WO2014021075A1 - 波長多重化装置、障害発生箇所特定方法およびプログラム - Google Patents
波長多重化装置、障害発生箇所特定方法およびプログラム Download PDFInfo
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- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
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- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
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- 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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- H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
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Definitions
- the present invention relates to a wavelength multiplexing apparatus, a failure occurrence location specifying method, and a program, and more particularly to a wavelength multiplexing device that can effectively specify a failure occurrence location.
- a network that performs all network functions such as transmission, multiplexing, demultiplexing, switching, and path control using only optical technology (without converting optical signals into electrical signals) is called a photonic network.
- optical fibers were used for the transmission path and optical amplifiers were used for signal amplification.
- circuit switching switching
- the optical signals were converted into electrical signals once and then electrically I had to do it.
- the communication capacity of the network is limited by the performance of the switching device.
- FIG. 4 is an explanatory diagram showing a configuration of a wavelength multiplexing apparatus 900 (CDC®ROADM: Colorless / Directionless / Contentionless Reconfigurable Optical Add / Drop Multiplexer) according to an existing optical switching technology.
- the wavelength multiplexing apparatus 900 is connected to WDM routes 901, 902, and 903, which are a plurality of optical lines, and inputs / outputs optical signals to / from each WDM route.
- a signal from each WDM route is sent to a transponder 921, 922, 923 that converts a transmission signal from each client between an electric signal and an optical signal through a separation / switching module 910 (Split & Select Module). Input / output.
- a path between the separation / switching module 910 and each transponder 921, 922, 923 is referred to as a client accommodation path.
- WDM routes 901, 902, and 903 and three transponders 921, 922, and 923 are shown for reasons of space, but in reality, more WDM routes and more A transponder may be connected, and the number of WDM routes and the number of transponders need not be equal.
- the separation / switching module 910 includes an optical coupler 911 corresponding to the transmission optical signal and the reception optical signal of each WDM route, and an optical switch 912 corresponding to the transmission optical signal and the reception optical signal of each transponder.
- Each optical signal input from the WDM path 901 is demultiplexed by the demultiplexer 901a, and each optical signal combined by the multiplexer 901b is input to the WDM path 901.
- the other duplexers 902a and 903a and the multiplexers 902b and 903b are also connected to the other WDM routes 902 and 903.
- the output optical signal from the demultiplexer 901a in the WDM path 901 is input to the optical coupler 911a, the multiplexer 902b in the WDM path 902, and the multiplexer 903b in the WDM path 903.
- the output optical signal from the demultiplexer 902a in the WDM path 902 is input to the optical coupler 911b, the multiplexer 901b in the WDM path 901, and the multiplexer 903b in the WDM path 903.
- the output optical signal from the demultiplexer 903a in the WDM path 903 is input to the optical coupler 911c, the multiplexer 901b in the WDM path 901, and the multiplexer 902b in the WDM path 902.
- the multiplexer 901b in the WDM path 901 combines the output optical signals from the optical coupler 911d, the demultiplexer 902a in the WDM path 902, and the demultiplexer 903a in the WDM path 903. Transmit to the WDM route 901.
- the multiplexer 902b in the WDM path 902 combines the output optical signals from the optical coupler 911e, the demultiplexer 901a in the WDM path 901, and the demultiplexer 903a in the WDM path 903. Wave and transmit to WDM route 902.
- the multiplexer 903b in the WDM path 903 combines the output optical signals from the optical coupler 911f, the demultiplexer 901a in the WDM path 901, and the demultiplexer 902a in the WDM path 902 to WDM Transmit to path 903.
- Each of the optical switches 912a to 912c selects one of the output optical signals from the demultiplexers 901b to 903b of the WDM routes 901 to 903, and inputs them to the transponders 921 to 923.
- Each of the optical switches 912d to 912f outputs the output optical signal from the transponders 921 to 923 by selecting any one of the multiplexers 901a to 903a of the WDM paths 901 to 903.
- the optical switch 912a selects the optical signal sent from the optical coupler 911a and sets the drop path. It is good to build.
- the optical switch 912d selects to output the optical signal toward the optical coupler 911d, and an add path is added. It is good to build.
- Non-Patent Document 2 a wavelength multiplexing device 900 in 2011 as one corresponding to 100 Gbps Ethernet (registered trademark) (Non-Patent Document 2), and further increase the speed and capacity. Aiming at technological development.
- Patent Document 1 describes an optical node system that makes it possible to perform network function expansion and failure handling at low cost by using an optical n ⁇ n switch.
- Non-Patent Document 1 summarizes recent trends in photonic networks as described above.
