CN106817159B - A kind of mobile forward pass network system of passive wavelength-division - Google Patents
A kind of mobile forward pass network system of passive wavelength-division Download PDFInfo
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- CN106817159B CN106817159B CN201710061350.2A CN201710061350A CN106817159B CN 106817159 B CN106817159 B CN 106817159B CN 201710061350 A CN201710061350 A CN 201710061350A CN 106817159 B CN106817159 B CN 106817159B
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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 mobile forward pass network system of passive wavelength-division, which is characterized in that including local side, distal end and trunk optical fiber, further includes: the first supply unit is transported to the trunk optical fiber for will test light in one end of the trunk optical fiber；Second supply unit, for will test each branch that light is transferred to from the trunk optical fiber distal end in the other end of the trunk optical fiber；The end of each branch in the distal end is arranged in, for reflecting detection light in reflector.It will test photosynthesis to trunk optical fiber by the first supply unit, by the second supply unit in each branch that distally will test light from trunk optical fiber and be transferred to distal end, it most will test light backtracking through reflector afterwards, so just realize whether faulty with each branch of detection light detection trunk optical fiber and distal end.The present invention is small to the change of network, and increased element is few, has the advantages that easy to operate, at low cost.
Description
Technical field
The present invention relates to the mobile forward pass network field of passive wavelength-division, in particular to a kind of mobile forward pass network system of passive wavelength-division
System.
Background technique
With quickly universal and mobile Internet the rapid development of intelligent terminal, mobile service is exponentially increased, runs
The mobile network of quotient is faced with the pressure of bigger transmission data service.C-RAN(Cloud/Centralized Radio
Access Network, centralization Radio Access Network) become wireless forward pass network Development important trend.
The forward pass scheme of passive wavelength-division is that multiple signals are passed through CWDM/DWDM (Coarse Wavelength
Division Multiplexer, Coarse Wave Division Multiplexer；Dense Wavelength Division Multiplexer, intensively
Wavelength division multiplexer) combining after transmitted using optical fiber, thus under limited fiber resource to mobile network carry out dilatation.The party
Case uses passive transmission equipment, has without power supply, does not introduce additional active equipment and propagation delay time, and to various businesses and biography
The advantages of defeated transparent rate.
In the installation and operation of C-RAN forward pass network, how comprehensively diagnostic network failure is particularly important.Mainly
Failure cause include: RRU (Radio Remote Unit, Remote Radio Unit) power supply power supply interrupt, transmission fiber interrupt,
RRU device failure itself, transmission jitter delay failure, RRU wireless signal are disturbed.
OTDR (Optical Time Domain Reflectometer, optical time domain reflectometer) is that one kind is used to detect 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, since each branch after wavelength division component can only transmit spy
Standing wave is long, and common U wave band (Ultralong wavelength band, wavelength are the optical band of 1625-1675nm) OTDR is set
It is standby to be difficult to detect the link circuit condition of the branch after wavelength division component.
Summary of the invention
The purpose of the invention is to propose a kind of nothing convenient for diagnosing the network failure in the mobile forward pass network of passive wavelength-division
Forward pass network system is moved in source wavelength-division.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of mobile forward pass network system of passive wavelength-division, which is characterized 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
Optical path can be formed between first WDM device, one end of the trunk optical fiber is connect with first WDM device,
The other end of the trunk optical fiber is connect with second WDM device, and the optical transport unit can will test light from described
The output end of second WDM device is sent to each branch of the distal end, and each of the distal end is arranged in the reflector
The end of a branch.
It in some preferred embodiments, further include two-stage switch and detection device, the two-stage switch includes
Light extractor, first order light shifter, wavelength division multiplexer and second level light shifter, the light extractor are mounted 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
Light is transmitted between light shifter and the second level light shifter, the detection device receives the second level light shifter output
Light.
It further include the second splitter or third level light shifter in further preferred embodiment, the wavelength-division is multiple
The light of the first order light shifter output is received by second splitter or the third level light shifter with device, it is described
Second level light shifter receives the light of the second splitter output or the light of third level light shifter output.
