Wireless LAN Bit Rate Estimation via Dynamic Channel Adaptation
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Solution Overview
Problem
In wireless LAN systems, existing methods for estimating transmission bit rates based on channel status are inaccurate, leading to frequent selection of non-optimized rates, resulting in high data transmission failure or inefficient channel occupation due to inappropriate bit rate settings, especially when using the block acknowledgement scheme.
Innovation Solution
A method that dynamically adjusts the transmission bit rate for some frames within a data block based on channel conditions by calculating and comparing throughputs and success/failure thresholds to determine optimal bit rate changes, allowing for gradual adaptation of bit rates according to changing channel environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a higher transmission bit rate is used to increase throughput, then data transmission speed is improved, but transmission failure probability increases
Solution Approach 1:
The patent applies dynamics by making the transmission bit rate adjustable and adaptive rather than fixed. The system dynamically selects from multiple candidate bit rates (e.g., 6 Mbps, 9 Mbps, 12 Mbps) based on real-time channel status measurements, allowing the transmission rate to vary according to current channel conditions to optimize both speed and reliability.
Solution Approach 2:
The patent changes the transmission bit rate parameter based on channel status measurements. By measuring channel status and selecting appropriate bit rates from a set of candidates, the system adjusts this critical parameter to achieve optimal performance, transforming a static parameter into a dynamic one that adapts to changing conditions.
2Reliability
If a lower transmission bit rate is used to increase transmission success rate, then transmission reliability is improved, but transmission efficiency decreases due to extended channel occupation
Solution Approach 1:
The system dynamically adjusts the transmission bit rate based on measured channel status rather than using a fixed low rate. This allows the system to achieve high reliability when needed while maintaining high efficiency when channel conditions permit, optimizing the trade-off between these two parameters through real-time adaptation.
Solution Approach 2:
The patent implements feedback by measuring channel status and using this information to select the optimal transmission bit rate. The measured channel status serves as feedback that guides the selection process, ensuring that the system achieves both reliability and efficiency by responding to actual channel conditions rather than using static rate selection.
3Measurement precision
If channel status is measured accurately to select optimized bit rate, then transmission optimization is improved, but measurement inaccuracy and rapid channel changes cause frequent non-optimized rate selection
Solution Approach 1:
The patent applies preliminary action by pre-defining a set of candidate bit rates (e.g., 6, 9, 12 Mbps) before actual transmission occurs. This pre-prepared list allows the system to quickly select from known options based on measured channel status, avoiding the need to calculate optimal rates in real-time and reducing the impact of measurement inaccuracies or rapid channel changes.
Solution Approach 2:
The system changes the approach to bit rate selection by using discrete, pre-defined candidate rates rather than continuous optimization. This parameter change allows the system to handle measurement imprecision more robustly, as the selection is made from a finite set of known values rather than requiring precise continuous measurement and calculation.
Data Source
AI summary
The present invention relates to a method for estimating an optimized transmission bit rate in a wireless local area network (LAN) system, which is to provide an accurate data transmission bit rate according to channel status when block data are transmitted in the wireless LAN system. According to the present invention, there is provided a method for estimating an optimized transmission bit rate according to the status of a data transmission bit rate in a wireless LAN system, comprising the steps of determining whether to change a current data transmission bit rate in a wireless LAN network; and estimating an optimized transmission bit rate on the basis of results of the determination in the determining step, and reflecting the estimated transmission bit rate upon transmission of data. The method is effective in that when data blocks are transmitted in the wireless LAN system, the performance degradation of data transmission invited due to an inappropriate selection of a transmission bit rate can be reduced.