Vehicle Door Unlocking via Device-Specific RSSI Distance Mapping

The patent applies local quality by creating device-specific mapping relationships tailored to each mobile terminal's characteristics. Instead of using a single general mapping relationship for all devices, the system generates customized mapping relationships that account for variations in antenna performance, housing material, and transmission power of specific device models, thereby improving distance detection accuracy while maintaining implementation feasibility through automated calibration procedures

The patent implements parameter changes by dynamically adjusting the mapping relationship parameters based on actual RSSI measurements at known reference positions. The system calibrates the mapping relationship by measuring RSSI values at predetermined distances from the vehicle and using these measurements to optimize the mapping parameters for each specific mobile terminal device, thus adapting the system to individual device characteristics

The patent applies preliminary action by pre-establishing reference positions at known distances from the vehicle before the actual unlocking operation. The system performs calibration measurements at these predetermined reference positions to obtain RSSI values, then uses these pre-collected data points to generate accurate device-specific mapping relationships. This preliminary calibration process simplifies the overall system by automating the adaptation to each device without requiring complex real-time adjustments during unlocking

The patent implements feedback by using the measured RSSI values at reference positions to continuously optimize and update the mapping relationship. The system compares the actual RSSI measurements with expected values and adjusts the mapping parameters accordingly, creating a closed-loop calibration process that improves accuracy while maintaining manageable system complexity through iterative refinement