Sidelink Resource Selection Using Leakage-Aware Interference Sensing
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Solution Overview
Problem
In Mode 2 of 3GPP sidelink communication, power leakage occurs on available resources due to overlapping reservations by other terminals, leading to interference and reduced data transmission reliability.
Innovation Solution
A resource selection method that determines candidate resources by considering interference power thresholds and periodic extensions, avoiding resources with excessive interference to improve transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal selects resources through sensing and selection in Mode 2, then resource allocation flexibility is improved, but interference from power leakage on selected resources increases
Solution Approach 1:
The terminal performs preliminary sensing in a sensing window before selecting resources in a selection window. By detecting resources reserved by other terminals in advance and excluding them from the candidate resource set, the terminal prevents power leakage interference before it occurs, thus maintaining both resource allocation flexibility and reducing interference.
Solution Approach 2:
The patent converts the harmful effect of power leakage into a beneficial sensing mechanism. By sensing resources reserved by other terminals and using this information to exclude interfering resources from the candidate set, the terminal transforms potential interference into useful knowledge for making better resource selection decisions.
2Object-affected harmful factors
If a terminal excludes resources reserved by other terminals from candidate resource set, then interference is reduced, but resource selection complexity increases
Solution Approach 1:
The resource selection process is segmented into distinct phases: sensing window for detecting reserved resources, candidate resource set formation by excluding interfering resources, and final resource selection. This segmentation simplifies the overall complexity by breaking down the decision-making process into manageable steps with clear criteria for each phase.
Solution Approach 2:
The terminal performs preliminary sensing and exclusion actions before final resource selection. By pre-identifying and excluding resources that would cause interference in the sensing window, the terminal reduces the number of candidates for final selection, thereby simplifying the overall resource selection process while ensuring low interference.
Data Source
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AI summary
This application provides a resource selection method and apparatus, and relates to the communication field, so that interference on a resource that is determined by a terminal and that is used for data transmission is small or does not exist, thereby improving transmission reliability. The method includes: A first terminal determines a candidate resource set, where the candidate resource set does not include a first resource. Interference power on a second resource associated with the first resource is greater than or equal to a first threshold. A periodic extension resource of the second resource overlaps a resource set corresponding to the first resource, and the periodic extension resource of the second resource is determined based on the second resource and a first period of a second terminal. A time domain location of the second resource overlaps a time domain location of a third resource, and a frequency domain location of the second resource does not overlap a frequency domain location of the third resource. Interference power on the second resource is determined based on power that a signal carried on the third resource leaks on the second resource, the third resource is a resource in a sensing window, and the signal carried on the third resource is a PSCCH and/or a PSSCH of the second terminal.