CN207010887U - EPON extends system - Google Patents
EPON extends system Download PDFInfo
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- CN207010887U CN207010887U CN201720767077.0U CN201720767077U CN207010887U CN 207010887 U CN207010887 U CN 207010887U CN 201720767077 U CN201720767077 U CN 201720767077U CN 207010887 U CN207010887 U CN 207010887U
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Abstract
The utility model provides a kind of EPON extensions system, including optical line terminal, wavelength division multiplexer, demultiplexer optical splitter, multiple optical network units, optical line terminal have the first optical line terminal and the second optical line terminal；Optical splitter has the first optical splitter and the second optical splitter, and the first optical splitter and the second optical splitter are all connected with multiple optical network units；First optical line terminal connects the first optical splitter after being sequentially connected wavelength division multiplexer, demultiplexer, and the first optical splitter connects N number of optical network unit；Second optical line terminal connects the second optical splitter after being sequentially connected wavelength division multiplexer, demultiplexer, and the second optical splitter connects M optical network unit.Low cost extension is realized on the basis of former circuit is not changed；Single network interfaces link between OLT and ONU expands to dual network interface link, multicast service and unicast service by the mutually isolated transmission of each different links, improves network bandwidth utilization factor, while improve the quality of video traffic and broadband access network business.
Description
Technical field
The utility model belongs to technical field of optical fiber, and in particular to a kind of EPON extends system.
Background technology
Traditional EPON system, the corresponding optical splitter of an optical line terminal OLT, an optical splitter connect multiple correspondences
The optical network unit ONU of wavelength, whole system are at most only used for each users of N, and N is the splitting ratio of optical splitter, when needing to connect
, it is necessary to re-lay EPON system during more users, waste time and energy, cost is high.
On the other hand, EPON system is transmitted using point-to-multipoint structure, passive fiber, is carried on Ethernet paper a variety of
Business, including data service (broadband access network), speech business, video traffic etc..Traditional EPON system networking mode is：It is multiple
ONU optical network interface is connected by EPON and OLT an optical network interface, is that downlink data is wide the characteristics of EPON
Broadcast mode transmits, that is, descending all data can all reach each ONU, and ONU filters according to the logical links number of oneself
One's own data.When the splitting ratio that OLT is connected with ONU is 1：During N, N number of ONU shares downlink bandwidth.When traditional EPON is used
When multicast service (video traffic, speech business etc.) and unicast service (broadband access network) is carried simultaneously, that is, using single fiber
Transmission means simultaneous transmission big flow multicast and unicast data stream, interfere system between multicast data stream and unicast data stream
About, the quality of video traffic and broadband access network is directly affected, larger pressure is brought to system operation.
The content of the invention
In order to solve the above technical problems, the utility model provides a kind of EPON extensions system, the base of former circuit is not changed
Low cost extension is realized on plinth；At the same time, the single network interfaces link between OLT and ONU expands to dual network interface link,
Multicast service and unicast service are improved network bandwidth utilization factor, carried simultaneously by the mutually isolated transmission of each different links
The quality of high video traffic and broadband access network business.
To reach above-mentioned purpose, the technical solution of the utility model is as follows：A kind of EPON extends system, including optical link end
OLT, optical splitter and multiple optical network unit ONUs are held, fiber optic communication, institute are based between the optical line terminal OLT and optical splitter
State and fiber optic communication be based between optical splitter and each optical network unit ONU, it is characterised in that：Its also include wavelength division multiplexer WDM and
Demultiplexer, the optical line terminal have two be independently arranged, respectively the first optical line terminal OLT 1 and the second light
Road terminal OLT2；The optical splitter has the first optical splitter and the second optical splitter, first optical line terminal and the second light
The output end of both road terminals is all connected with wavelength division multiplexer, the output end connection demultiplexer of the wavelength division multiplexer, the solution
The output end of multiplexer is connected to the first optical splitter and the second optical splitter being arranged in parallel, first optical splitter and the second light splitting
Device is all connected with multiple optical network unit ONUs；
First optical line terminal OLT 1 connects the first optical splitter, institute after being sequentially connected wavelength division multiplexer, demultiplexer
State the first optical splitter and connect N number of optical network unit；Second optical line terminal OLT 2 is sequentially connected wavelength division multiplexer, demultiplexing
The second optical splitter is connected after device, second optical splitter connects M optical network unit.
