Wireless Node Adaptive Channel Selection for Interference Reduction

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Solution Overview

Problem

Traditional wireless networks face interference issues due to noise from other devices operating on the same channel, leading to degraded reception and reduced communication range, as each node in a network cannot adapt to optimal frequency conditions independently.

Innovation Solution

Each wireless node performs periodic energy/noise scans to determine the channel with the lowest noise and interference, adjusts its receiving channel as necessary, and broadcasts this information to neighbors, ensuring messages are transmitted on the optimal channel for each node, thereby improving data signal transmission reliability and range.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If all wireless nodes communicate on the same channel, then network simplicity is maintained, but noise and interference increase degrading reception quality

Engineering Contradiction:

Improvenetwork configurationVSAvoidreception quality

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Each wireless node is assigned a unique receiving channel based on its location and local interference conditions. Instead of using a single uniform channel for all nodes, the system allows different nodes to operate on different channels locally, optimizing reception quality for each node while maintaining overall network functionality.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The wireless network is segmented into multiple channels, with each node operating on its own designated receiving channel. This segmentation divides the congested single-channel environment into multiple less-congested channels, reducing interference and improving reception reliability for each node.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If a single channel is used for all nodes, then channel management is simplified, but communication range is reduced due to increased noise levels

Engineering Contradiction:

Improvechannel managementVSAvoidcommunication range

Core Design Contradiction:

Ease of operationVSLength of moving object

Solution Approach 1:

Each node's receiving channel is optimized for its specific location and environmental conditions. Nodes in different physical locations or with different interference profiles are assigned different channels, allowing each to achieve optimal communication range for its local context rather than being constrained by a single network-wide channel.

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If nodes use fixed receiving channels, then system stability is maintained, but adaptability to changing interference conditions is reduced

Engineering Contradiction:

Improvechannel assignment stabilityVSAvoidinterference adaptation

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The receiving channel assignment is dynamic rather than static. Nodes periodically scan for interference conditions and can change their receiving channels adaptively in response to changing environmental conditions, while maintaining stable communication through coordinated channel changes and neighbor notifications.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Nodes implement feedback mechanisms by scanning their environment for interference conditions and adjusting their receiving channels accordingly. The system uses feedback from interference measurements to make informed channel selection decisions, and nodes notify their neighbors of channel changes to maintain network coordination.

Inventive Principle:

Principle #23Feedback

4Reliability

If nodes perform frequent channel scanning to find optimal frequencies, then reception quality improves, but energy consumption increases

Engineering Contradiction:

Improvereception qualityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Nodes perform channel scanning periodically rather than continuously, balancing the need to maintain optimal reception quality with energy conservation. This periodic action allows nodes to update their receiving channels when necessary while avoiding the excessive energy consumption of continuous scanning.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP2345297B1Adaptive channel selection by wireless nodes for improved operating range

Publication Date: 2017.01.18 MICROCHIP TECHNOLOGY INC

AI summary

Improved message range in a wireless network is achieved by each node performing an energy/noise scan to determine a receiving channel having the lowest noise and/or interference, e.g., best reception conditions, relative to the other channels available in the wireless network. Each node may thereafter scan available channels periodically to adjust its optimal receiving channel if the noise/interference environment changes on its present receiving channel, e.g., noise/interference on another channel is less then the noise on the present receiving channel. When a receiving channel is changed by a node, the wireless node may broadcast this information to notify its neighbor nodes of the change in its receiving channel.