CN101919189A - A method and an apparatus to automatically verify connectivity within an optical network node - Google Patents
A method and an apparatus to automatically verify connectivity within an optical network node Download PDFInfo
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- CN101919189A CN101919189A CN2008800002762A CN200880000276A CN101919189A CN 101919189 A CN101919189 A CN 101919189A CN 2008800002762 A CN2008800002762 A CN 2008800002762A CN 200880000276 A CN200880000276 A CN 200880000276A CN 101919189 A CN101919189 A CN 101919189A
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- H—ELECTRICITY
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- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/0206—Express channels arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
- H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
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- H04J14/00—Optical multiplex systems
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- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0221—Power control, e.g. to keep the total optical power constant
- H04J14/02216—Power control, e.g. to keep the total optical power constant by gain equalization
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- H04Q—SELECTING
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- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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Abstract
A method and an apparatus to provide optical equipment protection have been disclosed. In one embodiment, the method includes sending a first optical signal from an optical transceiver to a wavelength switch module (WSM), checking a second optical signal received by the optical transceiver after sending the first optical signal, and determining whether the second optical signal corresponds to the first optical signal. Other embodiments have been claimed and described.
Description
Technical field
The present invention relates to optical network system, more particularly, relate to the connectedness in the optical network node in the automatic checking optical network system.
Background technology
In contemporary optical network system, a plurality of optical network nodes can be coupled to each other via optical fiber.Light signal is transferred to another optical network node by optical fiber from an optical network node.When being installed to optical network node in the optical network system, may pre-configured optical network node.For example, optical fiber must be connected to the input and output port of its corresponding optical network node, so that optical network node can normally be worked.
At present, after connecting optical fiber cable, the light signal that needs to be input to optical network node carries out manual adjustments, and use optical spectrum analyser (OSA) to come the output of measuring light signal at each end that optical fiber connects, so that the input and output light signal is associated, thus the connectedness of checking optical network node.
Because the technology of above configuration optical network node relates to a plurality of manual operations, therefore, it is easy to produce operator's mistake.In addition, owing to must manually regulate, so above technology is not only consuming time but also inconvenient.
Summary of the invention
The present invention includes the method for the connectedness in a kind of automatic checking optical network node.In one embodiment, this method comprises: first light signal is sent to wavelength Switching Module (WSM) from optical transceiver; After sending first light signal, check second light signal that this optical transceiver receives; And determine that whether second light signal is corresponding to first light signal.
According to an aspect of the present invention, provide the method for the connectedness between a kind of checking optical transceiver and the wavelength Switching Module (WSM), this method comprises: first light signal is sent to WSM from optical transceiver; After sending first light signal, check second light signal that this optical transceiver receives; And determine that whether second light signal is corresponding to first light signal.
Can individually or with further feature comprise following exemplary feature in combination.
In an example, described method also can comprise: this optical transceiver is put into first light signal to send to WSM with first light signal, to allow determining that with the processor of this WSM intercommunication coupling whether second light signal is corresponding to first light signal with sign.
Whether described definite second light signal can comprise corresponding to first light signal: before first light signal leaves WSM, change the power of first light signal; And measure second light signal and whether change and change in response to the power of first light signal with the power of determining second light signal.
Described optical transceiver determines whether second light signal can comprise corresponding to first light signal: check whether second light signal comprises described sign.
Described method also can comprise: if second light signal does not comprise sign, then send error messages.
First light signal can enter WSM at the input port of WSM, passes the passage of WSM, and leaves by the output port of WSM, and output port is via the coupling of passage and input port, and and input port between have one.
Described method also can comprise: the wavelength that processor is searched be assigned to passage; And check whether optical transceiver is in the wavelength that is assigned to passage.
Described method also can comprise: if optical transceiver is not to be in the wavelength that is assigned to passage, then the light source with optical transceiver is tuned to the wavelength that is assigned to passage.
Making processor search wavelength can comprise: when the input port at WSM detects first light signal, send interrupt signal to processor.
According to a further aspect in the invention, a kind of machine readable media that is provided with instruction is provided, if described instruction is carried out by processor, then described instruction makes this processor carry out following operation, comprise: in response to interrupt signal from the wavelength Switching Module, discern this wavelength Switching Module, and identification receives the input port of the WSM of first light signal from optical transceiver.
Can individually or with further feature comprise following exemplary feature in combination.
Described operation also can comprise: after sending first light signal, determine whether this optical transceiver has received second light signal; And identification is assigned to the wavelength of the passage among the WSM corresponding with this input port.
Described operation also can comprise: if the light source of optical transceiver is not in the wavelength of this appointment, then this light source is tuned to the wavelength of this appointment.
Described operation also can comprise: if this light source is not in the wavelength of this appointment, then send error messages.
