CN103701520A - CWDM (coarse wavelength division multiplexer) system with protection function and method for realizing protection function of CWDM system - Google Patents
CWDM (coarse wavelength division multiplexer) system with protection function and method for realizing protection function of CWDM system Download PDFInfo
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Abstract
The invention discloses a CWDM (coarse wavelength division multiplexer) system with a protection function and a method for realizing the protection function of the CWDM system. The method comprises the following steps that light with a specific wavelength emitted by a specific wavelength emitter arranged at an active side is taken as detection light to be coupled with light in a service band at the active side, and then is sent to a passive side through a main passage or a standby passage; the passive side filters the received light signal to obtain detection light and couples the detection light to the main passage or the standby passage again to return the detection light to the active side; the active side converts the detection light returned by the passive side into an electric signal, and compares the electric signal with a set threshold to obtain a judgment result about the condition whether the current working passage is normal or not: if the judgment result indicates that the current working passage is not normal, the current working passage is switched into a corresponding working passage; otherwise, the original working passage is maintained. The system realizes a function of concurrent selective receiving and selection and switch of circuits under the passive condition, and is simple in structure and easy to realize.
Description
Technical field
The present invention relates to CWDM system, the method that is specifically related to there is the CWDM system of defencive function and realizes defencive function.
Background technology
DWDM(Dense Wavelength Division Multiplexer, dense wave division multipurpose) system is undoubtedly the one preferred technique in current fiber optic applications field, but it is expensive.In order to reduce costs, CWDM(Coarse Wavelength Division Multiplexer, coarse wavelength division multiplexer, also claims Coarse Wavelength Division Multiplexing) system is widely applied as the transition of dwdm system.CWDM is a kind of low-cost WDM transmission technology towards metropolitan area network Access Layer, it utilizes optical multiplexer that the optical multiplexed signal of different wave length is used to simple optical fiber and transmitted, receiving terminal at link, by optical demultiplexer, the mixed signal in optical fiber is decomposed into the signal of different wave length, is transferred to corresponding receiving equipment.
The wavelength-division technical protection function of CWDM system is limited to active condition at present, cannot realize selection and the switching of concurrent choosing receipts and circuit under passive condition.Nowadays, in integration of three networks progradation, the transformation of broadcasting and TV large scale bi-directional net, outstanding to defencive function demand.Broadcasting and TV demand wave-division device one end is for machine room, and one end, for outdoor connector case, does not possess condition of power supply in addition, and, along with network evolution, the demand of protection is not limited only to radio, TV and film industries.
As can be seen here, being badly in need of a kind of utilization of research and development has source and inactive side CWDM equipment interconnection to realize the system of defencive function, to meet the wavelength-division technical protection function of CWDM system.
Summary of the invention
Technical problem to be solved by this invention is the problem that CWDM system cannot realize source and inactive side defencive function.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of CWDM system to realize the method for defencive function, comprises the following steps:
Step 1: by there being the specific wavelength photophore of source setting to send special wavelength light as detecting after light and the coupling of active side business band of light, send to inactive side by main channel or standby passage;
Step 2: inactive side obtains the first detection light by the optical signal filtering of receiving and is again coupled to main channel or returned to source for passage;
Step 3: have source again the first detection light to be converted into first signal of telecommunication, and by whether comparing first signal of telecommunication lower than the threshold value of setting, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is undesired, is switched to relevant work passage; Otherwise, keep work on hand passage, go to step 1.
In said method, further comprising the steps of:
Step 4: the closing after ripple of inactive side service signal finishing service signal, be divided into two and form main signal and standby signal respectively through main channel and standby channel transfer to there being source;
Step 5: having source, main signal is divided into the first main signal and the first detection signal, standby signal is divided into first for signal and the second detection signal, and the first main signal and first does not export the second optical switch to for signal, and first, second detection signal is converted to respectively second, third signal of telecommunication;
Step 6: by comparing the magnitude of voltage of second, third signal of telecommunication, obtain the whether normal judged result of inactive side service signal work at present passage, passage is undesired if judged result shows work at present, is switched to relevant work passage; Otherwise, keep work on hand passage, go to step 4.
