Wireless Access Point MCS Selection for Signal Attenuation
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Solution Overview
Problem
Conventional WiFi standards experience data packet loss and efficiency reduction due to dynamic re-negotiation of modulation-coding options in response to changing signal attenuation, leading to interruptions in wireless communication, especially in real-time video streaming.
Innovation Solution
Configuring wireless links to use a lower Modulation-Coding Scheme (MCS) encoding option to maintain reliable data transmission over increased signal attenuation, selecting a modulation-coding option that provides a higher signal-to-noise ratio and adequate capacity, even if it means reducing bit rates, thereby extending communication range and improving packet error performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic re-negotiation of modulation-coding options is performed to maintain maximum data rate, then productivity is improved, but reliability deteriorates due to data packet loss during re-negotiation
Solution Approach 1:
The system dynamically selects from multiple modulation-coding schemes based on current signal conditions, transitioning between different MCS indices to optimize for both throughput and reliability. The access point monitors link quality and adjusts the MCS index accordingly, allowing the system to adapt to changing wireless conditions while maintaining stable packet delivery.
Solution Approach 2:
The invention changes the modulation-coding scheme parameters (MCS index) based on signal attenuation conditions. By selecting appropriate MCS indices from available options, the system adjusts transmission parameters to balance data rate and packet error rate, resolving the contradiction between productivity and reliability.
2Productivity
If higher bit rate modulation-coding options are used to increase productivity, then productivity is improved, but reliability worsens due to increased susceptibility to signal attenuation
Solution Approach 1:
The system employs dynamic MCS index selection, transitioning between different modulation-coding schemes based on real-time signal quality assessment. When signal conditions deteriorate, the system switches to more robust lower-order modulation schemes, maintaining reliable packet delivery while adapting to changing conditions.
Solution Approach 2:
The invention adjusts modulation-coding parameters by selecting from multiple available MCS indices. This parameter change allows the system to optimize the trade-off between bit rate and packet error rate, choosing appropriate modulation orders and coding rates based on current channel conditions.
3Adaptability or versatility
If constant re-negotiation is performed to accommodate changing signal conditions, then adaptability is improved, but loss of time increases due to negotiation overhead and interruptions
Solution Approach 1:
The system performs preliminary assessment of signal conditions and pre-selects appropriate MCS indices from available options. By having pre-configured modulation-coding schemes ready for different signal conditions, the system reduces the time required for re-negotiation and minimizes communication interruptions during transitions.
Solution Approach 2:
The invention implements dynamic MCS index selection that adapts to changing signal conditions without requiring frequent full re-negotiations. The system monitors link quality and transitions between pre-defined MCS indices, providing adaptability while minimizing the time lost to negotiation overhead.
Data Source
AI summary
An access point receives notification of a bit rate setting specifying a throughput needed to transmit corresponding content to a communication device. Based on the bit rate setting, the wireless access point identifies a set of multiple possible modulation-coding options supporting transmission of data at different bit rates greater than the bit rate setting needed to transmit the corresponding content. The wireless access point selects a respective modulation-coding option that provides a throughput bit rate that is lower than a modulation-coding option in the set providing a highest possible throughput bit rate. Selection of the lower bit rate modulation-coding option provides adequate capacity to transmit the corresponding content, yet does so with a higher signal to noise ratio than would be provided by the higher bit rate modulation-coding option. Subsequent to selection, the wireless access point transmits the corresponding content to the communication device via the selected modulation-coding option.