Remote Parking Touch Challenge to Prevent Dead-Man Switch Freeze
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Solution Overview
Problem
Existing Dead Man's Switch (DMS) solutions for remotely controlling vehicles during parking or unparking are prone to failure, particularly when users freeze in dangerous situations, leading to unintentional vehicle movements.
Innovation Solution
A method and system that utilize a remote device interacting with a vehicle system through a challenge-response authentication, where the remote device sends touch screen position data as a response to a challenge, and the vehicle system validates this response to control the vehicle's movement or braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple button press is used as DMS challenge, then ease of operation is improved, but reliability deteriorates because users may freeze and hold the finger on the screen instead of releasing it
Solution Approach 1:
The patent changes the parameter of the challenge from a static button press to a dynamic sequence of touch actions with specific temporal and spatial characteristics. The challenge requires multiple touch events within a predetermined time frame, transforming a simple spatial parameter (button position) into a combination of spatial and temporal parameters that are harder to freeze on but easier to perform naturally.
Solution Approach 2:
The patent implements periodic action by requiring a sequence of touch events (first touch, second touch, third touch) within a predetermined time period. This creates a rhythmic, periodic interaction pattern that naturally progresses through stages, making it difficult for users to freeze mid-action while maintaining simplicity of individual gestures.
2Reliability
If a complicated challenge-response sequence is used, then reliability is improved to avoid unintentional responses, but ease of operation deteriorates requiring too much user attention on the screen
Solution Approach 1:
The patent applies partial action by requiring only three specific touch events within a time window rather than continuous monitoring or complex sequences. This partial fulfillment requirement (3 touches out of potentially many possible touches) provides sufficient reliability validation without demanding excessive user attention, allowing users to perform the challenge peripherally while monitoring the vehicle surroundings.
Solution Approach 2:
The system provides immediate feedback to the user about whether their touch sequence is being registered and whether they are progressing toward completing the challenge. This feedback mechanism reassures users that their simple touch actions are being properly received, reducing the need for excessive attention to the screen while maintaining reliable authentication.
3Reliability
If continuous monitoring of user input is required, then reliability is improved, but loss of time increases and user attention is diverted from surroundings
Solution Approach 1:
The patent uses periodic action with a predetermined time window for completing the touch sequence challenge. Instead of continuous monitoring, the system activates a time-limited challenge period during which a specific number of touches must occur. This periodic, time-bounded approach provides reliable validation while minimizing total time loss and allowing users to quickly complete the challenge while maintaining awareness of surroundings.
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3~5
AI summary
A method for a vehicle system to assist to remotely parking or unparking a vehicle, the method comprising transmitting, to a remote device, a challenge request, determining, by the vehicle system, whether a challenge response to the challenge request has been received from the remote device, wherein the challenge response comprises information about a touch position on a touch screen of the remote device wherein a touch input has been received, if the challenge response is received, determining, by the vehicle system, whether the challenge response is valid, if the challenge response is valid, controlling the vehicle to move, and if the challenge response is not valid, controlling the vehicle to brake, wherein the challenge response is valid if the touch position indicates that the touch input is an expected rub movement performed on a valid area of the touch screen.