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Group network realizing method for time synchronous network

A technology of time synchronization and implementation method, applied in the direction of synchronization devices, digital transmission systems, electrical components, etc., can solve the problem that the time interface cannot form a time-level synchronization network, etc., and achieves the goal of improving robustness, ensuring compatibility, and improving time accuracy. Effect

Active Publication Date: 2009-05-13
DATANG TELECOM TECH CO LTD
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AI Technical Summary

Problems solved by technology

It is used to solve the problem that a complete time-level synchronization network cannot be established using standard IRIG and DCLS time interfaces

Method used

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  • Group network realizing method for time synchronous network
  • Group network realizing method for time synchronous network
  • Group network realizing method for time synchronous network

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Embodiment Construction

[0054] The present invention utilizes the standard IRIG time interface to set up a time level synchronization network, and develops a time synchronization interface protocol for this purpose, which is compatible with the standard IRIG time synchronization interface protocol, and can be used to form a perfect and robust time level synchronization network, and The standard IRIG time synchronization interface protocol cannot build a complete and robust time level synchronization network.

[0055] Referring to Figure 1, the time synchronization interface protocol is shown in the figure, which is a complete IRIGB120 time frame format with a frame period of 1S and a code source interval of 10ms. Each frame starts with P0 and Pr positioning marks (high level, duration 8ms), followed by P1 to P9 segments. Between Pr and P5 is the Time of year information of BCD code, including the second information between Pr and P1 (effective digit 7), the minute information between P1 and P2 (effec...

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Abstract

This invention relates to networking method for time synchronous networks including: networking according to the reference time ranks of time synchronous node equipments to connect them rank by rank physically from the first rank node to N, every node receives the time synchronous interface protocol time frames sent by the last node and the next node device, said interface protocol time frame continues to use the IRIG standard time synchronous interface protocol and utilize year time and day time provided by time information segment and utilize the transmission time delay to regulate and carryout time synchronization based on the rank to provide local clock. Said time frame sets a leap second mark segment and a reference time rank information segment in the 27 effective bits control function sets of the IRIG standard time synchronous interface protocol to prompt the happening of leap seconds and designs networking time rank synchronous network to be compatible with the standard IRIG time interface network.

Description

technical field [0001] The present invention relates to the technical field of time synchronization, and more precisely relates to a method for realizing time synchronization network networking by using a time standard interface—IRIG (Inter Range Instrumentation Group) time synchronization interface protocol. Background technique [0002] Because of the difference between atomic time and the earth's rotation, for a long time, human beings have generally adopted the macroscopic motion period of celestial bodies as the standard for measuring time, which is the traditional astronomical time standard. Astronomical time is based on: (1) the Earth's rotation; (2) the Earth's orbital motion around the Sun; and (3) the Moon's orbital motion around the Earth. After the 1960s, the astronomical time standard was replaced by the atomic standard based on the microscopic movement of atoms inside the material, which is atomic time. Atomic time is based on seconds, not days. The Internatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/08H04L7/00
Inventor 曹骏楚鹰军
Owner DATANG TELECOM TECH CO LTD
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