- Non-Patent Document 2 describes a wavelength multiplexing apparatus compatible with 100 Gbps Ethernet that has been commercialized by the inventors as described above.
- Patent Document 1 is a technique for avoiding a failure and continuing communication when a failure occurs, and is not a technology for specifying a location where the failure has occurred. Also, Non-Patent Documents 1 and 2 do not describe a technique that can solve the above problem.
- An object of the present invention is to provide a wavelength multiplexing apparatus, a failure location identification method, and a program that can effectively identify whether a failure occurrence location is on either side of the separation / switching module.
- a wavelength multiplexing apparatus is connected to a plurality of or a single system optical line and a plurality or a single system optical transceiver, and is provided between the optical line and the optical transceiver.
- a wavelength multiplexing device for inputting and outputting optical signals, the first optical switch for outputting the optical signal input from the optical line to the optical transceiver, and the optical signal input from the optical transceiver as the optical line
- a local optical loopback circuit that feeds back an optical signal input from the optical transceiver to the optical transceiver and outputs the optical signal.
- the fault occurrence location identifying method according to the present invention is connected to a plurality of systems of optical lines and optical transceivers, and separates and inputs / outputs optical signals between the optical lines and the optical transceivers.
- the separation / switching module is a local optical loopback circuit that feeds back an optical signal input from the optical transmitter / receiver to the optical transmitter / receiver and outputs the signal, and an input from the optical line
- a first optical switch that selectively outputs an optical signal that has been fed back or an optical signal that has been fed back by a local optical loopback circuit to an optical transceiver by a switching operation from the outside, and an optical signal that is input from the optical transceiver
- One of the optical lines, or a second optical switch that selectively outputs to the local optical loopback circuit by a switching operation from the outside is provided in advance.
- a module inspection unit that operates in response to an external operation command is also provided, and the first optical switch is switched so that the optical signal fed back by the local optical loopback circuit is output to the optical transceiver.
- the second optical switch is controlled to output the optical signal input from the optical transceiver to the local optical loopback circuit, and then the optical transceiver is activated to transmit the optical signal.
- the module inspection unit executes each of the above control operations for determining whether or not the optical signal fed back by the local optical loopback circuit is received by the optical transceiver.
- the failure location program according to the present invention is connected to a plurality of optical lines and optical transceivers, and separates and switches optical signals between the optical lines and the optical transceivers.
- the separation / switching module is input from an optical line and a local optical loopback circuit that outputs an optical signal input from the optical transmitter / receiver by feeding back to the optical transmitter / receiver side.
- a first optical switch that selectively outputs to the optical transceiver by an external switching operation, and an optical signal input from the optical transceiver.
- a module inspection unit that operates in response to an external operation command is also provided, and the optical signal fed back by the local optical loopback circuit is output to the optical transceiver to the processor provided in the module inspection unit
- the present invention includes a local optical loopback circuit that outputs an optical signal input from the optical transceiver to the optical transceiver side and outputs it. It is possible to provide a wavelength multiplexing apparatus, a fault occurrence location specifying method, and a program having an excellent feature that it is possible to effectively specify which side is before or after the module.
- the wavelength multiplexing apparatus 100 is connected to a plurality of optical lines (WDM paths 101 to 103) and optical transceivers (transponders 21 to 23), and between the optical lines and the optical transceivers.
- This is a wavelength multiplexing device for inputting and outputting optical signals.
- the wavelength multiplexing apparatus 100 includes first optical switches 12a to 12c that output optical signals input from the optical line to the optical transceiver, and a second optical switch that outputs optical signals input from the optical transceiver to the optical line. And a local optical loopback circuit 13 that feeds back an optical signal input from the optical transceiver to the optical transceiver side and outputs it.
- the first optical switches 12a to 12c selectively output the optical signal input from the optical line or the optical signal fed back by the local optical loopback circuit to the optical transceiver by the switching operation from the outside
- the second optical switches 12d to 12f selectively output an optical signal input from the optical transceiver to one system in the optical line or a local optical loopback circuit by an external switching operation.
- the wavelength multiplexing apparatus 100 also includes first optical couplers 11a to 11c for branching an optical signal input from the optical line for each optical line and outputting the branched optical signal to each optical transceiver, and each optical transmission / reception unit.
- Each optical device includes second optical couplers 11d to 11f that multiplex optical signals input from the optical transceiver and output the optical signals to the optical lines.
