Vehicle DGPS Positioning via Representative Node Selection
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Solution Overview
Problem
Current GPS systems, including DGPS, face limitations in accuracy due to restricted service areas and increased traffic from direct signal reception, which hinder precise vehicle positioning for safety technologies.
Innovation Solution
A system and method that select a representative vehicle within divided areas to receive and retransmit DGPS signals through V2V and V2I communication, reducing traffic and enhancing signal accuracy by using a grid-pattern area division and dynamic representative vehicle selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all vehicles directly receive the DGPS signal from the road-side unit, then positioning accuracy is improved, but communication traffic is significantly increased
Solution Approach 1:
The service area is divided into multiple small areas, and each area selects a representative vehicle to receive and retransmit DGPS signals. This segmentation reduces the number of vehicles directly receiving signals from the road-side unit while maintaining coverage across the entire service area, thereby reducing communication traffic while preserving positioning accuracy for all vehicles.
Solution Approach 2:
Representative vehicles act as intermediary nodes between the road-side unit and other vehicles in the same area. These representative vehicles receive DGPS signals from the road-side unit and retransmit them to other vehicles via V2V communication, reducing the direct communication load on the road-side unit while ensuring signal distribution to all vehicles.
2Measurement precision
If DGPS is used to improve positioning accuracy, then measurement precision is improved, but service area coverage is restricted by base station coverage
Solution Approach 1:
The service area is segmented into multiple small areas, each with its own representative vehicle. This allows the DGPS signal to be distributed throughout the entire service area through V2V communication between representative vehicles and other vehicles, extending effective coverage beyond the direct range of the road-side unit while maintaining positioning accuracy.
3Productivity
If a representative vehicle system is implemented to reduce traffic, then communication efficiency is improved, but system complexity is increased
Solution Approach 1:
The representative vehicle is not fixed but dynamically selected from vehicles within each small area based on their presence and communication capability. This dynamic selection allows the system to adapt to changing vehicle compositions while maintaining efficient communication, balancing the reduction in traffic with manageable system complexity through simple selection criteria.
Data Source
AI summary
Disclosed are a system and a method for complementing a position of a vehicle and an apparatus for controlling complementing a position of a vehicle that select a representative vehicle within divided areas and complement a position of an own vehicle from a representative vehicle by using a DGPS complementation signal received through vehicle to vehicle (V2V) communication and vehicle to infrastructure (V2I) communication.