CN101150438B - Dense wave division multiplexing system and its optical port automatic discovery method - Google Patents
Dense wave division multiplexing system and its optical port automatic discovery method Download PDFInfo
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Abstract
This invention puts forward a densed WDM system and a method for discovering its optical port automatically, in which, the method includes: 1, an optical receiving party records a first optical power data P[i]0 of each input port, and 1<=i<=n, and n is the input port number of a middle unit, 2, altering the state of a laser in a sending unit and enquiring and recording second power data P[i] of each input port of the optical receiving party, and 1<=i<=n, and n is the input port number of the middle unit, 3, comparing P[i]0 with P[i] to take the jth port over the threshold value of the difference of them as the port connected with the output port of the laser, in which, 1<=j<=n, and n is the input port number of the middle unit and repeating steps 1-3 to get ports connected in at least onelaser orderly.
Description
Technical field
The present invention relates to WDM Wavelength Division Multiplexing (Wavelength-DivisionMultiplexer, be called for short WDM) system, relate in particular to a kind of dense wavelength division multiplexing system and be used for its optical port automatic discovery method.
Background technology
In the WDM Wavelength Division Multiplexing system, along with deepening continuously of user's request, concern for service layer can get more and more, by at first WDM Wavelength Division Multiplexing equipment being come classifying and dividing according to type of site is optical terminus (Optical Terminal, be called for short OTM), optical add/drop multiplexer (Optical add-drop multiplexer, be called for short OADM), and optical line amplifier (Optical Line Multiplexer, be called for short OLA) wait manage outside, progressively change to way to manage based on business, requirement can provide multi-zone supervision to the function of network management subsystem (Subnetwork management system is called for short SNMS), service creation, end end performance, end end alarm etc.Simultaneously, ITU-T G.7718/Y.1709, ITU-T G.8080/Y.1304 in the standard fundamental mechanism of all clear and definite automatic discovery need be based upon physical medium adjacency discovery, layer adjacency discovery, controlled entity logic on the basis of setting up, and the discovery of physical medium syntople is the first step.And this step is must set up corresponding light mouth from network management system earlier to connect, and is searched out the path of some business then according to corresponding annexation by network management system.
Want correctly to obtain professional true path, must guarantee that manual connection of setting up is correct.Because the linking number that need set up at a network element internal is very many, careless slightly will making the mistake, and for manual generally error correction automatically of connection of setting up, need also manually to check that the range request operating personnel that cross of inspection have very high specialized capability and enough patience.If the function that can provide a kind of light mouth to find automatically will improve the maintainability of equipment greatly.For example, simple optical add-drop multiplexer (Opticaladd-drop multiplexer with 10 nodes, be called for short OADM) network, the time that all light mouths of manual configuration connect can surpass 10 hours, and probability of errors can increase along with increasing of linking number; And the method for use this patent, only needs 1/10 or less time.
Summary of the invention
One or more problems in view of the above the present invention proposes a kind of dense wavelength division multiplexing system and are used for its optical port automatic discovery method.By the present invention, can solve present manual configuration network element internal and connect the problem of bringing: require a great deal of time, if, then can cause very serious consequence if the situation of the connection of manual configuration simultaneously and reality is not inconsistent.The present invention will start with from solving the network element internal connection, propose a kind of network element internal is connected to realize the automatic method of finding, effectively improve the operability and the maintainability of equipment.
