Optical Wake-Up Signaling for Secure Activation of Sleeping Devices
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Solution Overview
Problem
Existing devices often remain in a quiescent state and require efficient methods to wake them up, especially in scenarios where traditional power-on mechanisms are not feasible or timely.
Innovation Solution
A programmable signaling light source with a processor and memory that uses modified Morse code to encode and transmit messages, including an authentication part, to wake up devices by sending light signals of specific durations and intensities, ensuring secure activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional power-on mechanisms are used, then devices can be activated, but they are not feasible or timely in certain scenarios
Solution Approach 1:
The patent replaces traditional mechanical or electrical power-on mechanisms with an optical signaling system using light sources to communicate wake-up commands to quiescent devices, enabling activation in scenarios where conventional methods are not feasible or timely
Solution Approach 2:
The patent introduces light signals as an intermediary medium to transmit activation commands from the signaling device to the quiescent device, allowing communication without direct physical or electrical connection
2Reliability
If light signals are sent to wake up devices, then activation is achieved, but secure verification is required
Solution Approach 1:
The patent implements a feedback mechanism where the signaling device sends an authentication challenge in plain text, receives a response from the quiescent device, verifies it against the expected authentication value, and only then proceeds with the wake-up command, ensuring secure verification
Solution Approach 2:
The patent divides the communication protocol into distinct segments: authentication challenge phase, authentication response phase, and wake-up command phase, allowing for clear verification steps before activation
3Reliability
If messages are transmitted repeatedly, then reliable delivery is ensured, but energy is consumed
Solution Approach 1:
The patent employs periodic transmission of light signals at specific intervals and durations, allowing the quiescent device to detect and process wake-up commands reliably while minimizing continuous energy consumption by the signaling device
Solution Approach 2:
The patent varies light signal parameters such as duration, intensity, and timing patterns to encode different message types and authentication values, enabling reliable communication through controlled parameter changes rather than continuous transmission
Data Source
AI summary
After installation, a device may be asleep. A light signal device may send a message to the sleeping device to wake it up. This wake-up message may comprise the light signal device sending programmed light signals, the programmed light signals in modified morse code. An authentication part may also be included in the message. The light signal device may request an authentication message from the sleeping device.