WiFi Scanning Frequency Adjustment for Mobile Device Power Optimization
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Solution Overview
Problem
The high power consumption of mobile devices during periodic WiFi scanning leads to reduced battery durability, as existing methods do not adjust scanning frequencies based on location changes, resulting in unnecessary energy expenditure.
Innovation Solution
A method that adjusts the WiFi scanning frequency of mobile devices based on the distance threshold of location changes, reducing scanning frequency when movement is minimal and increasing it when movement is significant, thereby optimizing power usage without affecting network access performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device performs periodic WiFi scanning at fixed intervals, then the network access performance is maintained, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the WiFi scanning frequency adjustable rather than fixed. The scanning frequency is dynamically changed based on the mobile device's movement state: when the device is stationary or moving slowly, the scanning frequency is reduced to save power; when the device is moving quickly, the scanning frequency is increased to maintain network access performance. This resolves the contradiction by adapting the scanning behavior to actual usage conditions.
Solution Approach 2:
The patent changes the parameter of scanning frequency based on movement detection. By comparing the current location with historical location data, the system determines whether the device is moving and adjusts the scanning frequency parameter accordingly. This parameter change allows the system to maintain network performance when needed while reducing power consumption when movement is minimal.
2Reliability
If the mobile device increases scanning frequency to maintain network access, then the network communication quality is improved, but the battery duration decreases
Solution Approach 1:
The patent uses periodic action by implementing periodic WiFi scanning with variable intervals. Instead of continuous scanning, the system performs scans at periodic intervals that are adjusted based on movement detection. When the device is stationary, longer intervals are used to extend battery duration; when moving, shorter intervals maintain network communication quality. This periodic approach with adaptive intervals resolves the contradiction between network quality and battery life.
Solution Approach 2:
The scanning interval is made dynamic rather than static. The system continuously monitors movement state and adjusts the scanning interval in real-time. This dynamic adjustment allows the system to extend battery duration during stationary periods while maintaining network communication quality during movement, resolving the contradiction between these two requirements.
3Reliability
If the mobile device performs active scanning to discover access hotspots, then the signal strength is improved, but the power consumption increases
Solution Approach 1:
The patent changes the scanning parameter (frequency/interval) based on movement state. When the device detects minimal movement, it reduces the scanning frequency to lower power consumption while maintaining sufficient signal strength detection. When movement is detected, the scanning frequency is increased to ensure optimal signal strength is found. This parameter adjustment resolves the contradiction between signal strength and power consumption.
Solution Approach 2:
The scanning behavior is made dynamic by continuously monitoring movement and adjusting scanning frequency accordingly. This dynamic approach ensures that active scanning is performed at optimal frequencies: high enough to discover strong signal hotspots when needed, but low enough to conserve power during stationary periods. The dynamic adjustment resolves the contradiction between signal strength improvement and power consumption reduction.
Data Source
AI summary
A Wireless Fidelity network scanning method and a mobile device are provided. The method includes: obtaining, by a mobile device, information about a distance between a location of the mobile device at a first time point and a location of the mobile device at a second time point, where the first time point is a time point later than the second time point; determining, by the mobile device, that the information about the distance is less than a first distance threshold, and adjusting a first scanning frequency at which the mobile device scans a WiFi network to a second scanning frequency, where the second scanning frequency is less than the first scanning frequency; and scanning, by the mobile device, the WiFi network according to the second scanning frequency.