According to a kind of optical port automatic discovery method that is used for dense wavelength division multiplexing system of the present invention, wherein, dense wavelength division multiplexing system comprises: the light transmitting element has laser function or pump switch function; At least one temporary location, be used to carry out light close wave separater or protection is switched; And light receiving unit, has the luminous power measuring ability, it is characterized in that, light transmitting element, at least one temporary location and light receiving unit carry out optical port automatic discovery successively along optical propagation direction, optical port automatic discovery method may further comprise the steps: S202, light-receiving side write down the first luminous power data P[i of each input port]
0, wherein, 1≤i≤n, n are the input port number of temporary location; S204, the state of a laser in the change light transmitting element, and the second luminous power data P[i of each input port of inquiry and recording light recipient], wherein, 1≤i≤n, n are the input port number of temporary location; And S206, relatively the first luminous power data and the second luminous power data surpass the j port of threshold value as the port that is connected with the output port of laser, wherein with the first luminous power data with the difference of the second luminous power data, 1≤j≤n, n are the input port number of temporary location; Repeat S202 to S206, obtain successively with at least one laser in each port that links to each other.
Wherein, in S204, change the opening and closing state of laser, and change the power of laser.
A kind of dense wavelength division multiplexing system according to the present invention comprises: the light transmitting element has laser function or pump switch function; At least one temporary location is used to receive the light from the light transmitting element, and carry out light close wave separater or protection is switched; And light receiving unit, have the light that reception light transmitting element sends by at least one temporary location, and have the luminous power measuring ability.Wherein, light transmitting element, at least one temporary location and light receiving unit carry out optical port automatic discovery successively along optical propagation direction.
Wherein, the optical port between light transmit leg and the light-receiving side is found to handle and comprised: optical receiving end writes down the first luminous power data P[i of its each input port]
0, wherein, 1≤i≤n, n are the input port number of temporary location; Change the state of a laser in the light transmitting element, the second luminous power data P[i of its each input port is inquired about and write down in light-receiving side], wherein, 1≤i≤n, n are the input port number of temporary location; And the comparison first luminous power data and the second luminous power data, the first luminous power data are surpassed the j port of threshold value as the port that is connected with the output port of laser with the difference of the second luminous power data, wherein, 1≤j≤n, n are the input port number of temporary location.Repeat above the processing, obtain successively with at least one laser in each port that links to each other.
Wherein, the light transmit leg is the light transmitting element, and light-receiving side is first temporary location along optical propagation direction.The light transmit leg is a temporary location, and light-receiving side is the next temporary location along optical propagation direction.The light transmit leg is last temporary location along optical propagation direction, and light-receiving side is a light receiving unit.The light transmitting element changes the opening and closing state of one of them laser.The light transmitting element changes the power of one of them laser.
By dense wavelength division multiplexing system of the present invention and be used for its optical port automatic discovery method, the operability and the maintainability of equipment will be improved greatly.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to dense wavelength division multiplexing system of the present invention;
Fig. 2 is according to the flow chart that is used for the optical port automatic discovery method of dense wavelength division multiplexing system as shown in Figure 1 of the present invention;
Fig. 3 is the schematic diagram of dense wavelength division multiplexing system according to an embodiment of the invention;
Fig. 4 is the schematic diagram of light transmitting element ground port name according to an embodiment of the invention;
Fig. 5 is the schematic diagram of the port name of temporary location according to an embodiment of the invention;
Fig. 6 is the schematic diagram of the port name of light receiving unit according to an embodiment of the invention;
Fig. 7 be according to an embodiment of the invention light transmitting element and " temporary location (1) " be connected the flow chart of finding;
Fig. 8 be according to an embodiment of the invention " temporary location (k) " and " temporary location (k+1) " be connected the flow chart of finding;
Fig. 9 be according to an embodiment of the invention temporary location (m) and light receiving unit be connected the flow chart of finding;
Figure 10 is schematic diagram in accordance with another embodiment of the present invention; And
Figure 11 is flow chart in accordance with another embodiment of the present invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 1 is the rough schematic according to dense wavelength division multiplexing system of the present invention.As shown in Figure 1, dense wavelength division multiplexing system according to the present invention comprises: light transmitting element 102 has at least one laser and pump switch function; At least one temporary location 104 is used to receive the light from the light transmitting element, and carry out light close wave separater or protection is switched; And light receiving unit 106, have the light that reception light transmitting element sends by at least one temporary location, and have the luminous power measuring ability.It is characterized in that light transmitting element, at least one temporary location and light receiving unit carry out optical port automatic discovery successively along optical propagation direction.
