Motor Vehicle Data Transfer via Segmented Frames
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Solution Overview
Problem
Current data transfer processes in motor vehicles are hindered by slow data transfer rates due to the size of data packages being limited by buffer memory, causing prolonged bus occupation and instability in programming control devices.
Innovation Solution
A process where data is transferred in multiple data frames with a predetermined format, allowing simultaneous transmission of data to multiple control devices via a vehicle-external transmission device, optimizing data quantity and reducing bus occupation time by using error handling and buffer memory management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is transferred in large packages limited by buffer memory size, then the buffer memory can be fully utilized, but the data transfer rate becomes slow and bus occupation time increases
Solution Approach 1:
The patent divides large data packages into smaller data frames that can be transmitted sequentially over the data bus. Instead of transferring one large data package at a time, the system segments the data into multiple smaller frames, allowing other control devices to access the bus in between transmissions. This segmentation resolves the contradiction by enabling smaller transmission units that reduce bus occupation time while maintaining efficient buffer utilization.
2Quantity of substance
If the control device writes data slowly into buffer memory, then the buffer memory is fully utilized, but the data bus remains occupied for prolonged periods
Solution Approach 1:
The transmission device segments data into smaller frames that can be quickly transmitted and released from the bus. Each frame is transmitted individually, allowing the bus to be freed sooner rather than being occupied by a single large data package. This enables the control device to write data at its own pace into the buffer memory without prolonging bus occupation.
3Reliability
If data is transferred sequentially to multiple control devices, then each device receives complete data, but the overall transfer time increases
Solution Approach 1:
The patent transmits data frames in a segmented sequence to multiple control devices. Each control device receives the complete set of segmented frames, ensuring data completeness. The segmentation allows for systematic transmission to multiple devices without requiring one device to hold the bus exclusively until complete transfer, thereby reducing overall transfer time while maintaining reliability.
4Quantity of substance
If large data quantities are transferred, then comprehensive programming is achieved, but bus occupation time and transfer instability increase
Solution Approach 1:
The patent segments large data quantities into manageable frames that are transmitted systematically to multiple control devices. This segmentation prevents any single device from monopolizing the bus for extended periods, reducing contention and instability. Each device receives the complete segmented data set, ensuring comprehensive programming while maintaining system stability through distributed, time-efficient transmission.
Data Source
AI summary
A process is provided for transferring a first sequence control and/or first data into a first control device and a second sequence control and/or second data into a second control device in a motor vehicle. The transfer is carried out by way of a first data bus while using a first transmission protocol which has a data frame with a predetermined frame format or message format, and the transfer as a whole takes place by the transmission of a plurality of data frames. In a first step, by way of a first data frame, a portion of the first sequence control and/or of the first data is transmitted to the first control device. In a second step, by way of the second data frame, a portion of the second sequence control and/or of the second data is transmitted to the second control device.