In further preferred embodiment, the wavelength division multiplexer Coarse Wave Division Multiplexer and the reception thick wavelength-division
The dense wave division multiplexer of the light of multiplexer output replaces, and the first order light shifter is by light output to the coarse wavelength division multiplexing
Device, the second level light shifter receive the light being emitted from the dense wave division multiplexer.
In further preferred embodiment, the quantity of the two-stage switch is two or more；One two-stage
Switch acquires the uplink signal of the trunk optical fiber, and a two-stage switch acquires the downlink letter of the trunk optical fiber
Number；Or a two-stage switch acquires the half signal of the trunk optical fiber, a two-stage switch acquires institute
State the other half signal of trunk optical fiber.
It further include at least one terminal, the terminal and the two-stage switch in further preferred embodiment
And/or the detection device connection, the capable of emitting alarm signal of terminal.
In some preferred embodiments, first WDM device is the local side wavelength-division equipped with detection optical channel
Multiplexer, or the local side wavelength division multiplexer by being not provided with detection optical channel and the first add-drop multiplexer are constituted；Second wave
Dividing multiplexer is the distal end wavelength division multiplexer equipped with detection optical channel, or the distal end wavelength-division by being not provided with detection optical channel is answered
It is constituted with device and the second add-drop multiplexer；The optical transport unit includes the first splitter and third add-drop multiplexer, and described the
One splitter can extract light between second WDM device and the third add-drop multiplexer, and the third point is inserted multiple
It is arranged on the branch road of the distal end with device.
It further include third splitter in further preferred embodiment, the light travels that the detector issues
To after the third splitter, it is transferred on the detection optical channel of local side wavelength division multiplexer and/or described first point is inserted again
With on device, the quantity of the detector is at least one, and the quantity of the third splitter is at least one.
On the other hand, the present invention also provides following technical solutions:
A kind of mobile forward pass network system of passive wavelength-division, which is characterized in that including local side, distal end and trunk optical fiber, also wrap
Include: the first supply unit is transported to the trunk optical fiber for will test light in one end of the trunk optical fiber；Second conveying is single
Member, for will test each branch that light is transferred to from the trunk optical fiber distal end in the other end of the trunk optical fiber；
The end of each branch in the distal end is arranged in, for reflecting detection light in reflector；By being transmitted to detection light respectively through main line
It is whether faulty to detect network through backtracking behind the end of a branch.
It in some preferred embodiments, further include third supply unit and detection device, the third supply unit
For the signal light of the signal light of different trunk optical fibers and/or different wave length to be transferred to the detection device, the detection is set
It is ready for use on whether detection signal light has exception；By from all signal light is extracted in network in the trunk optical fiber to detect net
Whether network is faulty.
Compared with prior art, the beneficial effects of the present invention are as follows:
The present invention will test photosynthesis to trunk optical fiber by the first supply unit, will be examined by the second supply unit in distal end
Each branch that light is transferred to distal end from trunk optical fiber is surveyed, most light backtracking is will test through reflector afterwards, so just realizes
Whether each branch 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 easy to operate, at low cost.
In a preferred embodiment, the present invention also has the following beneficial effects:
Further, third supply unit can be by the signal light of different trunk optical fibers and/or the signal light of different wave length
Be transported to detection device, to be detected to the various signal lights in network, with the first supply unit, the second supply unit and
Reflector is used in combination, can be with the failure of complete detection network.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the second embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the third embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the fourth embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the fifth embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the sixth embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the seventh embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of modification of the seventh embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the eighth embodiment of the present invention；
Figure 10 is the structural schematic diagram of the ninth embodiment of the present invention.
Specific embodiment
It elaborates below to embodiments of the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention." first " in embodiment do not imply that the component only one, example
Such as, " the first WDM device " can have multiple.
First embodiment
With reference to Fig. 1, the mobile forward pass network system of passive wavelength-division 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 is respectively two, be respectively B110 and
B120, R110 and R120.Communication equipment BBU and RRU come with network management (not shown), when there is partial fault in network,
Network management can provide the alarm being limited in scope.
