CN106411397A - Intelligent optical distribution network (ODN) device and passive optical network (PON) system - Google Patents
Intelligent optical distribution network (ODN) device and passive optical network (PON) system Download PDFInfo
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- CN106411397A CN106411397A CN201510448091.XA CN201510448091A CN106411397A CN 106411397 A CN106411397 A CN 106411397A CN 201510448091 A CN201510448091 A CN 201510448091A CN 106411397 A CN106411397 A CN 106411397A
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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]
Abstract
An intelligent ODN device disclosed by the present invention comprises a printed circuit board (PCB), an optical fiber adapter and an optical time domain reflect meter (OTDR), the PCB is equipped with an electronic label socket and a control chip, and the OTDR is connected with the optical fiber adapter and is in digital connection with the PCB. The optical fiber adapter is in optical fiber connection with an optical fiber plug at the inner side of the PCB and an optical fiber plug at the outer side of the PCB separately, and the OTDR is electrically connected with the control chip. The present invention also discloses a passive optical network system. According to the present invention, by integrating the OTDR in the intelligent ODN device, the passive optical fiber adapter and the active PCB are independent with each other, and on the basis of retaining the functions of the general ODN device and the passive characteristics, the OTDR monitoring function of the PON system is realized without needing to add the expensive light switches, thereby reducing the cost.
Description
Technical field
The present invention relates to optical-fiber network technical field, more particularly, to a kind of intelligent Optical Distribution Network device and passive
Optical fiber network system.
Background technology
With the development of Fibre Optical Communication Technology, passive optical-fiber network PON (Passive Optical Network)
Have been obtained for widely disposing as multi-plexing light accessing system.Passive optical-fiber network by optical line terminal (OLT,
Optical Line Terminal) system, optical network unit (ONU, Optical Network Unit) system
Constitute with three essential parts of Optical Distribution Network (ODN, Optical Distribution Network) system.
Optical Distribution Network ODN includes light distributor and optical fiber distribution apparatus.OLT subsystem and ONU subsystem lead to
Cross the OLT optical module in respective system and ONU optical module supports PON optical fiber link monitoring function, collection
Optical module performance indications, such as transmitting luminous power, received optical power, operating temperature, supply voltage, partially
Put electric current, optical link fault diagnosis etc..
In order to meet management service construction requirement further, passive optical-fiber network increases an OTDR newly in recent years
(Optical Time Domain Reflect meter, optical time domain reflection instrument system) system requirements.OTDR
It is backscattering produced by Rayleigh scattering and Fresnel reflection when transmitting in a fiber using light and make
The monitoring system becoming, it is widely used in the maintenance of lightguide cable link, can carry out fiber lengths, optical fiber
Transmission attenuation, joint decay and fault location etc. measurement.The side of existing newly-increased OTDR system requirements
It is broadly divided into two ways in case：
First method is centralized OTDR scheme, i.e. OTDR test instrumentation, accesses the optical cable breaking down
Tested.But, the needing of this mode sends attendant to scene, finds fault optical fiber, can
The business of transmission in energy optical fiber to be interrupted；And it also requires attendant arranges OTDR test instrumentation at the scene
Parameter, cleans optical fiber pigtail joint using alcohol swab, connects the extra works such as the flange of OTDR, especially
It is attendant it is noted that optical fiber connector articulation can not be seen, prevent ocular damage.
In order to overcome the obvious shortcoming of first kind of way centralized OTDR system it is proposed that the second way：
Distributed OTDR scheme, wherein distributed OTDR scheme is mainly included using the distributed OTDR of circumscribed
System carries out the technical scheme of trouble point detection and by distributed OTDR function collection to the optical fiber link of PON
Become in OLT optical module, using the OTDR function in optical module after repacking to this optical module place PON's
Optical fiber link carries out the technical scheme of trouble point monitoring.
With reference to Fig. 1, an external distributed OTDR system (for example distributed OTDR in PON system
System is separately provided, arranges single OTDR line card function trough etc. in the olt), but increased PON
The OTDR equipment placing space demand of system for field, OTDR power supply supply requirement, OTDR maintenance management
Demand.External distributed OTDR system must also have Ethernet first line of a couplet management interface and be connected to PON's
EMS (Element Management System, Element management system), for monitoring OTDR equipment shape
State, issues administration order, firmware updating program etc., causes this so-called external distributed OTDR system
More complicated than common OTDR system architecture.And in PON system, increased price ratio OTDR system price at present
Also want expensive photoswitch so that this solution is relatively costly.
With reference to Fig. 2, distributed OTDR function is integrated in OLT optical module, but, this needs to consider
There is the OLT PON optical module of OTDR function than common OLT PON optical module power consumption greatly, volume is big.Transformation
To consider during existing tradition OLT system can whether OLT power source loads fall volume meet driving and have OTDR work(
The OLT PON optical module power consumption requirements of energy.Can transformation scene meet insertion larger volume OTDR function
OLT PON optical module steric requirements.There are the OLT PON optical module of OTDR function and common OLT
PON optical module hardware interface various optical module supplier model may not phase with the definition of OLT line card hardware pins
Same, not necessarily can directly replace.And this scheme needs the software system of existing tradition OLT system that upgrades
System, in order to make existing tradition OLT system support the OLT PON optical module function of having OTDR function.
