Vehicle Probe Data Upload Frequency for Road Feature Mapping
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Solution Overview
Problem
The existing map system generates excessive communication data by uploading position information of features along a road at uniform frequencies, potentially disclosing unintended information and increasing communication costs.
Innovation Solution
A vehicle-side device with a processor that acquires and analyzes peripheral object data to generate probe data, uploading it to a server in two modes: a first mode with a predetermined frequency and a second mode at a lower frequency, reducing the types of features uploaded, thereby reducing communication data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If probe data is uploaded at a uniform predetermined frequency, then map information is continuously updated, but communication data volume increases excessively
Solution Approach 1:
The upload frequency is changed from a static uniform value to a dynamic value that adjusts based on vehicle speed. When the vehicle travels above a threshold speed, probe data is uploaded at a first upload frequency; when traveling at or below the threshold speed, upload occurs at a second upload frequency different from the first. This dynamic adjustment reduces communication data volume while maintaining necessary map information updates.
Solution Approach 2:
The upload frequency parameter is changed based on vehicle operating conditions (speed). The system transitions between two distinct upload frequency states depending on whether the vehicle speed exceeds a predetermined threshold, optimizing communication efficiency for different driving scenarios.
2Loss of information
If all feature types are uploaded continuously, then comprehensive map information is maintained, but communication costs increase
Solution Approach 1:
The system extracts and uploads only specific feature types that are relevant to the vehicle's current operating conditions. By filtering probe data based on vehicle speed and feature type, the system transmits only necessary information to the server, reducing communication costs while maintaining map information completeness for safe driving.
Data Source
AI summary
A method for uploading a probe data, including coordinate information of a plurality of features disposed along a road, to a server, includes: acquiring at least one peripheral object data, representing a feature disposed around a vehicle, from a peripheral monitoring sensor mounted on the vehicle; analyzing the peripheral object data and calculate a position of the feature with respect to the road on which the vehicle travels; and generating the probe data including position information of the feature and uploading the probe data to the server. The uploading includes a first mode in which the probe data is uploaded to the server at a predetermined frequency, and a second mode in which the probe data is uploaded at a lower frequency than the first mode.