Autonomous Driving Map Prioritization for Route-Aware Data Transfer
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Solution Overview
Problem
Existing vehicle systems face challenges in efficiently transmitting map data for autonomous driving, particularly in selecting and prioritizing regions a vehicle is likely to travel, which affects the timely acquisition of necessary map information by the autonomous driving control unit.
Innovation Solution
A vehicle system that includes a map processing unit creating local map data, an autonomous driving control unit, and a map guidance unit, which prioritizes and sequentially transmits map data corresponding to regions near the vehicle, including the route to the destination, branch routes, and merging routes, to ensure efficient data transmission and continuous autonomous driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the map processing unit transmits all local map data to the autonomous driving control unit, then the autonomous driving control unit can have complete map information, but the data transmission amount becomes excessively large
Solution Approach 1:
The map data is divided into multiple pieces based on geographic regions, with each piece corresponding to a specific area. The map processing unit selectively transmits only the relevant region pieces to the autonomous driving control unit, rather than transmitting all map data. This segmentation approach reduces the data transmission amount while ensuring that the complete necessary map information for the vehicle's current location and destination is provided.
2Adaptability or versatility
If the map processing unit transmits map data for all regions, then the autonomous driving control unit can handle any route changes, but the transmission time and data amount increase significantly
Solution Approach 1:
The map processing unit performs preliminary actions by identifying and prioritizing map data for regions that the vehicle is likely to travel through, including the current location, destination, and potential branch routes. This preliminary selection and prioritization of data transmission ensures that the autonomous driving control unit receives necessary map information in advance, enabling timely route change handling without waiting for complete data transmission from all regions.
3Quantity of substance
If the map processing unit selects only nearby regions for transmission, then the data transmission amount is reduced, but the autonomous driving control unit cannot handle route changes to distant areas
Solution Approach 1:
The map data transmission is optimized by applying different quality levels to different regions based on their relevance to the vehicle's current situation. Regions closer to the vehicle's current location and destination receive higher priority and are transmitted with more detailed information, while distant regions receive lower priority. This local quality differentiation ensures that the autonomous driving control unit has sufficient map information for nearby areas while maintaining the capability to handle route changes to distant areas when necessary.
Data Source
AI summary
A vehicle system includes: a map processing unit that creates local map data based on high accuracy map data and a position of an own vehicle; an autonomous driving control unit that creates a travel plan based on the local map data and controls traveling of the own vehicle according to the travel plan; and a map guidance unit that, based on a set destination, sets a route to the destination. The map processing unit creates multiple pieces of transmission data by dividing the local map data so as to correspond to regions on a map, selects pieces of transmission data corresponding to regions located within a prescribed distance from the own vehicle and including the route to the destination as first transmission data, and transmits the first transmission data to the autonomous driving control unit with a higher priority than other pieces of transmission data.