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A method and device for time synchronism calibration

A technology of time synchronization and time deviation, applied in multiplexing communication, time division multiplexing system, electrical components, etc., can solve the problems of long synchronization correction time, poor anti-interference ability, low synchronization accuracy, etc., to achieve increased Anti-interference ability, improve synchronization accuracy, and have the effect of versatility

Active Publication Date: 2008-07-09
ZTE CORP
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Problems solved by technology

[0018] The disadvantage of this traditional time synchronization correction method is that due to the need to collect the receiving and sending time of multiple messages, its synchronization accuracy is low, the anti-interference ability is poor, and the synchronization correction time is long

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  • A method and device for time synchronism calibration
  • A method and device for time synchronism calibration
  • A method and device for time synchronism calibration

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Embodiment Construction

[0041] Various preferred embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0042] The method and device for time synchronization correction of the present invention have the core idea of ​​processing the time deviation value, and adopt different synchronization correction strategies according to different processing results and different synchronization stages. The time synchronization device of the present invention has a strong universal type and can be used in various synchronization protocols and various communication networks.

[0043] The method for communication network time synchronization of the present invention, as shown in Figure 2 and Figure 3, is used in the digital communication field, and it comprises the steps:

[0044] Step 1: Receive the time deviation value sent by the master side and the slave side after the synchronous communication is completed according to the 1588 protocol or it...

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Abstract

The invention discloses a method which is used for time synchronization correction in a digital communication network and comprises the following steps: a synchronization protocol module receives a time deviation value sent after the synchronization communication between a main side and a secondary side is finished, and the time deviation value of this time is compared with a time deviation value of last time, if the time deviation value of last time is larger than the time deviation value of this time and the filtering result is less than a predefined threshold, the precise synchronization correction with the correction step size less than the threshold is implemented. The method and a device of the invention which are used for implementing the time synchronization correction adopt the processing of time deviation value and different strategies of synchronization correction according to different processing results and different synchronization phases, thus effectively improving synchronization precision and anti-interference ability, being applicable for the synchronization correction of various communication networks and various synchronization protocols, and having universality.

Description

technical field [0001] The invention relates to a method and device for time synchronization correction in the field of digital communication, in particular to a method and device for time synchronization correction in a communication network. Background technique [0002] The IEEE 1588 protocol in the prior art, also known as the Precision Time Protocol, PTP (Precision Time Protocol), is a network time synchronization protocol proposed by the IEEE, which can realize high-precision time synchronization. This protocol is widely used in the fields of Ethernet, communication system, distributed system measurement and control, etc., and provides high-precision time correction and synchronization. [0003] When the IEEE 1588 protocol performs time synchronization, it first sends a time synchronization message. The message is sent by the master device in the form of multicast. All PTP devices in the same domain as the master device on the network segment will Receive the synchron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 郑伟高翔方永重
Owner ZTE CORP
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