NR V2X Sidelink Burst Resource Reselection Under Pre-Emption
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Solution Overview
Problem
The frequent reselection of resources due to applying the same re-evaluation and pre-emption rules for burst resources as non-burst resources in sidelink (SL) communication increases battery consumption and undermines the reliability of SL communication.
Innovation Solution
A method and device for performing wireless communication that involves obtaining a configuration related to a resource pool, performing sensing to select sidelink resources, triggering re-evaluation or pre-emption for specific resources, and performing a reselection procedure based on the evaluation or pre-emption results to exclude unsuitable resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same re-evaluation rule or pre-emption rule for normal resources is applied to burst resources, then resource allocation consistency is maintained, but frequent resource reselection occurs which increases battery consumption
Solution Approach 1:
The patent applies different re-evaluation and pre-emption rules specifically tailored for burst resources compared to normal resources. This local differentiation allows burst resources to have relaxed re-evaluation criteria, reducing unnecessary reselection events and thereby lowering battery consumption while maintaining overall system reliability.
Solution Approach 2:
The patent introduces dynamic adjustment mechanisms where re-evaluation thresholds and pre-emption conditions are adapted based on resource type (burst vs. normal). This dynamic approach enables the system to respond appropriately to different resource characteristics, preventing excessive reselection for burst resources while maintaining strict control for normal resources.
2Productivity
If frequent resource reselection is performed to maintain resource allocation consistency, then resource utilization efficiency is improved, but battery consumption increases
Solution Approach 1:
The patent implements partial re-evaluation where only certain resources or certain conditions trigger full reselection. For burst resources, instead of performing complete reselection every time, the system performs partial checks that are sufficient to maintain efficiency without the excessive energy cost of full reselection procedures.
Solution Approach 2:
The patent enables UEs to autonomously determine when re-evaluation is necessary based on local conditions and resource characteristics. This self-service mechanism allows UEs to avoid unnecessary reselection events that would consume battery power, while still maintaining adequate resource utilization through intelligent local decision-making.
3Reliability
If re-evaluation and pre-emption procedures are implemented for aggregated resources, then communication reliability is enhanced, but system complexity increases
Solution Approach 1:
The patent segments the re-evaluation and pre-emption procedures into distinct modules that can be independently applied to different resource types. This segmentation allows the system to implement complex reliability mechanisms for burst resources without overwhelming the overall system, as each segment can be managed separately with appropriate complexity levels.
Solution Approach 2:
The patent designs the re-evaluation and pre-emption framework to be universally applicable across different resource types through a unified interface. While the underlying mechanisms can be complex, the universal design allows the same basic framework to handle both burst and normal resources, reducing the need for entirely separate complex systems.
Data Source
AI summary
Provided are a method by which a first device performs wireless communication, and a device supporting same. The method may comprise the steps of: obtaining a configuration related to a resource pool; performing sensing to select a sidelink (SL) resource in the resource pool; determining a first burst resource including a plurality of resources within a selection window on the basis of the sensing; triggering re-evaluation or pre-emption of at least one resource from among the plurality of resources included in the first burst resource; determining, based on the re-evaluation or the preemption, to exclude a first resource from among the at least one resource included in the first burst resource; and performing a reselection procedure for the first burst resource on the basis of the determination to exclude the first resource.