CN104320238A - Seafloor observation network time synchronization method under large traffic background - Google Patents
Seafloor observation network time synchronization method under large traffic background Download PDFInfo
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- CN104320238A CN104320238A CN201410558451.7A CN201410558451A CN104320238A CN 104320238 A CN104320238 A CN 104320238A CN 201410558451 A CN201410558451 A CN 201410558451A CN 104320238 A CN104320238 A CN 104320238A
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Abstract
The invention discloses a seafloor observation network time synchronization method under a large traffic background. The time synchronization method is based on IEEE1588V2 protocol and T-MPLS configuration. A shore-based station PTP master clock receives global position system (GPS) or Beidou satellite signals to be synchronized with a local clock of the shore-based station PTP master clock and serves as a time synchronization system clock source to provide time service for a seafloor observation network. The shore-based station PTP master clock is connected with an underwater PTP slave clock through network transmission devices such as a shore-based station PTN, an underwater main junction box PTN and an underwater auxiliary junction box exchanger to be synchronized with time of the underwater PTP slave clock through interaction of PTP time synchronization messages, and the PTP slave clock provides multi-mode time signal time services for the observation network. Virtual private channels of the PTP time synchronization messages and data packets are arranged respectively through T-MPLS, thereby, timely response transmission of the PTP time synchronization messages can be achieved, and the time synchronization accuracy of the seafloor observation network can be greatly improved.
Description
Technical field
The present invention relates to the method for synchronizing time under a kind of submarine observation network large discharge background, especially a kind of based on IEEE 1588 V2 agreement and T-MPLS configuration submarine observation network large discharge background under method for synchronizing time.
Background technology
Along with the development of marine science and technology, traditional marine exploration method more and more can not meet human wants.For a long time, wide region, continuous print real-time detecting method-submarine observation network arise at the historic moment.As the observation platform that human detection earth system is new, seabed observation network can connect hundreds and thousands of submarine science instruments miscellaneous, to scientific research of seas, the Monitoring and prevention of the geological disaster such as earthquake, tsunami, more and more important effect is played in the observation of submarine hydrothermal solution phenomenon, the long-term follow of Global climate change and seabed resources exploration etc.All these scientific instrument and bank based system must have a unified time reference, and can precise synchronization in time, and the various science data collected only in this way just can be made to have actual analysis meaning.
Owing to being subject to the obstruct of seawater, each scientific instrument be connected on seabed observation network cannot carry out direct time service by satellite system.Use the IEEE 1588V2 agreement based on wired ethernet, time synchronized service can be provided for submarine science instrument, and precision reaches delicate rank when to realize under without flow or low discharge situation pair, but along with the continuous increase of communication data amount, under normal circumstances on time precision also can be affected largely.
Summary of the invention
The object of this invention is to provide the method for synchronizing time under a kind of submarine observation network large discharge background, to realize other exact time synchronization of the nanosecond to seabed observation network under large discharge communication background.
For achieving the above object, the technical solution that the present invention intends adopting is:
Method for synchronizing time under submarine observation network large discharge background, comprises the following steps:
1) PTP master clock in bank base station receives GPS or Big Dipper satellite signal by antenna, makes the local clock of bank base station PTP master clock and UTC time error scope within 100ns;
2) be connected with bank base data management system and bank base station PTP master clock respectively by 100,000,000 netting twines by bank base station PTN, bank base station PTN is connected by kilomega optic fiber and the master under water box PTN that plugs into; To be connected from clock and N number of submarine science instrument by plug into master under water respectively box PTN, under water PTP of 100,000,000 netting twines by secondary box switch of plugging under water, PTP will under water be connected with N number of submarine science instrument from the time synchronizing signal output of clock, N >=1;
3) 100-M network Ethernet of bank base station PTN, under water master are plugged into box PTN 100-M network Ethernet and under water secondary 100-M network Ethernet of plugging on box switch by T-MPLS configuration be divided into two Ethernet virtual special local area networks, wherein, Ethernet virtual special local area network be comprise bank base station data management system, bank base station PTN, under water master plug into box PTN, the data packet transmission designated lane of secondary plug into box switch and submarine science instrument under water; Ethernet virtual special local area network be comprise GPS or big-dipper satellite, bank base station PTP master clock, bank base station PTN, under water master plug into box PTN, under water secondary plug into box switch and under water PTP from the PTP time synchronized message transmissions designated lane of clock, between two Ethernet virtual special local area networks, do not carry out communication.
