Multi-Node DFS Coordination for Radar-Free Channel Switching
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Solution Overview
Problem
DFS-aware operation in multi-node wireless networks is complex due to spatial distribution of nodes leading to differing radar detection views, resulting in network connectivity loss and potential interference with radar operations.
Innovation Solution
Nodes in multi-node wireless networks dynamically switch between master and slave modes, employing control messaging to inform each other about radar detection and channel changes, ensuring all nodes operate in radar-free channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nodes operate independently in DFS channels, then radar detection capability is improved, but network connectivity is lost due to spatial distribution
Solution Approach 1:
The patent merges the DFS decision-making of multiple spatially distributed nodes into a unified network-wide decision by designating one node as master. The master node consolidates radar detection information from all nodes and makes a single DFS decision that applies to the entire network, thereby maintaining connectivity while preserving radar detection capability.
Solution Approach 2:
The master node acts as an intermediary between the spatially distributed slave nodes and the DFS channel management. Slave nodes report their radar detection status to the master, which then coordinates the channel switching decision for the entire network, preventing connectivity loss that would occur if nodes switched channels independently.
2Stability of the object's composition
If all nodes switch to slave mode, then network coordination is improved, but radar detection coverage is reduced
Solution Approach 1:
The patent segments the DFS functionality into two distinct roles: master nodes that make coordination decisions and slave nodes that execute decisions and report local conditions. This segmentation allows the network to maintain coordination through the master while preserving radar detection coverage through slave nodes that continue monitoring their local environments.
Solution Approach 2:
Slave nodes maintain multi-functionality by simultaneously performing their primary wireless communication function and radar detection reporting function. They don't lose radar detection capability but rather channel it through the master node, which then incorporates this information into network-wide DFS decisions.
3Speed
If nodes make independent DFS decisions, then response time to radar is improved, but channel consistency deteriorates
Solution Approach 1:
The patent establishes preliminary action by having slave nodes continuously monitor and report radar conditions to the master node before independent channel switching is needed. This pre-coordinated information gathering allows the master to make rapid, informed decisions that maintain channel consistency across the network while responding quickly to detected radars.
Data Source
AI summary
A wireless device, for operation within a wireless network, the wireless device comprising: a RF transmitter, a RF receiver, and processing circuitry, where the RF transmitter sends a radar-detected message or a channel-switch announcement message to other wireless devices in the wireless networks. The other wireless devices receive the radar-detected message and abandon radar-detected channels designated in the radar-detected message. The other wireless devices also receive the channel-switch announcement message and switch to radar-free channels designated in the channel-switching message.