Dynamic Beacon Wake-Up Interval Adjustment for WLAN Power Savings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless local area networks (WLANs), stations face inefficiencies in power consumption due to unpredictable beacon transmission intervals, leading to either increased waiting times with higher power usage or missed beacons due to forward phenomena, disrupting stable communication.
Innovation Solution
A control method that dynamically adjusts the station's wake-up interval to match the real beacon transmission interval by computing and deriving a representative waiting time from multiple beacon receptions, ensuring consistent wake-up times and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the station operates in active mode before the predicted beacon time to ensure stable reception, then beacon reception stability is improved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the station's wake-up time based on actual beacon reception history. Instead of using a fixed predicted time, the system calculates a compensation value from the difference between predicted and actual beacon times over multiple intervals, and applies this compensation to dynamically adjust the wake-up time. This resolves the contradiction by making the wake-up timing adaptive rather than static.
Solution Approach 2:
The patent implements a feedback mechanism where the station monitors actual beacon reception times, calculates the difference from predicted times, and uses this information to adjust future wake-up times. The compensation value is derived from accumulated timing differences over multiple beacon intervals, creating a closed-loop system that continuously optimizes wake-up timing to match actual beacon transmission patterns.
2Reliability
If the station increases waiting time to account for beacon delays, then beacon reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the wake-up time based on actual beacon transmission patterns rather than using a fixed waiting time. The compensation value calculated from historical timing data allows the station to wake up precisely when needed, avoiding both premature wake-ups and excessive waiting.
Solution Approach 2:
The patent changes the wake-up time parameter dynamically by applying a compensation value derived from actual beacon timing observations. This adjusts the wake-up interval parameter to match the actual beacon transmission interval, optimizing both reliability and time efficiency.
3Use of energy by moving object
If the station uses a fixed beacon interval for wake-up timing, then power consumption is reduced, but beacon reception stability deteriorates due to timing mismatches
Solution Approach 1:
The patent transitions from a fixed beacon interval to a dynamic wake-up interval by applying compensation values derived from actual beacon reception timing. This allows the system to maintain low power consumption through infrequent wake-ups while ensuring accurate timing through adaptive interval adjustment.
Solution Approach 2:
The patent uses feedback from actual beacon reception times to adjust the wake-up interval. The compensation value calculated from timing differences is applied to modify the wake-up interval, creating a self-correcting system that maintains synchronization with the access point's actual beacon transmission rhythm.
Data Source
AI summary
A control method of beacon receiving time performed in a station that includes a receiving stage, receiving a first beacon n times from an access point (AP), and n is a natural number greater than or equal to 1; a computing stage, computing a first waiting time of a difference between a station wake-up time for receiving the first beacon and a receiving time of the first beacon every time of the n times of receiving; a deriving stage, deriving a representative value out of the n first waiting times; and a setting stage, setting a sum of a first beacon interval and the representative value of the first waiting times as a first wake-up interval of the station.