- the wavelength multiplexing apparatus 100 switches the first optical switch to output the optical signal fed back by the local optical loopback circuit to the optical transceiver, In parallel, the second optical switch is switched so that the optical signal input from the optical transceiver is output to the local optical loopback circuit, and then the optical signal is transmitted to the optical transceiver and fed back by the local optical loopback circuit.
- a module inspection unit 40 for determining whether or not the received optical signal is received by the optical transceiver is provided.
- the wavelength multiplexing apparatus 100 can effectively identify which side of the separation / switching module 10 is before and after the failure occurrence location. Hereinafter, this will be described in more detail.
- FIG. 1 is an explanatory diagram showing a configuration of a wavelength multiplexing apparatus 100 (CDC®ROADM: Colorless / Directionless / Contentionless Reconfigurable Optical Add / Drop Multiplexer) according to the first embodiment of the present invention.
- the wavelength multiplexing apparatus 100 is connected to WDM routes 101, 102, and 103, which are optical lines of a plurality of systems, and inputs / outputs optical signals to / from each WDM route.
- Signals from the respective WDM routes are transmitted to the transponders 21, 22, and 23 that mutually convert the transmission signals from the respective clients between electrical signals and optical signals through the separation / switching module 10 (Split & Select Module). Input / output.
- a path between the separation / switching module 10 and each transponder 21, 22, 23 is referred to as a client accommodation path.
- FIG. 1 shows three WDM routes 101, 102, and 103, and three transponders 21, 22, and 23, respectively, due to space limitations, but in actuality, more WDM routes and more A transponder may be connected, and the WDM route and the number of transponders need not be equal.
- the separation / switching module 10 includes an optical coupler 11 corresponding to the transmission optical signal and the reception optical signal of each WDM route, and an optical switch 12 corresponding to the transmission optical signal and the reception optical signal of each transponder.
- Each optical signal input from the WDM path 101 is demultiplexed by the demultiplexer 101a, and each optical signal combined by the multiplexer 101b is input to the WDM path 101.
- the other duplexers 102a and 103a and the multiplexers 102b and 103b are also connected to the other WDM routes 102 and 903.
- the output optical signal from the demultiplexer 101 a in the WDM path 101 is input to the optical coupler 11 a, the multiplexer 102 b in the WDM path 102, and the multiplexer 103 b in the WDM path 103.
- the output optical signal from the demultiplexer 102 a in the WDM path 102 is input to the optical coupler 11 b, the multiplexer 101 b in the WDM path 101, and the multiplexer 103 b in the WDM path 103.
- the output optical signal from the demultiplexer 103 a in the WDM path 103 is input to the optical coupler 11 c, the multiplexer 101 b in the WDM path 101, and the multiplexer 102 b in the WDM path 102.
- the multiplexer 101b in the WDM path 101 multiplexes output optical signals from the optical coupler 11d, the demultiplexer 102a in the WDM path 102, and the demultiplexer 103a in the WDM path 103. Transmit to the WDM route 101.
- the multiplexer 102b in the WDM path 102 combines the output optical signals from the optical coupler 11e, the demultiplexer 101a in the WDM path 101, and the demultiplexer 103a in the WDM path 103. Wave and transmit to WDM path 102.
- the multiplexer 103b in the WDM path 103 multiplexes the output optical signals from the optical coupler 11f, the demultiplexer 101a in the WDM path 101, and the demultiplexer 102a in the WDM path 102 to WDM direction. Transmit to path 103.
- the configuration is the same as that of the wavelength multiplexing apparatus 900 according to the above-described existing technology, but the separation / switching module 10 included in the wavelength multiplexing apparatus 100 according to the present embodiment further includes two optical couplers 11g. And 11h. Since the output optical signal from the optical coupler 11h is directly connected as the input optical signal of the optical coupler 11g, these optical couplers 11g and 11h are also collectively referred to as a local optical loopback circuit 13.
- Each of the optical switches 12a to 12c selects one of the output optical signals from the demultiplexers 101b to 103b and the optical coupler 11g of the WDM paths 101 to 103 and inputs the selected one to the transponders 21 to 23.
- Each of the optical switches 12d to 12f outputs the output optical signal from the transponders 21 to 23 by selecting one of the multiplexers 101a to 103a and the optical coupler 11h of the WDM paths 101 to 103. To do.
- the module inspection unit 40 is a microcomputer or a single computer device including a processor 41 that is a main body for operating a computer program, and is connected to the separation / switching module 10.
- the inspection program is started by the processor 41, and the processor 41 functions as the inspection means 43.
- the module inspection unit 40 includes, for example, a storage unit, a communication unit, and the like. However, these are not specifically described because they are not particularly necessary for explaining the present invention.
