CN107371072A - A kind of optical line terminal with many reference amounts on-line monitoring function - Google Patents
A kind of optical line terminal with many reference amounts on-line monitoring function Download PDFInfo
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- CN107371072A CN107371072A CN201710645134.2A CN201710645134A CN107371072A CN 107371072 A CN107371072 A CN 107371072A CN 201710645134 A CN201710645134 A CN 201710645134A CN 107371072 A CN107371072 A CN 107371072A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 158
- 238000012544 monitoring process Methods 0.000 title claims abstract description 49
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 239000013307 optical fiber Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
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- 239000000243 solution Substances 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000000253 optical time-domain reflectometry Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
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Abstract
The present invention provides a kind of optical line terminal with many reference amounts on-line monitoring function, blower module including cabinet and positioned at cabinet inside, power module, master control borad, upper connective plate, business board, back panel connector, laser, first coupler, intensity modulator, circulator, photoswitch, second coupler, parsing module, data acquisition and procession plate, control unit, wavelength division multiplexer and fibre circuit, by wavelength division multiplexer by communicating light signal and Brillouin scattering optical signal injection fibre circuit simultaneously, and inversely demodulate communicating light signal and Brillouin scattering optical signal, finally while communication task is completed, realize the dampening information of optical fiber, temperature information and the on-line monitoring of stress information along the line.The present invention uses Brillouin light time domain reflection technology, and more multi-environmental parameter can be drawn after obtained multiple parameters are carried out into operational analysis, is that line switching, bandwidth allocation of optical line terminal etc. provide data supporting.
Description
Technical field
The present invention relates to communication technical field, and in particular to a kind of optical link with many reference amounts on-line monitoring function is whole
End.
Background technology
Optical line terminal (optical line terminal, OLT) is the important component of EPON, and it is logical
Optical Distribution Network is crossed to communicate with optical network unit.Optical line terminal sends Ethernet data to optical network unit with broadcast mode,
The time slot and transmission window for the transmission data that optical network unit then configures according to optical line terminal transmit data to optical line terminal.
The administrative unit of optical line terminal monitors optical line terminal equipment and the up luminous power of port status, optical network unit in real time,
It is out-of-limit or when being diagnosed to be optical link failure to there is up luminous power, carries out line switching in time.
In order to improve the reliability of EPON and lift the intelligence degree of network.Industry starts optical time domain is anti-
(Optical Time Domain Reflectometer, OTDR) technology is penetrated to apply in fibre circuit monitoring.Realize at present
Hand-held optical time domain reflectometer carries out offline inspection, or is detected installed in ad-hoc location according to application scenarios, but due to not
The problems such as asynchronous, time delay is big with the incompatibility or communication clock of communication protocol between product, can not real time on-line monitoring light
Fiber communication situation and timely reporting fault.And current optical fiber state on_line monitoring uses standby fibre core in optical fiber cable more, no
Suitable for the occasion of no standby fibre core.
