CN106817159A - A kind of passive wavelength-division movement forward pass network system - Google Patents
A kind of passive wavelength-division movement forward pass network system Download PDFInfo
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- CN106817159A CN106817159A CN201710061350.2A CN201710061350A CN106817159A CN 106817159 A CN106817159 A CN 106817159A CN 201710061350 A CN201710061350 A CN 201710061350A CN 106817159 A CN106817159 A CN 106817159A
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- optical fiber
- wavelength
- trunk optical
- distal end
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- 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
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
Abstract
The present invention provides a kind of passive wavelength-division movement forward pass network system, it is characterised in that including local side, distal end and trunk optical fiber, also include：First supply unit, for detection light to be transported into the trunk optical fiber in one end of the trunk optical fiber；Second supply unit, detection light is transferred to each branch road of the distal end for the other end in the trunk optical fiber from the trunk optical fiber；Reflector, is arranged on the end of each branch road of distal end, for reflecting detection light.Detection light is synthesized to by trunk optical fiber by the first supply unit, detection light is transferred to each branch road of distal end from trunk optical fiber in distal end by the second supply unit, whether last reflected device so just realizes faulty with each branch road of detection light detection trunk optical fiber and distal end detection light backtracking.The present invention is small to the change of network, and increased element is few, has the advantages that simple to operate, low cost.
Description
Technical field
The present invention relates to passive wavelength-division movement forward pass network field, more particularly to a kind of passive wavelength-division movement forward pass network system
System.
Background technology
With the quick popularization of intelligent terminal and developing rapidly for mobile Internet, mobile service is exponentially increased, operation
The mobile network of business is faced with the pressure of bigger transmission data service.C-RAN(Cloud/Centralized Radio
Access Network, centralization Radio Access Network) important trend as wireless forward pass network Development.
The forward pass scheme of passive wavelength-division, is that multiple signals are passed through into CWDM/DWDM (Coarse Wavelength
Division Multiplexer, Coarse Wave Division Multiplexer；Dense Wavelength Division Multiplexer are intensive
Wavelength division multiplexer) after combining again by Optical Fiber Transmission, so as to carry out dilatation to mobile network under limited fiber resource.The party
Case uses passive transmission equipment, with without power supply, extra active equipment and propagation delay time is not introduced, and to miscellaneous service and biography
The advantage of defeated transparent rate.
In the installation and operation of C-RAN forward pass networks, how comprehensively diagnostic network failure is particularly important.Mainly
Failure cause include：RRU (Radio Remote Unit, Remote Radio Unit) power supply power failure, Transmission Fibers interrupt,
Failure, transmission jitter delay failure, RRU wireless signals are disturbed RRU device in itself.
OTDR (Optical Time Domain Reflectometer, optical time domain reflectometer) is one kind for detecting net
The instrument of optical fiber link failure in network.Network is monitored using OTDR, the source of failure can be told in optical fiber link also
It is transmission signal or equipment.But in the forward pass scheme of passive wavelength-division, due to wavelength division component after each branch road can only transmit spy
Standing wave is long, and conventional U wave band (Ultralong wavelength band, wavelength is the optical band of 1625-1675nm) OTDR sets
The standby link circuit condition for being difficult to detect the branch road after wavelength division component.
The content of the invention
The invention aims to be easy to diagnose the network failure in passive wavelength-division movement forward pass network, a kind of nothing is proposed
Source wavelength-division movement forward pass network system.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of passive wavelength-division movement forward pass network system, it is characterised in that including local side, distal end and trunk optical fiber, also wrap
Include detector, the first WDM device, the second WDM device, optical transport unit, reflector；The detector and described
Light path can be formed between first WDM device, one end of the trunk optical fiber is connected with first WDM device,
The other end of the trunk optical fiber is connected with second WDM device, and the optical transport unit can be by detection light from described
The output end of the second WDM device is sent to each branch road of the distal end, and the reflector is arranged on each of the distal end
The end of individual branch road.
Some preferred embodiment in, also including two-stage switch and testing equipment, the two-stage switch includes
Light extractor, first order light shifter, wavelength division multiplexer and second level light shifter, the light extractor are arranged on the main line
On optical fiber, the first order light shifter receives the light of the light extractor output, and the wavelength division multiplexer is in the first order
Transmission light between light shifter and the second level light shifter, the testing equipment receives the second level light shifter output
Light.
In further preferred embodiment, also including the second shunt or third level light shifter, the wavelength-division is answered
The light that the first order light shifter is exported is received by second shunt or the third level light shifter with device, it is described
Second level light shifter receives the light of the second shunt output or the light of third level light shifter output.
In further preferred embodiment, the wavelength division multiplexer Coarse Wave Division Multiplexer and the thick wavelength-division is received
The dense wave division multiplexer of the light of multiplexer output replaces, and the first order light shifter is by light output to the CWDM
Device, the second level light shifter receives the light from the dense wave division multiplexer outgoing.
In further preferred embodiment, the quantity of the two-stage switch is two or more；One two-stage
Switch gathers the upward signal of the trunk optical fiber, and a two-stage switch gathers the descending letter of the trunk optical fiber
Number；Or a half signal for the two-stage switch collection trunk optical fiber, a two-stage switch collection institute
State second half signal of trunk optical fiber.