Communication equipment BBU and RRU are for mutually receiving and dispatching signal of communication, specifically, by configuring the optical mode on BBU and RRU
Block, so that communication equipment B110 issues the signal light of 1310nm to communication equipment R110, communication equipment R110 is to communication equipment
The signal light of B110 sending 1330nm；Communication equipment B120 issues the signal light of 1350nm, communication equipment to communication equipment R120
R120 issues the signal light of 1370nm to communication equipment B120.
Local side wavelength division multiplexer B300 is used to become the photosynthetic of different wave length all the way or by light according to respective wavelength point
It is fitted on different branch.Local side wavelength division multiplexer B300 is equipped with a detection optical channel PB0, is used for transmission detection light.The detection
Optical channel can be real by increasing the channel an of respective wavelength on it during making local side wavelength division multiplexer B300
Existing, detection light can be transmitted in the channel of the respective wavelength.
Distal end wavelength division multiplexer R300 is used for light in distal end according to respective Wavelength Assignment to correspondence branch or will not
The photosynthetic of co-wavelength becomes all the way.It also is provided with a detection optical channel PR0 on the wavelength division multiplexer R300 of distal end, is used for transmission detection
Light.The detection optical channel can be by increasing a respective wavelength during making local side wavelength division multiplexer R300 on it
Channel realize that detection light can transmit in the channel of the respective wavelength.
The fiber lengths of the branch 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 branch are different, and 5 meters incremented by successively from PR1 to PR4.
Trunk optical fiber 200 is used to the signal light of local side B100 being transferred to distal end R100.
Communication equipment B110 and B120 pass through the input that light is sent to trunk optical fiber 200 by local side wavelength division multiplexer B300 respectively
End, the signal light that trunk optical fiber 200 is transmitted are sent into communication equipment R110 and R120 after distal end wavelength division multiplexer B300 demultiplexing.
It further include detector, the first splitter CS510, third add-drop multiplexer AD630, reflector, terminal 900 and network management
Equipment.
Detector, for issuing detection light and will test the detection optical channel that light is sent to local side wavelength division multiplexer B300
PB0.Specifically, in the present embodiment, detector is optical time domain reflectometer 400, optical time domain reflectometer 400 issues wavelength and is
The detection light of 1650nm.
First splitter CS510, for receiving detection light from the detection optical channel PR0 of distal end wavelength division multiplexer R300 and inciting somebody to action
The detection light is divided into multichannel.In the present embodiment, the first splitter CS510 is power splitter.
Third add-drop multiplexer AD630, for being arranged in light multiplexing or demultiplexing on the branch road of distal end R100 and connecing
Receive the light exported from the first splitter CS510.
Reflector, for reflecting detection light, reflector refers to route tracker A800 in the present embodiment, and setting is in distal end
The branch end of R100.
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 splitter CS510 and third add-drop multiplexer AD630 constitute optical transport unit.
The control optical time domain reflectometer 400 of terminal 900, which issues the detection light that wavelength is 1650nm and will test light, is sent to office
What detection the optical channel PB0, local side wavelength division multiplexer B300 of end wavelength division multiplexer B300 issued communication equipment B110 and B120
It is transferred in the wavelength division multiplexer R300 of distal end and is demultiplexed by trunk optical fiber 200 after the signal light of different wave length and detection light multiplexing.
The signal light of different wave length exports from each signal optical channel of distal end wavelength division multiplexer R300 and is respectively delivered to distal end
Each branch of R100.The detection optical channel PR0 of distal end wavelength division multiplexer R300 exports detection light to the first splitter CS510,
Detection light is divided into four tunnels after the first splitter CS510, this four tunnels detection light is respectively transmitted to be arranged in distal end R100
The third add-drop multiplexer AD630 of each road and the signal light multiplexing of each branch road and be eventually spread to the end of branch
End.Wherein, signal light is received by communication equipment R110 and R120, and for wirelessly communicating, and detection light is by route tracker A800
Backtracking is pressed after reflection, is finally received by optical time domain reflectometer 400.Due to the fiber lengths of branch PR1, PR2, PR3 and PR4
It is arranged to different, the reflection peak for representing each branch of distal end R100 will be obtained on optical time domain reflectometer 400.
