CN108668183A - A kind of optical-fiber network synchronous detecting method and system - Google Patents
A kind of optical-fiber network synchronous detecting method and system Download PDFInfo
- Publication number
- CN108668183A CN108668183A CN201710189395.8A CN201710189395A CN108668183A CN 108668183 A CN108668183 A CN 108668183A CN 201710189395 A CN201710189395 A CN 201710189395A CN 108668183 A CN108668183 A CN 108668183A
- Authority
- CN
- China
- Prior art keywords
- signal
- supervisory channel
- optical
- processing unit
- optical supervisory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0793—Network aspects, e.g. central monitoring of transmission parameters
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Abstract
The application discloses a kind of optical-fiber network synchronous detecting method and system, solves the problems such as strange land synchronous reference benchmark is inconsistent.The test system includes clock interface unit, Optical Supervisory Channel processing unit, clock reference source, synchronism detection instrument；The test method includes the following steps：Frequency reference signal is generated with clock a reference source, with synchronism detection instrument generated time reference signal, and inputting local network element clock interface unit as external synchronization signal generates line synchronization signal, then is encapsulated into Optical Supervisory Channel signal and is transmitted to circuit network element；Circuit network element is set, line synchronization signal is transmitted until being transmitted to local Optical Supervisory Channel processing unit by circuit Optical Supervisory Channel processing unit；The local Optical Supervisory Channel processing unit of setting restores line synchronization signal from Optical Supervisory Channel signal, then restores external synchronization signal by clock interface unit, and synchronism detection instrument is inputted as measured signal.The application improves accuracy, field condition is avoided to limit, and reduces cost.
Description
Technical field
This application involves the communications field more particularly to the synchronous detecting methods and system of a kind of optical transfer network.
Background technology
In optical-fiber network, using the optical transport network (such as OTN/POTN) of Asynchronous operation mode although itself is not needed to
Frequency Synchronization and time synchronization are carried out, but frequency and time synchronizing signal must be carried as bearer network, is on the one hand needed
Signal is synchronized with other bearer networks to dock, and the time link tissue for synchronous net is on the other hand needed to provide support.
Optical network system Frequency Synchronization and time synchronization are now netted test and are played to performance verification, engineering opening, later maintenance
Vital effect.However now net test method is at present：On the one hand, source and egress are different
Computer room, needs to draw and connects different synchronous reference sources, although different synchronous reference source net synchronization capabilities is in same magnitude level,
Measurement error can be inevitably introduced to a certain extent；On the other hand, source and test reference are tested by computer room physical bit
It sets, GPS antenna installation environment, transmission device synchronizing signal draw the limitations such as narrow bars part, it is necessary to choose the website for meeting certain condition
It is tested, some representative synchronization links can not be tested due to a lack of condition.
Invention content
A kind of optical transfer network synchronous detecting method of the application proposition and system solve strange land in Network Synchronization test and synchronize ginseng
It examines that benchmark is inconsistent to lead to measurement error, and requires height to cause test difficult the source for test, destination node test condition
The technical issues of.
The embodiment of the present application provides a kind of optical-fiber network synchronous test system, and the optical-fiber network is comprising a local network element and extremely
A few circuit network element, the local network element include clock interface unit, local Optical Supervisory Channel processing unit；The line network
Member includes circuit Optical Supervisory Channel processing unit；The test system includes clock reference source, synchronism detection instrument, the clock
Interface unit, the local Optical Supervisory Channel processing unit, at least one circuit Optical Supervisory Channel processing unit；When described
Clock a reference source generates frequency reference signal and phase reference signal, is input to the synchronism detection instrument, is used as test reference and believes
Number；The clock interface unit is converted to line synchronization signal, is sent to the local light monitoring for receiving external synchronization signal
Channel processing unit；It is additionally operable to, from the local Optical Supervisory Channel processing unit receiving circuit synchronizing signal, restore described outer same
Signal is walked, the synchronism detection instrument is input to, is used as measured signal；The local Optical Supervisory Channel processing unit, being used for will
In the line synchronization signal assemble to Optical Supervisory Channel signal, it is additionally operable to from the Optical Supervisory Channel signal of reception described in recovery
Line synchronization signal；The circuit Optical Supervisory Channel processing unit, for transmitting the Optical Supervisory Channel signal；The light monitoring
Channel signal from the local Optical Supervisory Channel processing unit output, by least one circuit Optical Supervisory Channel processing unit,
It is looped back to local Optical Supervisory Channel processing unit again；The synchronism detection instrument, for generated time reference signal, to the survey
Examination reference signal and the measured signal are compared；The external synchronization signal, including the frequency reference signal and it is described when
Between reference signal.