Common OLT PON optical module standardizes already, and batch production has the OLT PON optical module of OTDR function
The supplier supporting is few, and cost disadvantage substantially, only has a small amount of laboratory applications at present, be directed to existing
The OLT optical module of various standards, such as EPON, 10G EPON, GPON, 10G GPON etc. add one by one
Enter OTDR function and involve multiple professional standards tissue, OTDR specific implementation be difficult to unified, right
The integrated system planning of PON access system is unfavorable, and unified planning cost is excessive.
Content of the invention
Present invention is primarily targeted at providing a kind of Optical Distribution Network device and passive optical fiber network system,
Aim to solve the problem that ODN device increases the OLT that an OTDR system need to change existing network arrangement, solution party newly
Case is difficult to the unified, technical problem of high cost.
For achieving the above object, a kind of intelligent Optical Distribution Network ODN device that the present invention provides, described intelligence
Printing board PCB, fiber adapter and OTDR part can be included by Optical Distribution Network ODN device,
Described PCB is provided with electronic tag socket and control chip；Described OTDR part and described fiber adapters
Device optical fiber connects, the control chip electrical connection of described OTDR part and described PCB, and described optical fiber is fitted
Orchestration is connected with the inner fibers plug of described PCB and the outer fibers plug fibers of described PCB respectively.
Preferably, described intelligent ODN device also includes being arranged at described outer fibers plug electronic tag,
Described electronic tag is connected with the electronic tag socket on described PCB, described electronic tag socket with
Described control chip electrical connection.
Preferably, it is provided with wave multiplexer inside described fiber adapter, described OTDR part and described conjunction ripple
Device optical fiber connects, and described inner fibers plug and outer fibers plug are all connected with described wave multiplexer optical fiber.
Preferably, described wave multiplexer includes the first optical interface, the second optical interface and the 3rd optical interface, described
First optical interface is connected with described inner fibers plug fibers, and described second optical interface and described external side light connect
Mouth optical fiber connects, and described 3rd optical interface is connected with described OTDR component, fiber, described first optical interface
To the second optical interface optical carrier operating wavelength range and described first optical interface to the 3rd optical interface
Optical carrier operating wavelength range misaligned.
Preferably, described wave multiplexer is wavelength division multiplexer.
Preferably, described intelligent ODN device also includes fiber fusion matching plate, described fiber adapter, inner side
Optical fiber plug, OTDR part and PCB are arranged on inside fiber fusion matching plate, and described outer fibers plug sets
Put outside fiber fusion matching plate.
Preferably, described OTDR part is installed on described PCB.
Additionally, for achieving the above object, the present invention also provides a kind of passive optical-fiber network PON system, institute
State PON system and include OLT subsystem, ONU subsystem and above-mentioned intelligent ODN device, described
The inner fibers plug of intelligent ODN device is connected with the uplink optical fibers of the OLT subsystem being connected local side,
The outer fibers plug of described intelligent ODN device is connected with the downlink optical fiber of the ONU subsystem being connected far-end
Logical.
Additionally, for achieving the above object, the present invention also provides a kind of passive optical-fiber network PON system, institute
State PON system and include OLT subsystem, ONU subsystem and above-mentioned intelligent ODN device, described
The inner fibers plug of intelligent ODN device is connected with the downlink optical fiber of the ONU subsystem being connected far-end,
The outer fibers plug of described intelligent ODN device is connected with the uplink optical fibers of the OLT subsystem being connected local side
Logical.
Additionally, for achieving the above object, the present invention also provides a kind of passive optical-fiber network PON system, institute
State PON system and include OLT subsystem, ONU subsystem, light distributor and multiple above-mentioned intelligent ODN
Device, the inner fibers plug of described intelligent ODN device is descending with the ONU subsystem being connected far-end
Optical fiber connects, and the outer fibers plug of described intelligent ODN device is connected with described light distributor, described light
Distributor is connected with the uplink optical fibers of the OLT subsystem being connected local side.
The present invention by OTDR part is integrated in intelligent ODN device, i.e. OTDR part and light
Fine adapter optical fiber connects, and OTDR part is digital with PCB to be connected, and makes passive fiber adapter and active
PCB independently of one another, on the basis of retaining common intelligent ODN apparatus function and sourceless characteristic, realizes
The OTDR monitoring function of passive optical-fiber network PON system, need not additional expensive photoswitch, fall
Low cost；Existing OLT subsystem need not be changed, solution clear thinking and easy to implement, just
In unified management；And retain common intelligent ODN function, realize real-time monitoring optical fiber and run and fault
Situation, Maintenance free personnel on site intervenes, and saves operator's manpower and materials cost.
