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Ring network node clock effectiveness judgment method and device

A determination method and a determination device technology, which are applied in the field of network clock synchronization in the field of network communication technology, can solve problems such as time failures, and achieve the effects of preventing time anomalies and enhancing maintainability.

Active Publication Date: 2014-03-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the BMC (Best Master Clock Algorithm) algorithm, B locks A, C locks B, and D locks C. Once the clock of node B is abnormal, at this time, when the link is normal, the time of nodes C and D will be also malfunctions

Method used

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  • Ring network node clock effectiveness judgment method and device
  • Ring network node clock effectiveness judgment method and device
  • Ring network node clock effectiveness judgment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: There are nodes with abnormal clocks in the network, but the clocks of the selected detection nodes are not abnormal.

[0067] refer to figure 1 , assuming that node A, that is, the clock time of the best master clock (Grandmaster clock) is credible, and the clock of node B in the network is abnormal, but it has not been detected. This paper takes node D as an example to gradually determine the existence of node B. question.

[0068] Node D has two time synchronization PTP ports on the left and right, and participates in BMC calculation. According to the BMC calculation result, node D selects node C or node E for time synchronization (assuming that node D is time synchronized with node C).

[0069] The first step is to confirm that the clock type of the nodes in the network is BC+TC, select the reference source node and the detection slave node, and enable the ring network protection function.

[0070] Node A is selected as the reference source node, nod...

Embodiment 2

[0078] Embodiment 2: There are nodes with abnormal clocks in the network, and the selected detection node is the node with abnormal clocks.

[0079] continue to refer figure 1 , assuming that the clock time of node A, that is, the best master clock (Grandmaster clock) is credible, and the clock of node B in the network is abnormal, but it has not been detected. This article takes node B as an example to determine that there is a problem with node B .

[0080] The first step is to confirm that the clock type of the nodes in the network is BC+TC, select the reference source node and the detection slave node, and enable the ring network protection function.

[0081] Node A is selected as the reference source node, node B is selected as the detection node, and the ring network protection function is enabled on both nodes A and B at the same time. The time deviation calculated on the time synchronization slave (Slave) port of node B and used for system time correction is recorded a...

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Abstract

The invention discloses a ring network node clock effectiveness judgment method and device. In the method, when network links and configuration are normal and each node has the clock / time synchronization function, a detection slave port having a normal time synchronization PTP port is selected from ring network nodes, at least one additional detection slave port is configured for the detection slave node, and an alarm is selected whether to be reported according to at least two sets of time deviation values calculated through the interaction between the detection slave port and the upstream equipment and between a BMC slave port comprised in the time synchronization PTP port and the upstream equipment separately, and if the difference value between the two sets of time deviation values exceeds a preset alarm threshold value, then the alarm is reported. According to the invention, through the selection of the detection port, the PTP message interaction between the ports and the calculation and comparison of the time deviation values, the ring network node clock effectiveness can be judged, and the alarm is reported.

Description

technical field [0001] The present invention relates to the field of network clock synchronization in the technical field of network communication, in particular to a method and device for judging validity of ring network node clocks. Background technique [0002] PTN (Packet Transport Network) refers to such an optical transport network architecture and specific technology: a layer is set between IP services and the underlying optical It is designed to meet the requirements of transmission, takes packet services as the core and supports multi-service provisioning, has a lower total cost of ownership (TCO for short), and at the same time upholds the advantages of optical transmission, including high availability and reliability, high efficiency Advanced bandwidth management mechanism and traffic engineering, convenient OAM (Operation Administration and Maintenance, operation, management, maintenance) and network management, scalability, high security, etc. [0003] At prese...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04J3/14
Inventor 万艳玲
Owner ZTE CORP
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