According to a further aspect in the invention, provide a kind of equipment, comprising: wavelength Switching Module (WSM); With the optical transceiver of this WSM coupling, first light signal is sent to this WSM, and after sending this first light signal, detect second light signal that receives from this WSM separably; With the set of one or more processors, it determines automatically in response to each the interrupt signal from this WSM and optical transceiver whether second light signal is corresponding with first light signal.
According to a further aspect in the invention, provide a kind of system, comprising: the optical-fiber network that comprises a plurality of optical fiber; With first optical network node that is coupled to this optical-fiber network, this first optical network node comprises: wavelength Switching Module (WSM); With the optical transceiver of this WSM coupling, first light signal is sent to this WSM, and after sending first light signal, detect second light signal that receives from this WSM separably; With the set of one or more processors, it determines automatically in response to each the interrupt signal from this WSM and optical transceiver whether second light signal is corresponding with first light signal.
Can individually or with further feature comprise following exemplary feature in combination.
Described optical transceiver can comprise: encoder, sign is put into first light signal, to send to WSM with first light signal.
The set of described one or more processors can determine that automatically whether second light signal is corresponding to first light signal in response to this sign.
Described WSM can comprise variable optical attenuator, it changed the power of first light signal before first light signal leaves WSM, this optical transceiver comprises photodetector, and whether its power of measuring second light signal changes in response to first light signal with the power of determining second light signal.
Described optical transceiver can comprise decoder, and it checks whether second light signal comprises this sign.
Described WSM can comprise: input port; Has the output port of one with this input port; With the passage that this input port is coupled to this output port, wherein, first light signal enters WSM at this input port, passes this passage, and leaves by this output port.
Described optical transceiver can comprise light source, and it can be tuned to the wavelength that is assigned to this passage.
According to a further aspect in the invention, provide a kind of method, comprising: first light signal is sent to the input port of wavelength Switching Module (WSM) from optical transceiver, and wherein, first light signal passes WSM via the passage in the WSM; Processor is searched be assigned to the wavelength of this passage; Whether be in the wavelength that is assigned to this passage with this optical transceiver of inspection.
Can individually or with further feature comprise following exemplary feature in combination.
Can processor be searched to be assigned to the wavelength of passage in response to WSM receives first light signal.
Described method also can comprise: if this optical transceiver is not in the wavelength that is assigned to this passage, then the light source with this optical transceiver is tuned to the wavelength that is assigned to this passage.
Describedly make processor search wavelength can to comprise: when the input port at WSM detects first light signal, interrupt signal is sent to this processor.
According to another aspect of the invention, a kind of method that is used for optical network node is provided, comprise: the optical transceiver from optical network node sends the light signal of setted wavelength, wherein, the laser of described optical transceiver is connected to one of a plurality of insertions (add) port on the WSM in a plurality of wavelength Switching Modules (WSM) in the described optical network node, wherein, the optical receiver of described optical transceiver is connected to the branch outbound port of a correspondence in a plurality of telling (drop) port on the described WSM among a plurality of WSM, wherein, at least some WSM among described a plurality of WSM handle the wavelength different with other WSM, this is tracked in configuration information, and wherein, the default configuration of described a plurality of WSM is delivered to corresponding branch outbound port for the light signal that will receive from the insertion end oral instructions; Detect the light signal among the described WSM among a plurality of WSM; Based on the described detection of this light signal, from the definite wavelength of handling by the described WSM a plurality of WSM of configuration information; Detection is in this light signal of this optical transceiver; Described detection is associated to determine that optical transceiver is connected to the described WSM among a plurality of WSM; And the wavelength of determining this light signal whether with a plurality of WSM in a described WSM handle Wavelength matched.
In exemplary execution mode, the wavelength of being handled by each WSM among described a plurality of WSM can be tracked in the configuration information of the WSM of correspondence.
Further feature of the present invention will be apparent from following the drawings and specific embodiments.
Description of drawings
In mode for example and not limitation the present invention is described in the accompanying drawings, wherein identical Reference numeral is represented similar elements, in the accompanying drawings:
Figure 1A illustrates the embodiment of optical network node;
Figure 1B illustrates an embodiment of optical network node
Fig. 1 C illustrates the alternative embodiment of optical network node;
Fig. 2 A illustrates an embodiment of wavelength Switching Module;
Fig. 2 B illustrates the default configuration of an embodiment of construction of switch;
Fig. 3 A-3C illustrates the flow chart of an embodiment of the process of the connectedness in the automatic checking optical network node;
Fig. 4 is illustrated in the optical network node flow chart of an embodiment of the process of wavelength ground detection signal fault one by one; With
Fig. 5 illustrates an embodiment of optical network system.
Embodiment
With the method and apparatus of wavelength ground detection signal fault one by one in the optical network node that is described in the optical network system.In the following description, a plurality of details have been set forth.Yet being appreciated that not to have implementing embodiments of the invention under the situation of these details.In addition, become unclear, do not show known parts, structure and technology in detail in order not make understanding to specification.