Brief description
Fig. 1 is the structural representation of the PON system of external distributed OTDR system in prior art；
Fig. 2 is the knot of the PON system of integrated distributed OTDR system in OLT optical module in prior art
Structure schematic diagram；
Fig. 3 is the structural representation of present invention intelligence ODN device first embodiment；
Fig. 4 is the structural representation of the second embodiment of present invention intelligence ODN device；
Fig. 5 is the structural representation of PON system first embodiment of the present invention；
Fig. 6 is the structural representation of present invention intelligence another implementation of ODN device 3rd embodiment；
Fig. 7 is the structural representation of PON system second embodiment of the present invention；
Fig. 8 is the structural representation of PON system 3rd embodiment of the present invention；
Fig. 9 is the structural representation of PON system fourth embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be done further in conjunction with the embodiments referring to the drawings
Explanation.
Specific embodiment
It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit
Determine the present invention.
The present invention provides a kind of intelligent ODN device, in the first embodiment of present invention intelligence ODN device
In, with reference to Fig. 3, this intelligent ODN device includes：(Printed Circuit Board prints electricity to PCB
Road plate) 10, fiber adapter 20 and OTDR part 50, described PCB 10 is provided with electronic tag and inserts
Seat 70 and control chip (not shown), described OTDR part 50 and described fiber adapter optical fiber
20 connections, the control chip electrical connection of described OTDR part 50 and described PCB 10, described optical fiber
Adapter 20 respectively with the inner fibers plug of described PCB 10 and the outer fibers plug of described PCB 10
Optical fiber connects.
The PCB 10 of intelligent ODN is provided with power supply, and OTDR part 50 is connected with PCB 10 numeral, from
And PCB 10 can provide required working power for OTDR part 50, OTDR part 50 is fitted with optical fiber
Orchestration 20 optical fiber connects (optical fiber connects and as connects terminal device by optical fiber), and fiber adapter 20
It is connected with inner fibers plug 30 and outer fibers plug 40 optical fiber respectively, so that fiber adapter 20
Keep sourceless characteristic, the core of intelligent ODN device will be divided into independent passive fiber adapter
20 and active PCB 10 two large divisions, simplify and have unified system design.Additionally, the OTDR of the present invention
Part 50 and control chip electrical connection, realize the communication between OTDR part 50 and control chip,
And OTDR part 50 realizes the (prison of the OTDR monitoring function to PCB 10 outer fibers or inner fibers
Brake includes the functions such as the measurement to optical fiber, monitor in real time, fault location), control chip accesses interconnection
Communicate with default Element management system in net, thus control chip is by the Monitoring Data of OTDR part 50
Reach Element management system and take corresponding measure for user.
The present invention passes through to scene with respect to OTDR scheme centralized in prior art, Maintenance free personnel
Complicated and easily damage eyes operational sequence is to fiber fault diagnosis and process.The present invention is with respect to external
Distributed OTDR scheme, need not increase OTDR equipment at optical fiber link malfunction monitoring point scene and put sky
Between, OTDR equipment power supply device, OTDR equipment managing device, particularly have a kind of external point
Cloth OTDR scheme：In the olt arrange a single OTDR line card function slot, by photoswitch,
OTDR equipment and OLT master control borad communication function are integrated on one piece of OTDR line card, realize to OLT
Descending optical fiber link carries out OTDR monitoring function, but this scheme needs OLT to reserve individually
OTDR free time groove position, wastes valuable OLT structure space, and structure and system design need change very big,
Not for the transformation of old OLT subsystem, and need also exist for expensive photoswitch.The present invention is relatively
In the scheme being integrated into OTDR in OLT optical module, OTDR part need not be made very small to adapt to
The space of OLT optical module limits, thus avoid OTDR part too small and lead to its transmission power too small and
Impact OTDR test effect；And need not be to the software systems of standardized OLT optical module and hardware
System is upgraded and is transformed, and greatlys save the implementation cost of scheme.
In the present embodiment, by being integrated in OTDR part 50 in intelligent ODN device, i.e. OTDR
Part 50 is connected with fiber adapter 20 optical fiber, and OTDR part 50 is connected with PCB 10 numeral, makes
Passive fiber adapter 20 and active PCB 10 independently of one another, are retaining common intelligent ODN device work(
On the basis of energy and sourceless characteristic, realize the OTDR monitoring function of passive optical-fiber network PON system, no
Need additional expensive photoswitch, reduce cost；Existing OLT subsystem need not be changed, solve
Scheme clear thinking and easy to implement, is easy to be managed collectively；And retain common intelligent ODN function,
Realize real-time monitoring optical fiber to run and failure condition, Maintenance free personnel on site intervenes, and saves operator
Manpower and materials cost.
