CN113872720A - Secret-related network time synchronization system and time service method - Google Patents
Secret-related network time synchronization system and time service method Download PDFInfo
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- CN113872720A CN113872720A CN202111179915.XA CN202111179915A CN113872720A CN 113872720 A CN113872720 A CN 113872720A CN 202111179915 A CN202111179915 A CN 202111179915A CN 113872720 A CN113872720 A CN 113872720A
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- module
- bpc
- time
- clock
- clock module
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
Abstract
The invention discloses a time synchronization system and a time service method for a secret-related network, which can synchronize the time of the secret-related network, the GNSS receiver and the BPC module are both in communication connection with the clock module, the GNSS receiver can receive satellite navigation signals and send resolved time information to the clock module, the BPC module can receive BPC low-frequency time code information and send the resolved time information to the clock module, the clock module is in communication connection with the secret-involved network, the clock module can receive the time information output by the GNSS receiver and the BPC module to adjust an internal clock in real time and send the internal clock to the secret-involved network, the GNSS receiver, the BPC module and the clock module are all in communication connection with the control module, and the control module can control the operation of the GNSS receiver, the BPC module and the clock module.
Description
Technical Field
The invention relates to the technical field of time service, in particular to a time synchronization system and a time service method for a secret-related network.
Background
The time frequency is an important basic physical quantity and plays an important role in national economy and basic scientific research. It is the most accurate basic physical quantity at present, has good transferability, and is closely related to daily life of people. With the rapid development of electronic information technology and internet, the time synchronization requirements of high-accuracy time services such as electronic commerce, electronic government affairs and the like on the whole society are more and more strict, and public service systems such as medicine industry, traffic field, education system, financial industry, telecommunication, mobile communication, power grid digital substation, electronic parking timing charging system and the like need to realize safe, reliable and high-accuracy time synchronization.
With the widespread use of networks and information systems, security issues become the focus of attention. The security measures of physical isolation are generally adopted between the secret-involved networks such as an intranet and the internet, and the security of the internal network is ensured to a certain extent. Meanwhile, in a complex network environment, an intranet and other security networks often consist of different operating systems, servers, firewalls, intrusion detection and other security products. Once the network is attacked, the professional can extract the logs in different log systems for analysis. The time of the different systems is not calibrated at all, which unnecessarily increases the workload of the log analyst. Therefore, a clock source with uniform time in the whole network needs to be provided by adopting a technical means, terminal devices such as computers of secret-related networks like the whole intranet are unified into standard time, and time consistency of the internal system of the whole network is realized, so that an effective intrusion detection and post-investigation mechanism is provided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a time synchronization system and a time service method for a secret-related network, which can synchronize the time of the secret-related network and cannot threaten the network information security.
In order to achieve the above object, the present invention provides a time synchronization system for a secret-involved network, including a GNSS receiver and a BPC module, wherein the GNSS receiver is provided with a GNSS antenna, the BPC module is provided with a BPC antenna, the GNSS receiver and the BPC module are both communicatively connected to a clock module, the GNSS receiver can receive satellite navigation signals via the GNSS antenna and send resolved time information to the clock module, the BPC module can receive BPC low-frequency time code information via the BPC antenna and send the resolved time information to the clock module, the clock module is communicatively connected to the secret-involved network, the clock module can receive the time information output by the GNSS receiver and the BPC module to adjust an internal clock in real time and send the time information to the secret-involved network for time synchronization, and the GNSS receiver, the BPC module and the clock module are all communicatively connected to a control module, the control module may be capable of controlling the operation of the GNSS receiver, the BPC module and the clock module.
Furthermore, the clock module is in communication connection with an external communication interface, the clock module performs information interaction with the secret-involved network through the external communication interface, and the external communication interface is in control connection with the control module.
Further, the external communication interface is a plug and play format interface.
Further, the clock module is provided with an LED screen, and the LED screen is used for displaying time and date.
Further, the clock module is provided with an abnormity alarm module.
Further, the control module is an embedded hardware platform.
