Master-Dependent Mesh DFS Protocol for Radar Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mesh networks lack an efficient protocol for dynamic frequency selection (DFS) to comply with regulatory requirements and efficiently propagate events and coordinate actions, especially in environments with radar interference, due to the absence of a defined DFS protocol for IEEE 802.11s based mesh basic service set (MBSS) networks.
Innovation Solution
A multi-radio mesh DFS protocol is introduced, which includes a signaling scheme for radar detection, event propagation, channel change coordination, and error recovery, utilizing a master mesh node hierarchy to streamline event propagation and action coordination, ensuring compliance with regulatory requirements by dynamically switching communication channels when radar is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a distributed event propagation protocol is implemented in mesh networks, then event notification efficiency is improved, but protocol complexity and coordination overhead increase
Solution Approach 1:
The mesh network is segmented into master nodes and dependent nodes based on DFS capability. Master nodes handle DFS operations and coordinate channel changes, while dependent nodes focus on receiving notifications and executing actions. This segmentation reduces protocol complexity for dependent nodes while maintaining efficient event propagation across the entire network.
Solution Approach 2:
Master nodes act as intermediaries between the radar detection mechanism and dependent nodes. When radar is detected, master nodes process the DFS protocol, determine appropriate channel changes, and propagate notifications to dependent nodes. This intermediary role simplifies the protocol implementation for dependent nodes while maintaining centralized coordination for efficient network-wide event propagation.
2Reliability
If dynamic frequency selection is implemented to comply with radar regulations, then regulatory compliance is improved, but network coordination overhead and response time increase
Solution Approach 1:
The network pre-designates master nodes with DFS capabilities before radar detection occurs. These master nodes are prepared to immediately coordinate channel changes when radar is detected, eliminating the need for ad-hoc selection and coordination during the actual channel change event. This preliminary arrangement reduces coordination overhead and accelerates the response time when regulatory compliance is required.
3Productivity
If centralized coordination through master nodes is implemented, then action coordination efficiency is improved, but single point of failure risk increases
Solution Approach 1:
The network is segmented into multiple master nodes, each responsible for coordinating actions within its own subset of dependent nodes. This segmentation distributes the coordination function across multiple nodes rather than relying on a single centralized coordinator, thereby maintaining coordination efficiency while reducing the impact of any single node failure on the overall network.
Solution Approach 2:
The system dynamically changes the operational parameters of master nodes based on network conditions and node capabilities. When a master node fails, the network can reconfigure by promoting alternative nodes to master status, changing the coordination topology to maintain efficiency while adapting to the reduced network capacity and ensuring continued robustness.
Data Source
AI summary
Technology for event propagation and action coordination in a mesh network is described. In one embodiment, a master mesh node for a first communication channel in a mesh network receives a first event notification message from a first dependent mesh node associated with the master mesh node. The first event notification message pertains to a first event detected by the first dependent mesh node. In response, the master mesh node generates a first action message specifying a first action associated with the first event and sends the first action message to the first dependent mesh node and to a second dependent mesh node associated with the master mesh node. The master mesh node, the first dependent mesh node, and the second dependent mesh node all exchange communications with each other using the first communication channel in the mesh network.