UWB Access Rights Updates for Decentralized Terminals
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Solution Overview
Problem
Existing access control systems face challenges in updating access rights efficiently and cost-effectively, particularly in decentralized systems where access control terminals have limited memory and require frequent updates, and centralized systems incur high wiring costs and single points of failure.
Innovation Solution
An access control terminal equipped with an ultra-wideband transceiver determines the proximity of a mobile device using time difference calculations, transmitting update messages via ultra-wideband, Bluetooth, WLAN, or cellular transceivers to update access rights data seamlessly, even when the user is in motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access control terminals are permanently connected to the server, then access rights can be centrally managed, but wiring costs increase and a single point of failure is created
Solution Approach 1:
The patent extracts the access rights database from the centralized server and stores it locally in the access control terminal's non-volatile memory. This allows the terminal to operate independently without permanent network connection, eliminating the need for complex wiring infrastructure while maintaining access rights management capability through local storage and update mechanisms.
2Ease of operation
If access control devices store the complete access rights table locally, then updates can be performed without server connection, but device memory requirements increase
Solution Approach 1:
The patent segments the access rights data into a compact database structure stored locally in the terminal, separate from the complete access rights table maintained on the server. The local database contains only the necessary access control information for immediate operation, enabling updates without requiring the entire table to be stored, thus reducing memory requirements while maintaining operational independence.
3Device complexity
If access control terminals operate without server connection, then wiring costs are reduced, but access rights updates become cumbersome
Solution Approach 1:
The patent implements a self-service update mechanism where the access control terminal autonomously detects mobile devices within its proximity range using ultra-wideband transceiver, determines distance through time difference calculations, and automatically transmits update messages without requiring manual user interaction or server connection. This enables efficient access rights updates while maintaining operational independence.
4Device complexity
If the access control system uses decentralized architecture, then wiring costs are reduced, but ensuring timely updates becomes difficult
Solution Approach 1:
The patent implements a feedback-based update mechanism where the access control terminal continuously monitors for mobile devices within its operational area using ultra-wideband transceiver distance measurements. When updates are available, the terminal automatically initiates transmission to detected devices, ensuring timely updates without requiring centralized coordination or manual intervention, thus resolving the timing challenge in decentralized architecture.
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
Enables efficient and user-friendly access rights updates without direct user interaction, reducing costs and minimizing single points of failure by decentralizing the access rights database, ensuring seamless updates even when the user is moving.
Implementation Method 1
The electronic circuit is configured to determine the distance using a time difference between transmitting the request message and receiving the response message
Data Source
AI summary
An access control terminal (1), comprising an electronic circuit (11) and an ultra-wide-band transceiver (10) connected to the electronic circuit (11) wherein the electronic circuit (11) exchanges messages with a mobile device (2) to determine a distance (d) of the mobile device (2) from the access control terminal (1), and to transmit to the mobile device (2) one or more update messages configured to update access rights data in the mobile device (2), if the mobile device (2) is within the pre-determined proximity range (P).