Wherein, the light transmit leg is the light transmitting element, and light-receiving side is first temporary location along optical propagation direction.The light transmit leg is a temporary location, and light-receiving side is the next temporary location along optical propagation direction.The light transmit leg is last temporary location along optical propagation direction, and light-receiving side is a light receiving unit.The light transmitting element changes the opening and closing state of one of them laser.The light transmitting element changes the power of one of them laser.
Wherein, the optical port between light transmit leg and the light-receiving side finds to handle the step that adopts as shown in Figure 2.
Fig. 2 is according to the flow chart that is used for the optical port automatic discovery method of dense wavelength division multiplexing system as shown in Figure 1 of the present invention.As shown in Figure 2, the optical port automatic discovery method that is used for dense wavelength division multiplexing system as shown in Figure 1 may further comprise the steps:
S202, light-receiving side write down the first luminous power data P[i of each input port]
0, wherein, 1≤i≤n, n are the input port number of temporary location.
S204, the state of a laser in the change light transmitting element, and the second luminous power data P[i of each input port of inquiry and recording light recipient], wherein, 1≤i≤n, n are the input port number of temporary location.
S206, relatively the first luminous power data and the second luminous power data surpass the j port of threshold value as the port that is connected with the output port of laser, wherein with the first luminous power data with the difference of the second luminous power data, 1≤j≤n, n are the input port number of temporary location.
Repeat S202 to S206, obtain successively with at least one laser in each port that links to each other.
Wherein, in S204, change the opening and closing state of laser, and change the power of laser.
Fig. 3 is the schematic diagram of dense wavelength division multiplexing system according to an embodiment of the invention.As shown in Figure 3, generally can be divided into three classes to each the function veneer in the WDM Wavelength Division Multiplexing from operational angle: light transmitting element, temporary location, and light receiving unit.
For ease of expressing, here the port of light transmitting element, temporary location, light receiving unit to be named, the output port of light transmitting element is SO
iThe light-receiving port of temporary location is Mi
i, temporary location the light transmit port be MO
iThe receiving port of light receiving unit is Ri
iConcrete situation is referring to Fig. 4, Fig. 5, and Fig. 6.Fig. 4 is the schematic diagram of light transmitting element ground port name according to an embodiment of the invention.Fig. 5 is the schematic diagram of the port name of temporary location according to an embodiment of the invention.Fig. 6 is the schematic diagram of the port name of light receiving unit according to an embodiment of the invention.As shown in Figure 4, the title of the output port of light transmitting element is unified is SO
i, (wherein 1≤i≤n, n is total output port number of transmitting element).As shown in Figure 5, the title of the output port of temporary location is unified is MO
i, (wherein 1≤i≤m, m is total output port number of temporary location); The title of the input port of temporary location is unified to be Mi
i, (wherein 1≤i≤n, n is total input port number of temporary location).As shown in Figure 6, the title of the input port of light receiving unit is unified is Ri
i, (wherein 1≤i≤n, n is total input port number of receiving element).Fig. 6 provides the unified Ri of being of title of the input port of light receiving unit
i, (wherein 1≤i≤n, n is total input port number of receiving element).
Wherein, the light transmitting element refers in particular to itself possesses laser or pumping, as the unit of the upstream of business, as optical convering unit (Optical Transponder Unit, abbreviation OTU), sub-speed converges the transmitter side of unit (Transparent-Multiplexer is called for short TMUX) etc.; Temporary location refers to itself and does not possess laser or pumping, the veneer that partial wave or protection such as switch at function that closes of light is provided, as optical multiplexer (Optical Multiplexing Unit, abbreviation OMU), optical branching filter (Optical De-Multiplexing Unit, abbreviation ODU), optical add/drop multiplexer (Optical add-drop Unit, be called for short OAD), light protected location (Optical Protection Unit is called for short OP) etc.; Light receiving unit refers to professional receiving terminal, converges the receiver side of unit etc. as optical convering unit, sub-speed.
