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Method and system for transferring protection time in synchronous network

A technology for protecting time and synchronizing network, which is applied in the field of network communication, and can solve problems such as reducing time synchronization and large transmission delay

Active Publication Date: 2009-06-24
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the time transfer technology used by most chip manufacturers to realize the functions of the 1588 protocol is not related to the synchronization network, resulting in a large transmission delay between the two border nodes. In the case of large-scale networking, the cumulative effect of phase transfer leads to The phase delay is more obvious, which reduces the synchronization of time

Method used

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  • Method and system for transferring protection time in synchronous network
  • Method and system for transferring protection time in synchronous network
  • Method and system for transferring protection time in synchronous network

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Embodiment Construction

[0036] Various preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] The present invention provides a method and system for protecting time transfer in a synchronization network. The time synchronization frequency of the synchronization network is used as the basis of the time synchronization protocol, which greatly improves the synchronization of time between network element nodes and reduces the number of network elements. The error of time transmission between nodes reduces the time error of large-scale networking and greatly meets the needs of users. Such as figure 1 Shown, comprise with the main steps of the inventive method:

[0038] A. Configure the synchronization network clock source participating in the selection, and configure the selection mode of the clock source; wherein the selection mode is a priority mode, a quality level mode or an extended quality level mode, and when the sel...

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Abstract

The invention discloses a method and a system for protecting time transfer in synchronization network; a corresponding module is added to the prior art to use time synchronization frequency of the synchronization network as the basis of time synchronization protocol, so the network is ensured to synchronously lock clock signal; a synchronization network clock source which participates in selection is configured, and the clock source selection mode is configured; current clock source is selected according to the selection mode, and the frequency state of the current clock source is synchronously locked; the current clock source state is used as state basis of accurate time protocol port to sequentially lock time of element location nodes in the synchronization network. The corresponding module is added to the prior art to use time synchronization frequency of the synchronization network as the basis of time synchronization protocol, so the time transfer error in element location nodes is greatly reduced, and the time error in large scale networking is reduced, and the stability of synchronization network is improved in the switching process of clock sources.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and system for protecting time transmission in a synchronous network. Background technique [0002] Time synchronization includes two types: frequency synchronization and time synchronization. Frequency synchronization means that the signals at the source end and the destination end maintain a certain relationship in frequency or phase, that is, the frequencies of the source end and the destination end remain the same within a certain accuracy. The phase difference is constant, which is commonly referred to as clock synchronization, such as synchronous Ethernet, E1 interface time synchronization, etc.; time synchronization refers to the situation that not only the frequency is the same but also the phase is the same. [0003] At present, wireless networks have two levels of time synchronization requirements, frequency synchronization and time synchronizatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04W56/00
CPCH04J3/0667
Inventor 何力郁志勇苏卉
Owner ZTE CORP
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