Decentralized V2V Power Control via Road Alignment Classification
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Solution Overview
Problem
Existing vehicle-to-vehicle communication power control algorithms fail to account for driving safety risks, leading to compromised communication reliability, especially in congested areas like intersections, and lack stability due to synchronized power adjustments by vehicles.
Innovation Solution
A decentralized power control algorithm that classifies neighboring vehicles into groups based on road alignment and heading, prioritizing safety risks by adjusting transmission power based on the location, speed, and direction of surrounding vehicles, while introducing randomness in algorithm invocation times to prevent oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is reduced to decrease network load in congested areas, then network congestion is reduced, but communication reliability for safety applications deteriorates
Solution Approach 1:
The patent applies local quality by differentiating transmission power settings based on local driving scenarios. Vehicles adjust power differently depending on whether they are on straight roads versus approaching intersections, ensuring high reliability at intersections while maintaining lower power on less critical road segments, thus resolving the contradiction between reducing network load and maintaining communication reliability.
Solution Approach 2:
The patent implements dynamic transmission power adjustment based on real-time driving scenarios and safety risks. The system continuously monitors vehicle position, road type, and congestion levels to dynamically optimize power settings, allowing the network load to be reduced in low-risk areas while maintaining high reliability in critical areas like intersections.
2Speed
If power control algorithms converge quickly, then response time is improved, but stability deteriorates due to synchronized power adjustments by multiple vehicles
Solution Approach 1:
The patent introduces periodic random delays in power adjustment execution across different vehicles. Instead of all vehicles adjusting power simultaneously when algorithms converge, vehicles apply adjustments at staggered intervals, preventing synchronized changes that cause oscillations while maintaining relatively fast convergence through efficient scenario-based decision making.
3Reliability
If transmission power is increased to ensure safety message reception at greater distances, then communication reliability is improved, but network congestion increases
Solution Approach 1:
The patent applies local quality by implementing spatially differentiated transmission power settings based on driving scenarios. High power is used only in critical areas such as intersections and curve approaches where safety message reception is essential, while lower power is used on straight roads with fewer safety concerns, thus achieving reliable safety communication without proportionally increasing overall network load.
Data Source
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AI summary
A method for controlling the transmission power of a driven vehicle in a vehicle-to-vehicle communication environment includes classifying vehicles whose transmissions are received at the driven vehicle into groups and adjusting the transmission power of the driven vehicle based on the classification results, In an embodiment, the received vehicles are classified relative to the driven vehicle into vehicles on the same road, vehicles on an opposite road and vehicles on other roads. The classification allows analysis and processing of a safety risk which is accounted for in the power setting. In some embodiments, only received vehicles traveling on other roads are used in a decision to increase power, while vehicles on an opposite road are ignore.