Cross-Protocol Device Reconnection Using Stored Encryption Keys
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Solution Overview
Problem
High power consumption in input devices due to frequent broadcasting of signals for fast pairing with touch devices during touch input operations.
Innovation Solution
Implementing a method where devices establish a second channel connection using a locally stored encryption key after a previous connection, and prohibiting broadcasting of initiation signals based on indication information in a first signal with different transmission protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the input device broadcasts signals for fast pairing each time it contacts the touch device, then the pairing process can be completed quickly, but the power consumption of the input device increases significantly
Solution Approach 1:
The system performs preliminary actions by pre-storing encryption keys and connection information in both devices before actual connection is needed. When a touch input operation occurs, the input device checks whether it has previously connected to the touch device and retrieves the stored encryption key, eliminating the need for real-time key exchange and signal broadcasting, thus reducing power consumption while maintaining fast pairing capability
Solution Approach 2:
The patent applies copying by creating a copy of the encryption key and connection information in the input device's local memory. Instead of exchanging keys in real-time during each touch operation, the input device uses the copied key information to establish connections, significantly reducing the need for repeated signal broadcasting and key exchange operations
2Reliability
If the input device repeatedly exchanges encryption keys and broadcasts signals during touch input operations, then connection establishment can be ensured, but the connection efficiency decreases due to redundant operations
Solution Approach 1:
The system performs preliminary actions by pre-storing encryption keys and connection information in both devices before actual connection is needed. When a touch input operation occurs, the input device checks whether it has previously connected to the touch device and retrieves the stored encryption key, eliminating the need for real-time key exchange and signal broadcasting, thus reducing power consumption while maintaining fast pairing capability
Solution Approach 2:
The input device performs self-service by autonomously checking its local storage for previously stored encryption keys and connection information. When a touch input operation occurs, the input device independently determines whether to proceed with key exchange or use stored credentials, eliminating the need for repeated key exchange and signal broadcasting operations
Data Source
AI summary
A method for connecting devices, applied to a first device, includes receiving a first signal sent by a second device via a first channel, wherein the first signal is generated by the second device based on a touch input operation of the first device, determining that the first signal includes first indication information, and prohibiting broadcasting a second channel connection initiation signal, wherein the first indication information indicates that the first device previously established a second channel connection with the second device, and establishing a second channel connection with the second device based on a stored locally encryption key, wherein the encryption key was received by the first device from the second device when the first device previously established the second channel connection with the second device, and the first channel and a second channel have different transmission protocols.