Gateway Mesh Node Channel Allocation via Interference Scanning
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Solution Overview
Problem
Current channel allocation methods in multi-radio wireless mesh networks face challenges in minimizing interference and optimizing performance due to the complexity of dynamic routing and large numbers of nodes, especially in unlicensed spectrum with omnidirectional coverage, where traditional radio planning becomes economically and technically unfeasible.
Innovation Solution
The method involves a gateway mesh node receiving a channel set list, scanning channels to assess interference, and allocating channels to radios while initiating beacon frames with path cost information to enable independent decision-making by nodes for channel selection, minimizing interference and optimizing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional manual or semiautomatic radio planning is used for channel allocation, then channel assignment can be performed, but it becomes economically and technically unfeasible when the number of nodes is large and the network is deployed in unlicensed spectrum with omnidirectional coverage
Solution Approach 1:
Each mesh node autonomously performs channel allocation by scanning channels, assessing interference levels, and selecting optimal channels for its radios without requiring external planning assistance. The node independently evaluates channel conditions and makes allocation decisions based on local measurements, eliminating the need for manual or semiautomatic radio planning tools.
Solution Approach 2:
The system dynamically changes channel parameters based on real-time interference assessment. Instead of using fixed pre-assigned channels, nodes scan and evaluate channel interference levels, then adaptively select channels with lower interference. This dynamic parameter adjustment allows the network to automatically optimize channel allocation in response to changing environmental conditions.
2Ease of manufacture
If multiple radios are packaged into one meshed node to reduce cost, then economic feasibility improves, but channel allocation complexity increases due to intra-node and inter-node interference
Solution Approach 1:
Each radio within a multi-radio node is assigned a specific channel based on local interference conditions assessed during channel scanning. The node evaluates interference levels for each channel and allocates channels to individual radios according to their specific operational contexts, ensuring that each radio operates on a channel with minimal interference while considering both intra-node and inter-node interference patterns.
3Adaptability or versatility
If dynamic channel allocation is implemented without central coordination, then network autonomy and scalability improve, but ensuring optimal channel selection across all nodes becomes more difficult
Solution Approach 1:
Each mesh node performs channel scanning and interference assessment, using the collected feedback information to make informed channel allocation decisions. The node continuously monitors channel conditions and adjusts its channel selection based on the assessed interference levels, ensuring optimal channel assignment while maintaining autonomous operation without central coordination.
Data Source
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AI summary
A method includes receiving at a gateway mesh node a channel set list indicating radio channels that are allowed for use by the gateway mesh node, scanning channels in the channel set list and creating a list of channels in order of interference that is present, allocating channels from the list of channels to a plurality of radios that comprise the gateway mesh node, and initiating transmission of beacon frames from each of the plurality of radios on a main channel. Each beacon frame includes information descriptive of a path cost representing a sum of all link costs back to a central point, a primary radio channel used by the radio transmitting the beacon frame, a channel set indicating only those channels that an associated portion of the mesh network is allowed to use, and a set of meshed nodes associated with the radio.