In said method, according to 95:5, described main signal and standby signal are carried out to light splitting, wherein, 95% light signal is used for reducing each service signal of inactive side, and 5% light signal is used for being converted to second, third signal of telecommunication.
In said method, described specific wavelength light wavelength is 1390nm.
The invention provides a kind of CWDM system with defencive function, comprise the active side apparatus and the inactive side equipment that by network, connect,
Described active side apparatus is provided with specific wavelength photophore and the first coupler, described specific wavelength photophore sends special wavelength light as detecting light, after described detection light is coupled by described the first coupler and active side business band of light, the main channel of the optical link protective disc by the first optical switch on active side apparatus or standby passage send to described inactive side equipment;
Described inactive side equipment obtains the first detection light by the light signal receiving by filter filtering, and the first detection light is again coupled to main channel or returns to described active side apparatus for passage;
Described the first coupler in described active side apparatus receives the first detection light feeding back through described the first optical switch, and the first detection light is converted into first signal of telecommunication, by whether comparing first signal of telecommunication lower than the threshold value of setting, obtain the whether normal judged result of work at present passage, if this signal of telecommunication, lower than the threshold value of setting, judges work at present channel failure and switches corresponding service aisle.
In above-mentioned CWDM system, described first detects light enters described the first coupler through add drop multiplex filter, and a PIN pipe of exporting in described optical link protective disc carries out opto-electronic conversion, obtains described first signal of telecommunication.
In above-mentioned CWDM system, inactive side service signal closes ripple and is divided into two and forms main signal and standby signal by optical branching device by closing ripple dish, and by main channel and standby channel transfer, give and have source respectively, there iing source, main signal is divided into the first main signal and the first detection signal by the second coupler, standby signal is divided into first for signal and the second detection signal by the 3rd coupler, the first main signal and first does not export the second optical switch to for signal, and first, second detection signal is converted to respectively second, third signal of telecommunication;
By comparing the magnitude of voltage of second, third signal of telecommunication, obtain the whether normal judged result of inactive side service signal work at present passage, if judged result shows work at present, passage is undesired, by the second optical switch, is switched to relevant work passage.Described specific wavelength light wavelength is 1390nm.
In above-mentioned CWDM system, by second, third coupler, described main signal and standby signal are carried out to light splitting according to 95:5, wherein, 95% light signal is used for reducing each service signal, and 5% light signal is used for being converted to second, third signal of telecommunication.
In above-mentioned CWDM system, described in to have source be 1390nm for detection of the specific wavelength light wavelength of radiant.
The present invention, route protection function when utilize detecting feedback light and realizing active equipment and dock with inactive component, has solved the problem that CWDM system cannot realize source and inactive side defencive function, and implementation is simple, and cost is low, applies and facilitates.
Accompanying drawing explanation
Fig. 1 is the CWDM system schematic with defencive function provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, the CWDM system with defencive function provided by the invention, comprises the active side apparatus 10 and the inactive side equipment 20 that by network, connect.
Active side apparatus 10 comprises and closes ripple dish 11, optical link protective disc 12 and partial wave dish 13 with detection light source.
The ripple dish 11 that closes with detection light source comprises wave multiplexer 111, specific wavelength photophore 112, the first coupler 113 and add drop multiplex filter 114, in the present embodiment, what specific wavelength photophore 112 was selected is that wavelength is the light source of 1390nm, and the model of add drop multiplex filter 114 is 1390ADF.
Optical link protective disc 12 can provide receive and sending direction on main channel and standby passage select and receive and protect and switch.Optical link protective disc 12 comprises PIN pipe 121, first testing circuit 122, control unit CPU, the first optical switch 123, the 2nd PIN pipe the 124, second testing circuit 125, the second coupler 126, the 3rd PIN pipe 127, three testing circuit 128 and the 3rd coupler 129.