Application No. 201210586840.1 discloses a kind of optical line terminal OLT, is configured as performing optical time domain reflection
To position the interruption in passive optical network PON, the OLT includes technology OTDR：PON controllers, it is configured as by PON to light net
The transmission economize on electricity of network unit ONU starts order so that ONU is placed in into energy-saving mode；And OTDR modules, it is configured as impulses injection
PON simultaneously analyzes the signal reflected by PON from injected pulse to position the interruption in PON, wherein, connect receiving ONU
Started by economize on electricity and ordered and after the instruction in energy-saving mode, OTDR modules are by impulses injection PON.Although the OLT being capable of week
Phase property or intermittent ONU is placed in after energy-saving mode carry out OTDR tests again, but the OLT needs the extra time slot that takes could be
The communication of All other routes is not influenceed while monitoring, reduces system traffic rate, and when ONU quantity is more in PON system,
It is difficult to ensure that OTDR detection cycle is synchronous with ONU switching cycle.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of light with many reference amounts on-line monitoring function
Road terminal, connect provided with cabinet with the blower module positioned at cabinet inside, power module, master control borad, upper connective plate, business board, backboard
Connect device, laser, the first coupler, intensity modulator, circulator, photoswitch, the second coupler, parsing module, data acquisition
With process plate, control unit, wavelength division multiplexer and fibre circuit, while master control borad is provided with administrative unit, and upper connective plate is provided with the first line of a couplet
Expanded metals mouth or upper connective plate optical port, and business board is provided with optical module, by wavelength division multiplexer by communicating light signal and Brillouin scattering
Optical signal injection fibre circuit, and inversely demodulate communicating light signal and Brillouin scattering optical signal simultaneously, finally complete to lead to
While trusting business, the on-line monitoring of the dampening information of optical fiber, temperature information along the line and stress information is realized.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：
The present invention provides a kind of optical line terminal with many reference amounts on-line monitoring function, including cabinet and in cabinet
The blower module in portion, power module, master control borad, upper connective plate, business board, back panel connector, laser, the first coupler, intensity
Modulator, circulator, photoswitch, the second coupler, parsing module, data acquisition and procession plate, control unit, wavelength division multiplexer
And fibre circuit；
The power module, blower module, master control borad, upper connective plate and business board are connected with back panel connector, the master
Control plate is provided with administrative unit, and the upper connective plate is provided with upper connective plate network interface or upper connective plate optical port, and the business board is provided with optical module；Institute
State the first port of optical module access wavelength division multiplexer, the second end of the second port access wavelength division multiplexer of the photoswitch
Mouthful, the 3rd port of the wavelength division multiplexer passes through fibre circuit connecting optical network unit；
The output end of the laser connects the input of the first coupler, and the first output end of first coupler connects
The input of intensity modulator is connect, its second output end connects the first input end of the second coupler；The intensity modulator
Output end accesses the first port of circulator, the first port of the second port connection photoswitch of the circulator, its 3rd end
Second input of mouthful the second coupler of connection, the output end of second coupler by parsing module connect data acquisition with
Process plate, the data acquisition and procession plate are connected with control unit again, the output end connecting laser of described control unit
Input.
The power business signal that the upper connective plate is issued by upper connective plate network interface or upper connective plate optical port reception backbone network, and lead to
Cross back panel connector and power business signal is sent to master control borad, the master control borad is again believed power business by back panel connector
Number broadcast to optical module, power business signal is converted to communicating light signal by the optical module, and communicating light signal is sent to
Wavelength division multiplexer, the light pulse that the communicating light signal and photoswitch that the wavelength division multiplexer is sent to optical module are sent carry out multiplex
Optical signal is obtained, and optical signal injection fibre circuit, the fibre circuit are sent optical signals into optical network unit.
The wavelength division multiplexer receives the optical signal that optical network unit uploads through fibre circuit, and optical signal is demodulated
Communicating light signal and Brillouin scattering optical signal are obtained, and communicating light signal and Brillouin scattering optical signal are respectively sent to light
Module and photoswitch；The optical module receives the communicating light signal for coming from wavelength division multiplexer, and communicating light signal is converted to
Power business signal is uploaded to master control borad, the master control borad pair by power business signal, the business board by back panel connector
Power business signal is sent to upper connective plate by back panel connector again after being converged, the upper connective plate by upper connective plate network interface or
Power business signal is uploaded to backbone network by upper connective plate optical port.
The laser that the laser is sent is divided into two-way through the first coupler, wherein laser is modulated through intensity modulator all the way
Into light pulse, another way laser accesses the second coupler；The first port of the light pulse access circulator, the circulator
Light pulse is accessed photoswitch by second port；The photoswitch by the second port of Brillouin scattering optical signal access ring shape device,
The Brillouin scattering optical signal accesses the second coupler by the 3rd interface of circulator again；
Second coupler makes the laser of access and Brillouin scattering signal coherence produce envelope information, and by envelope
Information is exported to parsing module.
