Standalone DFS Master for Dynamic Spectrum Access in P2P Networks
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Solution Overview
Problem
Current Wi-Fi peer-to-peer networks lack dynamic frequency selection (DFS) spectrum access due to the absence of an access point, leading to inefficiencies such as prolonged channel availability checks and loss of DFS channel usage upon radar detection or false-detection, which is detrimental for applications requiring rapid file transfers and video streaming.
Innovation Solution
A standalone DFS master device coupled with a client device and a cloud intelligence engine that scans and generates spectral information across multiple communication channels, enabling DFS channel availability checks and in-service monitoring without the need for an access point, and quickly switching to alternative channels in case of radar detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional peer-to-peer networks operate without an access point, then device autonomy and network flexibility are improved, but DFS spectrum access capability is lost and channel availability check times are prolonged
Solution Approach 1:
The system performs preliminary radar detection and channel availability checks before peer-to-peer communication begins. The access point pre-scans DFS channels and stores availability information, allowing client devices to quickly establish connections without performing time-consuming channel checks themselves.
Solution Approach 2:
An access point is introduced as an intermediary device that performs DFS master functions for peer-to-peer networks. The access point monitors radar signals and manages DFS channel selection, enabling client devices to communicate peer-to-peer while maintaining DFS compliance through the intermediary's channel management.
2Productivity
If DFS channels are used in peer-to-peer networks with access point, then spectrum access efficiency is improved, but loss of DFS channels occurs upon radar detection or false-detection
Solution Approach 1:
The system dynamically switches between multiple DFS channels based on real-time radar detection. When radar is detected on the current channel, the access point automatically transitions to an alternative DFS channel, maintaining continuous spectrum access efficiency without permanent loss of DFS channel capability.
Solution Approach 2:
The system maintains a pre-identified list of alternative DFS channels that are known to be free from radar interference. When radar detection occurs on the active channel, the system can immediately switch to a cushioned alternative channel from the pre-prepared list, preventing complete loss of DFS channel availability.
3Measurement precision
If standalone DFS master scans multiple DFS channels for radar detection, then channel availability information accuracy is improved, but scanning time and computational load increase
Solution Approach 1:
The DFS master scans multiple DFS channels in parallel segments rather than sequentially checking each channel completely. The scanning process is divided into time segments where the system quickly checks multiple channels and identifies those with radar interference, reducing total scanning time while maintaining accurate channel availability information.
Data Source
AI summary
The present invention relates to wireless networks and more specifically to a method and apparatus for providing dynamic frequency selection (DFS) spectrum access in peer-to-peer wireless networks. Embodiments of the present invention include a standalone DFS master coupled to a client device and configured to collect and/or generate spectral information associated with a plurality of 5 GHz DFS communication channels and a cloud intelligence engine that is also coupled to the client device and configured to receive the spectral information via the client device. The cloud intelligence engine is configured to determine a list of one or more communication channels for the standalone multi-channel DFS master from the plurality of 5 GHz DFS communication channels.