USB Interface Driver Switching for Wireless Interference
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Solution Overview
Problem
The integration of wireless LAN and USB 3.0 in mobile devices leads to interference due to noise generated in the 2.5 GHz band from USB connections, which decreases communication quality, especially in compact device casings where physical separation of components is not feasible.
Innovation Solution
A communication apparatus and method that determines the frequency band used by both the wireless communication and USB interfaces, switching to USB 2.0 mode when interference is detected, to reduce noise and maintain communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If USB 3.0 interface is used for high-speed data transfer, then data transfer speed is improved, but noise in the 2.5 GHz band is generated which interferes with wireless LAN communication
Solution Approach 1:
The patent implements dynamic switching between USB 3.0 and USB 2.0 modes based on real-time detection of wireless LAN usage. When wireless LAN communication is detected, the system automatically switches from USB 3.0 to USB 2.0 mode to eliminate noise interference, and switches back to USB 3.0 mode when wireless LAN is not in use, thereby achieving adaptive optimization of both data transfer speed and wireless communication quality
Solution Approach 2:
The patent changes the operational parameters of the USB interface by switching between different USB standards (USB 3.0 and USB 2.0) based on the frequency band usage of wireless LAN. This parameter change allows the system to adjust the electrical characteristics and noise emission profile of the USB interface to avoid interfering with wireless communication bands
2Adaptability or versatility
If USB connection cable is used for wired connection, then connectivity is improved, but noise is generated from the cable that interferes with wireless LAN quality
Solution Approach 1:
The system dynamically adjusts the USB interface operating mode based on whether wireless LAN communication is active. When a USB connection cable is detected and wireless LAN communication is simultaneously active, the system switches from USB 3.0 to USB 2.0 mode to reduce cable-generated noise, thereby maintaining connectivity while minimizing interference
3Device complexity
If wireless LAN and USB 3.0 are integrated in compact device, then device integration is improved, but physical separation of components cannot be secured leading to interference
Solution Approach 1:
The patent replaces the mechanical/physical solution (spatial separation of USB and wireless LAN components) with an electrical/software-based solution (dynamic mode switching of the USB interface). By detecting wireless LAN frequency band usage and switching USB operating modes accordingly, the system eliminates interference without requiring physical distance between components, thereby maintaining compact device integration
Data Source
AI summary
This invention provides a communication apparatus including a wireless communication unit and an interface conforming to USB 3.0 standard, where the apparatus comprises a first determination unit which determines whether an external device has been connected to the interface; a second determination unit which determines a frequency band used in the wireless communication unit; a discrimination unit which, when it is determined that an external device has been connected to the interface, discriminates whether the frequency of noise generated in the communication with the external device causes interference with the frequency band of the wireless communication determined by the second determination unit; and a control unit which, if the discrimination result indicates that interfere is to be caused, performs control so as to communicate with the external device by driving the interface in accordance with the USB 2.0 standard.