V2V Resource Selection via Sensing-Based Exclusion
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Solution Overview
Problem
Vehicle-to-everything (V2X) and Vehicle-to-vehicle (V2V) communications face challenges in autonomous resource selection, particularly in areas with unreliable cellular network coverage, where devices need to autonomously select and distribute frequency resources for effective communication.
Innovation Solution
User Equipment (UE) employs a sensing-based resource selection process, excluding occupied spectrum resources by measuring power and decoding sidelink control information, using iterative power threshold adjustments and priority-based exclusion to identify available resources for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous resource selection is implemented in V2V communications, then communication reliability in areas with limited cellular coverage is improved, but device complexity and difficulty of resource management increase
Solution Approach 1:
The system performs preliminary sensing and resource measurements before actual transmission, building a knowledge base of occupied and available resources in advance. This allows devices to make informed resource selection decisions without complex real-time calculations, resolving the contradiction between reliability and complexity.
Solution Approach 2:
Devices autonomously select their own communication resources by sensing the environment and making decisions based on pre-configured parameters and local measurements. This self-service approach eliminates the need for complex centralized coordination, improving reliability in coverage-limited areas while keeping device complexity manageable through standardized algorithms.
2Measurement precision
If iterative power threshold adjustments are used for resource exclusion, then resource selection accuracy is improved, but processing time and energy consumption increase
Solution Approach 1:
The system performs a limited number of iterative threshold adjustments rather than exhaustive searches. By applying partial action (fewer iterations) with well-chosen initial thresholds based on pre-configuration and sensing, the system achieves sufficient resource selection accuracy without excessive processing time or energy consumption.
3Object-affected harmful factors
If comprehensive sensing and measurement procedures are implemented, then interference minimization is improved, but device complexity and processing requirements increase
Solution Approach 1:
The sensing and measurement procedures are segmented into distinct phases: initial sensing, resource measurement, threshold determination, and exclusion decisions. This segmentation allows the system to comprehensively minimize interference through systematic measurements while keeping device complexity manageable by organizing procedures into modular, standardized steps.
Data Source
AI summary
Selection of time-frequency resources, for autonomous mode operation of V2V UEs, may be performed based on measurements of power transmitted by other UEs and received sidelink control information (SCI) transmitted by the other UEs. Based on these measurements, the UE may selectively exclude spectrum resources, from the set of possible resources, to obtain a final set of resources from which the UE may select resources to use for transmitting. In some implementations, the exclusion of the resources may be based on an iterative operation in which a power threshold value is incrementally modified until a candidate number of resources are available. Additionally, in some implementations, UE priority assignments may be used to obtain the power threshold value for a particular UE.