Multi-Protocol Electronic Device for UWB/Wi-Fi Interference Control
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Solution Overview
Problem
The expansion of Wi-Fi frequency bands to 6 GHz and the introduction of UWB communication for vehicle smart keys in the 6 GHz to 8 GHz band cause interference between Wi-Fi and UWB signals due to differing power levels, with high-power Wi-Fi signals significantly impacting low-power UWB communications.
Innovation Solution
An electronic device with both UWB and Wi-Fi communication circuits, where the Wi-Fi circuit acquires operation time and channel information from the UWB circuit, generates signals to stop Wi-Fi transmission and reception in overlapping channels, and transmits UWB signals during these times, reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Wi-Fi communication is used in the 6 GHz band, then high-rate wireless communication service is provided, but UWB communication quality deteriorates due to interference from high-power Wi-Fi signals
Solution Approach 1:
The patent applies preliminary anti-action by having the Wi-Fi communication circuit proactively request the UWB communication circuit to stop transmitting before Wi-Fi transmission begins. This advance coordination prevents the harmful interference that would otherwise occur when high-power Wi-Fi signals overlap with low-power UWB signals in the 6 GHz band
Solution Approach 2:
The processor acts as an intermediary between the Wi-Fi communication circuit and the UWB communication circuit. It receives operation time information from the UWB circuit, determines appropriate stop transmission requests, and coordinates the timing between the two communication systems to prevent interference while maintaining both services
2Adaptability or versatility
If UWB communication operates in the 6 GHz to 8 GHz band, then precise distance measurement and smart key functions are provided, but communication reliability decreases due to interference from external high-power Wi-Fi signals
Solution Approach 1:
The patent extends preliminary anti-action to external devices by transmitting stop transmission requests through Wi-Fi communication to other electronic devices in the vicinity. This causes external Wi-Fi signals to be suppressed during UWB operation, preventing interference from sources outside the own device
Solution Approach 2:
The system uses feedback by monitoring UWB operation status and adjusting Wi-Fi transmission timing accordingly. The Wi-Fi circuit acquires operation time information from the UWB circuit and uses this feedback to coordinate its transmission schedule, creating a closed-loop interference avoidance mechanism
Data Source
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AI summary
An electronic device according to one embodiment further comprises a first communication circuit for supporting an ultra wide-band (UWB) communication scheme; a second communication circuit for supporting a Wi-Fi communication scheme; and a processor operably connected to the first communication circuit and the second communication circuit, wherein: the second communication circuit generates, when operation time information and channel information about the first communication circuit are acquired from the processor and/or the first communication circuit, a signal for stopping Wi-Fi communication of the second communication circuit on the basis of the operation time information about the first communication circuit, transmits, to at least one external device, a signal for stopping Wi-Fi communication through at least one channel of the second communication circuit that overlaps on a channel of the first communication circuit on the basis of the channel information, and stops the transmission/reception of a Wi-Fi signal on the basis of the operation time information about the first communication circuit; and the first communication circuit and transmit a UWB signal to a first external device of one external device on the basis of the operation time information about the first communication circuit, while the second communication circuit stops the transmission/reception of the Wi-Fi signal. Other various embodiments are possible.