Digital Road Map Update Using Virtual Journey Simulation
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Solution Overview
Problem
Updating a digital road map with new measurement data from motor vehicles is memory-intensive and computationally costly, as existing methods require storing all raw data and recalculating old and new data sets, increasing resource usage with each update.
Innovation Solution
A method where a processor circuit simulates a virtual trip on the existing road map to combine new data sets with virtual data, allowing for updated descriptive values without storing original data sets, using a conventional algorithm to generate the updated road map, thus reducing memory and computational requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all raw measurement data from motor vehicles is stored and recalculated for each update, then the digital road map can be continuously updated with new data, but memory usage and computational resources increase significantly with each update
Solution Approach 1:
The patent extracts and stores only the essential descriptive values ( aggregated measurement results) in the digital road map, while removing the need to retain complete raw measurement data sets. This extraction principle allows the system to maintain update capability with significantly reduced memory requirements, as only condensed descriptive values are preserved rather than full raw data sets from all vehicles.
Solution Approach 2:
The patent applies discarding by eliminating the requirement to store historical raw measurement data after descriptive values have been extracted. When new updates are needed, the system recovers information by processing new raw data against stored descriptive values, rather than recalculating from all historical raw data. This enables continuous updates while managing memory resources efficiently.
2Measurement precision
If all raw measurement data is retained and reprocessed for each update, then accurate updated descriptive values can be calculated, but computational effort and processing time increase with each update
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing descriptive values from measurement data during initial map creation or previous updates. This preliminary processing eliminates the need to reprocess all raw measurement data during subsequent updates, significantly improving update efficiency while maintaining accuracy through the use of pre-computed descriptive values that can be efficiently updated with new data.
3Adaptability or versatility
If new measurement data is integrated into an existing digital road map, then the map remains current and useful, but the system requires storing all historical data sets for comparison and combination
Solution Approach 1:
The patent applies copying by creating a simplified representation (descriptive values) of the measurement data that can be stored in the digital road map. Instead of storing and managing complex raw measurement data sets, the system uses these copied descriptive values as the basis for updates, reducing storage requirements while maintaining the capability to integrate new measurement data effectively.
Data Source
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AI summary
The invention relates to a method for updating a digital road map (12) which contains spatially resolved description values of at least one mapped environmental characteristic for at least one mapped road (26), wherein: a virtual journey (27) along the at least one mapped road (26) is simulated (S10), on the basis of the road map (12) to be updated, by a processor circuit (10) before the updating process, by the use of the road map (12) to determine, for different virtual geopositions (18), an associated virtual measurement value (15') of the at least one already mapped environmental characteristic, and by the use of said virtual measurement values (15') to generate, for the virtual geopositions (28), a concatenated data record (24) which describes the virtual journey (27); newly received concatenated data records (16, 16') of real journeys (20) of measuring motor vehicles (13) and the concatenated data records (24) of the virtual journey (27) are combined (S11); and the updated road map (12') is calculated (S12) from the combined data records.