WO2022230175A1 - 接続ノード装置、光伝送システム及び接続方法 - Google Patents
接続ノード装置、光伝送システム及び接続方法 Download PDFInfo
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- WO2022230175A1 WO2022230175A1 PCT/JP2021/017206 JP2021017206W WO2022230175A1 WO 2022230175 A1 WO2022230175 A1 WO 2022230175A1 JP 2021017206 W JP2021017206 W JP 2021017206W WO 2022230175 A1 WO2022230175 A1 WO 2022230175A1
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- transmission line
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- 230000003287 optical effect Effects 0.000 title claims abstract description 1793
- 230000005540 biological transmission Effects 0.000 title claims abstract description 1655
- 238000000034 method Methods 0.000 title claims abstract description 136
- 238000004891 communication Methods 0.000 claims abstract description 342
- 230000010365 information processing Effects 0.000 claims abstract description 90
- 238000012545 processing Methods 0.000 claims description 218
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 230000004044 response Effects 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 description 99
- 238000013461 design Methods 0.000 description 60
- 230000006870 function Effects 0.000 description 37
- 238000001514 detection method Methods 0.000 description 35
- 238000010586 diagram Methods 0.000 description 27
- 238000004364 calculation method Methods 0.000 description 11
- 238000000926 separation method Methods 0.000 description 9
- 239000000835 fiber Substances 0.000 description 7
- 238000012937 correction Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
- H04J14/0293—Optical channel protection
- H04J14/0295—Shared protection at the optical channel (1:1, n:m)
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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
- H04Q11/0005—Switch and router aspects
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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
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
-
- 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
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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
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0016—Construction using wavelength multiplexing or demultiplexing
-
- 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
- H04Q2011/0073—Provisions for forwarding or routing, e.g. lookup tables
Definitions
- the present invention relates to a connection server device, an optical transmission system and a connection method.
- Digital signal processing for optical transmission that is, DSP (Digital Signal Processor)
- DSP Digital Signal Processor
- transmission performance such as baud rate, type of error correction code such as FEC (Forward Error Correction), number of carriers, etc.
- FEC Forward Error Correction
- Various parameters related to are increasing, and transmission modes are diversifying.
- proposals have been made for a technology for selecting an optimum transmission mode from among transmission modes determined by a combination of a plurality of parameters relating to transmission performance, and a messaging method for selecting the optimum transmission mode.
- Patent Document 1 discloses a method of selecting an optimum modulation scheme based on a training signal.
- Patent document 2 discloses a messaging method for selecting an optimum transmission mode corresponding to various parameters related to transmission performance such as baud rate, type of error correction code, number of carriers, etc., other than the modulation scheme.
- the present invention provides an optical path of an optimum transmission mode without human intervention when connecting optical transmission/reception units provided in an optical communication device via a plurality of optical transmission paths.
- the purpose is to provide technology that can
- connection information processing unit that acquires connection information including transmission line information that is information about an optical transmission line, a first optical transmission line, a second optical transmission line, and the connection information processing. and a connection destination of the first optical transmission line in an initial state is the connection information processing section, and the connection information processing section connects the connection information processing section to the first optical transmission line.
- connection information of the first optical transmission path acquired from an optical signal transmitted by an optical transceiver included in an optical communication device; connection request data transmitted by the optical transceiver included in the optical signal; a control unit configured to transmit transmission mode information indicating a transmission mode specified based on the transmission line information of the optical transmission line to the optical transmission/reception unit through the first optical transmission line, wherein the output port switching unit is a connection node device that performs switching processing for switching a connection destination of the first optical transmission line from the connection information processing unit to the second optical transmission line after the control unit transmits the transmission mode information.
- connection node device described above, a first optical communication device connected to the other end of the first optical transmission line to which the connection node device connects to one end, and the connection node device connected to one end a second optical communication device directly or indirectly connected to the connection node device via the second optical transmission line connected to the first optical communication
- An optical transmission/reception unit included in the device receives the transmission mode information transmitted through the first optical transmission line by the control unit of the connection node device, and selects the first transmission mode according to the transmission mode indicated by the received transmission mode information.
- An optical signal is transmitted/received through an optical transmission line, and an optical transmission/reception unit included in the second optical communication device receives the transmission mode information, and transmits/receives the second optical transmission line according to the transmission mode indicated by the received transmission mode information. and the output port switching unit of the connection node device performs the switching process after the control unit transmits the transmission mode information to the first optical communication device through the first optical transmission line.
- the optical transmission/reception unit included in the first optical communication device and the optical transmission/reception unit included in the second optical communication device via the first optical transmission line and the second optical transmission line. It is an optical transmission system to connect.
- the output port switching unit acquires connection information including a first optical transmission line, a second optical transmission line, and transmission line information that is information about the optical transmission lines. and a connection destination of the first optical transmission line in an initial state is the connection information processing unit, and the control unit causes the connection information processing unit to connect to the first optical transmission line.
- connection information of the first optical transmission line acquired from the optical signal transmitted by the optical transmission/reception unit provided in the optical transmission/reception unit; connection request data transmitted by the optical transmission/reception unit included in the optical signal; and the second optical transmission line transmission mode information indicating a transmission mode specified based on the transmission line information of the first optical transmission line to the optical transmission/reception unit, the output port switching unit and the control unit transmitting the transmission mode information is transmitted, the connection destination of the first optical transmission line is switched from the connection information processing unit to the second optical transmission line.
- the optical path of the optimum transmission mode enables connection without human intervention.
- FIG. 1 is a block diagram showing the configuration of an optical transmission system according to a first embodiment
- FIG. FIG. 2 is a diagram (part 1) showing the internal configurations of the connection node device and the optical communication device and the connection relationship of the optical transmission lines in each of the connection node device and the optical communication device in the first embodiment
- 4 is a diagram showing the flow of processing in the optical transmission system according to the first embodiment
- FIG. FIG. 2 is a diagram (part 2) showing the internal configurations of the connection node device and the optical communication device and the connection relationship of the optical transmission lines in each of the connection node device and the optical communication device in the first embodiment
- FIG. 4 is a block diagram showing the configuration of an optical transmission system according to a second embodiment
- FIG. 10 is a diagram showing the flow of processing in the optical transmission system according to the second embodiment
- FIG. 10 is a diagram showing another configuration example (Part 1) of the optical transmission system in the second embodiment
- FIG. 12 is a block diagram showing the configuration of an optical transmission system according to a third embodiment
- FIG. 11 is a diagram (part 1) showing the internal configurations of the connection node device and the optical communication device and the connection relationship of the optical transmission lines in each of the connection node device and the optical communication device in the third embodiment
- FIG. 10 is a diagram showing the flow of processing in an optical transmission system according to the third embodiment
- FIG. 12 is a diagram (part 2) showing the internal configurations of the connection node device and the optical communication device and the connection relationship of the optical transmission lines in each of the connection node device and the optical communication device in the third embodiment;
- FIG. 12 is a diagram (part 3) showing the internal configurations of the connection node device and the optical communication device and the connection relationship of the optical transmission lines in each of the connection node device and the optical communication device in the third embodiment;
- FIG. 11 is a diagram showing another configuration example (Part 1) of the optical transmission system in the third embodiment;
- FIG. 10 is a diagram illustrating another configuration example (part 2) of the optical transmission system according to the second embodiment;
- FIG. 11 is a diagram showing another configuration example (part 2) of the optical transmission system in the third embodiment;
- FIG. 10 is a diagram illustrating another configuration example (part 3) of the optical transmission system according to the second embodiment;
- FIG. 12 is a block diagram showing the configuration of an optical transmission system according to a fourth embodiment;
- FIG. 12 is a diagram showing the data structure of a connection state table of a transmission line designing unit according to the fourth embodiment;
- FIG. 13 is a diagram showing the flow of processing in an optical transmission system according to the fourth embodiment;
- FIG. 13 is a diagram showing the flow of transmission mode identification processing in the fourth embodiment;
- FIG. 1 is a block diagram showing the configuration of an optical transmission system 100 according to the first embodiment.
- the optical transmission system 100 includes a connection node device 1 , an optical communication device 2 X, an optical communication device 2 Y, an optical transmission line 51 , an optical transmission line 52 and a connection line 3 .
- the optical transmission line 51 connects the optical communication device 2X and the connection node device 1 .
- the optical transmission line 52 connects the optical communication device 2Y and the connection node device 1 .
- the connection line 3 connects the connection node device 1 and the optical communication device 2Y.
- the optical communication device 2X is, for example, a communication device used by a user.
- the optical communication device 2Y is, for example, an optical transmission device owned by a telecommunications carrier, that is, a node device in a communication network, or a white box transponder owned by a telecommunications carrier or a data center operator.
- connection node device 1 the optical communication device 2X, and the optical communication device 2Y
- the solid line with thin arrows indicates the path of the electrical data signal
- the solid line with the thick arrow indicates the path of the optical data signal
- the thin arrow indicates the path of the optical data signal.
- the dashed lines indicate the paths of electrical control signals
- the thin solid lines indicate electrical connections
- the thick solid lines indicate optical connections
- the dashed-dotted lines indicate connection lines.
- the optical transmission line 51 shown in FIG. 1 includes optical fibers 51T and 51R such as dark fibers, for example, as shown in FIG.
- the letters "T” and “R” are attached to the reference numeral "51".
- T means the transmission direction viewed from the optical communication device 2X and the reception direction viewed from the connection node device 1 and the optical communication device 2Y.
- R means the receiving direction viewed from the optical communication device 2X and the transmitting direction viewed from the connection node device 1 and the optical communication device 2Y.
- the optical transmission line 52 shown in FIG. 1 includes, as shown in FIG.
- connection line 3 is a communication line, and may be, for example, a wired communication line such as a dedicated line, a wireless communication line, a mobile communication network, a communication network such as the Internet network, It may be a DCN (Data Communication Network), and in the case of connection by an optical communication line, a part of the overhead area of the digital frame transferred by the optical signal may be allocated as the connection line 3.
- DCN Data Communication Network
- the optical communication device 2X is, for example, a transponder that transmits data given from an external device and outputs received data to the external device.
- the optical communication device 2X includes a controller 20X and an optical transmitter/receiver 21X.
- the controller 20X is connected to the optical transmitter/receiver 21X, controls the optical transmitter/receiver 21X, and inputs/outputs information to/from the optical transmitter/receiver 21X.
- the control unit 20X generates a connection request instruction signal when starting connection to the optical transmission/reception unit 21Y included in the optical communication device 2Y.
- the information indicating the type of the light source is, for example, whether the light source is of the type that outputs a predetermined single wavelength, or whether the light source is of the type that outputs by changing the wavelength. , and further, in addition to this information, information including information on wavelengths or wavelength bands that can be output by the light source.
- the optical transmitter 24X has a single-wavelength light source 25X. Therefore, the specification information of the optical transmitter/receiver 21X includes information that the light source provided in the optical transmitter 24X is of a type that outputs a predetermined single wavelength, and information that indicates the wavelengths that the light source can output. will be included.
- the optical communication device 2Y has the same functional units as the optical communication device 2X.
- "X" included in the reference numerals attached to each functional section provided in the optical communication device 2X is replaced with "Y".
- the optical receiver 33 includes an optical receiver 34 .
- the photodetector 34 is, for example, a PD, receives the optical signal output from the IF section 31, performs optical intensity detection on the received optical signal, and converts it into an electrical signal.
- the photodetector 34 outputs the electrical signal converted from the optical signal to the digital signal processing section 32 as a received data signal.
- the optical modulator 37 optically modulates the continuous light output from the single-wavelength light source 36 according to the basic modulation method of the fundamental mode designated by the control unit 12 based on the transmission data signal output from the digital signal processing unit 32 . I do.
- the digital signal processing unit 32 acquires the Q value (Quality factor), PMD (Polarization Mode Dispersion), CD (Chromatic Dispersion) and OSNR (Optical Signal-to-Noise Ratio), and connects the information.
- the Q value, PMD, CD, and OSNR may be included in the connection information by outputting them to the information generation unit 38 .
- the digital signal processing unit 32 outputs an electric transmission data signal to the optical modulator 37 .
- the connection information generator 38 outputs the connection request data read from the received data signal by the digital signal processor 32 and the generated connection information to the controller 12 .
- the control unit 12 specifies the address information of the optical transmission/reception units 21X and 21Y provided in each of the optical communication devices 2X and 2Y connected to the connection node device 1 and the optical transmission line corresponding to the address information in the internal storage area.
- a route information table is stored in advance in which the identification information for each route is associated with each other. Note that the control unit 12 may acquire the route information table from an external device or the like on demand instead of pre-storing the route information table in an internal storage area.
- identification information for specifying the optical transmission line 51 is associated with the address information of the optical transmitter/receiver 21X of the optical communication device 2X in the path information table.
- the identification information for specifying the optical transmission line 52 is associated with the address information of the optical transmission/reception unit 21Y.
- the control unit 12 refers to the route information table and detects identification information specifying the optical transmission line corresponding to the connection destination address information included in the connection request data output by the digital signal processing unit 32 .
- the address information of the optical transmission/reception unit 21Y is associated with the identification information specifying the optical transmission line 52, and the optical communication device 2X is connected to the optical transmission/reception unit 21Y. This configuration selects only the portion 21Y. Therefore, the control unit 12 always detects the identification information that identifies the optical transmission line 52 , and the following description assumes that the control unit 12 detects the identification information that identifies the optical transmission line 52 .
- the control unit 12 stores information indicating free resources of the optical transmission line 52 in an internal storage area.
- information indicating available resources is, for example, information indicating wavelengths, wavelength bands, or optical transmission paths that are not used for communication when judging resource availability. It should be noted that information indicating available resources is updated by the control unit 12 each time a communication path is established.
- the control unit 12 uses, for example, a transmission design tool provided therein to determine transmission line characteristics. (QoT (Quality of Transmission)) is calculated.
- QoT Quality of Transmission
- GNPy Global Noise model in Python
- the transmission path characteristics are values calculated by transmission design tools such as OSNR, GSNR (Generalized Signal-to-Noise Ratio), Q value, and BER.
- the information such as OSNR, GSNR, Q value, BER, etc. calculated by the transmission design tool is the OSNR, GSNR, Q value, BER, etc. of the entire optical transmission line including the optical transmission line 51 and the optical transmission line 52. information.
- the ONSR threshold determined for each modulation scheme included in the specification information of the optical transceiver 21X is compared with the calculated OSNR of the transmission path characteristics. Select a modulation scheme that is greater than or equal to the OSNR of the road characteristics.
- the transmission mode is specified by the configuration information selected by the control unit 12 .
- the configuration information specifying the transmission mode includes, for example, the modulation method, baud rate, bit rate, and FEC (Forward Error Correction) type selected in the above process, as well as the output optical power and usage.
- This is information including permitted signal bands and the like.
- the information of the FEC type that can be used in the optical transceiver 21Y is acquired in advance by the control unit 12 and stored in an internal storage area, or is acquired on demand from the optical transceiver 21Y or an external device. shall be Further, in the above predetermined selection process, among a plurality of bit rate candidates for each of the selected several modulation schemes, a bit rate equal to or higher than the bit rate indicated in the desired bit rate information and specified in the desired bit rate information. A combination of modulation scheme and baud rate that enables transmission at the bit rate closest to the indicated bit rate may be selected.
- the control unit 12 generates transmission mode information including the selected configuration information and the connection source address information included in the connection request data.
- the control unit 12 outputs the generated transmission mode information to the digital signal processing unit 32 .
- the control unit 12 is connected to the control unit 20Y of the optical communication device 2Y through, for example, the connection line 3, and transmits the generated transmission mode information to the control unit 20Y of the optical communication device 2Y.
- the control unit 12 outputs a control signal (hereinafter referred to as a “switching instruction signal”) that instructs the optical switch units 15T and 15R of the output port switching unit 14 to switch connection destinations.
- FIG. 3 is a flow chart showing the flow of processing by the optical transmission system 100.
- the output port switching unit 14 of the connection node device 1 sets the connection destination of the optical transmission line 51 to the connection information processing unit 13 of the connection node device 1 in the initial state. More specifically, the optical switch section 15T connects the optical fiber 51T to the optical receiver 34 via the IF section 31, and the optical switch section 15R connects the optical fiber 51R to the optical modulator via the IF section 31. 37.
- the control unit 20X of the optical communication device 2X generates a connection request instruction signal including the address information of the optical transmission/reception unit 21Y and the desired bit rate in order to connect to the optical transmission/reception unit 21Y provided in the optical communication device 2Y. do.
- the controller 20X outputs the generated connection request instruction signal to the controller 71X of the optical transceiver 21X.
- the control unit 71X takes in the connection request instruction signal output by the control unit 20X, and uses the address information of the optical transmission/reception unit 21Y included in the received connection request instruction signal as connection destination address information.
- the control unit 71X uses the address information of the optical transmission/reception unit 21X stored in the internal storage area as the connection source address information.
- the control unit 71X generates connection request data including connection destination address information, connection source address information, desired bit rate included in the connection request instruction signal, and specification information of the optical transmission/reception unit 21X stored in an internal storage area. to generate
- the control unit 71X outputs to the single-wavelength light source 25X an output optical power designation signal indicating a predetermined basic output optical power in the basic mode.
- the single-wavelength light source 25X generates and outputs continuous light of a predetermined wavelength at the basic output optical power designated by the output optical power designation signal received from the control section 71X.
- the control unit 71X outputs a modulation scheme designating signal indicating a basic modulation scheme predetermined in the basic mode to the optical modulator 26X.
- the optical modulator 26X starts optical modulation according to the basic modulation method designated by the modulation method designation signal received from the control section 71X.
- the optical switch section 15T receives the optical signal transmitted by the optical fiber 51T and outputs the received optical signal to the optical receiver 34 of the optical receiver section 33 via the IF section 31 .
- the optical receiver 34 takes in the optical signal output by the optical switch section 15T.
- the photodetector 34 converts the received optical signal into an electrical signal to obtain a received data signal.
- the photodetector 34 outputs the received data signal to the digital signal processing section 32 .
- the digital signal processor 32 takes in the reception data signal output by the photodetector 34 .
- the digital signal processing unit 32 reads the connection request data included in the overhead area of the received data signal and outputs it to the connection information generation unit 38 .
- the digital signal processing unit 32 obtains the BER of the optical transmission line 51 from the received data signal and outputs it to the connection information generating unit 38 .
