UWB Entry Authentication with Radar-Triggered Wake-Up Control
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Solution Overview
Problem
UWB-based entry systems consume a significant amount of power due to continuous communication and ranging operations, which reduces the battery life of authentication devices and increases overall power consumption.
Innovation Solution
An entry system that uses UWB communication nodes in radar mode to detect the presence of an authentication device via radar signals, transmitting a wake-up signal only when the device is in proximity, thereby reducing unnecessary power usage, and employs a processing unit to manage ranging operations and authentication processes efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UWB communication nodes continuously perform ranging operations to ensure secure authentication, then authentication security is improved, but power consumption increases
Solution Approach 1:
The system transitions from continuous ranging operations to periodic action by using radar mode for initial detection, then only performing UWB ranging operations when an authentication device is actually detected. This periodic approach maintains security by performing ranging when needed while reducing power consumption by avoiding continuous operations.
Solution Approach 2:
The radar mode performs preliminary detection of the authentication device before initiating full UWB ranging operations. This preliminary action allows the system to prepare for authentication only when necessary, reducing unnecessary power consumption while maintaining security protocols.
2Reliability
If the RF communication unit continuously transmits wake-up signals to maintain connection, then communication reliability is improved, but power consumption of the authentication device increases
Solution Approach 1:
The RF communication unit uses periodic action by transmitting wake-up signals only after radar detection confirms the presence of an authentication device. This eliminates continuous transmission while maintaining communication reliability when needed, significantly reducing power consumption and extending battery life.
Solution Approach 2:
The system extracts the wake-up signal transmission from continuous operation and only performs it when necessary, based on radar detection results. This separation allows the system to maintain communication reliability when needed while eliminating unnecessary power consumption during normal operation.
3Reliability
If UWB ranging operations are performed frequently to prevent relay attacks, then security against relay attacks is improved, but device complexity and power consumption increase
Solution Approach 1:
The system implements periodic UWB ranging operations only when radar detection indicates an authentication device is present. This maintains security against relay attacks by performing ranging when needed while reducing the frequency of operations to minimize complexity and power consumption.
Solution Approach 2:
The radar mode serves as an intermediary detection layer between continuous monitoring and full UWB ranging operations. This intermediary approach simplifies system operation by using a low-power radar mode for initial detection, reducing the complexity of managing continuous high-power UWB operations while maintaining security.
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 significantly reduces power consumption in both the entry system and the authentication device by minimizing unnecessary wake-ups and signal transmissions, while maintaining secure authentication and ranging operations.
Implementation Method 1
one or more ultra-wideband (UWB) communication nodes configured to operate in a radar mode, wherein the nodes are configured to receive one or more radar signals reflected by an external object
Implementation Method 2
receive one or more radar signals reflected by an external object
Data Source
AI summary
An entry system is provided that includes a radio frequency (RF) communication unit configured to transmit a wake-up signal to an external authentication device, one or more ultra-wideband (UWB) communication nodes configured to operate in a radar mode, wherein the nodes are configured to receive one or more radar signals reflected by an external object when operating in the radar mode, and a processing unit configured to cause the RF communication unit to transmit the wake-up signal if the UWB communication nodes receive the radar signals.