Conditional Wireless Device Search for Vehicle Access
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Solution Overview
Problem
Existing vehicle systems using BLUETOOTH low energy modules (BLEM) for wireless device authentication often fail to accurately locate authorized devices due to antenna arrays not being powered, leading to user frustration and power inefficiencies, as they may return 'device not found' results even when devices are nearby, necessitating repeated requests and potentially blocking higher priority searches.
Innovation Solution
Implementing a method where the BLEM continues to send search requests based on real-time antenna and vehicle state information, selectively repeating searches when the antenna array is not fully powered, and using a timer to manage search requests to avoid unnecessary power drain and user inconvenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the BLEM sends repeated search requests when the antenna array is not fully powered, then the authentication accuracy is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the search repetition behavior based on the real-time power state of the antenna array. When the antenna array is not fully powered, the BLEM selectively repeats search requests to improve authentication accuracy. When the antenna array is fully powered, the BLEM avoids unnecessary repetitions to conserve power. This dynamic adaptation resolves the contradiction between authentication accuracy and power consumption.
2Reliability
If the BLEM continuously sends search requests to ensure accurate device location, then the reliability of authentication is improved, but the time for higher priority searches is delayed
Solution Approach 1:
The BLEM monitors the power state of the antenna array and uses this feedback to control search request repetition. When the antenna array is not fully powered, the system repeats search requests to ensure reliable authentication. When the antenna array is fully powered, the system stops repetition to avoid delaying higher priority searches. This feedback mechanism resolves the contradiction between authentication reliability and search timing.
3Ease of operation
If the BLEM repeats search requests when the antenna array is not powered, then the user experience is improved, but the system complexity increases
Solution Approach 1:
The system checks the power state of the antenna array before sending search requests and selectively repeats requests based on this preliminary assessment. This approach improves user experience by ensuring accurate device location detection when the antenna is not fully powered, while avoiding unnecessary complexity by only implementing conditional repetition logic rather than continuous complex monitoring and adjustment mechanisms.
Data Source
AI summary
A vehicle includes a search system including at least one antenna, a wireless transceiver control module, and a processor. The processor receives a vehicle access request. The processor then sends a search instruction to the wireless transceiver control module to search for an authorized wireless device within a predefined distance of the vehicle. The processor receives a response, to the request, from the wireless transceiver control module indicating search results and a state indicator indicating a state of the search system. When the state indicator indicates a state predefined as corresponding to a final result state for fulfilling the request, the processor utilizes the search results to determine if the access request should be granted and when the state indicator indicates a state predefined as corresponding to an in-progress state, which will result in an improved response at a future time, the processor re-instructs the search and repeats response reception.