The embodiment of the present application also proposes a kind of optical-fiber network synchronous detecting method, for described in the application any one embodiment
Optical-fiber network synchronous test system, includes the following steps：
Frequency reference signal and phase reference signal are generated using clock reference source, is input to the synchronism detection instrument,
As test reference signal；
Using synchronism detection instrument, according to the phase reference signal generated time reference signal, the frequency reference letter
Number and the timing reference signal collectively as the external synchronization signal, be input to the clock interface unit, it is same to generate circuit
Signal is walked, then is encapsulated into Optical Supervisory Channel signal by the local Optical Supervisory Channel processing unit, circuit network element is transmitted to；
Each circuit network element is set, by the circuit Optical Supervisory Channel processing unit to the line synchronization signal into
Row transmits, then is transmitted to local Optical Supervisory Channel processing unit or next circuit Optical Supervisory Channel processing unit；
The local Optical Supervisory Channel processing unit is set, restores the line synchronization letter from Optical Supervisory Channel signal
Number, then the external synchronization signal is restored by the clock interface unit, it is used as measured signal, is input to the synchrometer
Table；
Using the synchronism detection instrument, the test reference signal and the measured signal are compared.
Preferably, in herein described optical-fiber network synchronous detecting method and system, the clock interface unit includes first
Clock interface unit and second clock interface unit；The local Optical Supervisory Channel processing unit includes at the first Optical Supervisory Channel
Manage unit and the second Optical Supervisory Channel processing unit；The first clock interface unit is converted to for receiving external synchronization signal
Line synchronization signal；The first Optical Supervisory Channel processing unit is logical for monitoring the line synchronization signal assemble to light
In road signal；The second Optical Supervisory Channel processing unit, for restoring the circuit from the Optical Supervisory Channel signal of reception
Synchronizing signal；The second clock interface unit is used for receiving circuit synchronizing signal, restores the external synchronization signal.
Preferably, in herein described optical-fiber network synchronous detecting method and system, the optical-fiber network be optical transport network or
Grouping transmission optical-fiber network.
Preferably, in herein described optical-fiber network synchronous detecting method and system, the frequency reference signal be 2MHz or
2Mbps；The phase reference signal is 1pps, and the timing reference signal is 1pps+ToD.
Preferably, in herein described optical-fiber network synchronous detecting method and system, the line synchronization signal is for same
Step Ethernet, the synchronizing signal for meeting 1588 standards of IEEE.
Preferably, in herein described optical-fiber network synchronous detecting method and system, when the clock reference source is main reference
Clock equipment and/or local primary reference equipment.
Above-mentioned at least one technical solution that the embodiment of the present application uses can reach following advantageous effect：The present invention is directed to
In optical-fiber network, especially OTN/POTN systems, the method for synchronization based on Optical Supervisory Channel distributed treatment, it is proposed that novel synchronous
On the one hand loop testing method, technical solution of the present invention solve the problems, such as the measurement error that remote-site testing reference tape comes, improve
System testing accuracy；On the other hand the limitation for having broken away from test source and test reference point, can be according to actual needs in light
Any node of network system is tested, and not drawn narrow bars part by live satellite signal is limited, and is reduced testing cost, is reduced
O＆M risk.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is existing net synchronous routine test schematic diagram in OTN/POTN systems；
Fig. 2 is optical-fiber network synchronous test system embodiment schematic diagram of the present invention；
Fig. 3 is another embodiment of Synchronous Optical Network synchronous test system of the present invention；
Fig. 4 is optical-fiber network synchronous detecting method embodiment schematic diagram of the present invention.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, shall fall in the protection scope of this application.
The technology of the present invention key point is that in the optical-fiber network that distributed Optical Supervisory Channel is handled, especially OTN/POTN is set
It is standby upper, by the Optical Supervisory Channel processing unit and sync cap unit of twocouese, it can be completed in single site and meet IEEE
The system loopback test of the line synchronization signal of the synchronous ethernet (1588+syncE) of 1588 standards.The technology is suitable for
1588 and the OTN/POTN equipment of synchronous ether synchronous driving are carried out using distributed point-by-point processing mode on OSC boards, it is uncomfortable
For OSC+ master controls centralized processing or ESC modes.