The invention also provides a time service method adopting the secret-related network time synchronization system, which comprises the following steps: the GNSS receiver receives satellite navigation signals through the GNSS antenna and sends the resolved time information to the clock module; the BPC module receives BPC low-frequency time code information through the BPC antenna and sends the resolved time information to the clock module; the clock module receives the time information output by the GNSS receiver and the BPC module to adjust the internal clock in real time; and if the security-involved network needs time synchronization, the clock module is accessed to the security-involved network for time synchronization.
Further, the satellite navigation signals comprise Beidou and GPS satellite navigation signals.
Furthermore, the clock module performs information interaction with the secret-related network through an external communication interface in a plug and play mode.
Compared with the prior art, the system has multiple time acquisition means such as GNSS, BPC and the like, covers all areas of China, and simultaneously backups each other; the system is a one-way time leading-in system, only when the secret-involved network needs time synchronization, the clock module is connected into the secret-involved network, no threat to network information safety is formed, a clock source with uniform whole network time can be provided, the terminal devices such as computers of the whole secret-involved network are unified into standard time, the time consistency of the system in the whole network is realized, and therefore an effective intrusion detection and post-investigation mechanism is provided.
Drawings
Fig. 1 is a schematic block diagram of the time synchronization system of the secret-involved network of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and specific examples in the specification, and it should be understood that the examples described are only a part of the examples of the present application, and not all examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The invention provides a time synchronization system of a secret-related network, which can be used in multiple industries such as national defense, government offices, electric power, finance, communication, traffic, radio and television, security protection, water conservancy, petrifaction, metallurgy, medical treatment, education, IT and the like, and the system comprises a GNSS receiver, a GNSS antenna, a BPC module, a BPC antenna, a clock module, a control module and an external communication interface, which are shown in figure 1.
Specifically, the GNSS receiver is connected with the GNSS antenna, the BPC module is connected with the BPC antenna, the GNSS receiver and the BPC module are both in communication connection with the clock module, the GNSS receiver can receive satellite navigation signals such as Beidou and GPS through the GNSS antenna, and the time information of resolving can be sent to the clock module. The BPC module can receive BPC low frequency time code information through the BPC antenna and can give the clock module the resolved time information. The clock module is in communication connection with an external communication interface, the clock module performs information interaction with the secret-involved network through the external communication interface, the clock module can receive time information output by the GNSS receiver and the BPC module to adjust the internal clock in real time and send the time information to the secret-involved network through the external communication interface for time synchronization, the GNSS receiver, the BPC module, the clock module and the external communication interface are all in communication connection with the control module, and the control module can control the operation of the GNSS receiver, the BPC module, the clock module and the external communication interface.
The clock module is provided with an LED screen, the LED screen is used for displaying time and date, the clock module is provided with an abnormity alarm module and is used for giving out abnormity alarm, the clock module is internally provided with an oscillating circuit, a clock function, a calendar function, an abnormity alarm function and the like, the clock module can independently generate and keep the clock to normally operate, the time and date can be displayed on the LED screen, and the clock module can receive time signals output by the GNSS receiver and the BPC module and adjust an internal clock in real time. The control module adopts an embedded hardware platform to carry out comprehensive management control on the operation condition of each module. The external communication interface is an information interaction interface of the time synchronization system and the secret-involved network, and is convenient to use in a plug-and-play mode.
The invention also provides a time service method adopting the system, which comprises the following steps: the GNSS receiver receives satellite navigation signals including Beidou, GPS and the like through a GNSS antenna and sends the resolved time information to the clock module; the BPC module receives BPC low-frequency time code information through a BPC antenna and sends the resolved time information to the clock module; the clock module receives time information output by the GNSS receiver and the BPC module to adjust the internal clock in real time; and if the secret-related network needs time synchronization, the information interaction is carried out with the secret-related network through the external communication interface in a plug-and-play mode, and the clock module is accessed to the secret-related network for time synchronization.