In further preferred embodiment, also including at least one terminal, the terminal and the two-stage switch
And/or the testing equipment is connected, the terminal can send alarm signal.
Some preferred embodiment in, first WDM device be provided with detection optical channel local side wavelength-division
Multiplexer, or by being not provided with detecting that the local side wavelength division multiplexer and the first add-drop multiplexer of optical channel are constituted；Second ripple
Multiplexer is divided to be the distal end wavelength division multiplexer for being provided with detection optical channel, or by being not provided with detecting that the distal end wavelength-division of optical channel is answered
Constituted with device and the second add-drop multiplexer；The optical transport unit includes the first shunt and the 3rd add-drop multiplexer, described the
One shunt can extract light between second WDM device and the 3rd add-drop multiplexer, and described 3rd point is inserted multiple
It is arranged on the branch road of the distal end with device.
In further preferred embodiment, the light travels for also being sent including the 3rd shunt, the detector
To after the 3rd shunt, it is transferred on the detection optical channel of local side wavelength division multiplexer and/or described first point is inserted multiple
With on device, the quantity of the detector is at least one, and the quantity of the 3rd shunt is at least one.
On the other hand, the present invention also provides following technical scheme：
A kind of passive wavelength-division movement forward pass network system, it is characterised in that including local side, distal end and trunk optical fiber, also wrap
Include：First supply unit, for detection light to be transported into the trunk optical fiber in one end of the trunk optical fiber；Second conveying is single
Unit, detection light is transferred to each branch road of the distal end for the other end in the trunk optical fiber from the trunk optical fiber；
Reflector, is arranged on the end of each branch road of distal end, for reflecting detection light；It is delivered to respectively through main line by making detection light
It is whether faulty to detect network through backtracking behind the end of individual branch road.
Some preferred embodiment in, also including the 3rd supply unit and testing equipment, the 3rd supply unit
For the flashlight of the flashlight of different trunk optical fibers and/or different wave length to be transferred into the testing equipment, the detection sets
It is ready for use on whether detection signal light has exception；All of flashlight is to detect net in by extracting network from the trunk optical fiber
Whether network is faulty.
Compared with prior art, beneficial effects of the present invention have：
Detection light is synthesized to trunk optical fiber by the present invention by the first supply unit, will be examined in distal end by the second supply unit
Light-metering is transferred to each branch road of distal end from trunk optical fiber, and last reflected device so just realizes detection light backtracking
Whether each branch road with detection light detection trunk optical fiber and distal end is faulty.The present invention is small to the change of network, increased
Element is few, has the advantages that simple to operate, low cost.
In a preferred embodiment, the present invention also has the advantages that：
Further, the 3rd supply unit can be by the flashlight of different trunk optical fibers and/or the flashlight of different wave length
Be transported to testing equipment, so as to the various flashlights in network are detected, with the first supply unit, the second supply unit and
Reflector is used in combination, can be with the failure of complete detection network.
Brief description of the drawings
Fig. 1 is the structural representation of the first embodiment of the present invention；
Fig. 2 is the structural representation of the second embodiment of the present invention；
Fig. 3 is the structural representation of the third embodiment of the present invention；
Fig. 4 is the structural representation of the fourth embodiment of the present invention；
Fig. 5 is the structural representation of the fifth embodiment of the present invention；
Fig. 6 is the structural representation of the sixth embodiment of the present invention；
Fig. 7 is the structural representation of the seventh embodiment of the present invention；
Fig. 8 is a kind of structural representation of modification of the seventh embodiment of the present invention；
Fig. 9 is the structural representation of the eighth embodiment of the present invention；
Figure 10 is the structural representation of the ninth embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are elaborated below.It is emphasized that what the description below was merely exemplary,
Rather than in order to limit the scope of the present invention and its application." first " in embodiment does not imply that the part only one of which, example
Such as, " the first WDM device " can have multiple.
First embodiment
With reference to Fig. 1, the passive wavelength-division movement forward pass network system in the present embodiment includes local side B100, distal end R100, does
Road optical fiber 200, local side wavelength division multiplexer B300 and distal end wavelength division multiplexer R300, local side B100 refer to communication equipment BBU, distal end
R100 refers to communication equipment RRU.In the present embodiment, the quantity of communication equipment BBU and RRU respectively be two, be respectively B110 and
B120, R110 and R120.Communication equipment BBU and RRU come with webmaster (not shown), when there is partial fault in network,
Webmaster can provide the alarm being limited in scope.
Communication equipment BBU and RRU are used for mutually transmitting-receiving signal of communication, specifically, by configuring the optical mode on BBU and RRU
Block so that communication equipment B110 sends the flashlight of 1310nm to communication equipment R110, and communication equipment R110 is to communication equipment
B110 sends the flashlight of 1330nm；Communication equipment B120 sends the flashlight of 1350nm, communication equipment to communication equipment R120
R120 sends the flashlight of 1370nm to communication equipment B120.
