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Network time clock tracking method, network apparatus and network system

A technology for clock tracking and network equipment, applied in the field of communication, can solve the problems of unable to find the clock source, manually plan the clock tracking path, etc., to achieve the effect of realizing fast clock switching and overcoming the clock tracking path

Inactive Publication Date: 2008-12-31
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. In the MESH network, since the number of network devices connected to each network device is more than the traditional ring network and chain network, generally more than two, it is difficult to manually plan a suitable clock track path
[0006] 2. Most network devices can only be configured with two reference clock sources as protection. When the reference clock sources configured by the network device fail, the network device cannot find the clock source that needs to be tracked

Method used

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  • Network time clock tracking method, network apparatus and network system
  • Network time clock tracking method, network apparatus and network system
  • Network time clock tracking method, network apparatus and network system

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Embodiment Construction

[0026] The method in the embodiment of the present invention may specifically be:

[0027] Such as Figure 5 Shown is the flow chart of the method for clock tracking in the embodiment of the present invention, and the implementation process is as follows:

[0028] Step 501: The network device obtains its own clock tracking path. Specifically, after the network topology changes and the network is initialized, the network device perceives the network topology change, and uses corresponding algorithms (such as the shortest path first algorithm, the minimum spanning tree algorithm, etc.) etc.), the clock tracking path is the shortest path from the clock source to the network device, and the perception of network topology changes can be realized by receiving network topology change messages. The clock source access network device refers to the network device connected to the clock source.

[0029] Step 502: The network device judges whether its own clock tracking path has changed...

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Abstract

The invention discloses a method for tracking a network clock, a network device and a network system, wherein, the clock tracking route of the network device in a network is obtained; if the clock tracking route of the network device changes, a request message is sent to an adjacent upstream network device on the clock tracking route of the network device; an response message returned by the upstream network device is received, and a clock tracking is carried out according to the response message. Therefore, the method of the invention can realize fast switching and tracking of the clock.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a network clock tracking method, network equipment and a network system. Background technique [0002] In a communication network, the clock is a very important factor, because it is directly related to the quality of the transmitted service. If there is a problem with the clock, it will cause the pointer adjustment of the Synchronous Digital Hierarchy (SDH) to change at the slightest, or cause the data flow to slip and damage, resulting in data errors. Therefore, it is necessary to ensure that the clocks of the devices on the entire network are synchronized, and when the topology of the network changes and when the network is initialized, it is necessary to ensure fast switching and tracking of the clocks of each network device on the entire network. [0003] In a traditional network, since the topology of the network is relatively simple, mainly a ring network and a chai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/02H04L1/16H04J3/06
CPCH04J3/14H04J3/0679
Inventor 冯俊杰王彧赵敏季魁文石兴华饶宝全
Owner HUAWEI TECH CO LTD