Below the some parts of Xiang Ximiaoshuing relates to algorithm and the symbolic representation to the operation of the data bit in the computer storage.These arthmetic statements and be expressed as the instrument that technical staff in the data processing field conveys to the flesh and blood of its work other technical staff in this field most effectively.Here and generally speaking, algorithm is considered to cause the sequence of operation of being in harmony certainly of expected result.Described being operating as need be carried out those operations of physical manipulation to physical quantity.Usually, the form of the electrical or magnetic signal that this tittle adopts and can be stored, shifts, makes up, compares and otherwise handles, but this is optional.Main for general reason, claim that these signals are that bit, value, element, symbol, character, item, numeral etc. prove easily sometimes.
Yet, should remember, all these terms and similarly term be associated with suitable physical quantity, they only are the marks easily that is applied to this tittle.Unless clearly otherwise statement especially in the following discussion, otherwise think, in whole specification, the discussion of utilization such as " processing " or " calculating " or " computing " or " determining " or terms such as " demonstrations " is meant the action and the processing procedure of computer system or similar computing electronics, described computer system or similarly computing electronics handle the data that in the RS of computer system, are represented as physics (electronics) amount, and be memory or register or other such information stores in computer system with this data conversion, be expressed as other data of physical quantity in transmission or the display unit similarly.
The invention still further relates to a kind of apparatus operating as described herein that is used to carry out.Can be for this equipment of purpose special configuration of needs, perhaps it can comprise the all-purpose computer that the computer program that is stored in the computer optionally activates or reconfigures.Such computer program can be stored in the computer-readable recording medium, such as but not limited to: the dish that comprises any kind of floppy disk, CD, CD-ROM and magneto optical disk; Read-only memory (ROM); Random access storage device (RAM); EPROM; EEPROM; Magnetic or optical card; Perhaps be suitable for the medium of any kind of store electrons instruction, every kind of medium all is coupled with computer system bus.
Here the processing procedure that is presented is not relevant with any specific computer or miscellaneous equipment inherently with demonstration.Various general-purpose systems can be used with the program according to the instruction here, and perhaps to carry out the operation described provable be easily to the more special equipment of structure.To understand the desired structure of various these systems according to following description.In addition, the present invention is not described at any specific programming language.To recognize that multiple programming language can be used for realizing instruction of the present invention as described herein.
Machine readable media comprises and is used for storage or transmission has the information of machine (such as, computer) readable form.For example, machine readable media comprises read-only memory (" ROM "); Random access storage device (" RAM "); Magnetic disk storage medium; Optical storage media; Flush memory device; The transmitting signal of electricity, light, sound or other form (such as, carrier wave, infrared signal, digital signal etc.), like that or the like.
Figure 1A illustrates an embodiment of optical network node.Optical network node 100 comprises optical treatment territory 110, light/electricity conversion territory 120 and processor 130.Optical treatment territory 110 can comprise a plurality of wavelength Switching Modules (WSM) 114.Each wavelength Switching Module 114 can comprise a plurality of input and output ports, one or more photodetector 1142 and one or more variable optical attenuator (voa) 1144.Yet, do not show all input and output ports in order to avoid make the schematic diagram of Figure 1A unclear.
With reference to Figure 1A, light/electricity conversion territory 120 comprises a plurality of optical transceivers 124.Each optical transceiver 124 can comprise light source 1242 and optical receiver 1244.In certain embodiments, light source 1242 comprises laser.In addition, laser can be adjustable.
The input that processor 130 receives from WSM 114 and optical transceiver 124, and in response to these input coordination optical treatment territories 110 and light/electricity conversion territory 120.In interchangeable embodiment, processor 130 can comprise a plurality of processing units.
In one embodiment, the light source 1242 in optical transceiver sends to first light signal one of input port of one of WSM 114.Optical receiver 1244 in this optical transceiver receives second light signal from one of output port of this WSM, and determines that whether second light signal is corresponding to first light signal.By related first and second light signals, optical network node is verified the connectedness between light framework 110 and the photoelectricity framework 120 automatically.Below discuss about verifying connective process and the more details of each embodiment of the wavelength ground detection signal process of losing one by one.
Figure 1B illustrates an embodiment of optical network node.Optical network node 1100 comprises a plurality of demodulation multiplexers 140, a plurality of multiplexer 150, a plurality of photodetector 142 and 152, a plurality of smooth crossover network (PXC) 160 and 162 and one or more processor 170.PXC 160 and 162 and processor 170 coupling.With reference to figure 1, do not make schematic diagram unclear for interpretation principle, illustrate in greater detail PXC 160 than another PXC 162.Each PXC 160 and 162 basically can be similar each other.PXC 160 comprises a plurality of WSM, such as WSM 1601,1602,1603 etc.In one embodiment, in a PXC, there are eight WSM.The designated processing presetted wavelength of each WSM1601-1609, this wavelength is also referred to as λ.Photodetector 142 and 152 can comprise that a plurality of photodiodes come the loss of wavelength ground sensed light signal one by one (such as, the loss of light).In addition, should be appreciated that in this manual that phrase " loss of signal ", " loss of optical signal " and " light loss " be interchangeable to be used for representing identical notion.