Local side wavelength division multiplexer B300 is used for the photosynthetic as all the way or by light according to respective wavelength point of different wave length
It is fitted on different branch.Local side wavelength division multiplexer B300 is provided with a detection optical channel PB0, for transmitting detection light.The detection
Optical channel can thereon increase a passage reality for respective wavelength by during local side wavelength division multiplexer B300 is made
Existing, detection light can be transmitted in the passage of the respective wavelength.
Wavelength division multiplexer R300 in distal end is used for light in distal end according to respective Wavelength Assignment to correspondingly branch road or will not
Co-wavelength it is photosynthetic as all the way.A detection optical channel PR0 also is provided with distal end wavelength division multiplexer R300, is detected for transmitting
Light.The detection optical channel can thereon increase a respective wavelength by during local side wavelength division multiplexer R300 is made
Passage realize that detection light can transmit in the passage of the respective wavelength.
The fiber lengths of the branch road of distal end are different.In the present embodiment, the branch travel permit number of distal end R100 is four, point
It is not PR1, PR2, PR3 and PR4, the fiber lengths of each bar branch road are different, 5 meters incremented by successively from PR1 to PR4.
Trunk optical fiber 200 is used to for the flashlight of local side B100 to be transferred to distal end R100.
Light is sent to the input of trunk optical fiber 200 by local side wavelength division multiplexer B300 respectively for communication equipment B110 and B120
End, the flashlight of the transmission of trunk optical fiber 200 sends into communication equipment R110 and R120 after being demultiplexed through distal end wavelength division multiplexer B300.
Also include detector, the first shunt CS510, the 3rd add-drop multiplexer AD630, reflector, terminal 900 and webmaster
Equipment.
Detector, for sending detection light and detection light being sent to the detection optical channel of local side wavelength division multiplexer B300
PB0.Specifically, in the present embodiment, detector is optical time domain reflectometer 400, optical time domain reflectometer 400 sends wavelength and is
The detection light of 1650nm.
First shunt CS510, for receiving detection light and general from the detection optical channel PR0 of distal end wavelength division multiplexer R300
The detection light is divided into multichannel.In the present embodiment, the first shunt CS510 is power splitter.
3rd add-drop multiplexer AD630, for by light multiplexing or demultiplexing, being arranged on the branch road of distal end R100 and connecing
Receive the light from the first shunt CS510 outputs.
Reflector, for reflecting detection light, reflector refers to circuit tracker A800 in the present embodiment, is arranged on distal end
The branch road end of R100.
Terminal 900, for controlling optical time domain reflectometer 400 or locating the letter that reason optical time domain reflectometer 400 is passed over
Number.
In the present embodiment, local side wavelength division multiplexer B300 is the first WDM device, distal end wavelength division multiplexer R300
It is the second WDM device, the first shunt CS510 and the 3rd add-drop multiplexer AD630 constitutes optical transport unit.
Terminal 900 controls optical time domain reflectometer 400 to send the detection light that wavelength is 1650nm and detection light is sent into office
What detection the optical channel PB0, local side wavelength division multiplexer B300 of end wavelength division multiplexer B300 sent communication equipment B110 and B120
It is transferred in distal end wavelength division multiplexer R300 by trunk optical fiber 200 after the flashlight of different wave length and detection light multiplexing and is demultiplexed.
The flashlight of different wave length is exported and is respectively delivered to distal end from each signal optical channel of distal end wavelength division multiplexer R300
Each branch road of R100.The detection optical channel PR0 of distal end wavelength division multiplexer R300 exports detection light to the first shunt CS510,
By being divided into four tunnels after the first shunt CS510, this four tunnels detection light is respectively transmitted to be arranged on distal end R100 to detection light
Each branch road on the 3rd add-drop multiplexer AD630 and each branch road on signal light multiplexing and be eventually spread to the end of branch road
End.Wherein, flashlight is received by communication equipment R110 and R120, and for radio communication, and detection light is by circuit tracker A800
Backtracking is pressed after reflection, is finally received by optical time domain reflectometer 400.Due to the fiber lengths of branch road PR1, PR2, PR3 and PR4
It is arranged to different, will obtains representing the reflection peak of each branch road of distal end R100 on optical time domain reflectometer 400.
The failure of trunk optical fiber 200 and each branch road is detected by analyzing the reflection peak obtained by optical time domain reflectometer 400,
And combine the specific type for differentiating failure of alarm that the webmaster of communication equipment BBU and/or RRU is provided.If certain communication equipment RRU
Send alarm, the branch road where claiming it breaks down, and optical time domain reflectometer 400 can receive the corresponding reflection peak of the branch road and
Luminous power is normal, then show that the branch optical fibers link is intact, and failure comes from equipment.If optical time domain reflectometer 400 can be received
The reflection peak but luminous power of the branch road are substantially reduced, then show to be there may be compared with lossy, such as optical fiber on the branch optical fibers link
Bending or connector are stained.If optical time domain reflectometer 400 can not receive the corresponding reflection peak of the branch road, show the branch optical fibers
Link breaks down.If trunk optical fiber 200 breaks down, the webmaster of corresponding communication equipment BBU can send alarm.
