Distributed Ledger Wireless Channel Assignment

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Solution Overview

Problem

Increasing AP density leads to bandwidth interference due to overlapping channels and selfish channel selection, causing network instability in distributed wireless networks.

Innovation Solution

A digital currency-driven channel assignment mechanism using a distributed ledger, where access points (APs) are incentivized to select channels that optimize their own bandwidth while maintaining network stability through a Nash equilibrium, punishing rogue APs that cause interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If AP density is increased to provide better wireless coverage, then network coverage is improved, but bandwidth interference increases due to channel overlap

Engineering Contradiction:

Improvenetwork coverage areaVSAvoidbandwidth interference

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The system dynamically changes channel assignment parameters based on AP density and spatial relationships. Each AP is assigned a specific channel from the available set {1, 6, 11} based on its location and neighboring APs, transforming the static channel allocation into a dynamic parameter optimization problem that reduces interference while maintaining coverage

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies different channel assignments to different APs based on their local spatial characteristics and neighboring AP configurations. Each AP receives a customized channel assignment tailored to its specific location and interference environment, rather than using a uniform assignment strategy across the entire network

Inventive Principle:

Principle #3Local quality

2Productivity

If APs are allowed to selfishly select channels to maximize their own bandwidth, then individual AP bandwidth is improved, but network stability deteriorates due to channel overlap and interference

Engineering Contradiction:

Improveindividual AP bandwidthVSAvoidnetwork stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The system implements a feedback mechanism where each AP's channel selection is constrained by the channel assignments of neighboring APs. The utility function incorporates interference from neighboring APs, creating a feedback loop that guides each AP toward selecting channels that are optimal for itself while considering the overall network state, ultimately converging to a Nash equilibrium that maintains network stability

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces a channel assignment mechanism that acts as an intermediary between individual AP bandwidth optimization and network stability. This mechanism coordinates channel selections across the network by considering spatial relationships and interference patterns, mediating between selfish AP behavior and overall network performance through a distributed game-theoretic approach

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10548022B1Distributed ledger for wireless channel assignment

Publication Date: 2020.01.28 CA TECH INC

AI summary

A digital currency driven channel assignment technique is disclosed. Each AP in a distributed network uses a channel selection manager and a distributed ledger to select channels according to a channel assignment and a digital currency associated with the distributed ledger. The digital currency incentivizes APs to make sacrifices in their channel selection for the benefit of the overall network while punishing APs that select channels selfishly and cause bandwidth interference.