Preferably, described intelligent ODN device also includes fiber fusion matching plate (not shown), and optical fiber is fitted
Orchestration 20, inner fibers plug 30, OTDR part 50 and PCB 10 are arranged on inside fiber fusion matching plate,
Described 40 outer fibers plugs are arranged on outside fiber fusion matching plate so that OTDR part 50 is easy to completely
The requirement of equipment electrostatic vulnerability to jamming in the sufficient communications industry, thus OTDR part 50 need not be carried out with electrostatic resist
Disturb the transformation of aspect, OTDR part 50 is arranged on PCB 10 simultaneously, available PCB 10 is carried out
Heat loss through conduction, thus reducing the hardware requirement to OTDR part 50, saves OTDR part 50
Cost.
Further, with reference to Fig. 4, on the basis of present invention intelligence ODN device first embodiment, carry
Go out intelligent ODN device second embodiment, in a second embodiment, described intelligent ODN device also includes
Be arranged at the electronic tag 60 of described outer fibers plug 40, described electronic tag 60 with located at described PCB
Electronic tag socket 70 on 10 connects, and described electronic tag socket 70 and described control chip electrically connect
Connect.
In the present embodiment, electronic tag 60 carries out unique mark to optical fiber, and electronic tag socket 70 is real
The function that now electronic tag 60 read and communicating with the control chip on PCB 10, thus realizing optical fiber
Information stores automatically, optical fiber connection relation information automatic identification, optical fiber resource information are calibrated, visualization is applied
The functions such as work guidance, and by OTDR part 50 and distributed OTDR technique, to each light
The functions such as fine realization measurement, monitor in real time, fault location, with existing system ratio it is not necessary to change existing
Arranged OLT and ONU of net, is suitable for the new intelligent ODN application scenarios built.
Further, with reference to Fig. 4, on the basis of present invention intelligence ODN device second embodiment, carry
Go out intelligent ODN device 3rd embodiment, in the third embodiment, inside described fiber adapter, be provided with conjunction
Ripple device 80, described OTDR part 50 is connected with described wave multiplexer 80 optical fiber, described inner fibers plug
30 and outer fibers plug 40 be all connected with described wave multiplexer 80 optical fiber.
In the present embodiment, wave multiplexer 80 be preferably WDM (Wavelength Division Multiplexing,
Wavelength division multiplexer, following WDM is with 10 marks), this WDM 80 is by outer fibers plug 40 and OTDR
The optical carrier of two kinds of different wave of part 50 transmission is combined with each other and is coupled to connection inner fibers
Transmit in the optical fiber link of plug 30, also the optical carrier partial wave that inner fibers plug 30 transmits is arrived
Outer fibers plug 40 and OTDR part 50；Or this WDM 80 is by inner fibers plug 30 He
The optical carrier of two kinds of different wave of OTDR part 50 transmission is combined with each other and is coupled to outside connection
Transmit in the optical fiber link of optical fiber plug 40, the optical carrier also outer fibers plug 40 being transmitted
Partial wave is to inner fibers plug 30 and OTDR part 50；Thus WDM 80 passes through the first operation wavelength
Optical carrier transmit OLT to ONU normal work passage fiber-optic signal or transmit ONU arrive
The fiber-optic signal of OLT normal work passage, WDM 80 is passed by the optical carrier of the second operation wavelength
The defeated fiber-optic signal to OTDR part 50, the first operation wavelength and the second operation wavelength are unequal, thus
Realize the fiber-optic signal of normal work passage and the transmission of the fiber-optic signal of OTDR part 50 simultaneously.
Preferably, described wave multiplexer 80 includes the first optical interface 81, the second optical interface 82 and the 3rd light and connects
Mouth 83, described first optical interface 81 is connected with described inner fibers plug 30 optical fiber, and described second light connects
Mouthfuls 82 are connected with described outside optical interface 40 optical fiber, described 3rd optical interface 83 and described OTDR part
50 optical fiber connect, the operation wavelength of the optical carrier of described first optical interface the 81 to the second optical interface 82
The operating wavelength range of scope and the optical carrier to the 3rd optical interface 83 for described first optical interface 81 is not
Overlap.
In the preferred embodiment, the second optical interface 82 to the first of wave multiplexer 80 (as wavelength division multiplexer)
The optical carrier operation wavelength of optical interface 81 or first optical interface the 81 to the second optical interface 82 is first
Operation wavelength (such as 1260～1587 nanometers) is normal for OLT to ONU or ONU to OLT
The signal transmission through fiber of service aisle, the 3rd optical interface the 83 to the first optical interface 81 of wave multiplexer 80 or
The optical carrier operation wavelength of the 3rd optical interface the 83 to the second optical interface 82 is the second operation wavelength (example
As 1615～1660 nanometers), for optical signal link OTDR detect, do not affect OLT to ONU or
The signal transmission through fiber of person's ONU to OLT normal work passage.
Further, with reference to Fig. 4, on the basis of present invention intelligence ODN device 3rd embodiment, institute
State inner fibers plug and the connection of the downlink optical fiber of the ONU subsystem being connected far-end, described outer fibers are inserted
Head is connected with the uplink optical fibers of the OLT subsystem being connected local side.