The parsing module includes photodetector, frequency mixer, microwave source and wave filter；
The envelope information that second coupler exports is converted to Brillouin's radiofrequency signal by the photodetector, and by cloth
Deep radiofrequency signal accesses frequency mixer；The microwave source sends RF local oscillator signal, and RF local oscillator signal is accessed into frequency mixer；Institute
State frequency mixer to be mixed Brillouin's radiofrequency signal and local oscillated signal, obtain baseband signal, the baseband signal passes through
Data acquisition and procession plate is accessed after filter filtering.
The data acquisition and procession plate is handled the baseband signal of access, is obtained on optical fiber attenuation information, temperature
The three-dimensional curve of information and strain information is spent, and three-dimensional curve is uploaded to control unit.
Described control unit issues laser control information to laser, for controlling the frequency of laser output laser and strong
Degree；
LED pulse control information is to intensity modulator under described control unit, for controlling intensity modulator output light arteries and veins
The intensity of punching；
Described control unit issues link control message optical switch, for controlling the circuit switching of photoswitch；
Described control unit issues the first configuration information and gives data acquisition and procession plate, gathers and handles for control data
Plate.
The circuit of the optical module, wavelength division multiplexer and photoswitch is respectively equipped with multiple, and the number of optical module, wavelength-division are multiple
Bar number with the number of device, the circuit number of photoswitch and fibre circuit is equal.
The blower module includes the first blower module and the second blower module, and first blower module and the second wind
Fan module receives the adjustment of rotational speed information that administrative unit is issued by back panel connector, and is turned according to the adjustment of adjustment of rotational speed information
Speed；
The power module includes the first power module and second source module using distribution -48V power supplies.
First blower module, the second blower module, the first power module, second source module, master control borad, upper connective plate
Assembled in the chassis by clamp rail with business board, support hot plug；
The cabinet selects metal plate frame structure.
The master control borad is additionally provided with environmental monitoring serial ports, configuration serial ports and webmaster port；
The administrative unit monitor in real time blower module, power module, environmental monitoring serial ports, configuration serial ports, webmaster port,
Upper connective plate network interface, upper connective plate optical port, the respective status information of fibre circuit, the status information of the fibre circuit include break-make shape
State and the luminous power of transmission, and the administrative unit receives the monitoring information that reports of described control unit and fault alarm information
Meanwhile the second configuration information is also issued to control unit.
The upper connective plate network interface selects 1000BASE-T interfaces；
The upper connective plate optical port selects 1000BASE-LX interfaces；
The environmental monitoring serial ports and configuration serial ports select RS232 interface；
10/100BASE-T interfaces are selected in the webmaster port.
The master control borad, upper connective plate and business board use MPC8247 chips.
The wave-length coverage of the communicating light signal in the upstream direction is 1260nm~1360nm, and it is in the downstream direction
Wave-length coverage is 1480nm~1500nm.
Compared with immediate prior art, technical scheme provided by the invention has the advantages that：
Optical line terminal provided by the invention is provided with cabinet and the blower module, power module, master control positioned at cabinet inside
Plate, upper connective plate, business board, back panel connector, laser, the first coupler, intensity modulator, circulator, photoswitch, the second coupling
Clutch, parsing module, data acquisition and procession plate, control unit, wavelength division multiplexer and fibre circuit, while master control borad is provided with pipe
Unit is managed, upper connective plate is provided with upper connective plate network interface or upper connective plate optical port, and business board is provided with optical module, will be logical by wavelength division multiplexer
Believe optical signal and Brillouin scattering optical signal injection fibre circuit, and inversely demodulate communicating light signal and Brillouin scattering simultaneously
Optical signal, finally while communication task is completed, while normal traffic communication is not influenceed, realize to believing including decay
The on-line monitoring of multiple parameters such as breath, temperature information along the line and stress information；
Optical line terminal provided by the invention need not additionally take time slot not influenceing other lines while monitoring
The communication on road, the traffic rate of optical line terminal is improved, and the detection cycle and optical-fiber network list of optical time domain reflection can be ensured
The switching cycle of member is synchronous；
Optical line terminal provided by the invention can solve system coordination, compatibility issue, control therein before dispatching from the factory
The failure of unit processed can be reported quickly, and the administrative unit of master control borad can react rapidly；
Optical line terminal provided by the invention is provided with photoswitch, is realized by the switching of photoswitch to multi-channel optical fibre circuit
Detection, improves monitoring coverage, also improves the utilization rate of laser, and finally reduce monitoring cost；
Communicating light signal is adjusted with Brillouin scattering optical signal by wavelength division multiplexer in optical line terminal provided by the invention
After system and demodulation on same fibre circuit, fibre circuit is connected with optical network unit, does not influence service communication, without setting in addition
Put spare fibre circuit；
Optical line terminal provided by the invention uses Brillouin light time domain reflection technology, by obtained dampening information, along the line
Temperature information and multiple parameters such as stress information carry out operational analyses after can draw more multi-environmental parameter, be optical line terminal
Line switching, bandwidth allocation etc. provide data supporting.
