Wireless Noise Detection in Inter-Frame Spaces
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Solution Overview
Problem
Wireless communication protocols like IEEE 802.11b, 802.11g, and 802.11a face performance degradation due to wireless noise, which is often handled by reducing data transmission rates or resending packets, leading to reduced throughput and network slowdowns.
Innovation Solution
A method to detect wireless noise during inter-frame spaces when no data is transmitted, allowing counteractive measures such as lowering the clock frequency of nearby LCDs to shift harmonics out of the communication frequency range or generating an opposite-in-phase noise to cancel out detected noise from wireless signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless noise is handled by reducing data transmission rates or resending packets, then data communication reliability is improved, but network throughput deteriorates
Solution Approach 1:
The system performs preliminary detection of wireless noise during idle periods (IFS) before data transmission occurs. By identifying noise sources and conditions in advance during these guard periods, the system can prepare countermeasures without interrupting ongoing data transmissions, thus maintaining both reliability and throughput.
Solution Approach 2:
The invention converts the previously wasted idle time (IFS) into a beneficial detection opportunity. By utilizing these mandatory guard periods for noise detection rather than leaving them completely empty, the system transforms a productivity-reducing element into a resource that improves reliability without further sacrificing throughput.
2Reliability
If wireless noise is detected and counteracted during active data transmission, then data communication reliability is improved, but data transmission time increases
Solution Approach 1:
The system performs noise detection during idle periods before data transmission begins, allowing countermeasures to be prepared in advance. This preliminary action ensures that when data transmission starts, the channel conditions are already optimized, eliminating the need for time-consuming interruptions during active transmission.
Solution Approach 2:
The system implements periodic noise detection during regularly occurring idle frames (IFS) in the wireless communication protocol. This periodic sampling of channel conditions during natural pauses in transmission provides continuous monitoring without requiring additional time beyond the protocol's existing structure.
3Reliability
If idle time periods are used for noise detection, then wireless noise mitigation is improved, but data transmission opportunities are reduced
Solution Approach 1:
The invention transforms the previously wasted idle time (IFS) into a valuable detection resource. By utilizing these mandatory guard periods for noise detection, the system converts a productivity-reducing element into an opportunity that improves noise mitigation without requiring additional time beyond what the protocol already allocates for idle periods.
Solution Approach 2:
The idle time periods serve dual functions: maintaining channel access rights (original purpose) and performing noise detection (new function). This multi-functionality allows the system to extract additional value from existing time slots without creating separate detection periods that would reduce transmission opportunities.
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 effectively mitigates wireless noise without reducing data communication performance, maintaining throughput by actively counteracting noise sources rather than relying on rate reduction or packet resending.
Implementation Method 1
detecting wireless noise within a time period specifically held after a data packet is wirelessly transmitted or wirelessly received... no data is purposefully wirelessly transmitted or wirelessly received during this time period
Implementation Method 2
The clock frequency at which the LCD is driven causes harmonics within a frequency range at which the data is being wirelessly communicated, such that driving the LCD causes the wireless noise
Implementation Method 3
generating an opposite-in-phase noise to cancel out detected noise from wireless signals
Data Source
AI summary
Wireless noise is detected within a time period specifically held after a data packet is wirelessly communicated, where no data is purposefully wirelessly communicated during this time period. The time period may be an inter-frame space (IFS) period within which no data is to be wirelessly communicated, and that is a period waited for prior to accessing a wireless medium over which data is wirelessly communicated. One or more actions are performed to counteract the noise. The frequency at which a liquid crystal display is being driven may be decreased so that harmonics caused thereby that caused the noise are no longer within the wireless communication frequency range. An opposite-in-phase version of the noise may also or alternatively be combined with a signal when data is subsequently wirelessly received. The signal includes a data component and a noise component, the opposite-in-phase version of the noise canceling out the noise component.