Inactive side equipment 20 comprises and closes wave device 21 and a minute wave device 22.Close wave device 21 and comprise wave multiplexer 211 and optical branching device 212, a minute wave device 22 comprises the second channel-splitting filter 221, filter 222 and the 4th coupler 223.
Defencive function implementation method of the present invention is as follows:
Having source, 1390nm that 1390nm light source sends detects light after the first coupler 113 outputs, in add drop multiplex filter 114 with the photosynthetic ripple of active side business wave band and output to optical link protective disc 12.
The transmit port of optical link protective disc 12 is a bidirectional port OUT-P and OUT-S, and OUT-P is main channel and standby passage with the output that OUT-S is connected respectively the first optical switch 123, and the input of the first optical switch 123 is connected with source and closes wave optical signal.Under the control of CPU, the selection completing there being source to close wave optical signal by the first optical switch 123 sends.
In inactive side; minute wave device 22 is isolated 1390nm by the light signal being sent by main channel or standby passage after by the 4th coupler 223, filter 22 filtering and is detected light; this isolated 1390nm detects light as the first detection light; first detects light feeds back to main channel and standby passage by the 4th coupler 223 again, and turns back to the optical link protective disc 12 in active side apparatus.
The 1390nm that inactive side equipment feeds back detects light (first detects light) through the first optical switch 123, add drop multiplex filter 114 enters the first coupler 113, the output port of the first coupler 113 is bidirectional ports, this port receives first and detects light, and export to a PIN pipe 121 in optical link protective disc 12 and carry out opto-electronic conversion and generate first signal of telecommunication, first signal of telecommunication is exported to CPU after processing by the first testing circuit 122, whether CPU is by comparing first signal of telecommunication lower than the threshold value of setting, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is undesired, by the first optical switch 123, be switched to corresponding service aisle, otherwise, keep current service aisle, and proceed said process.
In addition, inactive side service signal closes after ripple by wave multiplexer 211 finishing service signals, through optical branching device 212, be divided into two and form main signal and standby signal, and respectively through main channel and standby channel transfer to optical link protective disc 12.
In optical link protective disc 12, main signal is divided into the first main signal and the first detection signal by the second coupler 126 by the splitting ratio of 95:5, standby signal is divided into first for signal and the second detection signal by the 3rd coupler 129 by the splitting ratio of 95:5, the first main signal and first does not export the second optical switch 130 to for signal, the output of the second optical switch 130 is connected with the first channel-splitting filter 131 in source equipment, by the first channel-splitting filter 131, be reduced to each service signal, first, the second detection signal is respectively by second, the 3rd PIN pipe 124, 127 are converted to second, the 3rd signal of telecommunication, second, the 3rd signal of telecommunication is through second, three testing circuit 125, 128 export to CPU, CPU by relatively this second, the 3rd signal of telecommunication, obtain the whether normal judged result of work at present passage, if second signal of telecommunication is less than the 3rd signal of telecommunication (as lower than the 3rd signal of telecommunication more than 20%), the main channel that shows work at present is undesired, by the second optical switch, be switched to standby passage, otherwise, keep current service aisle, and proceed said process.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (9)
1.CWDM system realizes the method for defencive function, it is characterized in that, comprises the following steps:
Step 1: by there being the specific wavelength photophore of source setting to send special wavelength light as detecting after light and the coupling of active side business band of light, send to inactive side by main channel or standby passage;
Step 2: inactive side obtains the first detection light by the optical signal filtering of receiving and is again coupled to main channel or returned to source for passage;
Step 3: have source again the first detection light to be converted into first signal of telecommunication, and by whether comparing first signal of telecommunication lower than the threshold value of setting, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is undesired, is switched to relevant work passage; Otherwise, keep work on hand passage, go to step 1.
