Visual Pairing of Mobile Devices via Dynamic QR Codes
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Solution Overview
Problem
Current methods for establishing wireless communication channels between devices, such as Wi-Fi and Bluetooth, are complex and not user-friendly, especially for quick and safe data transfer, and do not support high data rates or automatic disconnection, while prior solutions are limited to Bluetooth and require personal information disclosure.
Innovation Solution
A system and method for visual pairing using dynamic images displayed on one device's screen and decoded by another's camera to establish open wireless communication channels, enabling quick, safe, and high-rate data transfer without requiring personal details, and allowing automatic disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional wireless connection methods (Wi-Fi, Bluetooth) are used, then data transfer capability is achieved, but the connection establishment procedure becomes complicated requiring multiple steps and user configuration
Solution Approach 1:
The patent replaces manual configuration procedures with optical recognition. Instead of requiring users to navigate through multiple menu steps and configure settings, the system uses a camera to capture an image containing connection information, which is then automatically decoded and processed to establish the wireless connection. This substitutes the mechanical interaction of button-pressing and menu-navigation with an optical field-based information transfer method.
Solution Approach 2:
The patent introduces an intermediary image that contains encoded connection information. This image acts as a mediator between two devices, carrying all necessary connection parameters (SSID, password, authentication type) in visual form. The camera captures this intermediary image, and software automatically extracts the connection details, eliminating the need for manual configuration steps.
2Productivity
If Bluetooth protocol is used for wireless connection, then device compatibility is achieved, but data transfer rate is limited and cannot support large files
Solution Approach 1:
The patent implements dynamic protocol selection based on the type of data being transferred. The system automatically determines whether to use Wi-Fi or Bluetooth connectivity based on file size and transfer requirements. For large files requiring high bandwidth, Wi-Fi is selected; for small data exchanges, Bluetooth suffices. This dynamic adaptation resolves the contradiction between transfer rate and protocol versatility.
3Loss of time
If visual pairing methods are used, then connection establishment becomes quick and intuitive, but support for Wi-Fi protocol is limited in prior solutions
Solution Approach 1:
The patent creates a universal visual pairing solution that works across multiple wireless protocols including both Wi-Fi and Bluetooth. The image-based pairing mechanism is protocol-agnostic, meaning the same visual interface and camera-based capture method can establish connections for different types of wireless networks. This multi-functionality allows quick connection establishment while supporting diverse wireless protocols simultaneously.
4Reliability
If static barcodes are used for connection, then simplicity is achieved, but security is compromised and data completeness is limited
Solution Approach 1:
The patent transitions from static barcodes to dynamic QR codes that change with each connection attempt. Each QR code contains a unique session identifier and is valid only for a specific time window or single use. This dynamic nature prevents replay attacks and ensures that even if a code is captured, it cannot be reused. The increased complexity of the code structure enables significantly enhanced security while maintaining ease of use through camera capture.
Data Source
AI summary
System and method for visual pairing between wireless devices, according to which a first software component is installed on a first WCD with a display screen and a second software component is installed on a second WCD having a camera and then a request to establish an open WCC is sent from the second WCD to the first WCD. If the request is approved by the first WCD, an image with graphically encoded unique one-time information is generated on the display screen using the first software. The image is captured by the camera and the information is decoded in the captured image by using the second software component. This information is used to establish an open WCC between the second WCD and the first WCD.