- the inspection means 43 issues a control signal for switching the optical signal to the optical switches 12a to 12f.
- a control signal for outputting light is also transmitted to the transponders 21 to 23, and the intensity and wavelength of the input optical signal are received from the transponders 21 to 23.
- FIG. 2 is a flowchart showing an operation of identifying whether the failure occurrence location is before or after the separation / switching module 10 in the wavelength multiplexing apparatus 100 shown in FIG.
- the inspection means 43 having started the operation first outputs the optical switches 12d to f so that the output optical signal from the transponders 21 to 23 to be inspected is output to the optical coupler 11h (local optical loopback circuit 13). The corresponding one is switched (step S201).
- the inspection means 43 returns the output optical signal from the optical coupler 11g (local optical loopback circuit 13) to the input side of the inspection target transponders 21 to 23 from the optical switches 12a to 12c. The corresponding one is switched (step S202). Up to this point, loopback on the local side has been completed for the transponder to be inspected.
- the inspection means 43 outputs light to the transponders 21 to 23 to be inspected (step S203), and the optical signal returned through the local optical loopback circuit 13 is input to the transponders 21 to 23. It is determined whether or not (step S204).
- step S205 If no optical signal is input, it can be determined that there is an abnormality in the client accommodation path before the separation / switching module 10 (step S205). If an optical signal is input, it can be determined that there is an abnormality on the WDM path 101 to 103 side from the separation / switching module 10 (step S206). The above judgment result is presented to the user via the input / output means 42 (step S207), and the operation of the inspection means 43 ends.
- the inspection unit 43 causes the optical switch 12d to output the optical signal output from the transponder 21. It switches so that it may output with respect to the optical coupler 11h. Then, since the optical signal output here returns to the optical coupler 11g, the inspection unit 43 causes the optical switch 12a to input the output optical signal from the optical coupler 11g to the transponder 21 in step S202. Switch.
- the optical loopback is incomplete and the output optical signal does not return to the input side. It is obvious that there is an abnormality.
- the client accommodation path between the other transponders 22 and 23 and the separation / switching module 10 the presence or absence of abnormality can be confirmed in the same manner.
- the fault location identifying method includes a separation / switching module 10 that is connected to a plurality of optical lines and optical transceivers and that inputs and outputs optical signals between the optical lines and the optical transceivers.
- the separation / switching module 10 feeds back an optical signal input from the optical transmitter / receiver to the optical transmitter / receiver side and outputs it, and input from the optical line.
- First optical switches 12a to 12c for selectively outputting an optical signal or an optical signal fed back by a local optical loopback circuit to an optical transceiver by a switching operation from the outside, and an optical signal input from the optical transceiver
- the second optical switch 12d to selectively output to one system of the optical lines or to the local optical loopback circuit by an external switching operation.
- a module inspection unit 40 that operates in response to an operation command from the outside, and the optical signal fed back by the local optical loopback circuit is output to the optical transceiver.
- the first optical switch is switched and controlled (FIG. 2, step S201), and the second optical switch is switched and controlled so as to output the optical signal input from the optical transceiver to the local optical loopback circuit in parallel with this (step S201 in FIG. 2).
- Step S202 in FIG. 2 the optical transceiver is operated to transmit an optical signal
- Step S203 the optical transceiver is operated to transmit the optical signal
- step S204 in FIG. 2 the local optical loopback circuit Whether or not the returned optical signal is received by the optical transceiver is controlled
- each of the above-described operation steps may be programmed to be executable by a computer, and may be executed by the processor 41 of the module inspection unit 40 that directly executes each of the steps.
- the program may be recorded on a non-temporary recording medium, such as a DVD, a CD, or a flash memory. In this case, the program is read from the recording medium by a computer and executed.
- the present embodiment when a failure occurs in the wavelength multiplexing apparatus, it is possible to reliably and easily specify which side is before or after the separation / switching module. At that time, it is not necessary to perform complicated operations such as manually attaching / detaching an optical cable or switching a transmission system, and a special measuring instrument is not required.
- the inspection can be easily performed simply by instructing the module inspection unit 40 to execute the inspection.
- the module inspection unit 40 does not have to be directly connected to the wavelength multiplexing apparatus 100, and it is of course possible to remotely operate the wavelength multiplexing apparatus 100 through a network or the like. If maintenance by remote operation is possible, it is possible to greatly reduce the labor and cost for maintenance.
- this local optical loopback circuit does not need to be provided for each system of the transponders 21 to 23. If there is only one system in the entire wavelength multiplexing apparatus 100, it can be shared by all systems. is there. Therefore, it is possible to greatly reduce the cost of the apparatus and further contribute to miniaturization and cost reduction.
