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Method, device and system for realizing clock synchronization

A clock synchronization, real-time clock technology, applied in the field of communication, can solve the problem of poor time synchronization quality, and achieve the effect of improving time synchronization quality

Inactive Publication Date: 2010-07-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, based on the above three clock synchronization technologies, although clock synchronization in IP communication network equipment can be realized, it can only support time synchronization, or only support frequency synchronization, and the quality of time synchronization is poor.

Method used

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  • Method, device and system for realizing clock synchronization
  • Method, device and system for realizing clock synchronization
  • Method, device and system for realizing clock synchronization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the method for realizing clock synchronization includes:

[0032] S101. Obtain the timestamp group of each port;

[0033] S102. Select a time stamp from the time stamp group as a reference time stamp, and obtain synchronous clock control information according to the reference time stamp;

[0034] S103. Send the synchronous clock control information to each port, and the synchronous clock control information is used to provide each port for clock synchronization.

[0035] The method for implementing clock synchronization provided by the embodiment of the present invention selects a time stamp from the obtained time stamp group of each port as a reference time stamp, obtains synchronization clock control information according to the reference time stamp, and sends it to each port, Each port performs clock synchronization according to the synchronization clock control information. Compared with the prior art, the present invention selects the ...

Embodiment 2

[0037] Such as figure 2 As shown, the method for realizing clock synchronization includes:

[0038] S201. The port receives an IEEE1588 message encapsulation package.

[0039] S202. The port parses the IEEE1588 encapsulated packet, and extracts the time stamp of the corresponding packet according to the IEEE1588 protocol.

[0040] In the present invention, the time stamp refers to the time when the port receives or sends the message. Due to the difference of the system, the time stamp of each port may not be synchronized, that is, for the same type of message, the arrival time of the port is inconsistent, and the time stamp is also different. .

[0041] In this embodiment of the present invention, IEEE1588 is taken as an example for illustration, and other types of packets may also be used in other embodiments.

[0042] According to the requirements of the IEEE1588 protocol, time stamp identification is required at the PHY layer. However, the current PHY device cannot supp...

Embodiment 3

[0066] An embodiment of the present invention provides a clock synchronization device, which can realize clock synchronization of communication equipment and improve the quality of time synchronization.

[0067] Such as image 3 As shown, the clock synchronization device includes:

[0068] Obtaining module 301, configured to obtain the timestamp group of each port;

[0069] A clock synchronization module 302, configured to select a time stamp from the time stamp group as a reference time stamp, and obtain synchronous clock control information according to the reference time stamp;

[0070] The sending module 303 is configured to send the synchronous clock control information to each port, and the synchronous clock control information is used to provide each port for clock synchronization.

[0071] The clock synchronization device provided by the embodiment of the present invention selects a time stamp from the obtained time stamp group of each port as a reference time stamp,...

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Abstract

The embodiment of the invention discloses a method, a device and a system for realizing clock synchronization. The method for realizing the clock synchronization comprises the following steps: acquiring a time stamp group of terminals; selecting one time stamp to be used as a reference time stamp from the time stamp group and acquiring synchronous clock control information according to the reference time stamp; and transmitting the synchronous clock control information to each terminal, wherein the synchronous clock control information is provided for each terminal to perform time synchronization. The embodiment of the invention also discloses the device and the system for realizing the clock synchronization. The method, the device and the system are suitable for realizing the clock synchronization in IP communication network equipment.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method, device and system for realizing clock synchronization. Background technique [0002] Clock synchronization is an important indicator of transmission system design, it provides correct clock information for each device in the system, and improves the transmission quality and efficiency of the system. With the continuous development of Metro Ethernet technology, the clock synchronization problem of IP-based asynchronous communication network will become an urgent problem to be solved. question. [0003] With the development of IP network technology, various IP clock synchronization technologies—Ethernet physical layer synchronization, CESoP (Circuit Emulation Service Over Packet, circuit emulation service based on packets), TOP (Time Over Packet, clock recovery technology based on packets) ) gradually matured. Wherein, the Ethernet physical layer synchron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/04H04L1/16H04L12/56H04L29/06H04J3/06
Inventor 王晓波李丙博孙文华王继辉徐文广阳生丙邓友好
Owner HUAWEI TECH CO LTD
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