The failure of trunk optical fiber 200 and each branch is detected by the analysis obtained reflection peak of optical time domain reflectometer 400,
And the specific type for differentiating failure of alarm for combining the network management of communication equipment BBU and/or RRU to provide.If some communication equipment RRU
Issue alarm, the branch where claiming it breaks down, and optical time domain reflectometer 400 can receive the corresponding reflection peak of the branch and
Optical power is normal, then shows that the branch optical fibers link is intact, failure is from equipment.If optical time domain reflectometer 400 can receive
The reflection peak but optical power of the branch are substantially reduced, then show that there may be compared with lossy, such as optical fiber for the branch optical fibers chain road
Bending or connector are stained.If optical time domain reflectometer 400 cannot receive the corresponding reflection peak of the branch, show the branch optical fibers
Link breaks down.If trunk optical fiber 200 breaks down, the network management of corresponding communication equipment BBU can issue alarm.
As described above, the embodiment of the present invention is by making optical time domain reflectometer 400 issue detection light and being sent to office
It is propagated in trunk optical fiber 200 in the wavelength division multiplexer B300 of end with after signal light multiplexing, in distal end, R100 is by distal end wavelength-division multiplex
After device R300 demultiplexing, detection light and signal light are multiplexed again and are admitted to each branch.In this way, optical time domain reflectometer 400 is sent out
Detection light out can reach each branch, and obtain the reflection peak of each branch in optical time domain reflectometer 400, with communication equipment
The network management alarm of BBU and/or RRU combines, and the failure that can distinguish network comes from equipment and also comes from optical fiber link.
Increased separately in local side wavelength division multiplexer B300 and distal end wavelength division multiplexer R300 a detection optical channel PB0 and PR0 and
Increase several passive devices in network, to the change very little of network, increased device is seldom also uncomplicated, has operation
Simply, advantage at 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 include distal end wavelength division multiplexer R300, the first splitter CS510 and third add-drop multiplexer AD630.
First supply unit issues detection light and is output to trunk optical fiber after will test the signal light multiplexing that light and communication equipment BBU are issued
200 input terminal, the second supply unit are sent to each branch of distal end distally will test light from trunk optical fiber 200, finally
Via line tracker A800 will test light backtracking, that is, make detection light be multiplexed into main line with signal light be transferred to it is each
Through backtracking to detect whether network is faulty behind the end of branch, accused in conjunction with the network management of communication equipment BBU and/or RRU
It is alert come whether complete detection whole network faulty and positioning failure.
First embodiment is illustrated above, but the present embodiment there can also be the form of some modifications, such as:
Film filtering slice type or fused tapered may be selected in the type of third add-drop multiplexer AD630.
Grating type optical fiber or film filtering type may be selected in the type of reflector.
Second embodiment
With reference to Fig. 2, the difference of the present embodiment and first embodiment is, in trunk optical fiber 200 close to local side wavelength-division multiplex
One the first add-drop multiplexer AD610 is installed, and in trunk optical fiber 200 close to distal end wavelength-division multiplex on the position of device B300
One the second add-drop multiplexer AD620 is installed on the position of device R300.
The detection light that optical time domain reflectometer 400 issues enters the first add-drop multiplexer AD610 and local side wavelength division multiplexer
It is propagated in trunk optical fiber 200 after the signal light multiplexing of B300 output.Second add-drop multiplexer AD620 will test light from main line light
200 demultiplexing of fibre, which comes out, is transported to the first splitter CS510.It is then detected that light is passed to each branch road again.In the present embodiment
In, the first splitter 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 splitter
CS510 and third add-drop multiplexer AD630 constitutes optical transport unit.
As described above, the present embodiment also has the effect of first embodiment.In addition, the present embodiment is for local side wavelength-division
Multiplexer B300 and distal end wavelength division multiplexer R300 be not provided with detection optical channel the case where be also suitable, the two of trunk optical fiber 200
One the first add-drop multiplexer AD610 and the second add-drop multiplexer AD620 is installed at end respectively.