The solution of the present invention selects source equipment as local network element first.In highly preferred embodiment of the present invention, source section
Point device includes the second Optical Supervisory Channel of increase on the basis of the first sync cap unit and the first Optical Supervisory Channel processing unit
Processing unit and second synchronizes the system loop testing method that order member realizes 1588+syncE；Believed synchronous using point-by-point mode
Number carry out local loopback test.
One aspect of the present invention eliminates the measurement error of the not homologous introducing of strange land clock reference, has on the other hand broken away from test
The bottleneck that live satellite receives or clock reference environment is limited carries out PTP (1588) or synchronous ether for OTN/POTN systems
(syncE) time link now nets test and provides flexible solution.
Present specification has used following abbreviation：1PPS --- pulse per second (PPS)；BC --- boundary clock；GPS --- the whole world
Positioning system；LPR --- local primary reference；OSC --- Optical Supervisory Channel；OTN --- optical transport network；POTN --- point
Group transmission optical-fiber network；PTP --- accurate time synchronization protocol；PRC --- primary reference clock；SyncE --- synchronous ethernet；
ToD --- the moment on the same day.
Below in conjunction with attached drawing, the technical solution that each embodiment of the application provides is described in detail.
Fig. 1 is existing net synchronous routine test schematic diagram in OTN/POTN systems.As shown in Figure 1, conventional OTN/POTN systems
As carried out time synchronization and Frequency Synchronization test using OSC distributed processing modes in system, source and egress are strange land node.
Source is usually deployed the time server traced to the source to satellite, and (or the available test instrumentation for connecing satellite antenna is as interim synchronization
Source), 2M frequency signals and 1pps+ToD time signals are injected into the Wireless Clock Interface Unit of OTN/POTN equipment, by Wireless Clock Interface Unit
Synchronizing signal is sent to OSC boards by backboard or jumper, after multistation is handled point by point, in the Wireless Clock Interface Unit of egress
Upper output 2M and 1pps+ToD synchronism detection signals have been traced to the source in access station to carrying out same pacing in the synchronism detection instrument of satellite
Examination.
Existing measuring technology deposits drawback both ways：One, strange land benchmark is not homologous, introduces measurement error, Wu Faxiu
Just.Although the frequency that the synchronous base of source and the test benchmark of egress should all reach China level-one reference clock 3E-12 is accurate
Degree is horizontal, but since the synchronous base of source and the test benchmark of egress are in remote room, since satellite receives star number amount, receipts star
The measurement error that the non-ideal factors such as position, satellite receiver process performance, gauge internal scaling down processing are brought is to be difficult to avoid that
, which can not be modified and be compensated by model, therefore influence whether the measuring accuracy of synchronization system test.
Two, test environment, test station limited resource are more, influence the selection of test addressing and representative synchronization link.It is same for the time
Pacing tries, and egress computer room must have GPS/ Big Dipper satellite signals and receive environment, and satellite antenna feeder is connect as test site can not draw,
Time synchronization test can not be then carried out, as live satellite antenna mushroom head is blocked by building or is received if by other air interferences
Satellite-signal is unstable, then can seriously affect test result；Frequency Synchronization is tested, otherwise egress computer room needs to have
GPS/ Big Dipper satellite signals reception environment or station domestic demand will dispose PRC or LPR level-one reference clocks equipment could be into line frequency
Synchronization system is tested.Therefore the test method is more demanding to computer room field condition, to be tested same particularly with typically needing
Walking link (G.8271.1HRM Class B 20 jump BC cascade networks scene to such as ITU-T), there are the objective problems of addressing difficulty.
Fig. 2 is optical-fiber network synchronous test system embodiment schematic diagram of the present invention.The embodiment of the present application provides a kind of optical-fiber network
Synchronous test system, the optical-fiber network include a local network element 10 and at least one circuit network element 20, the local network element packet
Unit containing clock interface 1, local Optical Supervisory Channel processing unit 2；The circuit network element includes that the processing of circuit Optical Supervisory Channel is single
Member 3.
The test system includes clock reference source 4, synchronism detection instrument 5, the clock interface unit 1, the local
Optical Supervisory Channel processing unit 2, at least one circuit Optical Supervisory Channel processing unit 3,.
