Wireless Device Channel Scan Based on Mobility State
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Solution Overview
Problem
Performing periodic channel scans on wireless devices consumes energy and disrupts data transmission, especially on mobile devices, as they often cannot transmit or receive data during scans, affecting performance and connectivity.
Innovation Solution
A method that determines a device's mobility state using time-of-flight information to decide when to perform a channel scan, reducing unnecessary scans and selecting a better access point based on mobility state to maintain signal strength and minimize handoffs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic channel scans are performed to find better access points, then connectivity quality is improved, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by adjusting the channel scan periodicity based on the device's mobility state. When the device is stationary, scans are performed less frequently to save energy. When the device is moving, scans are performed more frequently to maintain connectivity quality. This dynamic adjustment resolves the contradiction between maintaining good connectivity and reducing energy consumption.
Solution Approach 2:
The patent changes the parameter of scan periodicity based on mobility detection. By detecting whether the device is moving or stationary and adjusting the scan interval accordingly, the system optimizes the balance between connectivity quality and energy consumption, performing scans only when necessary.
2Reliability
If channel scans are performed frequently to maintain connectivity, then access point availability is improved, but data transmission performance deteriorates
Solution Approach 1:
The system dynamically adjusts scan frequency based on mobility state. When the device is stationary, scans are performed less frequently, allowing continuous data transmission without interruption. When moving, scans are performed more frequently to ensure access point availability. This resolves the contradiction between maintaining availability and preserving transmission performance.
Solution Approach 2:
The scan interval parameter is changed based on detected mobility conditions. By increasing the scan interval when stationary and decreasing it when moving, the system ensures access point availability while minimizing disruptions to data transmission performance.
3Adaptability or versatility
If channel scans are performed while connected to an access point, then better access points can be found, but transmission interruptions increase
Solution Approach 1:
The patent implements dynamic scan scheduling based on mobility state. When the device is stationary, scans are performed less frequently and with longer intervals, minimizing transmission interruptions. When the device is moving, scans are performed more frequently but with shorter durations, balancing the need to find better access points with minimizing time loss.
Solution Approach 2:
The system changes both the frequency and duration parameters of channel scans based on mobility detection. By adjusting these parameters dynamically, the system maintains the capability to find better access points while reducing overall transmission interruption time, especially when the device is stationary.
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 reduces energy consumption and improves connectivity by performing channel scans only when a better access point is likely available, minimizing handoffs and ensuring a stable connection while maintaining performance.
Implementation Method 1
determining a mobility state of the device based on time-of-flight information
Data Source
AI summary
Described herein are techniques for performing a channel scan based on a mobility state of a device. The mobility state of a device relative to an access point may be determined using time-of-flight information. A channel scan may be performed based on the mobility state determination.