With reference to Fig. 2, in the present embodiment, the first supply unit includes optical time domain reflectometer 400 and the first add-drop multiplexer
AD610, the second supply unit include the second add-drop multiplexer AD620, the first splitter CS510 and third add-drop multiplexer
AD630。
3rd embodiment
With reference to Fig. 3, the difference of the present embodiment and first embodiment is, in trunk optical fiber 200 close to 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 will test light from main line
The demultiplexing of optical fiber 200, which comes out, is transported to the first splitter CS510.It is then detected that light is passed to each branch road again.In this implementation
In example, the first splitter 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 splitter CS510 and third add-drop multiplexer are constituted with the second add-drop multiplexer AD620
AD630 constitutes optical transport unit.
According to above content it is found that the present embodiment also has the effect of first embodiment.In addition, the present embodiment is for distal end
Wavelength division multiplexer R300 be not provided with detection optical channel the case where be also suitable, in trunk optical fiber 200 close to 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 include the second add-drop multiplexer AD620, the first splitter CS510 and third add-drop multiplexer
AD630。
Fourth embodiment
With reference to Fig. 4, the difference of the present embodiment and first embodiment is, in trunk optical fiber 200 close to 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 issues enters the
It is propagated in trunk optical fiber 200 after the signal light multiplexing that one add-drop multiplexer AD610 and local side wavelength division multiplexer B300 is exported.
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 are the second WDM device, the first splitter CS510 and third add-drop multiplexer
AD630 constitutes optical transport unit.
In the present embodiment, the first splitter CS510 is power splitter.
According to above content it is found that the present embodiment also has the effect of first embodiment.In addition, the present embodiment is for local side
Wavelength division multiplexer B300 be not provided with detection optical channel the case where be also suitable, in trunk optical fiber 200 close to 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 optical time domain reflectometer 400 and the first add-drop multiplexer
AD610, the second supply unit include distal end wavelength division multiplexer R300, the first splitter CS510 and third add-drop multiplexer
AD630。
5th embodiment
Referring to figs. 1 to Fig. 5, the present embodiment and the difference of the first, second, third and fourth embodiment are, the network system of the present embodiment
It include two trunk optical fibers 200A and 200B, third splitter CS530 in system, third splitter CS530 is photoswitch, local side wave
Division multiplexer B300A is equipped on detection optical channel PB0, trunk optical fiber 200B and is provided with the first add-drop multiplexer AD610.Light time
The detection light that domain reflectometer 400 issues is switched to the detection optical channel of local side wavelength division multiplexer B300A through third splitter CS530
PB0 is upper or the first add-drop multiplexer AD610 on.
As described above, the detection light that optical time domain reflectometer 400 issues is sent to by a third splitter CS530
On local side wavelength division multiplexer B300A or on the first add-drop multiplexer AD610, to can be examined with an optical time domain reflectometer 400
The network system for there are two trunk optical fibers is surveyed, resource is saved, reduces cost.
The present embodiment also has the effect of the first, second, third and fourth embodiment.
In the present embodiment, the first supply unit includes optical time domain reflectometer 400, third splitter CS530, local side wavelength-division
Multiplexer B300A and the first add-drop multiplexer AD610, the second supply unit include distal end wavelength division multiplexer R300, the first branch
Device CS510, the second add-drop multiplexer AD620 and third add-drop multiplexer AD630.
In the present embodiment, the first splitter CS510 is power splitter.
First embodiment is illustrated above, but the present embodiment there can also be the form of some modifications, such as:
The quantity of trunk optical fiber in network system is at two or more；
The quantity of detector is greater than two and/or the quantity of third splitter is greater than two；
Third splitter CS530 can also use power splitter, and the detection light that optical time domain reflectometer 400 issues is through third branch
Device CS530 is transferred on the detection optical channel PB0 and the first add-drop multiplexer AD610 of local side wavelength division multiplexer B300A, thus with
One optical time domain reflectometer 400 can detect the network system of two or more trunk optical fibers simultaneously；
Distal end wavelength division multiplexer can be not provided with detection optical channel, correspondingly, in trunk optical fiber close to distal end wavelength division multiplexer
Position on install an add-drop multiplexer.
