Authentication Management Using IMU and Radar Sensors
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Solution Overview
Problem
Current authentication techniques for user equipment, such as smartphones, often fail to quickly and accurately authenticate users while conserving power, leading to inefficiencies and battery drain, especially with frequent user interactions.
Innovation Solution
The use of inertial sensor data from an Inertial Measurement Unit (IMU) and radar data to manage authentication by determining a user's intent to engage with their device, allowing for the efficient alteration of power states of authentication system components to reduce latency and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional authentication techniques are used, then authentication can be performed, but the process consumes excessive power and time
Solution Approach 1:
The system performs preliminary actions by detecting user intent through IMU and radar sensors before authentication is formally triggered. The IMU sensor detects device pickup motion, and the radar sensor detects hand approach, allowing the system to prepare authentication components in advance and switch them from low-power to high-power states proactively, reducing both power waste and authentication delay
Solution Approach 2:
The system dynamically adjusts the power states of authentication components based on real-time sensor inputs. The processor continuously monitors IMU and radar data to determine when to transition authentication components between low-power and high-power states, creating a dynamic power management system that adapts to user behavior patterns
2Speed
If authentication components remain in high-power state, then authentication speed is improved, but power consumption increases
Solution Approach 1:
The system uses periodic sensing with IMU and radar detectors to monitor user presence and intent. Rather than keeping authentication components continuously powered, the system periodically checks for authentication triggers through sensor data and activates high-power authentication modes only during detected user interaction periods, creating a rhythmic on-demand power consumption pattern
Solution Approach 2:
The system replaces traditional mechanical or manual authentication triggering with sensor-based detection. IMU sensors detect device pickup acceleration patterns, and radar sensors detect hand approach velocity and distance, substituting passive user actions with active sensor-driven authentication initiation that automatically manages power states
3Measurement precision
If sensor-based intent detection is implemented, then authentication accuracy is improved, but device complexity increases
Solution Approach 1:
The system segments the authentication detection function across multiple specialized sensors rather than using a single complex sensor. The IMU sensor handles device pickup detection through acceleration and orientation data, while the radar sensor handles hand approach detection through distance and velocity measurements, dividing the authentication accuracy task into separate sensor domains that can be processed independently
Solution Approach 2:
The processor performs multiple functions by integrating data from both IMU and radar sensors to determine user intent. The same processing unit that analyzes IMU acceleration data also processes radar distance and velocity data, creating a multi-functional authentication system that achieves high accuracy without proportionally increasing overall system complexity
Data Source
AI summary
This document describes techniques and systems for authentication management through IMU and radar. The techniques and systems use inertial sensor data from an inertial measurement unit (IMU) and/or radar data to manage authentication for a computing device. By so doing, the techniques conserve power, improve accuracy, or reduce latency relative to many common techniques and systems for computing-device authentication.