- the wavelength multiplexing apparatus 300 is a remote light that outputs an optical signal input from the optical line by returning it to the optical line side.
- a loopback circuit 314 is provided, and the first optical switches 11a to 11c selectively transmit the optical signal input from the optical line or the optical signal fed back by the local optical loopback circuit by an external switching operation.
- the second optical switch 11d to 11f outputs the optical signal input from the optical transceiver or remote optical loopback circuit to any one of a plurality of optical lines.
- the local optical loopback circuit is selectively output by an external switching operation.
- FIG. 3 is an explanatory diagram showing the configuration of the wavelength multiplexing apparatus 300 according to the second embodiment of the present invention.
- the wavelength multiplexing apparatus 300 has the same configuration as that of the wavelength multiplexing apparatus 100 according to the first embodiment described above, and therefore, common parts may have the same names and reference numbers, and descriptions thereof will be omitted. I will do it.
- the separation / switching module 310 included in the wavelength multiplexing apparatus 300 further includes two optical switches 312g and 312h in addition to the configuration described in the first embodiment. Since the output optical signal from the optical switch 312g is directly connected as the input optical signal of the optical switch 312h, these optical switches 312g and 312h are also collectively referred to as a remote optical loopback circuit 314.
- the optical switch 312g uses the remote optical loopback circuit described above to output the optical signal from the optical coupler 11a. It switches so that it may output with respect to optical switch 312h. Then, the optical switch 312h switches to output this optical signal to the optical coupler 11d.
- a wavelength multiplexing device that is connected to a plurality of or a single system optical line and a plurality of or a single system optical transceiver, and is provided between the optical line and the optical transceiver to input and output an optical signal.
- a first optical switch that outputs an optical signal input from the optical line to the optical transceiver;
- a second optical switch that outputs an optical signal input from the optical transceiver to the optical line;
- a wavelength multiplexing apparatus comprising a local optical loopback circuit that feeds back an optical signal input from the optical transceiver to the optical transceiver and outputs the signal.
- the first optical switch selectively transmits an optical signal input from the optical line or an optical signal fed back by the local optical loopback circuit to the optical transceiver by an external switching operation. It has a function to output,
- the second optical switch has a function of selectively outputting an optical signal input from the optical transceiver to one of the optical lines or to the local optical loopback circuit by an external switching operation.
- the 1st optical coupler which branches the optical signal input from the said optical path for every each said optical path, and outputs it with respect to each said 1st optical switch, A second optical coupler that multiplexes the optical signals input from the second optical switch and outputs the optical signals to the optical lines for each of the second optical switches.
- a module inspection unit that operates in response to an external operation command is provided.
- This module inspection section A function of switching and controlling the first optical switch so as to output the optical signal fed back by the local optical loopback circuit to the optical transceiver;
- the function of switching and controlling the second optical switch so as to output the optical signal input from the optical transceiver to the local optical loopback circuit;
- the optical transmitter / receiver thereafter transmits an optical signal, and has a function of determining and controlling whether or not the optical signal fed back by the local optical loopback circuit is received by the optical transmitter / receiver.
- the wavelength multiplexing device according to appendix 2.
- the first optical switch selectively transmits the optical signal input from the optical line or the optical signal fed back by the local optical loopback circuit by an external switching operation.
- the second optical switch is configured to switch an optical signal input from the optical transceiver or the remote optical loopback circuit to any one of the optical lines or to the local optical loopback circuit from the outside.
- the separation / switching module includes a local optical loopback circuit that outputs an optical signal input from the optical transmitter / receiver by feeding back to the optical transmitter / receiver side, and an optical signal input from the optical line or the local optical loop.
- a first optical switch for selectively outputting an optical signal fed back by a back circuit to the optical transceiver by a switching operation from the outside; and an optical signal input from the optical transceiver among the optical lines.
- a second optical switch that selectively outputs to the local optical loopback circuit by an external switching operation
- a module inspection unit that operates in response to an external operation command With Switching and controlling the first optical switch so as to output the optical signal fed back by the local optical loopback circuit to the optical transceiver;
- the second optical switch is controlled so as to output the optical signal input from the optical transceiver to the local optical loopback circuit, Thereafter, the optical transceiver is operated to transmit an optical signal, and it is determined whether or not the optical signal fed back by the local optical loopback circuit is received by the optical transceiver.
- a fault occurrence location identifying method wherein the module inspection unit executes each of the control operations described above.
