Adaptive Scanning for Wideband Spectrum Interference Detection
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Solution Overview
Problem
Existing wireless digital networks face challenges in efficiently detecting and identifying interference due to limitations in scanning frequency spectrums, particularly with fixed-width channels and predetermined scanning sequences, which hinder the capture of wideband spectrum data and accurate interference detection.
Innovation Solution
The implementation of adaptive scanning methods and configurations that dynamically modify scanning operations to cover wideband frequency channels of varying widths, combining data from multiple channel scans to form a representative spectrum band, and adjusting dwell times based on interferer strength and Wi-Fi activity levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed-width frequency channels and predetermined scanning sequences are used, then the scanning process is simple and standardized, but the ability to capture wideband spectrum data and detect interference accurately is limited
Solution Approach 1:
The patent implements dynamic scanning methods where the access point adjusts scanning parameters in real-time based on detected conditions. The system transitions from static fixed-width channel scanning to dynamic variable-width channel scanning, modifying channel widths and dwell times adaptively to optimize interference detection accuracy while managing system complexity
Solution Approach 2:
The system changes scanning parameters dynamically by adjusting channel widths (20 MHz, 40 MHz, 80 MHz, 160 MHz) and dwell times based on detected interference levels and Wi-Fi activity. This parameter adaptation allows the system to achieve high measurement precision for interference detection without requiring permanently complex scanning mechanisms
2Reliability
If the entire frequency spectrum is scanned frequently to detect interference, then updated channel information is obtained, but the time required for scanning increases
Solution Approach 1:
The patent implements dynamic scanning where the access point adjusts scanning frequency and depth based on detected conditions. When interference is detected or Wi-Fi activity is high, the system increases scanning frequency on affected channels. When conditions are stable, scanning is reduced, thereby maintaining reliable channel information while minimizing time loss
Solution Approach 2:
The system applies different scanning intensities to different frequency channels based on local conditions. Channels with detected interference or high activity receive more frequent and detailed scanning, while quiet channels are scanned less frequently. This localized quality adjustment ensures reliable information where needed while reducing overall scanning time
3Adaptability or versatility
If variable frequency channel widths are supported, then comprehensive spectrum coverage is achieved, but the complexity of managing different channel widths increases
Solution Approach 1:
The patent implements dynamic channel width selection where the access point automatically adjusts channel widths (20 MHz, 40 MHz, 80 MHz, 160 MHz) based on detected spectrum conditions. The system transitions from static predetermined channel configurations to dynamic adaptive configurations, achieving comprehensive spectrum coverage while managing complexity through automated decision-making algorithms
Solution Approach 2:
The scanning system performs self-configuration by automatically selecting appropriate channel widths and scanning parameters based on detected interference patterns and Wi-Fi activity levels. This self-service capability eliminates the need for manual configuration of variable channel widths, achieving high adaptability without proportionally increasing operational complexity
4Productivity
If fixed-time intervals are used for spectrum analysis, then consistent monitoring is maintained, but insufficient time is available to scan all channels and channel widths
Solution Approach 1:
The patent implements dynamic dwell time adjustment where the system allocates different scanning durations to different channels based on their importance and current state. Critical channels with detected interference receive longer dwell times for complete spectrum analysis, while less critical channels receive shorter dwell times. This dynamic time allocation maintains consistent monitoring intervals while achieving complete spectrum data collection
Solution Approach 2:
The system changes dwell times as a variable parameter based on detected conditions and channel priorities. By making dwell time a dynamic parameter rather than a fixed value, the system achieves both high scanning throughput and complete spectrum analysis, resolving the contradiction between productivity and measurement precision
Data Source
AI summary
Adapting scanning of frequency channels of different or varying widths to collect wideband spectrum data is disclosed. Scanning methods and/or configurations are modified based upon the type and signal strength of the interferers present or expected in the spectrum. The system includes: selecting a portion for scanning, wherein the portion includes contiguous and non-contiguous segments, partitioning the selected portion into a first plurality of channels, where at least two of the plurality of channels have different widths, each of the first plurality of channels including contiguous or non-contiguous segments; during a first scan of the selected portion, scanning the selected portion of the radio frequency spectrum at least by scanning a first channel with a first width and scanning a second channel with a second width that is different than the first width; and based on the first scan, collecting data representing the selected portion of the radio frequency spectrum.