Include miniature WDM (wavelength division multiplexer) inside fiber adapter, realize optical fiber and close ripple and partial wave work(
Energy.The light of two kinds of different wave lengths that the second optical interface 82 and the 3rd optical interface 83 are received by wavelength division multiplexer
Carrier signal closes ripple together, and is coupled in the first optical interface 81 uplink optical fibers link and is transmitted.Ripple
Division multiplexer is also by the optical carrier partial wave of the first optical interface 81 to the 3rd optical interface and the second optical interface 82
It is transmitted in downlink optical fiber link.Wavelength division multiplexer carries up optical interface (i.e. first optical interface
81), and two descending optical interfaces (the second optical interface 82 and the 3rd optical interface 83).The outside of PCB 10
Optical fiber plug 40 inserts fiber adapter 20, and outer fibers pass through the second optical interface 82 and fiber adapter
Internal WDM wave multiplexer 80 connects.The inner fibers plug 30 insertion fiber adapter 20 of PCB 10,
Inner fibers are connected with the WDM wave multiplexer 80 within fiber adapter 20 by the first optical interface 81.
The other end the 3rd optical interface 83 and the OTDR part 50 being arranged on PCB 10 of wavelength division multiplexer 80
Connect, realize the OTDR function monitoring to outer fibers.Preferably, the second light of wavelength division multiplexer connects
The optical carrier operation wavelength of mouth to 52 interfaces is 1260～1587 nanometers, for OLT to ONU just
The often signal transmission through fiber of service aisle；3rd optical interface the 83 to the first optical interface 81 of wavelength division multiplexer
Optical carrier operation wavelength be 1615～1660 nanometers, for optical signal link OTDR detect,
Do not affect the signal transmission through fiber of OLT to ONU normal work passage.OTDR portion of the present invention
Part 50 monitors ONU to the optical fiber link state of intelligent ODN device by the 3rd optical interface 83, carries out
Fiber distance is tested, loss test, or return loss test, and is reported by digital communi- cations link
To the control chip analyzing and processing on PCB.
Electronic tag socket 70 on PCB 10 is led to by digital interface with the control chip on PCB 10
Letter.The outer fibers plug 40 insertion fiber adapter 20 of PCB 10, outer fibers plug 40 is bound
Electronic tag 60 insert electronic tag socket 70 on PCB 10, electronic tag 60 is inserted with electronic tag
Seat 70 contact, forms electrical connection.Electronic tag 60 is passed through digital interface further and is led to control chip
Letter, the information of control chip reading electronic labels 60 memory storage on PCB 10, realize light distribution plant tool
Some optical fiber connects, distributes and dispatches, and fiber port monitors, positioning is guided, electronic labeling information reading
Etc. function.
The light carrier letter of second optical interface the 82 to the first optical interface 81 of the wavelength division multiplexer 80 in the present invention
Number operation wavelength is (λ1～λ2) nanometer, can be according to the actual requirements to (λ1～λ2) be adjusted,
(λ1～λ2) nanometer wavelength range optical carrier be used for OLT to ONU normal work passage light
Optical fiber signaling transmits；The optical carrier of the 3rd optical interface the 83 to the first optical interface 81 of wavelength division multiplexer 80
Operation wavelength is (λ3～λ4) nanometer, can be according to the actual requirements to (λ3～λ4) be adjusted, (λ3～λ4) nanometer wavelength range optical carrier be used for optical signal link detecting, constraints is wavelength
(λ1～λ2) and (λ3～λ4) there is not coincidence scope.
In the present embodiment, OTDR part is arranged in the intelligent ODN device in the middle of PON system,
Shorten the measuring distance of ONU, reduce the luminous power size that OTDR part is launched with test signal
Requirement, that is, OTDR part effect also preferably can be tested with less optical signal launch power,
Such that it is able to be made OTDR part, less (volume of OTDR part can reach with this OTDR part
To maximum transmission power be directly proportional), thus contrasting the installation environment of OTDR part, requirements of installation space
Lower.
Additionally, with reference to Fig. 6 and Fig. 7, on the basis of present invention intelligence ODN device 3rd embodiment,
In another implementation of 3rd embodiment, described inner fibers plug and the OLT subsystem being connected local side
Uplink optical fibers connection, the downlink optical fiber company of described outer fibers plug and the ONU subsystem being connected far-end
Logical.
In the present embodiment, wavelength division multiplexer the first optical interface 81 and the 3rd optical interface 83 are received two
The optical carrier planting different wave length closes ripple together, and is coupled to the second optical interface 82 uplink optical fibers link
In be transmitted.Wavelength division multiplexer is also by the optical carrier partial wave of the second optical interface 82 to the 3rd optical interface
It is transmitted with the first optical interface 81 downlink optical fiber link.Wavelength division multiplexer carries a up optical interface
(i.e. the second optical interface 82), and two descending optical interfaces (the first optical interface 81 and the 3rd optical interface 83).
