WO2015087446A1 - 受信装置、送信装置、光伝送装置、光伝送システム及び監視方法 - Google Patents
受信装置、送信装置、光伝送装置、光伝送システム及び監視方法 Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims description 15
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- 230000006854 communication Effects 0.000 claims abstract description 82
- 238000004891 communication Methods 0.000 claims abstract description 82
- 238000000605 extraction Methods 0.000 claims abstract description 45
- 239000000284 extract Substances 0.000 claims abstract description 16
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 230000004931 aggregating effect Effects 0.000 claims 1
- 230000007175 bidirectional communication Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 description 12
- 238000012546 transfer Methods 0.000 description 4
- 241001522296 Erithacus rubecula Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 101100406674 Arabidopsis thaliana OTU4 gene Proteins 0.000 description 1
- 102100035309 GRIP and coiled-coil domain-containing protein 1 Human genes 0.000 description 1
- 102100028617 GRIP and coiled-coil domain-containing protein 2 Human genes 0.000 description 1
- 101001024398 Homo sapiens GRIP and coiled-coil domain-containing protein 1 Proteins 0.000 description 1
- 101001058870 Homo sapiens GRIP and coiled-coil domain-containing protein 2 Proteins 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
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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
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/14—Monitoring arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/07—Monitoring an optical transmission system using a supervisory signal
- H04B2210/072—Monitoring an optical transmission system using a supervisory signal using an overhead signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0057—Operations, administration and maintenance [OAM]
- H04J2203/006—Fault tolerance and recovery
Definitions
- the present invention relates to a receiving device, a transmitting device, an optical transmission device, an optical transmission system, and a monitoring method.
- data is often divided into a plurality of lanes, and subcarriers or polarized waves that carry the divided data are often multiplexed.
- the operation speed of the signal processing device that processes the divided data can be suppressed (for example, see Non-Patent Document 1).
- optical transponder that communicates at a speed of 100 Gbit / s and distributes data according to an OTU (Optical channel transport unit) format defined in Non-Patent Document 1 to a plurality of lanes for transmission.
- OTU Optical channel transport unit
- the optical transponder receives signals via a plurality of channels (lanes), and restores the original signal by executing synchronization and deskew between the channels.
- the function of transferring multi-lane data is implemented in the optical transponder, and the optical transponder can realize high-speed data transfer.
- the data conforming to the OTU format includes, in addition to the payload, monitoring control data for monitoring the state of the transmission path and controlling communication based on the monitoring result.
- this monitoring control data is also distributed.
- the monitoring control data transmitted through the plurality of lanes becomes incomplete, and the state of the transmission path Monitoring becomes difficult.
- the present invention has been made in view of the above circumstances, and an object thereof is to improve fault tolerance of optical communication via a plurality of lanes.
- a receiving apparatus of the present invention includes a receiving unit that receives a lane signal transmitted through each of a plurality of lanes from a transmitting apparatus that distributes an OTU frame to the plurality of lane signals, and a plurality of lanes.
- a receiving unit receives a lane signal transmitted through each of a plurality of lanes from a transmitting apparatus that distributes an OTU frame to the plurality of lane signals, and a plurality of lanes.
- an extraction unit that extracts data included in the overhead of the OTU frame, information on the data extracted by the extraction unit, and the lane signal from which the data is extracted by the extraction unit are transmitted.
- An output unit that outputs information indicating a communication state of the lane.
- the receiving device outputs information indicating the communication state of each of the plurality of lanes. Therefore, even if a communication failure occurs in any of the plurality of lanes, the communication state of each lane can be monitored. As a result, the fault tolerance of optical communication through a plurality of lanes can be improved.
- FIG. 1 shows a configuration of an optical transmission system 100 according to the present embodiment.
- the optical transmission system 100 includes an optical transmission device 10 and a counter device 50 that are connected to each other via an optical communication line.
- the optical communication line is, for example, an optical fiber constituting a core network.
- the optical communication line according to the present embodiment includes lanes L1 and L2 corresponding to each of the multiplexed subcarriers. Each of the lanes L1 and L2 transmits a lane signal (optical signal).
- the lane signal is, for example, an OTL4.2 (Optical channel Transport Lane 4.2) signal.
- the optical transmission device 10 includes a receiving device 20 that receives a lane signal from the opposing device 50 and a transmitting device 30 that transmits the lane signal to the opposing device 50.
- the optical transmission device 10 includes the reception device 20 and the transmission device 30, and thus communicates with the opposite device 50 in both directions.
- the receiving device 20 generates a client signal from the lane signal received from the opposite device 50 and transmits it to the client.
- the client signal is, for example, a 100 GbE digital signal.
- the client is, for example, an OLT (Optical Line Terminal) operated by a radio base station or a communication carrier.
- the receiving device 20 generates a client signal from a receiving unit 21 that receives a lane signal, a termination processing device 22 that performs termination processing of an OTU frame carried by a plurality of lane signals, and an OTU signal that carries an OTU frame. It has an OTN-LSI 23.
- the receiving unit 21 receives a lane signal transmitted via each of the plurality of lanes L1 and L2.
- the receiving unit 21 has DSP-LSI (Digital Signal Processing-Large Scale Integration) 21a, 21b that executes digital signal processing on the lane signals of the lanes L1, L2.
- the receiving unit 21 transfers the received lane signal to the termination processing device 22.
- the termination processing device 22 restores one OTU signal from the two lane signals distributed from the one OTU signal by the opposing device 50. That is, the termination processing device 22 restores the OTU frame from the two lane signals carried by the subcarrier.
- the termination processing unit 22 determines the communication status of the SFI-RX (SerDes Framer Interface Receiver) 221a and 221b for receiving the lane signal according to the optical communication format, the extraction unit 222 that extracts data from the lane signal, and the lanes L1 and L2.
- An output unit 223 that outputs information to be displayed, a deskew unit 224 that performs deskew, and an SFI-TX (Transmitter) 225 for transmitting an OTU signal in accordance with an optical communication format.
- the extraction unit 222 receives the lane signal received by the reception unit 21 for each of the plurality of lanes L1 and L2 via the SFI-RXs 221a and 221b. Further, the extraction unit 222 extracts data included in the GCC (General Communication Channel) area of the overhead of the OTU frame from each received lane signal.
- GCC General Communication Channel
- FIG. 2 shows the structure of the OTU frame.
- the OTU frame includes an overhead added to the payload, a payload that is an area in which user data is stored, and an FEC (Forward Error) for correcting a bit error that occurs when the data is transmitted. Correction) Consists of a parity area.
- FEC Forward Error
- the overhead includes a GCC area and a RES (Reserve) area that can be freely used by the user.
- the GCC region is a region indicated by “GCC0”, “GCC1”, and “GCC2” in FIG.
- the RES areas are five areas indicated as “RES” in FIG.
- the GCC area and the RES area are usually used for transferring OAM (Operation Administration and Maintenance) information and the like in the management plane.
- OAM Operaation Administration and Maintenance
- data in the GCC area is extracted, but data in the RES area may be extracted instead.
- the extraction unit 222 includes frame synchronization units 222a and 222b for synchronizing OTU frames, and GCC extraction units 222c and 222d for extracting data in the GCC region from the lane signal.
- Each of the frame synchronization units 222a and 222b synchronizes the lane signal transmitted via each of the lanes L1 and L2, using a frame synchronization pattern (FAS: Frame Alignment Signal) included in the lane signal. More specifically, each of the frame synchronization units 222a and 222b identifies the overhead of the OTU frame based on a multiframe number (MFAS: MultiFrameMultiAlignment Signal). Each of the frame synchronization units 222a and 222b synchronizes the OTU frame by individually synchronizing the lane signals. Each of the frame synchronization units 222a and 222b sequentially transmits the identified overhead multi-frame number to the output unit 223, and transmits the synchronized lane signal to each of the GCC extraction units 222c and 222d.
- FAS Frame Alignment Signal
- the GCC extraction units 222c and 222d are implemented as LSI functions, for example.
- the GCC extraction unit 222c sequentially extracts data in the GCC region from the lane signal transmitted via the lane L1, and sends the data to the output unit 223.
- the GCC extraction unit 222d sequentially extracts data in the GCC area from the lane signal transmitted via the lane L2, and sends the data to the output unit 223.
- the GCC extraction units 222 c and 222 d transfer the lane signal to the deskew unit 224.
- the output unit 223 is implemented as an LSI function, for example.
- the output unit 223 acquires the multiframe number transmitted from each of the frame synchronization units 222a and 222b and the data transmitted from each of the GCC extraction units 222c and 222d, and aggregates them for each lane. For example, the output unit 223 aggregates a plurality of pieces of data sequentially transmitted from the GCC extraction unit 222c into one representative data extracted most frequently by the GCC extraction unit 222c. Then, the output unit 223 outputs the one data to the writing unit 32 of the transmission device 30 as information indicating that the communication state of the lane L1 is normal.
- the output unit 223 is configured when the multiframe number transmitted from the frame synchronization unit 222a is missing at a certain rate or when the frequency of data transmission from the GCC extraction unit 222c is equal to or less than a certain value.
- Information indicating that the communication state of the lane L1 is abnormal may be output to the writing unit 32.
- the output unit 223 outputs information indicating the communication state of the lane L2 to the writing unit 32 for the data transmitted from the frame synchronization unit 222b and the GCC extraction unit 222d.
- the normal communication state of each of the lanes L1 and L2 means a state where a communication speed of a certain level or more is maintained and the bit error rate is a certain value or less.
- the abnormal communication state of each of the lanes L1 and L2 includes a state in which the communication speed is extremely reduced and a state in which the bit error rate is extremely high in addition to a state in which communication is interrupted. Further, for example, when only the semiconductor laser for generating the optical signal of the lane L2 is deteriorated, or when the error of the wavelength of the optical signal is increased because only the temperature of the semiconductor laser is not properly managed, etc. Only the lane L2 is considered to be in an abnormal communication state.
- the deskew unit 224 restores one OTU signal from the two lane signals and transfers it to the OTN-LSI 23 via the SFI-TX 225.
- the OTN-LSI 23 has a GCC extraction unit 23a. Similar to the GCC extraction units 222c and 222d, the GCC extraction unit 23a extracts data included in the overhead GCC region of the OTU frame. However, the GCC extraction unit 23a extracts data not from the lane signal but from the restored OTU signal.
- the transmission device 30 generates two lane signals from the client signal and transmits them to the opposite device 50 via the lanes L1 and L2.
- the transmission device 30 includes a generation unit 31 that generates an OTU frame from a client signal, a writing unit 32 that writes data to the overhead of the OTU frame, a distribution unit 33 that distributes the OTU frame to two lane signals, and a lane signal
- a transmission unit 34 for transmitting to the device 50 is included.
- the writing unit 32 writes the data for determining the communication state of the lanes L1 and L2 in the GCC area of the overhead of the OTU frame generated by the generating unit 31 based on the information output from the output unit 223. Note that the writing unit 32 according to the present embodiment, as a rule, writes data in which all bit values are fixed to zero.
- the distribution unit 33 distributes the OTU frame in which the data is written by the writing unit 32 to a plurality of lane signals.
- the distribution unit 33 is, for example, an ITU-T recommendation G.264.
- the 16-byte blocks constituting the OTU frame are distributed in round robin.
- the distribution unit 33 alternately allocates the 16-byte block constituting the OTU frame to the lane L1 and the lane L2.
- One of the lanes L1 and L2 is assigned an odd multiframe number, and the other is assigned an even multiframe number.
- the transmission unit 34 transmits each lane signal distributed by the distribution unit 33 to the opposite device 50 via each of the lanes L1 and L2.
- the facing device 50 is a communication device configured similarly to the optical transmission device 10. That is, the opposing device 50 includes a receiver configured similarly to the receiving device 20 and a transmitter configured similar to the transmitting device 30.
- the receiver of the opposite device 50 receives the lane signal transmitted from the transmission device 30 via the lanes L1 and L2. In addition, the receiver of the opposite device 50 extracts the data written by the writing unit 32 from the lane signal. In the present embodiment, since the fixed data is written by the writing unit 32, the receiver of the opposite device 50 extracts the same data for both the lanes L1 and L2. However, the writing unit 32 may write the data so that the data corresponding to each of the lanes L1 and L2 is extracted by the receiver of the opposing device 50.
- the transmitter of the opposite device 50 transmits a lane signal to the receiving device 20 via the lanes L1 and L2. Further, the data written in the overhead of the OTU frame by the transmitter of the opposite apparatus 50 is extracted by the extraction unit 222.
- FIG. 3 shows an OTU signal 60 and lane signals 71 and 72 as a schematic example when a communication failure occurs in the lane L2.
- the OTU signal 60 carries OTU frames 61, 62, 63, 64, and the like.
- Each of the OTU frames 61, 62, 63, 64 includes GCC areas 61g, 62g, 63g, 64g.
- the OTU signal 60 is, for example, an OTU4 signal of about 100 Gbit / s.
- the OTU frame 61 is divided into data 61a and 61b
- the OTU frame 62 is divided into data 62a and 62b
- the OTU frame 63 is divided into data 63a and 63b
- the OTU frame 64 is divided into data 64a and 64b.
- the lane signal 71 including the data 61a, 62a, 63a, and 64a is transmitted through the lane L1, and the data 61b and 62b. , 63b, 64b, etc. are transmitted via the lane L2.
- each of the lane signals 71 and 72 is transmitted in a state where the symbol rate is suppressed as compared with the OTU signal 60.
- the lane signal 72 is lost.
- the receiving device 20 receives only the lane signal 71.
- the receiving apparatus 20 tries to combine the lane signals 71 and 72 into one OTU signal 60, the data 61a, 62a, 63a, and 64a are restored normally, but the data 61b, 62b, 63b, and 64b are normal. Is not restored (abnormal).
- the receiving apparatus 20 cannot synchronize the OTU frames 61 to 64 due to the lack of the lane signal 72 even if it tries to reproduce the OTU signal 60. Therefore, the receiving apparatus 20 cannot restore the OTU frames 61 to 64. In other words, the OTU signal 60 is interrupted due to the lack of the lane signal 72 even though no failure has occurred in the lane L1.
- FIG. 4 shows the multiframe number included in the lane signal and the multiframe number acquired by the output unit 223 when the communication state of both the lanes L1 and L2 is normal and when a communication failure occurs in the lane L2.
- the multiframe number group 81 shows a case where the communication states of both lanes L1 and L2 are normal
- the multiframe number group 82 shows a case where a communication failure has occurred in the lane L2.
- the multiframe number is indicated by a number following “MF”. That is, “MF0” indicates that the multiframe number is zero, and “MF1” indicates that the multiframe number is 1.
- the even multiframe number is included in the lane signal transmitted via the lane L1.
- the odd multiframe number is included in the lane signal transmitted through the lane L2.
- the GCC extraction unit 23a of the OTN-LSI 23 can extract data from the restored OTU frame.
- the output unit 223 outputs information indicating that the communication states of the lanes L1 and L2 are both normal.
- the output unit 223 can obtain an even multiframe number included in the lane signal transmitted via the lane L1. Therefore, the output unit 223 outputs information indicating that the communication state of the lane L1 is normal and outputs information indicating that the communication state of the lane L2 is abnormal.
- the writing unit 32 transmits the lane transmitted via the lane L2 among the data written to the overhead of the OTU frame. Stop writing data included in the signal. Specifically, the writing unit 32 writes data that is written into the overhead of the OTU frame when an even-numbered (odd number) -th block among the 16-byte blocks constituting the OTU frame is transmitted via the lane L2. Among these, data writing to the even (odd) numbered block is stopped. Thereby, useless data can be prevented from being transmitted.
- the writing unit 32 writes data indicating the lane L2 in which the communication state is abnormal. Accordingly, the writing unit 32 notifies the opposite device 50 via the lane L1 that the communication state of the lane L2 has become abnormal.
- the output unit 223 determines that the communication state of the lane L2 notified from the opposing device 50 has become abnormal. Then, the output unit 223 causes the writing unit 32 to stop writing data included in the lane signal transmitted via the lane L2 by outputting specific information. Thereby, useless data can be prevented from being transmitted.
- the output unit 223 outputs information indicating the communication states of the lanes L1 and L2. Thereby, even if a communication failure occurs in either lane L1, L2, it becomes possible to monitor the communication state of each of lanes L1, L2. As a result, the fault tolerance of the optical communication via the lanes L1 and L2 can be improved.
- the writing unit 32 writes specific data in the overhead of the OTU frame based on the information output from the output unit 223. Even if a communication failure occurs in the other of the lanes L1 and L2, the writing unit 32 uses the data included in the lane signal transmitted through one of the lanes L1 and L2. Can communicate with the opposing device 50 using the control monitoring data. This realizes a robust in-band control and monitoring channel that enables communication if at least one lane is conductive.
- a signal is distributed over multiple lanes, or a Line constituting a communication device. / Client cards may be divided and arranged. For this reason, the GCC area included in the overhead of the OTU frame is also divided and transmitted. If the optical transmission system 100 according to the present embodiment is applied to such a general optical communication network, fault tolerance is improved, which is preferable.
- FIG. 5 schematically shows an optical communication network 90 via a submarine cable.
- the transponder 92 stores the number of FEC errors included in the data received from the transponder 91 in the GCC area (RES area), and transmits the data including the GCC area to the transponder 91. That is, the GCC area is used by the transponder 91 to confirm transmission quality (opposite performance) at a remote location of the transmission channel of the own station.
- optimization is performed based on the Q value obtained from the number of FEC errors.
- the transponder 91 can improve the quality of the transmission channel of its own station even when communication of the main signal is lost in units of subcarriers. Can be confirmed.
- FIG. 6 schematically shows a general media converter system 95.
- a carrier device is directly arranged in the end user station 96 as a media converter 97.
- control and monitoring of the media converter 97 are often performed depending on the in-band channel.
- optical transmission system 100 is applied to the media converter system 95, the control and monitoring of the media converter 97 can be continued as much as possible even when the main signal data is interrupted. .
- the number of lanes is not limited to two and may be three or more.
- the lanes L1 and L2 according to the above-described embodiment correspond to subcarriers, they may correspond to polarization or multilevel Ich and Qch.
- the receiving device, transmitting device, optical transmission device, optical transmission system and monitoring method of the present invention are suitable for optical communication with high fault tolerance.
