Vehicular Electronic Horizon Caching for HD Map Resource Limits
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Solution Overview
Problem
Vehicular systems face challenges in processing and storing large amounts of high-definition map data required for advanced driver assistance systems and autonomous driving, due to limited resources such as processors and memory in vehicles.
Innovation Solution
A vehicular electronic device that generates and stores electronic horizon data for frequently traveled sections, reducing the need for continuous data processing and storage by retrieving and updating data only when necessary, and optimizing communication by not receiving unnecessary HD map data for frequently traveled areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HD map data is continuously received and processed for all areas, then the availability of map data is improved, but the consumption of processing resources and memory increases
Solution Approach 1:
The system applies different data handling strategies to different geographic areas based on their importance and frequency of use. Frequently traveled sections receive continuous HD map data updates and processing, while less important areas use cached standard-definition data, optimizing resource allocation locally rather than uniformly across all areas
Solution Approach 2:
The map data is segmented into frequently traveled sections and other areas, with different processing priorities. The system divides the overall map data management into discrete manageable sections that can be independently processed, cached, and updated based on their specific requirements
2Loss of information
If HD map data is continuously received for all areas, then the data freshness is improved, but the communication bandwidth and data transmission requirements increase
Solution Approach 1:
The system extracts and identifies frequently traveled sections from the overall map data, separating them from less important areas. This extraction allows the system to apply optimized data reception strategies specifically to these important sections, receiving detailed HD data only where needed while reducing overall data transmission requirements
Solution Approach 2:
The system pre-identifies and caches standard-definition map data for all areas, and pre-receives HD map data for frequently traveled sections before they are needed. This preliminary action ensures data freshness is maintained for critical areas without requiring continuous real-time data transmission for all regions
3Productivity
If high-performance processors and memory are used, then the data processing capability is improved, but the device complexity and cost increase
Solution Approach 1:
The system applies high-performance processing only partially - specifically for frequently traveled sections where HD map data is generated and processed in real-time. For other areas, the system uses cached standard-definition data with minimal processing requirements, thus achieving adequate overall productivity without requiring high-performance processors and memory for the entire system
Data Source
AI summary
The present disclosure relates to a vehicular electronic device including a power supply configured to supply power, an interface configured to receive high-definition (HD) map data on a specific area from a server through a communication device, and at least one processor configured to continuously generate electronic horizon data on a specific area based on the HD map data in the state of receiving the power, wherein the processor generates first electronic horizon data on a first section, and, upon determining that a vehicle is traveling the first section again after having travelled the first section based on the first electronic horizon data, does not generate electronic horizon data on the first section.