Cloud DFS Super Master for Wi-Fi Radar Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Wi-Fi and LTE-U networks face congestion and unreliable connections due to inefficient management of unlicensed spectrum, particularly in the DFS bands, leading to issues like hidden nodes, false radar detections, and underutilization of bandwidth, with no effective coordination between devices.
Innovation Solution
A cloud DFS super master system that employs multi-channel radar detection and in-service monitoring, using sensors to detect radar signals and wireless traffic information, and a cloud-based intelligence engine to manage channel selection across multiple devices, ensuring efficient use of DFS channels and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single access point performs DFS master services on one channel, then radar detection capability is provided, but spectrum utilization is underutilized and bandwidth is limited
Solution Approach 1:
The patent segments the DFS master functionality across multiple access points, where each AP is responsible for specific channels. Instead of one AP handling all DFS channels, the system divides channel monitoring responsibilities among multiple APs, allowing parallel radar detection on multiple channels simultaneously, thus improving spectrum utilization without overwhelming a single device
Solution Approach 2:
The patent merges the DFS master capabilities of multiple access points into a coordinated system. Multiple APs with radar detection capabilities work together as a distributed DFS master network, sharing channel availability information and coordinating their operations to provide comprehensive spectrum management across the wireless network
2Reliability
If access points perform independent DFS channel scanning, then radar detection is achieved, but hidden nodes and false detections occur due to lack of coordination
Solution Approach 1:
The patent implements a feedback mechanism where access points exchange radar detection results and channel availability status with each other. When one AP detects radar on a channel, it notifies other APs, which then adjust their channel selection accordingly. This coordinated feedback system reduces false detections by cross-validating observations and prevents hidden node problems through shared awareness of channel conditions
Solution Approach 2:
The system introduces a coordination mechanism that acts as an intermediary between distributed access points. This intermediary facilitates information exchange about radar detections and channel status, enabling APs to make informed decisions about channel selection based on collective network knowledge rather than isolated local observations
3Productivity
If DFS channels are used without coordination, then bandwidth availability increases, but interference between proximate LTE-U and Wi-Fi devices occurs
Solution Approach 1:
The patent performs preliminary channel availability checks and radar detection before allowing devices to transmit on DFS channels. By proactively identifying available channels and detecting radar presence in advance, the system prevents interference conflicts before they occur, ensuring that LTE-U and Wi-Fi devices operate on coordinated, interference-free channels
Solution Approach 2:
The system dynamically adjusts channel allocation and coordination based on real-time radar detection results and network conditions. Access points continuously monitor channel availability and adapt their transmission parameters, enabling the network to respond to changing spectrum conditions and maintain optimal performance while avoiding interference between devices
Data Source
AI summary
The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of radio frequency channels. One embodiment includes a cloud DFS super master, a plurality of radar detectors, and one or more client devices. The cloud DFS super master is programmed to receive the results of a scan for a radar signal from each of the plurality of radar detectors, geo-location information for the plurality of radar detectors, geo-location information for the client devices and a request for available radio channels from the client devices. The cloud DFS super master is programmed to determine one or more radio channels that are free of radar signals within a distance of the client device.