UWB and Wi-Fi Synchronization Scheduling for Interference Control
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Solution Overview
Problem
The coexistence of UWB and Wi-Fi technologies is challenged by frequency overlap, bandwidth differences, and power disparities, leading to severe interference that deteriorates the performance of both systems.
Innovation Solution
Implementing techniques such as dynamic radio resource management, zone of non-interference, beamforming, and adjusting UWB packet structures to mitigate interference, including modifying Wi-Fi transmission timings and channels to avoid UWB frequencies, and enhancing UWB signal detection through longer synchronization headers and dynamic CIR threshold adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If UWB channel 5 is used for transmission, then range improvement is achieved, but interference with Wi-Fi 6E increases
Solution Approach 1:
The system performs preliminary actions by having the UWB anchor transmit a synchronization signal before actual data transmission. This allows the Wi-Fi system to detect the upcoming UWB transmission and adjust its own transmissions accordingly, preventing interference before it occurs. The synchronization signal acts as a warning that triggers the Wi-Fi system to back off or shift channels.
Solution Approach 2:
The system implements feedback mechanisms where the UWB anchor transmits synchronization signals that provide timing information to both UWB and Wi-Fi systems. This feedback loop allows the Wi-Fi system to adjust its transmission schedule based on detected UWB synchronization signals, creating a coordinated operation that prevents interference while maintaining UWB range advantages.
2Adaptability or versatility
If UWB and Wi-Fi operate in the same frequency band, then spectrum utilization is improved, but interference between systems increases
Solution Approach 1:
The system segments the time domain by introducing synchronization signals that create distinct time slots for UWB and Wi-Fi transmissions. By dividing the transmission timeline into synchronization phases and data transmission phases, the system allows both technologies to share the frequency band without mutual interference, achieving spectrum utilization efficiency while preventing harmful interactions.
Solution Approach 2:
The synchronization signal acts as an intermediary between UWB and Wi-Fi systems. This intermediary element carries timing and coordination information that mediates the interaction between the two systems, allowing them to coexist in the same frequency band by establishing a shared understanding of transmission schedules and avoiding simultaneous operations.
3Length of stationary object
If Wi-Fi transmits at high power levels, then transmission distance is improved, but UWB signal detection accuracy deteriorates
Solution Approach 1:
The system performs preliminary synchronization signal transmission before high-power Wi-Fi data transmission occurs. This preliminary action allows UWB receivers to detect the synchronization signal and adjust their detection parameters in advance, preparing them to accurately detect subsequent UWB signals even when high-power Wi-Fi transmissions are present in the background.
Solution Approach 2:
The synchronization signal provides feedback information about the transmission environment and timing conditions to both UWB and Wi-Fi systems. This feedback mechanism allows the system to dynamically adjust detection sensitivity and power levels, ensuring that UWB signal detection accuracy is maintained even when Wi-Fi transmits at high power levels for extended distances.
Data Source
AI summary
Techniques for optimizing the coexistence of UWB and Wi-Fi transmissions are provided. A synchronization schedule is received from an Ultra-wideband (UWB) network device. The synchronization schedule is analyzed to determine one or more timings for one or more UWB transmissions. A schedule for one or more Wireless Local Area Network (WLAN) transmissions is adjusted to avoid interference with the one or more UWB transmissions. The adjusted schedule for the one or more WLAN transmissions is communicated to a WLAN device.