Vehicle Power Mode Control for BLE Passive Entry Wake-Up
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Solution Overview
Problem
Vehicles require increasing computing power for complex functions, leading to unnecessary power consumption by controllers when not in use, which can inconvenience users by requiring manual unlocking or waiting for controllers to wake up.
Innovation Solution
Implementing a system that manages power modes by initiating a wake-up action for controllers when a user's device is within a certain distance from the vehicle, using Bluetooth Low Energy (BLE) for detection, and initiating a welcome action upon closer proximity, including unlocking doors and turning on lights or sounds, to reduce power consumption without affecting user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If controllers are kept in active state to provide immediate response, then user experience is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary actions by detecting user approach via Bluetooth Low Energy (BLE) before the user actually reaches the vehicle. When the user's mobile device is detected within a threshold distance, the system proactively wakes up controllers and prepares systems in advance, so that by the time the user arrives, everything is ready for immediate use. This eliminates the need to keep controllers continuously active while still providing instant response.
Solution Approach 2:
The system dynamically adjusts controller states based on real-time user proximity detection. Controllers transition between sleep and active states depending on whether a user is detected nearby via BLE. This dynamic state management allows the system to optimize power consumption by keeping controllers in low-power mode when not needed, while ensuring they become active promptly when a user approaches, thus resolving the contradiction between continuous readiness and power savings.
2Use of energy by moving object
If controllers are turned off to reduce power consumption, then energy efficiency is improved, but wake-up time increases
Solution Approach 1:
The system performs preliminary wake-up actions based on predicted user arrival time. By detecting the user's approach through BLE technology at a threshold distance, the system initiates controller wake-up sequences in advance, ensuring that controllers are fully operational before the user reaches the vehicle. This preliminary action eliminates the perceived wake-up delay while still allowing controllers to remain in low-power states for extended periods.
Solution Approach 2:
The system implements dynamic wake-up scheduling where controllers transition from sleep to active states based on real-time proximity detection. When a user's mobile device is detected within the threshold distance, the system dynamically triggers the wake-up sequence, optimizing the balance between power consumption and readiness time. This dynamic approach ensures controllers wake up exactly when needed rather than maintaining continuous operation or using fixed schedules.
3Reliability
If multiple controllers are activated simultaneously, then system readiness is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary, staged activation of controllers based on user proximity detection. When a user approaches within threshold distance, the system begins waking up controllers in a coordinated sequence rather than all at once or all at the same time. This preliminary staged activation ensures all necessary controllers are ready before the user arrives, while spreading out the power consumption over time rather than creating a power spike.
Solution Approach 2:
The system dynamically coordinates controller activation based on real-time user proximity. Instead of simultaneous activation, controllers are activated in a dynamically managed sequence triggered by BLE detection. The system monitors which controllers need to be active and activates them in an optimized order, balancing the need for complete system readiness with minimized power consumption during the transition from sleep to active states.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces unnecessary power consumption by transitioning controllers between sleep and active states based on user proximity, ensuring vehicle systems are ready for use without delay while conserving energy when not in use, enhancing user convenience and battery life.
Implementation Method 1
using Bluetooth Low Energy (BLE) for detection
Data Source
AI summary
Systems and methods are provided for controlling power modes of a vehicle and for providing passive entry to the vehicle. A sleep command can be sent from a central controller to multiple domain controllers to enter a sleep state. When the sleep command is received by a first domain controller, a sleep state is entered. When the sleep command is received by a second domain controller, a stealth state is entered. While in the stealth state, the second domain controller periodically wakes up from a sleep state to monitor a condition. In response to detecting a first condition, the second domain controller returns to the sleep state. In response to detecting a second condition, the second domain controller sends a notification of the second condition to the central controller.