The clock reference source 4 generates frequency reference signal (2M) and phase reference signal (1pps), is input to described same
Test instrumentation is walked, test reference signal is used as.
The clock interface unit is converted to line synchronization signal, is sent to the local for receiving external synchronization signal
Optical Supervisory Channel processing unit；It is additionally operable to, from the local Optical Supervisory Channel processing unit receiving circuit synchronizing signal, restore institute
External synchronization signal is stated, the synchronism detection instrument is input to, is used as measured signal.
The local Optical Supervisory Channel processing unit, is used for the line synchronization signal assemble to Optical Supervisory Channel signal
In, it is additionally operable to restore the line synchronization signal from the Optical Supervisory Channel signal of reception；The circuit Optical Supervisory Channel processing
Unit, for transmitting the Optical Supervisory Channel signal.
In each described circuit network element 20, circuit Optical Supervisory Channel processing unit 3 carries out the line synchronization signal
It transmits, is transmitted to local network element or next circuit network element；The Optical Supervisory Channel signal is from the local Optical Supervisory Channel
It manages unit output, by least one circuit Optical Supervisory Channel processing unit, then is looped back to local Optical Supervisory Channel processing unit.
The synchronism detection instrument, for generated time reference signal (1pps+ToD), to the test reference signal and
The measured signal is compared；The external synchronization signal, including the frequency reference signal and the timing reference signal.
Usually, the clock interface unit is the Wireless Clock Interface Unit of business machine；Optical Supervisory Channel processing unit is quotient
With the OSC boards of equipment.It is worth noting that if having the input and output of Frequency Synchronization and time synchronization letter on commercialization OSC boards
Number interface, then can also omit sync cap plate.
Fig. 3 is another embodiment schematic diagram of optical-fiber network synchronous test system of the present invention.Described in Fig. 2 on the basis of embodiment,
Preferably, in herein described optical-fiber network synchronous test system, the clock interface unit of the local network element includes the first clock
Interface unit 11 and second clock interface unit 12；Local Optical Supervisory Channel processing unit in the local network element includes first
Optical Supervisory Channel processing unit 21 and the second Optical Supervisory Channel processing unit 22；The first clock interface unit, for receiving
External synchronization signal is converted to line synchronization signal；The first Optical Supervisory Channel processing unit, for believing the line synchronization
It number is encapsulated into Optical Supervisory Channel signal；The second Optical Supervisory Channel processing unit, for believing from the Optical Supervisory Channel of reception
Restore the line synchronization signal in number；The second clock interface unit is used for receiving circuit synchronizing signal, restores described outer
Synchronizing signal.
For example, clock reference source is PRC and/or LPR, it is on the one hand the clock interface unit of the local network element of OTN/POTN
11 provide 2M reference frequency signals, on the one hand provide 2M and 1pps test references for synchronism detection instrument 5；
In business machine, the clock interface unit 11 is the local network element Wireless Clock Interface Unit of OTN/POTN, when reception
After the 1pps+ToD timing reference signals that the 2M frequency synchronization signals and synchronism detection instrument 5 of clock a reference source are sent out, into line interface
And rate conversion, line synchronization signal is sent to the first Optical Supervisory Channel processing unit 21 by backboard or external clock line.
Optical Supervisory Channel processing unit 21, for example, business machine OSC boards, by what is received from clock interface unit 11
After 1588+syncE line synchronizations signal assemble to osc light monitor channel signal, by the line synchronization signal in a manner of point-by-point
Carry out interoffice transmission；
Optical Supervisory Channel processing unit 22 is e.g. separately matched in the OTN/POTN equipment of source website (i.e. local network element)
One piece of OSC board recovers 1588+syncE line synchronization signals between slave station, and will restore in the Optical Supervisory Channel signal of loopback
The synchronizing signal sent to clock interface unit 12 by backboard or external clock line；
The line synchronization signal received is carried out rate and protocol conversion, exports 2M and 1pps+ by clock interface unit 12
ToD test signals give synchronism detection instrument；
Synchronism detection instrument 5：2M the and 1pps reference signals of clock reference source (PRC/LPR) are received, i.e., the described test ginseng
Signal is examined, Frequency Synchronization test is carried out to the 2M frequency reference signals that clock interface unit 12 exports, to clock interface unit 12
The 1pps+ToD timing reference signals of output carry out time synchronization test.
