Beam-Based Sidelink Resource Selection for High-Frequency V2X
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sidelink communication technologies face challenges in efficiently utilizing beamforming-based resource allocation and communication methods, particularly in high-frequency bands, which are necessary for reliable data transmission in Vehicle-to-Everything (V2X) communication.
Innovation Solution
A method and apparatus for beam-based sidelink communication that involves determining a beam candidate set, selecting beams and resources for sidelink communication, and periodically updating beams based on signal strength, while considering preferred and non-preferred beam sets, channel busy ratios, and resource sensing thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming technique is used in high-frequency bands for sidelink communication, then data transmission reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct phases: resource sensing phase where the transmitting terminal monitors channel conditions, resource selection phase where candidate resources are identified based on sensing results, and resource confirmation phase where the receiving terminal provides feedback. This segmentation reduces the complexity of beamforming-based resource allocation by breaking down the complex process into manageable, sequential steps that can be independently optimized.
Solution Approach 2:
The patent implements preliminary resource sensing and beam training before actual data transmission. The transmitting terminal performs resource sensing in advance to identify suitable time-frequency resources and beam directions. The receiving terminal also performs preliminary beam training to determine optimal receiving beams. These preliminary actions ensure that when data transmission occurs, the beamforming parameters are already optimized, reducing real-time complexity while maintaining high reliability.
2Reliability
If multiple beams are evaluated for resource selection, then communication quality is improved, but processing time increases
Solution Approach 1:
The patent applies partial action by evaluating only a subset of available beams for resource selection rather than exhaustively testing all possible beams. The transmitting terminal identifies a limited set of candidate beams based on preliminary scanning and channel conditions, then performs detailed evaluation only on these candidates. This approach achieves sufficient communication quality by focusing resources on the most promising beams while significantly reducing processing time compared to exhaustive beam evaluation.
Solution Approach 2:
The patent implements skipping mechanisms in the beam evaluation process by using threshold-based filtering. During resource sensing, beams that fall below certain signal strength or quality thresholds are quickly discarded without further detailed evaluation. This allows the system to rapidly eliminate poor beam candidates and focus processing time on promising beams, thereby reducing overall processing time while maintaining communication quality through thorough evaluation of the remaining candidates.
3Measurement precision
If resource sensing is performed for each beam, then resource allocation accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent merges the resource sensing operations across multiple beams by having the transmitting terminal perform a unified resource sensing procedure that simultaneously evaluates channel conditions for multiple candidate beams. Instead of separately sensing resources for each beam (which would multiply energy consumption), the system combines the sensing operations to gather channel state information for multiple beams in a single coordinated process. This merging approach maintains resource allocation accuracy by evaluating all candidate beams while significantly reducing the cumulative energy expenditure compared to independent sensing for each beam.
Data Source
AI summary
A method of a transmitting terminal may include: determining a beam candidate set including two or more beams usable for sidelink communication with a receiving terminal from among a plurality of beams that can be beam-formed; determining a resource set for each beam within the beam candidate set through resource sensing, such that the resource set has candidate resources equal to or greater than a predetermined number of candidate resources; selecting a beam and a resource to be used for sidelink communication with the receiving terminal based on the beam candidate set and the resource set; and transmitting sidelink data to the receiving terminal using the selected beam and the selected resource.