eCall Device State Switching Verification
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Solution Overview
Problem
Existing eCall devices lack a secure method to prove that they have been switched off by the user, leading to potential legal and regulatory challenges for manufacturers, as it is difficult to differentiate between user-initiated shutdowns and device malfunctions.
Innovation Solution
A method where the eCall device communicates with a backend unit to document state changes, transmitting information messages and receiving confirmation messages to generate a report file that is stored, ensuring that the device can only switch states after confirmation, and allowing for secure logging of the switching procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the eCall device is switched off by the user, then the user has control over the device operation, but it becomes impossible to prove whether the shutdown was user-initiated or caused by malfunction
Solution Approach 1:
The system performs preliminary actions by establishing a communication link and transmitting information messages to the backend unit before the actual state change occurs. This preliminary documentation of the switching intent allows later verification of whether the shutdown was user-initiated or due to malfunction, resolving the contradiction between user control and reliability proof.
Solution Approach 2:
The backend unit sends confirmation messages back to the eCall device, creating a feedback loop that documents the switching procedure. This feedback mechanism provides verifiable proof of the state change, allowing the system to maintain both user control capability and reliability verification without compromising either aspect.
2Speed
If the eCall device transmits emergency messages automatically, then emergency response is rapid, but the device cannot distinguish between emergency activation and user-initiated shutdown
Solution Approach 1:
Before the eCall device changes its state (whether for emergency activation or user shutdown), it performs preliminary actions by transmitting information messages to the backend unit. This preliminary documentation preserves critical information about the switching intent, preventing information loss while maintaining rapid emergency response capability.
Solution Approach 2:
The backend unit acts as an intermediary that receives and processes information messages from the eCall device. This intermediary documentation layer preserves switching procedure information separately from the emergency message transmission path, ensuring that neither emergency speed nor information completeness is compromised.
3Reliability
If the eCall device stores switching information locally, then proof of shutdown is available, but the data may be lost or corrupted without external verification
Solution Approach 1:
The system merges local storage capability with remote backend verification. The eCall device stores switching information locally while simultaneously transmitting it to the backend unit, combining both approaches to achieve reliable proof availability without excessive complexity. The backend serves as an external verification layer that reduces the burden on local storage reliability.
Data Source
Figure 1
AI summary
The present invention relates to a method of performing a switching procedure of an eCall device (10) from a first state (ON or OFF) of activity (30) to a second state (ON or OFF) of activity (31 ) whereby details of the switching procedure are preferably stored in a report file (14), said report file (14) is preferably stored in a storage unit (12) which can be part of a database. Furthermore, the present invention relates to an eCall device (10) being adapted for performing a switching procedure from a first state of activity (30) to a second state of activity (31) and relates to a backend unit (11) being adapted for supporting a switching procedure of an eCall device (10) from a first state of activity (30) to a second state of activity (31). Beyond the present invention relates to an eCall system (1) being adapted for performing a switching procedure of an eCall device (10) from a first state (ON or OFF) of activity (30) to a second state (ON or OFF) of activity (31).