Selective CAN Bus Termination for Reliable Emergency Call Triggering
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Solution Overview
Problem
Existing vehicle communication systems lack a simple and reliable method for initiating emergency calls to a Public Safety Answering Point (PSAP) without requiring registration with a mobile application service provider, and the voice recognition interface often fails during emergencies.
Innovation Solution
An integrated vehicle communication system with an emergency call apparatus connected to the vehicle data bus, featuring a push-button switch or automatic trigger conditions to initiate emergency calls to a PSAP, and a bi-directional gateway to maintain communication even in vehicle crashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voice recognition interface is used to dial 911, then hands-free operation is achieved, but reliability deteriorates due to voice changes during emergency
Solution Approach 1:
The patent introduces an intermediary device (emergency call button or automatic crash detection system) that mediates between the user and the telecommunication apparatus. This intermediary provides a reliable alternative to voice recognition by using physical button presses or automatic crash detection signals, which are not affected by voice changes during emergency situations.
Solution Approach 2:
The system implements automatic crash detection that self-initiates emergency calls without requiring user input. The telecommunication apparatus automatically detects crash conditions through sensors and places emergency calls autonomously, eliminating the need for unreliable voice commands or manual button pressing during critical moments.
2Reliability
If embedded cellular telephone is used for emergency calls, then free 911 access is provided, but ease of operation deteriorates compared to single button activation
Solution Approach 1:
The patent merges the emergency call button functionality with the existing telecommunication apparatus integration. The single emergency call button is combined with the embedded cellular telephone system, allowing users to initiate emergency calls with a single button press while maintaining free 911 access through the integrated telecommunication apparatus.
Solution Approach 2:
The system provides automatic crash detection that self-initiates emergency calls without requiring any user action. Upon detecting a crash condition, the system automatically places emergency calls to 911, eliminating the need for manual dialing or button pressing while maintaining free emergency access.
3Reliability
If registration with mobile application service provider is required, then emergency assistance service is provided, but adaptability deteriorates for unregistered users
Solution Approach 1:
The patent extracts the emergency call initiation functionality from the registered mobile application service provider system. By enabling direct 911 dialing through the embedded telecommunication apparatus and providing automatic crash detection, the system separates emergency call capabilities from the proprietary service provider platform, allowing unregistered users to access emergency services directly.
Solution Approach 2:
The telecommunication apparatus is designed to perform multiple functions: it can connect to both the mobile application service provider system for registered users and directly to public safety answering points for unregistered users. This universal design ensures that emergency services are accessible to all users regardless of registration status.
Data Source
AI summary
An apparatus for selective network termination comprises a processor, an electrical terminal for connecting the apparatus to a CAN bus, a CAN bus interface electrically connected to the processor and to the electrical terminal, and a network termination resistor. A relay is configured to selectively connect the electrical terminal to the network termination resistor. The relay is electronically controlled by executing computer program instructions in the processor. The processor is configured to communicate on the CAN bus through the CAN bus interface.