Dynamic Wake-Up Time Adjustment for Wireless Beacon Reception
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Solution Overview
Problem
Wireless communication devices face challenges in determining an optimal wake-up time due to timing errors caused by interference and hardware delays, leading to premature activation or loss of beacon frames, which results in excessive power consumption and compromised communication quality.
Innovation Solution
A method for dynamically adjusting the wake-up time of a receiving circuit in multiple phases, using a processor to estimate timing errors and update correction values, allowing for real-time adjustments to improve beacon frame detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving circuit is turned on earlier to account for timing errors, then beacon frame reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic wake-up time adjustment by continuously estimating timing errors from received beacon frames and adapting the wake-up time accordingly. The system transitions from a static wake-up time to a dynamic one that self-adjusts based on actual timing error measurements, resolving the contradiction between reliability and power consumption by optimizing the wake-up time to the minimum necessary value.
Solution Approach 2:
The system employs feedback mechanisms by measuring the timing error between the expected beacon frame arrival time and the actual reception time, then using this feedback to adjust future wake-up times. This closed-loop control ensures the receiving circuit wakes up at the optimal moment, improving reliability while minimizing unnecessary early activation that would increase power consumption.
2Use of energy by moving object
If the receiving circuit is turned on at the predetermined wake-up time, then power consumption is reduced, but timing errors cause beacon frame loss
Solution Approach 1:
The patent transforms the static predetermined wake-up time into a dynamic adjustable parameter. By continuously measuring timing errors and adjusting the wake-up time accordingly, the system maintains optimal beacon frame reception reliability while avoiding excessive power consumption from premature activation.
Solution Approach 2:
The system performs self-adjustment by autonomously measuring its own timing errors and correcting its wake-up time without external intervention. This self-service mechanism ensures the receiving circuit operates at the optimal balance point between power consumption and reception reliability.
3Measurement precision
If multiple phases with different adjustment steps are used to dynamically adjust wake-up time, then timing error reduction precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the timing error correction process into multiple phases with different adjustment steps. The first phase uses a first adjustment step for coarse correction, while the second phase uses a second adjustment step for fine correction. This segmentation enables high precision timing error reduction while keeping each individual phase relatively simple.
Solution Approach 2:
The system dynamically adjusts the adjustment step size based on the current timing error magnitude and phase. This dynamic adaptation allows the system to achieve high precision without requiring complex fixed-step mechanisms, as the complexity is managed through adaptive control rather than fixed complex structures.
Data Source
AI summary
A method for dynamically adjusting wake-up time for a communication device includes: estimating a timing error for each reception in a first phase and determining a first basic correction value according to the timing errors obtained in the first phase, estimating a timing error for each reception in a second phase, updating a second basic correction value according to a trend of the timing errors and determining a first timing correction value according to the timing errors obtained in the second phase, and estimating a timing error for each reception in a third phase, updating a third basic correction value according to a trend of the timing errors recently obtained, and updating the wake-up time in the third phase according to the first timing correction value and the third basic correction value.