Device and method for realizing time synchronization on Ethernet switch

A time synchronization, Ethernet technology, applied in the field of network switches, can solve the problems of high cost and limited transmission distance, and achieve the effect of low cost and improved time synchronization accuracy

Inactive Publication Date: 2012-04-04
SUZHOU CENTEC COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, whether it is NTP or IRIG-B code, its synchronization accuracy can only r...

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  • Device and method for realizing time synchronization on Ethernet switch
  • Device and method for realizing time synchronization on Ethernet switch
  • Device and method for realizing time synchronization on Ethernet switch

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0036] Such as figure 2 As shown, in a specific embodiment of the present invention, in order to achieve the purpose of time synchronization, a device for realizing time synchronization on an Ethernet switch is provided, including: a central processing unit (CPU) module 101, a switch (Switch) module 102 . A physical (PHY) module 103 and a clock processing module 104 .

[0037] Among them, the Switch module: it may include ports (1, 2...N), respectively connected to N physical (PHY) modules to realize communication with them. The Switch module is mainly used to identify the IEEE1588 message and extra...

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Abstract

The invention discloses a method and a device for realizing time synchronization on an Ethernet switch. The device comprises a Switch module, a plurality of PHY (Physical layer) modules, a CPU module and a clock processing module, wherein the clock processing module comprises a clock synchronization sub-module and a clock production sub-module. The clock can be synchronized according to the clock provided by the PHY module through adopting the time delay measuring technology provided by the synchronic Ethernet (SyncE, SynchronousEthernet) protocol and the IEEE1588 protocol, then the reference input clock needed by the relative modules in the system can be produced, and the frequencies of the main device and the auxiliary device are synchronized. Because of adopting the PHY chip with SyncE function, the frequency synchronization precision is very high, which can reach nanosecond level.

Description

technical field [0001] The invention relates to network switch technology, in particular to a device and method for realizing nanosecond-level precision time synchronization on an Ethernet switch. Background technique [0002] In an industrial network, it is often required that different devices of the network are in a synchronous state, and under this condition, the communication between devices is coordinated. At present, Ethernet networking technology is one of the fastest growing technologies in the industrial market. Therefore, realizing time synchronization on industrial Ethernet switches can well meet the development needs of current industrial networks. [0003] Now some industrial switches use Network Time Protocol (NTP, Network Time Protocol) and IRIG-B codes for time synchronization. Among them, NTP is a standard protocol for time synchronization in the Internet. It adopts statistics and probability theory. Information from different time servers is screened to o...

Claims

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Application Information

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IPC IPC(8): H04L7/00H04L12/56
Inventor 李庆山秦立峰
Owner SUZHOU CENTEC COMM CO LTD
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