- the connection information generator 38 takes in the connection request data output by the digital signal processor 32 and the BER. When the connection request data and the BER output by the digital signal processing unit 32 are taken in, the connection information generation unit 38 generates an optical signal based on the reception data signal that the digital signal processing unit 32 takes in and outputs to the connection information generation unit 38.
- the transmission line information of the transmission line 51 is calculated.
- the connection information generation unit 38 generates connection information including the calculated transmission line information of the optical transmission line 51 and the BER of the optical transmission line 51 .
- the connection information generation unit 38 outputs the fetched connection request data and the generated connection information to the control unit 12 (step S2).
- the control unit 12 takes in the connection request data output by the connection information generation unit 38 and the connection information.
- the control unit 12 refers to the route information table stored in the internal storage area or the route information table acquired on demand, and the connection destination address information included in the acquired connection request data, here, the optical transmission/reception data.
- Identification information for specifying the optical transmission line 52 corresponding to the address information of the portion 21Y is detected.
- the control unit 12 acquires the transmission line information of the optical transmission line 52 corresponding to the detected identification information by reading it from an internal storage area, or acquires the transmission line information of the optical transmission line 52 on demand.
- the control unit 12 calculates transmission line characteristics based on the acquired transmission line information of the optical transmission line 52 and the acquired connection information (step S3).
- the control unit 12 selects configuration information by a predetermined selection process based on the calculated transmission path characteristics, the desired bit rate information included in the connection request data, and the specification information of the optical transmission/reception unit 21X.
- the transmission mode is specified by the configuration information selected by the control unit 12 .
- the control unit 12 generates transmission mode information including the selected configuration information and the connection source address information included in the connection request data (step S4).
- the optical switch unit 15T Upon receiving the switching instruction signal from the control unit 12, the optical switch unit 15T connects the optical fiber 51T and the optical fiber 52T. Upon receiving the switching instruction signal from the control unit 12, the optical switch unit 15R connects the optical fiber 51R and the optical fiber 52R (step S7). Thereby, as shown in FIG. 4, the optical fiber 51T and the optical fiber 52T are connected via the optical switch section 15T, and the optical fiber 51R and the optical fiber 52R are connected via the optical switch section 15R. As a result, the optical transmitter/receiver 21X of the optical communication device 2X and the optical transmitter/receiver 21Y of the optical communication device 2Y are connected via the optical transmission line 51 and the optical transmission line 52, respectively.
- steps S5-1 and S5-2 may be performed in parallel, in the order of steps S5-1 and S5-2, or in the reverse order. good too.
- the connection information processing unit 13 acquires connection information including transmission line information, which is information about the optical transmission line.
- the output port switching unit 14 is connected to the optical transmission line 51 that is the first optical transmission line, the optical transmission line 52 that is the second optical transmission line, and the connection information processing unit 13, and in the initial state, optical transmission is performed.
- the connection destination of the path 51 is assumed to be the connection information processing section 13 .
- the control unit 12 controls the connection information of the optical transmission line 51 acquired by the connection information processing unit 13 from the optical signal transmitted by the optical transmission/reception unit 21X included in the optical communication device 2X connected to the optical transmission line 51, and the connection information of the optical transmission/reception unit 21X.
- the control unit 12 of the connection node device 1 performs the End-To- End, that is, the transmission path characteristics between one end of the optical transmission path 51 connected to the optical communication apparatus 2X and one end of the optical transmission path 52 connected to the optical communication apparatus 2Y are calculated.
- the transmission path characteristics may be calculated as follows.
- the control unit 12 calculates the transmission line characteristics of the optical transmission line 51 based on the connection information generated by the connection information processing unit 13 .
- the control unit 12 calculates the transmission line characteristics of the optical transmission line 52 based on the transmission line information of the optical transmission line 52 .
- the control unit 12 may calculate an approximate end-to-end transmission line characteristic based on the calculated transmission line characteristic of the optical transmission line 51 and the calculated transmission line characteristic of the optical transmission line 52 . For example, in the case of OSNR and GSNR included in the transmission line characteristics, the control unit 12 calculates the OSNR and GSNR of the optical transmission line 51 and the OSNR and GSNR of the optical transmission line 52 . Based on the calculated OSNR of the optical transmission line 51 and the calculated OSNR of the optical transmission line 52, the control unit 12 calculates an approximate end-to-end OSNR. Based on the calculated GSNR of the optical transmission line 51 and the calculated GSNR of the optical transmission line 52, an approximate GSNR of End-To-End is calculated.
- Each of the optical communication devices 2Y-1 to 2Y-n has the same configuration as the optical communication device 2Y of the first embodiment, ie, the same configuration as the optical communication device 2X.
- the “X” included in the reference numerals attached to each functional unit included in the optical communication device 2X is changed to “Y-1”. to "Yn”.
- Each of the optical transmission/reception units 21Y-1 to 21Y-n included in the optical communication devices 2Y-1 to 2Yn is provided with address information that can be identified in advance in the same manner as the optical transmission/reception unit 21X of the optical communication device 2X. It is
- Each of the optical transmission lines 52-1 to 52-n has two optical fibers, like the optical transmission line 52 of the first embodiment. It shall be shown with the symbols “T” and “R”. For example, the optical transmission line 52-1 is shown as optical fibers 52T-1 and 52R-1.
- Each of the connection lines 3-1 to 3-n is a communication line similar to the connection line 3. FIG.
- the connection node device 1a includes an edge function unit 11a and an output port switching unit 14.
- the output port switching unit 14 is connected to the optical transmission line 51, the connection information processing unit 13 of the connection node device 1a, and each of the optical transmission lines 52-1 to 52-n. Any one of the paths 52-1 to 52-n is selected as the connection destination of the optical transmission line 51, and the connection destination is switched.
- the control unit 12 a transmits the connection information output by the connection information generation unit 38 of the connection information processing unit 13 and the connection request data to the operation device 4 through the connection line 3 .
- the control unit 12 a outputs transmission mode information received from the operation device 4 to the digital signal processing unit 32 .
- the control unit 12a outputs a switching instruction signal for switching the connection destination to the output port switching unit 14.
- the operation device 4 includes a route detection section 41 and a transmission line design section 42 .
- the path detection unit 41 stores address information of the optical transmission/reception units 21X, 21Y-1 to 21Y-n of the optical communication devices 2X, 2Y-1 to 2Y-n and optical transmission corresponding to the address information in an internal storage area.
- a route information table in which identification information for specifying a route is associated with each other is stored in advance.
- the route detection unit 41 may acquire the route information table from an external device on demand instead of pre-storing the route information table in an internal storage area.
- the route detection unit 41 refers to the route information table, and selects the optical transmission lines 52-1 to 52-n corresponding to the connection destination address information included in the connection request data transmitted by the control unit 12a of the connection node device 1a. Identification information specifying any one of the optical transmission lines 52-i is detected (here, i is an arbitrary integer from 1 to n).
- the transmission line designing unit 42 stores information indicating free resources for each of the optical transmission lines 52-1 to 52-n in an internal storage area.
- information indicating available resources is, for example, information indicating wavelengths, wavelength bands, or optical transmission paths that are not used for communication when judging resource availability. It should be noted that information indicating available resources is updated by the transmission path designing unit 42 each time a communication path is established.
- the transmission line designing unit 42 selects the optical transmission line 52-i corresponding to the connection information transmitted by the control unit 12a of the connection node device 1a and the identification information identifying the optical transmission line 52-i detected by the route detection unit 41. Based on the transmission path information, transmission path characteristics are calculated using a transmission design tool such as GNPy provided inside.
- the transmission path design unit 42 stores address information of the optical transceivers 21Y-1 to 21Y-n included in the optical communication devices 2Y-1 to 2Y-n and the optical communication device 2Y corresponding to the address information in an internal storage area.
- a connection line table in which connection lines 3-1 to 3-n to which -1 to 2Y-n are connected is stored in advance.
- the transmission line designing unit 42 refers to the connection line table stored in the internal storage area, and transmits the generated transmission mode information to the optical transmission/reception unit 21Y-1 corresponding to the connection destination address information included in the connection request data. to the control units 20Y-1 to 20Y-n of the optical communication devices 2Y-1 to 2Y-n through the connection lines 3-1 to 3-n connected to the optical communication devices 2Y-1 to 2Y-n provided with . Send.
- the route detection unit 41 of the operation device 4 receives the connection request data transmitted by the control unit 12a.
- the route detection unit 41 refers to the route information table stored in the internal storage area or the route information table acquired on demand, and detects the connection destination address information included in the received connection request data. Identification information specifying the optical transmission line 52-i corresponding to the address information of the transmitting/receiving unit 21Y-i is detected.
- the path detection unit 41 outputs identification information specifying the detected optical transmission line 52-i to the transmission line design unit 42 (step Sa4).
- the transmission line design unit 42 receives the connection information and the connection request data transmitted by the control unit 12a.
- the transmission line designing section 42 takes in the identification information for specifying the optical transmission line 52-i outputted by the path detecting section 41.
- the transmission line designing unit 42 acquires the transmission line information of the optical transmission line 52-i corresponding to the captured identification information specifying the optical transmission line 52-i from the internal storage area, or obtains it on demand.
- the transmission line information of the optical transmission line 52-i is acquired.
- the transmission line designing unit 42 calculates transmission line characteristics based on the acquired transmission line information of the optical transmission line 52-i and the received connection information (step Sa5).
- the transmission line designing unit 42 selects the configuration information by a predetermined selection process based on the calculated transmission line characteristics, the desired bit rate information included in the received connection request data, and the specification information of the optical transmitting/receiving unit 21X. do.
- the transmission mode is specified by the configuration information selected by the transmission line design unit 42 .
- the transmission line designing unit 42 generates transmission mode information including the selected configuration information and the connection source address information included in the connection request data (step Sa6).
- the transmission line designing unit 42 transmits the generated transmission mode information and the identification information specifying the optical transmission line 52-i detected by the route detecting unit 41 to the connection node device 1a through the connection line 3 (step Sa7- 2).
- the control unit 12a of the connection node device 1a receives the transmission mode information transmitted by the transmission line designing unit 42 of the operation device 4 and the identification information specifying the optical transmission line 52-i.
- the control unit 12a receives the transmission mode information and the identification information specifying the optical transmission line 52-i
- the control unit 12a, the connection information processing unit 13, and the output port switching unit 14 are controlled based on the received transmission mode information.
- the same processing as in step S5-2 of the first embodiment is performed (step Sa8-2).
- the same processing as step S6-2 of the first embodiment is performed (step Sa9).
- the optical switch unit 15T Upon receiving the switching instruction signal from the control unit 12a, the optical switch unit 15T connects the optical fiber 51T and the optical fiber 52T-i.
- the optical switch unit 15R Upon receiving the switching instruction signal from the control unit 12a, the optical switch unit 15R connects the optical fiber 51R and the optical fiber 52R-i (step Sa10).
- the optical fiber 51T and the optical fiber 52T-i are connected via the optical switch section 15T
- the optical fiber 51R and the optical fiber 52R-i are connected via the optical switch section 15R.
- the optical communication device 2X and the optical communication device 2Y-i are connected via the optical transmission line 51 and the optical transmission line 52-i.
- the optical communication device 2X which is the first optical communication device, connects to the connection node device 1a via the optical transmission line 51, which is the first optical transmission line.
- Optical communication devices 2Y-1 to 2Y-n which are second optical communication devices, are connected to the connection node device 1a via optical transmission lines 52-1 to 52-n, which are second optical transmission lines.
- the operation device 4 connects to the connection node device 1a and each of the optical communication devices 2Y-1 to 2Y-n.
- the operation device 4 acquires the transmission line information of the optical transmission line 52-i stored in advance in the internal storage area by reading from the internal storage area, or transmits the information on the optical transmission line 52-i on demand.
- the path information is acquired, and the acquired transmission path information of the optical transmission path 52-i and the connection information processing unit 13 of the connection node device 1a acquire from the optical signal transmitted by the optical transmission/reception unit 21X included in the optical communication device 2X.
- the transmission mode is specified based on the connection information of the optical transmission line 51 and the connection request data included in the optical signal and transmitted by the optical transceiver 21X included in the optical communication device 2X, and the transmission mode information indicating the specified transmission mode is generated. , to the controller 12a of the connection node device 1a and the optical transmitter/receiver 21Y-i provided in the optical communication device 2Y-i.
- the optical transmission/reception unit 21X provided in the optical communication device 2X receives the transmission mode information that the control unit 12a of the connection node device 1a receives from the operation device 4 and outputs to the optical transmission line 51, and transmits the transmission mode information indicated by the received transmission mode information. An optical signal is transmitted and received through the optical transmission line 51 according to the mode.
- the optical transmitter/receiver 21Y-i included in the optical communication device 2Y-i transmits and receives an optical signal through the optical transmission path 52-i in the transmission mode indicated by the transmission mode information received from the operation device 4.
- the output port switching unit 14 of the connection node device 1a After the control unit 12a transmits the transmission mode information to the optical communication device 2X through the optical transmission line 51, the output port switching unit 14 of the connection node device 1a performs switching processing to switch the output port switching unit 14 of the optical communication device 2X to the optical transmission/reception unit 21X. and the optical transmitter/receiver 21Y-i provided in the optical communication device 2Y-i are connected via the optical transmission lines 51 and 52.
- FIG. As a result, when connecting the optical transmission/reception units 21X and 21Y-i provided in the optical communication devices 2X and 2Y-i via a plurality of optical transmission paths 51 and 52-i, the optical path of the optimum transmission mode can be established. can be connected without human intervention. Therefore, it is possible to reduce the cost and time required for setting the optical path.
- the transmission line design unit 42 refers to the connection line table stored in the internal storage area, and sets the transmission mode information to the connection destination address information included in the transmission mode information.
- the transmission path design unit 42a provided in the operation device 4a adds the connection destination address information included in the connection request data to the generated transmission mode information, It is transmitted to the controller 20aY of the optical communication device 2cY through the connection line 3-1. Therefore, the transmission line designing unit 42a does not need to store the connection line table in advance in the internal storage area.
- the control unit 20aY has the same configuration as that of each of the control units 20Y-1 to 20Y-n except for the following configuration.
- each of the control units 20Y-1 to 20Y-n receives the transmission mode information transmitted by the transmission line design unit 42a, it outputs the received transmission mode information to the optical transmission/reception units 21Y-1 to 21Y-n connected thereto.
- the control unit 20aY receives the transmission mode information transmitted by the transmission line designing unit 42a through the connection line 3-1
- the control unit 20aY receives the transmission mode information corresponding to the connection destination address information attached to the received transmission mode information. It outputs the transmission mode information to one of the optical transceivers 21Y-1 to 21Y-n.
- the connection destination address information of the connection request data is the address information of the optical transmission/reception unit 21Y-i requesting the connection.
- the optical transmission/reception unit 21Y-i corresponding to the connection destination address information is connected via the optical transmission lines 51 and 52-i, and the same transmission mode is established between the optical transmission/reception unit 21X and the optical transmission/reception unit 21Y-i. It is possible to transmit and receive optical signals by
- FIG. 8 is a block diagram showing the configuration of the optical transmission system 102 according to the third embodiment.
- the optical transmission system 102 includes a connection node device 1b, an optical communication device 2aX, a plurality of optical communication devices 2bY-1 to 2bY-n, an operation device 4b, an optical transmission line 51, optical transmission lines 52-1 to 52-n, connections It has a line 3 and connection lines 3-1 to 3-n.
- the optical communication device 2aX is, for example, a communication device used by a user, and the optical communication devices 2bY-1 to 2bY-n are, for example, optical transmission devices owned by a communication carrier, that is, node devices in a communication network. , or a white-box transponder owned by a carrier or data center operator.
- the optical transmission line 51 connects the optical communication device 2aX and the connection node device 1b.
- the optical transmission lines 52-1 to 52-n connect each of the optical communication devices 2bY-1 to 2bY-n and the connection node device 1b.
- the connection line 3 connects the operation device 4b and the connection node device 1b.
- the connection lines 3-1 to 3-n connect the operation device 4b and the optical communication devices 2bY-1 to 2bY-n, respectively.
- the control unit 20aX is connected to each of the optical transmission/reception units 21aX-1 to 21aX-m, and controls each of the optical transmission/reception units 21aX-1 to 21aX-m and communicates with the optical transmission/reception units 21aX-1 to 21aX-m. Input and output information between Further, when the control unit 20aX starts connection to any one of the optical transmission/reception units 21aY-1 to 20aY-n provided in each of the optical communication devices 2bY-1 to 2bY-n, Generate a connection request indication signal.
- the optical transmission/reception unit 21aX-1 includes an IF unit 22X-1, an optical transmission unit 24aX-1, an optical reception unit 27X-1, a digital signal processing unit 23aX-1, and a control unit 71aX-1.
- the IF section 22X-1 connects the optical transmission section 24aX-1 and the optical fiber 51T via the wavelength multiplexing section 8aX provided in the wavelength demultiplexing section 6aX.
- the IF section 22X-1 connects the optical receiving section 27X-1 and the optical fiber 51R via the wavelength demultiplexing section 7aX provided in the wavelength demultiplexing section 6aX.
- the control unit 71aX-1 receives a connection request instruction from the control unit 20aX, for example, when starting connection to any one of the optical transmission/reception units 21aY-1 to 21aY-n provided in the optical communication devices 2bY-1 to 2bY-n. It receives the signal and generates connection request data of an electrical signal requesting connection.
- the specification information of the optical transmitter/receiver 21aX-1 included in the connection request data in the third embodiment includes, for example, the modulation method, the FEC type, and the baud rate that can be used by the optical transmitter 24aX-1.
- the optical transmitter-receivers 21aX-1 to 21aX-m provided in the optical communication device 2aX and the optical transmitter-receivers 21aY-1 to 21aY-n provided in the optical communication devices 2bY-1 to 2bY-n are provided with addresses capable of identifying each of them. Information is provided in advance.
- the control unit 20aX stores the desired bit rate and the address information of the connection destination in advance in an internal storage area.
- the control unit 71aX-1 of the optical transmission/reception unit 21aX-1 stores the address information given to the optical transmission/reception unit 21aX-1 provided therein in advance in an internal storage area.
- the controller 20aX when requesting connection from the optical transmitter/receiver 21aX-1 to the optical transmitter/receiver 21aY-i included in the optical communication device 2aY-i, the controller 20aX receives the address information of the optical transmitter/receiver 21aY-i and the desired bit rate. and output to the controller 71aX-1 of the optical transmitter/receiver 21aX-1.
