Mirrored Split Passive Scanning with Dynamic Dwell Timing
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Solution Overview
Problem
Existing passive scanning techniques in wireless communication systems fail to meet the latency, throughput, and timing requirements of low-latency applications such as real-time gaming and augmented/virtual reality due to inability to dynamically configure scanning parameters.
Innovation Solution
Configuring off-channel scan time and home channel dwell time for passive scanning operations to be within specified limits, allowing alternating or concurrent scanning of additional wireless channels to meet latency, throughput, and timing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional passive scanning is used, then channel surveying is performed, but latency requirements of low-latency applications are violated
Solution Approach 1:
The scanning operation is divided into multiple segments: home channel dwelling period and off-channel scanning period. The off-channel scanning is further segmented into sequential scanning of multiple channels. This segmentation allows the device to spend less time on each segment while completing the overall survey, reducing total scanning time and meeting latency requirements.
Solution Approach 2:
The patent dynamically adjusts scanning parameters including off-channel scan time, home channel dwell time, and scanning period based on application requirements. The device can modify these parameters in real-time to balance between scanning completeness and latency constraints, enabling adaptive scanning that meets varying latency requirements.
2Adaptability or versatility
If scanning parameters are fixed, then implementation is simple, but adaptability to different applications is insufficient
Solution Approach 1:
The patent implements dynamic parameter changes by allowing the device to adjust off-channel scan time, home channel dwell time, and scanning period based on application requirements. The system can change these parameters without requiring complex reconfiguration, providing adaptability while maintaining reasonable implementation complexity through standardized parameter modification mechanisms.
3Productivity
If off-channel scan time is increased, then more channels can be scanned, but latency requirements cannot be met
Solution Approach 1:
The patent performs preliminary actions by conducting scans on multiple off-channels during the off-channel scanning period before the home channel dwelling. This allows the device to gather information about multiple channels in advance, improving productivity without requiring excessive scan time, as the preliminary scans are completed within the constrained off-channel scan time window.
Solution Approach 2:
The scanning operation uses periodic action through the repeated cycle of off-channel scanning followed by home channel dwelling. The device periodically switches between scanning mode and dwelling mode, allowing efficient use of available time. This periodic structure enables multiple scanning cycles within the total scanning period, improving overall productivity while keeping each individual off-channel scan duration manageable.
Data Source
AI summary
This disclosure provides methods, devices, and systems for performing passive scanning operations on one or more wireless channels. In some implementations, a wireless communication device configures an off-channel scan time and a passive scanning period for passive scanning operations based on latency requirements of a low-latency application, and selects a home channel dwell time for the passive scanning operations. The wireless communication device may perform the passive scanning operation by alternating between listening for beacon frames on one or more second wireless channels for the configured off-channel scan time and dwelling on a home channel for the selected home channel dwell time during a first portion of the configured scanning period. The wireless communication device also may listen for beacon frames on the one or more second wireless channels during a second portion of the configured scanning period that is defined by the selected home channel dwell time.