Wherein, transmitting element possesses laser or pump switch controlled function, can carry out the switch command that network management system (nms) issues.Temporary location, the receiver side port possesses the luminous power measuring ability, simultaneously, for sending and the corresponding relation of receiving port is that definite relation is arranged under application-specific disposes.Receiving element has the luminous power measuring ability.
As shown in Figure 3, the typical path of a service needed process in the WDM Wavelength Division Multiplexing system of a Typical Disposition: arrive light receiving unit from the light transmitting element then through temporary location (may be one or more), form a complete service route.What wherein bold box was interior is the node of a Typical Disposition: comprise light transmitting element, temporary location (may be one or more), light receiving unit.
Wherein, the light transmitting element: all kinds of service class veneers, converge unit transmitter side etc. as the transmitter side of optical convering unit, sub-speed, and Optical Amplifier Unit (Optical Amplifier Unit is called for short OA); Temporary location: optical device is a channel join-splitting device, and light opens the light or optical cross-matrix etc., has the luminous power measuring ability at defeated light inlet; Light receiving unit: mainly be optical receiver, possess the luminous power measuring ability, converge unit receiver side etc. as the receiver side of optical convering unit, sub-speed.Control unit (comprising network management system): laser switch that can be by laser control unit control transmitting element, and can pass through optical power monitoring: the power that detects each light mouth of temporary location and light receiving unit.Laser: be the light source of transmitting element; The laser control unit: the instruction of receiving network managing system, laser is carried out switch control; Light power meter: be the optical power monitoring part of temporary location or light receiving unit; The optical power monitoring unit: the instruction of receiving network managing system reports the performance number of luminous power; Optical processing unit: the corresponding relation that definite input light and output light are arranged.
Wherein, the principle that the present invention is used: the inside of network element connects to be found and need progressively finish, and from light source, carries out along the direction that light is propagated.
Fig. 7 be according to an embodiment of the invention light transmitting element and " temporary location (1) " be connected the flow chart of finding.As shown in Figure 7, the light transmitting element is found may further comprise the steps with being connected of " temporary location (1) " automatically:
S702, by the laser control unit, the laser state in the initialization light transmitting element.
S704, each input port luminous power situation of inquiry this moment " temporary location (1) " writes down initialized data P[i]
0, (wherein 1≤i≤n, n is the input port number of temporary location).
S706, (m laser for example, corresponding port is SO to change certain laser
m), the light inlet power situation of input port of inquiry temporary location, record data P[i], (wherein 1≤i≤n, n is the input port number of temporary location).
S708, relatively two groups of data satisfy P[j]
0-P[j] difference exceed the j port Mi of pre-set threshold (as 3dB)
jBe and SO
mThe port that port links to each other, (wherein 1≤j≤n, n is the input port number of temporary location).
Repeat S704 to S708, obtain the port that links to each other with remaining laser successively.
The comprehensive above situation that is connected that can obtain light transmitting element and temporary location, i.e. SO
iWith Mi
jConnection situation (1≤i, j≤n).
Fig. 8 be according to an embodiment of the invention " temporary location (k) " and " temporary location (k+1) " be connected the flow chart of finding." temporary location (k) " and the automatic prerequisite of finding of being connected of " temporary location (k+1) ": obtained " temporary location (k) " annexation, (if k=1 shows that then it and being connected of light transmitting element are found with a last link; If k＞1, then the surface it be found with " temporary location (k-1) is connected ").As shown in Figure 8, " temporary location (k) " found may further comprise the steps with being connected of " temporary location (k+1) ":
S802, by the laser control unit, the laser state in the initialization light transmitting element.
S804, each input port luminous power situation of inquiry this moment " temporary location (k+1) ", the optical power value data P[i of " temporary location (k+1) " during the record initialization]
0, (wherein 1≤i≤n, n is the input port number of " temporary location (k+1) ").
