Sidelink Resource Selection With Partial Sensing for Conflict Avoidance
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink resource allocation and sensing mechanisms, particularly in Mode 2 resource allocation schemes, where UEs autonomously select transmission resources without adequate methods to avoid resource conflicts and ensure timely data transmission.
Innovation Solution
Implementing contiguous partial sensing and periodic partial sensing techniques for UEs to monitor resource reservations within a SL resource pool, combined with random resource selection and resource re-evaluation, to optimize resource selection and minimize conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs perform full sensing before resource selection, then resource conflict avoidance is improved, but time consumption and complexity increase
Solution Approach 1:
The patent implements partial sensing where UEs monitor only a subset of resource pool configurations rather than performing full sensing on all resources. This includes monitoring specific sensing occasions and resource reservation intervals selectively, reducing the time and computational complexity while maintaining adequate conflict avoidance capability for aperiodic transmissions
2Speed
If UEs perform contiguous partial sensing, then resource selection timeliness is improved, but sensing accuracy may be reduced
Solution Approach 1:
The patent performs preliminary resource re-evaluation checks before final resource selection by monitoring resource reservation signals in advance. UEs evaluate candidate resources based on pre-collected sensing information and perform quick validation checks, enabling timely resource selection for aperiodic data while maintaining adequate sensing accuracy through targeted monitoring of critical resource intervals
3Loss of energy
If UEs autonomously select resources in Mode 2, then network overhead is reduced, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where UEs monitor resource reservation signals from other UEs and adjust their resource selection based on observed usage patterns. This includes detecting reserved resources through sensing occasions and modifying candidate resource selection accordingly, improving resource allocation efficiency through distributed feedback while maintaining autonomous operation and minimizing network overhead
Data Source
AI summary
Systems and methods for sidelink (SL) resource pool resource use by a user equipment (UE) are disclosed herein. In some embodiments, when the UE performs contiguous partial sensing in addition to periodic partial sensing, the UE performs one of resource selection and resource re-evaluation based a size of a time gap between a slot where the UE has SL data and a first slot of periodic-based candidate slots within a resource selection window. In other embodiments, the UE performs contiguous partial sensing without additional periodic partial sensing in the case where a packet delay budget (PDB) for the SL data is greater than a threshold. In some embodiments, the UE performs periodic partial sensing for resource re-evaluation and/or resource pre-emption according to a set of periodicity values Preserve,re-ev (and optionally period definition data Kre-ev). Restrictions on the use of random resource selection by the UE are also described.