WO2014166233A1 - 对roadm光网络进行监测的方法、装置以及系统 - Google Patents
对roadm光网络进行监测的方法、装置以及系统 Download PDFInfo
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- WO2014166233A1 WO2014166233A1 PCT/CN2013/086000 CN2013086000W WO2014166233A1 WO 2014166233 A1 WO2014166233 A1 WO 2014166233A1 CN 2013086000 W CN2013086000 W CN 2013086000W WO 2014166233 A1 WO2014166233 A1 WO 2014166233A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0773—Network aspects, e.g. central monitoring of transmission parameters
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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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0272—Transmission of OAMP information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0066—Provisions for optical burst or packet networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0077—Labelling aspects, e.g. multiprotocol label switching [MPLS], G-MPLS, MPAS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Definitions
- the present invention relates to the field of communications, and in particular to a Reconfigurable Optical Add Drop Multiplexer (ROADM) optical network.
- ROADM Reconfigurable Optical Add Drop Multiplexer
- Methods, devices and systems for monitoring BACKGROUND
- a Reconfigurable Optical Add Drop Multiplexer (ROADM) can be configured by software to implement local uplink and downlink and direct communication of channel wavelengths, thereby enhancing the flexibility of optical network service transmission.
- the existing ROADM system has CDC functions, namely, wavelength independence, direction independence, and wavelength competition independence (Colorless, Directionless, Contentionless, abbreviated as CDC).
- Conventional wavelength division multiplexing systems use fixed grid technology, and the channel grid is typically 50 GHz or 100 GHz.
- the ultra-100G transmission technology has created the need for a gridless or flexible grid, that is, the width of the channel grid is variable to accommodate the transmission requirements of wavelength division multiplexing with different modulation patterns and different rates.
- the CDC functionality of ROADM evolves into CDCG or CDCF functionality.
- the flexible grid technology was initially standardized in February 2011 by the International Telecommunication Union Study Group 15 (ITU-T SG15) G.694.1 standard.
- the internal version of the standard draft document is V1.2, and the standard frequency band is standardized.
- the center frequency is 193.1 + nx 0.00625, where n is an integer and the normalized bandwidth is 12.5 GHz xm, where m is a positive integer.
- the ROADM system with flexible grid technology is generally referred to as the Flex ROADM system.
- adjacent channels carrying wavelengths of different rate services are fixed at intervals of 50 GHz or 100 GHz, and each wavelength is allocated with fixed optical spectrum bandwidth resources of 50 GHz or 100 GHz.
- one channel may contain one carrier or multiple subcarriers, and each subcarrier may be continuously allocated in a spectrum or may be dispersed in a discontinuous spectrum. As shown in FIG. 1, one of the spectrum bandwidths is 8xl2.5 GHz, including 4 consecutive subcarriers, and each subcarrier has a 25 GHz spectral width.
- the optical transmission network of the ultra-100G era not only introduces flexible grid technology, but also multi-carrier optical transmission technology and stronger coherent DSP processing capability, so that it has configurable/programming features and is programmable. It means that it can be changed as needed.
- the line side of the system can select different spectrum efficiency and compensation algorithms according to different link states, and the wavelength selection device in the ROADM node in the system according to different signal spectrum width and number of cascades Select different grid widths and filter shapes; the receiving end in the system selects the corresponding DSP algorithm according to different baud rate and modulation format.
- the configuration information is sent by the network management system to each node of the system.
- the line side sender of the system changes the modulation format, subcarrier multiplexing mode, and other sending side configurations according to the link status, the network management system also needs to change the chain. Configuration of each ROADM node and receiver in the road.
- the ROADM optical network uses the network management system to configure all nodes on the optical network.
- these configurations are programmable.
- the configuration may be changed as many times as needed.
- the configuration workload increases, and the configuration error probability is large.
- a wavelength-division signal is applied to each optical channel or optical wavelength in a wavelength division multiplexing system, which can realize a variety of special applications.
- the application of the topping signal has been studied in the industry.
- the topping signal is sometimes called a low-frequency dither signal, and the effect of the topping signal loaded in the wavelength signal on the transmission performance of the channel is almost negligible.
- the research on the topping signal mainly includes: 1) in the transmission network layer based on the optical network element, using the topping signal to realize the confirmation and power management of the wavelength channel required for fault management in the wavelength division multiplexing system; 2) For example, in a method and apparatus for performance monitoring of an optical transmission system, a method for monitoring the performance of an optical amplifier is proposed, that is, monitoring a peaking signal of a known modulation depth to estimate an optical amplifier signal and a noise component; In the signal tracking and performance monitoring of multi-wavelength optical networks, a scheme of on-line wavelength routing tracking is proposed in a wavelength division multiplexing network, that is, each wavelength is modulated with a unique topping signal, and frequency shift keying is performed.
- Embodiments of the present invention provide a method, a device, and a system for monitoring a ROADM optical network, so as to at least solve the technical problem that the ROADM optical network cannot be effectively monitored in the related art.
- a method for monitoring a ROADM optical network includes: acquiring a wavelength label frequency carried in an optical signal and/or attribute information of a channel for transmitting the optical signal; The frequency and/or the above attribute information is used to monitor the ROADM optical network.
