Map Update System Prioritizing Sensor Data Matching Degree
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Solution Overview
Problem
Existing map update systems do not prioritize highly important sensor data, treating all sensor data uniformly, which can lead to less critical data being updated before more critical changes in the road environment are reflected in the map.
Innovation Solution
A map update system that includes a data transmission device on vehicles to generate and transmit sensor data, with a matching degree calculation unit determining the priority of data transmission based on the similarity between sensor data and map data, where data with a lower matching degree is transmitted and updated with higher priority using a faster communication channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor data is uniformly processed without priority differentiation, then all data is treated equally, but highly important data cannot be reflected with priority in map updates
Solution Approach 1:
The patent applies local quality by differentiating the processing priority of sensor data based on its importance. Specifically, sensor data is categorized into first sensor data (with matching degree below threshold) requiring high priority processing, and second sensor data (with matching degree above threshold) requiring standard processing. This allows critical road environment changes to be reflected in map updates with higher priority while maintaining standard processing for less critical data.
Solution Approach 2:
The patent implements dynamics by making the map update process adaptive to data importance. The map data update unit dynamically adjusts processing priority based on the matching degree calculation, enabling the system to respond flexibly to varying data criticality. This dynamic prioritization ensures that highly important data is processed and reflected in map updates more quickly than standard data.
2Loss of time
If first sensor data with low matching degree is updated with higher priority, then important data is reflected faster, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by calculating the matching degree between sensor data and map data before processing. The matching degree calculation unit pre-assesses the importance of incoming sensor data by comparing it with existing map data, identifying first sensor data (low matching degree) that requires priority processing. This preliminary classification enables the system to prepare for differentiated processing, reducing actual update time for critical data without adding complex real-time decision-making mechanisms.
Data Source
AI summary
A map update system includes a data transmission device mounted on a vehicle and a map server which stores map data. The data transmission device generates sensor data representing a road environment of surroundings of the vehicle in a predetermined position, calculates a matching degree between the road environment of the surroundings of the vehicle and a road environment in the predetermined position represented by the map data, and causes a communication circuit mounted on the vehicle to transmit the sensor data and information representing the matching degree to the map server. The map server transmits the map data by utilizing sensor data, among the sensor data received via a communication device, having a matching degree less than a matching degree threshold with a higher priority than sensor data having a matching degree or greater than the matching degree threshold.