Receiver-Side Sidelink Sensing for Inter-UE Resource Coordination
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Solution Overview
Problem
Existing sidelink communication technologies face challenges in efficiently coordinating resource allocation among user equipments (UEs) to minimize resource collisions and improve communication efficiency, particularly in decentralized resource allocation modes.
Innovation Solution
UEs perform sensing on SL resources to identify available resources, adjust measurement thresholds based on resource availability, and transmit sidelink messages indicating suitable resources to ensure consistent resource availability for transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UEs use fixed measurement thresholds for sensing SL resources, then the sensing process is simple and fast, but the resource availability reporting is inconsistent when resource conditions change
Solution Approach 1:
The measurement threshold is changed from a fixed value to a dynamic value that adapts based on the sensed resource availability. When the number of available resources falls below a predefined threshold, the measurement threshold is adjusted to a second value, enabling the system to dynamically respond to changing resource conditions and provide more consistent availability reporting.
Solution Approach 2:
The system implements feedback by monitoring the number of available SL resources and using this information to adjust the measurement threshold. This closed-loop approach ensures that the threshold adapts to actual resource conditions, improving the consistency of resource availability reporting while maintaining relatively simple implementation through predefined threshold values.
2Reliability
If UEs perform detailed sensing on all SL resources, then resource allocation coordination is improved, but the processing time and complexity increase
Solution Approach 1:
Each UE independently performs sensing on SL resources and autonomously determines available resources based on predefined criteria. This self-service approach eliminates the need for complex centralized coordination while maintaining reliable resource allocation, as each device can quickly assess resource availability using simple comparison operations rather than extensive processing.
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.