- the attribute information includes at least one of the following: a width of the channel, a location of the channel, whether the channel has a subcarrier, a distribution of subcarriers, a source address, a destination address, a modulation format, a subcarrier multiplexing manner, and a signal rate.
- the method before acquiring the wavelength label frequency and/or the attribute information, the method further includes: transmitting the attribute information on the wavelength label channel.
- monitoring the ROADM optical network according to the wavelength label frequency and/or the attribute information includes at least one of: determining whether the path of the ROADM optical network is generated according to the wavelength label frequency and/or the attribute information. Optical signal misconnection; detecting, according to the wavelength label frequency and/or the attribute information, whether the coherent receiver and the optical channel of the optical signal are in line at the place where the optical signal is dropped; according to the wavelength label frequency and/or the above
- the attribute information is used to generate the optical network configuration requirements, and is compared with the configuration information sent by the NMS to determine whether the network management information received by the node is abnormal.
- detecting, according to the wavelength label frequency and the attribute information, whether the optical channel of the coherent receiver and the optical signal of the optical signal is matched at the place where the optical signal is dropped includes: detecting, analyzing, and analyzing a wavelength label frequency of the optical signal And outputting at least one of a wavelength, a subcarrier distribution, a modulation format, a subcarrier multiplexing mode, and a signal rate carried in the wavelength label frequency; and the attribute information and the analyzed distribution of the wavelength and/or subcarrier, Comparing with the spectrum emitted by the local laser of the monitoring end to determine whether the local oscillator frequency of the coherent receiver at the monitoring end matches the spectrum of the downlink, and if not, it is determined that a sub-process occurs during the transmission of the optical signal.
- At least one of the number rates is compared to determine whether the settings of the sender and the receiver are matched. If they do not match, it is determined that the network management information has generated an error during the delivery process or the configuration information sent by the network management system is incorrect.
- determining whether the optical signal is staggered on the path of the ROADM optical network according to the wavelength label frequency and/or the attribute information includes: detecting a wavelength label frequency of the optical signal, and analyzing the wavelength label frequency The distribution of wavelengths and/or subcarriers carried in the uplink; and the distribution of the analyzed wavelengths and/or subcarriers are compared with the attribute information to determine whether the optical signal is misconnected.
- determining whether the path pipe configuration information transmission in the ROADM optical network is incorrect according to the wavelength label frequency and/or the attribute information includes: detecting a wavelength label frequency of the optical signal, and analyzing the wavelength label frequency Carrying at least one of a wavelength, a distribution of subcarriers, a modulation format of an optical channel, a subcarrier multiplexing mode, and a signal rate; and generating the configured attribute information to generate a configuration requirement of the node, Compare the configuration requirements with the configuration information transmitted by the network management system to determine whether the network management configuration information is transmitted incorrectly; and/or use the attribute information to determine whether the DSP algorithm received by the downlink is correct.
- comparing the analyzed optical wavelength and/or the distribution of the photo subcarriers with the attribute information to determine whether the optical signal misconnection comprises at least one of the following: the attribute information indicates that the first channel has N
- the first subchannel is determined to be a partial subcarrier, wherein the N is a positive integer.
- the node for transmitting the optical signal determines, by using the wavelength label and/or the attribute information, whether the site where the optical signal is dropped is the same as the destination site indicated by the attribute information, and if different, determining whether the fiber is connected or An error occurs in scheduling the spectrum; in the node for transmitting the optical signal, the node is generated according to at least one of the wavelength of the attribute information, the distribution of subcarriers, the modulation format of the optical channel, the subcarrier multiplexing mode, and the signal rate. Whether the configuration of the configuration is consistent with the configuration information delivered by the NMS. Network configuration information transfer from the error.
- monitoring the ROADM optical network according to the wavelength label frequency includes: determining that the spectrum of the same frequency is scheduled to be in the same optical fiber in the case that the wavelength label frequency conflicts.
- the method before the obtaining the wavelength label frequency carried in the optical signal, the method further includes: loading, by the one or more subcarriers in the same channel, the wavelength label frequency, wherein each sub-carrier in the same channel The carriers load the same wavelength label frequency, or different subcarriers located in the same channel respectively load different wavelength label frequencies.
- the method further includes: combining the plurality of subcarriers after the plurality of subcarriers in the same channel are loaded with the wavelength label frequency, wherein different subcarriers located in the same channel are respectively loaded Different wavelength label frequencies; or combining the plurality of subcarriers before the plurality of subcarriers in the same channel are loaded with the wavelength label frequency.
- the ROADM optical network is a flexible ROADM optical network.
- a method for monitoring a ROADM optical network includes: loading a wavelength label frequency and attribute information of a channel for transmitting the optical signal in an optical signal; transmitting the wavelength label frequency and / or the above attribute information, wherein the wavelength label frequency and/or the attribute information are used to monitor the ROADM optical network.
- the attribute information includes at least one of the following: a width of the channel, a location of the channel, whether the channel has a subcarrier, a distribution of subcarriers, a source address, a destination address, a modulation format, a subcarrier multiplexing manner, and a signal rate.