S806, the laser state of change transmitting element, certain output port of feasible " temporary location (k) " is (as i port, i.e. MO
m) the luminous power state change (refer to change surpass certain preset threshold), record this moment " temporary location (k+1) " go into optical power value data P[i], (wherein 1≤i≤n, n is the input port number of " temporary location (k+1) ").
S808, relatively two groups of data satisfy P[j]
0-P[j] difference exceed the j port Mi of pre-set threshold (as 3dB)
jBe port MO with " temporary location (k) "
mThe port that links to each other, (wherein 1≤j≤n, n is the input port number of " temporary location (k+1) ").
Repeat S804 to S808, obtain the port that links to each other with remaining " temporary location (k) " successively.
The comprehensive above situation that is connected that can obtain " temporary location (k) " and " temporary location (k+1) ".The i.e. port MO of " temporary location (k) "
iMi with " temporary location (k+1) "
jContinuous relation (1≤i, j≤n).
Fig. 9 be according to an embodiment of the invention temporary location (m) and light receiving unit be connected the flow chart of finding.Temporary location (m) (temporary location of supposing professional process is in respect of m) and the automatic prerequisite of finding of being connected of light receiving unit: obtained " temporary location (k) " annexation with a last link, if (k=1 shows that then it and being connected of light transmitting element are found; If k＞1, then the surface it be found with " temporary location (k-1) is connected ").As shown in Figure 9, temporary location (m) (temporary location of supposing professional process is in respect of m) is found may further comprise the steps with being connected of light receiving unit automatically:
S902, by the laser control unit, the laser state in the initialization light transmitting element.
S904, each input port luminous power situation of inquiry receiving element this moment, the optical power value data P[i of receiving element during the record initialization]
0, (wherein 1≤i≤n, n is the input port number of receiving element).
S906, the laser state of change transmitting element, certain output port of feasible " temporary location (m) " is (as i port, i.e. MO
m) the luminous power state change (refer to change surpass certain preset threshold), record receiving element this moment go into optical power value data P[i], (wherein 1≤i≤n, n is the input port number of receiving element).
S908, relatively two groups of data satisfy P[j]
0-P[j] difference exceed the j port Ri of pre-set threshold (as 3dB)
jBe port MO with " temporary location (m) "
mThe port that links to each other, (wherein 1≤j≤n, n is the input port number of receiving element).
Repeat S904 to S908, obtain the port that links to each other with remaining " temporary location (m) " successively.
The comprehensive above situation that is connected that can obtain " temporary location (m) " and receiving element.The port MO of " temporary location (m) "
iRi with receiving element
jContinuous relation (1≤i, j≤n).
Figure 10 is schematic diagram in accordance with another embodiment of the present invention.Figure 11 is flow chart in accordance with another embodiment of the present invention.As shown in figure 10, suppose the light mouth annexation that needs to find automatically from the optical convering unit of the 1st groove position to optical multiplexer, can adopt step as shown in figure 11 to realize:
S1102 sends instructions under network management system, the laser of the OUT mouth of the optical convering unit of opening/closing the 1st groove position.
S1104, the input optical power value P[i of inquiry optical multiplexer veneer all IN ports this moment] 0, (i≤n).
S1106 sends instructions under network management system, turn-offs/open the laser of OUT mouth of the optical convering unit of the 1st groove position.
S1108, the input optical power value P[i of inquiry optical multiplexer veneer all IN ports this moment], (i≤n).
S1110, compare the array that obtains among STEP2, the STEP4, calculate P[i] 0-P[i] value, for example, as shown above, the OUT mouth that is connected to of its representative links to each other with the IN3 mouth, then can obtain P[3] 0-P[3] difference exceeded threshold value, then can to judge the OUT mouth of the optical convering unit of the 1st groove position be to link to each other with the IN3 light mouth of optical multiplexer to network management system.