- the control unit 71aX-1 reads out the address information of the optical transmission/reception unit 21aY-i included in the connection request instruction signal received from the control unit 20aX and uses it as connection destination address information. -1 address information is read and used as connection source address information.
- the control unit 71aX-1 receives, for example, the optical input information disclosed in Patent Document 2, which includes information such as the wavelength multiplexing number of the optical transmission unit 24aX-1 collected in advance, OutPut-Power, and TxOSNR. are collected from information about the optical transceiver 21aX-1, such as the type of transceiver and the number of transceivers included in the optical transceiver 21aX-1.
- the control section 71aX-1 outputs the collected optical input information to the digital signal processing section 23aX-1.
- the digital signal processing unit 23aX-1 has the following configuration in addition to the configuration included in the digital signal processing unit 23X of the first embodiment.
- the digital signal processing unit 23aX-1 When the optical input information output by the control unit 71aX-1 is transmitted by the transmission data signal, the digital signal processing unit 23aX-1 generates the transmission data signal so that the optical input information is included in the communication channel of the transmission frame.
- the connection node device 1b includes an edge function unit 11b and an output port switching unit 14a.
- the output port switching unit 14a includes, for example, optical switch units 15aT and 15aR such as WSS (Wavelength Selective Switch) and FiberPatchPanel, a wavelength demultiplexer 7a, and a wavelength multiplexer 8a.
- the wavelength demultiplexing unit 7a connects the optical fiber 51T and the optical switch unit 15aT, demultiplexes the optical signals wavelength-multiplexed in the optical fiber 51T by wavelength, and sends each of the demultiplexed optical signals to the optical switch unit. Output to 15aT.
- the connection information generation unit 38a calculates the transmission line information of the optical transmission line 51 based on the received data signal output by the digital signal processing unit 32a of the connection information processing unit 13a.
- the connection information generation unit 38a generates connection information including the calculated transmission line information of the optical transmission line 51, the BER of the optical transmission line 51 output by the digital signal processing unit 32a, and the optical input information.
- the connection information generator 38a outputs the generated connection information and the connection request data output by the digital signal processor 32a to the controller 12b.
- the control unit 12b stores address information of the optical transmission/reception units 21aX-1 to 21aX-m and 21aY-1 to 21aY-n provided in each of the optical communication devices 2aX and 2bY-1 to 2bY-n connected to the connection node device 1b. Identification information for specifying the optical transmission lines 51, 52-1 to 52-n to which the optical transmission/reception units 21aX-1 to 21aX-m and 21aY-1 to 21aY-n corresponding to the respective address information are connected for each
- the address path correspondence table associated with is stored in advance in an internal storage area.
- the control unit 12b may acquire the address route correspondence table from an external device on demand instead of storing the address route correspondence table previously acquired in the internal storage area.
- the control unit 12b transmits the connection request data output by the connection information generation unit 38a and the connection information through the connection line 3 to the operation device 4b.
- the control unit 12b outputs the transmission mode information received from the operation device 4b to the digital signal processing unit 32a.
- the control section 12b outputs a switching instruction signal to the output port switching section 14a.
- the operation device 4b includes a route detection unit 41 and a transmission line design unit 42b.
- the transmission line designing section 42b has the same configuration as the transmission line designing section 42 of the second embodiment except for the configuration described below.
- the transmission line designing unit 42b like the transmission line designing unit 42 of the second embodiment, creates an optical transmission line 52-1 corresponding to the calculated transmission line characteristics and the connection destination address information included in the connection request data. 52-n, the desired bit rate information included in the connection request data acquired by the digital signal processing unit 32a, and the specification information of the optical transceivers 21aX-1 to 21aX-m. Then, configuration information is selected by predetermined selection processing.
- the configuration information selected by the transmission line designing unit 42b includes the output optical power, modulation method, baud rate, bit rate, FEC (Forward Error Correction) selected by the transmission line designing unit 42 of the second embodiment.
- Information on the center wavelength is included in addition to information such as the type and signal band that is permitted to be used, and information on the number of WDM wavelengths may also be included.
- the wavelength demultiplexer 6aX includes a wavelength multiplexer 8aX and a wavelength demultiplexer 7aX.
- the wavelength multiplexing unit 8aX multiplexes and wavelength-multiplexes the optical signals of different wavelengths output from the IF units 22X-1 to 22X-m provided in the optical transmitting/receiving units 21aX-1 to 21aX-m, and generates the wavelength-multiplexed optical signals. It is sent to the optical fiber 51T.
- the wavelength demultiplexer 7aX demultiplexes the wavelength-multiplexed optical signal transmitted through the optical fiber 51R for each wavelength.
- the wavelength demultiplexing unit 7aX outputs each demultiplexed optical signal to the IF units 22X-1 to 22X-m corresponding to each wavelength.
- the wavelength demultiplexer 7aX should be connected to the optical transmitter/receivers 21aX-1 to 21aX-m in the basic mode. optical signals are output to all of the
- the control unit 20aX of the optical transmission/reception unit 21aX-1 stores the address information of the optical transmission/reception unit 21aY-i and the desired bit rate in order to connect to the optical transmission/reception unit 21aY-i provided in the optical communication device 2bY-i. to generate a connection request indication signal including
- the controller 20aX outputs the generated connection request instruction signal to the controller 71aX-1 of the optical transceiver 21aX-1.
- the control unit 71aX-1 After receiving the connection request signal output by the control unit 20aX, the control unit 71aX-1 receives the timing signal output by the transmission control unit 29X, and starts processing at the timing indicated by the received timing signal (step Sb1). .
- the control unit 71aX-1 uses the address information of the optical transmission/reception unit 21aY-i included in the received connection request signal as the connection destination address.
- the control unit 71aX-1 uses the address information of the optical transmission/reception unit 21aX-1 stored in the internal storage area as connection source address information.
- the control unit 71aX-1 receives the connection destination address information, the connection source address information, the desired bit rate included in the connection request instruction signal, and the specification information of the optical transmission/reception unit 21aX-1 stored in the internal storage area.
- Generate connection request data that contains:
- the control unit 71aX-1 outputs an output optical power designation signal indicating a predetermined basic output optical power in the basic mode to the wavelength tunable light source 25aX-1.
- the controller 71aX-1 outputs a wavelength designation signal of a predetermined fundamental wavelength in the fundamental mode to the wavelength tunable light source 25aX-1.
- the control unit 71aX-1 outputs a predetermined basic mode modulation method designating signal to the optical modulator 26X-1.
- the optical modulator 26X-1 starts optical modulation according to the basic modulation method designated by the modulation method designation signal.
- the wavelength tunable light source 25aX-1 generates continuous light having a basic output optical power specified by the output optical power specifying signal and a basic wavelength specified by the wavelength specifying signal.
- the wavelength tunable light source 25aX-1 outputs the generated continuous light to the optical modulator 26X-1.
- the controller 71aX-1 outputs the generated connection request data and the collected optical input information to the digital signal processor 23aX-1.
- the digital signal processing unit 23aX-1 takes in the connection request data output by the control unit 71aX-1 and the optical input information, and arranges the received connection request data to be included in the empty area of the overhead of the transmission frame and the optical input data.
- a transmit data signal is generated such that the input information is included in the communication channel of the transmission frame.
- the digital signal processing unit 23aX-1 outputs the generated transmission data signal of the electric signal to the optical modulator 26X-1.
- the wavelength separation unit 7a demultiplexes the optical signal transmitted by the optical fiber 51T according to wavelength, and outputs each of the demultiplexed optical signals to the optical switch unit 15aT.
- the optical switch unit 15aT receives the optical signal of the fundamental wavelength transmitted by the wavelength path 61T-B of the fundamental wavelength of the optical fiber 51T, and transmits the received optical signal to the optical receiver of the optical receiver 33 via the IF unit 31. 34.
- the optical receiver 34 takes in the optical signal output by the optical switch section 15aT.
- the photodetector 34 converts the received optical signal into an electrical signal to obtain a received data signal.
- the photodetector 34 outputs the received data signal to the digital signal processing section 32a.
- the digital signal processing unit 32a takes in the reception data signal output by the photodetector 34.
- the digital signal processing unit 32a reads and acquires the connection request data included in the overhead area of the received data signal.
- the digital signal processing unit 32a reads and acquires the optical input information included in the communication channel of the received data signal.
- the digital signal processing unit 32a obtains the BER of the optical transmission line 51 from the received data signal.
- the digital signal processor 32a outputs the acquired connection request data, the optical input information, and the BER of the optical transmission line 51 to the connection information generator 38a.
- the connection information generation unit 38a takes in the connection request data output by the digital signal processing unit 32a, the optical input information, and the BER of the optical transmission line 51.
- the connection information generation unit 38a takes in the connection request data, the optical input information, and the BER of the optical transmission line 51
- the connection information generation unit 38a generates an optical The transmission line information of the transmission line 51 is calculated and acquired.
- the connection information generator 38 a generates connection information including the calculated transmission line information of the optical transmission line 51 , the captured optical input information, and the captured BER of the optical transmission line 51 .
- the connection information generation unit 38a outputs the fetched connection request data and the generated connection information to the control unit 12b (step Sb3).
- the control unit 12b takes in connection request data and connection information output by the connection information generation unit 38a. Control unit 12b transmits the fetched connection request data and connection information to operation device 4b through connection line 3 (step Sb4).
- the route detection unit 41 of the operation device 4b receives the connection request data transmitted by the control unit 12b.
- the route detection unit 41 refers to the route information table stored in the internal storage area or the route information table acquired on demand, and detects the connection destination address information included in the received connection request data.
- the identification information specifying the optical transmission line 52-i corresponding to the address information of the transmitting/receiving section 21aY-i is detected.
- the path detection unit 41 outputs identification information specifying the detected optical transmission line 52-i to the transmission line design unit 42b (step Sb5).
- the transmission line design unit 42b receives the connection information and the connection request data transmitted by the control unit 12b.
- the transmission line designing unit 42b takes in the identification information for specifying the optical transmission line 52-i outputted by the route detection unit 41.
- the transmission line designing unit 42b acquires the transmission line information of the optical transmission line 52-i corresponding to the captured identification information specifying the optical transmission line 52-i from the internal storage area, or obtains it on demand.
- the transmission line information of the optical transmission line 52-i is acquired.
- the transmission line designing unit 42b calculates transmission line characteristics based on the acquired transmission line information of the optical transmission line 52-i and the received connection information (step Sb6).
- the transmission line designing unit 42b selects the configuration information through a predetermined selection process based on the calculated transmission line characteristics, the desired bit rate information included in the received connection request data, and the specification information of the optical transmission/reception unit 21aX-1. to select.
- the transmission mode is specified by the configuration information selected by the transmission path design unit 42b.
- the transmission line designing unit 42b generates transmission mode information including the selected configuration information and the connection source address information included in the connection request data (step Sb7).
- the transmission line designing unit 42b refers to the connection line table stored in the internal storage area, and transmits the generated transmission mode information to the optical transmission/reception unit 21aY-i corresponding to the connection destination address information included in the connection request data. to the controller 20Y-i of the optical communication device 2bY-i through the connection line 3-i connected to the optical communication device 2bY-i (step Sb8-1).
- the control unit 20Y-i of the optical communication device 2bY-i receives the transmission mode information transmitted by the transmission line design unit 42b, and outputs the received transmission mode information to the control unit 71aY-i of the optical transmission/reception unit 21aY-i. .
- the controller 71aY-i takes in the transmission mode information output by the controller 20Y-i.
- the control unit 71aY-i outputs an output optical power designation signal indicating the output optical power indicated in the received transmission mode information to the wavelength tunable light source 25aY-i, and determines the center wavelength designated in the received transmission mode information. to the wavelength tunable light source 25aY-i.
- the wavelength tunable light source 25aY-i outputs continuous light of the wavelength designated by the wavelength designation signal at the output light power designated by the output light power designation signal. Generates and outputs continuous light of wavelengths.
- the wavelength tunable light source 25aY-i outputs the generated continuous light to the optical modulator 26Y-i.
- the control unit 71aY-i outputs a modulation method designation signal indicating the modulation method designated by the received transmission mode information to the optical modulator 26Y-i.
- the optical modulator 26Y-i performs optical modulation using the modulation method specified by the modulation method specifying signal received from the control section 71aY-i, ie, the modulation method indicated by the transmission mode information.
- the control section 71aY-i outputs the transmission mode information to the digital signal processing section 23aY-i.
- the digital signal processing unit 23aY-i acquires the transmission mode information output by the control unit 71aY-i, and modulates the modulation method, baud rate, bit rate, FEC type, and permitted signal band shown in the acquired transmission mode information. etc.
- the control unit 71aY-i stores the modulation method, baud rate, bit rate, FEC type, signal band permitted to use, etc. indicated in the transmission mode information as setting parameters in an internal storage area. may In this case, the control section 71aY-i outputs the setting parameter to the digital signal processing section 23aY-i when the digital signal processing section 23aY-i generates the transmission data signal.
- the transmission line design unit 42b of the operation device 4b transmits transmission mode information indicating the specified transmission mode and identification information specifying the optical transmission line 52-i detected by the path detection unit 41 to the connection node device through the connection line 3. 1b (step Sb8-2).
- the control unit 12b of the connection node device 1b receives the transmission mode information transmitted by the transmission line designing unit 42b and the identification information specifying the optical transmission line 52-i.
- the control unit 12 outputs an output light power designation signal designating the fundamental output light power of the fundamental mode to the single-wavelength light source 36, and a modulation method designating the fundamental modulation method of the fundamental mode to the optical modulator 37. Output the specified signal.
- the control unit 12b outputs the received transmission mode information to the digital signal processing unit 32a.
- the digital signal processing unit 32a takes in the transmission mode information output by the control unit 12b.
- the digital signal processing unit 32a generates a transmission data signal so that the acquired transmission mode information is included in the empty area of the overhead of the transmission frame.
- the digital signal processing unit 32 a outputs the generated transmission data signal of the electric signal to the optical modulator 37 .
- the optical modulator 37 optically modulates the continuous light of the fundamental wavelength output from the single-wavelength light source 36 according to a predetermined fundamental mode modulation method, based on the transmission data signal output from the digital signal processing unit 32a. .
- the optical modulator 37 outputs an optical signal generated by optical modulation to the IF section 31 .
- the IF section 31 takes in the optical signal of the fundamental wavelength output from the optical modulator 37 .
- the IF section 31 outputs the received optical signal to the optical switch section 15aR.
- the optical switch unit 15aR outputs the optical signal of the fundamental wavelength output from the IF unit 31 to the wavelength multiplexing unit 8a.
- the wavelength multiplexing unit 8a multiplexes and wavelength-multiplexes the optical signals of a plurality of wavelengths including the optical signal of the fundamental wavelength output from the optical switch unit 15aR, and outputs the wavelength-multiplexed optical signal to the optical fiber 51R.
- the wavelength path 61R-B of the fundamental wavelength of the optical fiber 51R transmits the optical signal sent from the optical switch section 15aR to the wavelength separation section 7aX of the optical communication device 2aX (step Sb9-2).
- the wavelength separating unit 7aX demultiplexes the optical signal transmitted by the optical fiber 51R for each wavelength.
- the wavelength demultiplexing unit 7aX outputs each demultiplexed optical signal to the IF units 22X-1 to 22X-m corresponding to each wavelength.
- the wavelength demultiplexer 7aX is the optical receiver included in all the optical transceivers 21aX-1 to 21aX-m connected to the edge function unit 11b of the connection node device 1b at the fundamental wavelength.
- Optical signals of the fundamental wavelength are output to 27X-1 to 27X-m via IF units 22X-1 to 22X-m.
- the IF section 22X-1 of the optical transmission/reception section 21aX-1 takes in the optical signal of the fundamental wavelength output from the wavelength separation section 7aX.
- the IF section 22X-1 outputs the captured optical signal of the fundamental wavelength to the photodetector 28X-1.
- the optical receiver 28X-1 receives the optical signal output from the IF section 22X-1, converts the received optical signal into an electrical signal, and obtains a received data signal containing transmission mode information.
- the photodetector 28X-1 outputs a reception data signal including transmission mode information to the digital signal processing section 23aX-1.
- the digital signal processor 23aX-1 takes in the received data signal including the transmission mode information output from the photodetector 28X-1.
- the digital signal processing unit 23aX-1 reads the transmission mode information from the overhead area of the received data signal.
- the digital signal processing unit 23aX-1 outputs the read transmission mode information to the control unit 71aX-1.
- the control unit 71aX-1 acquires the transmission mode information output from the digital signal processing unit 23aX-1, and the address information included in the acquired transmission mode information is stored in the internal storage area of the optical transmission/reception unit 21aX-1. If it is not the address information given to , the read transmission mode information is discarded. On the other hand, if the address information included in the fetched transmission mode information matches the address information given to the optical transmitter/receiver 21aX-1, the control unit 71aX-1 changes the fetched transmission mode information.
- An output optical power designation signal indicating the indicated output optical power is output to the wavelength tunable light source 25aX-1.
- the digital signal processing unit 23aX-1 outputs a wavelength specifying signal indicating the center wavelength specified in the read transmission mode information to the wavelength tunable light source 25aX-1.
- the wavelength tunable light source 25aX-1 outputs continuous light of the wavelength designated by the wavelength designation signal at the output light power designated by the output light power designation signal, that is, the output light power and the output light power indicated by the transmission mode information. Generates and outputs continuous light with a central wavelength.
- the wavelength tunable light source 25aX-1 outputs the generated continuous light to the optical modulator 26X-1.
- the control unit 71aX-1 outputs to the optical modulator 26X-1 a modulation method designation signal indicating the modulation method designated by the received transmission mode information.
- the optical modulator 26X-1 performs optical modulation according to the modulation method designated by the modulation method designation signal received from the control section 71aX-1. As a result, the optical modulator 26X-1 stops optical modulation in the basic mode and starts optical modulation in the modulation scheme specified in the transmission mode information.
- the control unit 71aX-1 outputs transmission mode information to the digital signal processing unit 23aX-1.
- the digital signal processing unit 23aX-1 acquires the transmission mode information output by the control unit 71aX-1, and modulates the modulation method, baud rate, bit rate, FEC type, and permitted signal band shown in the acquired transmission mode information. etc. are stored in the internal storage area as setting parameters.
- the digital signal processing unit 23aX-1 When generating the transmission data signal, the digital signal processing unit 23aX-1 generates the transmission data signal based on the setting parameters stored in the internal storage area and outputs the transmission data signal to the optical modulator 26X-1 (step Sb10).