- transmitting the wavelength label frequency and/or the attribute information includes: transmitting the wavelength label frequency and/or the attribute information by using the wavelength label channel.
- an apparatus for monitoring a ROADM optical network includes: an acquiring unit configured to acquire a wavelength label frequency carried in an optical signal and/or an attribute of a channel for transmitting the optical signal The monitoring unit is configured to monitor the ROADM optical network according to the wavelength label frequency and/or the attribute information.
- the attribute information includes at least one of the following: a width of the channel, a location of the channel, whether the channel has a subcarrier, a distribution of subcarriers, a source address, a destination address, a modulation format, a subcarrier multiplexing manner, and a signal rate.
- the apparatus further includes: a transmitting unit configured to transmit the attribute information on the wavelength label channel before acquiring the wavelength label frequency in the optical signal and/or the attribute information of the channel transmitting the optical signal.
- the monitoring unit includes at least one of the following: a first monitoring module, configured to determine whether an optical signal is misconnected on a path of the ROADM optical network according to the wavelength label frequency and/or the attribute information; and/or Determining whether the received network management configuration information is incorrect; the second monitoring module is configured to detect, according to the wavelength label frequency and/or the attribute information, the coherent receiver and the optical channel of the optical signal downlink in the place where the optical signal is dropped Whether to match; and/or detecting whether the modulation format of the transmitting end matches the demodulation mode in the received network management configuration information; and the third monitoring module is configured to generate an optical network configuration according to the wavelength label frequency and/or the attribute information The configuration is compared with the configuration information sent by the NMS to determine whether the NMS information received by the node is abnormal.
- a first monitoring module configured to determine whether an optical signal is misconnected on a path of the ROADM optical network according to the wavelength label frequency and/or the attribute information; and/or Determining whether the received network management configuration information is
- an apparatus for monitoring a ROADM optical network includes: a loading unit configured to load a wavelength label frequency and attribute information of a channel for transmitting the optical signal in an optical signal; The unit is configured to send the foregoing wavelength label frequency and/or the attribute information, wherein the wavelength label frequency and/or the attribute information is used to monitor the ROADM optical network.
- the attribute information includes at least one of the following: a width of the channel, a location of the channel, whether the channel has a subcarrier, a distribution of subcarriers, a source address, a destination address, a modulation format, a subcarrier multiplexing manner, and a signal rate.
- the transmitting unit is configured to transmit the wavelength label frequency and/or the attribute information by using a wavelength label channel.
- a system for monitoring a ROADM optical network including: the foregoing device for monitoring a ROADM optical network and the foregoing device for monitoring a ROADM optical network.
- the wavelength label frequency information and the attribute information of the channel are used to realize the identification of the optical channel, thereby implementing monitoring of the ROADM optical network.
- Figure 1 is a schematic diagram of a spectrum of a 50 GHz fixed grid network and a flexible grid network
- Figure 2 is a preferred flow chart of a method for monitoring a ROADM optical network according to an embodiment of the present invention.
- FIG. 1 is a schematic diagram of a spectrum of a 50 GHz fixed grid network and a flexible grid network
- Figure 2 is a preferred flow chart of a method for monitoring a ROADM optical network according to an embodiment of the present invention
- FIG. 1 is a schematic diagram of a spectrum of a 50 GHz fixed grid network and a flexible grid network
- Figure 2 is a preferred flow chart of a method for monitoring a ROADM optical network according to an embodiment of the present invention
- FIG. 1 is a schematic diagram of a spectrum of a 50 GHz fixed grid network and a flexible grid network
- Figure 2 is a preferred flow chart of a method for monitoring a ROADM optical network according to an embodiment of the present invention
- FIG. 1 is a schematic diagram of a spectrum of
- FIG. 4 is a block diagram showing a preferred structure of an apparatus for monitoring a ROADM optical network according to an embodiment of the present invention. Another preferred block diagram of an apparatus for monitoring a ROADM optical network in accordance with an embodiment of the present invention;
- FIG. 6 is a preferred schematic diagram of a fiber optic connection diagnostic system of a Flex ROADM system in accordance with an embodiment of the present invention;
- FIG. 8 is a schematic diagram of a transmitting end according to an embodiment of the present invention;
- FIG. 9 is another schematic diagram of a transmitting end according to an embodiment of the present invention;
- FIG. 8 is a schematic diagram of a transmitting end of a node in a Flex ROADM system;
- FIG. 10 is a preferred schematic illustration of a monitoring end in accordance with an embodiment of the present invention
- Figure 11 is another preferred schematic view of a monitoring end in accordance with an embodiment of the present invention.
- the method includes the following steps: Step S202: Acquire a wavelength label frequency carried by the optical signal and/or Or attribute information of a channel for transmitting the optical signal; Step S204: monitoring the ROADM optical network according to the wavelength label frequency and/or the attribute information.
- the wavelength label frequency information and the attribute information of the channel are used to realize the identification of the optical channel, thereby implementing monitoring of the ROADM optical network.