It should be noted that synchronism detection instrument does not need to receive GPS/ Big Dipper satellite signals in the system of the present invention,
If scene is without clock reference source device (PRC/LPR), when test instrumentation can send 2M frequency reference signals and 1pps+ToD simultaneously
Between reference signal directly input clock interface unit 11.
Fig. 4 is optical-fiber network synchronous detecting method embodiment schematic diagram of the present invention.The embodiment of the present application also proposes a kind of light net
Network synchronous detecting method includes the following steps for optical-fiber network synchronous test system described in the application any one embodiment：
Step 11 generates frequency reference signal and phase reference signal using clock reference source, is input to the same pacing
Instrument is tried, test reference signal is used as；
For example, after the output of exact p-value scene clock reference source is normal on clock webmaster, by the 2M frequencies in clock reference source
Rate reference signal and 1pps phase reference signals are exported to synchronism detection instrument as test reference signal.
Step 12, using synchronism detection instrument, according to the phase reference signal generated time reference signal, the frequency
Reference signal and the timing reference signal are input to the clock interface of the local network element collectively as the external synchronization signal
Unit generates line synchronization signal, then is encapsulated into light monitoring by the local Optical Supervisory Channel processing unit of the local network element
In channel signal, it is transmitted to circuit network element；
For example, by the 1pps+ToD timing reference signals of the 2M frequency reference signals in clock reference source and synchronism detection instrument
It injects to the clock interface unit of the local network element OTN/POTN equipment of test station；
In particular, when local network element includes the first clock interface unit, the first Optical Supervisory Channel processing unit, the frequency
Rate reference signal and the timing reference signal are collectively as the external synchronization signal, when being input to the first of the local network element
Clock interface unit generates line synchronization signal, then is encapsulated by the first Optical Supervisory Channel processing unit of the local network element
In Optical Supervisory Channel signal, it is transmitted to circuit network element.
Each circuit network element is arranged in step 13, passes through the circuit Optical Supervisory Channel processing unit pair of the circuit network element
The line synchronization signal is transmitted, then is transmitted to local network element or next circuit network element：Specifically, it is transmitted to local light
Monitor channel processing unit or next circuit Optical Supervisory Channel processing unit；
Transmission is synchronized for example, configuring the point-by-point processing modes of OSC in OTN/POTN transmission network management and carrying out 1588+syncE, really
It is normal to recognize network element tracking clock state.
Step 14, the setting local Optical Supervisory Channel processing unit, restore the circuit from Optical Supervisory Channel signal
Synchronizing signal, then the external synchronization signal is restored by the clock interface unit, it is used as measured signal, is input to the synchronization
Test instrumentation.
For example, in local network element using commercial OTN/POTN equipment, separately matches one piece of OSC board in equipment and clock connects
Oralia lands the 1588 of remote loopback and syncE synchronizing signals by OSC boards, and is carried out by Wireless Clock Interface Unit
Interface and protocol conversion export 2M and 1pps+ToD synchronism detection signals；
The external synchronization signal restored through the clock interface unit, including the frequency reference signal restored and recovery
Timing reference signal.
Step 15, using the synchronism detection instrument, the test reference signal and the measured signal are compared.
Specifically, the frequency local network element (such as OTN/POTN network elements) clock interface unit restored by the synchronism detection instrument
Reference signal (2M) carries out Frequency Synchronization test, i.e., connects the frequency reference signal that the clock reference source generates with the clock
The frequency reference signal that mouth unit restores is compared；The timing reference signal that local network element clock interface unit is restored
(1pps+ToD) carries out time synchronization test, i.e., connects the timing reference signal of synchronism detection instrument generation and the clock
The timing reference signal that mouth unit restores is compared；Or the phase reference signal and described for generating the clock reference source
The timing reference signal that clock interface unit restores is compared.
In particular, when local network element includes second clock interface unit, the second Optical Supervisory Channel processing unit, described
Second Optical Supervisory Channel processing unit of ground network element restores the line synchronization signal from the Optical Supervisory Channel signal, then leads to
It crosses the second clock interface unit recovery external synchronization signal and inputs the synchronism detection instrument as measured signal.It is logical
Cross the frequency reference signal that synchronism detection instrument restores local network element (such as OTN/POTN network elements) second clock interface unit
(2M) carries out Frequency Synchronization test, and time synchronization test is carried out to the timing reference signal (1pps+ToD) that local network element restores.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Including so that process, method, commodity or equipment including a series of elements include not only those elements, but also wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that wanted including described
There is also other identical elements in the process of element, method, commodity or equipment.