- optical transmission device 100 optical transmission system, 10 optical transmission device, 20 receiving device, 21 receiving unit, 21a, 21b DSP-LSI, 22 termination processing device, 221a, 221b SFI-RX, 222 extraction unit, 222a, 222b frame synchronization unit, 222c, 222d GCC extraction unit, 223 output unit, 224 deskew unit, 225 SFI-TX, 23 OTN-LSI, 23a GCC extraction unit, 30 transmission device, 31 generation unit, 32 writing unit, 33 distribution unit, 34 transmission unit, 50 Opposite device, 60 OTU signal, 61, 62, 63, 64 OTU frame, 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b data, 61g, 62g, 63g, 64g GCC Frequency, 71 and 72 lane signals, 81, 82 multiframe number group, 90 an optical communication network, 91 and 92 transponders, 95 media converter system 96 end user station building
Abstract
Description
Claims (11)
- OTUフレームを複数のレーン信号に分配する送信装置から複数のレーン各々を介して伝送されるレーン信号を受信する受信部と、
前記複数のレーン各々について前記受信部によって受信されたレーン信号から、OTUフレームのオーバヘッドに含まれるデータを抽出する抽出部と、
前記抽出部によって抽出されたデータに関する情報を、前記抽出部によってデータが抽出されたレーン信号を伝送するレーンの通信状態を示す情報として出力する出力部と、
を備える受信装置。 - 前記抽出部は、OTUフレームのオーバヘッドをマルチフレーム番号に基づいて識別することにより、OTUフレームのオーバヘッドのGCC領域又はRES領域に含まれるデータをレーン信号から抽出する、
請求項1に記載の受信装置。 - 前記抽出部は、前記複数のレーン各々についてデータを順次抽出し、
前記出力部は、前記抽出部によって順次抽出されたデータを集約して得た情報を、レーンの通信状態を示す情報として出力する、
請求項1又は2に記載の受信装置。 - OTUフレームのオーバヘッドに、OTUフレームを伝送するためのレーンの通信状態に関するデータを書き込む書込部と、
前記書込部によってデータが書き込まれたOTUフレームを複数のレーン信号に分配する分配部と、
前記分配部によって分配されたレーン信号を、複数のレーン各々を介して受信装置へ送信する送信部と、
を備える送信装置。 - OTUフレームを複数のレーン信号に分配する通信装置と双方向の通信をするための受信装置と送信装置とを備える光伝送装置であって、
前記受信装置は、
前記通信装置から複数のレーン各々を介して伝送されるレーン信号を受信する受信部と、
前記複数のレーン各々について前記受信部によって受信されたレーン信号から、OTUフレームのオーバヘッドに含まれるデータを抽出する抽出部と、
前記抽出部によって抽出されたデータに関する情報を、前記抽出部によってデータが抽出されたレーン信号を伝送するレーンの通信状態を示す情報として出力する出力部と、を有し、
前記送信装置は、
OTUフレームのオーバヘッドに、OTUフレームを伝送するためのレーンの通信状態に関するデータを書き込む書込部と、
前記書込部によってデータが書き込まれたOTUフレームを複数のレーン信号に分配する分配部と、
前記分配部によって分配されたレーン信号を、前記複数のレーン各々を介して前記通信装置へ送信する送信部と、
を有する、光伝送装置。 - 前記書込部は、レーンの通信状態が異常であることを示す情報が前記出力部によって出力された場合に、OTUフレームのオーバヘッドに書き込まれるデータのうち、通信状態が異常であると示されたレーンを介して伝送されるレーン信号に含まれるデータの書き込みを停止する、
請求項5に記載の光伝送装置。 - 請求項1から3のいずれか一項に記載の受信装置と、
前記受信装置に光通信回線を介して接続される請求項4に記載の送信装置と、
を備える光伝送システム。 - 前記書込部は、レーンに関わらず同一のデータが前記抽出部によって抽出されるように、OTUフレームのオーバヘッドにデータを書き込む、
請求項7に記載の光伝送システム。 - 前記書込部は、レーンに応じたデータが前記抽出部によって抽出されるように、OTUフレームのオーバヘッドにデータを書き込む、
請求項7に記載の光伝送システム。 - 前記受信装置は、レーンの通信状態が異常であることを示す情報が前記出力部によって出力された場合に、通信状態が異常であると示されたレーンを前記送信装置に通知する通知部を備え、
前記書込部は、OTUフレームのオーバヘッドに書き込まれるデータのうち、前記通知部によって通知されたレーンを介して伝送されるレーン信号に含まれるデータの書き込みを停止する、
請求項7から9のいずれか一項に記載の光伝送システム。 - OTUフレームを複数のレーン信号に分配する送信装置から複数のレーン各々を介して伝送されるレーン信号を受信する受信ステップと、
前記複数のレーン各々について前記受信ステップにおいて受信されたレーン信号から、OTUフレームのオーバヘッドに含まれるデータを抽出する抽出ステップと、
前記抽出ステップにおいて抽出されたデータに関する情報を、前記抽出ステップにおいてデータが抽出されたレーン信号を伝送するレーンの通信状態を示す情報として出力する出力ステップと、
を含む監視方法。
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JP2015552272A JP6033468B2 (ja) | 2013-12-13 | 2013-12-13 | 光伝送装置、光伝送システム及び通信方法 |
EP13898954.6A EP3082321A4 (en) | 2013-12-13 | 2013-12-13 | Reception device, transmission device, optical transmission device, optical transmission system, and monitoring method |
PCT/JP2013/083490 WO2015087446A1 (ja) | 2013-12-13 | 2013-12-13 | 受信装置、送信装置、光伝送装置、光伝送システム及び監視方法 |
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US10623090B2 (en) | 2018-05-24 | 2020-04-14 | At&T Intellectual Property I, L.P. | Multi-lane optical transport network recovery |
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