Vehicle Interface Device for Secure Command Transmission
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Solution Overview
Problem
Existing methods for transmitting function commands between a motor vehicle and an external device require the physical presence of both endpoints for validation and testing during the development phase, limiting the ability to independently develop and test application programs.
Innovation Solution
An interface device acts as a modular backend building block, providing a programming interface that decouples and secures the communication link between the motor vehicle and the external device, allowing function commands to be validated and tested without the need for the motor vehicle or device to be present, by comparing commands against a set of valid functions and ensuring compatibility and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct communication between motor vehicle and external device is used for command transmission, then communication simplicity is maintained, but testing and validation during development phase requires physical presence of both endpoints which increases complexity and reduces efficiency
Solution Approach 1:
The patent introduces an interface device as an intermediary component that decouples the motor vehicle and external device. This interface device provides standardized function commands and enables independent testing during development phase without requiring both endpoints to be physically present, thus resolving the contradiction between communication simplicity and testing complexity
Solution Approach 2:
The communication system is segmented into distinct components: the motor vehicle, the external device, and the interface device. This segmentation allows the interface device to independently manage command validation and testing, enabling development phase testing without requiring both original endpoints to be present
2Reliability
If interface device with command validation is introduced, then command security and compatibility are improved, but system complexity increases due to additional communication component
Solution Approach 1:
The interface device is designed with multi-functionality, serving as both a command validation mechanism for security and a standardized interface for compatibility. By consolidating these functions into a single component, the patent improves reliability without proportionally increasing system complexity
3Measurement precision
If function commands are validated against multiple valid commands in interface device, then command accuracy and compatibility are improved, but processing time and computational resources increase
Solution Approach 1:
The interface device maintains a pre-defined set of valid function commands and their parameters. During operation, incoming commands are quickly validated against this pre-established reference set, reducing processing time while maintaining high accuracy through comprehensive validation
Data Source
Figure 1
AI summary
The invention relates to a method for transmitting a function command (11) between a motor vehicle (3) and a device (4) outside the vehicle, in which the function command (11) is transmitted via an interface apparatus (2) which is outside the vehicle and provides a communication connection between the motor vehicle (3) and the device (4), and the interface apparatus (2) provides an interface (9) which is used to provide a multiplicity of valid function commands (10), wherein the function command (11) is compared with the multiplicity of valid function commands (10), and the function command (11) is forwarded only if this function command (11) conforms to the interface, wherein the function command (11) is transmitted between the motor vehicle (3) and the device (4) only via the interface (9).