In one preferred embodiment of the utility model, further comprise the light of the first optical line terminal OLT 1 and second
Line terminal OLT2 is respectively provided with two optical network interfaces, the respectively PON1 of optical network interface one and the PON2 of optical network interface two, institute
Stating the first optical splitter has a splitting ratio identical two, respectively the first multicast optical splitter and the first unicast optical splitter, and described
Two optical splitters have splitting ratio identical two, respectively the second multicast optical splitter and the second unicast optical splitter, each optical-fiber network list
First ONU is respectively provided with two optical network interfaces, respectively multi-case data interface and unicast data interface；
The PON1 of optical network interface one of first optical line terminal OLT 1 be sequentially connected wavelength division multiplexer, demultiplexer,
The unicast data interface with all optical network unit ONUs of the first unicast optical splitter pairing is connected to after first unicast optical splitter；
The PON2 of optical network interface two of first optical line terminal OLT 1 be sequentially connected wavelength division multiplexer, demultiplexer,
The first multicast optical splitter after be connected to and connect with the multi-case data of all optical network unit ONUs of the first multicast optical splitter pairing
Mouthful；
The PON1 of second light path terminal OLT2 optical network interfaces one is sequentially connected wavelength division multiplexer, demultiplexer, second
The unicast data interface with all optical network unit ONUs of the second unicast optical splitter pairing is connected to after unicast optical splitter；
The PON2 of optical network interface two of second optical line terminal OLT 2 be sequentially connected wavelength division multiplexer, demultiplexer,
The second multicast optical splitter after be connected to and connect with the multi-case data of all optical network unit ONUs of the second multicast optical splitter pairing
Mouthful.
In one preferred embodiment of the utility model, further comprise that each optical network unit ONU includes multicast core
Piece IC1, unicast chip IC 2.
In one preferred embodiment of the utility model, further comprise the light splitting of first optical splitter and the second optical splitter
Than being 1:64.
In one preferred embodiment of the utility model, further comprise that each optical line terminal OLT includes laser and driven
Dynamic device, laser, the output end connecting laser of the laser driver.
In one preferred embodiment of the utility model, the wavelength for further comprising the transmitting of the first optical line terminal laser is
1490nm, a length of 1310nm of received wave, the wavelength of the second optical line terminal laser transmitting is 1550nm, and received wave is a length of
1390nm。
The beneficial effects of the utility model are:
One, EPON of the present utility model extension systems, design two optical line terminals, so in one end of wavelength division multiplexer
The light wave of different wave length is sent/received afterwards by different OLT, by optical splitter multiple optical network units in parallel, existing
In EPON system, increase OLT all the way, realize the dilatation of system, low cost extension is realized on the basis of former circuit is not changed；
Secondly, the single network interfaces link between OLT and ONU expand to dual network interface link, multicast service and unicast
Business improves network bandwidth utilization factor, while improve video traffic and width by the mutually isolated transmission of each different links
Quality with business of networking.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the utility model embodiment technology, embodiment technology will be retouched below
The required accompanying drawing used is briefly described in stating, it should be apparent that, drawings in the following description are only the utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the Organization Chart of the utility model preferred embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment
As shown in figure 1, a kind of EPON extensions system is disclosed in the present embodiment, including optical line terminal OLT, wavelength-division multiplex
Device WDM, demultiplexer optical splitter, multiple optical network unit ONUs, above-mentioned optical line terminal have two be independently arranged, respectively
For the first optical line terminal OLT 1 and the second optical line terminal OLT 2；Above-mentioned optical splitter has the first optical splitter and the second light splitting
The output end of both devices, above-mentioned first optical line terminal and the second optical line terminal is all connected with wavelength division multiplexer, and above-mentioned wavelength-division is answered
Demultiplexer is connected with the output end of device, the output end of above-mentioned demultiplexer is connected to the first optical splitter and second being arranged in parallel
Optical splitter, above-mentioned first optical splitter and the second optical splitter are all connected with multiple above-mentioned optical network unit ONUs；
Above-mentioned first optical line terminal OLT 1 connects the first optical splitter after being sequentially connected wavelength division multiplexer, demultiplexer, on
State the first optical splitter and connect N number of optical network unit；Above-mentioned second optical line terminal OLT 2 is sequentially connected wavelength division multiplexer, demultiplexing
The second optical splitter is connected after device, above-mentioned second optical splitter connects M optical network unit.
