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Method and device for time synchronization

A time synchronization and clock synchronization technology, applied in synchronization devices, time division multiplexing systems, digital transmission systems, etc., can solve problems such as clock synchronization solutions without isolated networks, and achieve easy management, ensure normal interaction, and achieve simple implementation. Effect

Inactive Publication Date: 2019-03-19
北京明朝万达科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a time synchronization method and device to solve the problem that there is no clock synchronization solution for isolated networks in the prior art

Method used

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  • Method and device for time synchronization

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Embodiment 1

[0028] refer to figure 1 , which shows a flow chart of steps of a time synchronization method provided by an embodiment of the present invention, which may specifically include the following steps:

[0029] Step 101: when acquiring the time synchronization request information sent by the external network data exchange clock server, record the sending time of the time synchronization request information.

[0030] The embodiment of the present invention can be applied in the scenario of clock synchronization between the internal network and the external network.

[0031] The system architecture provided by the embodiment of the present invention is described in detail as follows.

[0032] The network is isolated into an external network and an internal network, with a data exchange system, a data exchange clock system, a clock server, and various terminals. The external network terminal and the internal network terminal perform secure data exchange through the data exchange sys...

Embodiment 2

[0085] refer to figure 2 , which shows a schematic structural diagram of a time synchronization device provided by an embodiment of the present invention, which may specifically include:

[0086] The sending time recording module 210 is used to record the sending time of the time synchronization request information when obtaining the time synchronization request information sent by the external network data exchange clock server; the first receiving time recording module 220 is used to synchronize the time The request information is sent to the internal network data exchange clock server, and the first receiving time of the time synchronization request information received by the content data exchange clock server is recorded; the return time recording module 230 is used to obtain the data exchanged by the internal network data exchange clock server. The returned response message records the return time of the response message; the second receiving time recording module 240 i...

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Abstract

The invention provides a method and a device for time synchronization. The method comprises the following steps of: recording sending time of time synchronization request information when the time synchronization request information sent by an external network data exchange clock server is acquired; sending the time synchronization request information to an intranet data exchange clock server, andrecording the first receiving time of the time synchronization request information received by the intranet data exchange clock server; obtaining a response message returned by the internal network data exchange clock server, and recording return time of the response message; sending the response message to the external network data exchange clock server, and recording the second receiving time of the response message received by the external network data exchange clock server; and performing the time synchronization on the external network data exchange clock server depending on the transmittime, the first receiving time, the return time, and the second receiving time. According to the method and the device for the time synchronization, the requirements of the clock synchronization of the isolation network can be met, and normal interaction of the internal and external network programs is ensured.

Description

technical field [0001] The invention relates to the technical field of clock synchronization of internal and external networks, in particular to a time synchronization method and device. Background technique [0002] In some secret-related units, especially the public security system, the data network is generally divided into internal network and external network. Among them, the internal network refers to a confidential network, which is physically isolated from the Internet; the external network is the ordinary Internet. There is often a scenario where the internal network wants to securely obtain some data from the external network, or conversely, a computer on the external network wants to obtain data from the internal network. This involves data exchange and protection between different networks, so a data exchange system is required. On this basis, when the networks are isolated from each other, it is necessary to ensure that the system time of the devices under each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L7/00
CPCH04J3/0638H04J3/0667H04L7/00
Inventor 刘旺喻波王志海韩振国安鹏
Owner 北京明朝万达科技股份有限公司
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