In-Vehicle eCall State Transitions for Reliable Emergency Connections
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Solution Overview
Problem
The existing European Union eCall system lacks clear state control for the in-vehicle system (IVS), leading to potential risks during product implementation and affecting the overall eCall function's efficiency and reliability.
Innovation Solution
A method and apparatus for controlling the emergency call state by defining distinct states such as power-on initialization, call deactivation, call origination, sending, waiting for acknowledgement, in-call, and waiting for callback, with specific transition rules based on indication messages and timers to manage call connections and data transmission effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the eCall system follows the existing European Union technical specification without state control design, then the system can be implemented with standard protocols, but the overall eCall function reliability is compromised due to unclear state control
Solution Approach 1:
The eCall system is divided into multiple distinct states (power-on initialization state, call deactivation state, call origination state, sending state, waiting for acknowledgement state, in-call state, waiting for callback state). Each state has clearly defined entry and exit conditions, transforming the complex state control problem into manageable segmented states that improve reliability without overwhelming complexity
Solution Approach 2:
The system implements dynamic state transitions based on received messages and timer conditions. The IVS automatically transitions between states according to the eCall procedure progress, enabling adaptive control that responds to real-time system conditions while maintaining structured state management
2Reliability
If the in-vehicle system implements detailed state control with multiple states and transition rules, then the eCall system reliability improves, but the system complexity increases
Solution Approach 1:
The state control method is pre-defined with clear entry and exit conditions for each state. The system is configured in advance with the complete state transition logic, including timer settings (T2, T9) and message handling rules, allowing the complex state control to be implemented systematically without increasing operational complexity during runtime
Data Source
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AI summary
Disclosed are a method and an apparatus for controlling an emergency call state, an electronic device, and a storage medium. The method includes: determining that an in-vehicle system enters a power-on initialization state after the in-vehicle system is started, the power-on initialization state being configured for initialization of the in-vehicle system; determining that the in-vehicle system enters a call deactivation state after the initialization of the in-vehicle system is completed, the call deactivation state being configured for processing an emergency call origination message; and controlling the in-vehicle system to enter a call origination state based on the emergency call origination message sent by the in-vehicle system, in which the in-vehicle system establishes a call connection with a public safety answering point in the call origination state.