In the present invention, described bank base station PTN, under water master plug into box PTN and under water secondary box switch of plugging into are all the web-transporting devices supporting IEEE 1588 V2 agreement.
In the present invention, described submarine science instrument is the equipment of the real-time online observation of access seabed observation network and data acquisition, such as submarine seismograph, deep sea camera, hydrophone etc.
In the present invention, described bank base station PTP master clock refers to and carries out time service by GPS or big-dipper satellite, supports IEEE 1588 V2 agreement and time server under being operated in Master pattern.As the time source of seabed observation network clock synchronization system; PTP refers to from clock the time server be operated in Slave pattern adopting IEEE 1588 V2 agreement and bank base station PTP master clock to carry out time synchronized under water; PTP time synchronized message is by the time synchronized message signals of IEEE 1588 V2 protocol definition.
In the present invention, the bank base station PTP master clock used can be the TimeCenter M612 that German Meinberg provides, built-in high-quality constant-temperature crystal oscillator (HQ-OCXO), when locking GPS or Big Dipper satellite signal, the precision of following the tracks of UTC is better than 100ns, and frequency stability is better than 1 × 10
-12.
The invention has the beneficial effects as follows: in the method for synchronizing time under submarine observation network large discharge background of the present invention, by the T-MPLS configuration on web-transporting device in systems in which, divide PTP time synchronized message and packet two Ethernet virtual transmission designated lanes respectively, the transmission of PTP time synchronized message and packet is not interfere with each other, the timing tracking accuracy realizing the seabed observation network under the large discharge background produced in data packet transmission rises to hundreds of nanosecond by several microsecond, meets the precise synchronization requirement of submarine science instrument.Avoid the split-second precision because of scientific instrument to require and the extra construction cost of the clock synchronization system passage produced, greatly reduce construction and the maintenance cost of seabed observation network clock synchronization system, and the precise synchronization requirement of instrument can be met.
Accompanying drawing explanation
Fig. 1 is the clock synchronization system schematic diagram under submarine observation network large discharge background.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to Fig. 1, the method for synchronizing time under submarine observation network large discharge background, comprises the following steps:
1) bank base station PTP master clock 1 receives GPS or Big Dipper satellite signal by antenna, makes the local clock of bank base station PTP master clock and UTC time error scope within 100ns; Bank base station PTP master clock refers to the time server under can receive GPS or Big Dipper satellite signal carries out the IEEE 1588 V2 agreement Master pattern that is operated in of time synchronized own, and itself is as the time source of seabed observation network clock synchronization system;
2) be connected with bank base data management system 2 and bank base station PTP master clock 1 respectively by 100,000,000 netting twines by bank base station PTN 3, bank base station PTN 3 is connected by kilomega optic fiber and the master under water box PTN 4 that plugs into; To be connected from clock 6 and N number of submarine science instrument 7 by plug into master under water respectively box PTN 4, under water PTP of 100,000,000 netting twines by secondary box switch 5 of plugging under water, PTP is under water connected from the time synchronizing signal output of clock 6 with N number of submarine science instrument 7, N >=1;
Said bank base station PTN 3, under water master plug into box PTN 4 and under water secondary box switch 5 of plugging into are all the web-transporting devices supporting IEEE 1588 V2 agreement.
3) 100-M network Ethernet, the under water master of bank base station PTN 3 are plugged into box PTN 4 100-M network Ethernet and under water secondary 100-M network Ethernet of plugging on box switch 5 by T-MPLS configuration be divided into two Ethernet virtual special local area networks A, B, wherein, Ethernet virtual special local area network A be comprise bank base station data management system 2, bank base station PTN 3, under water master plug into box PTN 4, the data packet transmission designated lane of secondary plug into box switch 5 and submarine science instrument 7 under water; Ethernet virtual special local area network B be comprise GPS or big-dipper satellite, bank base station PTP master clock 1, bank base station PTN 3, under water master plug into box PTN 4, under water secondary plug into box switch 5 and under water PTP from the PTP time synchronized message transmissions designated lane of clock 6.Communication is not carried out between two Ethernet virtual special local area networks A, B.
Above-mentioned Ethernet virtual special local area network A is as the designated lane of packet between transmission bank base station data management system 2 and submarine science instrument 7, Ethernet virtual special local area network B as bank base station PTP master clock 1 and under water PTP from the PTP time synchronized message transmissions designated lane between clock 6, wherein bank base station PTN 3, the under water master data-interface that box PTN 4, under water secondary box switch 5 of plugging into adhere to two Ethernet virtual special local area networks separately of plugging into is separate, between two Ethernet virtual special local area networks, do not carry out communication.
