Weighted Location Parameter for Wireless Access Control
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Solution Overview
Problem
Existing area-restricted access systems face challenges in accurately locating user devices and determining their position status within a service area, leading to suboptimal access control and user experience.
Innovation Solution
The system employs two types of wireless signals (e.g., Wi-Fi and Bluetooth) to generate a modified location parameter, increasing the weight of the second location parameter as the user device approaches the service area, thereby improving localization accuracy and determining access authorization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single type of wireless signal is used for location determination, then the system complexity is low, but the localization accuracy is insufficient
Solution Approach 1:
The patent combines multiple types of wireless signals (Wi-Fi and Bluetooth) into a unified location determination system. The access device uses Wi-Fi signals for initial location estimation while service devices use Bluetooth signals for refined location measurement. These multiple signal sources are merged through a weighted average calculation to produce a modified location parameter, thereby improving localization accuracy without requiring a completely separate system for each signal type.
Solution Approach 2:
The access device and service devices are designed to perform multiple functions: they not only provide wireless network access and service functions, but also serve as location determination nodes. The same devices that provide Wi-Fi and Bluetooth connectivity are also used for localization, eliminating the need for dedicated positioning infrastructure and reducing overall system complexity while maintaining high accuracy.
2Measurement precision
If threshold boundaries are set close together for precise area determination, then the localization accuracy improves, but the user experience deteriorates due to frequent access status changes
Solution Approach 1:
The patent introduces a buffer zone (first area) between the service area boundary and the actual access decision boundary (second area). When a user device enters the first area but not yet the second area, the system maintains the previous access status rather than immediately changing it. This cushioning mechanism prevents frequent toggling of access permissions that would occur with tightly spaced thresholds, thereby improving user experience while still maintaining precise control over the actual service access boundaries.
Solution Approach 2:
The system performs preliminary location assessment using the first threshold boundary to determine when a user device enters the buffer zone (first area). This preliminary action triggers preparation for potential access status change, but the actual access permission is only granted or revoked when the device crosses the second threshold boundary into the service area, allowing the system to anticipate and prepare for status changes while avoiding premature reactions to boundary crossings.
3Reliability
If the first location parameter is used for access control, then the system is simple to implement, but the access control reliability is insufficient
Solution Approach 1:
The patent introduces a modified location parameter as an intermediary between the raw location measurements (first and second location parameters) and the final access control decision. This modified parameter is calculated as a weighted average of the Wi-Fi-based first location parameter and Bluetooth-based second location parameter. The intermediary processing step combines multiple independent location measurements to produce a more reliable basis for access control, reducing the impact of errors in any single measurement while adding only moderate computational complexity.
Solution Approach 2:
The system continuously monitors both the first location parameter (from access device) and the second location parameter (from service devices), and dynamically adjusts the weighted average calculation based on the relative accuracy and availability of each signal source. This feedback mechanism ensures that the most reliable location data is always prioritized in determining access permissions, improving access control reliability while adapting to changing environmental conditions and signal qualities.
Data Source
AI summary
An area restricted access system, method, and non-transitory computer-readable storage medium are provided. The system includes an access device and a first service device located in a service area, wherein the access device locates a user device via a first type of wireless signals and obtains a first location parameter. The first service device monitors and locates the user device via a second type of wireless signals and obtains a second location parameter. The area restricted access system generates a modified location parameter based on the first and the second location parameters and determines whether the user device is within or out of the service area based on the modified location parameter. The first service device allows the user device to access the first service device when the user device is within the service area, and forbids the user device to access the first service device when the user device is out of the service area.