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Institute of electrical and electronic engineers (IEEE)-1588-protocol-based frequency regulation method and network device

A technology for adjusting frequency and network devices, applied in the field of data communication, can solve problems such as cost, difficult to find, errors, etc., and achieve the effect of reducing cost and improving frequency accuracy

Inactive Publication Date: 2011-09-14
ZTE CORP
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Problems solved by technology

However, these two methods have their disadvantages: the first method requires the master clock to support synchronous Ethernet and provide a stable frequency output for the entire network
If a certain TC device in the network chooses the wrong line recovery clock, it will cause the TC devices of the following nodes to lock on the wrong frequency, and it is not easy to find out.
The second method has a cost problem

Method used

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  • Institute of electrical and electronic engineers (IEEE)-1588-protocol-based frequency regulation method and network device
  • Institute of electrical and electronic engineers (IEEE)-1588-protocol-based frequency regulation method and network device
  • Institute of electrical and electronic engineers (IEEE)-1588-protocol-based frequency regulation method and network device

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0036] figure 1 It is a schematic diagram of a network device as a TC device according to an embodiment of the present invention, as shown in the figure, including the following modules:

[0037] The clock source module is used to provide frequency information for the TC device. In this embodiment, it is used to provide frequency information to the time stamp module; after receiving the frequency difference output by the micro-control module, the frequency difference is used to convert the The frequency information is adjusted to be the same frequency as the master clock inf...

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Abstract

The invention provides an institute of electrical and electronic engineers (IEEE)-1588-protocol-based frequency regulation method and a network device. The method comprises that: transparent clock equipment calculates a frequency difference of the transparent clock equipment relative to master clock equipment according to master clock information carried in a received IEEE 1588 protocol message and the time information of local stamping; and if judging the frequency difference meets preset conditions, the transparent clock equipment regulates the frequency of the local stamping to be the same as that of the master clock information carried in the IEEE 1588 protocol message by utilizing the frequency difference. By the method and the device, the frequency accuracy of the transparent clock (TC) equipment is effectively improved, and simultaneously, the cost is reduced.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to a method and network device for adjusting frequency based on the IEEE 1588 protocol. step clock) mode. Background technique [0002] The IEEE 1588 protocol is a precision clock synchronization protocol standard for network measurement and control systems. It adopts the PTP (Precise Clock Synchronization) protocol, and the precision can reach the microsecond level. At present, the intermediate devices in the IEEE 1588 protocol network are BC (boundary clock, boundary clock) devices and TC (transparent clock, transparent transmission clock) devices. Adopted by the majority of datacom manufacturers. The TC device mainly realizes the transparent transmission of the IEEE 1588 protocol in the network of the IEEE 1588 protocol. The accuracy of BC time synchronization, so the accuracy of TC residence time is related to the accuracy of the entire network clock. [0003] In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L29/06
CPCH04J3/0673H04J3/0667
Inventor 庞贺
Owner ZTE CORP
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