Sixth embodiment
With reference to Fig. 6, the mobile forward pass network system of passive wavelength-division in the present embodiment includes three trunk optical fibers, is respectively
A200, B200 and C200 further include light extractor, first order light shifter 720, wavelength division multiplexer 730, second level light shifter
740, detection device 1100 and terminal 900.Light extractor from trunk optical fiber for extracting light, in the present embodiment, power splitter
710 be light extractor.
First order light shifter 720 is a photoswitch, for controlling the output of light.
Second level light shifter 740 is also a photoswitch, for controlling the output of 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.
A power splitter 710 is separately installed in 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 passes through wave
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 selects
The light of some wavelength is exported to selecting property to detection device 1100.
According to above content it is found that when network system is run, the control first order light shifter 720 of terminal 900 selects a certain
Trunk optical fiber, control second level light shifter 740 then select a certain wavelength, and detection device 1100 can receive certain trunk optical fiber
Some wavelength light.In this way, all signal lights in network can be detected in local side B100.By dividing signal light
Analysis can detecte out the various failures in network, such as the time delay and jitterbug of signal transmission.Especially work as detection device
When 1100 use wireless protocols analyzer, wireless signal can be detected in local side B100, avoid operation on unnecessary tower,
The problems such as to the interference of quick detection noise.
In addition, being used cooperatively with the detection device being made 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 network management remover apparatus event of equipment own communication device BBU and/or RRU
Barrier, excludes signal light and wireless signal failure with detection device 1100, excludes optical fiber chain with detector (optical time domain reflectometer 400)
Road failure, can comprehensive and accurate positioning failure ensure communication quality to quickly repair.
With reference to Fig. 6, in the present embodiment, third 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 there can also be the form of some modifications, such as:
Light extractor can also be add-drop multiplexer；
The technical solution of the present embodiment can also be combined with the technical solution of the 5th embodiment.
7th embodiment
With reference to Fig. 7, the difference of the present embodiment and sixth embodiment is, further includes the second splitter CS520, the second branch
There are two output end, second level light shifters 740 to increase a channel for device CS520 tool.In the present embodiment, the second splitter
CS20 is power splitter.
Light is emitted from first order light shifter 720, into the second splitter CS520 after be divided into two-way light, light all the way
It is output to wavelength division multiplexer 730, another way light output to second level light shifter 740.
Light extractor, i.e. power splitter 710, the signal light for extracting a certain trunk optical fiber are sent into first order light shifter 720, eventually
The signal light of certain trunk optical fiber is sent into the second splitter CS520 by 900 control first order light shifter 720 of end, and signal light is not
By wavelength division multiplexer 730, it directly is output to second level light shifter 740 from the second splitter CS520, detection device 1100 can
To receive the not demultiplexed signal light of certain trunk optical fiber.If the signal light warp exported from the second splitter CS520
Wavelength division multiplexer 730 is crossed, then controls second level light shifter 740 then and the signal light of a certain wavelength, detection device 1100 may be selected
The signal light of some wavelength of certain trunk optical fiber can be received.It, can be quick by checking the spectrum of whole signal lights
The power and wavelength of whole signal lights is detected, to realize quickly lookup failure and improve communication quality.
With reference to Fig. 7, in the present embodiment, third supply unit includes power splitter 710, first order light shifter 720, second
Splitter CS520, wavelength division multiplexer 730 and second level light shifter 740.
First embodiment is illustrated above, but the present embodiment there can also be the form of some modifications, such as:
Second splitter CS520 can have at least three channels, correspondingly, second level light shifter 740 is further added by one
Channel；
With reference to Fig. 8, the second splitter CS520 is replaced with a third level light shifter 750.
8th embodiment
With reference to Fig. 6 to Fig. 9, the present embodiment and the difference of the six, the seven embodiments are, wavelength division multiplexer 730 is thick with one
Wavelength division multiplexer 731 and a dense wave division multiplexer 732 replace.