- a wavelength multiplexing apparatus including a separation / switching module that is connected to a plurality of optical lines and an optical transceiver and inputs / outputs an optical signal between the optical line and the optical transceiver
- the separation / switching module includes a local optical loopback circuit that outputs an optical signal input from the optical transmitter / receiver by feeding back to the optical transmitter / receiver side, and an optical signal input from the optical line or the local optical loop.
- a first optical switch for selectively outputting an optical signal fed back by a back circuit to the optical transceiver by a switching operation from the outside; and an optical signal input from the optical transceiver among the optical lines.
- a second optical switch that selectively outputs to the local optical loopback circuit by an external switching operation, and a module inspection unit that operates in response to an external operation command
- the processor provided in the module inspection unit, Switching the first optical switch to output the optical signal fed back by the local optical loopback circuit to the optical transceiver;
- the present invention is suitable for application to a wavelength multiplexing apparatus, particularly ROADM (Reconfigurable Optical Add / Drop Multiplexer).
- ROADM Reconfigurable Optical Add / Drop Multiplexer
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Abstract
Description
以下、本発明の第1の施形態の構成について添付図1に基づいて説明する。
最初に、本実施形態の基本的な内容について説明し、その後でより具体的な内容について説明する。
本実施形態に係る波長多重化装置100は、複数系統の光線路(WDM方路101~103)および光送受信器(トランスポンダ21~23)と接続され、当該光線路と光送受信器との間で光信号を入出力する波長多重化装置である。この波長多重化装置100は、光線路から入力された光信号を光送受信器に出力する第1の光スイッチ12a~cと、光送受信器から入力された光信号を光線路に出力する第2の光スイッチ12d~fとを備え、光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路13とを設けている。
以下、これをより詳細に説明する。
次に、上記の実施形態の全体的な動作について説明する。
本実施形態に係る障害発生箇所特定方法は、複数系統の光線路および光送受信器と接続され、当該光線路と光送受信器との間で光信号を入出力する分離・切り替えモジュール10を備える波長多重化装置100にあって、分離・切り替えモジュール10は、光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路13と、光線路から入力された光信号もしくはローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に光送受信器に出力する第1の光スイッチ12a~cと、光送受信器から入力された光信号をの光線路のうちの1系統、もしくはローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する第2の光スイッチ12d~fとを予め備えるものであると共に、外部からの操作指令に応じて動作するモジュール検査部40を併設した構成とし、ローカル光ループバック回路で帰還させられた光信号を光送受信器に出力するよう第1の光スイッチを切り替え制御し(図2・ステップS201)、これと並行して光送受信器から入力された光信号をローカル光ループバック回路に出力するよう第2の光スイッチを切り替え制御し(図2・ステップS202)、その後で光送受信器を稼働させて光信号を発信させ(図2・ステップS203)、その後で光送受信器を稼働させて光信号を発信させ、ローカル光ループバック回路で帰還させられた光信号が光送受信器で受信された否かを判断制御する(図2・ステップS204)、上記の各制御動作をモジュール検査部40が実行する。
この動作により、本実施形態は以下のような効果を奏する。
本発明の第2の実施形態に係る波長多重化装置300は、第1の実施形態として説明した構成に加えて、光線路から入力された光信号を当該光線路側に帰還させて出力するリモート光ループバック回路314を備えると共に、第1の光スイッチ11a~cが、光線路から入力された光信号もしくはローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に光送受信器もしくはリモート光ループバック回路に出力し、第2の光スイッチ11d~fが、光送受信器もしくはリモート光ループバック回路から入力された光信号を複数系統の光線路のうちのいずれか1系統、もしくはローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する構成とした。
以下、これをより詳細に説明する。
前記光線路から入力された光信号を前記光送受信器に出力する第1の光スイッチと、
