In-Vehicle Emergency Call Power Management for Stolen Vehicle Search
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Solution Overview
Problem
In-vehicle emergency call apparatuses cannot transmit position information signals to a service center after a predetermined period following the switch from ON to OFF, limiting the effectiveness of stolen vehicle searches.
Innovation Solution
An in-vehicle communication apparatus that continues to transmit position information signals to a service center based on a position information request, even after a predetermined period has passed since the ACC switch was turned OFF, by maintaining power until a specified incoming call waiting date and time, ensuring continuous operation for stolen vehicle searches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power is switched from ON to OFF after a predetermined period following the ACC switch change, then power consumption is reduced, but the ability to transmit position information signals for stolen vehicle search is lost
Solution Approach 1:
The patent implements dynamic power management where the power switching timing is not fixed but adapts based on incoming call requests. The control unit dynamically extends the power ON period when position information requests are received, allowing the system to transition from a static predetermined period to a flexible dynamic period that accommodates stolen vehicle search operations
Solution Approach 2:
The patent changes the time parameter of power supply from a fixed predetermined period to a variable period determined by incoming call requests. The control unit modifies the power switching timing parameter based on whether position information requests are received, thereby adjusting the system's operational window to balance power savings with functional requirements
2Adaptability or versatility
If the power remains ON for a predetermined period after the ACC switch is turned OFF, then position information can be transmitted for stolen vehicle search, but power consumption increases
Solution Approach 1:
The system uses incoming call requests from the service center as triggers to extend power supply. Rather than continuously remaining ON or using a fixed predetermined period, the system activates extended power supply only when needed - when the service center initiates a position information request, making the power consumption pattern self-regulating based on actual operational requirements
3Loss of energy
If the power is switched OFF immediately after the ACC switch is turned OFF, then power consumption is minimized, but stolen vehicle search cannot be executed
Solution Approach 1:
The system prepares for potential stolen vehicle search operations by maintaining power availability until the predetermined period expires. When position information requests are received during this window, the system is already powered and ready to transmit immediately. The predetermined period acts as a preliminary preparation window that balances immediate power-off savings with readiness for potential search operations
Data Source
AI summary
An incoming call waiting date and time is specified to exceed a time when a predetermined period passes after an ACC switch of an in-vehicle emergency call apparatus is switched from ON to OFF. In this case, a low power operation is continued in the in-vehicle emergency call apparatus until the incoming call waiting date and time, even after the predetermined period passes from when the ACC switch is switched from ON to OFF. Even after the predetermined period passes from when the ACC switch is switched from ON to OFF, a position information signal can be thereby transmitted to a service center based on a reception of a positional information request signal from the service center. Thus, a stolen vehicle search can be executed appropriately.