Vehicle Communication System Reducing Bandwidth via Data Difference Transmission
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Solution Overview
Problem
High data transmission rates between vehicles and backend systems for updating map and environment data pose inefficiencies, particularly due to the large volume of data generated by multiple vehicles, which existing compression methods do not adequately address.
Innovation Solution
A communication device equipped with sensor, receiving, processing, and transmission devices that capture, compare, and transmit only the differences in environmental data relative to reference data, using a grid-based model and selective data transmission based on object presence and movement within the sensor's field of view, thereby reducing unnecessary data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all environmental data from multiple vehicles is transmitted to the backend, then the map data can be kept up-to-date, but the data transmission bandwidth becomes excessively large
Solution Approach 1:
The patent extracts and transmits only the essential difference information between environmental data and reference data, rather than transmitting all environmental data. This is achieved by calculating difference values that represent only the changes or deviations from the reference map data, thereby significantly reducing the data transmission bandwidth while maintaining the ability to update map data accurately
Solution Approach 2:
The patent transforms the transmission approach by changing the parameter being transmitted from complete environmental data to difference values. This parameter transformation reduces the data volume while preserving the essential information needed for map updates, as the difference values contain only the necessary changes relative to the reference data
2Productivity
If compression methods are applied to reduce data rate, then transmission efficiency improves, but the complexity of data processing increases
Solution Approach 1:
The patent performs preliminary processing by calculating difference values between environmental data and reference data before transmission. This preliminary action of computing differences simplifies the subsequent transmission and processing steps, as the reduced data volume requires less compression and processing effort compared to applying complex compression algorithms to full environmental data sets
Data Source
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AI summary
The invention relates to a communication system (200) for a vehicle, which device includes a sensor device (201), wherein the sensor device (201) is arranged to capture sensor data when the sensor device moves. A receiving device (206a) receives reference data from an external management system (102, 102a, 102b) and a processing device (203) determines a difference between the captured sensor data and the corresponding reference data, wherein the determined difference between the captured sensor and the corresponding reference data is transmitted to the external management system.