CN103701520B - There is the CWDM system of defencive function and realize the method for defencive function - Google Patents
There is the CWDM system of defencive function and realize the method for defencive function Download PDFInfo
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Abstract
The invention discloses and a kind ofly there is the CWDM system of defencive function and realize the method for defencive function.The method comprises the following steps: the specific wavelength photophore arranged by active side sends special wavelength light as after detection light and the optical coupling of active side service band, is sent to inactive side by main channel or standby passage; The optical signal filtering received obtains detecting light and is again coupled to main channel or returns to active side for passage by inactive side; The detection light that inactive side returns by active side is again converted into the signal of telecommunication, and by the threshold value of this signal of telecommunication and setting is compared, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is abnormal, be then switched to relevant work passage; Otherwise, keep former service aisle.Under present invention achieves passive condition, concurrent choosing is received and the selection of circuit and the function of switching, and structure is simple, is easy to realize.
Description
Technical field
The present invention relates to CWDM system, be specifically related to there is the CWDM system of defencive function and realize the method for defencive function.
Background technology
DWDM(DenseWavelengthDivisionMultiplexer, dense wave division multipurpose) one preferred technique in system current fiber optic applications field beyond doubt, but it is expensive.In order to reduce costs, CWDM(CoarseWavelengthDivisionMultiplexer, 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 to be transmitted with to simple optical fiber by the optical multiplexed signal of different wave length, at the receiving terminal of 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 current CWDM system is limited to active condition, cannot realize selection and the switching of concurrent choosing receipts and circuit under passive condition.Nowadays, in integration of three networks progradation, broadcasting and TV large scale bi-directional net is transformed, and gives prominence to defencive function demand.Broadcasting and TV demand wave-division device one end is used for machine room, and one end is used for outdoor connector case in addition, does not possess condition of power supply, and, along with e-learning quality, radio, TV and film industries are not limited only to the demand of protection.
As can be seen here, a kind of system utilizing active side and inactive side CWDM equipment interconnection to realize defencive function of research and development is badly in need of, 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 active side 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: the specific wavelength photophore arranged by active side sends special wavelength light as after detection light and the optical coupling of active side service band, is sent to inactive side by main channel or standby passage;
Step 2: the optical signal filtering received is obtained the first detection light and is again coupled to main channel or returns to active side for passage by inactive side;
Step 3: active side detects light by first again and is converted into first signal of telecommunication, and by whether comparing first signal of telecommunication lower than the threshold value set, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is abnormal, be then switched to relevant work passage; Otherwise, keep work on hand passage, go to step 1.
In the above-mentioned methods, further comprising the steps of:
Step 4: after the conjunction ripple of inactive side service signal finishing service signal, be divided into two and formed main signal and standby signal respectively through main channel and standby channel transfer to active side;
Step 5: in active side, 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 second, third signal of telecommunication respectively;
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, if judged result shows work at present, passage is abnormal, be then switched to relevant work passage; Otherwise, keep work on hand passage, go to step 4.
In the above-mentioned methods, carry out light splitting according to 95:5 to described main signal and standby signal, wherein, the light signal of 95% is for reducing each service signal of inactive side, and the light signal of 5% is used for being converted to second, third signal of telecommunication.
In the above-mentioned methods, the wavelength of described special wavelength light is 1390nm.
The invention provides a kind of CWDM system with defencive function, comprise the active side equipment and inactive side equipment that are connected by network,
Described active side equipment is provided with specific wavelength photophore and the first coupler, described specific wavelength photophore sends special wavelength light as detection light, described detection light, by after described first coupler and the optical coupling of active side service band, sends to described inactive side equipment by the main channel of the optical link protective disc of the first optical switch on active side equipment or standby passage;
The light signal received is obtained the first detection light by filter filtering by described inactive side equipment, and the first detection light is again coupled to main channel or returns to described active side equipment for passage;
Described first coupler in described active side equipment receives the first detection light fed back through described 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 set, obtain the whether normal judged result of work at present passage, if this signal of telecommunication lower than the threshold value of setting, then judges work at present channel failure and switches corresponding service aisle.
In above-mentioned CWDM system, described first detects light enters described first coupler through add drop multiplex filter, and the PIN pipe exported in described optical link protective disc carries out opto-electronic conversion, obtains described first signal of telecommunication.
In above-mentioned CWDM system, be divided into two through optical branching device after inactive side service signal closes ripple by conjunction ripple dish and form main signal and standby signal, and respectively by main channel and standby channel transfer to active side, in active side, 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, first main signal and first does not export the second optical switch to for signal, and first, second detection signal is converted to second, third signal of telecommunication respectively;
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 abnormal, be then switched to relevant work passage by the second optical switch.The wavelength of described special wavelength light is 1390nm.
In above-mentioned CWDM system, carry out light splitting to described main signal and standby signal according to 95:5 by second, third coupler, wherein, the light signal of 95% is for reducing each service signal, and the light signal of 5% is used for being converted to second, third signal of telecommunication.
In above-mentioned CWDM system, described active side is 1390nm for detecting the wavelength of the special wavelength light of radiant.
The present invention, utilization detection feedback light realizes route protection function when active equipment docks with inactive component, and solve the problem that CWDM system cannot realize active side and inactive side defencive function, implementation is simple, and cost is low, and application is convenient.
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 equipment 10 and inactive side equipment 20 that are connected by network.