- the control unit 71aX-1 stores the modulation method, baud rate, bit rate, FEC type, permitted signal band, etc. indicated in the transmission mode information as setting parameters in an internal storage area. may In this case, the control section 71aX-1 outputs the setting parameter to the digital signal processing section 23aX-1 when the digital signal processing section 23aX-1 generates the transmission data signal.
- the control unit 12b of the connection node device 1b stores the internal storage area based on the connection source address information included in the received transmission mode information, here, the address information given to the optical transmission/reception unit 21aX-1.
- Identification information for specifying the optical transmission line 51 is detected from the stored address route correspondence table or the address route correspondence table acquired on demand. Based on the identification information identifying the detected optical transmission line 51, the identification information identifying the received optical transmission line 52-i, and the central wavelength specified in the transmission mode information, the control unit 12b performs optical transmission. The wavelength route of the optical transmission line 51-i with the central wavelength specified in the transmission mode information and the wavelength route of the optical transmission line 52-i with the central wavelength specified in the transmission mode information. A switching instruction signal for connection is generated. The control unit 12b outputs the generated switching instruction signal to the output port switching unit 14a.
- the controller 12b sets the connection destination of the wavelength path 61T-1 of the wavelength path of the optical fiber 51T and of the center wavelength specified in the transmission mode information to the optical fiber 52T.
- -i wavelength path and the wavelength path 62T-i of the center wavelength designated in the transmission mode information is output to the optical switch section 15aT of the output port switching section 14a.
- the control unit 12b sets the connection destination of the wavelength path 61R-1 of the center wavelength, which is the wavelength path of the optical fiber 51R and is specified in the transmission mode information, to the wavelength path of the optical fiber 52R-i in the transmission mode information.
- a switching instruction signal to the wavelength path 62R-i of the designated center wavelength is output to the optical switch section 15aR.
- the optical switch section 15aT Upon receiving the switching instruction signal from the control section 12b, the optical switch section 15aT connects the wavelength path 61T-1 of the optical fiber 51T and the wavelength path 62T-i of the optical fiber 52T-i.
- the optical switch unit 15aR Upon receiving the switching instruction signal from the control unit 12b, the optical switch unit 15aR connects the wavelength path 61R-1 of the optical fiber 51R and the wavelength path 62R-i of the optical fiber 52R-i (step Sb11).
- the optical transmitter/receiver 21aX-1 and the optical transmitter/receiver 21aY-i are connected via the wavelength paths 61T-1 and 62T-i and the wavelength paths 61R-1 and 62R-i.
- the optical transmission/reception unit 21aX-m transmits connection request data having the connection destination address information of the optical transmission/reception unit 21aY-j of the optical communication device 2bY-j.
- the connection node device 1b Suppose that it is transmitted to the connection node device 1b through the wavelength path 61T-B of the fundamental wavelength.
- the optical transmitter/receiver 21aX-m and the optical transmitter/receiver 21aY-j are connected to a wavelength path 61T-2 included in the optical transmission line 51 and a wavelength path 62T included in the optical transmission line 52.
- j is an arbitrary integer from 1 to n and is an integer different from i.
- steps Sb8-1 and Sb8-2 may be performed in parallel, the processing may be performed in the order of steps Sb8-1 and Sb8-2, or the processing may be performed in the reverse order. good too.
- the optical transceivers 21aX-1 to 21aX-m included in the optical communication device 2aX and corresponding to the connection source address information of the connection request data 21aX-s is the transmission mode information received by the control unit 12b of the connection node device 1b from the operation device 4b and sent to the optical transmission line 51, and the received transmission mode information Optical signals are transmitted and received through the wavelength path of the center wavelength specified by and included in the optical transmission line 51 .
- the optical transmission/reception unit 21aY-i provided in the optical communication device 2bY-i transmits light through a wavelength route of the central wavelength specified by the transmission mode information received from the operation device 4b and included in the optical transmission line 52-i. Send and receive signals.
- the control unit 12b of the connection node device 1b transmits the transmission mode information to the optical communication device 2aX through the optical transmission line 51
- the output port switching unit 14a of the connection node device 1b switches the optical communication device 2aX through the switching process.
- the optical transmission/reception units 21aX-s and 21Y-i provided in the optical communication devices 2aX and 2bY-i are connected via wavelength paths designated by transmission modes included in the plurality of optical transmission paths 51 and 52-i.
- the optical path of the optimum transmission mode allows connection without human intervention. Therefore, it is possible to reduce the cost and time required for setting the optical path.
- connection information generator 38a of the connection node device 1b generates , the transmission line information of the optical transmission line 51 is calculated, but the following may also be performed.
- the transmission path information of each wavelength path included in the optical transmission path 51 is not different, and the transmission path information of each wavelength path included in the optical transmission path 51 is the same as the transmission path information of the optical transmission path 51. . Therefore, the connection information generator 38a stores the calculated transmission path information of the optical transmission path 51 in an internal storage area.
- connection information generation unit 38a may be generated by reading the transmission path information of the optical transmission path 51 stored in the internal storage area instead of calculating the transmission path information again.
- the optical input information is transmitted by the optical transmission/reception units 21aX-1 to 21aX-m to the connection node device 1b, and the connection node device 1b is transmitted to the operation device 4b.
- the optical input information is information that can be generated in advance if information about the optical transceivers 21aX-1 to 21aX-m, such as information such as the types of transceivers and the number of transceivers, is known. Therefore, the transmission line designing section 42b of the operation device 4b may store the optical input information generated by itself in an internal storage area in association with the address information.
- the transmission path designing unit 42b when calculating the transmission path characteristics, the transmission path designing unit 42b reads the optical input information corresponding to the connection source address information included in the connection request data stored in the internal storage area, and calculates the transmission path characteristics. will be calculated. Further, the digital signal processing units 23aX-1 to 23aX-m do not need to transmit the optical input information, and the connection information generated by the connection information generation unit 38a of the connection node device 1b does not include the optical input information. become.
- the optical transmission/reception units 21aX-1 to 21aX-m and the connection node device 1b are connected by one optical transmission line 51.
- the optical transmission/reception units 21aX-1 to 21aX-m may be configured as in the optical transmission system 102a shown in FIG. 13, which is connected to different optical transmission lines 51-1 and 51-2.
- an optical communication device 2dX and a connection node device 1b are connected to two optical transmission lines 51-1 and 51-2.
- the wavelength demultiplexers 6aX-1 and 6aX-2 provided in the optical communication device 2dX have the same configuration as the wavelength demultiplexer 6aX.
- the output port switching unit 14a of the connection node device 1b includes the optical fiber 51T-1 included in the optical transmission line 51-1, the wavelength separation unit 7a connected to the optical switch unit 15aT, and the optical transmission line 51-2.
- Two wavelength separators 7a are provided: the optical fiber 51T-2 included in the optical fiber 51T-2 and the wavelength separator 7a connected to the optical switch 15aT.
- the output port switching unit 14a includes an optical fiber 51R-1 included in the optical transmission line 51-1, a wavelength multiplexing unit 8a connected to the optical switch unit 15aR, and an optical fiber included in the optical transmission line 51-2. 51R-2 and the wavelength multiplexing unit 8a connected to the optical switch unit 15aR.
- the optical transmission/reception units 21aX-1 to 21aX-(mk) provided in the optical communication device 2dX are connected to the optical transmission line 51-1 via the wavelength demultiplexing/demultiplexing unit 6aX-1 to transmit and receive optical signals.
- the sections 21aX-(m ⁇ k+1) to 21aX-m are connected to the optical transmission line 51-2 via the wavelength demultiplexing section 6aX-2.
- k is an integer between 1 and (m-1).
- the optical transmission/reception units 21aX-1 to 21aX-m transmit the connection request data in order according to the timing indicated by the timing signal output by the transmission control unit 29X, and the optical transmission line 51- to which each is connected.
- the control units 71aX-1 to 71aX-m may output the transmission mode information to the control unit 20aX.
- the control unit 20aX takes in the transmission mode information output by one of the control units 71aX-1 to 71aX-m, it refers to the number of WDM wavelengths included in the taken transmission mode information.
- the control unit 20aX determines the number of the optical transmission/reception units 21aX-1 to 21aX-m already connected to the optical transmission/reception units 21aY-1 to 21aY-n provided in the optical communication devices 2bY-1 to 2bY-n.
- the optical transceivers 21aX-1 to 21aX-m provided with the controllers 71aX-1 to 71aX-m that output the transmission mode information are not allowed to perform optical signal communication.
- a communication stop instruction signal is output to the control units 71aX-1 to 71aX-m that are output sources of the transmission mode information. This makes it possible to prevent communication by optical signals exceeding the number of wavelengths that can be multiplexed by the wavelength multiplexing section 8aX provided in the wavelength demultiplexing section 6aX.
- the optical communication device 2dX transmits to the optical communication devices 2bY-1 to 2bY-n to which the optical transceivers 21aX-1 to 21aX-m are connected. A case where the optical signal does not reach is assumed. Even when the number of WDM wavelengths increases, by limiting the number of the optical transceivers 21aX-1 to 21aX-m that transmit optical signals according to the communication stop instruction signal, the transmitted optical signals can It is possible to prevent the communication devices 2bY-1 to 2bY-n from being unreachable.
- connection node devices 1, 1a and 1b send the transmission mode information to the optical transmission line 51 before the switching processing by the output port switching units 14 and 14a is performed. must be kept.
- the control units 12, 12a and 12b output the transmission mode information to the digital signal processing units 32 and 32a, and then the optical switch units 15R and 15R There is a time lag before 15aR outputs an optical signal containing transmission mode information.
- the control units 12, 12a, and 12b output the transmission mode information to the digital signal processing units 32 and 32a, and after the lapse of the pre-measured time, steps S7, Sa10, It is necessary to perform processing for outputting a switching instruction signal in Sb11.
- the controllers 71X, 71aX-1 to 71aX-m of the optical transceivers 21X, 21aX-1 to 21aX-m take in the transmission mode information
- the basic mode indicates that the transmission mode information has been received.
- Information is output to the digital signal processing units 23X, 23aX-1 to 23aX-m.
- the digital signal processing units 23X, 23aX-1 to 23aX-m transmit information indicating completion of reception of the transmission mode information to the connection node devices 1, 1a, 1b.
- the switching instruction signal may be output to the output port switching units 14 and 14a.
- steps S6-2, Sa9, and Sb10 when the optical modulators 26X, 26X-1 to 26X-m stop optical modulation in the fundamental mode, the digital signal processing units of the connection node devices 1, 1a, and 1b 32 and 32a perform optical modulation in the fundamental mode of the optical transceivers 21X and 21aX-1 to 21aX-m based on the presence or absence of optical signals in the fundamental mode transmitted by the optical transceivers 21X and 21aX-1 to 21aX-m. Detect when stopped.
- the digital signal processing units 32, 32a notify the control units 12, 12a, 12b that optical modulation in the fundamental mode of the optical transceivers 21X, 21aX-1 to 21aX-m, that is, optical output in the fundamental mode has stopped.
- the control units 12, 12a, 12b may output switching instruction signals to the output port switching units 14, 14a at the timing of receiving the notification.
- FIG. 14 is a block diagram showing the configuration of an optical transmission system 101b, which is another configuration example of the second embodiment.
- the optical transmission system 101b includes optical communication devices 2X-1 to 2X-m, a connection node device 1c, optical communication devices 2Y-1 to 2Y-n, an operation device 4, and optical communication devices 2X-1 to 2X-m.
- the connection node device 1c includes an edge function unit 11c and an output port switching unit 14.
- the output port switching unit 14 connects to the optical transmission lines 51-1 to 51-m, the connection information processing unit 13 of the edge function unit 11c, and the optical communication devices 2Y-1 to 2Y-n.
- the output port switching unit 14 sets the connection destination of the optical transmission lines 51-1 to 51-m to the connection information processing unit 13 of the edge function unit 11c.
- the output port switching unit 14 switches any one of the optical transmission lines 51-1 to 51-m according to the received switching instruction signal to the optical transmission line 52-1. to 52-n.
- the edge function unit 11c includes a connection information processing unit 13 and a control unit 12c.
- the control unit 12c has the following configuration in addition to the configuration of the control unit 12a of the second embodiment.
- Each of the devices 2X-1 to 2X-m includes one optical transceiver 21X-1 to 21X-m. Therefore, unlike the optical transmission system 102, the transmission control unit 29X cannot be used to transmit the connection request data at different timings.
- the control unit 12c determines the timing of transmitting the connection request data and the timing of transmitting the connection request data, and the optical transmitting/receiving units 21X-1 to 21X-m that permit transmission of the connection request data, so that the timing of transmitting the connection data can be set to different timings.
- Timing information including address information is output to the digital signal processing section 32 of the connection information processing section 13 . After that, the timing information is transmitted to the optical transmission/reception units 21X-1 to 21X-m by the same processing as when the transmission mode information is transmitted by the transmission data signal.
- Each of the optical communication devices 2X-1 to 2X-m has the same configuration as the optical communication device 2X of the first embodiment. will be added.
- the digital signal processing units 23X-1 to 23X-m provided in each of the optical communication devices 2X-1 to 2X-m are arranged so that the reception data signals output from the photodetectors 28X-1 to 28X-m contain timing information. If so, read the timing information.
- the digital signal processing units 23X-1 to 23X-m output the read timing information to the control units 71X-1 to 71X-m connected thereto.
- the control units 71X-1 to 71X-m are optical transmission/reception units 21X having their own internal storage areas that store the address information included in the timing information output by the digital signal processing units 23X-1 to 23X-m.
- the connection request data is output according to the timing indicated by the timing information.
- the timings at which the optical transmitter/receivers 21X-1 to 21X-m transmit the connection request data can be set to different timings.
- FIG. 15 is a block diagram showing the configuration of an optical transmission system 102b, which is another configuration example of the third embodiment.
- the optical transmission system 102b includes optical communication devices 2eX-1 to 2eX-m, a connection node device 1d, an optical communication device 2fY, an operation device 4c, a wavelength demultiplexer 6X, a wavelength demultiplexer 6Y, an optical transmission line 51, and optical transmission. 52, a connection line 3, and a connection line 3-1 that connects the operation device 4c and the optical communication device 2fY.
- the optical transmission line 51 connects the wavelength demultiplexing device 6X and the connection node device 1d.
- the optical transmission line 52 connects the wavelength demultiplexer 6Y and the connection node device 1d.
- the connection line 3 connects the operation device 4 and the connection node device 1d.
- the connection line 3-1 connects the operation device 4c and the optical communication device 2fY.
- Each of the optical communication devices 2eX-1 to 2eX-m includes optical transceivers 21aX-1 to 21aX-m and controllers 20X-1 to 20X-m.
- the optical communication device 2fY includes optical transceivers 21aY-1 to 21aY-n and a controller 20aY.
- the operation device 4c includes a route detection section 41 and a transmission line design section 42c.
- the transmission line designing section 42c has the same configuration as the transmission line designing section 42b of the third embodiment except for the configuration described below.
- the transmission line designing unit 42b refers to the connection line table stored in the internal storage area, and sets the transmission mode information to the connection lines 3-1 to 3- corresponding to the connection destination address information included in the connection request data. to the control units 20Y-1 to 20Y-n of the optical communication devices 2bY-1 to 2bY-n through the optical communication devices 2bY-1 to 2bY-n.
- the transmission line designing unit 42c attaches the connection destination address information included in the connection request data to the generated transmission mode information, and sends it to the control unit 20aY of the optical communication device 2fY through the connection line 3-1. Send.
- the transmission line designing unit 42c does not need to store the connection line table in advance in the internal storage area.
- the control unit 20aY receives the transmission mode information attached with the connection destination address information transmitted by the transmission line designing unit 42c through the connection line 3-1, the received transmission mode information , the transmission mode information is output to any one of the optical transmission/reception units 21aY-1 to 21aY-n corresponding to the connection destination address information given to the .
- the wavelength demultiplexers 6X and 6Y are the wavelength demultiplexer 6aX included in the optical transmission system 102 shown in FIG. 8aX, and the wavelength demultiplexer 6Y includes a wavelength demultiplexer 7aY and a wavelength multiplexer 8aY. Note that, like the optical communication device 2aX of the optical transmission system 102 shown in FIG. 8, the optical communication device 2fY has a configuration in which the wavelength multiplexing/demultiplexing device 6Y is provided as an internal functional unit, that is, the wavelength multiplexing/demultiplexing unit 6aY. may
- the connection node device 1d includes an edge function unit 11d and an output port switching unit 14a.
- the output port switching unit 14a connects the wavelength path 61-B of the fundamental wavelength included in the optical transmission line 51 to the connection information processing unit 13b of the edge function unit 11d, receives a switching instruction signal from the control unit 12d, and A switching process is performed to connect any one of the wavelength paths 61-1 to 61-m included in the transmission line 51 to any one of the wavelength paths 62-1 to 62-n included in the optical transmission line 52. .
- the edge function unit 11d includes a connection information processing unit 13b and a control unit 12d.
- the connection information processing unit 13b and the control unit 12d have the following configurations in addition to the configurations of the connection information processing unit 13a and the control unit 12b of the third embodiment.
- each of the plurality of optical communication devices 2eX-1 to 2eX-m includes one optical transceiver 21aX-1 to 21aX-m. ing. Therefore, unlike the optical transmission system 102 shown in FIG. 8, the transmission control unit 29X cannot be used to set different timings for transmitting the connection request data.
- connection information processing unit 13b and the control unit 12d assign different basic wavelengths to the optical transceivers 21aX-1 to 21aX-m in order to prevent collision of connection request data on the wavelength path 61-B of the basic wavelength. Equipped with a configuration for wavelength.
- the connection information processing unit 13b includes, instead of the single-wavelength light source 36, a wavelength-tunable light source having the same configuration as the wavelength-tunable light source 25aX-1 shown in FIG.
- the code "36a" is added and the wavelength tunable light source 36a is used.
- the digital signal processing unit 32a is connected to the wavelength tunable light source 36a and outputs a wavelength specifying signal to the wavelength tunable light source 36a.
- the control unit 12d assigns different basic wavelengths to each of the optical transmission/reception units 21aX-1 to 21aX-m. Therefore, the control unit 12d preliminarily selects a basic wavelength to be assigned to each of the optical transceivers 21aX-1 to 21aX-m, and selects each of the selected basic wavelengths and the corresponding optical transceivers 21aX-1 to 21aX-m. Address information of each of the optical transceivers 21aX-m is associated with each other and stored in advance in an internal storage area. The control unit 12d transmits basic wavelength designation information including the address information of each of the optical transceiver units 21aX-1 to 21aX-m stored in the internal storage area and the basic wavelength corresponding to each to the connection information processing unit.
