.
Data Source
AI summary
Apparatus, methods, and computer-readable media for facilitating a SL communication for mode 2 resource allocation are disclosed herein. An example method includes performing sensing on one or more SL resources to identify a first set of available resources. The example method further includes adjusting a first measurement threshold to a second measurement threshold based on a size of the first set of available resources being below an availability threshold. The example method further includes transmitting a sidelink message indicating a second set of available resources based on the second measurement threshold.