During work, bank base station PTP master clock receives GPS or Big Dipper satellite signal, its temporal is synchronized to the UTC time, and the clock source using self as submarine observation network clock synchronization system, mutual by PTP time synchronized message, PTP is under water time-synchronized to bank base station PTP master clock from clock, and with PTP is from clock for N number of submarine science instrument provides time service service, time service mode there is PPS, DCLS, 10Mhz and E1 clock sync signal etc. under water.PTP time synchronized message is by the time synchronized message signals of IEEE 1588 V2 protocol definition.
Bank base station data management system and submarine science instrument, by web-transporting device, carry out uploading and the transmission of control command of the common image data of large discharge; Wherein bank base data management system manages the data that whole seabed observation network scientific instrument collect, file and stores.
Claims (5)
1. the method for synchronizing time under submarine observation network large discharge background, is characterized in that, comprise the following steps:
1) bank base station PTP master clock (1) receives GPS or Big Dipper satellite signal by antenna, makes the local clock of bank base station PTP master clock and UTC time error scope within 100ns;
2) by bank base station PTN(3) be connected with bank base data management system (2) and bank base station PTP master clock (1) respectively by 100,000,000 netting twines, bank base station PTN(3) to be plugged into box PTN(4 by kilomega optic fiber and master under water) be connected; Will under water secondary box switch (5) of plugging into be plugged into master under water respectively box PTN(4 by 100,000,000 netting twines), under water PTP be connected from clock (6) and N number of submarine science instrument (7), to be connected from the time synchronizing signal output of clock (6) with N number of submarine science instrument (7) by PTP under water, N >=1;
3) by bank base station PTN(3) 100-M network Ethernet, under water master to plug into box PTN(4) 100-M network Ethernet and under water secondary 100-M network Ethernet of plugging on box switch (5) be divided into two Ethernet virtual special local area networks (A, B) by T-MPLS configuration, wherein, Ethernet virtual special local area network (A) be comprise bank base station data management system (2), box PTN (4) is plugged in bank base station PTN (3), under water master, the data packet transmission designated lane of secondary plug into box switch (5) and submarine science instrument (7) under water; Ethernet virtual special local area network (B) be comprise GPS or big-dipper satellite, box PTN (4) is plugged in bank base station PTP master clock (1), bank base station PTN (3), under water master, under water secondary plug into box switch (5) and under water PTP from the PTP time synchronized message transmissions designated lane of clock (6), between two Ethernet virtual special local area networks (A, B), do not carry out communication.
2. the method for synchronizing time under submarine observation network large discharge background according to claim 1, it is characterized in that described bank base station PTP master clock (1) refers to and carry out time service by GPS or big-dipper satellite, support IEEE 1588 V2 agreement and time server under being operated in Master pattern.
3. the method for synchronizing time under submarine observation network large discharge background according to claim 1, is characterized in that described PTP under water refers to from clock (6) time server be operated in Slave pattern adopting IEEE 1588 V2 agreement and bank base station PTP master clock (1) to carry out time synchronized.
4. the method for synchronizing time under submarine observation network large discharge background according to claim 1, is characterized in that described bank base station PTN(3), under water master to plug into box PTN(4) and under water secondary box switch (5) of plugging into are all the web-transporting devices supporting IEEE 1588 V2 agreement.
5. method for synchronizing time under submarine observation network large discharge background according to claim 1, is characterized in that described submarine science instrument (7) is the instrument and equipment of the real-time online observation of access seabed observation network and data acquisition.
