Detached Emergency Call Unit Architecture for Faster Vehicle Certification
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Solution Overview
Problem
Existing motor vehicle systems with integrated emergency call units face lengthy and costly certification and approval processes due to the integration of multiple components requiring certification, which increases development cycles and resource allocation.
Innovation Solution
A system where the emergency call unit is decoupled from the vehicle's communication bus and controlled by a separate control unit, allowing for reduced certification efforts and simplified implementation by isolating certification-relevant functions to the control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the emergency call unit is integrated into the same system as the telematics unit and connected to the communication bus, then the system can provide comprehensive vehicle communication functions, but the certification and approval process becomes lengthy and costly due to multiple components requiring certification
Solution Approach 1:
The system is divided into two independent parts: a control unit connected to the communication bus and an emergency call unit that is not directly connected to the bus. This segmentation allows the emergency call unit to be certified separately, reducing the overall certification time and cost while maintaining full system functionality through the control unit's coordination.
Solution Approach 2:
The emergency call unit is extracted from the main control system and positioned as a separate functional module. By taking out the emergency call functionality from the integrated system, it can undergo certification independently, avoiding the need to certify the entire complex system together, thus reducing time and costs.
2Ease of operation
If the emergency call unit is directly connected to the communication bus, then it can access vehicle systems directly, but it requires extensive diagnostic capabilities and resources within the unit itself
Solution Approach 1:
The control unit serves as an intermediary between the emergency call unit and the communication bus. The emergency call unit communicates its needs to the control unit, which then handles the complex diagnostic capabilities and communication bus interactions, reducing the complexity requirements of the emergency call unit itself while maintaining direct access functionality.
3Adaptability or versatility
If multiple components are integrated in one system requiring certification, then the system provides comprehensive functionality, but the development cycle becomes lengthy and expensive
Solution Approach 1:
By segmenting the system into a control unit and an emergency call unit with distinct certification requirements, the development process can proceed in parallel. The emergency call unit can be developed and certified independently from the main telematics system, significantly reducing the overall development cycle while maintaining comprehensive functionality.
Data Source
AI summary
The invention relates to a system for a motor vehicle having a control unit, which is connected to a communication bus of the motor vehicle, and an emergency call unit which is designed to make an emergency call to an emergency call center, wherein the emergency call unit is connected to the control unit via an interface and can operate in a first operating mode, which corresponds to the normal operation of the emergency call unit, in which the control unit controls the emergency call unit and supplies it with energy via the interface, and in a second operating mode, in which the emergency call unit is designed to make the emergency call to the emergency call center without control and energy by way of the control unit. The emergency call unit is only connected via the interface and not directly to the communication bus.