Dynamic RFI Avoidance in Wireless Communication Devices
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Solution Overview
Problem
Wireless communication systems face performance degradation or complete inhibition due to radio frequency interference (RFI) from unintentional RF emitting devices, which existing methods struggle to effectively mitigate, especially in dynamic and high-frequency environments like 5GHz ~7 GHz or mmWave Wi-Fi/Cellular frequency bands.
Innovation Solution
Implementing a dynamic RFI avoidance method that identifies potential RFI generating devices, requests them to vacate interfering frequencies, and applies mitigation techniques such as alternative operating points or postponing operations to minimize interference, utilizing a power management controller for real-time communication and handshakes between devices to ensure seamless operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If physical design constraints (shielding, antenna keep out zones, PCB layout rules) are implemented to avoid RFI, then RFI protection is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements dynamic RFI avoidance by continuously monitoring operating frequencies of multiple devices and dynamically adjusting their operating points in real-time. This dynamic frequency coordination eliminates the need for static physical shielding and complex PCB layout constraints, resolving the contradiction between RFI protection and device complexity.
Solution Approach 2:
The system changes operating frequency parameters dynamically to avoid RFI. By monitoring and adjusting the operating frequencies of RFI-generating devices and wireless communication devices, the system achieves RFI avoidance without physical barriers, thereby reducing device complexity and manufacturing costs.
2Object-affected harmful factors
If static RFI avoidance methods are used, then RFI interference is reduced, but performance and productivity are degraded
Solution Approach 1:
The patent employs dynamic frequency adjustment where devices can switch between primary and alternative operating points based on real-time RFI conditions. This dynamic approach maintains optimal wireless communication performance by only applying RFI avoidance when necessary, unlike static methods that continuously degrade performance.
Solution Approach 2:
The system implements self-service RFI avoidance where each device monitors its own operating frequency and automatically adjusts to alternative operating points when RFI is detected. This autonomous operation maintains performance by minimizing human intervention and keeping devices in optimal states without continuous external control.
3Object-affected harmful factors
If RFI mitigation techniques are applied, then RFI impact is minimized, but power consumption increases
Solution Approach 1:
The system performs RFI monitoring and frequency adjustment periodically rather than continuously. Devices check for RFI conditions at specific intervals and only activate mitigation techniques when RFI is actually present, thereby minimizing power consumption while still providing effective RFI protection when needed.
Solution Approach 2:
Each device autonomously monitors its own operating conditions and only activates RFI mitigation when necessary. This self-service approach avoids continuous power-consuming operations by enabling devices to serve themselves with RFI protection only when interference is detected, reducing overall power consumption.
Data Source
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AI summary
Computer readable medium may include instructions which, when executed by a processor, cause the processor to: determine if a radio frequency interference, RFI, generating device will cause radio frequency interference and if the RFI generating device can vacate its operating or interfering frequency which impacts wireless communication functionality or degrades performance; reconfigure the RFI generating device from operating in the operating or interfering frequency, if the RFI generating device is to cause the radio frequency interference; continue the RFI generating device to operate in the operating or interfering frequency, if the RFI generating device will not cause the radio frequency interference.