Ultrasonic Frequency Matching for Secure Conference Device Connection
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Solution Overview
Problem
Conventional ultrasonic wave-based device connection methods fail to establish connections between devices due to the inability of ultrasonic waves to penetrate walls, leading to security measures that prevent devices outside a conference room from obtaining conference numbers and connecting to conference tablets.
Innovation Solution
A method involving a first electronic device sending multiple ultrasonic signals in different bands, each carrying detection information, and a second device decoding these signals to determine a target band for correct decoding, followed by sending connection information in that band to establish a connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultrasonic wave-based connection method is used to ensure security, then devices outside conference room cannot obtain conference number, but connection establishment fails
Solution Approach 1:
The patent segments the ultrasonic communication process into multiple frequency bands. The transmitter sends detection signals across different frequency bands, and the receiver identifies which bands can successfully penetrate walls and carry signals. This segmentation allows the system to adapt to varying wall penetration capabilities at different frequencies, resolving the contradiction between security (blocking ultrasonic waves) and connection reliability (needing ultrasonic wave transmission).
Solution Approach 2:
The patent changes the frequency parameter of ultrasonic signals dynamically. By transmitting detection signals across multiple frequency bands and identifying the optimal band for wall penetration, the system adjusts the operating frequency to achieve both security (maintaining ultrasonic frequency range) and connection reliability (selecting frequencies that can penetrate walls).
2Reliability
If single band ultrasonic signal is used for connection, then transmission is simple, but connection fails due to frequency response mismatch
Solution Approach 1:
The patent divides the ultrasonic signal transmission into multiple frequency bands, with each band carrying detection information. The receiver decodes signals from different bands to determine the optimal frequency response match. This segmentation enables the system to overcome frequency response mismatch issues while maintaining manageable complexity through structured multi-band transmission.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver decodes detection signals from multiple frequency bands and provides feedback about which bands were successfully received. The transmitter uses this feedback to identify the target band with the best frequency response match and sends connection information through that specific band, ensuring reliable connection establishment.
3Reliability
If manual entry of conference number is used, then connection can be established, but security is compromised
Solution Approach 1:
The patent replaces the manual mechanical entry method with an automated ultrasonic wave-based transmission system. Instead of manually typing conference numbers, the system uses ultrasonic signals to automatically transmit connection information from the conference room tablet to external devices, maintaining security while improving ease of operation.
Solution Approach 2:
The patent introduces ultrasonic waves as an intermediary medium for secure information transmission. The conference number and connection information are encoded into ultrasonic detection signals that can be transmitted through walls, serving as a secure intermediary channel that replaces both manual entry and traditional wireless transmission methods.
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
Ensures secure and efficient device connection by identifying the correct frequency response of the second device, allowing it to decode ultrasonic signals and join conferences or implement screen projection.
Implementation Method 1
the first electronic device sends a detection signal, where the detection signal includes a plurality of ultrasonic signals, each of the plurality of ultrasonic signals is in a different band
Implementation Method 2
determines a target band from the plurality of different bands. The feedback message indicates decoded information obtained by the second electronic device by decoding the ultrasonic signal in each band
Data Source
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AI summary
An ultrasonic wave-based device connection method is applied to device connection in a conference scenario or a screen projection scenario. In the method, a first electronic device sends a plurality of ultrasonic signals that respectively carry detection information and that are in different bands, and obtains decoded information that is obtained by decoding each ultrasonic signal and that is fed back by a second electronic device. Detection information corresponding to each of the plurality of ultrasonic signals is compared with the decoded information, to determine a target band in which the second electronic device can correctly decode an ultrasonic wave, and then connection information is sent by using an ultrasonic wave in the target band, so that the second electronic device establishes a connection to the first electronic device based on the connection information. This effectively ensures that all devices having different frequency responses can establish a connection between devices based on an ultrasonic signal.