- the technical problem that the ROADM optical network cannot be effectively monitored in the related art is solved by the above method, and the technical effect of effective monitoring of the ROADM optical network is achieved.
- the wavelength labeling technology is at the source end of the wavelength path. Before the wavelength signal enters the wavelength division network, the encoder is used for modulation and coding.
- Each wavelength signal is attached with a unique identifier of the whole network, that is, the wavelength label.
- the so-called wavelength label frequency is different.
- the meaning of the wavelength corresponds to different frequencies due to different frequencies.
- the wavelength label frequency of each wavelength passing through the reference point can be monitored and identified by the embedded wavelength label frequency detector.
- the wavelength label frequency is loaded in the current time window when a bit or baud is transmitted 1, and the wavelength label frequency is not loaded when 0 is transmitted.
- the source end when the source end is loaded, information such as frame check may be added through a certain coding mode, and at the receiving end, the wavelength transmitted by the source end may be detected according to the change of the amplitude of each wavelength label frequency in the time window.
- Label Information may include, but is not limited to, at least one of the following: a width of the channel, a location of the channel, whether the channel has a subcarrier, a distribution of subcarriers, a source address, a destination address, a modulation format, and a sub Carrier multiplexing mode, signal rate.
- the attribute information is communicated through the wavelength label channel.
- Profit The identification of the optical channel and photon carrier properties is realized by the wavelength tag frequency, and the transmission and reception of the optical channel in the optical network is realized by the transmission and reception of the wavelength channel information.
- the monitoring of the optical network in the above manner mainly has two aspects of monitoring: 1) monitoring on each scheduling path, and 2) performing matching monitoring of the coherent receiver when the optical signal is down.
- the monitoring of the foregoing two aspects may be: monitoring 1) determining, according to the wavelength label frequency and/or attribute information, whether an optical signal is misconnected on the path of the ROADM optical network; and/or determining whether the configuration information transmitted by the network management is Error; and/or monitoring 2) detecting, based on the wavelength label frequency and/or attribute information, whether the optical channel of the coherent receiver and the optical signal is matched in the vicinity of the optical signal; and/or detecting the modulation format and subcarrier of the transmitting end Whether at least one of the multiplexing mode and the signal rate matches the demodulation mode in the received network management configuration information.
- the attribute information may be compared with the configuration information transmitted by the network management system to determine whether the network management information received by the node is abnormal.
- monitoring 2 it can be implemented in the following preferred manner: detecting the wavelength label frequency of the optical signal, and analyzing at least the wavelength carried in the wavelength label frequency, the distribution of subcarriers, the subcarrier multiplexing mode, and the signal rate.
- the wavelength label frequency determines whether or not the distribution of subcarriers and wavelengths by the wavelength label frequency, and then comparing the obtained subcarrier and wavelength distribution information and the attribute information obtained from the wavelength label channel with the spectrum emitted by the local laser to determine whether or not
- the subcarrier multiplexing mode, the signal rate is compared with at least one of a demodulation mode, a subcarrier multiplexing mode, and a signal rate in the received network management configuration information.
- the configuration information transmitted by the network management system is Errors; use these attribute information to determine whether the DSP algorithm received by the next channel (such as the nyqusit strong filter damage recovery algorithm) matches, so as to effectively detect the transmission and reception modulation mode and effectively monitor the network management information.
- the above monitoring 1) it can be implemented in the following preferred manner: detecting the wavelength label frequency of the optical signal, analyzing the distribution of wavelengths and/or subcarriers carried in the wavelength label frequency; analyzing the wavelength and/or sub-wavelength The distribution of the carrier is compared with the attribute information to determine whether or not the optical signal is misconnected.
- the result of the analysis is directly compared with the attribute information to see that the phase does not match to determine whether an optical signal misconnection has occurred.
- the wavelength information, subcarrier of the above attribute information The configuration of the node, the modulation format of the optical channel, the subcarrier multiplexing mode, and the signal rate are the same as the configuration information sent by the NMS.
- the configuration information may include the grid width and the filter shape configuration. If it is different, it is determined that the configuration information transmitted by the network management is incorrect; and/or the attribute information is used to determine whether the DSP algorithm received by the downlink (such as the nyqusit strong filtering damage recovery algorithm) matches.
- the configuration requirement of the node and the network management according to at least one of the wavelength of the attribute information, the distribution of the subcarrier, the modulation format of the optical channel, the subcarrier multiplexing mode, and the signal rate Whether the configuration information sent is consistent.
- the configuration information may include the grid width, the filter shape configuration, and the like. If they are different, the configuration information transmitted by the network management system is determined to be incorrect. Preferably, it is also possible to determine whether a misconnection or a collision is generated only by the wavelength tag frequency. In the case where the wavelength tag frequency conflicts, it can be determined that the spectrum of the same frequency is scheduled to be in the same fiber.
- the method further includes: loading a wavelength label frequency on one or more subcarriers in the same channel in the optical signal.
- each subcarrier located in the same channel can load the same wavelength label frequency, and different subcarriers located in the same channel can also load different wavelength label frequencies respectively.