前記光送受信器から入力された光信号を前記光線路に出力する第2の光スイッチとを備え、
前記光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路を設けた
ことを特徴とする波長多重化装置。
前記第2の光スイッチが、前記光送受信器から入力された光信号を前記光線路のうちの1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する機能を備える
ことを特徴とする、付記1に記載の波長多重化装置。
前記各第2の光スイッチごとに当該第2の光スイッチから入力された光信号を合波して前記各光線路に対して出力する第2の光カプラと
を有することを特徴とする、付記2に記載の波長多重化装置。
このモジュール検査部が、
前記ローカル光ループバック回路で帰還させられた光信号を前記光送受信器に出力するよう前記第1の光スイッチを切り替え制御する機能と、
これと並行して前記光送受信器から入力された光信号を前記ローカル光ループバック回路に出力するよう前記第2の光スイッチを切り替え制御する機能と、
その後で前記光送受信器に光信号を発信させ、前記ローカル光ループバック回路で帰還させられた光信号が前記光送受信器で受信された否かを判断制御する機能とを有することを特徴とする、付記2に記載の波長多重化装置。
前記第1の光スイッチが、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器もしくは前記リモート光ループバック回路に出力する機能を備え、
前記第2の光スイッチが、前記光送受信器もしくは前記リモート光ループバック回路から入力された光信号を前記光線路のうちのいずれか1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する機能を備える
ことを特徴とする、付記2に記載の波長多重化装置。
前記分離・切り替えモジュールは、前記光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路と、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器に出力する第1の光スイッチと、前記光送受信器から入力された光信号を前記の光線路のうちの1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する第2の光スイッチとを予め備えるものであると共に、外部からの操作指令に応じて動作するモジュール検査部を併設した構成とし、
前記ローカル光ループバック回路で帰還させられた光信号を前記光送受信器に出力するよう前記第1の光スイッチを切り替え制御し、
これと並行して前記光送受信器から入力された光信号を前記ローカル光ループバック回路に出力するよう前記第2の光スイッチを切り替え制御し、
その後で前記光送受信器を稼働させて光信号を発信させ、前記ローカル光ループバック回路で帰還させられた光信号が前記光送受信器で受信された否かを判断制御する、
上記の各制御動作を前記モジュール検査部が実行することを特徴とする障害発生箇所特定方法。
前記分離・切り替えモジュールは、前記光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路と、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器に出力する第1の光スイッチと、前記光送受信器から入力された光信号を前記の光線路のうちの1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する第2の光スイッチとを予め備えるものであると共に、外部からの操作指令に応じて動作するモジュール検査部を併設した構成とし、
前記モジュール検査部が備えるプロセッサに、
前記ローカル光ループバック回路で帰還させられた光信号を前記光送受信器に出力するよう前記第1の光スイッチを切り替える手順、
これと並行して前記光送受信器から入力された光信号を前記ローカル光ループバック回路に出力するよう前記第2の光スイッチを切り替える手順、
およびその後で前記光送受信器を稼働させて光信号を発信させ、前記ローカル光ループバック回路で帰還させられた光信号が前記光送受信器で受信された否かを判断する手順、
を設け、これらの各手順を実行させることを特徴とする障害発生箇所特定プログラム。
11a~h 光カプラ
12a~f、312g~h 光スイッチ
13 ローカル光ループバック回路
21、22、23 トランスポンダ
40 モジュール検査部
41 プロセッサ
42 入出力手段
43 検査手段
100、300 波長多重化装置
101、102、103 WDM方路
101a、102a、103a 分波器
101b、102b、103b 合波器
314 リモート光ループバック回路
Claims (7)
- 複数または単数系統の光線路、および複数または単数系統の光送受信器と接続され、当該光線路と光送受信器との間に装備されて光信号を入出力する波長多重化装置であって、
前記光線路から入力された光信号を前記光送受信器に出力する第1の光スイッチと、
前記光送受信器から入力された光信号を前記光線路に出力する第2の光スイッチとを備え、
前記光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路を設けた
ことを特徴とする波長多重化装置。 - 前記第1の光スイッチが、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器に出力する機能を備え、
前記第2の光スイッチが、前記光送受信器から入力された光信号を前記光線路のうちの1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する機能を備える
ことを特徴とする、請求項1に記載の波長多重化装置。 - 前記各光線路ごとに当該光線路から入力された光信号を分岐して前記各第1の光スイッチに対して出力する第1の光カプラと、
前記各第2の光スイッチごとに当該第2の光スイッチから入力された光信号を合波して前記各光線路に対して出力する第2の光カプラと
を有することを特徴とする、請求項2に記載の波長多重化装置。 - 外部からの操作指令に応じて動作するモジュール検査部を備え、
このモジュール検査部が、
前記ローカル光ループバック回路で帰還させられた光信号を前記光送受信器に出力するよう前記第1の光スイッチを切り替え制御する機能と、
これと並行して前記光送受信器から入力された光信号を前記ローカル光ループバック回路に出力するよう前記第2の光スイッチを切り替え制御する機能と、