Brief description of the drawings
Fig. 1 is the optical line terminal structure chart for having in the embodiment of the present invention many reference amounts on-line monitoring function；
In figure, 1, cabinet, the 201, first blower module, the 202, second blower module, the 301, first power module, 302,
Two power modules, 4, back panel connector, 5, master control borad, 6, upper connective plate, 7, business board, 8, environmental monitoring serial ports, 9, configuration serial ports,
10th, webmaster port, 11, administrative unit, 12, upper connective plate network interface, 13, upper connective plate optical port, 1401~140n, the 1st~the n-th optical mode
Block, 15, control unit, 16, laser, the 1701, first coupler, the 1702, second coupler, 18, intensity modulator, 19, ring
Row device, 20, photoswitch, 21, photodetector, 22, frequency mixer, 23, microwave source, 24, wave filter, 25, data acquisition and procession
Plate, 2601~260n, the 1st~the n-th wavelength division multiplexer, 2701~270n, the 1st~the n-th road fibre circuit.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The embodiments of the invention provide a kind of optical line terminal with many reference amounts on-line monitoring function, it mainly includes machine
Case (1) and the first blower module (201), the second blower module (202), the first power module positioned at cabinet inside
(301), second source module (302), back panel connector (4), master control borad (5), upper connective plate (6), business board (7), environmental monitoring
Serial ports (8), configuration serial ports (9), webmaster port (10), administrative unit (11), upper connective plate network interface (12), upper connective plate optical port (13),
1st~the n-th optical module (1401~140n), control unit (15), laser (16), the first coupler (1701), the second coupling
Device (1702), intensity modulator (18), circulator (19), photoswitch (20), photodetector (21), frequency mixer (22), microwave
Source (23), wave filter (24), data acquisition and procession plate (25), the 1st~the n-th wavelength division multiplexer (2601~260n), the 1st~the
N roads fibre circuit (2701~270n)；
Wherein, administrative unit (11) is arranged on master control borad (5), and upper connective plate network interface (12) or upper connective plate optical port (13) are set
On upper connective plate (6), the 1st~the n-th optical module (1401~140n) is arranged on business board (7)；The first above-mentioned fan mould
Block (201), the second blower module (202), the first power module (301), second source module (302), master control borad (5), the first line of a couplet
Plate (6) and business board (7) are connected with back panel connector (4), access the 1st corresponding to the 1st~the n-th optical module (1401~140n)
The first port of~the n-th wavelength division multiplexer (2601~260n), i.e. the 1st optical module (1401) access the 1st wavelength division multiplexer
(2601) first port, i.e. the 2nd optical module (1402) access the first port of the 2nd wavelength division multiplexer (2602), by that analogy；
The second port of the 1st~the n-th wavelength division multiplexer (2601~260n) of access, i.e. light are opened corresponding to the second port of photoswitch (20)
The second port that the 1st article of circuit in (20) accesses the 1st wavelength division multiplexer (2601) by second port is closed, in photoswitch (20)
The 2nd article of circuit by second port access the 2nd wavelength division multiplexer (2602) second port, by that analogy；1st~the n-th ripple
Light is connected by the 1st~the n-th road fibre circuit (2701~270n) corresponding to 3rd port of division multiplexer (2601~260n)
NE, i.e. the 3rd port of the 1st wavelength division multiplexer (2601) pass through the 1st road fibre circuit (2701) connecting optical network list
Member, the 3rd port of the 2nd wavelength division multiplexer (2602) is by the 2nd road fibre circuit (2702) connecting optical network unit, class according to this
Push away；
The output end of above-mentioned laser (16) connects the input of the first coupler (1701), the first coupler (1701)
The first output end bonding strength modulator (18) input, the second output end of the first coupler (1701) connects the second coupling
The first input end of clutch (1702)；The first port of the output end access circulator (19) of intensity modulator (18), circulator
(19) first port of second port connection photoswitch (20), the 3rd port of circulator (19) connect the second coupler
(1702) the second input, the output end of the second coupler (1702) access frequency mixer (22) by photodetector (21),
Microwave source (23) also access frequency mixer (22) simultaneously, the output end of frequency mixer (22) by wave filter (24) connect data acquisition and
Process plate (25), data acquisition and procession plate (25) are connected with control unit (15) again, the output end connection of control unit (15)
The input of laser (16)..