- the method further includes: performing multiplexing processing on the plurality of subcarriers, and the step of multiplexing processing may be performed before loading the wavelength label frequency or after loading the wavelength label frequency.
- the combining is performed after loading the wavelength label frequency
- different subcarriers located in the same channel can respectively load different wavelength label frequencies.
- the present embodiment further provides a preferred method for monitoring a ROADM optical network, which is described from the transmitting end.
- the method includes the following steps: Step S302: loading a wavelength label frequency and transmitting an optical signal in the optical signal. Attribute information of the channel; Step S304: Transmit wavelength label frequency and/or attribute information, where the wavelength label frequency and/or attribute information is used to monitor the ROADM optical network.
- Step S302 and step S304 are performed before step S202, and steps S302 and S304 are performed at the loading end, and steps S202 to S204 are performed at the receiving end or the monitoring end.
- the above attribute information includes but is not limited to at least one of the following: the width of the channel, the location of the channel, whether the channel has subcarriers, the distribution of subcarriers, the source address, the destination address, the modulation format, the subcarrier multiplexing mode, and the signal rate. .
- the attribute information described above can be transmitted through a wavelength label channel.
- the ROADM optical network may be a flexible ROADM optical network.
- a device for monitoring the ROADM optical network is provided. The device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
- the term "unit” or “module” may implement a combination of software and/or hardware of a predetermined function.
- the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and conceivable.
- 4 is a block diagram of a preferred structure of an apparatus for monitoring a ROADM optical network according to an embodiment of the present invention.
- the apparatus is located at a receiving end (or a monitoring end), as shown in FIG. 4, including: an obtaining unit 402 and Monitoring unit 404, the structure will be described below.
- the obtaining unit 402 is configured to acquire the wavelength label frequency in the optical signal and/or the attribute information of the channel for transmitting the optical signal.
- the monitoring unit 404 is coupled to the obtaining unit 402 and configured to light the ROADM according to the wavelength label frequency and/or the attribute information.
- the network monitors.
- the preferred embodiment further provides a device for monitoring the ROADM optical network of the reconfigurable add/drop multiplexer.
- the device is located at the loading end (or the transmitting end).
- the loading unit 502 is included. And is configured to load the wavelength label frequency and the attribute information of the channel for transmitting the optical signal in the optical signal;
- the sending unit 504 is coupled to the loading unit 502, and is configured to send the wavelength label frequency and/or attribute information, where the wavelength label frequency and/or Or attribute information is used to monitor the ROADM optical network.
- the transmitting unit 504 is further configured to transmit the wavelength label frequency and/or the attribute information through the wavelength label channel.
- the monitoring unit includes: a first monitoring module, configured to determine, according to the wavelength label frequency and/or attribute information, whether an optical signal is misconnected on the path of the ROOA optical network; and/or determine that the network management is transmitted Whether the configuration information is incorrect; and/or, the second monitoring module is configured to detect, according to the wavelength label frequency and/or the attribute information, whether the optical channel of the coherent receiver and the optical signal is matched in the place where the optical signal is dropped; and Or detecting whether at least one of a modulation format, a subcarrier multiplexing mode, and a signal rate of the transmitting end matches a demodulation mode in the received network management configuration information.
- the second monitoring module is further configured to process at least one of the following: detecting a wavelength label frequency of the optical signal, analyzing a distribution of wavelengths and/or subcarriers carried in the wavelength label frequency, and analyzing the attribute information and the analyzed The distribution of wavelengths and/or subcarriers is compared with the spectrum emitted by the local laser at the monitoring end to determine whether the local oscillator frequency of the coherent receiver at the monitoring end matches the spectrum of the downlink, and if not, the optical signal is determined.
- a subcarrier scheduling error or a laser transmission optical signal error occurs during the transmission; at least one of the modulation mode, the subcarrier multiplexing mode, and the signal rate in the attribute information and the demodulation in the received network management configuration information Whether the mode is compared, if there is no match, the configuration information transmitted by the network management is incorrect; use these attribute information to determine whether the DSP algorithm received by the downlink (such as the nyqusit strong filtering damage recovery algorithm) matches, so as to implement the transmission and reception modulation mode. Effective detection and effective monitoring of network management information.
- the first monitoring module is further configured to detect a wavelength label frequency of the optical signal, analyze a distribution of wavelengths and/or subcarriers carried in the wavelength label frequency, and analyze the analyzed wavelength and/or subcarrier distribution. Attribute information is compared to determine whether an optical signal is misconnected; and/or in the node for transmitting the optical signal, according to the wavelength of the attribute information, the distribution of subcarriers, the modulation format of the optical channel, the subcarrier multiplexing mode, At least one of the signal rates determines whether the configuration requirements of the local node are consistent with the configuration information sent by the network management system. If they are different, the configuration information transmitted by the network management system is determined to be incorrect.
- the third monitoring module is configured to generate an optical network configuration requirement according to the wavelength label frequency and/or the attribute information, and compare with the configuration information sent by the network management to determine whether the network management information received by the node is abnormal.