Above is only an example of the present application, it is not intended to limit this application.For those skilled in the art
For, the application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (8)
1. a kind of optical-fiber network synchronous test system, the optical-fiber network includes a local network element and at least one circuit network element, institute
It includes clock interface unit, local Optical Supervisory Channel processing unit to state local network element；The circuit network element is monitored comprising circuit light
Channel processing unit；It is characterized in that,
The test system includes that clock reference source, synchronism detection instrument, the clock interface unit, the local light monitoring are logical
Road processing unit, at least one circuit Optical Supervisory Channel processing unit；
The clock reference source generates frequency reference signal and phase reference signal, is input to the synchronism detection instrument, is used as
Test reference signal；
The clock interface unit is converted to line synchronization signal, is sent to the local light prison for receiving external synchronization signal
Control channel processing unit；
It is additionally operable to, from the local Optical Supervisory Channel processing unit receiving circuit synchronizing signal, restore the external synchronization signal, it is defeated
Enter to the synchronism detection instrument, is used as measured signal；
The local Optical Supervisory Channel processing unit, for by the line synchronization signal assemble to Optical Supervisory Channel signal,
It is additionally operable to restore the line synchronization signal from the Optical Supervisory Channel signal of reception；
The circuit Optical Supervisory Channel processing unit, for transmitting the Optical Supervisory Channel signal；The Optical Supervisory Channel signal
It exports, by least one circuit Optical Supervisory Channel processing unit, then is looped back to from the local Optical Supervisory Channel processing unit
Local Optical Supervisory Channel processing unit；
The synchronism detection instrument, for generated time reference signal, to the test reference signal and the measured signal into
Row compares；
The external synchronization signal, including the frequency reference signal and the timing reference signal.
2. optical-fiber network synchronous test system as described in claim 1, which is characterized in that the frequency reference signal be 2MHz or
2Mbps。
3. optical-fiber network synchronous test system as described in claim 1, which is characterized in that the phase reference signal is 1pps, institute
It is 1pps+ToD to state timing reference signal.
4. optical-fiber network synchronous test system as described in claim 1, which is characterized in that the optical-fiber network is optical transport network or divides
Group transmission optical-fiber network.
5. optical-fiber network synchronous test system as described in claim 1, which is characterized in that the line synchronization signal is for synchronizing
Ethernet meets the synchronizing signal of 1588 standards of IEEE.
6. optical-fiber network synchronous test system as described in claim 1, which is characterized in that the clock reference source is primary reference clock
Equipment and/or local primary reference equipment.
7. optical-fiber network synchronous test system as described in claim 1, which is characterized in that
The clock interface unit includes the first clock interface unit and second clock interface unit；
The local Optical Supervisory Channel processing unit includes that the first Optical Supervisory Channel processing unit and the second Optical Supervisory Channel are handled
Unit；
The first clock interface unit is converted to line synchronization signal for receiving external synchronization signal；
The first Optical Supervisory Channel processing unit, being used for will be in the line synchronization signal assemble to Optical Supervisory Channel signal；
The second Optical Supervisory Channel processing unit, for restoring the line synchronization letter from the Optical Supervisory Channel signal of reception
Number；
The second clock interface unit is used for receiving circuit synchronizing signal, restores the external synchronization signal.