During proper communication, in the downstream direction, above-mentioned upper connective plate (6) passes through upper connective plate network interface (12) or the first line of a couplet
Plate optical port (13) receives the power business signal that backbone network issues, and is transmitted power business signal by back panel connector (4)
To master control borad (5), master control borad (5) is again broadcasted power business signal to the 1st~the n-th optical module by back panel connector (4)
The power business signal each received is converted to communication by (1401~140n), the 1st~the n-th optical module (1401~140n) respectively
Optical signal, and respectively by itself conversion obtain communicating light signal is respectively sent to the 1st~the n-th wavelength division multiplexer (2601~
260n), the 1st~the n-th wavelength division multiplexer (2601~260n) is each sent to the 1st~the n-th optical module (1401~140n) respectively
Communicating light signal and the light pulse that sends of photoswitch carry out multiplex and obtain optical signal, and the optical signal phase that will each obtain respectively
The road fibre circuit (2701~270n) of injection the 1st~the n-th answered, the 1st~the n-th road fibre circuit (2701~270n) respectively will again
Optical signal therein is injected to send to optical network unit.
During proper communication, in the upstream direction, the 1st~the n-th wavelength division multiplexer (2601~260n) receives respectively
The optical signal that optical network unit uploads through the 1st~the n-th road fibre circuit (2701~270n), and to the 1st~the n-th road fibre circuit
The optical signal that (2701~270n) is each uploaded is demodulated to obtain communicating light signal and Brillouin scattering optical signal, will be corresponding
Communicating light signal is respectively sent to the 1st~the n-th optical module (1401~140n), while corresponding Brillouin scattering optical signal is sent out
Deliver to the respective lines of photoswitch (20)；1st~the n-th optical module (1401~140n) receives respectively comes from the 1st~the n-th wavelength-division
Multiplexer (2601~260n) respective communicating light signal, and communicating light signal is converted into power business signal, business respectively
Power business signal is uploaded to master control borad (5) by plate (7) by back panel connector (4), and master control borad (5) enters to power business signal
Upper connective plate (6) is sent to by back panel connector (4) again after row convergence, upper connective plate (6) passes through upper connective plate network interface (12) or the first line of a couplet
Power business signal is uploaded to backbone network by plate optical port (13).
The wave-length coverage of above-mentioned communicating light signal in the upstream direction is 1260nm~1360nm, and it is in the downstream direction
Wave-length coverage be 1480nm~1500nm.
Above-mentioned the first blower module (201) and the second blower module (202) redundancy are set, and the first blower module
(201) receive the adjustment of rotational speed that administrative unit (11) is issued by back panel connector (4) with the second blower module (202) and believe
Breath, and rotating speed is adjusted according to adjustment of rotational speed information；
Above-mentioned the first power module (301) and second source module (302) redundancy are set, and the first power module
(301) and second source module (302) uses distribution -48V power supply mode.