- the first monitoring module performs optical signal misconnection monitoring, there are mainly at least one of the following situations: 1) in the attribute information indicating that the first channel has N subcarriers in the optical signal, and the analyzed optical signal When the number of subcarriers located in the first channel is less than N, it is determined that the first channel loses part of the subcarriers, where N is a positive integer;
- the optical signal When the optical signal is off the road, it is determined by the wavelength label and/or the attribute information whether the station where the optical signal is dropped is the same as the destination station indicated by the attribute information, and if it is different, the fiber connection or the scheduling of the spectrum is determined. An error occurred; 3) In the node of the optical signal transmission, the configuration requirement of the local node is generated according to the wavelength of the attribute information, the distribution of the subcarrier, the modulation format of the optical channel, the subcarrier multiplexing mode, and the signal rate. The configuration information is consistent. The configuration information may include the grid width, the filter shape configuration, and the like. If they are different, the configuration information transmitted by the network management system is determined to be incorrect.
- the monitoring unit is further configured to determine that the spectrum of the same frequency is scheduled into the same fiber in the event of a collision of the wavelength label frequencies.
- the loading unit 502 is further configured to load a wavelength label frequency into one or more subcarriers in the same channel in the optical signal, where each subcarrier located in the same channel loads the same wavelength label frequency, Alternatively, different subcarriers located in the same channel respectively load different wavelength label frequencies.
- the apparatus further includes: a combining unit configured to combine the plurality of subcarriers, the combining unit may perform multiplexing before the loading unit loads the wavelength label frequency, or may load the wavelength in the loading unit. After the label frequency, the multiplex is performed.
- a preferred system for monitoring a ROADM optical network including the foregoing device for monitoring a ROADM optical network at a loading end (or a transmitting end), and the foregoing being located at the receiving end (or monitoring) A device that monitors the ROADM optical network.
- the monitoring method may be to add a wavelength label frequency to the channel, and determine whether the optical channel exists by detecting the presence of the wavelength label frequency on the line, and the transmission of the optical channel. path.
- the low-frequency wavelength tag frequency can be analyzed by spectrum in the optical signal multiplexing section, and then the corresponding wavelength is obtained.
- efficient detection of wavelength collisions can also be achieved using wavelength label frequencies.
- the optical signal of one channel is not spectrally divided into different interfaces, and one or more subcarriers are not present, and the subcarriers are not spectrally present. Decentralized issues that require overall monitoring.
- wavelength label frequencies For example: channel width
- related attribute information of the optical channels or subcarriers for example: channel width
- the location of the channel whether the channel has subcarriers, subcarrier distribution, source address, destination address, modulation format, subcarrier multiplexing mode, signal rate, etc.
- the optical path can be diagnosed by detecting whether the optical channel or the subcarrier is complete, whether optical signal misconnection occurs (so-called optical signal misconnection can include errors such as fiber connection and spectral scheduling, etc.), or according to wavelength or subcarrier and Modulation
- the configuration of the format is required to determine whether the configuration information delivered by the NMS matches (such as how the configuration information is required to be shaped for an optical channel), or whether the same error occurs and the local oscillator of the coherent receiver can be detected in the optical fiber.
- the Flex ROADM-based optical channel has the characteristics of variable spectral width, sub-carriers, and sub-carriers may be discontinuous, and the wavelength label is loaded on the optical channel or the photo-subcarrier by increasing the wavelength label frequency, and The attribute information of the optical channel or the optical subcarrier is transmitted through the wavelength label channel, so that the optical channel or the subcarrier can be monitored on the optical path, and whether the optical signal is misconnected, whether the configuration information sent by the network management is incorrect, and whether the occurrence occurs
- the coherent receiver's local oscillator spectrum does not match the optical path to be routed.
- a diagnostic apparatus and method for optical signal misconnection in a preferred Flex ROADM system is proposed.
- the apparatus and method are suitable for monitoring wavelengths or subcarriers in a high speed optical signal.
- each subcarrier can be loaded with the wavelength label frequency of the same frequency as a whole, or a wavelength label frequency of a different frequency can be added to each subcarrier, or a wavelength label frequency of a different frequency can be added to the combination in the subcarrier.
- the monitoring is performed on the scheduled paths of the optical layer ROADM to determine whether the scheduling of the subcarriers is correct, and whether the configuration information sent by the network management is incorrect.
- the frequency of the local oscillator of the coherent receiver and the downlink are detected. Whether the spectrum or the frequency of each subcarrier matches, whether the modulation format and/or the subcarrier multiplexing mode and/or the signal rate match the demodulation mode corresponding to the demodulation end, thereby achieving diagnosis of the optical signal misconnection of the Flex ROADM. purpose.
- the solution of the embodiment of the present invention will be specifically described below with reference to specific embodiments.
- the sending end includes: a wavelength label loading unit and an information sending unit
- the monitoring end includes: a wavelength label detecting unit, an information receiving unit, and an analyzing unit.
- the information sending unit the information sent by the information sending unit is mainly used to characterize the channel of the optical signal, for example: the width of the channel and the position of the channel, whether the channel has subcarriers Subcarrier distribution, source node address, destination node address, modulation format, subcarrier multiplexing mode, signal rate, etc., and these attribute information can be transmitted through the wavelength label channel implemented by the wavelength label loading unit.