8. a kind of optical-fiber network synchronous detecting method is used for optical-fiber network synchronous test system described in claim 1~7 any one,
It is characterized by comprising the following steps
Frequency reference signal and phase reference signal are generated using clock reference source, the synchronism detection instrument is input to, is used as
Test reference signal；
Using synchronism detection instrument, according to the phase reference signal generated time reference signal, the frequency reference signal and
The timing reference signal is input to the clock interface unit collectively as the external synchronization signal, generates line synchronization letter
Number, then be encapsulated into Optical Supervisory Channel signal by the local Optical Supervisory Channel processing unit, it is transmitted to circuit network element；
Each circuit network element is set, the line synchronization signal is passed by the circuit Optical Supervisory Channel processing unit
It passs, then is transmitted to local Optical Supervisory Channel processing unit or next circuit Optical Supervisory Channel processing unit；
The local Optical Supervisory Channel processing unit is set, restores the line synchronization signal from Optical Supervisory Channel signal, then
Restore the external synchronization signal by the clock interface unit, is used as measured signal, is input to the synchronism detection instrument；
Using the synchronism detection instrument, the test reference signal and the measured signal are compared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710189395.8A CN108668183B (en) | 2017-03-27 | 2017-03-27 | Optical network synchronization test method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710189395.8A CN108668183B (en) | 2017-03-27 | 2017-03-27 | Optical network synchronization test method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108668183A true CN108668183A (en) | 2018-10-16 |
| CN108668183B CN108668183B (en) | 2020-09-18 |
Family
ID=63786149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710189395.8A Active CN108668183B (en) | 2017-03-27 | 2017-03-27 | Optical network synchronization test method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108668183B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394025A (en) * | 2001-07-02 | 2003-01-29 | 深圳市中兴通讯股份有限公司上海第二研究所 | Loopback protector for light monitor channel |
| CN1728604A (en) * | 2004-07-26 | 2006-02-01 | 华为技术有限公司 | Method and system of information transmission equipment |
| CN101877800A (en) * | 2009-12-03 | 2010-11-03 | 上海交通大学 | Test method of difference time delay of optical network |
| US20160140286A1 (en) * | 2014-11-14 | 2016-05-19 | Xpliant, Inc. | Testbench builder, system, device and method with phase synchronization |
-
2017
- 2017-03-27 CN CN201710189395.8A patent/CN108668183B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394025A (en) * | 2001-07-02 | 2003-01-29 | 深圳市中兴通讯股份有限公司上海第二研究所 | Loopback protector for light monitor channel |
| CN1728604A (en) * | 2004-07-26 | 2006-02-01 | 华为技术有限公司 | Method and system of information transmission equipment |
| CN101877800A (en) * | 2009-12-03 | 2010-11-03 | 上海交通大学 | Test method of difference time delay of optical network |
| US20160140286A1 (en) * | 2014-11-14 | 2016-05-19 | Xpliant, Inc. | Testbench builder, system, device and method with phase synchronization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108668183B (en) | 2020-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102394715B (en) | Clock synchronizing method and device | |
| CN110784275B (en) | Time synchronization deviation adjusting method, device, terminal and access stratum equipment | |
| CN101425865B (en) | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity | |
| CN105262555B (en) | Time synchronization method, programmable logic device, single board and network element | |
| CN102932083B (en) | A kind of method and apparatus during microwave synchronization pair | |
| CN102638324B (en) | Method and device for realizing precise time synchronization | |
| CN102082697A (en) | Communication path asymmetric time delay measuring method, device and system | |
| CN108599888A (en) | A kind of distributed network clock synchronizing system | |
| CN102769908A (en) | Time synchronizer and time synchronization method applied to protective test equipment of power system | |
| CN103188066A (en) | Reference clock signal processing method and device | |
| CN105634641B (en) | Based on architecture for exchanging can cascade network communication accurate timing system and method | |
| CN101888695A (en) | Time service method, system and device of base station | |
| CN102404105A (en) | Device and method for realizing time synchronization on Ethernet switch | |
| CN105281885A (en) | Time synchronization method and device used for network equipment and time synchronization server | |
| CN103166792A (en) | Line asymmetrical compensation method, equipment and system | |
| US9453920B1 (en) | Scalable multi-source GPS signal distribution network | |
| CN108134645A (en) | Radar signal synchronization system | |
| CN107809295A (en) | A kind of cross-platform time synchronism apparatus and method | |
| CN102916758A (en) | Ethernet time synchronization device and network equipment | |
| CN207884639U (en) | A kind of network node, temporal noise transmission characteristic measuring device and synchronous communication network | |
| CN102201906A (en) | Clock signal processing method and equipment | |
| CN103580767B (en) | A kind of wireless communication networks clock synchronizing method, device and network element | |
| CN106254182B (en) | A kind of time synchronism apparatus of IP network tester | |
| CN105450320A (en) | Whole-course us-level-precision wireless ethernet synchronization apparatus of intelligent transformer station and method thereof | |
| US7394770B2 (en) | Use of synchronized clocks to provide input and output time stamps for performance measurement of traffic within a communications system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |