Adaptive Wireless LAN Control for Radio Frequency Interference

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Solution Overview

Problem

Radio frequency interference (RFI) causes data delays and buffer issues in wireless LAN systems, particularly during stream data transmission, due to overlapping frequency bands between wireless LAN and non-LAN devices, which existing methods fail to adequately address.

Innovation Solution

A communication method that selectively switches between centralized and distributed control methods based on RFI detection, using a detection unit to identify interference and a switching unit to adapt the communication mode, allowing for adaptive data transmission and increased buffer capacity to prevent delays and overflows.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a centralized control method is used to secure bandwidth for stream data transmission, then data communication rate is improved, but data delay occurs when radio frequency interference happens

Engineering Contradiction:

Improvedata communication rateVSAvoiddata delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system dynamically switches between centralized control method and distributed control method based on detection of radio frequency interference. When RFI is detected, the system transitions from centralized to distributed control to avoid data delays, and when no RFI is present, it uses centralized control to maintain high data communication rates.

Inventive Principle:

Principle #15Dynamics

2Reliability

If centralized control method is used under radio frequency interference, then buffer overrun occurs in sending apparatus and buffer underrun occurs in receiving apparatus

Engineering Contradiction:

Improvebuffer control stabilityVSAvoidbuffer overrun and underrun

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system employs a detection unit that continuously monitors for radio frequency interference and provides feedback to the switching unit. Based on this feedback, the system switches between centralized and distributed control methods to prevent buffer overrun in sending apparatus and buffer underrun in receiving apparatus caused by RFI.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If distributed control method is used, then adaptability to radio frequency interference is improved, but data communication rate decreases

Engineering Contradiction:

Improveadaptability to RFIVSAvoiddata communication rate

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system changes the control method parameter dynamically based on RFI conditions. When RFI is detected, it switches to distributed control method which has better adaptability to interference. When no RFI is present, it switches to centralized control method which provides higher data communication rates.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8488570B2Communication method, communication apparatus, and computer program

Publication Date: 2013.07.16 CANON KK

AI summary

A method and apparatus for communicating between devices by selectively using a plurality of communication methods including a centralized control method, in which each communication apparatus sends and receives data under control of a control apparatus, and a distributed control method, in which each communication apparatus sends and receives data in an autonomous and distributing manner. The method and apparatus include detecting radio frequency interference, and switching between the centralized control method and the distributed control method according to a result of detecting the radio frequency interference.