Wireless Channel Selection Using Dual Threshold Interference Measurement
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Solution Overview
Problem
Wireless communication devices face interference issues due to concurrent transmission waves, even when electric field intensity is below the carrier sense threshold, affecting reception sensitivity and making it difficult to determine the availability of transmission time and interference frequency.
Innovation Solution
A wireless communication device measures electric field intensity across multiple channels, using both a carrier sense threshold and a detrimental interference level threshold to count exceedances, allowing selection of a channel with lower interference for improved communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the carrier sense threshold is used as the electric field intensity threshold, then the available transmission time can be determined, but the reception sensitivity deteriorates due to interference from concurrent transmission waves equal to or less than the carrier sense threshold
Solution Approach 1:
The single threshold approach is segmented into two distinct thresholds: the carrier sense threshold for determining transmission availability and the detrimental interference level for assessing reception quality. This segmentation allows independent optimization of transmission time determination and reception sensitivity protection.
Solution Approach 2:
The invention changes the parameter structure by introducing a second threshold (detrimental interference level) that is distinct from the traditional single carrier sense threshold. This parameter change enables the system to differentiate between transmission blocking conditions and reception interference conditions.
2Measurement precision
If multiple thresholds are used to determine channel availability, then the interference frequency can be determined, but the device complexity increases
Solution Approach 1:
The detrimental interference level is predetermined based on the reception sensitivity characteristics of the wireless communication device. This preliminary establishment of the second threshold simplifies the measurement process by providing a fixed reference point for interference assessment, rather than requiring complex real-time calculations.
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 enables determination of transmission time and interference frequency, allowing for the selection of less interfered channels, thereby prolonging available transmission time and enhancing communication efficiency.
Implementation Method 1
an electric field intensity measurer measures the electric field intensity of each of multiple communication channels available for data communication repeatedly multiple times
Data Source
AI summary
An electric field intensity measuring circuit measures the electric field intensity of each of multiple communication channels available for data communication. A channel determiner compares electric field intensities measured by an electric field intensity measuring circuit with multiple different thresholds including a first threshold as the carrier sense threshold and a second threshold that is the detrimental interference level the interference of which causes the reception sensitivity to deteriorate, counts the numbers of times that the electric field intensity exceeds the thresholds on each communication channel, and selects a communication channel for use based on the counted numbers of times that the thresholds have been exceeded on the communication channels.