- the basic wavelength designation information is optically transmitted/received by the same processing as when the transmission mode information is transmitted by the transmission data signal through the basic mode before the basic wavelength is changed, that is, the wavelength path 61-B of the optical transmission line 51. It is transmitted to the units 21aX-1 to 21aX-m.
- Each of the optical transmitter/receivers 21aX-1 to 21aX-m has the same configuration as the optical transmitter/receivers 21aX-1 to 21aX-m of the third embodiment. will be added.
- the digital signal processing units 23aX-1 to 23aX-m provided in each of the optical transmitting/receiving units 21aX-1 to 21aX-m include basic wavelength designation information in the received data signals output from the optical receivers 28X-1 to 28X-m. If so, read the basic wavelength specification information.
- the digital signal processing units 23aX-1 to 23aX-m output the read basic wavelength specifying information to the control units 71aX-1 to 71aX-m connected thereto.
- the control units 71aX-1 to 71aX-m take in the basic wavelength designation information output from the digital signal processing units 23aX-1 to 23aX-m, and process their own address information contained in the taken-in basic wavelength designation information, that is, internal reads out the fundamental wavelength corresponding to the address information stored in the storage area of .
- Each of the controllers 71aX-1 to 71aX-m outputs a wavelength designation signal designating the read fundamental wavelength to the corresponding wavelength tunable light sources 25aX-1 to 25aX-m.
- each of the optical transceivers 21aX-1 to 21aX-m generates optical signals with different fundamental wavelengths.
- the control unit 12d when transmitting the transmission mode information, the control unit 12d reads the basic wavelength corresponding to the connection source address information included in the transmission mode information from the internal storage area. The control unit 12d generates a wavelength designation signal based on the read information indicating the fundamental wavelength. The controller 12d outputs the generated wavelength designation signal to the wavelength variable light source 36a.
- the wavelength tunable light source 36a generates and outputs continuous light of a fundamental wavelength specified by a wavelength specifying signal. As a result, the basic wavelength of the continuous light generated by the wavelength tunable light source 36a is changed.
- the control unit 12d outputs transmission mode information to the digital signal processing unit 32a.
- the digital signal processing unit 32a takes in the transmission mode information output from the control unit 12d and generates a transmission data signal including the taken in transmission mode information.
- the digital signal processing unit 32 a outputs the generated transmission data signal to the optical modulator 37 .
- the optical modulator 37 generates an optical signal by modulating the continuous light of the changed basic wavelength, which is output from the wavelength tunable light source 36a, based on the transmission data signal.
- the optical transmitting/receiving units 21aX-1 to 21aX-m and the connection node device 1d are connected with different basic wavelengths, making it possible to avoid collision of connection request data.
- the connection request data may collide in the optical receiver 34 of the connection node device 1b. become.
- the connection node device 1d needs to individually terminate the wavelength paths of different basic wavelengths. For example, assume that the maximum number of basic wavelengths allocated by the connection node device 1d is predetermined.
- the optical receiver 33 of the connection information processing unit 13b of the connection node device 1d includes a plurality of optical receivers 34 whose number matches the maximum number of fundamental wavelengths.
- the optical switch section 15aT of the output port switching section 14a connects the output of the wavelength separation section 7a and the plurality of optical receivers 34 so as to connect to .
- the control unit 12d of the connection node device 1d can distinguish and acquire the connection request data transmitted by each of the optical transmission/reception units 21aX-1 to 21aX-m.
- the edge functioning section 11d may have a plurality of connection information processing sections 13b in a number that matches the maximum number of fundamental wavelengths. .
- initial setting information for avoiding collision of connection request data such as timing information or basic wavelength setting information is used for connection.
- the controllers 12c and 12d of the node devices 1c and 1d transmit to the optical transmitter/receivers 21X-1 to 21X-m and 21aX-1 to 21aX-m.
- a means for transmitting initial setting information for avoiding collision of these connection request data from the side of the connection node devices 1c and 1d is applied to, for example, the optical transmission system 102 shown in FIG. It may be used in combination with means for setting different timings for transmitting connection request data. By using these in combination, it is possible to more reliably avoid collision of connection request data.
- the control unit 12b of the connection node device 1b transmits the initial setting information including the information indicating the transmission timing of the connection request data to the transmission control unit 29X of the optical communication device 2aX in advance.
- the transmission control unit 29X transmits to the control unit 12b information indicating that the reception of the initial setting information has been completed.
- the control unit 29X may output a timing signal to each of the optical transmission/reception units 21aX-1 to 21aX-m based on the information indicating the transmission timing of the connection request data included in the initial setting information.
- a configuration for transmitting timing information included in the control unit 12c of the optical transmission system 101b shown in FIG. 14 is added to the control unit 12d of the optical transmission system 102b shown in FIG. 15, and the control unit 12d changes the fundamental wavelength. and the means for transmitting the timing signal may be used together, or either one of the means may be used.
- the following method may be applied. After each of the optical transceivers 21X-1 to 21X-m and 21aX-1 to 21aX-m transmits the connection request data, if there is no response from the connection node devices 1c and 1d for a predetermined period of time, for example, the destination is not obtained, the optical transceivers 21X-1 to 21X-m and 21aX-1 to 21aX-m are in the basic mode for a predetermined period of time or a randomly determined period of time. may be stopped. This makes it possible to reduce the probability of collision of connection request data.
- FIG. 16 is a block diagram showing the configuration of an optical transmission system 101c according to another configuration example of the second embodiment.
- the optical transmission system 101c includes a connection node device 1e, an optical communication device 2X, a plurality of optical communication devices 2bY-1 to 2bY-n, an operation device 4d, a wavelength demultiplexing device 6Y, an optical transmission line 51, an optical transmission line 52, a connection It has a line 3 and connection lines 3-1 to 3-n.
- the optical transmission line 51 connects the optical communication device 2X and the connection node device 1e.
- the optical transmission line 52 connects the wavelength demultiplexing device 6Y and the connection node device 1e.
- the connection line 3 connects the operation device 4d and the connection node device 1e.
- the connection lines 3-1 to 3-n connect the operation device 4d and each of the optical communication devices 2bY-1 to 2bY-n.
- the connection node device 1 e includes an edge function unit 11 e and an output port switching unit 14 .
- the edge function unit 11 e includes a control unit 12 e, a connection information processing unit 13 and a wavelength conversion unit 16 .
- the control unit 12e has the same configuration as the control unit 12a of the second embodiment, except for the configuration described below. That is, the control unit 12e receives information indicating that the connection node device 1e is equipped with the wavelength conversion unit 16 and information indicating the wavelength band that can be converted by the wavelength conversion unit 16 (hereinafter, these two pieces of information are collectively referred to as "wavelength conversion connection information"), the connection information output by the connection information processing section 13, and the connection request data are transmitted to the operation device 4d through the connection line 3.
- the control unit 12e outputs to the wavelength conversion unit 16 information on the central wavelength included in the transmission mode information transmitted by the transmission line designing unit 42d of the operation device 4d.
- the operation device 4d includes a route detection unit 41 and a transmission line design unit 42d.
- the transmission line designing section 42d has the same configuration as the transmission line designing section 42 of the second embodiment except for the configuration described below.
- the transmission line designing unit 42 stores transmission line information for each of the optical transmission lines 52-1 to 52-n in advance in an internal storage area, or stores the transmission line information for each of the optical transmission lines 52-1 to 52-n on demand. The transmission path information for each of n is acquired.
- the transmission line designing unit 42d stores the transmission line information of the optical transmission line 52 in advance in an internal storage area, or acquires the transmission line information of the optical transmission line 52 on demand.
- the transmission line design unit 42d determines the calculated transmission line characteristics, the information indicating the free resource of the optical transmission line 52 corresponding to the connection destination address information detected by the route detection unit 41, and the request contained in the connection request data. Based on the bit rate information, the specification information of the optical transceiver 21X, and the wavelength converter information, configuration information is selected by a predetermined selection process. The transmission path design unit 42d generates transmission mode information including the selected configuration information.
- step Sa1 the control unit 20X of the optical communication device 2X generates the connection request instruction signal including the address information of the optical transmission/reception unit 21aY-i included in the optical communication device 2bY-i as the address information of the connection destination. It is assumed that the optical communication device 2aY-i is connected to the connection line 3-i.
- step Sa3 the control unit 12e transmits the connection information, the connection request data, and the wavelength conversion unit information to the operation device 4d through the connection line 3.
- the path detection unit 41 of the operation device 4d detects identification information specifying the optical transmission path 52 corresponding to the address information of the optical transmission/reception unit 21aY-i based on the connection request data.
- the transmission line designing unit 42d takes in the identification information specifying the optical transmission line 52 output by the route detection unit 41 in the process of step Sa5.
- the transmission line designing unit 42d acquires the transmission line information of the optical transmission line 52 corresponding to the captured identification information specifying the optical transmission line 52 by reading from an internal storage area, or acquires the optical transmission line 52 on demand. Acquire the transmission path information of The transmission line designing unit 42d calculates transmission line characteristics based on the acquired transmission line information of the optical transmission line 52 and the received connection information.
- the transmission line designing unit 42d uses the calculated transmission line characteristics, the received wavelength conversion unit information, the desired bit rate information included in the received connection request data, and the specification information of the optical transmission/reception unit 21X. , the configuration information is selected by a predetermined selection process.
- the transmission path design unit 42d generates transmission mode information including the selected configuration information and the connection source address information included in the connection request data.
- the transmission line designing unit 42d refers to the connection line table stored in the internal storage area, and associates the generated transmission mode information with the connection destination address information included in the connection request data. is transmitted to the controller 20Y-i of the optical communication device 2bY-i through the connecting line 3-i.
- the same processing as that of step Sb9-1 shown in FIG. 10 is performed by the control unit 20Y-i and the optical transmission/reception unit 21aY-i.
- the wavelength tunable light source 25aY-i emits continuous light having the output optical power indicated in the transmission mode information, and the continuous light having the central wavelength indicated in the transmission mode information. is generated and output to the optical modulator 26Y-i.
- the optical modulator 26Y-i performs optical modulation according to the modulation method indicated by the transmission mode information.
- the digital signal processing unit 23aY-i generates a transmission data signal based on setting parameters such as the modulation method, baud rate, bit rate, FEC type, and signal band permitted to be used, which are indicated in the transmission mode information. It will be output to the modulator 26Y-i.
- step Sa7-2 the transmission line design unit 42d transmits the generated transmission mode information and the identification information identifying the optical transmission line 52 detected by the route detection unit 41 to the connection node device 1e through the connection line 3. Send.
- steps Sa8-2 and Sa9 is performed by the control unit 12e of the connection node device 1e, the connection information processing unit 13, the output port switching unit 14, and the optical transmission/reception unit 21X of the optical communication device 2X.
- the control unit 12e of the connection node device 1e outputs information indicating the center wavelength included in the transmission mode information received through the connection line 3 to the wavelength conversion unit 16.
- the control unit 12e acquires the address route correspondence table stored in the internal storage area or on demand. Identification information for specifying the optical transmission line 51 is detected from the address route correspondence table.
- the control unit 12e generates a switching instruction signal based on the identification information specifying the detected optical transmission line 51 and the identification information specifying the optical transmission line 52 received from the transmission line designing unit 42d of the operation device 4d.
- the control unit 12 e outputs the generated switching instruction signal to the output port switching unit 14 .
- the output port switching unit 14 connects the optical transmission line 51 and the wavelength conversion unit 16 .
- the output port switching unit 14 of the connection node device 1e converts the optical signal received through the optical transmission line 51 into wavelength Output to the conversion unit 16 .
- the wavelength conversion section 16 takes in the optical signal output by the output port switching section 14 .
- the wavelength conversion unit 16 converts the wavelength of the received optical signal into the center wavelength given from the control unit 12 e and sends it out to the optical transmission line 52 .
- the central wavelength given from the controller 12e is the central wavelength indicated in the transmission mode information.
- the wavelength of the optical signal sent to the optical transmission line 52 by the wavelength converter 16 is the same as the wavelength of the optical signal sent by the optical transmitter/receiver 21aY-1 of the optical communication device 2bY-i. Therefore, assuming that the wavelength path of the center wavelength indicated in the transmission mode information is the wavelength path 62-i, the wavelength converter 16 and the optical transmitter/receiver 21aY-i are connected by the wavelength path 62-i. .
- the optical signal sent to the optical transmission line 52 by the wavelength converter 16 is transmitted to the wavelength demultiplexer 7aY provided in the wavelength demultiplexer 6Y through the wavelength path 62-i.
- the wavelength demultiplexer 7aY demultiplexes the wavelength-multiplexed optical signal transmitted through the optical transmission line 52 for each wavelength.
- the wavelength separation unit 7aY outputs each of the demultiplexed optical signals to the optical transmission/reception units 21aY-1 to 21aY-n corresponding to each wavelength.
- the optical signal transmitted by the optical transmitter/receiver 21X of the optical communication device 2X reaches the optical transmitter/receiver 21aY-i of the optical communication device 2bY-i.
- the edge function unit 11e of the connection node device 1e includes the wavelength conversion unit 16, so that the optical transmission/reception unit 21X of the optical communication device 2X is a single wavelength light source 25X, which is a light source whose wavelength cannot be changed. can be converted into an arbitrary wavelength by the wavelength converter 16. Therefore, by using the connection node device 1e, the wavelength is switched using the optical transmitter/receiver 21X, which is lower in cost than the optical transmitter/receiver 21aX-1 including the wavelength tunable light source 25aX-1, and the wavelength is included in the optical transmission line 52. Any of the wavelength paths 62-1 to 62-n can be used to connect to any of the optical transceivers 21aY-1 to 21aY-n.
- the optical communication device 2aX does not include the wavelength demultiplexing unit 6aX, and each of the optical transmitting/receiving units 21aX-1 to 21aX-m performs one optical transmission.
- One end of the optical transmission lines 51-1 to 51-m are connected, and the other ends of the optical transmission lines 51-1 to 51-m are connected to the output port switching unit 14a. You may do so.
- the optical communication device 2fY shown in FIG. 15 and the wavelength multiplexing/demultiplexing device connected to the optical communication device 2fY 6Y, and the wavelength multiplexing/demultiplexing device 6Y may be connected to the optical transmission line 52-1.
- the optical communication devices 2bY-1 to 2bY-n shown in FIG. 1 to 2bY-n, and the wavelength multiplexing/demultiplexing device 6Y may be connected to the optical transmission line 52-1.
- the optical transmission system 102a shown in FIG. 13 instead of the optical communication device 2bY-1 connected to the optical transmission path 52-1, the optical communication devices 2bY-1 to 2bY-n shown in FIG. 1 to 2bY-n, and the wavelength multiplexing/demultiplexing device 6Y may be connected to the optical transmission line 52-1.
- an optical communication device 2fY shown in FIG. 15 is provided instead of the optical communication devices 2bY-1 to 2bY-n. , may be connected to one optical transmitter/receiver unit 21aY-1 to 21aY-n.
- the optical transmission system 102a shown in FIG. 13 instead of the optical communication device 2dX, two optical communication devices 2aX shown in FIG.
- the demultiplexing unit 6aX may be connected, and the wavelength demultiplexing unit 6aX of the other optical communication device 2aX may be connected to the optical transmission line 51-2.
- the optical transceivers 21X-1 to 21X-m are connected to each of the optical transceivers 21X-1 to 21X-m. and a transmission control unit 29X connected to each of the optical transmission/reception units 21X-1 to 21X-m. Each of them may be connected to one optical transmission/reception unit 21X-1 to 21X-m.
- an optical communication device 2cY shown in FIG. 7 is provided instead of the optical communication devices 2Y-1 to 2Y-n.
- One optical transmitter/receiver unit 21Y-1 to 21Y-n may be connected.
- optical transmission system 101c shown in FIG. 16 instead of the optical communication device 2X, optical communication devices 2X-1 to 2X-m shown in FIG. 51, a plurality of optical transmission lines 51-1 to 51-m are connected, and one optical transmission/reception unit 21X-1 to 21X- is provided for each of the optical transmission lines 51-1 to 51-m. m may be connected.
- optical transceivers 21X-1 to 21X-m and optical transceivers 21X-1 to 21X-m are connected respectively.
- One optical communication device including one control unit 20aX and a transmission control unit 29X connected to each of the optical transmission/reception units 21X-1 to 21X-m, each of the optical transmission/reception units 21X-1 to 21X-m and an output Optical transmission lines 51-1 to 51-m connected to the port switching unit 14 may be provided.
- the optical communication device 2aX does not internally include the wavelength demultiplexer 6aX, but externally as the wavelength demultiplexer 6X as in the optical transmission system 102b of FIG. can be Similarly, in the optical transmission system 102a shown in FIG. 13, the optical communication device 2dX does not internally include the wavelength demultiplexing units 6aX-1 and 6aX-1. They may be provided externally as demultiplexers 6X-1 and 6X-2.
- optical transmitter/receiver having the same configuration as the optical transmitter/receiver 21X including the single wavelength light source 25X shown in FIG. 2 may be applied.
- transmission path characteristics, desired bit rate information, and specification information of the optical transceivers 21X, 21X-1 to 21X-m, 21aX, 21aX-1 to 21aX-m are selected.
- Select configuration information for each selected pattern, and combine transmission path characteristics, desired bit rate information, and specification information of optical transceivers 21X, 21X-1 to 21X-m, 21aX, 21aX-1 to 21aX-m A transmission mode information table associated with configuration information selected for each transmission mode is generated in advance and stored in advance in storage areas inside the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, and 42d.
- control unit 12 and the transmission line design units 42, 42a, 42b, 42c, and 42d refer to the transmission mode information table stored in the internal storage area instead of the process of selecting configuration information. Then, a combination of configuration information corresponding to the combination of transmission line characteristics, desired bit rate information, and specification information of the optical transceivers 21X, 21X-1 to 21X-m, 21aX, 21aX-1 to 21aX-m is transmitted. It is also possible to read from the mode information table and generate transmission mode information including a combination of the read configuration information and the connection source address information included in the connection request data.
- transmission mode number a different number (hereinafter referred to as "transmission mode number”) is assigned to each record of the transmission mode information table, and stored in the internal storage areas of the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, 42d.
- a transmission mode information table to which the transmission mode number is assigned is also stored in advance in a storage area inside the .
