Vehicle Emergency Notification Device Mode Switching
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Solution Overview
Problem
Conventional on-vehicle emergency notification devices allow third-party wrongful use of built-in phones, preventing necessary notifications and device reuse due to prohibited vehicle body number rewriting.
Innovation Solution
The device allows vehicle body number and emergency notification phone number registration in factory mode, permitting rewriting during this phase, then shifts to market mode where rewriting is prohibited, enabling device replacement and reuse while preventing wrongful use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rewriting of vehicle body number is prohibited at the time of shipping from vehicle factory, then wrongful use of built-in phone is prevented, but defective devices cannot be replaced and device reuse is impossible
Solution Approach 1:
The patent applies the dynamics principle by implementing a mode switching mechanism that changes the writability status of the vehicle body number field. The system transitions between factory mode (where rewriting is permitted) and market mode (where rewriting is prohibited), allowing the device to adapt its security characteristics based on operational context. This resolves the contradiction by making the restriction dynamic rather than static, enabling both device replacement during manufacturing and wrongful use prevention during normal operation.
Solution Approach 2:
The patent applies parameter changes by modifying the writability parameter of the vehicle body number field based on the operational mode. In factory mode, the writability parameter is set to allow rewriting, facilitating device replacement and reuse. In market mode, the writability parameter is set to prohibit rewriting, preventing wrongful use. This parameter-based control mechanism enables the system to satisfy both contradictory requirements under different operating conditions.
2Ease of repair
If rewriting of vehicle body number is permitted, then device replacement and reuse are enabled, but third parties can wrongfully use the built-in phone
Solution Approach 1:
The system dynamically adjusts the rewriting permission based on the operational mode. During factory mode, rewriting is permitted to enable device replacement and reuse. After transitioning to market mode, rewriting is automatically prohibited to prevent wrongful use by third parties. This dynamic control eliminates the need to choose between device repairability and security, as both requirements are satisfied at different stages of the device lifecycle.
Solution Approach 2:
The patent applies preliminary action by establishing the vehicle body number and emergency notification phone number as a bound pair during factory mode before transitioning to market mode. This preliminary configuration ensures that any device replacement occurs under controlled conditions with proper authorization, and once the binding is complete, the system transitions to a state where further rewriting is prohibited, thereby preventing wrongful use while maintaining repairability during the setup phase.
3Reliability
If vehicle body number and emergency notification phone number are registered as a set, then authorized notifications are ensured, but flexibility for device repair and reuse is reduced
Solution Approach 1:
The system applies dynamics by making the binding between vehicle body number and emergency notification phone number temporary and mode-dependent. During factory mode, the binding can be established or modified to support device replacement and reuse. After transitioning to market mode, the binding becomes fixed to ensure authorized notifications. This dynamic binding mechanism provides flexibility when needed while ensuring security when required.
Solution Approach 2:
The patent applies segmentation by separating the device operation into distinct phases: factory mode for configuration and device replacement, and market mode for secure operation. This segmentation allows the system to have different rules for different phases, enabling device repair and reuse during factory mode while ensuring authorized notifications during market mode, thereby resolving the contradiction between flexibility and reliability.
Data Source
AI summary
The present invention relates to an on-vehicle emergency notification device for performing a notification to an external emergency call center, in the event of an emergency. The on-vehicle emergency notification device is configured to allow a vehicle body number (VIN) and an emergency notification phone number (CIM number) to be registered therein in the form of a set, so as to enable the notification to the emergency call center, wherein the on-vehicle emergency notification device is configured such that: during execution of a factory mode for performing the registration of the vehicle body number and the emergency notification phone number, rewriting of the vehicle body number is permitted; and, after the registration of the vehicle body number and the emergency notification phone number is completed and then the factory mode is shifted to a market mode, the rewriting of the vehicle body number is prohibited.