The outer fibers plug 40 insertion fiber adapter 20 of PCB 10, outer fibers pass through the second optical interface 82
It is connected with the WDM wave multiplexer 80 within fiber adapter.The inner fibers plug 30 of PCB 10 inserts
Fiber adapter 20, inner fibers pass through the first optical interface 81 and the WDM within fiber adapter 20
Wave multiplexer 80 connects.3rd optical interface 83 and the OTDR being arranged on PCB 10 of wavelength division multiplexer 80
Part 50 connects, and realizes the OTDR function monitoring to inner fibers.OTDR portion of the present invention
Part 50 monitors ONU to the optical fiber link state of intelligent ODN device by the 3rd optical interface 83, carries out
Fiber distance is tested, loss test, or return loss test, and is reported by digital communi- cations link
To the control chip analyzing and processing on PCB.
The present invention also provides a kind of passive optical-fiber network PON system, implements in described PON system first
In example, with reference to Fig. 4 and Fig. 5, this PON system includes OLT subsystem, ONU subsystem and above-mentioned
Intelligent ODN device, the inner fibers plug of described intelligent ODN device and OLT being connected local side
Uplink optical fibers connection, the outer fibers plug of described intelligent ODN device and the ONU being connected far-end of system
The downlink optical fiber connection of subsystem.
In existing scheme, distributed OTDR function is integrated in OLT optical module, using this optical module
In OTDR function the optical fiber link of this optical module place PON is carried out with the scheme of trouble point monitoring,
OLT optical module inner space is little, and the power of OTDR part is little, PON system as shown in Figure 2, from
OLT is through the distance of ODN to ONU, and will consume further through a lot of level optical branching devices
The small test optical signal power that the built-in OTDR part of OLT optical module is sent, causes OTDR to survey
Examination effect is poor.Using the PON system of the present invention, OTDR part is moved on to the ODN in the middle of PON system
In device, shorten the measuring distance of ONU.Even if with equally built-in in the OLT optical module of Fig. 2
OTDR part launch test signal luminous power size identical, the OTDR of Fig. 4 test effect than
The OTDR good test effect of Fig. 3.
Further, Fig. 2 scheme is because limited by OLT optical module inner space, OTDR part body
Amass and can only be made very small.The OTDR part of Fig. 5 scheme is only limited by the PCB surface area of Fig. 5,
OTDR piece volumes can be made bigger than Fig. 2 scheme.OTDR piece volumes and OTDR transmission power
It is directly proportional, Fig. 5 scheme OTDR transmission power is larger it can be seen that Fig. 5 scheme OTDR tests effect
Preferably.
Another kind of variation scheme close with Fig. 3, is installed to OTDR part inside fiber adapter.
This scheme needs OTDR part to be made very small, to adapt to the fiber adapter overall dimensions of routine.
But, built-in type miniature OTDR, because size limitation, or because transmitting luminous power is little, leads to measure
Dynamic range is less, needs the software algorithm of extra complexity to compensate；Need to increase image intensifer,
Increase hardware complexity.Further, often it is built in OTDR component failure in fiber adapter
The sourceless characteristic of rule fiber adapter.The fiber adapter of this scheme customization needs to increase for OTDR part
Plus extra communication interface, power interface, interface pin, each communication equipment supplies in optical communications industry
Answer business to be in respective commercial object to be difficult to coordinate to agree to pin definitions.And, OTDR part power consumption is relatively
Greatly, conventional fiber adapter shell is typically plastic material making, and heat dispersion is bad.If it is considered that OTDR
Part conduction pattern radiates, and contacts with metal making and with PCB in fiber adapter casing part region,
The equipment electrostatic vulnerability to jamming being then difficult to meet communications industry requirement requires.
Passive optical-fiber network PON system of the present invention has the characteristics that：
I) adopt the solution of the present invention, the OTDR part overall dimensions that PCB installs can it goes without doing
Very little, and because OTDR part portion in fiber fusion matching plate body, without special consideration electrostatic vulnerability to jamming
Require, reliability is high.
Ii) fiber adapter of the present invention only has optical interface, no electrical interface, optical interface the international standards organization standard generalized markup,
Production maintenance is convenient；And fiber adapter keeps sourceless characteristic, active in common intelligent ODN device
PCB is provided to the working power required for OTDR part in itself.Thus may be used in the core of the present invention
It is divided into independent passive fiber adapter and active PCB two large divisions, simplify and unified system design.
The active PCB part of the present invention, if there is fault, can directly take out PCB and change, not affect passive
The optical service signal of normal transmission in fiber adapter.Close with Fig. 3 variation scheme in prior art,
Because fiber adapter inner space limits OTDR number of modules, namely the number of fibers supported, than
As LC type fiber, the present invention no this restriction.