S1112, network management system inventory analysis result.
S1114 according to above step, carries out the discovery that is connected of optical convering unit veneer with the optical multiplexer veneer of all the other groove positions again, promptly finishes this time and finds automatically.
By dense wavelength division multiplexing system of the present invention and be used for its optical port automatic discovery method, the operability and the maintainability of equipment will be improved greatly.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. optical port automatic discovery method that is used for dense wavelength division multiplexing system, described dense wavelength division multiplexing system comprises: the light transmitting element has laser function or pump switch function; At least one temporary location, be used to carry out light close wave separater or protection is switched; And light receiving unit, has the luminous power measuring ability, it is characterized in that described smooth transmitting element, described at least one temporary location and described light receiving unit carry out optical port automatic discovery successively along optical propagation direction, described optical port automatic discovery method may further comprise the steps:
S202, light-receiving side write down the first luminous power data P[i of each input port]
0, wherein, 1≤i≤n, n are the input port number of temporary location;
S204 changes the state of a laser in the described smooth transmitting element, and inquires about and write down the second luminous power data P[i of each input port of described light-receiving side], wherein, 1≤i≤n, n are the input port number of temporary location; And
S206, more described first luminous power data and the described second luminous power data, the described first luminous power data are surpassed the j port of threshold value as the port that is connected with the output port of described laser with the difference of the described second luminous power data, wherein, 1≤j≤n, n are the input port number of temporary location;
Repeat S202 to S206, obtain successively with at least one described laser in each port that links to each other.
2. optical port automatic discovery method according to claim 1 is characterized in that, in described S204, changes the opening and closing state of described laser.
3. optical port automatic discovery method according to claim 1 is characterized in that, in described S204, changes the power of described laser.
4. a dense wavelength division multiplexing system is characterized in that, comprising:
The light transmitting element has laser function or pump switch function;
At least one temporary location is used to receive the light from the light transmitting element, and carry out light close wave separater or protection is switched; And
Light receiving unit has the light that the described smooth transmitting element of reception sends by described at least one temporary location, and has the luminous power measuring ability;
Wherein, described smooth transmitting element, described at least one temporary location and described light receiving unit carry out optical port automatic discovery successively along optical propagation direction, and the processing of described optical port automatic discovery comprises:
Described optical receiving end writes down the first luminous power data P[i of its each input port]
0, wherein, 1≤i≤n, n are the input port number of temporary location;
Change the state of a laser in the described smooth transmitting element, the second luminous power data P[i of its each input port is inquired about and write down in described light-receiving side], wherein, 1≤i≤n, n are the input port number of temporary location; And more described first luminous power data and the described second luminous power data,
The j port that the difference of the described first luminous power data and the described second luminous power data is surpassed threshold value is as the port that is connected with the output port of described laser, and wherein, 1≤j≤n, n are the input port number of temporary location;
Repeat above the processing, obtain successively with at least one described laser in each port that links to each other.
5. dense wavelength division multiplexing system according to claim 4 is characterized in that, described smooth transmit leg is described smooth transmitting element, and described light-receiving side is first temporary location along optical propagation direction.
6. dense wavelength division multiplexing system according to claim 4 is characterized in that, described smooth transmit leg is a temporary location, and described light-receiving side is the next temporary location along optical propagation direction.
7. dense wavelength division multiplexing system according to claim 5 is characterized in that, described smooth transmit leg is last temporary location along optical propagation direction, and described light-receiving side is a light receiving unit.
8. according to each described dense wavelength division multiplexing system in the claim 4 to 7, it is characterized in that described smooth transmitting element changes the opening and closing state of one of them laser.
9. according to each described dense wavelength division multiplexing system in the claim 4 to 7, it is characterized in that described smooth transmitting element changes the power of one of them laser.
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| CN107547136A (en) * | 2016-06-23 | 2018-01-05 | 中兴通讯股份有限公司 | A kind of light transmit-receive integrated optical module |
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