Map Data Updating Device for Autonomous Vehicles
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Solution Overview
Problem
The high communication load incurred by vehicle self-driving systems when receiving and updating large amounts of map data from servers is not adequately reduced by existing real-time map data updating systems, despite efforts to optimize update conditions.
Innovation Solution
A map data updating device that stores initial map data before travel and requests updates for specific road zones along a scheduled route, using a processor to update the data with information received from the server, thereby reducing communication load by prioritizing updates based on update cycles and timestamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the vehicle receives all updated map data from the server, then the map data accuracy is improved, but the communication load increases
Solution Approach 1:
The patent segments map data into multiple layers (basic map data, construction information, traffic regulations, road signs, lane markings) and divides updates into road zone portions. The vehicle selectively receives only the necessary segments (update information for specific road zones along the scheduled route) rather than all map data, reducing communication load while maintaining accuracy for relevant areas.
Solution Approach 2:
The patent extracts only the necessary update information from the complete map data set. The server identifies and transmits only the portions of map data that have changed and are relevant to the vehicle's scheduled route, rather than transmitting all updated map data. This extraction approach maintains map data accuracy while significantly reducing communication load.
2Reliability
If the vehicle requests update information for all road zones, then the map data is fully updated, but the communication load increases
Solution Approach 1:
The patent applies local quality by differentiating update requirements for different road zones along the scheduled route. The vehicle requests update information only for road zones where changes have occurred and are relevant to the scheduled route, rather than uniformly updating all road zones. This selective approach ensures reliability for critical areas while reducing overall communication load.
Solution Approach 2:
The patent implements partial action by requesting only the necessary portion of map data updates (specific road zones with changes) rather than complete updates for all road zones. This partial updating strategy achieves sufficient reliability for the vehicle's navigation needs while minimizing communication load.
3Measurement precision
If the vehicle updates map data frequently, then the accuracy is improved, but the communication load and energy consumption increase
Solution Approach 1:
The patent implements periodic action by updating map data only when changes are detected and only for relevant road zones along the scheduled route. Rather than continuous or frequent updates, the system periodically checks for changes and updates only when necessary, reducing energy consumption while maintaining accuracy for areas that have actually changed.
Solution Approach 2:
The patent applies preliminary action by identifying and requesting update information for specific road zones before the vehicle reaches them during its scheduled route. This allows the vehicle to receive updates in advance only for relevant areas, improving accuracy when needed while avoiding unnecessary energy consumption from frequent or premature updates.
Data Source
AI summary
A map data updating device comprises a communication unit, a memory, and a processor configured to store map data, received from a server through the communication unit before the vehicle has begun to travel, in the memory as initial map data, and to send a request to the server through the communication unit for update information representing information updated from the initial map data for each of a plurality of road zones within the scheduled route, from among the information associated with the road zones in the map data updated at the server, and to use the update information received through the communication unit to update the initial map data, after the vehicle has begun to travel along the scheduled route.