NBA-UWB Channel Selection for Wi-Fi and BLE Interference
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Solution Overview
Problem
In dense Wi-Fi networks, narrowband-assisted Ultra-Wideband (UWB) signaling is prone to interference from Wi-Fi and Bluetooth Low Energy (BLE) technologies, limiting the effective range and accuracy of UWB-based location tracking.
Innovation Solution
A network device selects a target channel for UWB ranging based on channel status messages from neighboring devices, minimizing interference by choosing a channel with the lowest Received Signal Strength Indicator (RSSI) or least traffic load, and utilizing narrowband signaling to synchronize and execute UWB ranging rounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If narrowband-assisted UWB signaling is used to increase UWB range, then UWB ranging accuracy is improved, but interference with Wi-Fi and BLE technologies increases
Solution Approach 1:
The system dynamically selects operating channels based on real-time channel status messages and RSSI measurements from neighboring devices. The channel selection logic continuously monitors the electromagnetic spectrum and adapts its choice of narrowband channel to avoid interference with Wi-Fi and BLE, thereby maintaining UWB ranging accuracy while minimizing harmful interactions with other wireless technologies.
Solution Approach 2:
The system implements a feedback mechanism where channel status messages from neighboring devices are received and processed to determine optimal channels for UWB signaling. The channel selection logic uses RSSI values and channel utilization information as feedback to make informed decisions about which channels to use, ensuring that UWB operations proceed with minimal interference to and from other wireless systems.
2Power
If additional narrow band channel is used for UWB signaling, then transmit power and power spectral density are increased, but interference with co-existing technologies increases
Solution Approach 1:
The system changes the operating parameters by selecting different narrowband channels based on real-time channel conditions. Instead of using a fixed channel, the system dynamically adjusts which narrowband channel is used for UWB signaling, choosing channels with lower RSSI and less traffic load to minimize interference while maintaining adequate transmit power for accurate ranging.
Solution Approach 2:
The channel selection process is dynamic and adaptive, allowing the system to respond to changing electromagnetic environment. The channel status messages and RSSI measurements provide real-time information that triggers dynamic channel switching, ensuring that UWB transmit power is optimized while avoiding interference with Wi-Fi, BLE, and other co-existing technologies.
3Object-affected harmful factors
If channel selection based on lowest RSSI is implemented, then interference is minimized, but channel selection complexity increases
Solution Approach 1:
The channel selection logic operates autonomously by processing channel status messages and RSSI measurements that are naturally available from neighboring devices during normal Wi-Fi operations. The system uses existing broadcasted information to make channel selection decisions without requiring complex external monitoring or manual configuration, thereby minimizing interference while keeping the implementation relatively simple.
Solution Approach 2:
The channel selection mechanism leverages the universal presence of channel status messages and RSSI broadcasts in Wi-Fi networks. Instead of requiring dedicated sensing infrastructure or complex measurement systems, the system utilizes the existing multi-functional information already exchanged between access points for network management, thereby simplifying the channel selection process while achieving interference minimization.
Data Source
AI summary
Devices, systems, methods, and processes for channel selection in wireless networks for narrowband-assisted ultra-wideband (NBA-UWB) signaling and ranging. Narrowband signal overlaps the existing ISM bands and thus has high likelihood of interfering with Wi-Fi, Bluetooth Low Energy (BLE), and other technologies used inside a network device. Therefore, selection of an appropriate target channel that may be used for UWB signaling can mitigate interference with Wi-Fi/BLE signals. A network device may receive one or more channel status messages from a plurality of neighboring network devices. The channel status messages may indicate a channel associated with a respective neighboring network device and a channel metric associated with the channel. The channel metric may indicate channel quality, traffic status, signal strength, etc. Based on a set of available channels indicated by the one or more channel status messages, the network device may select a target channel to execute a UWB signaling.