DFS Channel Allocation for Mixed-Capability Wi-Fi Access Points
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Solution Overview
Problem
Wireless networks face interference from DFS channels due to radar systems and inefficient allocation of non-DFS channels leads to poor performance for DFS non-capable clients and reduced network capacity.
Innovation Solution
A method and system for prioritizing non-DFS channel allocation to wireless access points serving DFS non-capable clients, based on metadata analysis of client capabilities and network conditions, to minimize interference and optimize network capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DFS channels are used to increase network capacity, then network capacity is improved, but interference from radar systems occurs
Solution Approach 1:
The patent segments the wireless network into two distinct groups: DFS-capable access points that can utilize DFS channels for high capacity, and DFS non-capable access points that are assigned non-DFS channels to avoid radar interference. This segmentation allows the network to simultaneously achieve high capacity where possible while protecting vulnerable clients from interference.
Solution Approach 2:
The patent applies local quality by assigning different channel allocation strategies to different parts of the network based on client capabilities. DFS-capable access points receive priority allocation of DFS channels for maximum capacity, while DFS non-capable access points are assigned non-DFS channels for interference-free operation, creating locally optimized quality for each segment.
2Object-affected harmful factors
If non-DFS channels are prioritized for DFS non-capable clients, then interference is avoided, but network capacity is reduced
Solution Approach 1:
The patent implements dynamic channel allocation where the system continuously monitors client capabilities and network conditions, then adjusts channel assignments in real-time. DFS non-capable clients are dynamically assigned non-DFS channels to avoid interference, while DFS-capable clients can dynamically access DFS channels for high-capacity operations, allowing the network to adapt its capacity utilization based on current client composition.
Solution Approach 2:
The patent changes the channel allocation parameter based on client DFS capability. When DFS non-capable clients are detected, the system changes their assigned channel parameter from DFS to non-DFS channels, while maintaining DFS channel assignments for capable clients, thereby optimizing the network capacity parameter according to the mixed client environment.
3Object-affected harmful factors
If DFS channels are used to avoid interference with other WiFi devices, then WiFi interference is reduced, but DFS non-capable clients experience poor performance
Solution Approach 1:
The patent introduces an intermediary classification mechanism that identifies DFS capability status and acts as a mediator between DFS channel usage and client performance requirements. DFS-capable clients can directly access DFS channels with reduced WiFi interference, while DFS non-capable clients are mediated to non-DFS channels, ensuring reliable performance for both groups without direct conflict.
Solution Approach 2:
The patent segments the client population by DFS capability and creates separate channel allocation zones: DFS-capable clients are served on DFS channels to minimize WiFi interference from other devices, while DFS non-capable clients are served on non-DFS channels to ensure reliable performance, thus resolving the contradiction through spatial and frequency domain segmentation.
Data Source
AI summary
A channel allocation specification is created that allocates dynamic frequency selection (DFS) channels and non-DFS channels to a plurality of wireless access points. The channel allocation specification is sent to an access point controller that is configured to assign the DFS channels and the non-DFS channels to the wireless access points. Creating the channel allocation specification includes: identifying a first group that includes the wireless access points that provide network access to at least one of a plurality of DFS non-capable clients; prioritizing allocation of the non-DFS channels to the first group of wireless access points; and prioritizing allocation of the non-DFS channels within the first group of wireless access points based on a plurality of prioritization values corresponding to the wireless access points.