Understood according to above-mentioned, embodiments of the invention are by making optical time domain reflectometer 400 send detection light and being sent to office
Propagated in trunk optical fiber 200 with after signal light multiplexing in the wavelength division multiplexer B300 of end, in distal end, R100 is by distal end wavelength-division multiplex
After device R300 demultiplexings, detection light is multiplexed and is admitted to each branch road again with flashlight.In this way, optical time domain reflectometer 400 is sent out
The detection light for going out just can reach each branch road, and obtain the reflection peak of each branch road in optical time domain reflectometer 400, with communication equipment
The network management alarm of BBU and/or RRU is combined, and the failure that just can distinguish network comes from equipment and also comes from optical fiber link.
Increase respectively in local side wavelength division multiplexer B300 and distal end wavelength division multiplexer R300 a detection optical channel PB0 and PR0 and
Increase some passive devices in networking, to the change very little of network, increased device is seldom also uncomplicated, with operation
Simply, the advantage of low cost.
With reference to Fig. 1, in the present embodiment, the first supply unit includes optical time domain reflectometer 400 and local side wavelength division multiplexer
B300, the second supply unit includes distal end wavelength division multiplexer R300, the first shunt CS510 and the 3rd add-drop multiplexer AD630.
First supply unit sends after detection light and the signal light multiplexing that sends detection light and communication equipment BBU output to trunk optical fiber
Detection light is sent to each branch road of distal end from trunk optical fiber 200 in distal end for 200 input, the second supply unit, finally
Via line tracker A800 is by detection light backtracking, that is, detection light is transferred to each in being multiplexed into main line with flashlight
Whether faulty to detect network through backtracking behind the end of branch road, the webmaster in conjunction with communication equipment BBU and/or RRU is accused
It is alert come whether complete detection whole network faulty and positioning failure.
First embodiment is illustrated above, but the present embodiment can also have the form of some modifications, such as：
The type of the 3rd add-drop multiplexer AD630 may be selected film filtering slice type or fused tapered.
The type of reflector may be selected grating type optical fiber or film filtering type.
Second embodiment
With reference to Fig. 2, the present embodiment is with the difference of first embodiment, in trunk optical fiber 200 near local side wavelength-division multiplex
One the first add-drop multiplexer AD610 is installed on the position of device B300, and in trunk optical fiber 200 near distal end wavelength-division multiplex
One the second add-drop multiplexer AD620 is installed on the position of device R300.
The detection light that optical time domain reflectometer 400 sends enters the first add-drop multiplexer AD610 and local side wavelength division multiplexer
Propagated in trunk optical fiber 200 after the signal light multiplexing of B300 outputs.Second add-drop multiplexer AD620 is by detection light from main line light
Fine 200 demultiplexing is out transported to the first shunt CS510.It is then detected that light is passed on each branch road again.In the present embodiment
In, the first shunt CS510 is power splitter.
In the present embodiment, local side wavelength division multiplexer B300 and the first add-drop multiplexer AD610 constitutes the first wavelength-division multiplex
Device, distal end wavelength division multiplexer R300 and the second add-drop multiplexer AD620 constitute the second WDM device, the first shunt
CS510 and the 3rd add-drop multiplexer AD630 constitutes optical transport unit.
Understood according to above-mentioned, the present embodiment also has the effect of first embodiment.Additionally, the present embodiment is for local side wavelength-division
Multiplexer B300 and distal end wavelength division multiplexer R300 are not provided with detecting that the situation of optical channel is also suitable, the two of trunk optical fiber 200
End is respectively mounted a first add-drop multiplexer AD610 and the second add-drop multiplexer AD620.
With reference to Fig. 2, in the present embodiment, the first supply unit includes the add-drop multiplexer of optical time domain reflectometer 400 and first
AD610, the second supply unit includes the second add-drop multiplexer AD620, the first shunt CS510 and the 3rd add-drop multiplexer
AD630。
3rd embodiment
With reference to Fig. 3, the present embodiment is with the difference of first embodiment, in trunk optical fiber 200 near distal end wavelength-division multiplex
One the second add-drop multiplexer AD620 is installed on the position of device R300.Second add-drop multiplexer AD620 is by detection light from main line
Optical fiber 200 is demultiplexed out and is transported to the first shunt CS510.It is then detected that light is passed on each branch road again.In this implementation
In example, the first shunt CS510 is power splitter.
In the present embodiment, local side wavelength division multiplexer B300 is the first WDM device, distal end wavelength division multiplexer R300
The second WDM device, the first shunt CS510 and the 3rd add-drop multiplexer are constituted with the second add-drop multiplexer AD620
AD630 constitutes optical transport unit.
It can be seen from the above, the present embodiment also has the effect of first embodiment.Additionally, the present embodiment is for distal end
Wavelength division multiplexer R300 is not provided with detecting that the situation of optical channel is also suitable, in trunk optical fiber 200 near distal end wavelength division multiplexer
One the second add-drop multiplexer AD620 is installed on the position of R300.