These a plurality of demodulation multiplexers 140 receive a plurality of light signals that enter 1101.Some signals in the light signal 1101 that enters can be from another optical network node.Perhaps, some signals in the light signal 1101 that enters can be produced from the signal of telecommunication by the photoelectricity framework in the optical network node 1100 (such as, the photoelectricity framework 120 among Figure 1A).Each demodulation multiplexer 140 is light signal 1103 according to wavelength with each light signal that enters 1101 demultiplexing.Wavelength according to light signal 1103 is forwarded to WSM 1601-1609 with them.Signal forwarding to one a predetermined WSM that will have identical wavelength.For example, will have the signal forwarding of λ 1 wavelength to WSM1 1601.Between PXC 160 and demodulation multiplexer 140, light signal 1103 can pass photodetector 142.If photodetector 142 detects the loss of signal in light signal 1103, then photodetector 142 can send alarms or interrupt signal with notification processor 170 to processor 170.
Each of these a plurality of light signals 1103 enters one of WSM1601-1609 via the input port of WSM, and leaves WSM via the output port of correspondence as a plurality of light signals 1105.A plurality of light signals 1105 are forwarded to a plurality of multiplexers 150, and multiplexer 150 carries out multiplexing to export a plurality of light signals 1107 according to the wavelength of light signal 1105 to light signal 1105.Between PXC 160 and a plurality of multiplexer 150, light signal 1105 can pass a plurality of photodetectors 152.If photodetector 152 detects the loss of signal in light signal 1105, then photodetector 152 can send alarms or interrupt signal with notification processor 170 to a plurality of processors 170.
Fig. 1 C illustrates the alternative embodiment of optical network node.Optical network node 1200 comprises a plurality of demodulation multiplexers 140, a plurality of multiplexer 150, a plurality of photodetector 185, PXC 180, one or more add/drop multiplexer (ADM) 190 and one or more processor 170.Should be appreciated that optical network node 1200 can comprise a plurality of PXC.Yet, in Fig. 1 C, only shown a PXC 180 as an example in order to avoid make schematic diagram unclear.PXC 180 comprises a plurality of WSM 1801-1809.In one embodiment, PXC 180 has eight WSM.
These a plurality of demodulation multiplexers 140 receive a plurality of light signals that enter 1101.Each demodulation multiplexer 140 is a plurality of light signals 1103 according to wavelength with each light signal that enters 1101 demultiplexing.According to the wavelength of light signal 1103 light signal 1103 is forwarded to WSM1801-1809 in the PXC 180.Signal with identical wavelength is forwarded to a predetermined WSM.For example, the signal with λ 1 wavelength is forwarded to WSM1 1801.
About PXC 180, each input port via WSM in these a plurality of light signals 1103 enters one of WSM 1801-1809 in the PXC 180, and leaves WSM via the output port of correspondence as a plurality of light signals 1105.Light signal 1105 is forwarded to a plurality of multiplexers 150, and multiplexer 150 carries out multiplexing to light signal 1105 according to the wavelength of light signal 1105, to export a plurality of light signals 1107.
Fig. 2 A illustrates the embodiment of the WSM in the optical network node.WSM 2000 comprises construction of switch 2110, a plurality of photodetector 2120, tap 2130 and variable optical attenuator (voa) 2140.VOA 2140 can be positioned on the identical plate with tap 2130, construction of switch 2110 and photodetector 2120.Perhaps, VOA 2140 can be positioned on the plate of separation.A plurality of outputs of construction of switch 2110 are arrived tap 2130 by optical coupled.Some outputs of tap 2130 are by a plurality of inputs of optical coupled to VOA 2140, and other outputs of tap 2130 are by a plurality of inputs of optical coupled to a plurality of photodetectors 2120.Photodetector 2120 can comprise some photodiodes.
In one embodiment, the size of construction of switch 2110 is 32 * 32.Construction of switch 2110 can comprise four 8 * 8 switches, and wherein, each of 8 * 8 switches all is unblock.Construction of switch 2110 also comprises a plurality of input ports and a plurality of output port.Construction of switch 2110 is via each input port receiving optical signals, and this light signal is forwarded to one of output port.Can derive this light signal from another light signal that is received from another optical network node.Perhaps, can produce this light signal from the signal of telecommunication by the photoelectricity framework of optical network node.Yet, in one embodiment, the signal that WSM 2000 designated processing transmit with predetermined wavelength, therefore, all input optical signals of sending into construction of switch 2110 all have identical wavelength.In one embodiment, the default configuration of construction of switch 2110 is for being connected directly to input port corresponding output port.In such configuration shown in Fig. 2 B.
