Vehicle Digital Key Prioritization Using BLE and UWB
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Solution Overview
Problem
Existing digital key systems struggle to simultaneously measure the locations of multiple digital keys accurately, leading to potential delays in vehicle control operations when the wrong key is prioritized.
Innovation Solution
A vehicle control device utilizing a communication circuit, processor, and memory to establish wireless communication with external terminals using Bluetooth or Bluetooth low energy (BLE) for signal strength measurement, and ultra-wideband (UWB) for location monitoring, prioritizing terminals based on signal strength and distance from trigger events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vehicle simultaneously measures locations of multiple digital keys, then all digital keys can be recognized, but the system cannot handle multiple digital keys at the same time causing delays
Solution Approach 1:
The system performs preliminary actions by determining priorities of multiple digital keys before location measurement. The processor identifies which digital key has the highest priority based on predetermined criteria, then focuses location measurement on that key first. This preliminary prioritization prevents delays by ensuring the most relevant key is measured immediately, while other keys are handled in sequence.
Solution Approach 2:
The system segments the location measurement process by dividing it into priority-based stages. Instead of attempting to measure all digital key locations simultaneously, the processor divides the task into sequential measurements based on priority levels. This segmentation allows the system to handle multiple digital keys adaptably while avoiding the bottleneck of simultaneous measurement attempts.
2Reliability
If the vehicle monitors locations of all external terminals, then no digital key is missed, but the processing time and system resources increase
Solution Approach 1:
The system applies partial action by monitoring locations of external terminals selectively rather than all at once. Based on determined priorities, the processor focuses location monitoring on the highest priority terminal first, ensuring reliable recognition of the most relevant digital key. This partial monitoring approach maintains productivity by avoiding the overhead of simultaneously tracking all terminals, while still ensuring no critical key is missed through the prioritization mechanism.
3Device complexity
If the system uses a single communication protocol for all operations, then the system is simpler, but it cannot efficiently establish communication and monitor locations separately
Solution Approach 1:
The system segments communication functions by using different communication protocols for different purposes. A first communication protocol is used for establishing initial communication with external terminals, while a second communication protocol is used specifically for monitoring locations. This functional segmentation improves ease of operation and efficiency, as each protocol can be optimized for its specific task, while the overall complexity is managed through clear separation of concerns.
Solution Approach 2:
The communication circuit is designed with multi-functionality to support multiple communication protocols. The same hardware circuit can switch between different protocols depending on the operational requirement - using the first protocol for initial communication establishment and the second protocol for location monitoring. This universality allows the system to maintain relatively simple hardware while achieving efficient differentiated communication operations.
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
This approach efficiently determines the location of digital keys likely to be used for vehicle control, reducing delays by prioritizing and monitoring key locations in real-time, enabling precise and timely vehicle operations.
Implementation Method 1
establishing wireless communication with a plurality of external terminals including the external digital key via the communication circuit using a first communication protocol
Implementation Method 2
recognizing a received signal strength for each of the plurality of external terminals via the wireless communication
Implementation Method 3
monitors a location of at least one of the plurality of external terminals based on the respective priorities using a second communication protocol
Data Source
AI summary
A device for controlling a vehicle includes a communication circuit, a processor, and a memory, and the processor recognizes a trigger event for recognizing an external digital key corresponding to the vehicle, establishes wireless communication with a plurality of external terminals including the external digital key via the communication circuit using a first communication protocol, recognizes a received signal strength for each of the plurality of external terminals via the wireless communication, determines respective priorities of the plurality of external terminals based on the received signal strengths, and monitors a location of at least one of the plurality of external terminals based on the respective priorities using a second communication protocol via the communication circuit.