With reference to Fig. 3, in the present embodiment, the first supply unit includes optical time domain reflectometer 400 and local side wavelength division multiplexer
B300, the second supply unit includes the second add-drop multiplexer AD620, the first shunt CS510 and the 3rd add-drop multiplexer
AD630。
Fourth embodiment
With reference to Fig. 4, the present embodiment is with the difference of first embodiment, in trunk optical fiber 200 near local side wavelength-division multiplex
One the first add-drop multiplexer AD610 is installed on the position of device B300.The detection light that optical time domain reflectometer 400 sends enters
Propagated in trunk optical fiber 200 after the signal light multiplexing of one add-drop multiplexer AD610 and local side wavelength division multiplexer B300 outputs.
In the present embodiment, local side wavelength division multiplexer B300 and the first add-drop multiplexer AD610 constitutes the first wavelength-division multiplex
Device, distal end wavelength division multiplexer R300 is the second WDM device, the first shunt CS510 and the 3rd add-drop multiplexer
AD630 constitutes optical transport unit.
In the present embodiment, the first shunt CS510 is power splitter.
It can be seen from the above, the present embodiment also has the effect of first embodiment.Additionally, the present embodiment is for local side
Wavelength division multiplexer B300 is not provided with detecting that the situation of optical channel is also suitable, in trunk optical fiber 200 near local side wavelength division multiplexer
One the first add-drop multiplexer AD610 is installed on the position of B300.
With reference to Fig. 4, in the present embodiment, the first supply unit includes the add-drop multiplexer of optical time domain reflectometer 400 and first
AD610, the second supply unit includes distal end wavelength division multiplexer R300, the first shunt CS510 and the 3rd add-drop multiplexer
AD630。
5th embodiment
Referring to figs. 1 to Fig. 5, the present embodiment is with the difference of first, second, third and fourth embodiment, the network system of the present embodiment
System includes two articles of trunk optical fiber 200A and 200B, the 3rd shunt CS530, and the 3rd shunt CS530 is photoswitch, local side ripple
Division multiplexer B300A is provided with detection optical channel PB0, and the first add-drop multiplexer AD610 is provided with trunk optical fiber 200B.Light time
The detection light that domain reflectometer 400 sends is switched to the detection optical channel of local side wavelength division multiplexer B300A through the 3rd shunt CS530
PB0 is upper or the first add-drop multiplexer AD610 on.
Understood according to above-mentioned, be sent to the detection light that optical time domain reflectometer 400 sends by a 3rd shunt CS530
On local side wavelength division multiplexer B300A or on the first add-drop multiplexer AD610, so as to can be examined with an optical time domain reflectometer 400
Survey has two network systems of trunk optical fiber, saves resource, reduces cost.
The present embodiment also has the effect of first, second, third and fourth embodiment.
In the present embodiment, the first supply unit includes optical time domain reflectometer 400, the 3rd shunt CS530, local side wavelength-division
Multiplexer B300A and the first add-drop multiplexer AD610, the second supply unit includes distal end wavelength division multiplexer R300, the first branch
Device CS510, the second add-drop multiplexer AD620 and the 3rd add-drop multiplexer AD630.
In the present embodiment, the first shunt CS510 is power splitter.
First embodiment is illustrated above, but the present embodiment can also have the form of some modifications, such as：
The quantity of the trunk optical fiber in network system is more than two；
The quantity of detector is more than two more than the quantity of the two and/or the 3rd shunt；
3rd shunt CS530 can also use power splitter, and the detection light that optical time domain reflectometer 400 sends is through the 3rd branch
Device CS530 is transferred on the detection optical channel PB0 of local side wavelength division multiplexer B300A and the first add-drop multiplexer AD610, so that with
One optical time domain reflectometer 400 can simultaneously detect more than two network systems of trunk optical fiber；
Distal end wavelength division multiplexer can be not provided with detecting optical channel, accordingly, in trunk optical fiber near distal end wavelength division multiplexer
Position on install an add-drop multiplexer.
Sixth embodiment
With reference to Fig. 6, the passive wavelength-division movement forward pass network system in the present embodiment includes three trunk optical fibers, is respectively
A200, B200 and C200, also including light extractor, first order light shifter 720, wavelength division multiplexer 730, second level light shifter
740th, testing equipment 1100 and terminal 900.Light extractor is used to extract light, in the present embodiment, power splitter from trunk optical fiber
710 is light extractor.
Power splitter 710 is used to extract a part of luminous power from trunk optical fiber.
First order light shifter 720 is a photoswitch, the output for controlling light.
Wavelength division multiplexer 730 is used for Optical Demultiplexing.The light selected in the wavelength and network system of wavelength division multiplexer 730
Wavelength correspondence, each wavelength used in every trunk optical fiber of covering.For the network that a uplink and downlink respectively have N number of wavelength
System, wavelength division multiplexer 730 should have whole 2N wavelength.In the present embodiment, the uplink and downlink in network system respectively have
Six wavelength, so wavelength division multiplexer 730 has 12 wavelength.
Second level light shifter 740 is also a photoswitch, the output for controlling light.
In the present embodiment, two-stage switch 700 includes power splitter 710, first order light shifter 720, wavelength division multiplexer
730 and second level light shifter 740.
Terminal 900 is used to control two-stage switch 700.