Active side equipment 10 comprises conjunction ripple dish 11, optical link protective disc 12 and the partial wave dish 13 of being with detection light source.
Conjunction ripple dish 11 with detection light source comprises wave multiplexer 111, specific wavelength photophore 112, first coupler 113 and add drop multiplex filter 114, in the present embodiment, the light source of to be wavelength the be 1390nm that specific wavelength photophore 112 is selected, the model of add drop multiplex filter 114 is 1390ADF.
Optical link protective disc 12 can provide main channel and standby passage choosing on reception and sending direction receive and carry out pretection 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 124, second testing circuit 125, second coupler 126, the 3rd PIN pipe 127, three testing circuit 128 and the 3rd coupler 129.
Inactive side equipment 20 comprises conjunction wave device 21 and a point wave device 22.Close wave device 21 and comprise wave multiplexer 211 and optical branching device 212, a point 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:
In active side, 1390nm that 1390nm light source sends detects light after the first coupler 113 exports, in add drop multiplex filter 114, output to optical link protective disc 12 with the photosynthetic ripple of active side service band.
The transmit port of optical link protective disc 12 is that bidirectional port OUT-P and OUT-S, OUT-P with OUT-S are connected the output of the first optical switch 123 and main channel and standby passage respectively, 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 transmission of active side being closed to wave optical signal is completed by the first optical switch 123.
In inactive side; divide wave device 22 that the light signal sent by main channel or standby passage is detected light by isolating 1390nm after the 4th coupler 223, filter 22 filtering; this isolated 1390nm detects light and detects light as first; 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 equipment.
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 accepts first detects light, and the PIN pipe 121 exported in optical link protective disc 12 carries out opto-electronic conversion generates first signal of telecommunication, first signal of telecommunication exports to CPU after being processed by the first testing circuit 122, whether CPU is by comparing first signal of telecommunication lower than the threshold value set, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is abnormal, then be switched to corresponding service aisle by the first optical switch 123, otherwise, keep current service aisle, and proceed said process.
In addition, inactive side service signal, by after the conjunction ripple of wave multiplexer 211 finishing service signal, is divided into two through optical branching device 212 and forms 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, 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, each service signal is reduced to by the first channel-splitting filter 131, first, second detection signal is respectively by second, 3rd PIN pipe 124, 127 are converted to second, 3rd signal of telecommunication, second, 3rd signal of telecommunication is through second, three testing circuit 125, 128 export to CPU, CPU by compare this second, 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%), then show that the main channel of work at present is abnormal, standby passage is then switched to by the second optical switch, 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 made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within 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: the specific wavelength photophore arranged by active side sends special wavelength light as after detection light and the optical coupling of active side service band, is sent to inactive side by main channel or standby passage;
Step 2: the optical signal filtering received is obtained the first detection light and is again coupled to main channel or returns to active side for passage by inactive side;
Step 3: active side detects light by first again and is converted into first signal of telecommunication, and by whether comparing first signal of telecommunication lower than the threshold value set, obtain the whether normal judged result of work at present passage, if judged result shows work at present, passage is abnormal, be then 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: after the conjunction ripple of inactive side service signal finishing service signal, be divided into two and formed main signal and standby signal respectively through main channel and standby channel transfer to active side;
Step 5: in active side, 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 exports the second optical switch to respectively for signal, and first, second detection signal is converted to second, third signal of telecommunication respectively;
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, if judged result shows work at present, passage is abnormal, be then 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, carry out light splitting according to 95:5 to described main signal and standby signal, wherein, the light signal of 95% is for reducing each service signal of inactive side, and the light signal of 5% is used for being converted to second, third signal of telecommunication.
4. the method for claim 1, is characterized in that, the wavelength of described special wavelength light is 1390nm.
5. there is the CWDM system of defencive function, comprise the active side equipment and inactive side equipment that are connected by network, it is characterized in that,
Described active side equipment is provided with specific wavelength photophore and the first coupler, described specific wavelength photophore sends special wavelength light as detection light, described detection light, by after described first coupler and the optical coupling of active side service band, sends to described inactive side equipment by the main channel of the optical link protective disc of the first optical switch on active side equipment or standby passage;
The light signal received is obtained the first detection light by filter filtering by described inactive side equipment, and the first detection light is again coupled to main channel or returns to described active side equipment for passage;
Described first coupler in described active side equipment receives the first detection light fed back through described 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 set, obtain the whether normal judged result of work at present passage, if this signal of telecommunication lower than the threshold value of setting, then 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 first coupler through add drop multiplex filter, and the PIN pipe exported 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, be divided into two through optical branching device after inactive side service signal closes ripple by conjunction ripple dish and form main signal and standby signal, and respectively by main channel and standby channel transfer to active side, in active side, 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, first main signal and first exports the second optical switch to respectively for signal, and first, second detection signal is converted to second, third signal of telecommunication respectively;
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 abnormal, be then switched to relevant work passage by the second optical switch.
8. CWDM system as claimed in claim 7, it is characterized in that, by second, third coupler, according to 95:5, light splitting is carried out to described main signal and standby signal, wherein, the light signal of 95% is for reducing each service signal, and the light signal of 5% is used for being converted to second, third signal of telecommunication.
9. the CWDM system as described in any one of claim 5-8 item, is characterized in that, described active side is 1390nm for detecting the wavelength of the special wavelength light of radiant.
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