Dynamic RSSI Threshold for Hands-Free Access Control
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Solution Overview
Problem
Conventional access control systems using wireless devices face challenges in efficiently determining proximity and granting access to secured areas due to variability in signal strength and sensitivity, leading to potential security breaches and user inconvenience.
Innovation Solution
The method involves receiving and storing signal strength thresholds, determining received signal strength indications (RSSI) for RF advertisements from access control devices, and transmitting messages to indicate proximity, with adjustable sensitivity settings and encryption for secure access, allowing access control devices to grant access based on predefined criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal strength thresholds are used to determine proximity for access control, then access security is improved, but false rejections occur due to signal variability
Solution Approach 1:
The system dynamically adjusts the signal strength threshold based on historical data and environmental conditions rather than using a fixed threshold. This allows the threshold to adapt to varying signal conditions while maintaining security requirements, reducing false rejections caused by static threshold limitations
Solution Approach 2:
The patent changes the parameter from a fixed signal strength threshold to a dynamically adjustable threshold that considers multiple factors including historical proximity data, signal quality metrics, and environmental conditions. This parameter transformation enables more accurate proximity determination while maintaining security
2Reliability
If sensitivity settings are increased to detect closer proximity, then access security is improved, but user convenience deteriorates due to stricter access criteria
Solution Approach 1:
The sensitivity setting is made dynamic rather than static, allowing the system to adjust the effective sensitivity based on user behavior patterns and contextual information. This enables high security when needed while maintaining convenience during normal operations by adapting the proximity detection criteria in real-time
Solution Approach 2:
The system transforms the fixed sensitivity parameter into a multi-level parameter that can be adjusted based on user preferences, environmental context, and security requirements. This allows optimization of both security and convenience by selecting appropriate sensitivity levels for different scenarios
3Device complexity
If fixed proximity thresholds are used for access control, then device complexity is reduced, but adaptability to different environments deteriorates
Solution Approach 1:
The fixed proximity threshold is replaced with a dynamic threshold determination process that automatically adapts to different environments using sensor data, historical information, and machine learning algorithms. This maintains relatively simple device logic while achieving high environmental adaptability through data-driven threshold adjustment
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 enhances security and convenience by accurately determining user proximity and granting access while preventing unauthorized access, using adjustable sensitivity settings and encryption for secure communication.
Implementation Method 1
receiving a first RF advertisement from the first access control device; obtaining a first received signal strength indication (RSSI) for the received first RF advertisement
Implementation Method 2
receiving and storing a first encryption key associated with the first access control device; and encrypting one or more portions of the first RF message based on the first encryption key prior to the transmitting of the first RF message
Data Source
AI summary
A method including receiving and storing a first signal strength threshold associated with obtaining access to a first access control device; receiving a first RF advertisement from the first access control device; obtaining a first received signal strength indication (RSSI) for the received first RF advertisement; determining that the first RSSI is greater than or equal to the first signal strength threshold; and transmitting, in response to the determination that the first RSSI is equal to or greater than the first signal strength threshold, a first RF message to indicate that the transmitting device is proximate to the first access control device.