In the present embodiment, compared with existing system, using integrated distributed OTDR function and intelligence
ODN function is integrated it is not necessary to change existing OLT and ONU, retains common intelligent ODN work(
Unified EMS network management can be easy to it is adaptable to existing all PON access standard.Distributed
OTDR can be run and failure condition with real-time monitoring optical fiber, does not affect normal fiber optic communication business, need not
Attendant intervenes at scene, without using the photoswitch of additional expensive, saves operator's manpower and materials cost.
The present invention will make the ODN device in PON realize real intellectuality, complete Fiber Identification,
The functions such as positioning, resource management, performance detection.
Additionally, PON system there is also another way of realization, implement in PON system of the present invention second
In example, with reference to Fig. 6 and Fig. 7, PON system includes OLT subsystem, ONU subsystem and above-mentioned
Intelligent ODN device, the inner fibers plug of described intelligent ODN device and ONU being connected far-end
Downlink optical fiber connection, the outer fibers plug of described intelligent ODN device and the OLT being connected local side of system
The uplink optical fibers connection of subsystem.
In the present embodiment, ONU and be distributed formula OTDR systemic-function intelligent ODN be located at passive
The far-end of fiber optic network PON system, near user side；OLT is located at passive optical-fiber network PON system
Local side.PCB inner fibers plug connects downlink optical fiber, and PCB outer fibers plug connects uplink optical fibers.
Fiber adapter is connected with PCB inner fibers plug, can be connected with PCB outer fibers plug simultaneously, from
And realize assembling side downlink optical fiber and outside uplink optical fibers linkage function in unit fiber fusion matching plate body.Optical fiber
The OTDR monitoring function to uplink optical fibers outside PCB also realized by adapter, that is, realize local side OLT
The function that this section of optical fiber of optical module is monitored.
Further, also there is the multiple intelligent ODN as shown in Figure 6 of another combination in PON system
The way of realization of device, in PON system 3rd embodiment of the present invention, with reference to Fig. 6 and Fig. 8, PON
System includes OLT subsystem, ONU subsystem, light distributor and above-mentioned intelligent ODN device, institute
The inner fibers plug stating intelligent ODN device is connected with the downlink optical fiber of the ONU subsystem being connected far-end,
The outer fibers plug of described intelligent ODN device is connected with described light distributor, described light distributor and company
Connect the uplink optical fibers connection of the OLT subsystem of local side.
The distributed OTDR solution of existing PON system, OLT subsystem OTDR module receives
Reflected light signal be that the optical signal being reflected back from multiple ONU stacks up, therefore optical fiber breaks down
When OLT subsystem to be unable to automatic decision be that the corresponding optical fiber of which ONU is out of joint.It is typically only capable to tie
Closing the history OTDR parameter database of PON system and artificial participation judgement is corresponding of certain ONU
The OTDR optical signal being emitted back towards corresponds to certain portion of reflected light signal that OLT subsystem OTDR module receives
Point.
In the present embodiment, using the PON system shown in Fig. 8 of the present invention, the intelligence shown in Fig. 6
ODN device arranges light distributor downlink optical fiber position, realizes individually implementing OTDR to each ONU
Monitoring function.Described light distributor is 1：N light distributor, 1 road optical fiber is connected to by uplink optical fibers
OLT subsystem, another N road optical fiber is connected to the light distribution plant of intelligent ODN device by downlink optical fiber
(i.e. intelligent ODN device uplink optical fibers as shown in Figure 6), wherein, the preferred span of N is 2～64,
Thus realizing automatic decision is the corresponding optical fiber of which ONU function out of joint.
Based on the content of PON system 3rd embodiment of the present invention, with reference to Fig. 8, real in PON system the 3rd
Apply in example, intelligent ODN device is applied in local side, integrates with OLT subsystem, propose PON
System fourth embodiment, with reference to Fig. 9, the intelligent ODN device of the present invention can also be applied in far-end,
Integrate with ONU subsystem, the line connecting relation of PON system, the effect being reached and PON
System 3rd embodiment is essentially identical, and here does not do tired stating.
Through the above description of the embodiments, those skilled in the art can be understood that above-mentioned
Embodiment method can be realized by the mode of software plus necessary general hardware platform naturally it is also possible to lead to
Cross hardware, but the former is more preferably embodiment in many cases.Based on such understanding, the present invention's
Technical scheme substantially in other words prior art is contributed partly can in the form of software product body
Reveal to come, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, light
Disk) in, including some instructions with so that a station terminal equipment (can be mobile phone, computer, service
Device, air-conditioner, or network equipment etc.) execution each embodiment of the present invention method.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every
The equivalent structure made using description of the invention and accompanying drawing content or equivalent flow conversion, or directly or
Connect and be used in other related technical fields, be included within the scope of the present invention.
Claims (10)
1. a kind of intelligent Optical Distribution Network device is it is characterised in that described intelligent Optical Distribution Network ODN
Device includes printing board PCB, fiber adapter and OTDR part, and described PCB is provided with electricity
Subtab socket and control chip；Described OTDR part is connected with described fiber adapter optical fiber, described
OTDR part and described PCB control chip electrical connection, described fiber adapter respectively with described
The outer fibers plug fibers of the inner fibers plug of PCB and described PCB connect.