With reference to figure 2B, for example, the light signal that enters the input port 210 of WSM 200 is transferred to corresponding output port 220 via passage 215.Equally, the light signal that enters input port 230 is transferred to corresponding output port 240 via passage 235.In addition, each of a plurality of input ports of WSM 200 and a plurality of output ports can be configured to insert port or divide outbound port, its receiving optical signals or light signal is outputed to the electric framework of optical network node.
With reference to figure 2A, a plurality of input ports of a plurality of output ports of construction of switch 2110 and tap 2130 are coupled again.The predetermined portions of each light signal that tap 130 will receive from construction of switch 2110 (such as, about 5%) redirect to a plurality of photodetectors 2120.Each photodetector 2120 designated detection is from a certain optical signals of tap 2130.Tap 2130 with the remainder of each light signal (such as, about 95%) send to VOA 2140.In one embodiment, VOA 2140 regulates from the power level of each light signal of tap 2130 receptions.
In response to detecting the loss of signal, one of a plurality of photodetectors 2120 can send signal to a plurality of processors 2190.As discussed above, therefore the light signal of WSM 2000 designated processing predetermined wavelengths, is included in a plurality of photodetectors 2120 and makes it possible to one by one detection signal loss in wavelength ground among the WSM 2000.
Fig. 3 A-3C illustrates the flow chart of embodiment of the process of the connectedness in the optical network node of checking in the optical network system.Carry out this process by processing logic, described processing logic can comprise hardware (such as, circuit, special logic etc.), the combination of software (such as the software that on general-purpose computing system or special purpose machinery, moves) or hardware and software.
With reference to figure 3A, at piece 310, the optical transceiver of the WSM in the light framework of optical network node from the photoelectricity framework of optical network node receives new light signal or detects the predetermined variation level of existing light signal.At piece 312, in response to the variation of new light signal or detected existing light signal, WSM sends interrupt signal 301 to processor.In response to interrupt signal 301, at piece 320, processor is searched allocation list 391 and has been sent interrupt signal 301 to determine which WSM in the optical network node.Then, at piece 322, it is influenced with which port of determining the WSM of identification in piece 320 that processor is searched physical location table 393.At piece 324, processing logic determines whether detect new light signal in the detected light signal transmission of WSM on the receiver port of next optical transceiver then.
Fig. 3 B is illustrated in an embodiment of the process of sensed light signal on the receiver port of optical transceiver.At the beginning, at piece 330, the light source of optical transceiver, for example laser is opened.After light source was opened, at piece 332, optical receiver detected new light signal.At piece 334, processing logic confirms that new light signal is to be caused by the light signal that sends from this light source then.At piece 336, processing logic sends interrupt signal 303 to processor then.In response to interrupt signal 303, at piece 338, processor is searched laser table 395 to determine which optical transceiver has sent interrupt signal 303.Also send interrupt signal 303 in case determine the optical transceiver that sends light signal to WSM, processing logic just turns back to the piece 324 among Fig. 3 A.At piece 324, processing logic is determined to detect new light on the receiver port of optical transceiver then.Processing logic can continue at the piece among Fig. 3 C 341 then.
With reference to figure 3C, at piece 341, the VOA among the WSM of piece 320 identifications of processing logic scalable in Fig. 3 A.At piece 342, the light at the optical transceiver place of the correspondence of piece 338 identifications of processing logic measurement in Fig. 3 B.At piece 344, processing logic determines whether the light signal that optical transceiver receives changes in response to the adjusting of VOA.If the light signal that optical transceiver receives does not change in response to the adjusting of VOA, then at piece 349, processing logic draws the conclusion of associated errors, and therefore, corresponding light framework and the optical fiber malunion between the photoelectricity framework are true.Otherwise processing logic continues at piece 350.Yet, should be appreciated that the process 340 that comprises processing block 341,342 and 344 can be optional process, thereby, needn't in each embodiment of the connective process of checking, all carry out this process 340.
With reference to figure 3C, at piece 350, processing logic makes processor search wavelength table 397 and supports which wavelength with the port of the WSM of definite receiving optical signals again.At piece 352, whether processing logic determines at the wavelength of port Wavelength matched with the light source of the optical transceiver of being discerned then.If their couplings then at piece 359, are associated optical transceiver and WSM, thereby, corresponding light framework and the connectedness between the photoelectricity framework verified.
Yet if wavelength does not match, at piece 352, processing logic checks whether the light source of optical transceiver is adjustable.If light source is non-adjustable, then at piece 349, processing logic is reached a conclusion: the associated errors between optical transceiver and the WSM, thereby, connective incorrect between light framework and the photoelectricity framework.
Otherwise if light source is adjustable, then at piece 356, processing logic is tuned to light source the wavelength of discerning at piece 350.In certain embodiments, if optical network node comprises the protection module that is used for WSM, then at piece 358, whether the protection module that processing logic can be checked WSM transmits the light signal of identical wavelength to determine this protection module with WSM.If the protection module of WSM does not transmit the light signal of identical wavelength with WSM, then at processing block 360, because protection module is by incorrect link, so processing logic can send alarm.Otherwise at piece 359, processing logic is reached a conclusion: optical transceiver is correctly related with the WSM quilt, thereby, verified corresponding light framework and the connectedness between the photoelectricity framework.
