Interference-Based Wireless Channel Switching

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Solution Overview

Problem

Modern Information Handling Systems (IHSs) do not account for electromagnetic interference when switching between communication channels, leading to degraded user experiences due to factors like packet error rates and throughput issues on channels like 2.4 GHz.

Innovation Solution

Implementing interference-based switching systems that detect wireless interference using Bluetooth interfaces and scoring mechanisms, incorporating Received Signal Strength Indicator (RSSI) and Time-of-Flight (ToF) data, along with context information to adaptively select the best communication channel, such as switching from a 5 GHz to a 2.4 GHz channel based on interference levels and user context.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If an IHS switches to a 2.4 GHz channel from a 5 GHz channel, then coverage range and penetration capability are improved, but electromagnetic interference and packet error rates increase

Engineering Contradiction:

Improvecoverage rangeVSAvoidelectromagnetic interference

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary interference detection and channel scoring before switching channels. The processor detects wireless interference in the second communication channel before the IHS switches from the first channel, allowing the system to anticipate and avoid harmful interference conditions proactively

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors interference levels and uses this feedback to dynamically adjust channel selection. The processor detects interference levels and uses this information to score channels, creating a closed-loop system that adapts to changing electromagnetic conditions in real-time

Inventive Principle:

Principle #23Feedback

2Productivity

If an IHS performs channel scanning and switching operations, then network connectivity and throughput are improved, but device complexity and processing overhead increase

Engineering Contradiction:

Improvenetwork throughputVSAvoidswitching decision complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system autonomously performs channel scanning, interference detection, and switching decisions without requiring external intervention. The processor automatically detects interference, scores channels based on multiple factors including RSSI and ToF data, and executes switching decisions independently, reducing the need for complex external control mechanisms

Inventive Principle:

Principle #25Self-service

3Measurement precision

If an IHS uses interference detection and scoring mechanisms, then channel selection accuracy is improved, but measurement and detection difficulty increase

Engineering Contradiction:

Improvechannel selection accuracyVSAvoidinterference detection complexity

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The system uses a unified scoring mechanism that integrates multiple measurement factors (RSSI, ToF, interference levels) into a single channel score. This multi-functional approach allows the processor to evaluate channels comprehensively using one standardized metric, simplifying the decision-making process despite the complexity of individual measurements

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach improves user experience by selecting less interfered channels, reducing packet errors and increasing throughput, and making more intelligent network switching decisions by considering electromagnetic interference and context factors.

Implementation Method 1

detect wireless interference in a second communication channel provided by a second access point... To detect the wireless interference, the program instructions, upon execution, may cause the IHS to use a Bluetooth interface

Methodology Applied

Scientific EffectElectromagnetic radiation detection: Electromagnetic Induction

Implementation Method 2

score the second access point, at least in part, based upon the wireless interference... To score the second access point based upon the wireless interference, the program instructions, upon execution, may cause the IHS to use at least one of: Received Signal Strength Indicator (RSSI) data

Methodology Applied

Scientific EffectSignal strength measurement:

Implementation Method 3

Methodology Applied

Scientific EffectTime-of-Flight measurement: Time of Flight

Data Source

PatentUS11166289B2Interference-based switching

Publication Date: 2021.11.02 DELL PROD LP

AI summary

Systems and methods for interference-based switching are described. In some embodiments, an Information Handling System (IHS) may include a processor and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution, cause the IHS to: while connected to a first communication channel provided by a first access point, detect wireless interference in a second communication channel provided by a second access point; score the second access point, at least in part, based upon the wireless interference; and switch from the first communication channel to the second communication channel, at least in part, based upon the score.