2. intelligent ODN device as claimed in claim 1 is it is characterised in that described intelligent ODN fills
Put the electronic tag also including being arranged on described outer fibers plug, described electronic tag with located at described
Electronic tag socket on PCB connects, and described electronic tag socket is electrically connected with described control chip.
3. intelligent ODN device as claimed in claim 2 is it is characterised in that in described fiber adapter
Portion is provided with wave multiplexer, and described OTDR part is connected with described wave multiplexer optical fiber, described inner fibers plug
All it is connected with described wave multiplexer optical fiber with outer fibers plug.
4. intelligent ODN device as claimed in claim 3 is it is characterised in that described wave multiplexer includes
One optical interface, the second optical interface and the 3rd optical interface, described first optical interface and described inner fibers plug
Optical fiber connects, and described second optical interface is connected with described external side light Interface Fiber, described 3rd optical interface and
Described OTDR component, fiber connects, the work of the optical carrier to the second optical interface for described first optical interface
Make the operating wavelength range of wave-length coverage and the optical carrier to the 3rd optical interface for described first optical interface not
Overlap.
5. intelligent ODN device as claimed in claim 3 is it is characterised in that described wave multiplexer is ripple
Division multiplexer.
6. intelligent ODN device as claimed in claim 1 is it is characterised in that described intelligent ODN fills
Put and also include fiber fusion matching plate, described fiber adapter, inner fibers plug, OTDR part and PCB
It is arranged on inside fiber fusion matching plate, described outer fibers plug is arranged on outside fiber fusion matching plate.
7. as described in claim 1 to 6 any one intelligent ODN device it is characterised in that described
OTDR part is installed on described PCB.
8. a kind of passive optical fiber network system is it is characterised in that described passive optical-fiber network PON system
Including OLT subsystem, ONU subsystem and the intelligent ODN as described in claim 1 to 7 any one
Device, the inner fibers plug of described intelligent ODN device is up with the OLT subsystem being connected local side
Optical fiber connection, the outer fibers plug of described intelligent ODN device and the ONU subsystem being connected far-end
Downlink optical fiber connects.
9. a kind of passive optical fiber network system is it is characterised in that described passive optical-fiber network PON system
Including OLT subsystem, ONU subsystem and the intelligent ODN as described in claim 1 to 7 any one
Device, the inner fibers plug of described intelligent ODN device is descending with the ONU subsystem being connected far-end
Optical fiber connection, the outer fibers plug of described intelligent ODN device and the OLT subsystem being connected local side
Uplink optical fibers connect.
10. a kind of passive optical fiber network system is it is characterised in that described passive optical-fiber network PON system
System includes OLT subsystem, ONU subsystem, light distributor and multiple as any in claim 1 to 7
Intelligent ODN device described in one, the inner fibers plug of described intelligent ODN device be connected far-end
ONU subsystem downlink optical fiber connection, the outer fibers plug of described intelligent ODN device with described
Light distributor connects, and described light distributor is connected with the uplink optical fibers of the OLT subsystem being connected local side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448091.XA CN106411397A (en) | 2015-07-27 | 2015-07-27 | Intelligent optical distribution network (ODN) device and passive optical network (PON) system |
| PCT/CN2015/092865 WO2016131301A1 (en) | 2015-07-27 | 2015-10-26 | Intelligent optical distribution network apparatus and passive optical network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448091.XA CN106411397A (en) | 2015-07-27 | 2015-07-27 | Intelligent optical distribution network (ODN) device and passive optical network (PON) system |
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| CN106411397A true CN106411397A (en) | 2017-02-15 |
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| CN201510448091.XA Pending CN106411397A (en) | 2015-07-27 | 2015-07-27 | Intelligent optical distribution network (ODN) device and passive optical network (PON) system |
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| CN (1) | CN106411397A (en) |
| WO (1) | WO2016131301A1 (en) |
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| CN110971705A (en) * | 2019-09-09 | 2020-04-07 | 张成菊 | Optical fiber transmission positioning method and device |
| WO2020244628A1 (en) * | 2019-06-06 | 2020-12-10 | 中国移动通信有限公司研究院 | Active module, mobile communication fronthaul system, and mobile communication fronthaul management and control method |
| CN115276783A (en) * | 2022-07-04 | 2022-11-01 | 长芯盛（武汉）科技有限公司 | Front-transmission optical module WDM device and network management method thereof |
| CN115276783B (en) * | 2022-07-04 | 2024-05-03 | 长芯盛（武汉）科技有限公司 | Forward optical module WDM equipment and network management method thereof |
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| CN108616305A (en) * | 2018-05-08 | 2018-10-02 | 国网天津市电力公司 | A kind of power distribution automation communication equipment integration fault location system |
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Also Published As
| Publication number | Publication date |
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| WO2016131301A1 (en) | 2016-08-25 |
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