- the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, and 42d refer to the transmission mode information table stored in the internal storage area to obtain the transmission line characteristics, the desired bit rate information, and the optical transmission/reception unit 21X. , 21X-1 to 21X-m, 21aX, and 21aX-1 to 21aX-m.
- the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, and 42d generate transmission mode information including the detected transmission mode number and the connection source address information included in the connection request data.
- the transmission mode information table in the internal storage area is referred to, and the transmission mode information included in the captured transmission mode information is retrieved.
- control units 12b, 12d and the control units 71X, 71X-1 to 71X-m, 71aX, 71aX-1 to 71aX-m, 71Y, 71Y-1 to 71Y-n, 71aY, 71aY-1 to 71aYn may be notified of the specified transmission mode using the transmission mode number.
- the transmission line design units 42, 42a, 42b, 42c, and 42d are connected node devices 1a, 1b, 1c, 1d, and 1e. and the transmission line information of the optical transmission lines 52, 52-i corresponding to the connection destination address information included in the connection request data, end-to-end, that is, connection from the connection source
- the transmission path characteristics between the destinations are calculated.
- the following configuration may be used.
- Control units 12a, 12b, 12c, 12d, and 12e of connection node devices 1a, 1b, 1c, 1d, and 1e calculate transmission line characteristics based on connection information of optical transmission lines 51, 51-1 to 51-m. , the calculated transmission path characteristics are replaced with connection information and transmitted to the operation devices 4, 4a, 4b, 4c, and 4d.
- Transmission line design units 42, 42a, 42b, 42c, and 42d of operation devices 4, 4a, 4b, 4c, and 4d store transmission line information of optical transmission lines 52, 52-1 to 52-n stored in internal storage areas.
- the optical transmission lines 52, 52- corresponding to the connection destination address information included in the connection request data.
- the transmission line design units 42, 42a, 42b, 42c, and 42d calculate based on the transmission line characteristics received from the control units 12a, 12b, 12c, 12d, and 12e and the transmission line information of the optical transmission lines 52 and 52-i. It is also possible to calculate an approximate end-to-end transmission path characteristic based on the obtained transmission path characteristics.
- the transmission line design units 42, 42a, 42b, 42c, and 42d design the optical transmission lines 52, 52-1 to 52-n based on the transmission line information of the optical transmission lines 52, 52-1 to 52-n. Instead of calculating the transmission path characteristics, the following configuration may be used.
- the transmission line designing units 42, 42a, 42b, 42c, and 42d preliminarily determine transmission of the optical transmission lines 52, 52-1 to 52-n based on the transmission line information of the optical transmission lines 52, 52-1 to 52-n.
- the path characteristics are calculated, and the calculated transmission path characteristics of the optical transmission lines 52, 52-1 to 52-n are stored in advance in an internal storage area.
- the transmission line design units 42, 42a, 42b, 42c, and 42d replace the process of calculating the transmission line characteristics of the optical transmission lines 52, 52-1 to 52-n with It is possible to acquire the transmission line characteristics of the optical transmission lines 52, 52-1 to 52-n by reading out the transmission line characteristics of the optical transmission lines 52, 52-1 to 52-n from the storage area of become.
- the output port switching section 14 includes two optical switching sections 15T and 15R, and the output port switching section 14a includes two optical switches 15T and 15R. It has two optical switch units 15aT and 15aR.
- the output port switching units 14 and 14a are provided with one optical switch unit, and the ports for the transmission direction and the ports for the reception direction are separated by port setting in the one optical switch unit. configuration.
- the output port switching unit 14a described above for example, WSS, FiberPatchPanel, etc. are applied.
- an AWG Arrayed Waveguide Grating
- AWG is applied to the output port switching unit 14a of the optical transmission system 102b shown in FIG. It is predetermined to output to the transmission line 52 .
- the control unit 12d transmits information indicating that the connection node device 1d is provided with an AWG as the output port switching unit 14a and information indicating a wavelength route set in advance in the AWG to the operation device 4c together with connection information and the like.
- the transmission path designing unit 42c of the operation device 4c generates transmission mode information by adding the information indicating the presence of the AWG received from the control unit 12d and the information indicating the wavelength path set in advance in the AWG.
- the optical transmitting/receiving units 21aX-1 to 21aX-m can switch the wavelengths of the wavelength tunable light sources 25aX-1 to 25aX-m provided therein according to the transmission mode information. is changed, it is possible to switch from the connection to the connection node device 1d to the optical transmission line 52. Therefore, the control section 12d does not need to output the switching instruction signal to the output port switching section 14a.
- FIG. 17 is a block diagram showing the configuration of the optical transmission system 103 according to the fourth embodiment.
- the optical transmission system 103 connects the optical communication devices 2bX and 2bY, the connection node devices 1fX and 1fY, the operation device 4e, the optical transmission/reception unit 21aX of the optical communication device 2bX, and the output port switching unit 14aX of the connection node device 1fX.
- optical transmission line 53 connecting the optical transmission/reception unit 21aY of the optical communication device 2bY and the output port switching unit 14aY of the connection node device 1fY; the output port switching unit 14aX of the connection node device 1fX; and the output port of the connection node device 1fY.
- An optical transmission line 52 connecting the switching unit 14aY, a connection line 3X connecting the connection node device 1fX and the operation device 4e, and a connection line 3Y connecting the connection node device 1fY and the operation device 4e are provided.
- the optical transmission line 52 is, for example, an optical transmission line that constitutes a carrier network owned by a telecommunications carrier, and the optical transmission lines 51 and 53 are, for example, dark fibers.
- the optical communication devices 2bX and 2bY are, for example, communication devices used by users.
- the optical transmitter/receivers 21aX and 21aY included in the optical communication devices 2bX and 2bY have the same configuration as the optical transmitter/receiver 21aX-1 of the optical transmission system 102 shown in FIG.
- the code branch number "X-1" of each functional unit provided in the optical transceiver 21aX-1 is changed to "X" and "Y", respectively. It shall be replaced and shown.
- the output port switching units 14aX and 14aY provided in the connection node devices 1fX and 1fY have the same configuration as the output port switching unit 14a of the connection node device 1b of the optical transmission system 102 shown in FIG.
- the symbol "a" of each functional unit included in the output port switching unit 14a is replaced with "aX” and "aY” respectively. do.
- connection information processing units 13aX and 13aY have the same configuration as the connection information processing unit 13a of the connection node device 1b of the optical transmission system 102 shown in FIG.
- the branch number “a” of each function unit provided in the connection information processing unit 13a is replaced with “aX” and “aY” respectively. shall be shown.
- control unit 12fY pre-stores identification information specifying the connection node device 1fY in an internal storage area.
- the control unit 12fY adds identification information for specifying the connection node device 1fY stored in the internal storage area and transmits the data to the operation device 4e.
- the operation device 4e includes a route detection unit 41 and a transmission line design unit 42e.
- the transmission line designing unit 42e stores in advance the transmission line information of the optical transmission line 52 in association with the identification information specifying the optical transmission line 52 in an internal storage area.
- the transmission line designing unit 42e preliminarily calculates the transmission line information of the optical transmission line 52 based on the optical signal transmitted by the optical transmission line 52 by a predetermined calculation, and stores the information in an internal storage area. Alternatively, it may be acquired from an external device on demand at a specific timing such as when a network is laid. Also, the transmission line information of the optical transmission line 52 may be obtained in advance by a method other than the predetermined calculation.
- the transmission line designing unit 42e stores information indicating free resources of the optical transmission line 52 in advance in an internal storage area.
- information indicating available resources is, for example, information indicating wavelengths, wavelength bands, or optical transmission paths that are not used for communication when judging resource availability. It is assumed that the information indicating empty resources stored in the internal storage area of the transmission line designing section 42e is updated by the transmission line designing section 42e each time a communication path is established.
- the transmission line designing unit 42e associates the identification information specifying the connection node device 1fX with the connection line 3X, and associates the information specifying the connection node device 1fY with the connection line 3Y in the internal storage area.
- a connection line table is stored in advance.
- the transmission line design unit 42e stores the connection state table 43 shown in FIG. 18 in its internal storage area.
- the record format of the connection status table 43 has items of "request source address information", “connection destination address information”, “connection node device”, "connection destination optical transmission line”, and "received data".
- the connection source address information included in the connection request data is written in the item "request source address information”.
- the connection destination address information included in the connection request data is written in the “connection destination address information” item.
- connection node device identification information specifying the connection node devices 1fX and 1fY received by the transmission line design unit 42e together with the connection request data is written.
- Identification information for specifying the optical transmission line 52 corresponding to the connection destination address information included in the connection request data detected by the path detection unit 41 is written in the item “connection destination optical transmission line”.
- the connection information and the connection request data received by the transmission line designing unit 42e are written in the item of "received data".
- the transmission line designing unit 42e In order to connect the optical transmitter/receiver 21aX and the optical transmitter/receiver 21aY, the transmission line designing unit 42e refers to the connection state table 43, and transfers from the optical transmission line 51 to the optical transmission line 53 via the optical transmission line 52. Calculate the transmission line characteristics of the optical transmission line.
- the transmission path designing unit 42e identifies transmission modes to be applied to the optical transmission units 24aX and 24aY based on the calculated transmission path characteristics.
- FIG. 19 is a flow chart showing the flow of processing by the optical transmission system 103 of the fourth embodiment.
- the output port switching unit 14aX of the connection node device 1fX connects the wavelength path of the fundamental wavelength of the optical transmission line 51 to the connection information processing unit 13aX of the edge function unit 11fX of the connection node device 1fX.
- the output port switching unit 14aY of the connection node device 1fY connects the wavelength path of the fundamental wavelength of the optical transmission line 53 to the connection information processing unit 13aY of the edge function unit 11fY of the connection node device 1fY.
- the optical transmitter/receiver 21aX included in the optical communication device 2bX is connected to the optical transmitter/receiver 21aY of the optical communication device 2bY, and the optical transmitter/receiver 21aY included in the optical communication device 2bY is connected to the optical transmitter/receiver 21aX of the optical communication device 2bX.
- a connection destination will be described as a connection destination.
- the control unit 20X of the optical communication device 2bX generates a connection request instruction signal including the address information of the optical transmission/reception unit 21aY and the desired bit rate in order to connect to the optical transmission/reception unit 21aY provided in the optical communication device 2bY. do.
- the controller 20X outputs the generated connection request instruction signal to the controller 71aX of the optical transceiver 21aX.
- the control unit 71aX receives the connection request signal output by the control unit 20X, and uses the address information of the optical transmission/reception unit 21aY included in the received connection request signal as the connection destination address.
- the control unit 71aX uses the address information of the optical transmission/reception unit 21aX stored in the internal storage area as connection source address information.
- the control unit 71aX generates connection request data including connection destination address information, connection source address information, desired bit rate included in the connection request instruction signal, and specification information of the optical transmission/reception unit 21aX stored in an internal storage area. to generate Thereafter, the same processing as step Sb2 in FIG. 10 is performed by the optical transmitter/receiver 21aX of the optical communication device 2bX (step Sc1-1).
- the control unit 20Y of the optical communication device 2bY generates a connection request instruction signal including the address information of the optical transmission/reception unit 21aX and the desired bit rate in order to connect to the optical transmission/reception unit 21aX included in the optical communication device 2bX. do.
- the controller 20Y outputs the generated connection request instruction signal to the controller 71aY of the optical transceiver 21aY.
- the control unit 71aY takes in the connection request signal output by the control unit 20Y, and uses the address information of the optical transmission/reception unit 21aX included in the taken in connection request signal as the connection destination address.
- the control unit 71aY uses the address information of the optical transmission/reception unit 21aY stored in the internal storage area as the connection source address information.
- the control unit 71aY generates connection request data including connection destination address information, connection source address information, desired bit rate included in the connection request instruction signal, and specification information of the optical transmission/reception unit 21aY stored in an internal storage area. to generate Thereafter, the same process as step Sb2 in FIG. 10 is performed by the optical transmitter/receiver 21aY of the optical communication device 2bY (step Sc1-2).
- step Sc2-1 the same processing as step Sb3 in FIG. 10 is performed in the output port switching unit 14aX and the connection information processing unit 13aX of the connection node device 1fX.
- the transmission line information calculated by the connection information generation unit 38aX of the connection node device 1fX is the transmission line information of the optical transmission line 51, and the connection information generation unit 38aX generates the connection information of the optical transmission line 51.
- step Sc2-2 the same processing as in step Sb3 of FIG. 10 is performed by the output port switching unit 14aY and the connection information processing unit 13aY of the connection node device 1fY.
- the transmission line information calculated by the connection information generation unit 38aY of the connection node device 1fY is the transmission line information of the optical transmission line 53, and the connection information generation unit 38aY generates the connection information of the optical transmission line 53.
- the control unit 12fX takes in the connection information of the optical transmission line 51 output by the connection information generation unit 38aX and the connection request data.
- the control unit 12fX transmits the fetched connection information of the optical transmission line 51, the fetched connection request data, and the identification information specifying the connection node device 1fX stored in the internal storage area to the operation device 4e through the connection line 3X. (step Sc3-1).
- the control unit 12fY takes in the connection information of the optical transmission line 53 and the connection request data output by the connection information generation unit 38aY.
- the control unit 12fY transmits the fetched connection information of the optical transmission line 53, the fetched connection request data, and the identification information specifying the connection node device 1fY stored in the internal storage area to the operation device 4e through the connection line 3Y. (step Sc3-2).
- the operation device 4e performs transmission mode identification processing (step Sc4).
- FIG. 20 is a flow chart showing the flow of a subroutine for transmission mode identification processing. After the process of step Sc3-1, the operation device 4e transmits the connection information of the optical transmission line 51, the connection request data, and the identification information specifying the connection node device 1fX, which are transmitted by the control unit 12fX of the connection node device 1fX. will be described.
- the route detection unit 41 of the operation device 4e receives the connection request data transmitted by the control unit 12fX of the connection node device 1fX and the identification information specifying the connection node device 1fX.
- the route detection unit 41 refers to a route information table stored in an internal storage area or a route information table acquired on demand, and obtains connection destination address information included in the received connection request data. Identification information for specifying the optical transmission line 52 corresponding to the address information of the optical transmitter/receiver 21aY is detected.
- the path detection unit 41 outputs identification information identifying the detected optical transmission line 52 and identification information identifying the received connection node device 1fX to the transmission line designing unit 42e.
- the transmission line designing unit 42e receives the connection information of the optical transmission line 51, the connection request data, and the identification information specifying the connection node device 1fX, which are transmitted by the control unit 12fX of the connection node device 1fX.
- the transmission line designing unit 42e takes in the identification information for identifying the optical transmission line 52 output by the path detection unit 41 and the identification information for identifying the connection node device 1fX.
- the combination of the identification information that identifies the optical transmission line 52 and the identification information that identifies the connection node device 1fX, which the design unit 42e has acquired as the output of the path detection unit 41, is the identification information that identifies the connection node device 1fX.
- the transmission line designing unit 42e identifies the connection information of the optical transmission line 51, the connection request data, the identification information that identifies the optical transmission line 52, and the connection node device 1fX, assuming that these combinations are in correspondence. Based on the identification information to be used, the following processing is performed.
- the transmission line design unit 42e creates one new record in the connection state table 43 stored in the internal storage area.
- the transmission path design unit 42e writes the connection source address information included in the received connection request data, here, the address information of the optical transmission/reception unit 21aX, in the item of "request source address information" of the generated record.
- the transmission path design unit 42e writes the connection destination address information included in the received connection request data, here, the address information of the optical transmission/reception unit 21aY, in the item of "connection destination address information" of the record.
- the transmission line design unit 42e writes identification information identifying the received connection node device 1fX in the "connection node device" item of the record.
- the transmission line designing unit 42e writes the identification information for specifying the optical transmission line 52 taken in as the output of the route detection unit 41 in the item of "connection destination optical transmission line” of the record.
- the transmission line designing unit 42e writes the received connection information of the optical transmission line 51 and the connection request data in the item of "received data" of the record.
- step Sd1 when the process of step Sd1 that is executed as a result of the process of step Sc3-1 in FIG. 19 is completed before the process of step Sd1 that is executed as a result of the process of step Sc3-2.
- the connection state table 43 of the transmission line designing unit 42e when the process of step Sd1 executed as a result of the process of step Sc3-1 is completed, the connection state table 43 of the transmission line designing unit 42e generates a record regarding the optical transmission/reception unit 21aY of the optical communication device 2bY. It turns out that it is not.
- step Sc3 At the time when the process of step Sd1 executed due to the process of -1 is completed, the record regarding the optical transmitter/receiver 21aY of the optical communication device 2bY is generated in the connection state table 43 of the transmission path designing unit 42e. become.
- the transmission line designing unit 42e In order to determine which of these states the transmission line designing unit 42e is in, the transmission line designing unit 42e refers to the connection state table 43, and determines whether the optical transmitting/receiving unit written in the item of “connection destination address information” of the newly generated record.
- 21aY determines whether or not there is a record in which the address information of 21aY is written in the item of "request source address information", and adds "1" to the counter value of the number of times of processing provided in the internal storage area. . However, the initial value of the processing number counter is "0" (step Sd2).
- the transmission line designing unit 42e determines that the address information of the optical transmitting/receiving unit 21aY written in the item of "connection destination address information" of the newly generated record is written in the item of "request source address information". Suppose that it is determined that it does not exist (step Sd2, No). In this case, the processing of step Sd1 that is executed as a result of step Sc3-2 is not completed. Therefore, the transmission line designing unit 42e waits for a predetermined time until a record relating to the optical transmitting/receiving unit 21aY of the optical communication device 2bY is generated in the connection state table 43 (step Sd3).
- the transmission line designing unit 42e determines that the address information of the optical transmitting/receiving unit 21aY written in the item of "connection destination address information" of the newly generated record is written in the item of "request source address information". If it is determined that it exists (step Sd2, Yes), it is determined whether or not the value of the counter of the number of times of processing stored in the internal storage area is "2" or more (step Sd4).
- the reasons for performing the determination process in step Sc4 are the transmission mode specification process in step Sc4 regarding the optical transceiver 21aX of the optical communication device 2bX performed after the process in step Sc3-1, and the optical transmission mode specification process performed after the process in step Sc3-2. This is because one transmission mode identification process is stopped so that the transmission mode identification process of step Sc4 regarding the optical transceiver 21aY of the communication device 2bY is not executed in parallel. If the value of the counter of the number of processing times is "1", the determination processing of step Sd2 has been performed only once, and at the time of the determination processing, the connection state table 43 already has the value of the preceding transmission mode specifying processing. This means that a record has been generated by the processing of step Sd1. Therefore, in this case, the preceding transmission mode identification process is preferentially performed, and the subsequent transmission mode identification process is stopped.
