Method, system and device for sending time synchronization information

Abstract

The embodiment of the invention discloses a method for sending time synchronization information, comprising the following steps: receiving first time synchronization information from an optical line terminal (OLT), wherein the first time synchronization information is the local time synchronization information of the OLT, and comprises 1 pulse per second (1PPS) signals and time of day (ToD) signals; calculating the average period of the multiple continuous 1PPS signals in the first time synchronization information, and regulating the period of the next 1PPS signal or the next group of 1PPS signals to be the average period; and configuring the ToD signals and the 1PPS signals which are subjected to the period regulation into second time synchronization information and sending the second time synchronization information to a user terminal device so as to carry out time synchronization processing for the user terminal device. The embodiment of the invention also provides a system and device for sending time synchronization information.

Description

technical field [0001] The present invention mainly relates to time synchronization technology, and in particular, relates to a time synchronization information transmission method, system and device applicable to passive optical networks. Background technique [0002] Time synchronization usually refers to the limitation of the time deviation between the time synchronization information (year / month / day / hour / minute / second) of various communication devices or computer devices on the communication network and the Coordinated Universal Time (Universal Time Coordinate, UTC) A synchronization process in a sufficiently small range (say, within 100 milliseconds). Generally speaking, the computer's time is used to record the time synchronization information of events, such as e-mail information, file creation and access time, database processing time, etc., so time synchronization is widely used in computers on the Internet. Time synchronization can also be applied to network billi...

AI Technical Summary

Problems solved by technology

However, due to the sudden bending or vibration of the optical fiber on the transmission link due to the influence of external force, it will cause the line offset time between the optical line terminal and the optical network unit to change, resulting in the output of the optical network unit Sudden jitter occurs in time synchronization information

The sudden jitter of the above time synchronization information will reduce the time synchronization performance of the system

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