- a certain channel that is, the above channel
- a wavelength label frequency when a wavelength label frequency is applied to the subcarrier, a wavelength label frequency may be added, and a different wavelength label frequency may be added to each subcarrier
- the wavelength label detecting unit is configured to determine a wavelength corresponding to the optical signal by analyzing a frequency of the wavelength label included in the optical signal
- the information receiving unit is configured to receive the optical channel attribute information transmitted in the wavelength label channel; the analyzing unit, setting For the result of the detection by the receiving wavelength label detecting unit and the information received by the information receiving unit, comparing the wavelength of the optical signal or the distribution of the subcarriers, it is calculated whether the scheduling of each subcarrier in the ROADM system is correct, and the spectrum scheduling in the line Whether it is correct, and whether the configuration information sent by the network management system is incorrect; or whether the spectrum of the optical signal transmitted by the local oscillator laser matches, and at least one of the modulation format, the subcarrier multiplexing mode, and the signal rate is demodulated
- each intermediate spectrum scheduling or downlink optical signal can be used to detect the wavelength label frequency of the optical spectrum and analyze the optical channel attribute information by using the optical wavelength or photon carrier corresponding to the wavelength label frequency.
- the attribute information of the optical channel is compared to determine whether the optical signal is misconnected and whether the configuration information sent by the NMS is incorrect.
- a Flex ROADM system including: a transmitting end and one or more monitoring ends
- the preferred embodiment further provides a method for processing the same, including: at the transmitting end: selecting according to a wavelength or a center frequency of the subcarriers The corresponding wavelength label frequency loads the wavelength label onto the wavelength or subcarrier; the attribute information of the wavelength or subcarrier (for example: the width of the channel, the position of the channel, whether the channel has subcarriers, the distribution of subcarriers, the source address, the destination) Address, modulation format, subcarrier multiplexing mode, signal rate, etc.
- misconnections mainly include: fiber connection error, spectrum scheduling error, etc.
- wavelength label conflict is found through the wavelength label frequency, it is possible to diagnose an error in the scheduling of the fiber connection and the spectrum, thereby causing a partial spectrum of the same frequency to be dispatched into the same fiber to cause a collision; 3) If the wavelength label frequency and the channel attribute information are used, it is found that this channel is from one site to another destination site, but when the route is found to be not the destination site of the route, it can be diagnosed as An error occurred during the scheduling of the fiber connection and the spectrum to cause a channel to be lost;
- the optical channel or subcarrier related attribute information is transmitted through the wavelength label channel by adding a corresponding wavelength label frequency to the optical channel or the subcarrier, and the optical channel or subcarrier is monitored on the line.
- the embodiment of the invention is mainly based on a flexible grid wavelength division multiplexing system using wavelength label technology, which uses the wavelength label frequency to realize the identification of the optical channel and the photo subcarrier property, and cooperates with the transmission and reception of the wavelength channel information to realize the optical signal error in the Flex ROADM system. Diagnose and monitor the error of network management information transmission.
- the wavelength label loading end loads the wavelength label signal in the optical signal, and transmits the related attribute information of the channel through the wavelength label channel; at the detecting end, the wavelength label detecting unit detects the wavelength label frequency, and judges The wavelength or subcarrier, and the information receiving unit receives the relevant attribute information of each optical channel in the optical signal, and combines the wavelength or the attribute information of the subcarrier and the optical channel to determine whether the fiber connection and the spectrum scheduling in the Flex ROADM are correct; This information is compared with the received network management configuration information to determine whether the network management information is correctly transmitted.
- Figure 1 is a schematic diagram of a comparison of a fixed grid and a flexible grid.
- the interval of adjacent channels carrying wavelengths of different rate services is fixed at 50 GHz, and each wavelength is allocated a fixed 50 GHz optical spectrum bandwidth resource.
- each wavelength is allocated a fixed 50 GHz optical spectrum bandwidth resource.
- the spectral width of a channel in a flexible grid network can be 12.5G, 25G, 50G, 75G, 100GHz, and the like.
- Figure 6 is a system diagram of the fiber connection diagnosis of the Flex ROADM system, which includes two parts: the transmitting end and the monitoring end.
- the transmitting end includes: a wavelength label loading unit and a channel information sending unit, where the former loads the wavelength label frequency of the optical channel or the subcarrier corresponding frequency on the optical channel or the photo subcarrier; the latter attributes related to the optical channel or the subcarrier Transmitted through a certain channel, preferably, the channel may be a wavelength label channel formed by a wavelength label.
- the method includes: a wavelength label detecting unit, a channel information receiving unit, and an analyzing unit.
- the wavelength label detecting unit detects the wavelength label frequency carried on the optical signal, analyzes the frequency component carried therein, and determines the optical channel or subcarrier component existing on the optical signal; the channel information receiving unit receives the optical channel attribute information through the wavelength label channel.
- FIG. 7 is a connection diagram of a node's uplink and downlink and optical signal scheduling in a Flex ROADM system.