Technology described above makes optical network node can verify the connectedness between WSM and the optical transceiver automatically.In addition, in certain embodiments, the light source in the optical transceiver (such as, tunable laser) by automatic tuning to presetted wavelength.Therefore, the possibility of operator's mistake can be greatly diminished.
Fig. 4 is illustrated in the exemplary optical network node flow chart of an embodiment of the process of wavelength ground detection signal fault one by one.Carry out this process by processing logic, described processing logic can comprise hardware (such as, circuit, special logic etc.), the combination of software (such as the software that on general-purpose computing system or special purpose machinery, moves) or hardware and software.
At piece 410, exemplary optical network node receives a plurality of light signals that enter.Processing logic is a plurality of signals (processing block 420) of one group with each light signal demultiplexing that enters according to wavelength.Then, processing logic a plurality of demultiplexed signal that will have an identical wavelength send to the WSM (processing block 430) that is designated as this wavelength.The part that processing logic will be input to each signal of WSM redirect to specific photodetector in the WSM, and the remainder of signal is sent to VOA (processing block 440).In one embodiment, the about 1-5% that enters each light signal of tap a plurality of photodetectors can be redirect to, the 95-99% of each light signal VOA can be forwarded to.
On the one hand, processing logic uses the power level (processing block 450) of the remainder of VOA conditioning signal.Then, processing logic carries out multiplexing (processing block 460) according to the wavelength of a plurality of signals after regulating to the signal after regulating.Can export multiplexing a plurality of signals from optical network node.In one embodiment, processing logic execution dense wave division multipurpose (DWDM) carries out multiplexing to a plurality of signals.
On the other hand, processing logic uses the knuckle section (processing block 470) of a plurality of photodetector detection signals.Whether the processing logic inspection exists any loss of signal (processing block 472).If there is the loss of signal, then the processor of processing logic in optical network node (such as, the processor 112 among the figure IA) sends interrupt signal or alarm (processing block 474).Otherwise processing logic does not send any interrupt signal (processing block 476) to processor.
Fig. 5 shows the optical network system that can use with some embodiments of the present invention.System 500 comprises at least two optical network nodes 510 and 520 and a plurality of optical fiber 530.Optical network node 510 and 520 coupled to each other via optical fiber 530.Optical network node 510 and each comprised light of 520/electricity conversion territory (such as, light/electricity is changed territory 514) in order to receive a plurality of signals of telecommunication and/or a plurality of signals of telecommunication sent to miscellaneous equipment, for example personal computer (PC), server etc.Light/electricity conversion territory is a plurality of light signals with a plurality of electrical signal conversion, and with light signal be input to corresponding optical network node 510 and 520 optical treatment territory (such as, optical treatment territory 512), thus can be via a plurality of optical fiber 530 by optical network system 500 transmitting optical signals.
The various embodiment of optical network node 510 and 520 more than have been described.The process of signal fault that detects in each optical network node 510 and 520 and the embodiment of equipment also have been described in addition.
The hardware of answering any equipment of attention system 500 and being associated can be used among the various embodiment of the present invention.Yet, can recognize that other configuration of optical network system can comprise above disclosed some or all of equipment.
Certain exemplary embodiments of the present invention has only been described in aforementioned discussion.Those skilled in the art will recognize easily from such discussion, accompanying drawing and claims can carry out various modifications under the situation that does not break away from the spirit and scope of the present invention.
Claims (33)
1. connective verification method between optical transceiver and the wavelength Switching Module, this method comprises:
First light signal is sent to the wavelength Switching Module from optical transceiver;
After sending first light signal, check second light signal that this optical transceiver receives; And
Determine that whether second light signal is corresponding to first light signal.
2. method according to claim 1, also comprise: this optical transceiver is put into first light signal to send to the wavelength Switching Module with first light signal, to allow determining that with the processor of this wavelength Switching Module intercommunication coupling whether second light signal is corresponding to first light signal with sign.
3. according to any one the described method among the claim 1-2, wherein, determine whether second light signal comprises corresponding to first light signal:
Before first light signal leaves the wavelength Switching Module, change the power of first light signal; And
Measure second light signal and whether follow change in response to the power change of first light signal with the power of determining second light signal.
4. according to any one the described method among the claim 1-3, wherein, optical transceiver determines whether second light signal comprises corresponding to first light signal: check whether second light signal comprises described sign.
5. according to any one the described method among the claim 1-4, also comprise:, then send error messages if second light signal does not comprise described sign.
6. according to any one the described method among the claim 1-5, wherein, first light signal enters the wavelength Switching Module at the input port of wavelength Switching Module, pass the passage of wavelength Switching Module, and leave by the output port of wavelength Switching Module, this output port has one via described passage and the coupling of described input port and with described input port.