The present embodiment is suitable for backbone transport by the way of coarse wavelength division multiplexing and dense wave division multipurpose mixing.Light extraction
Device, i.e. power splitter 710, the signal light for extracting a certain trunk optical fiber are sent into first order light shifter 720.Wherein, coarse wavelength division multiplexing
Signal light by first order light shifter 720 be sent into Coarse Wave Division Multiplexer 731 in demultiplex after, into second level light shifter
740.The signal light 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 output on dense wave division multiplexer 732, after being demultiplexed by dense wave division multiplexer 732, from dense wave division multiplexer 732
Corresponding wavelength port be output to second level light shifter 740.
As described above, Coarse Wave Division Multiplexer 731 and dense wave division multiplexer 732 cooperate, even if passing on main line
It is defeated middle by the way of coarse wavelength division multiplexing and dense wave division multipurpose mixing, network can also be detected.
In the present embodiment, third supply unit includes power splitter 710, first order light shifter 720, Coarse Wave Division Multiplexer
731, dense wave division multiplexer 732 and second level light shifter 740.
9th embodiment
With reference to Fig. 6 and Figure 10, the difference of the present embodiment and sixth embodiment is, the network system in the present embodiment includes
Two two-stage switch 700, two two-stage switch 700 can share a detection device 1100.
One two-stage switch acquires the uplink signal light of three trunk optical fibers, another then acquires downlink signal light；Or
One two-stage switch of person acquires the half signal light of three trunk optical fibers, another then acquires the other half signal light.In this way, adopting
At least signal light of the two-way from two-stage switch can be detected simultaneously with same detection device 1100, including uplink signal light,
Downlink signal light, certain main line half signal light.
It, can according to above content it is found that carry out while detecting by signal light of two two-stage switch to trunk optical fiber
To reduce the detection time of half, failure that can quickly in Network Search.
First embodiment is illustrated above, but the present embodiment there can also be 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；
The photoswitch there are two the above output channel can be selected in second level light shifter 740, accordingly increases detection device,
The corresponding detection device of each output channel of second level light shifter 740, can be further reduced detection time in this way.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (9)
1. a kind of mobile forward pass network system of passive wavelength-division, which is characterized in that including local side, distal end and trunk optical fiber, further include
Detector, the first WDM device, the second WDM device, optical transport unit, reflector；The capable of emitting inspection of detector
Survey light, can form optical path between the detector and first WDM device, one end of the trunk optical fiber with it is described
The connection of first WDM device, the other end of the trunk optical fiber are connect with second WDM device, and the light passes
Send unit that can will test each branch that light is sent to the distal end from the output end of second WDM device, it is described anti-
The end of each branch of the distal end is arranged in emitter；It further include two-stage switch and detection device, the two-stage switch
Including light extractor, first order light shifter, wavelength division multiplexer and second level light shifter, the light extractor is mounted on described
In trunk optical fiber, the first order light shifter receives the light of light extractor output, and the wavelength division multiplexer is described the
Light is transmitted between level-one light shifter and the second level light shifter, the detection device receives the second level light shifter
Whether the light of output, the detection device detectable signal light have exception.
2. the mobile forward pass network system of passive wavelength-division as described in claim 1, which is characterized in that further include the second splitter or
Third level light shifter, the wavelength division multiplexer receive described the by second splitter or the third level light shifter
The light of level-one light shifter output, the second level light shifter receive the light or the third level that second splitter exports
The light of light shifter output.
3. the mobile forward pass network system of passive wavelength-division as described in claim 1, which is characterized in that the wavelength division multiplexer is with slightly
Wavelength division multiplexer and the dense wave division multiplexer for receiving the light that the Coarse Wave Division Multiplexer exports replace, the first order light switching
Light output to the Coarse Wave Division Multiplexer, the second level light shifter reception are emitted by device from the dense wave division multiplexer
Light.
4. the mobile forward pass network system of passive wavelength-division as described in any one of claims 1-3, which is characterized in that the two-stage is cut
The quantity of parallel operation is two or more；One two-stage switch acquires the uplink signal of the trunk optical fiber, and one described two
Grade switch acquires the downlink signal of the trunk optical fiber；Or a two-stage switch acquires the one of the trunk optical fiber
Half signal, a two-stage switch acquire the other half signal of the trunk optical fiber.
