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Method and device for restraining packet network PDV (Packet Delay Variation) noise and slave clock equipment

A packet network and noise technology, which is applied in the field of suppressing packet network PDV noise and slave clock equipment, can solve the problem of not being able to effectively suppress the PDV noise of the packet network

Active Publication Date: 2015-10-28
STATE GRID CORP OF CHINA +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a method, device, and slave clock device for suppressing PDV noise in a packet network to solve the problem that the current suppression method for PDV noise in a packet network cannot effectively suppress PDV noise in a packet network

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  • Method and device for restraining packet network PDV (Packet Delay Variation) noise and slave clock equipment
  • Method and device for restraining packet network PDV (Packet Delay Variation) noise and slave clock equipment
  • Method and device for restraining packet network PDV (Packet Delay Variation) noise and slave clock equipment

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Embodiment Construction

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0070] An embodiment of the present invention provides a method for suppressing PDV noise in a packet network, which is applied to such as figure 2 A shown packet network 22 comprising a plurality of slave clock devices (Super slaver for short) nodes 21; the slave clock device nodes 21, such as image 3 Shown includes PTP time signal receiving interface 301, GNSS signal receiving interface 302, PDV noise processing chip 303, phase detector 304, ...

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Abstract

The invention provides a method and device for restraining packet network PDV (Packet Delay Variation) noise and slave clock equipment, and relates to the technical field of packet networks. The method comprises the following steps: taming a local rubidium atomic clock according to a GNSS (Global Navigation Satellite System) satellite signal, determining the fixed time error of a PTP (Precision Time Protocol) time signal receiving interface, and performing fixed time delay error correction on PTP data packets; acquiring the corrected PTP data packets; selecting a target PTP data packet according to one or more of ITU-TG.8261 packet selection algorithms and the design parameter of each algorithm; determining a synchronization stability index corresponding to one or more algorithms; judging whether or not the synchronization stability index satisfy a preset threshold condition; when the synchronization stability index satisfy the threshold condition, performing time and frequency signal recovery processing on the target PTP data packet, and outputting a frequency signal and a PTP time signal to finish the deployment processing of a slave clock equipment node; and when the synchronization stability index does not satisfy the threshold condition, dynamically adjusting the design parameter, and returning a reselected target PTP data packet.

Description

technical field [0001] The invention relates to the field of packet network technology, in particular to a method, device and slave clock device for suppressing PDV noise in a packet network. Background technique [0002] At present, the PTP Precision Time Protocol (Precision Time Protocol, referred to as PTP) technology is used as an alternative to the Global Positioning System (Global Positioning System, referred to as GPS) to solve the time synchronization problem of 3G / 4G base stations, and has been used by telecom operators ( For example, China Mobile) has been piloted in the metropolitan area network; in some cities in the power system, a PTP time synchronization test network has also been established to provide high-precision time synchronization signals for the timing equipment in the substation. Although the use of PTP technology has established a time synchronization network for time transmission, and can provide sub-microsecond time synchronization signals for tim...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0644H04J3/0667
Inventor 吕博胡昌军汪建华常宁张军连纪文林福国周晓东刘刚李舒婷李信马跃张辉邢宁哲周则军汪洋高强滕玲陈希丁慧霞焦群黄杰马涛葛红武李伯中李伟华夏小萌白夫文唐佳王颖黄源源吴林
Owner STATE GRID CORP OF CHINA