2. the method for claim 1, is characterized in that, further comprising the steps of:
Step 4: the closing after ripple of inactive side service signal finishing service signal, be divided into two and form main signal and standby signal respectively through main channel and standby channel transfer to there being source;
Step 5: having source, main signal is divided into the first main signal and the first detection signal, standby signal is divided into first for signal and the second detection signal, and the first main signal and first does not export the second optical switch to for signal, and first, second detection signal is converted to respectively second, third signal of telecommunication;
Step 6: by comparing the magnitude of voltage of second, third signal of telecommunication, obtain the whether normal judged result of inactive side service signal work at present passage, passage is undesired if judged result shows work at present, is switched to relevant work passage; Otherwise, keep work on hand passage, go to step 4.
3. method as claimed in claim 2, is characterized in that, according to 95:5, described main signal and standby signal is carried out to light splitting, and wherein, 95% light signal is used for reducing each service signal of inactive side, and 5% light signal is used for being converted to second, third signal of telecommunication.
4. the method for claim 1, is characterized in that, described specific wavelength light wavelength is 1390nm.
5. the CWDM system with defencive function, comprises the active side apparatus and the inactive side equipment that by network, connect, it is characterized in that,
Described active side apparatus is provided with specific wavelength photophore and the first coupler, described specific wavelength photophore sends special wavelength light as detecting light, after described detection light is coupled by described the first coupler and active side business band of light, the main channel of the optical link protective disc by the first optical switch on active side apparatus or standby passage send to described inactive side equipment;
Described inactive side equipment obtains the first detection light by the light signal receiving by filter filtering, and the first detection light is again coupled to main channel or returns to described active side apparatus for passage;
Described the first coupler in described active side apparatus receives the first detection light feeding back through described the first optical switch, and the first detection light is converted into first signal of telecommunication, by whether comparing first signal of telecommunication lower than the threshold value of setting, obtain the whether normal judged result of work at present passage, if this signal of telecommunication, lower than the threshold value of setting, judges work at present channel failure and switches corresponding service aisle.
6. CWDM system as claimed in claim 5, is characterized in that, described first detects light enters described the first coupler through add drop multiplex filter, and a PIN pipe of exporting in described optical link protective disc carries out opto-electronic conversion, obtains described first signal of telecommunication.
7. CWDM system as claimed in claim 5, it is characterized in that, inactive side service signal closes ripple and is divided into two and forms main signal and standby signal by optical branching device by closing ripple dish, and by main channel and standby channel transfer, give and have source respectively, there iing source, main signal is divided into the first main signal and the first detection signal by the second coupler, standby signal is divided into first for signal and the second detection signal by the 3rd coupler, the first main signal and first does not export the second optical switch to for signal, and first, second detection signal is converted to respectively second, third signal of telecommunication;
By comparing the magnitude of voltage of second, third signal of telecommunication, obtain the whether normal judged result of inactive side service signal work at present passage, if judged result shows work at present, passage is undesired, by the second optical switch, is switched to relevant work passage.
8. CWDM system as claimed in claim 7, it is characterized in that, by second, third coupler, described main signal and standby signal are carried out to light splitting according to 95:5, wherein, 95% light signal is used for reducing each service signal, and 5% light signal is used for being converted to second, third signal of telecommunication.
9. the CWDM system as described in claim 5-8 item any one, is characterized in that, described in to have source be 1390nm for detection of the specific wavelength light wavelength of radiant.
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| CN112118068A (en) * | 2019-06-20 | 2020-12-22 | 中国移动通信有限公司研究院 | State monitoring method, device, equipment and storage medium of forwarding network |
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Effective date of registration: 20170413 Address after: 430000 East Lake high tech Development Zone, Hubei Province, No. 6, No., high and new technology development zone, No. four Patentee after: Fenghuo Communication Science &. Technology Co., Ltd. Address before: East Lake high tech city of Wuhan province Hubei Dongxin road 430074 No. 5 East optical communication industry building in Wuhan Fenghuo Network Co Ltd Patentee before: Wuhan Fenghuo Network Co., Ltd. |