Specifically, each above-mentioned optical line terminal OLT include laser driver, laser, above-mentioned laser driver it is defeated
Going out and hold connecting laser, the wavelength of the first optical line terminal laser transmitting is 1490nm, received wave a length of 1310nm, above-mentioned the
The wavelength of two optical line terminal lasers transmitting is 1550nm, a length of 1390nm of received wave.
Two optical line terminal OLTs 1, OLT2 design different launch wavelengths and receive wavelength, while through wavelength division multiplexer
With respectively enter the first optical splitter and the second optical splitter after demultiplexer, the optical signal of different wave length converges by wavelength division multiplexer
Into optical fiber all the way, then it is divided into two-way optical fiber by demultiplexer, respectively enters the first optical splitter and the second optical splitter, passes through
The optical network unit ONU of one optical splitter and the second optical splitter connection corresponding wavelength, in the present embodiment technical scheme, the first optical splitter
1 is both preferably with the splitting ratio of the second optical splitter:64, each optical splitter will be divided into 64 tunnels by optical fiber all the way.
The EPON system of above structure increases OLT all the way, realizes the dilatation of system, do not changing in existing EPON system
Realization low cost extends on the basis of becoming former circuit.
As further improvement of the utility model, the above-mentioned optical line terminal OLT 2 of first optical line terminal OLT 1 and second
It is respectively provided with two optical network interfaces, the respectively PON1 of optical network interface one and the PON2 of optical network interface two, above-mentioned first optical splitter
With splitting ratio identical two, respectively the first multicast optical splitter and the first unicast optical splitter, above-mentioned second optical splitter has
Splitting ratio identical two, respectively the second multicast optical splitter and the second unicast optical splitter, each optical network unit ONU are respectively provided with
Two optical network interfaces, respectively multi-case data interface and unicast data interface；
The PON1 of optical network interface one of above-mentioned first optical line terminal OLT 1 be sequentially connected wavelength division multiplexer, demultiplexer,
The unicast data interface with all optical network unit ONUs of the first unicast optical splitter pairing is connected to after first unicast optical splitter；
The PON2 of optical network interface two of above-mentioned first optical line terminal OLT 1 be sequentially connected wavelength division multiplexer, demultiplexer,
The first multicast optical splitter after be connected to and connect with the multi-case data of all optical network unit ONUs of the first multicast optical splitter pairing
Mouthful；
The above-mentioned PON1 of second light path terminal OLT2 optical network interfaces one is sequentially connected wavelength division multiplexer, demultiplexer, second
The unicast data interface with all optical network unit ONUs of the second unicast optical splitter pairing is connected to after unicast optical splitter；
The PON2 of optical network interface two of above-mentioned second optical line terminal OLT 2 be sequentially connected wavelength division multiplexer, demultiplexer,
The second multicast optical splitter after be connected to and connect with the multi-case data of all optical network unit ONUs of the second multicast optical splitter pairing
Mouthful.
The PON1 of optical network interface one of first optical line terminal OLT 1, wavelength division multiplexer, demultiplexer, the first unicast light splitting
The first link transmission unicast service data that device is formed；The PON1 of optical network interface one of second optical line terminal OLT 2, wavelength-division are multiple
The 3rd link transmission unicast service data formed with device, demultiplexer, the second unicast optical splitter.
The PON2 of optical network interface two of first optical line terminal OLT 1, wavelength division multiplexer, demultiplexer, the first multicast light splitting
The second link transmission cast service data that device is formed；The PON2 of optical network interface two of second optical line terminal OLT 2, wavelength-division are multiple
The 4th link transmission cast service data formed with device, demultiplexer, the second multicast optical splitter.In this way, between OLT and ONU
Single network interfaces link to expand to dual network interface link, multicast service and unicast service mutual by each different links
The transmission of isolation, network bandwidth utilization factor is improved, while improve the quality of video traffic and broadband access network business.
Each above-mentioned optical network unit ONU includes multicast chip IC 1, unicast chip IC 2, and multicast chip IC 1 handles multicast
Business datum, unicast chip IC 2 handle unicast service data, and unicast service data and cast service data are handled alone, eliminate
Interfering to each other, further improves quality of service.In addition, it should be clear that, the multicast in the present embodiment technical scheme
Chip IC 1, unicast chip IC 2 are the finished product that can directly buy on the market.
