Dynamic Listen Interval Adjustment in Wireless LAN Power Management
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Solution Overview
Problem
Existing power management modes in wireless LANs face challenges in minimizing reception delay and optimizing power saving, as the listen interval set for data reception may not align with actual data reception frequencies, leading to inefficiencies in both throughput and power consumption.
Innovation Solution
A wireless communication method that dynamically updates the listen interval to a shorter duration after data transmission and periodically increases it based on a defined table, ensuring timely data reception while maintaining power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the listen interval is increased to save power, then power consumption is reduced, but reception delay increases
Solution Approach 1:
The listen interval is made dynamic rather than fixed. The terminal adjusts the listen interval based on real-time communication needs, switching between longer intervals for power saving and shorter intervals for reduced delay, thereby resolving the contradiction between power consumption and reception delay
Solution Approach 2:
The patent changes the parameter of listen interval dynamically. By modifying this critical parameter based on communication activity levels and packet arrival patterns, the system optimizes the trade-off between power consumption and reception delay performance
2Use of energy by moving object
If the listen interval is set to match application data reception frequency, then power saving is optimized, but the terminal cannot adapt to varying data reception frequencies
Solution Approach 1:
The terminal implements feedback mechanisms to monitor actual data reception patterns and adjusts the listen interval accordingly. This feedback loop enables the terminal to adapt to varying data reception frequencies while maintaining power saving optimization
Solution Approach 2:
The listen interval transitions from a static value to a dynamic parameter that automatically adjusts based on observed communication patterns, allowing the terminal to adapt to changing data reception frequencies while optimizing power consumption
3Loss of time
If the base station controls the listen interval according to accumulated packets, then reception delay is minimized, but the base station processing load increases
Solution Approach 1:
Instead of the base station controlling the listen interval, the patent inverts the approach by having the terminal autonomously determine and adjust its own listen interval. This inversion transfers the control burden from the base station to the terminal, reducing base station processing load while maintaining reception delay minimization
Data Source
AI summary
In a wireless communication method of a wireless communication device to which a power management mode of a wireless LAN is applied and to which a parent device communicates, the method includes updating a listen interval of receiving a beacon signal from a parent device to be shorter than a current listen interval in response to a data transmission to the parent device; and periodically increasing the updated listen interval between the time span from the data transmission to a next data transmission, wherein reception of the beacon signal is carried out after switching from a doze state to an awake state.