- step Sd4, No When the transmission line designing unit 42e determines that the value of the processing count counter stored in the internal storage area is not equal to or greater than "2" (step Sd4, No), the process ends. On the other hand, when the transmission line designing unit 42e determines that the value of the processing count counter stored in the internal storage area is equal to or greater than "2" (step Sd4, Yes), it performs the following determination processing.
- the transmission line designing unit 42e selects two records to be connected stored in the connection state table 43, that is, a record in which the address information of the optical transmitting/receiving unit 21aX is written in the item of "request source address information" and It is determined whether or not the address information of the optical transmitter/receiver 21aY written in the "connection destination address information" item satisfies the connection condition in the record written in the "request source address information” item ( Step Sd5).
- the connection conditions are, for example, the address information written in one of the two records to be connected stored in the connection status table 43, the “request source address information” item, and the other “connection destination address information” item.
- the address information written in the item of "Information” and the content of the item of "connection destination optical transmission line" must match.
- the address information of the optical transmitter/receiver 21aY is written in the "connection destination address information" item of the record whose "request source address information” item is the address information of the optical transmitter/receiver 21aX. Further, the address information of the optical transmitter/receiver 21aX is written in the "connection destination address information" item of the record whose "request source address information” item is the address information of the optical transmitter/receiver 21aY. Therefore, the first connection condition that the address information written in one item of "request source address information" matches the address information written in the other item of "connection destination address information" is satisfied. ing.
- Identification information for specifying the optical transmission line 52 is written in the "connection destination optical transmission line" item of the record whose "request source address information” item is the address information of the optical transmitting/receiving unit 21aX.
- Identification information for specifying the optical transmission line 52 is written in the item of "connection destination optical transmission line” of the record whose "information" is the address information of the optical transmission/reception unit 21aY. Therefore, the second connection condition that the content of the item "connection destination optical transmission line" matches is also satisfied.
- the transmission line design unit 42e determines that the connection condition is satisfied (step Sd5, Yes).
- the transmission line designing unit 42e reads the connection information of the optical transmission line 51 from the item of "received data" of the record whose "request source address information” is the address information of the optical transmission/reception unit 21aX.
- the transmission line designing unit 42e reads the connection information of the optical transmission line 53 from the item of "received data" of the record whose "request source address information” is the address information of the optical transmission/reception unit 21aY.
- the transmission line designing unit 42e reads and acquires the transmission line information of the optical transmission line 52 from an internal storage area, or acquires the transmission line information of the optical transmission line 52 on demand. Based on the read connection information of the optical transmission line 51 and the connection information of the optical transmission line 53, and the acquired transmission line information of the optical transmission line 52, the transmission line design unit 42e, for example, transmits GNPy or the like provided inside. A design tool is used to calculate transmission path characteristics (step Sd6).
- the transmission line designing unit 42e stores the calculated transmission line characteristics, information indicating an empty resource of the optical transmission line 52 corresponding to the connection destination address information detected by the route detection unit 41 stored in the internal storage area, and the "request A connection in which the item "source address information” is written in the item “received data" of the record in which the item “source address information” is the address information of the optical transceiver 21aX and the record in which the item “source address information” is the address information of the optical transceiver 21aY
- the configuration information is selected by a predetermined selection process based on the desired bit rate information and the specification information of the optical transceivers 21aX and 21aY included in the request data.
- the transmission line design unit 42e generates transmission mode information including the selected configuration information and the connection source address information included in the connection request data (step Sd7), and returns to the processing of the flowchart shown in FIG.
- step Sd5 determines that the connection condition is not satisfied (step Sd5, No)
- the transmission line designing unit 42e refers to the connection line table stored in the internal storage area, and transfers the generated transmission mode information and the identification information identifying the optical transmission line 52 detected by the path detection unit 41 to the connection line 3X. to the controller 12fX of the connection node device 1fX (step Sc5-1).
- the transmission line designing unit 42e refers to the connection line table stored in the internal storage area, and transmits the generated transmission mode information and the identification information identifying the optical transmission line 52 detected by the path detection unit 41 through the connection line 3Y. It is transmitted to the control unit 12fY of the connection node device 1fY (step Sc5-2). Note that the order of processing steps Sc5-1 and Sc5-2 may be performed in parallel, the processing may be performed in the order of steps Sc5-1 and Sc5-2, or the processing may be performed in the reverse order. good too.
- connection node device 1fX the same processing as step Sb9-2 in FIG. 10 is performed in the edge function unit 11fX and the output port switching unit 14aX (step Sc6-1), This is performed in the optical transmitter/receiver 21aX of the optical communication device 2bX (step Sc7-1).
- step Sb9-2 in FIG. 10 the same processing as step Sb9-2 in FIG. 10 is performed in the edge function unit 11fY and the output port switching unit 14aY (step Sc6-2), and the same processing as step Sb10 is performed in optical communication. This is performed in the optical transmitter/receiver 21aY of the device 2bY (step Sc7-2).
- the control unit 12fX of the connection node device 1fX performs the same process as step Sb11 in FIG. A switching process is performed to connect the designated wavelength path of the center wavelength and the wavelength path of the center wavelength of the optical transmission line 51 designated in the transmission mode information (step Sc8-1).
- the control unit 12fY of the connection node device 1fY performs the same processing as in step Sb11 of FIG. A switching process is performed to connect the designated wavelength route of the center wavelength to the wavelength route of the center wavelength of the optical transmission line 53 designated by the transmission mode information (step Sc8-2).
- the optical transmitter/receiver 21aX and the optical transmitter/receiver 21aY are wavelength paths included in each of the optical transmission line 51, the optical transmission line 52, and the optical transmission line 53, and the center wavelength specified in the transmission mode information. will be connected by the wavelength path of
- Steps Sc8-1 and Sc8-2 the method of performing the processing of Steps Sc8-1 and Sc8-2 after the above-described pre-measured time has passed, and the reception of the transmission mode information is completed. Either of the method of performing the processing of steps Sc8-1 and Sc8-2 at the timing of receiving the information indicating that the method may be applied.
- the configuration of the transmission mode information table described above may be applied, and the transmission mode specified by the transmission mode number is transmitted to the optical transmission/reception units 21aX and 21aY and the control units 12fX and 12fY of the connection node devices 1fX and 1fY. You may make it apply the structure which notifies to.
- the operation device 4e is connected to the connection node device 1fX and the connection node device 1fY, and is a second optical transmission line pre-stored in an internal storage area.
- the transmission line information of the transmission line 52 is acquired by reading from an internal storage area, or the transmission line information of the optical transmission line 52 is acquired on demand, and the acquired transmission line information of the optical transmission line 52 and the connection node
- the connection information processing unit 13aX of the device 1fX connects the optical transmission line 51, which is the first optical transmission line, acquired from the optical signal transmitted by the optical transmission/reception unit 21aX included in the optical communication device 2bX, which is the first optical communication device.
- the transmission mode is specified based on the request data, and transmission mode information indicating the specified transmission mode is transmitted to the control unit 12fX of the connection node device 1fX and the control unit 12fY of the connection node device 1fY.
- the output port switching unit 14aX of the connection node device 1fX performs switching processing after the control unit 12fX transmits the transmission mode information to the optical transmission/reception unit 21aX through the optical transmission line 51, and the output port switching unit 14aY of the connection node device 1fY After the control unit 12fY transmits the transmission mode information to the optical transmission/reception unit 21aY of the optical communication device 2bY through the optical transmission line 53, switching processing is performed.
- the optical transmission/reception unit 21aX included in the optical communication device 2bX and the optical transmission/reception unit 21aY included in the optical communication device 2bY are connected via the optical transmission line 51, the optical transmission line 52, and the optical transmission line 53.
- FIG. The optical transmission/reception unit 21aX included in the optical communication device 2bX receives the transmission mode information that the control unit 12fX of the connection node device 1fX receives from the operation device 4e and outputs to the optical transmission line 51, and transmits the transmission mode information indicated by the received transmission mode information. An optical signal is transmitted and received through the optical transmission line 51 according to the mode.
- the optical transmission/reception unit 21aY included in the optical communication device 2bY receives the transmission mode information that the control unit 12fY of the connection node device 1fY receives from the operation device 4e and outputs to the optical transmission line 53, and transmits the transmission mode information indicated by the received transmission mode information.
- An optical signal is transmitted and received through the optical transmission line 53 according to the mode.
- step Sd8 shown in FIG. 20 of the fourth embodiment in addition to notifying the outside that the connection is not possible, The unit 21aY may be notified through the wavelength path of the fundamental wavelength that connection is not possible.
- connection node devices 1f- 1 to 1f-k a larger number of connection node devices having the same configuration
- connection lines 3-1 to 3-k connection lines 3-1 to 3-k, where k is an integer of 3 or more
- connection node devices 1f-1 to 1f-k are provided with a plurality of optical transmitter/receiver units having the same configuration as the optical transmitter/receiver units 21aX and 21aY. It is assumed that the connection is made in the form shown in another configuration example of the form.
- the transmission line design unit 42e of the operation device 4e transmits the connection information of the optical transmission line to which the connection node device 1f-1 is connected and the connection information transmitted by the control unit 12f-1 of the connection node device 1f-1.
- connection request data for requesting connection to the optical transceiver provided in the optical communication device connected to any of the node devices 1f-2 to 1f-k and identification information specifying the connection node device 1fX-1 are received. .
- the transmission line designing unit 42e starts the transmission mode specifying process in step Sc4 of FIG. As shown in the process of step Sd3, it waits for a certain period of time. If the connection status table 43 does not generate a record regarding the optical transceiver included in the optical communication device to be connected to after waiting for a certain period of time, the connection node devices 1f-2 to 1f-k fail to transmit connection information and the like. It is also assumed that In preparation for such a case, the transmission line designing unit 42e of the operation device 4e generates a trigger signal for transmitting connection information and the like through the connection line connected to each of the connection node devices 1f-2 to 1f-k. It is also possible to transmit to all the connection node devices 1f-2 to 1f-k other than the connection node device 1f-1, and cause the connection node devices 1f-2 to 1f-k to resend the connection information and the like.
- the controller 12fY of the connection node device 1fY receives a trigger signal for retransmitting the connection information and the like transmitted by the transmission path designing unit 42e of the operation device 4e.
- the control unit 12fY transmits a transmission path information acquisition instruction signal for acquiring transmission path information to all the optical communication devices connected to the connection node device 1fY in the basic mode by communication in the basic mode. In the following description, it is assumed that only one optical communication device 2bY is connected to the connection node device 1fY as shown in FIG. 17, for example.
- the optical receiver 28Y of the optical receiver 27Y of the optical transmitter/receiver 21aY included in the optical communication device 2bY receives the optical signal including the transmission path information acquisition instruction signal transmitted by the optical transmission path 53, and converts the received optical signal into an electrical signal. received data signal and output to the digital signal processing unit 23aY.
- the digital signal processing unit 23aY takes in the received data signal output from the photodetector 28Y, reads out a transmission path information acquisition instruction signal from the taken in reception data signal, and outputs the read out transmission path information acquisition instruction signal to the control unit 71aY. .
- the control unit 71aY When the control unit 71aY takes in the transmission line information acquisition instruction signal output by the digital signal processing unit 23aY, the control unit 71aY acquires information about the optical transmission line 53 from the received data signal taken in by the digital signal processing unit 23aY.
- the information about the optical transmission line 53 may be transmission line information of the optical transmission line 53 calculated by the control unit 71aY by a predetermined calculation based on the received data signal captured by the digital signal processing unit 23aY. Alternatively, it may be information necessary for calculating the transmission line information of the optical transmission line 53 .
- the control unit 71aY outputs the acquired information about the optical transmission line 53 to the digital signal processing unit 23aY for transmission to the connection node device 1fY. If the control unit 71aY has connection request data whose connection is pending, the control unit 71aY outputs the connection request data to the digital signal processing unit 23aY together with the calculated transmission line information of the optical transmission line 53. do.
- connection information generation unit 38aY of the connection node device 1fY instead of the process of calculating the transmission line information of the optical transmission line 53, generates the optical transmission line based on the information about the optical transmission line 53 transmitted by the optical communication device 2bY. 53 connection information can be obtained. More specifically, when the information about the optical transmission line 53 is the transmission line information of the optical transmission line 53, the connection information generating unit 38aY does not perform the process of calculating the transmission line information of the optical transmission line 53, Transmission line information of the transmission line 53 can be acquired. Further, when the information about the optical transmission line 53 is information necessary for calculating the transmission line information of the optical transmission line 53, the transmission line information of the optical transmission line 53 is calculated by a predetermined calculation based on the information. Thus, the transmission line information of the optical transmission line 53 can be acquired.
- the trigger signal causes the optical transceiver 21aX to and the optical transmitter/receiver 21aY.
- the transmission line designing unit 42e of the operation device 4e does not wait for a certain period of time in the process of step Sd3 of FIG. It becomes possible to acquire the transmission line information of the optical transmission line 53 and the connection request data from the unit 21aY and connect the optical transmission/reception unit 21aX and the optical transmission/reception unit 21aY.
- the transmission line information of the optical transmission line 53 calculated by the control unit 71aY of the optical transmission/reception unit 21aY, and the information necessary for the calculation of the transmission line information of the optical transmission line 53 by the connection information generation unit 38aY of the connection node device 1fY is the transmission line information of the optical transmission line 53 in the direction from the connection node device 1fY to the optical communication device 2bY.
- the transmission line information of the optical transmission line 53 calculated by the connection information generation unit 38aY of the connection node device 1fY is the optical transmission line in the direction from the optical communication device 2bY to the connection node device 1fY. 53 transmission path information.
- the characteristics of the optical fiber 53T included in the optical transmission line 53 and the characteristics of the optical fiber 53R can be generally considered to be the same. Therefore, even if the transmission line information of any optical transmission line 53 is used, similar transmission line characteristics can be calculated, and similar transmission modes can be specified.
- control unit 12fY of the connection node device 1fY may transmit a transmission path information acquisition instruction signal to the optical transmission/reception unit included in the newly connected optical communication device.
- the transmission path information acquisition instruction signal and the information about the optical transmission path 53 acquired by the control unit 71aY of the connection node device 1fY may be transmitted using an overhead space area of the transmission frame, or may be transmitted through the communication channel of the transmission frame. , or may be sent in the payload area of the transmission frame.
- the above optical transmission line 53 when acquiring the transmission line information of the optical transmission lines 51, 51-1 to 51-m, the above optical transmission line 53 , that is, instead of calculating the transmission path information of the optical fibers 51T, 51T-1 to 51T-m included in the optical transmission paths 51, 51-1 to 51-m, the optical fiber 51R , 51R-1 to 51R-m may be applied.
- an optical communication device 2X including an optical transmitter/receiver 21X having a single wavelength light source 25X and an optical transmitter/receiver 21Y having a single wavelength light source 25Y.
- the communication device 2Y may be connected to the connection node devices 1fX and 1fY, respectively.
- connection request data and the transmission mode information are transmitted using the empty area of the overhead area of the transmission frame.
- the connection request data and the transmission mode information may be transmitted through the communication channel of the transmission frame, or may be transmitted through the payload area of the transmission frame.
- connection information including BER is generated, but connection information without BER may be generated.
- optical input information is transmitted using communication channels.
- the optical input information may be transmitted by the GCC (General Communication Channel) of the frame header.
- connection source address information included in the connection request data may not be included.
- one optical transmitter/receiver 21aX and 21aY are connected to the connection node devices 1fX and 1fY, respectively. It is not necessary to include the connected source address information.
- the connection source address information included in the connection request data may not be included when generating the transmission mode information.
- the control units 71X, 71Y, 71aX, 71aY, 71X-1, 71Y-1, 71aX-1, 71aY-1 are transmission mode information output by the digital signal processing units 23X, 23Y, 23aX, 23aY, 23X-1, 23Y-1, 23aX-1, 23aY-1 , the optical transceivers 21X, 21Y, 21aX, 21aY, 21X-1, 21Y-1, 21aX-1, 21aY-1 having themselves stored in the internal storage area in the fetched transmission mode information It is not necessary to determine whether or not the address information assigned to the .
- the fundamental output optical power in the fundamental mode may not be predetermined.
- the optical signal when transmitting optical signals in the fundamental mode, single wavelength light sources 25X, 25Y, 25X-1 to 25X-m, 25Y-1 to 25Y-m, wavelength variable light sources 25aX, 25aY, 25aX-1 to 25aX -m, 25aY-1 to 25aY-m, the optical signal is generated with the output optical power of the initial value.
- the transmission line designing unit 42e of the above-described fourth embodiment configures the optical transmission line 52 corresponding to the connection information received from each of the connection node devices 1fX and 1fY and the connection destination address information included in the connection request data. Based on the transmission path information, end-to-end, that is, the transmission path characteristics from the connection source to the connection destination are calculated. In contrast, the following configuration may be used.
- Each of the control units 12fX and 12fY of the connection node devices 1fX and 1fY calculates the transmission line characteristics based on the connection information of the optical transmission lines 51 and 53, and replaces the calculated transmission line characteristics with the connection information to the operation device 4e.
- Send to The transmission line designing unit 42e of the operation device 4e calculates the transmission line characteristics of the optical transmission line 52 based on the transmission line information of the optical transmission line 52 stored in the internal storage area.
- the transmission line design unit 42e calculates the optical transmission line characteristics based on the transmission line characteristics of the optical transmission line 51, the transmission line characteristics of the optical transmission line 53, and the transmission line information of the optical transmission line 52 transmitted by the control units 12fX and 12fY.
- Estimated end-to-end transmission path characteristics may be calculated based on the transmission path characteristics of the path 52 .
- the transmission line designing unit 42e does not calculate the transmission line characteristics of the optical transmission line 52 based on the transmission line information of the optical transmission line 52, but calculates the transmission line characteristics of the optical transmission line 52 based on the transmission line information of the optical transmission line 52 in advance.
- the calculated transmission line characteristics of the optical transmission line 52 are stored in advance in an internal storage area, and instead of the process of calculating the transmission line characteristics of the optical transmission line 52, the internal storage area , the transmission line characteristics of the optical transmission line 52 may be read out.