A power splitter 710 is separately installed with every trunk optical fiber, first order light shifter 720 receives three power splitters
710 light extracted from trunk optical fiber simultaneously selectively export the light in a trunk optical fiber to wavelength division multiplexer 730.Light is by ripple
Division multiplexer 730 is admitted to second level light shifter 740 after demultiplexing into the light of different wave length, and second level light shifter 740 is selected
Export to selecting property the light of some wavelength to testing equipment 1100.
It can be seen from the above, when network system is run, the control first order of terminal 900 light shifter 720 selects a certain
Trunk optical fiber, control second level light shifter 740 then selects a certain wavelength, testing equipment 1100 to receive certain trunk optical fiber
Some wavelength light.In this way, all flashlights that just can be in local side B100 detects network.Divide by flashlight
Analysis, can detect the various failures in network, the time delay and jitterbug of such as signal transmission.Particularly work as testing equipment
1100 using wireless protocols analyzer when, wireless signal can be detected in local side B100, it is to avoid operation on unnecessary tower,
The problems such as being disturbed so as to quick detection noise.
In addition, being used cooperatively with the detection means being made up of the first supply unit, the second supply unit and reflector, play
The effect being complementary to one another.When network breaks down, with the webmaster remover apparatus event of equipment own communication device BBU and/or RRU
Barrier, flashlight and wireless signal failure are excluded with testing equipment 1100, and optical fiber chain is excluded with detector (optical time domain reflectometer 400)
Road failure, you can comprehensively and accurately position failure, so as to quickly repair, ensures communication quality.
With reference to Fig. 6, in the present embodiment, the 3rd supply unit includes power splitter 710, first order light shifter 720, wavelength-division
Multiplexer 730 and second level light shifter 740.
First embodiment is illustrated above, but the present embodiment can also have the form of some modifications, such as：
Light extractor can also be add-drop multiplexer；
The technical scheme of the present embodiment can also be combined with the technical scheme of the 5th embodiment.
7th embodiment
With reference to Fig. 7, the present embodiment is with the difference of sixth embodiment, also including the second shunt CS520, the second branch
Device CS520 has two output ends, and second level light shifter 740 increases a passage.In the present embodiment, the second shunt
CS20 is power splitter.
Light outgoing from first order light shifter 720, into the second shunt CS520 after be divided into two-way light, light all the way
Export wavelength division multiplexer 730, another road light output to second level light shifter 740.
Light extractor, i.e. power splitter 710, extract the flashlight feeding first order light shifter 720 of a certain trunk optical fiber, eventually
End 900 controls first order light shifter 720 that certain flashlight of trunk optical fiber is sent into the second shunt CS520, and flashlight is not
By wavelength division multiplexer 730, directly from the second shunt CS520 outputs to second level light shifter 740, testing equipment 1100 can
To receive certain the not demultiplexed flashlight of trunk optical fiber.If from the flashlight warp of the second shunt CS520 outputs
Wavelength division multiplexer 730 is crossed, then controls second level light shifter 740 that the flashlight of a certain wavelength, testing equipment 1100 then may be selected
Certain flashlight of some wavelength of trunk optical fiber can be received.By checking the spectrum of whole flashlights, can be quick
The power and wavelength of the whole flashlights of detection, so as to realize quickly searching failure and improve communication quality.
With reference to Fig. 7, in the present embodiment, the 3rd supply unit includes power splitter 710, first order light shifter 720, second
Shunt CS520, wavelength division multiplexer 730 and second level light shifter 740.
First embodiment is illustrated above, but the present embodiment can also have the form of some modifications, such as：
Second shunt CS520 can have at least three passages, and accordingly, second level light shifter 740 is further added by one
Passage；
With reference to Fig. 8, the second shunt CS520 is replaced with a third level light shifter 750.
8th embodiment
With reference to Fig. 6 to Fig. 9, the present embodiment is that wavelength division multiplexer 730 is thick with one with the difference of the six, the seven embodiments
Wavelength division multiplexer 731 and a dense wave division multiplexer 732 replace.
The present embodiment is suitable for backbone transport by the way of CWDM and dense wave division multipurpose mixing.Light extraction
Device, i.e. power splitter 710, extract the flashlight feeding first order light shifter 720 of a certain trunk optical fiber.Wherein, CWDM
Flashlight sent into by first order light shifter 720 and demultiplex in Coarse Wave Division Multiplexer 731 after, into second level light shifter
740.The flashlight of dense wave division multipurpose is introduced into Coarse Wave Division Multiplexer 731, then from the corresponding wavelength of Coarse Wave Division Multiplexer 731
Port is exported onto dense wave division multiplexer 732, after being demultiplexed by dense wave division multiplexer 732, from dense wave division multiplexer 732
The output of corresponding wavelength port to second level light shifter 740.
Understood according to above-mentioned, Coarse Wave Division Multiplexer 731 cooperates with dense wave division multiplexer 732, even if being passed on main line
It is defeated middle by the way of CWDM and dense wave division multipurpose mixing, it is also possible to which that network is detected.
In the present embodiment, the 3rd supply unit includes power splitter 710, first order light shifter 720, Coarse Wave Division Multiplexer
731st, dense wave division multiplexer 732 and second level light shifter 740.