7. according to any one the described method among the claim 1-6, also comprise:
Processor is searched be assigned to the wavelength of described passage; And
Check whether optical transceiver is in the wavelength that is assigned to described passage.
8. according to any one the described method among the claim 1-7, also comprise: if optical transceiver is not to be in the wavelength that is assigned to described passage, then the light source with optical transceiver is tuned to the wavelength that is assigned to described passage.
9. according to claim 7 or 8 described methods, wherein, make processor search wavelength and comprise: when the input port at the wavelength Switching Module detects first light signal, send interrupt signal to described processor.
10. machine readable media that instruction is provided, if described instruction is carried out by processor, then described instruction makes this processor carry out following operation, comprising:
In response to interrupt signal from the wavelength Switching Module,
Discern described wavelength Switching Module, and
Identification receives the input port of the wavelength Switching Module of first light signal from optical transceiver.
11. machine readable media according to claim 10, wherein, described operation also comprises:
After sending first light signal, determine whether this optical transceiver has received second light signal; With
Identification is assigned to the wavelength of the passage in the wavelength Switching Module corresponding with described input port.
12. machine readable media according to claim 11, wherein, described operation also comprises:
If the light source of optical transceiver is not in the wavelength of this appointment, then this light source is tuned to the wavelength of this appointment.
13. machine readable media according to claim 12, wherein, described operation also comprises:
If described light source is not the wavelength that is in this appointment, then send error messages.
14. an equipment comprises:
The wavelength Switching Module;
With the optical transceiver that this wavelength Switching Module is coupled separably, this optical transceiver sends to this wavelength Switching Module with first light signal, and detects second light signal that receives from this wavelength Switching Module after sending first light signal; With
The set of one or more processors, it is in response to each the interrupt signal from this wavelength Switching Module and optical transceiver, to determine that automatically whether second light signal is corresponding to first light signal.
15. equipment according to claim 14, wherein, optical transceiver comprises encoder, and this encoder is put into first light signal with sign, to send to the wavelength Switching Module with first light signal.
16. equipment according to claim 15, wherein, the aggregate response of described one or more processors determines automatically that in described sign whether second light signal is corresponding to first light signal.
17. according to any one the described equipment among the claim 14-16, wherein, described wavelength Switching Module comprises variable optical attenuator, this variable optical attenuator changed the power of first light signal before first light signal leaves this wavelength Switching Module, described optical transceiver comprises photodetector, and whether the power of this photo-detector measurement second light signal changes in response to first light signal with the power of determining second light signal.
18. according to any one the described equipment among the claim 15-17, wherein, described optical transceiver comprises decoder, this decoder is in order to check whether second light signal comprises described sign.
19. according to any one the described equipment among the claim 14-18, wherein, described wavelength Switching Module comprises:
Input port;
Has the output port of one with this input port;
This input port is coupled to the passage of this output port, and wherein, this first light signal enters the wavelength Switching Module at this input port, passes this passage, and leaves by this output port.
20. according to any one the described equipment among the claim 14-19, wherein, described optical transceiver comprises light source, this light source can be tuned to the wavelength that is assigned to described passage.
21. a system comprises:
The optical-fiber network that comprises a plurality of optical fiber; With
Be coupled to first optical network node of this optical-fiber network, this first optical network node comprises:
The wavelength Switching Module;
With the optical transceiver that this wavelength Switching Module is coupled separably, this optical transceiver sends to this wavelength Switching Module with first light signal, and detects second light signal that receives from the wavelength Switching Module after sending first light signal; With
The set of one or more processors is in response to each the interrupt signal from this wavelength Switching Module and this optical transceiver, to determine that automatically whether second light signal is corresponding to first light signal.
22. system according to claim 21, wherein, described optical transceiver comprises encoder, and this encoder is put into first light signal with sign, to send to this wavelength Switching Module with first light signal.
23. system according to claim 22, wherein, the aggregate response of described one or more processors determines that with automatic whether second light signal is corresponding to first light signal in described sign.
24. according to any one the described system among the claim 21-23, wherein, described wavelength Switching Module comprises variable optical attenuator, this variable optical attenuator changed the power of first light signal before first light signal leaves this wavelength Switching Module, described optical transceiver comprises photodetector, and whether the power of this photo-detector measurement second light signal changes in response to first light signal with the power of determining second light signal.
25. according to any one the described system among the claim 22-24, wherein, described optical transceiver comprises decoder, this decoder is in order to check whether second light signal comprises described sign.
26. according to any one the described system among the claim 21-25, wherein, described wavelength Switching Module comprises:
Input port;
Has the output port of one with this input port;
This input port is coupled to the passage of this output port, and wherein, first light signal enters this wavelength Switching Module at this input port, passes this passage, and leaves by this output port.
27. according to any one the described system among the claim 21-26, wherein, described optical transceiver comprises light source, this light source can be tuned to the wavelength that is assigned to described passage.
