In-Vehicle Localization System for BLE Enabled Devices

This paper proposes an in-vehicle localization system for Bluetooth low-energy (BLE) enabled devices to improve passive-entry passive-start functionality.The system includes BLE sensor modules, a fusion processor, a telematics unit, and a Firebase server integrated with a user-friendly mobile app.The BLE modules are located at the optimal positions in the vehicle to monitor the received signal strength indication (RSSI) from the user's mobile phone.The fusion unit processes the RSSI readings using the Kalman filter and the trilateration techniques and then calculates the accurate position of the mobile device to the vehicle.The telematics unit communicates with the Firebase server for user login and access control.The mobile application features include setting up accounts, verifying identities, and interacting with a vehicle via the BLE.The proposed system ensures vehicle security and allows authorized users to unlock/lock doors and control the vehicle.The experimental results showed that the developed key achieves safe vehicle access and control, and enables integration with the smart vehicles.