The invention has a plurality of time acquisition means such as GNSS, BPC, etc., covers all areas of China, and simultaneously backups each other; the system is a one-way time leading-in system, is only accessed into the intranet when the intranet needs time synchronization, and cannot threaten the network information safety. And a clock source with uniform time of the whole network is provided, computers of the whole intranet are unified into standard time, and the time consistency of the internal system of the whole network is realized, so that an effective intrusion detection and post-investigation mechanism is provided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A secret-involved network time synchronization system is characterized by comprising a GNSS receiver and a BPC module, wherein the GNSS receiver is provided with a GNSS antenna, the BPC module is provided with a BPC antenna, the GNSS receiver and the BPC module are both in communication connection with a clock module, the GNSS receiver can receive satellite navigation signals through the GNSS antenna and send resolved time information to the clock module, the BPC module can receive BPC low-frequency time code information through the BPC antenna and send the resolved time information to the clock module, the clock module is in communication connection with a secret-involved network, the clock module can receive the time information output by the GNSS receiver and the BPC module to adjust an internal clock in real time and send the internal clock to the secret-involved network for time synchronization, and the GNSS receiver, the BPC module and the clock module are all in communication connection with a control module, the control module may be capable of controlling the operation of the GNSS receiver, the BPC module and the clock module.
2. The time synchronization system of claim 1, wherein the clock module is communicatively connected to an external communication interface, the clock module performs information interaction with the secret-related network through the external communication interface, and the external communication interface is connected to the control module in a control manner.
3. The system of claim 2, wherein the external communication interface is a plug and play interface.
4. The time synchronization system of claim 1, wherein the clock module is provided with an LED screen for displaying time and date.
5. The time synchronization system of claim 1, wherein the clock module is provided with an anomaly alarm module.
6. The system of claim 1, wherein the control module is an embedded hardware platform.
7. A time service method adopting the time synchronization system of the confidential network as claimed in any one of claims 1 to 6, characterized by comprising: the GNSS receiver receives satellite navigation signals through the GNSS antenna and sends the resolved time information to the clock module; the BPC module receives BPC low-frequency time code information through the BPC antenna and sends the resolved time information to the clock module; the clock module receives the time information output by the GNSS receiver and the BPC module to adjust the internal clock in real time; and if the security-involved network needs time synchronization, the clock module is accessed to the security-involved network for time synchronization.
8. The time service method of claim 7, wherein the satellite navigation signals include Beidou and GPS satellite navigation signals.
9. The time service method of claim 7, wherein the clock module performs information interaction with the secret-involved network through an external communication interface in a plug and play manner.
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| CN202111179915.XA CN113872720A (en) | 2021-10-11 | 2021-10-11 | Secret-related network time synchronization system and time service method |
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| CN202111179915.XA CN113872720A (en) | 2021-10-11 | 2021-10-11 | Secret-related network time synchronization system and time service method |
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| CN209014929U (en) * | 2018-11-29 | 2019-06-21 | 中国科学院国家授时中心 | A kind of dual-time source network time server |
| CN110808803A (en) * | 2019-10-16 | 2020-02-18 | 北京航空航天大学 | High-reliability and high-performance reference clock system |
| CN213126054U (en) * | 2021-01-12 | 2021-05-04 | 北京云泰数通互联网科技有限公司 | Clock synchronization device and system |
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2021
- 2021-10-11 CN CN202111179915.XA patent/CN113872720A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100073228A1 (en) * | 2008-09-22 | 2010-03-25 | Vincent Maddock Smith | Method and apparatus for a global navigation satellite system receiver coupled to a host computer system |
| CN202455370U (en) * | 2012-02-24 | 2012-09-26 | 云南电网公司普洱供电局 | Intelligent transformer substation main/standby double-clock automatic switching time service system |
| CN105656590A (en) * | 2015-12-30 | 2016-06-08 | 天维尔信息科技股份有限公司 | Time synchronization method, device and system |
| CN109085615A (en) * | 2018-08-01 | 2018-12-25 | 桂林电子科技大学 | A kind of BPC big dipper multi-mode time service method and system |
| CN209014929U (en) * | 2018-11-29 | 2019-06-21 | 中国科学院国家授时中心 | A kind of dual-time source network time server |
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