Assisted Sidelink Resource Selection for Hidden-Node V2X Conflicts
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Solution Overview
Problem
Existing sidelink communication technologies face challenges in resource allocation due to hidden nodes and exposed nodes, leading to conflicts and low resource utilization, especially in vehicle-to-everything (V2X) scenarios, as user equipment cannot accurately perceive reference signals from all nodes, resulting in inefficient resource selection.
Innovation Solution
A method where user equipment A assists user equipment B by providing an assistance resource set through an assistance request and report, optimizing the conditions, steps, and timing sequences for resource selection to reduce conflicts and improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If user equipment selects resources autonomously based on local perception, then resource selection speed is improved, but resource utilization efficiency deteriorates due to hidden nodes and exposed nodes
Solution Approach 1:
The patent introduces a network device as an intermediary that collects resource status information from multiple user equipments and provides assistance information to guide resource selection. This mediator resolves the contradiction by enabling faster local decision-making while ensuring global resource utilization efficiency through network-coordinated assistance information.
Solution Approach 2:
The network device performs preliminary actions by pre-collecting resource status information and pre-calculating assistance information before user equipments need to make resource selection decisions. This allows user equipments to quickly select resources based on pre-prepared assistance information, achieving both fast selection and efficient utilization.
2Reliability
If user equipment increases resource perception range to avoid hidden nodes, then transmission reliability is improved, but system complexity deteriorates
Solution Approach 1:
The patent merges the resource perception capabilities of multiple user equipments through the network device, which collects resource status information from multiple sources and consolidates it into assistance information. This combining approach achieves comprehensive resource awareness (improving reliability) without requiring individual equipments to independently monitor extensive ranges (reducing complexity).
Data Source
AI summary
A method for selecting a resource is performed by a first device, and includes: sending an assistance request for requesting a second device to provide an assistance resource set; and receiving an assistance resource report from the second device, wherein the assistance resource report indicates the assistance resource set provided by the second device.