Above-mentioned the first blower module (201), the second blower module (202), the first power module (301), second source
Module (302), master control borad (5), upper connective plate (6) and business board (7) are assemblied in cabinet (1) by clamp rail, support hot plug,
Cabinet (1) therein selects metal plate frame structure.
Above-mentioned master control borad (5) is additionally provided with environmental monitoring serial ports (8), configuration serial ports (9) and webmaster port (10)；
Administrative unit (11) monitors the first blower module (201), the second blower module (202), the first power module in real time
(301), second source module (302), environmental monitoring serial ports (8), configuration serial ports (9) and webmaster port (10), upper connective plate network interface
(12), upper connective plate optical port (13), the 1st~the n-th road fibre circuit (2701~270n) respective status information, the therein 1st~
The status information of n-th road fibre circuit (2701~270n) includes the on off operating mode of corresponding fibre circuit and the luminous power of transmission,
And while the monitoring information that reports of administrative unit (11) reception control unit (15) and fault alarm information, also issue second and match somebody with somebody
Confidence is ceased to control unit (15).
Above-mentioned upper connective plate network interface (12) selects 1000BASE-T interfaces, and upper connective plate optical port (13) selects 1000BASE-LX
Interface, environmental monitoring serial ports (8) and configuration serial ports (9) select RS232 interface, and webmaster port (10) select 10/100BASE-T
Interface.And master control borad (5), upper connective plate (6) and business board (7) use MPC8247 chips, realize respective control function.
Optical line terminal concrete operating principle provided in an embodiment of the present invention with many reference amounts on-line monitoring function is as follows：
Control unit (15) issues laser control information and gives laser (16), for controlling laser (16) output laser
Frequency and intensity.The laser that laser (16) is sent is divided into two-way through the first coupler (1701), and the first coupler (1701) is defeated
The laser gone out is wherein modulated into light pulse through intensity modulator (18) all the way, and another way laser accesses the second coupler (1702)；
Light pulse is accessed photoswitch (20) by the first port of light pulse access circulator (19), the second port of circulator (19)；Light
The second port of Brillouin scattering optical signal access ring shape device (19), Brillouin scattering optical signal are passed through annular by switch (20) again
3rd interface of device (19) accesses the second coupler (1702)；Second coupler (1702) makes laser and the Brillouin scattering of access
Optical signal is relevant to produce envelope information, and envelope information is exported and gives photodetector (21), and photodetector (21) is by second
The envelope information of coupler output is converted to Brillouin's radiofrequency signal, and Brillouin's radiofrequency signal is accessed into frequency mixer (22)；It is micro-
Wave source (23) sends RF local oscillator signal, and RF local oscillator signal is accessed into frequency mixer (22)；Frequency mixer (22) will come from light
Brillouin's radiofrequency signal of electric explorer (21) is mixed with the local oscillated signal for coming from microwave source (23), obtains base band
Signal, and baseband signal is sent to wave filter (24) and is filtered, accessed by the filtered baseband signal of wave filter (24)
Data acquisition and procession plate (25).Data acquisition and procession plate (25) is handled the baseband signal of access, is obtained on light
The three-dimensional curve of fine dampening information, temperature information and strain information, and three-dimensional curve is uploaded to control unit (15).
Control unit (15) gives laser (16) except issuing laser control information, control laser (16) output laser
While frequency and intensity, control unit (15) also descends LED pulse control information to give intensity modulator (18), strong for controlling
Spend the intensity of modulator (18) output optical pulse；Furthermore control unit (15) issues link control message optical switch (20), use
In the circuit switching of control photoswitch (20)；Further, control unit (15) issue the first configuration information to data acquisition with
Process plate (25), for control data collection and process plate (25).
