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Time synchronization method and apparatus

A time synchronization device and time synchronization technology, applied in the field of communication, can solve problems such as loss, time synchronization message congestion, poor time synchronization stability of network elements, etc., and achieve the effect of reducing time jitter and improving time synchronization stability

Inactive Publication Date: 2018-03-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a time synchronization method and device to overcome the congestion or loss of time synchronization messages in the prior art during the transfer of time synchronization messages between network elements The defect of poor time synchronization stability

Method used

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no. 1 example

[0051] In the first embodiment of the present invention, a time synchronization method, such as figure 2 shown, including the following specific steps:

[0052] Step S101, within the set time, any network element in the communication system except the first network element receives multiple time synchronization messages sent by the first network element, and any network element calculates according to each time synchronization message The time offset value between any network element and the first network element.

[0053] Within the set time, any network element in the communication system except the first network element receives a plurality of IEEE1588 (Institute of Electrical and Electronics Engineers 1588, Institute of Electrical and Electronics Engineers 1588) standard time synchronization reports sent by the first network element In this document, any network element calculates the time offset value between any network element and the first network element according t...

no. 3 example

[0088] The third embodiment of the present invention corresponds to the first embodiment. This embodiment introduces a time synchronization device, such as Figure 4 shown, including the following components:

[0089] The calculation module 100 is configured to receive multiple time synchronization messages sent by the first network element by any network element in the communication system except the first network element within a set time, and any network element is synchronized according to each time The packet calculates the time offset value between any network element and the first network element.

[0090] Specifically, the calculation module 100 is used for:

[0091] Within the set time, any network element in the communication system except the first network element receives a plurality of IEEE1588 (Institute of Electrical and Electronics Engineers 1588, Institute of Electrical and Electronics Engineers 1588) standard time synchronization reports sent by the first ne...

no. 5 example

[0133] The fifth embodiment of the present invention, this embodiment is based on the above embodiments, taking the system for time synchronization of the communication network through the IEEE1588 standard time synchronization message as an example, combined with the attached Figure 6 An application example of the present invention is introduced.

[0134] The time synchronization system of the communication network includes: a first network element 1000 and any network element 2000 .

[0135] Wherein, any network element 2000 includes: a line card FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) 2001 , a CPU (Central Processing Unit, central processing unit) 2002 and a main control FPGA 2003 . The number of any network element 2000 is one or more.

[0136] The first network element 1000 is configured to exchange IEEE1588 standard time synchronization packets with any network element 2000 .

[0137] The line card FPGA2001 is used to exchange IEEE1588 stan...

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Abstract

The invention provides a time synchronization method and apparatus. The method comprises the following steps: receiving a plurality of time synchronization messages sent by a first network element within a set time, and calculating a time deviation value of any network element and the first network element according to each time synchronization message; filtering the abnormal time deviation values, and calculating the average value of the filtered time deviation values; and adjusting the time of any network element as the average value. By adoption of the time synchronization method and apparatus, the time synchronization stability of the network elements in the communication system can be effectively improved, and the time jitter of the network elements is reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a time synchronization method and device. Background technique [0002] Different communication protocol standards have different requirements for time synchronization of network elements in the communication network. The traditional time synchronization adopts the GPS solution, and each network element receives the satellite time through the antenna for time synchronization. GPS installation has high requirements on the environment, and the construction cost is expensive. Therefore, time synchronization through the 1588 protocol has become a development trend. In the communication network, a master network element is connected to a high-precision master clock, and the master network element transmits the high-precision time to all slave network elements in the network through the 1588 protocol to realize time synchronization. [0003] The basic principle of time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00
CPCH04L7/0016H04L7/0087
Inventor 胡红张仁慧
Owner ZTE CORP
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