9th embodiment
With reference to Fig. 6 and Figure 10, the present embodiment is that the network system in the present embodiment includes with the difference of sixth embodiment
Two two-stage switch 700, two two-stage switch 700 can share a testing equipment 1100.
One two-stage switch gathers three upward signal light of trunk optical fiber, and another then gathers downstream signal light；Or
One two-stage switch of person gathers three half flashlights of trunk optical fiber, and another then gathers second half flashlight.In this way, adopting
At least flashlight of the two-way from two-stage switch can be simultaneously detected with same testing equipment 1100, including upward signal light,
Downstream signal light, the half flashlight on certain main line.
It can be seen from the above, detection simultaneously is carried out to the flashlight of trunk optical fiber by two two-stage switch, can
To reduce the detection time of half, failure that can quickly in Network Search.
First embodiment is illustrated above, but the present embodiment can also have the form of some modifications, such as：
The scheme of the present embodiment can also be used in the seven, the eight embodiments；
At least three two-stage switch can also be used, the time of detection can be further reduced；
Second level light shifter 740 can select the photoswitch for having two or more output channel, accordingly increase testing equipment,
Each output channel one testing equipment of correspondence of second level light shifter 740, so can further reduce detection time.
Above content is to combine specific/preferred embodiment further description made for the present invention, it is impossible to recognized
Fixed specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, its implementation method that can also have been described to these makes some replacements or modification,
And these are substituted or variant should all be considered as belonging to protection scope of the present invention.
Claims (10)
1. forward pass network system is moved in a kind of passive wavelength-division, it is characterised in that including local side, distal end and trunk optical fiber, also included
Detector, the first WDM device, the second WDM device, optical transport unit, reflector；The detector and described
Light path can be formed between one WDM device, one end of the trunk optical fiber is connected with first WDM device, institute
The other end for stating trunk optical fiber is connected with second WDM device, and the optical transport unit can be by detection light from described
The output end of two WDM devices is sent to each branch road of the distal end, and the reflector is arranged on each of the distal end
The end of branch road.
2. passive wavelength-division movement forward pass network system as claimed in claim 1, it is characterised in that also including two-stage switch and
Testing equipment, the two-stage switch includes the switching of light extractor, first order light shifter, wavelength division multiplexer and second level light
Device, the light extractor is arranged in the trunk optical fiber, and the first order light shifter receives the light extractor output
Light, wavelength division multiplexer transmission light between the first order light shifter and the second level light shifter, the detection
Equipment receives the light of the second level light shifter output.
3. passive wavelength-division movement forward pass network system as claimed in claim 2, it is characterised in that also including the second shunt or
Third level light shifter, the wavelength division multiplexer receives described the by second shunt or the third level light shifter
The light of one-level light shifter output, the second level light shifter receives the light of the second shunt output or the third level
The light of light shifter output.
4. forward pass network system is moved in passive wavelength-division as claimed in claim 2, it is characterised in that the wavelength division multiplexer is with slightly
The dense wave division multiplexer of wavelength division multiplexer and the light for receiving the Coarse Wave Division Multiplexer output replaces, the first order light switching
Device receives from the dense wave division multiplexer outgoing light output to the Coarse Wave Division Multiplexer, the second level light shifter
Light.
5. forward pass network system is moved in the passive wavelength-division as described in claim any one of 2-4, it is characterised in that the two-stage is cut
The quantity of parallel operation is two or more；One two-stage switch gathers the upward signal of the trunk optical fiber, one described two
Level switch gathers the downstream signal of the trunk optical fiber；Or a two-stage switch gathers the one of the trunk optical fiber
Half signal, a two-stage switch gathers second half signal of the trunk optical fiber.
6. forward pass network system is moved in the passive wavelength-division as described in claim any one of 2-4, it is characterised in that also including at least
One terminal, the terminal is connected with the two-stage switch and/or the testing equipment, and the terminal can send alarm letter
Number.
7. forward pass network system is moved in passive wavelength-division as claimed in claim 1, it is characterised in that the first wavelength-division multiplex dress
The local side wavelength division multiplexer for being provided with detection optical channel is set to, or by being not provided with detecting the local side wavelength division multiplexer and the of optical channel
One add-drop multiplexer is constituted；Second WDM device is the distal end wavelength division multiplexer for being provided with detection optical channel, Huo Zheyou
It is not provided with detecting that the distal end wavelength division multiplexer and the second add-drop multiplexer of optical channel are constituted；The optical transport unit includes first point
Road device and the 3rd add-drop multiplexer, first shunt can be in second WDM device and the 3rd add drop multiplex
Light is extracted between device, the 3rd add-drop multiplexer is set on the branch road of the distal end.
8. forward pass network system is moved in passive wavelength-division as claimed in claim 7, it is characterised in that also including the 3rd shunt,
The light travels that the detector sends are transferred to the detection light of local side wavelength division multiplexer to after the 3rd shunt
On passage and/or on first add-drop multiplexer, the quantity of the detector is at least one, the number of the 3rd shunt
Amount is at least one.