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Cited By (13)
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| CN105450491A (en) * | 2016-01-04 | 2016-03-30 | 北京北方烽火科技有限公司 | Time synchronization hardware architecture based on 1588 protocol, and time synchronization method |
| CN105471540A (en) * | 2015-12-16 | 2016-04-06 | 大连尚能科技发展有限公司 | Beidou GPS clock synchronization system based on wind power converter |
| CN106027188A (en) * | 2016-05-12 | 2016-10-12 | 哈尔滨工程大学 | UUV distributed control system time alignment method for compensating underwater acoustic communication time delay |
| CN106131437A (en) * | 2016-08-25 | 2016-11-16 | 武汉烽火众智数字技术有限责任公司 | A kind of Multi net voting video camera method for synchronizing time and system |
| WO2017000480A1 (en) * | 2015-07-01 | 2017-01-05 | 中兴通讯股份有限公司 | Time synchronization method, server and system, and storage medium |
| CN106576038A (en) * | 2015-07-08 | 2017-04-19 | 三菱电机株式会社 | Network system, time master station, and time slave station |
| CN106877964A (en) * | 2017-01-10 | 2017-06-20 | 中国科学院上海光学精密机械研究所 | High-precision optical fiber time frequency signal synchronizing network |
| CN107462921A (en) * | 2017-04-05 | 2017-12-12 | 中国科学院地质与地球物理研究所 | A kind of docking system and data extraction method based on combined type sea bottom earthquake-capturing node |
| CN109655917A (en) * | 2019-01-03 | 2019-04-19 | 中国科学技术大学 | A kind of long-range data synchronous for ocean seismic exploration haulage cable |
| CN110138864A (en) * | 2019-05-16 | 2019-08-16 | 上海亨通海洋装备有限公司 | A kind of submarine observation network communication system |
| CN110284872A (en) * | 2019-06-10 | 2019-09-27 | 中国石油大学(北京) | The virtual flow rate calculation method and system of the underwater acquisition system of offshore gas field group |
| CN112346102A (en) * | 2020-10-23 | 2021-02-09 | 中国科学院声学研究所东海研究站 | Underwater acoustic positioning navigation time service system |
| CN112952434A (en) * | 2021-02-01 | 2021-06-11 | 舟山美通信息技术有限责任公司 | Underwater scientific instrument socket assembly and application thereof |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017000480A1 (en) * | 2015-07-01 | 2017-01-05 | 中兴通讯股份有限公司 | Time synchronization method, server and system, and storage medium |
| CN106576038A (en) * | 2015-07-08 | 2017-04-19 | 三菱电机株式会社 | Network system, time master station, and time slave station |
| CN106576038B (en) * | 2015-07-08 | 2018-09-21 | 三菱电机株式会社 | Network system, time home site and time slave site |
| CN105471540A (en) * | 2015-12-16 | 2016-04-06 | 大连尚能科技发展有限公司 | Beidou GPS clock synchronization system based on wind power converter |
| CN105450491A (en) * | 2016-01-04 | 2016-03-30 | 北京北方烽火科技有限公司 | Time synchronization hardware architecture based on 1588 protocol, and time synchronization method |
| CN105450491B (en) * | 2016-01-04 | 2019-07-09 | 武汉虹信通信技术有限责任公司 | A kind of time synchronization hardware structure and method for synchronizing time based on 1588 agreements |
| CN106027188A (en) * | 2016-05-12 | 2016-10-12 | 哈尔滨工程大学 | UUV distributed control system time alignment method for compensating underwater acoustic communication time delay |
| CN106131437A (en) * | 2016-08-25 | 2016-11-16 | 武汉烽火众智数字技术有限责任公司 | A kind of Multi net voting video camera method for synchronizing time and system |
| CN106877964B (en) * | 2017-01-10 | 2018-07-13 | 中国科学院上海光学精密机械研究所 | High-precision optical fiber time frequency signal synchronizing network |
| CN106877964A (en) * | 2017-01-10 | 2017-06-20 | 中国科学院上海光学精密机械研究所 | High-precision optical fiber time frequency signal synchronizing network |
| CN107462921A (en) * | 2017-04-05 | 2017-12-12 | 中国科学院地质与地球物理研究所 | A kind of docking system and data extraction method based on combined type sea bottom earthquake-capturing node |
| CN109655917A (en) * | 2019-01-03 | 2019-04-19 | 中国科学技术大学 | A kind of long-range data synchronous for ocean seismic exploration haulage cable |
| CN109655917B (en) * | 2019-01-03 | 2020-05-12 | 中国科学技术大学 | Long-distance data synchronous acquisition system for marine seismic exploration towrope |
| CN110138864A (en) * | 2019-05-16 | 2019-08-16 | 上海亨通海洋装备有限公司 | A kind of submarine observation network communication system |
| CN110284872A (en) * | 2019-06-10 | 2019-09-27 | 中国石油大学(北京) | The virtual flow rate calculation method and system of the underwater acquisition system of offshore gas field group |
| CN112346102A (en) * | 2020-10-23 | 2021-02-09 | 中国科学院声学研究所东海研究站 | Underwater acoustic positioning navigation time service system |
| CN112952434A (en) * | 2021-02-01 | 2021-06-11 | 舟山美通信息技术有限责任公司 | Underwater scientific instrument socket assembly and application thereof |
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