Dynamic Spatial Reuse Protection in Mesh Networks
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Solution Overview
Problem
In dense wireless network deployments, the increased use of spatial reuse in IEEE 802.11ax protocols leads to higher network throughput but also introduces more collisions and interference, necessitating a method for dynamic spatial reuse protection in mesh networks.
Innovation Solution
A device and method that periodically monitor overlapping basic service set (OBSS) airtime in a mesh network, disabling spatial reuse by updating spatial-reuse parameters when OBSS airtime exceeds a predetermined threshold, and re-enabling it when airtime drops below a second threshold, using a controller device to manage spatial-reuse parameters and BSS colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial reuse is enabled in IEEE 802.11ax protocol, then network throughput increases, but collisions and interference increase
Solution Approach 1:
The patent implements dynamic spatial reuse protection by continuously monitoring OBSS airtime and adjusting spatial reuse parameters in real-time. The system transitions from static spatial reuse configuration to dynamic adaptation based on current network conditions, enabling the network to optimize throughput while minimizing collisions and interference through ongoing assessment and parameter adjustment.
Solution Approach 2:
The patent employs feedback mechanisms by periodically obtaining scan reports from agent devices, evaluating OBSS airtime conditions, and using this information to adjust spatial reuse parameters. This closed-loop control system allows the mesh network to respond to changing conditions, maintaining optimal performance by adjusting spatial reuse based on actual network state rather than fixed configurations.
2Object-affected harmful factors
If spatial reuse parameters are adjusted to reduce interference, then collisions decrease, but network throughput may be reduced
Solution Approach 1:
The system dynamically adjusts spatial reuse parameters based on real-time OBSS airtime conditions rather than using fixed conservative settings. By continuously monitoring and adapting parameters, the system achieves the lowest interference level necessary while maintaining maximum throughput, avoiding both excessive interference and unnecessary throughput reduction.
Solution Approach 2:
The patent changes spatial reuse parameters (such as OBSS_PD threshold, SRG bitmap, and spatial reuse offset) based on evaluated OBSS airtime conditions. These parameter adjustments are made dynamically to balance interference reduction with throughput maintenance, allowing the system to optimize performance for current network conditions rather than using static parameter sets.
Data Source
AI summary
A device is provided. The device includes: at least one antenna and a circuit. The circuit communicates with one or more agent devices through the at least one antenna, wherein the device and the one or more agent devices form a mesh network. The circuit periodically obtains a scan report from each agent device, and determines whether an OBSS (overlapping basic service set) airtime in the scan report of each agent device satisfies a first predetermined condition. In response to the OBSS airtime of each agent device satisfying the first predetermined condition, the circuit disables spatial reuse of each agent device by updating a plurality of spatial-reuse parameters for each agent device.