- the multiplex section fiber includes a beam splitter, wherein the beam splitter splits the optical signal of the multiplex section into a part of the light for detecting the wavelength label.
- FIG. 8 is an embodiment of a transmitting end, where an uplink optical channel includes four subcarriers, and after four subcarriers are first combined by a combiner, a wavelength label loading unit is used to simultaneously add an upper wavelength label to four subcarriers.
- the frequency, the wavelength label loading unit loads the optical channel attribute information sent by the channel information sending unit onto the wavelength label channel.
- the wavelength tag signal contains wavelength tag frequency and optical channel attribute information.
- the frequency of the wavelength label may be the wavelength label frequency corresponding to the optical channel. In this case, it may be only one frequency. It may also be the wavelength label frequency corresponding to each subcarrier. In this case, only one frequency or multiple frequencies may be used.
- FIG. 9 is another embodiment of the transmitting end, where the uplink optical channel includes 4 subcarriers, and the wavelength label loading unit first adds the upper wavelength label frequency to the 4 subcarriers, and the wavelength label loading unit sends the channel information sending unit. The transmitted optical channel attribute information is loaded onto each wavelength label channel, and then the four subcarriers are combined by the combiner.
- Each wavelength label signal includes at least one wavelength label frequency, and the attribute information of the optical channel and the subcarrier is transmitted through a wavelength label channel formed by the wavelength label.
- FIG. 10 is an embodiment of a monitoring end, wherein the optical signal to be detected has n ways, and each of the optical signals may include multiple optical channels.
- the wavelength label detecting unit detects the wavelength label of the n optical signals, and detects the wavelength label frequency carried in each of the paths; and the information receiving unit receives the optical channel attribute information transmitted by the wavelength label forming the wavelength label channel.
- the analyzing unit receives the result detected by the wavelength label detecting unit and the information received by the information receiving unit, compares the distribution of wavelengths or subcarriers in the n optical signals, and calculates whether the scheduling of each subcarrier in the ROADM system is correct and the spectrum in the line Whether the scheduling is correct and the network management configuration information is correct.
- 11 is another embodiment of the monitoring end, wherein the wavelength label detecting unit performs detection of the wavelength label frequency on the optical signal of the downlink, and determines the wavelength of the light or the distribution of the photon carrier carried therein.
- the information receiving unit receives the optical channel attribute information transmitted by the wavelength label forming the wavelength label channel.
- the analyzing unit receives the result detected by the wavelength label detecting unit and the information received by the information receiving unit, and compares with the spectrum emitted by the local laser to determine whether the frequency of the local oscillator of the coherent receiver matches the spectrum of the downlink, thereby monitoring Whether subcarrier scheduling error occurs or the local oscillator laser sends an optical signal error; and whether the modulation mode of the transmitting end matches the local demodulation mode, and/or uses these attribute information to determine the DSP algorithm for downlink reception (such as nyqusit mode strong filter impairment) Whether the recovery algorithm) matches, so as to monitor whether the network management configuration information is correct.
- the above-mentioned coherent receiver may be a receiving unit of a high speed service.
- the diagnosis of the optical signal misconnection in the ROADM system and the monitoring of the network management information transmission error can be realized, that is, the monitoring of the correctness of the scheduling of each optical channel or subcarrier, and the downlink light can be realized.
- software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.
- a storage medium is provided, the software being stored, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
- the wavelength tag frequency information and the channel attribute information are used to realize the identification of the optical channel, thereby implementing monitoring of the ROADM optical network.
- the technical problem that the ROADM optical network cannot be effectively monitored in the related art is solved by the above method, and the technical effect of effective monitoring of the ROADM optical network is achieved.
- the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
- the computing device may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
- the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
- the invention is not limited to any specific combination of hardware and software.
- the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
- the method, device, and system for monitoring the optical network of the reconfigurable add/drop multiplexer provided by the embodiment of the present invention have the following beneficial effects: solving the problem that the ROADM optical network cannot be effectively monitored in the related art.
- Technical problems have achieved the technical effect of effective monitoring of ROADM optical networks.
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US14/784,086 US9831945B2 (en) | 2013-04-11 | 2013-10-25 | Methods, apparatuses and system for monitoring ROADM optical network |
JP2016506754A JP6200066B2 (ja) | 2013-04-11 | 2013-10-25 | Roadm光ネットワークにモニタリングを行う方法、装置及びシステム |
EP13881898.4A EP2985928A4 (en) | 2013-04-11 | 2013-10-25 | ROADM OPTICAL NETWORK SURVEILLANCE METHOD, APPARATUS AND SYSTEM |
KR1020157030141A KR101831042B1 (ko) | 2013-04-11 | 2013-10-25 | Roadm 광네트워크에 모니터링을 수행하는 방법, 장치 및 시스템 |
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CN112100475B (zh) * | 2020-08-14 | 2023-10-03 | 武汉光迅科技股份有限公司 | 一种roadm设备维护方法、装置及计算机存储介质 |
CN115529102A (zh) * | 2021-06-25 | 2022-12-27 | 中兴通讯股份有限公司 | 一种多维站点内连纤关系确定方法及装置 |
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