その後で前記光送受信器に光信号を発信させ、前記ローカル光ループバック回路で帰還させられた光信号が前記光送受信器で受信された否かを判断制御する機能とを有することを特徴とする、請求項2に記載の波長多重化装置。 - 前記光線路から入力された光信号を当該光線路側に帰還させて出力するリモート光ループバック回路を備えると共に、
前記第1の光スイッチが、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器もしくは前記リモート光ループバック回路に出力する機能を備え、
前記第2の光スイッチが、前記光送受信器もしくは前記リモート光ループバック回路から入力された光信号を前記光線路のうちのいずれか1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する機能を備える
ことを特徴とする、請求項2に記載の波長多重化装置。 - 複数系統の光線路および光送受信器と接続され、当該光線路と光送受信器との間で光信号を入出力する分離・切り替えモジュールを備える波長多重化装置にあって、
前記分離・切り替えモジュールは、前記光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路と、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器に出力する第1の光スイッチと、前記光送受信器から入力された光信号を前記の光線路のうちの1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する第2の光スイッチとを予め備えるものであると共に、外部からの操作指令に応じて動作するモジュール検査部を併設した構成とし、
前記ローカル光ループバック回路で帰還させられた光信号を前記光送受信器に出力するよう前記第1の光スイッチを切り替え制御し、
これと並行して前記光送受信器から入力された光信号を前記ローカル光ループバック回路に出力するよう前記第2の光スイッチを切り替え制御し、
その後で前記光送受信器を稼働させて光信号を発信させ、前記ローカル光ループバック回路で帰還させられた光信号が前記光送受信器で受信された否かを判断制御する、
上記の各制御動作を前記モジュール検査部が実行することを特徴とする障害発生箇所特定方法。 - 複数系統の光線路および光送受信器と接続され、当該光線路と光送受信器との間で光信号を入出力する分離・切り替えモジュールを備える波長多重化装置にあって、
前記分離・切り替えモジュールは、前記光送受信器から入力された光信号を当該光送受信器側に帰還させて出力するローカル光ループバック回路と、前記光線路から入力された光信号もしくは前記ローカル光ループバック回路で帰還させられた光信号を外部からの切り替え操作によって選択的に前記光送受信器に出力する第1の光スイッチと、前記光送受信器から入力された光信号を前記の光線路のうちの1系統、もしくは前記ローカル光ループバック回路に外部からの切り替え操作によって選択的に出力する第2の光スイッチとを予め備えるものであると共に、外部からの操作指令に応じて動作するモジュール検査部を併設した構成とし、
前記モジュール検査部が備えるプロセッサに、
前記ローカル光ループバック回路で帰還させられた光信号を前記光送受信器に出力するよう前記第1の光スイッチを切り替える手順、
これと並行して前記光送受信器から入力された光信号を前記ローカル光ループバック回路に出力するよう前記第2の光スイッチを切り替える手順、
およびその後で前記光送受信器を稼働させて光信号を発信させ、前記ローカル光ループバック回路で帰還させられた光信号が前記光送受信器で受信された否かを判断する手順、
を設け、これらの各手順を実行させることを特徴とする障害発生箇所特定プログラム。
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RU2015106912A RU2607724C2 (ru) | 2012-07-31 | 2013-07-11 | Волновой мультиплексор и способ и программа для идентификации неисправного участка |
US14/414,156 US9654850B2 (en) | 2012-07-31 | 2013-07-11 | Wavelength multiplexer, and method and program for identifying failed portion |
JP2014528058A JP5858162B2 (ja) | 2012-07-31 | 2013-07-11 | 波長多重化装置、障害発生箇所特定方法およびプログラム |
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EP2549773B1 (fr) * | 2011-07-21 | 2017-10-25 | Orange | Dispositif et procédé de fusion de composantes optiques associées à une longueur d'onde en une composante optique fusionnée |
US9654850B2 (en) * | 2012-07-31 | 2017-05-16 | Nec Corporation | Wavelength multiplexer, and method and program for identifying failed portion |
EP2991253A1 (en) * | 2014-08-25 | 2016-03-02 | Xieon Networks S.à r.l. | Reconfigurable add/drop multiplexing in optical networks |
CN111211833B (zh) * | 2020-01-15 | 2022-08-05 | 南京邮电大学 | 一种基于光开关的跳线连接资源快速巡查器和巡查方法 |
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JPWO2014021075A1 (ja) | 2016-07-21 |
JP5858162B2 (ja) | 2016-02-10 |
US9654850B2 (en) | 2017-05-16 |
RU2607724C2 (ru) | 2017-01-10 |
RU2015106912A (ru) | 2016-09-20 |
CN104521159B (zh) | 2017-12-15 |
IN2014DN11164A (ja) | 2015-10-02 |
CN104521159A (zh) | 2015-04-15 |
US20150215687A1 (en) | 2015-07-30 |
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