Optical line terminal provided in an embodiment of the present invention respectively will by the 1st~the n-th wavelength division multiplexer (2601~260n)
Communicating light signal injects the 1st~the n-th road fibre circuit (2701~270n) simultaneously with Brillouin scattering optical signal, and inversely demodulates
Go out communicating light signal and Brillouin scattering optical signal, finally while communication task is completed, do not influence normal traffic communication
While, realize the on-line monitoring to multiple parameters such as the temperature information including dampening information, along the line and stress information；
Optical line terminal provided in an embodiment of the present invention improves the traffic rate of optical line terminal, and when can ensure light
The detection cycle of domain reflection is synchronous with the switching cycle of optical network unit；Realized by the switching of photoswitch (20) to multi-channel optical fibre
The detection of circuit, improves monitoring coverage, also improves the utilization rate of laser, and finally reduces monitoring cost；
Above all optical line terminal provided in an embodiment of the present invention uses Brillouin light time domain reflection technology, will obtain
Multiple parameters such as dampening information, temperature information along the line and stress information carry out operational analyses after can draw more multi-environment ginseng
Number, it is that line switching, bandwidth allocation of optical line terminal etc. provide data supporting.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention embodiment modify or
Equivalent substitution, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent substitution
Within bright claims.
Claims (13)
1. a kind of optical line terminal with many reference amounts on-line monitoring function, it is characterised in that including cabinet and in cabinet
The blower module in portion, power module, master control borad, upper connective plate, business board, back panel connector, laser, the first coupler, intensity
Modulator, circulator, photoswitch, the second coupler, parsing module, data acquisition and procession plate, control unit, wavelength division multiplexer
And fibre circuit；
The power module, blower module, master control borad, upper connective plate and business board are connected with back panel connector, the master control borad
Provided with administrative unit, the upper connective plate is provided with upper connective plate network interface or upper connective plate optical port, and the business board is provided with optical module；The light
Module accesses the first port of wavelength division multiplexer, the second port of the second port access wavelength division multiplexer of the photoswitch, institute
The 3rd port for stating wavelength division multiplexer passes through fibre circuit connecting optical network unit；
The output end of the laser connects the input of the first coupler, and the first output end connection of first coupler is strong
The input of modulator is spent, its second output end connects the first input end of the second coupler；The output of the intensity modulator
The first port into circulator is terminated, the first port of the second port connection photoswitch of the circulator, its 3rd port connects
The second input of the second coupler is connect, the output end of second coupler connects data acquisition and procession by parsing module
Plate, the data acquisition and procession plate are connected with control unit again, the input of the output end connecting laser of described control unit
End.
2. the optical line terminal according to claim 1 with many reference amounts on-line monitoring function, it is characterised in that on described
The power business signal that yoke plate is issued by upper connective plate network interface or upper connective plate optical port reception backbone network, and will by back panel connector
Power business signal is sent to master control borad, and the master control borad is again broadcasted power business signal to optical mode by back panel connector
Block, power business signal is converted to communicating light signal by the optical module, and communicating light signal is sent into wavelength division multiplexer, institute
State the communicating light signal that wavelength division multiplexer sends to optical module and the light pulse that photoswitch is sent carries out multiplex and obtain optical signal, and
By optical signal injection fibre circuit, the fibre circuit sends optical signals to optical network unit.
3. the optical line terminal according to claim 1 with many reference amounts on-line monitoring function, it is characterised in that the ripple
Division multiplexer receives the optical signal that optical network unit uploads through fibre circuit, and optical signal is demodulated to obtain communicating light signal
With Brillouin scattering optical signal, and communicating light signal and Brillouin scattering optical signal are respectively sent to optical module and photoswitch；
The optical module receives the communicating light signal for coming from wavelength division multiplexer, and communicating light signal is converted into power business signal,
Power business signal is uploaded to master control borad by the business board by back panel connector, and the master control borad enters to power business signal
Upper connective plate is sent to by back panel connector again after row convergence, the upper connective plate is by upper connective plate network interface or upper connective plate optical port by electricity
Power service signal is uploaded to backbone network.
4. the optical line terminal according to claim 3 with many reference amounts on-line monitoring function, it is characterised in that described to swash
The laser that light device is sent is divided into two-way through the first coupler, wherein laser is modulated into light pulse through intensity modulator all the way, it is another
Road laser accesses the second coupler；The first port of light pulse access circulator, the second port of the circulator is by light
Pulse accesses photoswitch；The photoswitch dissipates the second port of Brillouin scattering optical signal access ring shape device, the Brillouin
Penetrate optical signal and the second coupler is accessed by the 3rd interface of circulator again；
Second coupler makes the laser of access and Brillouin scattering signal coherence produce envelope information, and by envelope information
Export to parsing module.
