Vehicle Data Transmission via Parked Repeater Nodes
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Solution Overview
Problem
Current data transmission methods for highly automated driving systems are inefficient in distributing map data from a central point to vehicles, particularly in terms of bandwidth usage and transmission quality, especially when vehicles lack direct access to good transmission channels.
Innovation Solution
A method where vehicles determine optimal transmission locations and times based on driving routes and transmission quality, allowing data to be relayed through parked vehicles that act as repeaters, thereby reducing bandwidth requirements and utilizing multiple transmission channels, including cellular and radio links, to ensure efficient data transfer to a central server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data is transmitted directly from each vehicle to the central server, then data transmission is simple, but bandwidth consumption is high
Solution Approach 1:
Multiple vehicles transmit their map data to a single parked vehicle (repeater) which then relays the combined data to the central server. This merging approach consolidates multiple transmission channels into one, significantly reducing total bandwidth consumption while maintaining data collection from multiple sources.
Solution Approach 2:
A parked vehicle acts as an intermediary repeater between moving vehicles and the central server. The repeater receives data from multiple vehicles, stores it temporarily, and forwards it to the server, thereby reducing direct bandwidth requirements from each vehicle to the server while enabling indirect data transmission.
2Ease of operation
If data is transmitted at any location, then transmission timing is simple, but transmission quality is poor
Solution Approach 1:
The system pre-determines optimal transmission locations along each vehicle's route where transmission quality is expected to be good. Before the vehicle reaches these locations, the system identifies them based on route information and transmission quality data, allowing the vehicle to transmit at predetermined optimal points rather than arbitrarily.
Solution Approach 2:
The system uses transmission quality information feedback to determine when and where transmissions should occur. By analyzing transmission quality at different locations along the route, the system selects locations with good quality for actual data transmission, ensuring reliable communication while maintaining operational simplicity.
3Loss of information
If vehicles transmit data continuously, then data freshness is high, but energy consumption is high
Solution Approach 1:
Instead of continuous transmission, the system implements periodic transmission at predetermined optimal locations along the vehicle's route. Vehicles transmit data at these scheduled intervals when transmission quality is good, reducing energy consumption while maintaining adequate data freshness for map updates.
Data Source
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AI summary
The invention relates to a method for transmitting data from a vehicle to an external receiving unit. Information is provided which contains a transmission quality for at least one transmission channel dependent on multiple locations. Using a route of the vehicle and the information, a transmission location is ascertained, and the data is transmitted when the vehicle reaches the transmission location. In a method for transmitting data from an external transmitting unit to a receiving unit of a vehicle, the transmitting unit provides first information on a route or a position of the vehicle. The first information is used to ascertain a point in time at which the vehicle is located at a specified location. Second information contains a transmission quality for at least one transmission channel dependent on multiple specified locations. Using the route or the position of the vehicle and the second information, a transmission time is ascertained. The data is transmitted to the vehicle upon the occurrence of the transmission time. A data processing device and a central location are designed to carry out the method.