Current embodiment require that supplementary notes is：The machine is by optical line terminal OLT, wavelength division multiplexer, demultiplexer, light splitting
The specific hardware configuration composition such as device and optical network unit ONU, the participation of the software program of fractional hardware in the process of running are auxiliary
The software program for helping the machine to run is existing reproducible software program, does not form the innovative point of the application.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (6)
1. a kind of EPON extends system, including optical line terminal (OLT), optical splitter and multiple optical network units (ONU), the light
Line terminal (OLT) is based on fiber optic communication between optical splitter, and light is based between the optical splitter and each optical network unit (ONU)
Fiber communication, it is characterised in that：It also includes wavelength division multiplexer (WDM) and demultiplexer, and the optical line terminal, which has, independently to be set
Two put, respectively the first optical line terminal (OLT1) and the second optical line terminal (OLT2)；The optical splitter has first
The output end of both optical splitter and the second optical splitter, first optical line terminal and the second optical line terminal is all connected with wavelength-division and answered
With device, the output end connection demultiplexer of the wavelength division multiplexer, the output end of the demultiplexer is connected to what is be arranged in parallel
First optical splitter and the second optical splitter, first optical splitter and the second optical splitter are all connected with multiple optical network units
(ONU)；
First optical line terminal (OLT1) connects the first optical splitter after being sequentially connected wavelength division multiplexer, demultiplexer, described
First optical splitter connects N number of optical network unit；Second optical line terminal (OLT2) is sequentially connected wavelength division multiplexer, demultiplexing
The second optical splitter is connected after device, second optical splitter connects M optical network unit.
2. EPON according to claim 1 extends system, it is characterised in that：First optical line terminal (OLT1) and
Two optical line terminals (OLT2) are respectively provided with two optical network interfaces, respectively optical network interface one (PON1) and optical network interface two
(PON2), first optical splitter has splitting ratio identical two, respectively the first multicast optical splitter and the first unicast light splitting
Device, second optical splitter have splitting ratio identical two, respectively the second multicast optical splitter and the second unicast optical splitter, respectively
Optical network unit (ONU) is respectively provided with two optical network interfaces, respectively multi-case data interface and unicast data interface；
The optical network interface one (PON1) of first optical line terminal (OLT1) be sequentially connected wavelength division multiplexer, demultiplexer,
It is connected to after first unicast optical splitter and is connect with the unicast data of all optical network units (ONU) of the first unicast optical splitter pairing
Mouthful；
The optical network interface two (PON2) of first optical line terminal (OLT1) be sequentially connected wavelength division multiplexer, demultiplexer,
The first multicast optical splitter after be connected to and connect with the multi-case data of all optical network units (ONU) of the first multicast optical splitter pairing
Mouthful；
Second light path terminal (OLT2) optical network interface one (PON1) is sequentially connected wavelength division multiplexer, demultiplexer, second
The unicast data interface with all optical network units (ONU) of the second unicast optical splitter pairing is connected to after unicast optical splitter；
The optical network interface two (PON2) of second optical line terminal (OLT2) be sequentially connected wavelength division multiplexer, demultiplexer,
The second multicast optical splitter after be connected to and connect with the multi-case data of all optical network units (ONU) of the second multicast optical splitter pairing
Mouthful.
3. EPON according to claim 2 extends system, it is characterised in that：Each optical network unit (ONU) includes
Multicast chip (IC1), unicast chip (IC2).
4. EPON according to claim 1 extends system, it is characterised in that：First optical splitter and the second optical splitter
Splitting ratio is 1:64.
5. EPON according to claim 1 extends system, it is characterised in that：Each optical line terminal (OLT) includes
Laser driver, laser, the output end connecting laser of the laser driver.
6. EPON according to claim 5 extends system, it is characterised in that：The ripple of first optical line terminal laser transmitting
A length of 1490nm, received wave a length of 1310nm, the wavelength of the second optical line terminal laser transmitting are 1550nm, received wave
A length of 1390nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720767077.0U CN207010887U (en) | 2017-06-28 | 2017-06-28 | EPON extends system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720767077.0U CN207010887U (en) | 2017-06-28 | 2017-06-28 | EPON extends system |
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| Publication Number | Publication Date |
|---|---|
| CN207010887U true CN207010887U (en) | 2018-02-13 |
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|---|---|---|---|
| CN201720767077.0U Active CN207010887U (en) | 2017-06-28 | 2017-06-28 | EPON extends system |
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| Country | Link |
|---|---|
| CN (1) | CN207010887U (en) |
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- 2017-06-28 CN CN201720767077.0U patent/CN207010887U/en active Active
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