9. forward pass network system is moved in a kind of passive wavelength-division, it is characterised in that including local side, distal end and trunk optical fiber, also included：
First supply unit, for detection light to be transported into the trunk optical fiber in one end of the trunk optical fiber；Second supply unit,
Detection light is transferred to each branch road of the distal end for the other end in the trunk optical fiber from the trunk optical fiber；Reflection
Device, is arranged on the end of each branch road of distal end, for reflecting detection light；Propped up by making detection light be delivered to each through main line
It is whether faulty to detect network through backtracking behind the end on road.
10. forward pass network system is moved in passive wavelength-division as claimed in claim 9, it is characterised in that also single including the 3rd conveying
Unit and testing equipment, the 3rd supply unit are used for the flashlight of the flashlight of different trunk optical fibers and/or different wave length
The testing equipment is transferred to, whether the testing equipment has exception for detection signal light；By from the trunk optical fiber
Whether all of flashlight is faulty to detect network in extracting network.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018137212A1 (en) * | 2017-01-25 | 2018-08-02 | 深圳太辰光通信股份有限公司 | Passive wavelength division mobile fronthaul network system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040023305A (en) * | 2002-09-11 | 2004-03-18 | 주식회사 케이티 | Supervisory system for WDM-PON fiber using OTDR |
| US20080291431A1 (en) * | 2007-05-22 | 2008-11-27 | Wang Chih-Yih | Apparatus for monitoring optical obstructions in an optical split network and method thereof |
| CN103227677A (en) * | 2013-04-28 | 2013-07-31 | 桂林聚联科技有限公司 | Optical fiber reflector and method of utilizing optical fiber reflector to achieve PON monitoring |
| CN103763020A (en) * | 2014-02-12 | 2014-04-30 | 烽火通信科技股份有限公司 | ONU real-time detection management method and optical line terminal equipment in WDM-PON system |
| CN204103924U (en) * | 2014-09-03 | 2015-01-14 | 烽火通信科技股份有限公司 | A kind of independent external optical fiber link monitoring system |
| CN105337660A (en) * | 2014-06-23 | 2016-02-17 | 上海贝尔股份有限公司 | Methods for monitoring drop fiber link fault in TDM/TWDM-PON system and apparatuses |
-
2017
- 2017-01-25 CN CN201710061350.2A patent/CN106817159B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040023305A (en) * | 2002-09-11 | 2004-03-18 | 주식회사 케이티 | Supervisory system for WDM-PON fiber using OTDR |
| US20080291431A1 (en) * | 2007-05-22 | 2008-11-27 | Wang Chih-Yih | Apparatus for monitoring optical obstructions in an optical split network and method thereof |
| CN103227677A (en) * | 2013-04-28 | 2013-07-31 | 桂林聚联科技有限公司 | Optical fiber reflector and method of utilizing optical fiber reflector to achieve PON monitoring |
| CN103763020A (en) * | 2014-02-12 | 2014-04-30 | 烽火通信科技股份有限公司 | ONU real-time detection management method and optical line terminal equipment in WDM-PON system |
| CN105337660A (en) * | 2014-06-23 | 2016-02-17 | 上海贝尔股份有限公司 | Methods for monitoring drop fiber link fault in TDM/TWDM-PON system and apparatuses |
| CN204103924U (en) * | 2014-09-03 | 2015-01-14 | 烽火通信科技股份有限公司 | A kind of independent external optical fiber link monitoring system |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10439710B2 (en) | 2017-01-25 | 2019-10-08 | T&S Communications Co., Ltd. | Passive wavelength division mobile fronthaul network system |
| WO2018137212A1 (en) * | 2017-01-25 | 2018-08-02 | 深圳太辰光通信股份有限公司 | Passive wavelength division mobile fronthaul network system |
| CN109150300A (en) * | 2018-07-26 | 2019-01-04 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multi-path digital signal transmission by optical fiber test equipment |
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| US11784742B2 (en) | 2019-06-06 | 2023-10-10 | China Mobile Communication Co., Ltd Research Institute | Optical module, management and control information processing method, and communication system |
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| CN112118070B (en) * | 2019-06-20 | 2023-01-13 | 中国移动通信有限公司研究院 | Control method of forwarding network, network equipment and system |
| CN112118068A (en) * | 2019-06-20 | 2020-12-22 | 中国移动通信有限公司研究院 | State monitoring method, device, equipment and storage medium of forwarding network |
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| CN112118068B (en) * | 2019-06-20 | 2022-10-21 | 中国移动通信有限公司研究院 | State monitoring method, device, equipment and storage medium of forwarding network |
| CN112187344A (en) * | 2019-07-02 | 2021-01-05 | 北京见合八方科技发展有限公司 | Wavelength division passive optical access network system and equipment |
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| CN110933533A (en) * | 2019-11-18 | 2020-03-27 | 中通服咨询设计研究院有限公司 | Optical path backup method and device |
| CN110933533B (en) * | 2019-11-18 | 2022-07-01 | 中通服咨询设计研究院有限公司 | Optical path backup method and device |
| CN112929079B (en) * | 2019-12-05 | 2022-09-16 | 华为技术有限公司 | Fault detection device and method for optical fiber link and optical communication system |
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| CN114124205A (en) * | 2020-08-31 | 2022-03-01 | 中国电信股份有限公司 | Fronthaul wavelength division link and fault detection method and system thereof |
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