IoT Beacon Reception Using TSF Offset for Low-Power Synchronization
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Solution Overview
Problem
IoT devices face challenges in maintaining accurate time synchronization with access points due to incomplete reception of Beacon signals, leading to decreased synchronization accuracy and increased power consumption when actively skipping or preempting signal reception.
Innovation Solution
The method involves predetermining the average hardware processing time for Beacon signals and using this to calibrate local TSF values, allowing IoT devices to adjust their synchronization and prepare for the next signal reception, thereby reducing power consumption and maintaining synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If IoT devices actively skip or preempt Beacon signal reception to reduce power consumption, then power consumption is reduced, but time synchronization accuracy deteriorates
Solution Approach 1:
The system performs preliminary calibration by receiving complete Beacon signals initially to establish accurate TSF offset values. These pre-determined offset values are then stored and reused during subsequent operation, allowing the device to skip Beacon reception without recalibration while maintaining synchronization accuracy. The preliminary action creates a foundation that enables later energy-saving operations.
Solution Approach 2:
The device performs partial reception of Beacon signals by extracting only the essential TSF timestamp value rather than processing the entire signal. This partial action provides sufficient synchronization information while reducing power consumption compared to full signal processing. The TSF timestamp alone is enough to maintain synchronization without needing to analyze other Beacon signal components.
2Use of energy by moving object
If IoT devices process only part of the Beacon signal to reduce power consumption, then power consumption is reduced, but synchronization reliability deteriorates
Solution Approach 1:
The system continuously monitors synchronization accuracy by comparing the adjusted local TSF value with expected values. When drift is detected, the device resumes receiving complete Beacon signals to recalibrate the offset values. This feedback mechanism ensures synchronization reliability is maintained while allowing energy-saving mode to operate during normal conditions.
Solution Approach 2:
The system pre-determines and stores TSF offset values during initial calibration phases when complete Beacon signals are received. These pre-computed offset values are then applied during operation to maintain synchronization without requiring continuous full signal processing. The preliminary calculation of offset values provides a reliable foundation for ongoing synchronization.
3Speed
If IoT devices interrupt Beacon signal reception for higher priority communications, then communication responsiveness is improved, but time synchronization accuracy deteriorates
Solution Approach 1:
The device performs preliminary extraction of the TSF timestamp value from the Beacon signal before interrupting reception for high-priority communications. This preliminary action captures the essential synchronization data needed to maintain accuracy even when subsequent Beacon signals are skipped. The pre-captured timestamp enables the device to adjust its local clock without needing to complete full reception of interrupted signals.
Solution Approach 2:
The system extracts only the critical TSF timestamp information from the Beacon signal, separating this essential synchronization data from the rest of the signal content. This extraction allows the device to obtain sufficient synchronization information while minimizing reception time, enabling faster interruption for high-priority communications without sacrificing synchronization accuracy.
Data Source
AI summary
The present disclosure address systems and methods for improving the performance of Interest of Things (IoT) devices in receiving Beacon signals. The method includes receiving a first signal from an access point (AP) of a network environment, extracting a time synchronization value of the AP from the first signal, obtaining a local time synchronization value corresponding to the time synchronization value of the AP, and determining whether a preset condition is satisfied. The preset condition may indicate that the receiving of the first signal is to be interrupted. The method further includes in response to a determination that the preset condition is satisfied, obtaining a time synchronization offset value, adjusting the local time synchronization value based on the time synchronization offset value and the time synchronization value of the AP, and preparing to receive a second signal according to the adjusted local time synchronization value.