Digital Key Device Signal Correction via Server Retrieval
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Solution Overview
Problem
Existing information processing devices, such as smartphones, face challenges in accurately determining the distance to a vehicle using signal strength due to performance differences among various mobile device models, making it difficult to store correction value information for all models, especially when used as digital keys for vehicles.
Innovation Solution
The information processing device acquires signal strength correction value information from a server device based on its model and sends it to the vehicle, allowing the vehicle to accurately determine the operating area without needing to store correction value information for all models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction value information is stored beforehand in the information processing device for all mobile device models, then distance determination accuracy is improved, but device memory requirements and complexity increase significantly
Solution Approach 1:
The correction value information is extracted from the information processing device and stored externally on the server device. The device only stores minimal identification information about its model, while the actual correction data is retrieved on-demand from the server, significantly reducing local memory requirements while maintaining accuracy.
Solution Approach 2:
A server device acts as an intermediary between the information processing device and the vehicle. The server stores comprehensive correction value information for all mobile device models and provides the appropriate correction data to the vehicle when needed, eliminating the need for each device to store all correction data locally.
2Adaptability or versatility
If the information processing device stores all correction value information by model, then compatibility with all device models is improved, but the difficulty of managing and updating correction data increases
Solution Approach 1:
The burden of storing and managing comprehensive correction value information is extracted from the information processing device and placed on the server device. This allows the device to maintain compatibility with all models through cloud-based data retrieval rather than local storage, greatly simplifying data management and enabling easy updates.
Solution Approach 2:
The system transitions from a static local storage model to a dynamic cloud-based retrieval model. Correction value information can be updated on the server without requiring device updates, allowing the system to adapt to new device models and maintain compatibility dynamically.
3Speed
If the vehicle determines distance using signal strength without model-specific correction, then processing speed is improved, but distance determination accuracy deteriorates
Solution Approach 1:
The correction value information is prepared and stored on the server in advance for all device models. When distance determination is needed, the vehicle can quickly retrieve the appropriate correction factor based on the device model identification, maintaining fast processing while improving accuracy through pre-prepared correction data.
Data Source
AI summary
An information processing device utilizable as a digital key for a vehicle, the information processing device includes a memory; and a processor coupled to the memory. The processor is configured to in a case in which the processor does not have signal strength correction value information corresponding to a model of the information processing device, the correction value information being used by the vehicle when determining a distance between the vehicle and the information processing device in processing pertaining to the digital key for the vehicle, acquire the correction value information from a server device, and send the acquired correction value information to the vehicle.