5. the optical line terminal according to claim 4 with many reference amounts on-line monitoring function, it is characterised in that the solution
Analysis module includes photodetector, frequency mixer, microwave source and wave filter；
The envelope information that second coupler exports is converted to Brillouin's radiofrequency signal by the photodetector, and Brillouin is penetrated
Frequency signal accesses frequency mixer；The microwave source sends RF local oscillator signal, and RF local oscillator signal is accessed into frequency mixer；It is described mixed
Brillouin's radiofrequency signal and local oscillated signal are mixed by frequency device, obtain baseband signal, and the baseband signal passes through filtering
Data acquisition and procession plate is accessed after device filtering.
6. the optical line terminal according to claim 5 with many reference amounts on-line monitoring function, it is characterised in that the number
The baseband signal of access is handled with process plate according to collection, obtained on optical fiber attenuation information, temperature information and strain letter
The three-dimensional curve of breath, and three-dimensional curve is uploaded to control unit.
7. the optical line terminal according to claim 6 with many reference amounts on-line monitoring function, it is characterised in that the control
Unit processed issues laser control information to laser, for controlling the frequency and intensity of laser output laser；
LED pulse control information is to intensity modulator under described control unit, for controlling intensity modulator output optical pulse
Intensity；
Described control unit issues link control message optical switch, for controlling the circuit switching of photoswitch；
Described control unit issues the first configuration information and gives data acquisition and procession plate, for control data collection and process plate.
8. the optical line terminal according to claim 1 with many reference amounts on-line monitoring function, it is characterised in that the light
The circuit of module, wavelength division multiplexer and photoswitch is respectively equipped with multiple, and the number of optical module, the number of wavelength division multiplexer, light
The circuit number of switch and the bar number of fibre circuit are equal.
9. the optical line terminal according to claim 1 with many reference amounts on-line monitoring function, it is characterised in that the wind
Fan module includes the first blower module and the second blower module, and first blower module and the equal reception pipe of the second blower module
The adjustment of rotational speed information that reason unit is issued by back panel connector, and rotating speed is adjusted according to adjustment of rotational speed information；
The power module includes the first power module and second source module using distribution -48V power supplies.
10. the optical line terminal according to claim 9 with many reference amounts on-line monitoring function, it is characterised in that described
First blower module, the second blower module, the first power module, second source module, master control borad, upper connective plate and business board are logical
Cross clamp rail assembling in the chassis, support hot plug；
The cabinet selects metal plate frame structure.
11. the optical line terminal according to claim 1 with many reference amounts on-line monitoring function, it is characterised in that described
Master control borad is additionally provided with environmental monitoring serial ports, configuration serial ports and webmaster port；
The administrative unit monitors blower module, power module, environmental monitoring serial ports, configuration serial ports, webmaster port, the first line of a couplet in real time
Expanded metals mouth, upper connective plate optical port, the respective status information of fibre circuit, the status information of the fibre circuit include on off operating mode and
The luminous power of transmission, and the administrative unit receives the same of the monitoring information that reports of described control unit and fault alarm information
When, the second configuration information is also issued to control unit.
12. the optical line terminal according to claim 11 with many reference amounts on-line monitoring function, it is characterised in that described
Upper connective plate network interface selects 1000BASE-T interfaces；
The upper connective plate optical port selects 1000BASE-LX interfaces；
The environmental monitoring serial ports and configuration serial ports select RS232 interface；
10/100BASE-T interfaces are selected in the webmaster port；
The master control borad, upper connective plate and business board use MPC8247 chips.
13. the optical line terminal with many reference amounts on-line monitoring function according to Claims 2 or 3, it is characterised in that institute
It is 1260nm~1360nm to state the wave-length coverage of communicating light signal in the upstream direction, and its wave-length coverage in the downstream direction is
1480nm~1500nm.
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