28. a method comprises:
First light signal is sent to the input port of wavelength Switching Module from optical transceiver, and wherein, first light signal passes this wavelength Switching Module via the passage in this wavelength Switching Module;
Processor is searched be assigned to the wavelength of described passage; And
Check whether this optical transceiver is in the wavelength that is assigned to described passage.
29. method according to claim 28 wherein, receives first light signal in response to this wavelength Switching Module, processor is searched be assigned to the wavelength of described passage.
30. according to claim 28 or 29 described methods, also comprise: if optical transceiver is not in the wavelength that is assigned to described passage, then the light source with this optical transceiver is tuned to the wavelength that is assigned to described passage.
31. according to any one the described method among the claim 28-30, wherein, make this processor search wavelength, comprising: when this input port at this wavelength Switching Module detects first light signal, send interrupt signal to described processor.
32. a method that is used for optical network node comprises:
Optical transceiver from this optical network node sends the light signal of setted wavelength, wherein, the laser of described optical transceiver is connected to one of a plurality of insertion ports on the wavelength Switching Module in a plurality of wavelength Switching Modules in the described optical network node, wherein, the optical receiver of described optical transceiver is connected to the branch outbound port of a correspondence in a plurality of minutes outbound ports on the described wavelength Switching Module in a plurality of wavelength Switching Modules, wherein, at least some wavelength Switching Modules in described a plurality of wavelength Switching Module are handled the wavelength different with other wavelength Switching Module, this is tracked in configuration information, and wherein, the default configuration of described a plurality of wavelength Switching Modules is delivered to corresponding branch outbound port for the light signal that will receive from the insertion end oral instructions;
Detect the light signal in the described wavelength Switching Module in a plurality of wavelength Switching Modules;
Based on the described detection of this light signal, from the definite wavelength of handling by the described wavelength Switching Module a plurality of wavelength Switching Modules of described configuration information;
Detection is in this light signal of described optical transceiver;
Described detection is associated to determine that described optical transceiver is connected to the described wavelength Switching Module in a plurality of wavelength Switching Modules; And
The wavelength of determining described light signal whether with a plurality of wavelength Switching Modules in a described wavelength Switching Module handle Wavelength matched.
33. method according to claim 32 is wherein, tracked in the configuration information of the wavelength Switching Module of correspondence by the wavelength that each the wavelength Switching Module in described a plurality of wavelength Switching Modules is handled.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2008/078025 WO2010036264A1 (en) | 2008-09-26 | 2008-09-26 | A method and an apparatus to automatically verify connectivity within an optical network node |
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| CN2008800002762A Pending CN101919189A (en) | 2008-09-26 | 2008-09-26 | A method and an apparatus to automatically verify connectivity within an optical network node |
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| WO (1) | WO2010036264A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431551A (en) * | 2015-04-13 | 2017-12-01 | 华为技术有限公司 | The method that optical cross connection node and optical signal exchange |
| CN110798281A (en) * | 2015-11-11 | 2020-02-14 | 瞻博网络公司 | Method and apparatus for flattening data center networks employing wavelength agnostic endpoints |
| CN111989878A (en) * | 2018-07-18 | 2020-11-24 | 谷歌有限责任公司 | Connectivity verification testing and topology discovery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10313046B2 (en) | 2015-06-17 | 2019-06-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Verifying configuration in wavelength selective switching node |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495358A (en) * | 1992-11-23 | 1996-02-27 | Hewlett-Packard Company | Optical transceiver with improved range and data communication rate |
| US7174066B1 (en) * | 2004-02-23 | 2007-02-06 | Intellambda Systems, Inc. | Method and an apparatus to detect signal failure on a per wavelength basis |
-
2008
- 2008-09-26 WO PCT/US2008/078025 patent/WO2010036264A1/en active Application Filing
- 2008-09-26 CN CN2008800002762A patent/CN101919189A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431551A (en) * | 2015-04-13 | 2017-12-01 | 华为技术有限公司 | The method that optical cross connection node and optical signal exchange |
| CN107431551B (en) * | 2015-04-13 | 2019-02-05 | 华为技术有限公司 | The method of optical cross connection node and optical signal exchange |
| US10291971B2 (en) | 2015-04-13 | 2019-05-14 | Huawei Technologies Co., Ltd. | Optical cross-connect node and optical signal switching method |
| CN110798281A (en) * | 2015-11-11 | 2020-02-14 | 瞻博网络公司 | Method and apparatus for flattening data center networks employing wavelength agnostic endpoints |
| CN110798281B (en) * | 2015-11-11 | 2021-07-16 | 瞻博网络公司 | Method and apparatus for flattening data center networks employing wavelength agnostic endpoints |
| CN111989878A (en) * | 2018-07-18 | 2020-11-24 | 谷歌有限责任公司 | Connectivity verification testing and topology discovery |
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| WO2010036264A1 (en) | 2010-04-01 |
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