5. the mobile forward pass network system of passive wavelength-division as described in any one of claims 1-3, which is characterized in that further include at least
One terminal, the terminal are connect with the two-stage switch and/or the detection device, the capable of emitting alarm letter of terminal
Number.
6. the mobile forward pass network system of passive wavelength-division as described in claim 1, which is characterized in that the first wavelength-division multiplex dress
It is set to the local side wavelength division multiplexer for being equipped with detection optical channel, or the local side wavelength division multiplexer and the by being not provided with detection optical channel
One add-drop multiplexer is constituted；Second WDM device is the distal end wavelength division multiplexer equipped with detection optical channel, Huo Zheyou
The distal end wavelength division multiplexer and the second add-drop multiplexer for being not provided with detection optical channel are constituted；The optical transport unit includes first point
Road device and third add-drop multiplexer, first splitter can be in second WDM devices and the third add drop multiplex
Light is extracted between device, the third add-drop multiplexer is arranged on the branch road of the distal end.
7. the mobile forward pass network system of passive wavelength-division as claimed in claim 6, which is characterized in that it further include third splitter,
After the light travels to the third splitter that the detector issues, it is transferred to the detection light of local side wavelength division multiplexer
On channel and/or on first add-drop multiplexer, the quantity of the detector is at least one, the number of the third splitter
Amount is at least one.
8. a kind of mobile forward pass network system of passive wavelength-division, which is characterized in that including local side, distal end and trunk optical fiber, further includes:
First supply unit is transported to the trunk optical fiber for will test light in one end of the trunk optical fiber；Second supply unit,
For will test each branch that light is transferred to from the trunk optical fiber distal end in the other end of the trunk optical fiber；Reflection
The end of each branch in the distal end is arranged in, for reflecting detection light in device；By making detection light be transmitted to each through main line
It is whether faulty to detect network through backtracking behind the end on road；It further include third supply unit and detection device, described
Three supply units are used to the signal light of the signal light of different trunk optical fibers and/or different wave length being transferred to the detection device,
The detection device is for detecting whether signal light has exception；By from extracting all signal in network in the trunk optical fiber
Whether light is faulty to detect network；The third supply unit includes two-stage switch, and the two-stage switch includes that light mentions
Device, first order light shifter, wavelength division multiplexer and second level light shifter are taken, the light extractor is mounted on the trunk optical fiber
On, the first order light shifter receives the light of the light extractor output, and the wavelength division multiplexer is cut in the first order light
Light is transmitted between parallel operation and the second level light shifter, the detection device receives the second level light shifter output
Light.
9. the mobile forward pass network system of passive wavelength-division as claimed in claim 8, which is characterized in that further include the second splitter or
Third level light shifter, the wavelength division multiplexer receive described the by second splitter or the third level light shifter
The light of level-one light shifter output, the second level light shifter receive the light or the third level that second splitter exports
The light of light shifter output.
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| 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 |
| CN109150300B (en) * | 2018-07-26 | 2021-03-05 | 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-channel digital signal optical fiber transmission testing equipment |
| CN112054868B (en) | 2019-06-06 | 2021-11-19 | 中国移动通信有限公司研究院 | Optical module, management and control information processing method and communication system |
| CN112054841A (en) * | 2019-06-06 | 2020-12-08 | 中国移动通信有限公司研究院 | Active module, mobile communication forwarding system and mobile communication forwarding control method |
| 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 |
| 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 |
| 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 |
| CN110505008B (en) * | 2019-08-16 | 2020-09-22 | 杭州初灵信息技术股份有限公司 | Wavelength division multiplexing perception protection system and method applied to 5G fronthaul |
| 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 |
| CN114124205B (en) * | 2020-08-31 | 2023-03-28 | 中国电信股份有限公司 | Fronthaul wavelength division link and fault detection method and system thereof |
| CN112865913B (en) * | 2021-01-20 | 2023-03-28 | 重庆邮电大学 | Amplified saturated RSOA light source device based on mobile forward transmission |
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