Vehicle Map Generation Using Real-Time Forward Region Prediction
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Solution Overview
Problem
Existing map generation systems for vehicles lack immediacy in responding to actual traffic situations, which can lead to inefficiencies and safety concerns during automated driving.
Innovation Solution
A map generation system that includes a vehicle terminal with a communication unit, an input data compilation device, and an output data compilation device, which accumulates and processes data to create current state map data, allowing predictive calculations of a vehicle's forward region and transmitting results to the vehicle for safe navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If map data is updated frequently to improve immediacy, then responsiveness to traffic situations improves, but data transmission time and network load increase
Solution Approach 1:
The system extracts and transmits only the necessary current state map data (vehicle positions, speeds, directions) from the complete map dataset, rather than transmitting all map data. This selective extraction reduces transmission time while maintaining the immediacy of critical traffic information.
Solution Approach 2:
The server performs preliminary calculations to determine forward regions and safe traveling areas before transmitting the data to vehicles. This advance preparation ensures that when data is transmitted, it is already processed and ready for immediate use, improving responsiveness without increasing transmission time.
2Reliability
If predictive calculation of forward region is performed, then safety of automated driving improves, but calculation complexity increases
Solution Approach 1:
The calculation process is segmented into distinct stages: first determining the forward region based on vehicle state and map data, then calculating safe traveling regions within that forward region, and finally dividing the traveling region into multiple divisions. This segmentation makes the complex calculation more manageable and systematic.
Solution Approach 2:
The server performs preliminary determination of forward regions using current state map data before conducting the full safe traveling region calculation. This preliminary step simplifies subsequent calculations by establishing boundaries and constraints in advance, reducing overall calculation complexity while maintaining safety.
3Measurement precision
If current state map data is created using accumulated data from multiple vehicles, then accuracy of traffic situation representation improves, but data accumulation time increases
Solution Approach 1:
The data accumulation unit continuously accumulates map data, vehicle state data, and surrounding vehicle data in real-time rather than collecting data in batches. This continuous accumulation ensures that the current state map data always reflects the latest traffic situation, improving accuracy without significant time delay.
Solution Approach 2:
The system uses feedback mechanisms where the server receives data from vehicles, processes it to create current state map data, then uses this data to calculate forward regions and safe traveling regions, which are transmitted back to vehicles for navigation. This closed-loop feedback ensures continuous refinement and accuracy of traffic situation representation.
Data Source
AI summary
A map generation system includes a vehicle including a terminal, an input data compilation device, and an output data compilation device. The input data compilation device includes a data reception unit, a data accumulation unit, and a current state map data creation unit. The data reception unit communicates with a communication unit of the terminal. The data accumulation unit accumulates data held by the terminal. The current state map data creation unit creates current state map data using data accumulated by the data accumulation unit, and map data, regional data, or both. The output data compilation device includes a forward region calculation unit and a calculation transmission unit. The forward region calculation unit makes predictive calculation of a forward region of the vehicle, using the current state map data. The calculation transmission unit communicates with the communication unit regarding a result of the predictive calculation.