V2X Partial Sensing Resource Re-evaluation
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Solution Overview
Problem
In the context of Vehicle to Everything (V2X) systems, terminal devices performing resource selection based on partial sensing face challenges with insufficient candidate resources during resource re-evaluation and preemption evaluation, leading to potential interference and system performance degradation.
Innovation Solution
The method involves performing resource re-evaluation and preemption evaluation in a first target time unit that is earlier and different from a second target time unit used for full sensing, and expanding candidate resources in the second candidate resource set to address insufficient resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If resource selection is performed based on partial sensing to reduce energy consumption, then energy efficiency is improved, but the number of available candidate resources becomes insufficient
Solution Approach 1:
The resource selection process is segmented into two distinct phases: partial sensing phase (performed in a first target time unit) and re-evaluation/preemption evaluation phase (performed in a second target time unit). This segmentation allows the terminal to perform limited sensing initially to save energy, then expand the candidate resource set later when more resources become available for evaluation, thus resolving the contradiction between energy efficiency and resource availability.
2Device complexity
If only time-frequency resources within a specific time unit set are used to generate candidate resource set in partial sensing, then sensing complexity is reduced, but candidate resource sufficiency deteriorates
Solution Approach 1:
The terminal performs preliminary partial sensing in the first target time unit to identify initial candidate resources with reduced complexity. Then, in the second target time unit, the terminal performs re-evaluation and preemption evaluation to expand the candidate resource set. This preliminary action approach allows the system to start with a manageable sensing scope while ultimately achieving sufficient candidate resources through subsequent expansion.
Data Source
AI summary
A method for evaluating a time-frequency resource to be used for transmission, includes: performing, based on partial sensing, at least one of resource re-evaluation or resource preemption evaluation for the time-frequency resource in a first target time unit, wherein the first target time unit is different from a second target time unit, the first target time unit is earlier than the second target time unit, and the second target time unit is a time unit which is used when performing the at least one of resource re-evaluation or resource preemption evaluation for the time-frequency resource based on sensing.