Terminal Delay Calibration for Timerless Network Synchronization
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Solution Overview
Problem
Device groups without accurate timers or with inaccurate timers due to network issues like delay, packet loss, or error packets cannot synchronize with a world standard clock, leading to network synchronization failures.
Innovation Solution
A terminal device calculates round-trip delays and determines a delay calibration method using probabilistic statistics to synchronize devices without timers by adjusting their timing based on feedback signals and probabilistic statistical methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices use traditional timer-based network synchronization methods, then devices with accurate timers can achieve synchronization, but devices without timers or with inaccurate timers due to network problems cannot synchronize
Solution Approach 1:
The patent introduces a terminal device as an intermediary that coordinates delay calibration among devices in the group. This mediator sends calibration instructions, collects feedback signals, calculates round-trip delays, and determines calibration values, enabling devices without timers to synchronize through the intermediary's coordination rather than requiring each device to independently maintain accurate timer state
Solution Approach 2:
The patent implements a feedback mechanism where devices send feedback signals containing timing information (such as receipt time of calibration instructions or send time of feedback) back to the terminal device. The terminal device uses this feedback to calculate actual transmission delays and determine calibration values, creating a closed-loop system that continuously adjusts timing based on observed network conditions
2Measurement precision
If devices send and receive signals for synchronization calibration, then timing can be adjusted, but network delays, packet loss, and error packets cause timer inaccuracy
Solution Approach 1:
The patent performs preliminary delay calibration by sending calibration instructions and receiving feedback signals before actual synchronized operations begin. This preliminary action establishes baseline timing characteristics and allows the system to pre-compensate for known delays, ensuring that subsequent synchronized operations proceed with accurate timing even under network conditions that would normally cause timer drift
Solution Approach 2:
The patent sends multiple calibration instructions and collects multiple feedback signals to gather sufficient timing data for accurate delay calculation. By performing more calibration measurements than the minimum single exchange, the system can average out random variations and identify patterns in network delay, achieving higher measurement precision despite the presence of network problems
Data Source
AI summary
The present application provides a device delay calibration method, a terminal device and a storage medium. The terminal device communicates with a device group, and the method includes: sending a preset instruction to at least one device in the device group, and receiving a feedback signal corresponding to the preset instruction from the at least one device; calculating a round-trip delay of a signal transmission between the terminal device and the at least one device according to the preset instructions and the feedback signal; based on the round-trip delay, calculating a delay determination base corresponding to the at least one device; performing a delay calibration on the at least one device according to the delay determination base. The above method is used to enable the device group to perform a network synchronization when the device group does not have a timer or the timer is inaccurate.