- connection information generators 38, 38a, and 38aX included in the connection node devices 1, 1a, 1b, 1c, 1d, 1e, and 1fX calculate the transmission line information of the optical transmission line 51 multiple times.
- the connection information generator 38aY included in the connection node device 1fY further calculates the transmission line information of the optical transmission line 53 multiple times.
- the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, 42d, and 42e obtain all the transmission line information calculated multiple times as described above by the connection information generation units 38, 38a, 38aX, and 38aY. do.
- the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, 42d, and 42e calculate a plurality of transmission line characteristics corresponding to each of the acquired pieces of transmission line information, and calculated A plurality of transmission modes corresponding to each are identified based on each of the plurality of transmission path characteristics.
- the control unit 12 and the transmission line design units 42, 42a, 42b, 42c, 42d, and 42e select one transmission mode from among the plurality of identified transmission modes, that is, select the type of transmission mode. Among them, the transmission mode with the largest number of types may be selected, and the selected transmission mode may be used as the final transmission mode.
- connection information processing units 13, 13a, 13aX instead of the single-wavelength light sources 36, 36X, and 36Y included in 13aY, for example, a wavelength-tunable light source similar to the wavelength-tunable light source 25aX, in which the wavelength of the continuous light to be generated is predetermined to be the fundamental wavelength.
- connection information processing units 13, 13a, 13aX, and 13aY may be applied, and at the timing when the connection information processing units 13, 13a, 13aX, and 13aY are provided in the connection node devices 1, 1a, 1b, 1c, 1d, 1e, 1fX, and 1fY, the connection node
- the controllers 12, 12a, 12b, 12c, 12e, 12fX, and 12fY of the devices 1, 1a, 1b, 1c, 1e, 1fX, and 1fY output wavelength designation signals designating the fundamental wavelength to the variable wavelength light source.
- the wavelength of the wavelength tunable light source may be used as the fundamental wavelength.
- a wavelength tunable light source similar to the wavelength tunable light source 25aX, in which the wavelength of the continuous light to be generated is predetermined as the fundamental wavelength may be applied.
- 21X-1 to 21X-m, 21Y, 21Y-1 to 21Y-n are provided in the optical communication devices 2X, 2X-1 to 2X-m, 2Y, 2cY, 2Y-1 to 2Y-n.
- the control units 20X, 20X-1 to 20X-m, 20Y, 20aY, 20Y-1 to 20Y-n of the optical communication devices 2X, 2X-1 to 2X-m, 2Y, 2Y-1 to 20Y-n control A wavelength specifying signal designating a basic wavelength is output to the wavelength tunable light source via the units 71X, 71X-1 to 71X-m, 71Y, 71Y-1 to 71Y-n, and the wavelength of the wavelength tunable light source is output as the basic wavelength. You may make it a wavelength.
- control units 71X, 71X-1 to 71X-m, 71aX-1 to 71aX-m, 71aX, and 71aY are connected request data is generated.
- optical transmitter/receivers 21X, 21X-1 to 21X-m, 21aX-1 to 21aX-m, 21aX, 21aY are connected to the control units 20X, 20aX, 20X-1 to 20X-m, and 20Y, respectively. is stored in an internal storage area, connection request data is generated in place of the connection request instruction signal, and the generated connection request data is sent to the optical transmission/reception units 21X and 21X serving as connection sources.
- control units 71X, 71X-1 to 71X-m, 71aX-1 to 71aX-m, 71aX and 71aY may
- the control units 71X, 71X-1 to 71X-m, 71aX-1 to 71aX-m, 71aX and 71aY receive the connection request data output by the control units 20X, 20aX, 20X-1 to 20X-m and 20Y. Since it is sufficient to fetch and output the fetched connection request data, there is no need to generate the connection request data.
- connection information generators 38, 38a, 38aX, and 38aY may be as follows.
- the connection node device 1 of the first embodiment the IF unit 31, the optical reception unit 33, the optical transmission unit 35, and the digital signal processing unit 32 of the connection information processing unit 13 are integrated as one hardware package, Assume that it is configured to be inserted into the main body of the connection node device 1 .
- the connection information generation unit 38 and the control unit 12 may be functional units generated by executing a computer program in a CPU (Central Processing Unit) of the main body of the connection node device 1 .
- CPU Central Processing Unit
- a hardware package including the IF unit 31, the optical receiving unit 33, the optical transmitting unit 35, and the digital signal processing unit 32 is further provided with a CPU, and the CPU of the hardware package executes a computer program.
- the configuration may be such that the function part of the connection information generation part 38 is generated, and the function part of the control part 12 is generated by executing a computer program in the CPU of the main body of the connection node device 1 .
- an OTDR Optical Time Domain Reflectometer
- connection information generators 38, 38a, 38aX and 38aY may be provided outside the connection information processors 13, 13a, 13b, 13aX and 13aY. 38aX, 38aY and control units 12, 12a, 12b, 12c, 12d, 12e, 12fX, 12fY may be integrated. Part of the processing of the connection information generators 38, 38a, 38aX, 38aY is performed by the digital signal processors 32, 32a, 32aX, 32aY or the controllers 12, 12a, 12b, 12c, 12d, 12e, 12fX, 12fY. may be performed by either one or both.
- connection information generators 38, 38a, 38aX, 38aY Part of the processing of the connection information generators 38, 38a, 38aX, 38aY is performed by the digital signal processors 32, 32a, 32aX, 32aY, and the remaining processing is performed by the controllers 12, 12a, 12b, 12c, 12d, 12e, 12fX, and 12fY, and the connection information generators 38, 38a, 38aX, and 38aY may not be provided. Further, the processing of the connection information generators 38, 38a, 38aX, 38aY is performed by the digital signal processors 32, 32a, 32aX, 32aY, and the connection information generators 38, 38a, 38aX, 38aY are not provided. may be any combination of the connection information generators 38, 38a, 38aX, 38aY are not provided.
- Digital signal processing units 23X, 23aX, 23X-1 to 23X-m, 23aX-1 to 23aX-m, 23Y, 23aY, 23Y-1 to 23Y-n, 23aY-1 to 23aY-n, control Units 20X, 20aX, 20X-1 to 20X-m, 20Y, 20aY, 20Y-1 to 20Y-n, control units 71X, 71aX, 71X-1 to 71X-m, 71Y, 71aY, 71Y-1 to 71Y-n , transmission control unit 29X, digital signal processing units 32, 32a, 32aX, 32aY, connection information generation units 38, 38a, 38aX, 38aY, control units 12, 12a, 12b, 12c, 12d, 12e, 12fX, 12fY, operation device 4, 4a, 4b, 4c, 4d, and 4e may be implemented by a computer.
- a program for realizing this function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into a computer system and executed.
- the "computer system” referred to here includes hardware such as an OS and peripheral devices.
- the term "computer-readable recording medium” refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage devices such as hard discs incorporated in computer systems.
- “computer-readable recording medium” means a medium that dynamically retains a program for a short period of time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line.
- the program may also include something that holds the program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in that case.
- the program may be for realizing a part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system. It may be implemented using a programmable logic device such as an FPGA (Field Programmable Gate Array).
- It can be used when setting an optical path that passes through multiple optical transmission lines.
- SYMBOLS 1 Connection node apparatus 2X, 2Y... Optical communication apparatus 3... Connection line 11... Edge function part 12... Control part 13... Connection information processing part 14... Output port switching part 21Y... Optical transmission/reception part, 20Y...control unit, 51, 52...optical transmission line
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Abstract
Description
以下、本発明の実施形態について図面を参照して説明する。図1は、第1の実施形態における光伝送システム100の構成を示すブロック図である。光伝送システム100は、接続ノード装置1、光通信装置2X、光通信装置2Y、光伝送路51、光伝送路52及び接続回線3を備える。光伝送路51は、光通信装置2Xと接続ノード装置1とを接続する。光伝送路52は、光通信装置2Yと接続ノード装置1とを接続する。接続回線3は、接続ノード装置1と光通信装置2Yとを接続する。光通信装置2Xは、例えば、ユーザによって用いられる通信装置である。光通信装置2Yは、例えば、通信事業者が所有する光伝送装置、すなわち通信網におけるノード装置であるか、または、通信事業者もしくはデータセンタ事業者が所有するホワイトボックス型トランスポンダである。
図3は、光伝送システム100による処理の流れを示すフローチャートである。図2に示すように、接続ノード装置1の出力ポート切替部14は、初期状態において光伝送路51の接続先を、接続ノード装置1が備える接続情報処理部13にしている。より詳細には、光スイッチ部15Tは、光ファイバ51Tを、IF部31を介して光受光器34に接続し、光スイッチ部15Rは、光ファイバ51Rを、IF部31を介して光変調器37に接続する。
図5は、第2の実施形態における光伝送システム101の構成を示すブロック図である。第2の実施形態において、第1の実施形態と同一の構成については、同一の符号を付し、以下、異なる構成について説明する。光伝送システム101は、接続ノード装置1a、光通信装置2X、複数の光通信装置2Y-1~2Y-n、オペレーション装置4、光伝送路51、光伝送路52-1~52-n、接続回線3及びオペレーション装置4と光通信装置2Y-1~2Y-nの各々を接続する接続回線3-1~3-nを備える。ここで、nは、1以上の整数である。光伝送路51は、光通信装置2Xと接続ノード装置1aとを接続する。光伝送路52-1~52-nは、光通信装置2Y-1~2Y-nの各々と接続ノード装置1aとを接続する。接続回線3は、オペレーション装置4と接続ノード装置1aとを接続する。
図6は、第2の実施形態の光伝送システム101による処理の流れを示すフローチャートである。以下では、一例として、光通信装置2Xが備える光送受信部21Xが、光通信装置2Y-iの光送受信部21Y-iを接続先として接続する処理について説明する。図6のステップSa1,Sa2の処理は、第1の実施形態のステップS1,S2と同一の処理が行われる。ただし、ステップSa1において、光通信装置2Xの制御部20Xは、接続先のアドレス情報として、光通信装置2Y-iが備える光送受信部21Y-iのアドレス情報を含めて接続要求指示信号を生成しているものとし、光通信装置2Y-iは、光伝送路52-iと接続回線3-iに接続しているものとする。
図8は、第3の実施形態における光伝送システム102の構成を示すブロック図である。第3の実施形態において、第1及び第2の実施形態と同一の構成については、同一の符号を付し、以下、異なる構成について説明する。光伝送システム102は、接続ノード装置1b、光通信装置2aX、複数の光通信装置2bY-1~2bY-n、オペレーション装置4b、光伝送路51、光伝送路52-1~52-n、接続回線3及び接続回線3-1~3-nを備える。光通信装置2aXは、例えば、ユーザによって用いられる通信装置であり、光通信装置2bY-1~2bY-nは、例えば、通信事業者が所有する光伝送装置、すなわち通信網におけるノード装置であるか、または、通信事業者もしくはデータセンタ事業者が所有するホワイトボックス型トランスポンダである。光伝送路51は、光通信装置2aXと接続ノード装置1bとを接続する。光伝送路52-1~52-nは、光通信装置2bY-1~2bY-nの各々と接続ノード装置1bとを接続する。接続回線3は、オペレーション装置4bと接続ノード装置1bとを接続する。接続回線3-1~3-nは、オペレーション装置4bと光通信装置2bY-1~2bY-nの各々を接続する。
図10は、光伝送システム102による処理の流れを示すフローチャートである。図9に示すように、接続ノード装置1bの出力ポート切替部14aの光スイッチ部15aTは、光ファイバ51Tの基本波長の波長経路61T-Bを接続ノード装置1bのIF部31を介して光受信部33に接続させている。光スイッチ部15aRは、光ファイバ51Rの基本波長の波長経路61R-Bを接続ノード装置1bのIF部31を介して光変調器37に接続させている。
以下、説明の便宜上、接続要求データを送信する側の光信号の生成に用いる光源が単一波長光源である場合を、第2の実施形態の他の構成例とし、接続要求データを送信する側の光信号を生成する際に用いる光源が波長可変光源である場合を、第3の実施形態の他の構成例として説明する。なお、以下に示す第2及び第3の実施形態の他の構成例において、第1から第3の実施形態と同一の構成については、同一の符号を付している。
図14は、第2の実施形態の他の構成例である光伝送システム101bの構成を示すブロック図である。光伝送システム101bは、光通信装置2X-1~2X-m、接続ノード装置1c、光通信装置2Y-1~2Y-n、オペレーション装置4、光通信装置2X-1~2X-mの各々と接続ノード装置1cとを接続する光伝送路51-1~51-m、光通信装置2Y-1~2Y-nの各々と接続ノード装置1cとを接続する光伝送路52-1~52-n、オペレーション装置4と接続ノード装置1cとを接続する接続回線3及びオペレーション装置4と光通信装置2Y-1~2Y-nの各々を接続する接続回線3-1~3-nを備える。
図15は、第3の実施形態の他の構成例である光伝送システム102bの構成を示すブロック図である。光伝送システム102bは、光通信装置2eX-1~2eX-m、接続ノード装置1d、光通信装置2fY、オペレーション装置4c、波長多重分離装置6X、波長多重分離装置6Y、光伝送路51、光伝送路52、接続回線3及びオペレーション装置4cと光通信装置2fYとを接続する接続回線3-1を備える。光伝送路51は、波長多重分離装置6Xと接続ノード装置1dとを接続する。光伝送路52は、波長多重分離装置6Yと接続ノード装置1dとを接続する。接続回線3は、オペレーション装置4と接続ノード装置1dとを接続する。接続回線3-1は、オペレーション装置4cと光通信装置2fYとを接続する。
図16は、第2の実施形態の他の構成例による光伝送システム101cの構成を示すブロック図である。光伝送システム101cは、接続ノード装置1e、光通信装置2X、複数の光通信装置2bY-1~2bY-n、オペレーション装置4d、波長多重分離装置6Y、光伝送路51、光伝送路52、接続回線3及び接続回線3-1~3-nを備える。光伝送路51は、光通信装置2Xと接続ノード装置1eとを接続する。光伝送路52は、波長多重分離装置6Yと接続ノード装置1eとを接続する。接続回線3は、オペレーション装置4dと接続ノード装置1eとを接続する。接続回線3-1~3-nは、オペレーション装置4dと光通信装置2bY-1~2bY-nの各々とを接続する。
なお、上記した光伝送システム101,101a,101b,101c,102,102a,102bに示した構成以外に、以下のような構成であってもよい。例えば、図8に示す光伝送システム102において、光通信装置2aXが、波長多重分離部6aXを備えず、光送受信部21aX-1~21aX-mの各々に対して、それぞれ1本ずつの光伝送路(このm本の光伝送路の符号を51-1~51-mとする)の一端が接続し、光伝送路51-1~51-mの他端を出力ポート切替部14aに接続するようにしてもよい。
図17は、第4の実施形態における光伝送システム103の構成を示すブロック図である。第4の実施形態において、第1から第3の実施形態及び各々の実施形態の他の構成例と同一の構成については、同一の符号を付し、以下、異なる構成について説明する。光伝送システム103は、光通信装置2bX、2bY、接続ノード装置1fX,1fY、オペレーション装置4e、光通信装置2bXの光送受信部21aXと接続ノード装置1fXの出力ポート切替部14aXとを接続する光伝送路51、光通信装置2bYの光送受信部21aYと接続ノード装置1fYの出力ポート切替部14aYとを接続する光伝送路53、接続ノード装置1fXの出力ポート切替部14aXと接続ノード装置1fYの出力ポート切替部14aYとを接続する光伝送路52、接続ノード装置1fXとオペレーション装置4eとを接続する接続回線3X及び接続ノード装置1fYとオペレーション装置4eとを接続する接続回線3Yを備える。ここで、光伝送路52は、例えば、通信事業者が有するキャリアネットワークを構成する光伝送路であり、光伝送路51,53は、例えば、ダークファイバである。光通信装置2bX,2bYは、例えば、ユーザによって用いられる通信装置である。
次に、図19及び図20を参照しつつ第4の実施形態の光伝送システム103による処理について説明する。図19は、第4の実施形態の光伝送システム103による処理の流れを示すフローチャートである。接続ノード装置1fXの出力ポート切替部14aXは、初期状態において、光伝送路51の基本波長の波長経路を接続ノード装置1fXのエッジ機能部11fXの接続情報処理部13aXに接続している。接続ノード装置1fYの出力ポート切替部14aYは、初期状態において、光伝送路53の基本波長の波長経路を接続ノード装置1fYのエッジ機能部11fYの接続情報処理部13aYに接続している。
上記の第4の実施形態の光伝送システム103は、2台の接続ノード装置1fX,1fYを備えているが、より多くの台数の同一構成の接続ノード装置(以下、これらを接続ノード装置1f-1~1f-kといい、接続ノード装置1f-1~1f-kの各々に接続する接続回線を接続回線3-1~3-kという。ここで、kは、3以上の整数である)を備えるようにしてもよい。接続ノード装置1f-1~1f-kの各々には、複数の光送受信部であって光送受信部21aX,21aYと同一構成の機能部が、例えば、第2,3の実施形態及び各々の実施形態の他の構成例で示した形態で接続しているものとする。この場合に、オペレーション装置4eの伝送路設計部42eは、例えば、接続ノード装置1f-1の制御部12f-1が送信する接続ノード装置1f-1が接続する光伝送路の接続情報と、接続ノード装置1f-2~1f-kのいずれかに接続する光通信装置が備える光送受信部に接続を要求する接続要求データと、接続ノード装置1fX-1を特定する識別情報とを受信したとする。
例えば、第4の実施形態の光通信装置2bXの光送受信部21aXが、光通信装置2bYの光送受信部21aYを接続先とする接続要求データを送信することにより、接続ノード装置1fYの制御部12fYが、上記したオペレーション装置4eの伝送路設計部42eが送信する接続情報などを再送させるためのトリガ信号を受信したとする。制御部12fYは、接続ノード装置1fYに基本モードで接続している全ての光通信装置に対して、伝送路情報を取得させるための伝送路情報取得指示信号を基本モードの通信により送信する。ここでは、接続ノード装置1fYには、例えば、図17に示すように光通信装置2bYの1台のみが接続しているものとして、以下の説明を行う。
Claims (20)
- 光伝送路に関する情報である伝送路情報を含む接続情報を取得する接続情報処理部と、
第1の光伝送路と、第2の光伝送路と、前記接続情報処理部とに接続し、初期状態において前記第1の光伝送路の接続先を、前記接続情報処理部とする出力ポート切替部と、
前記接続情報処理部が前記第1の光伝送路に接続する光通信装置が備える光送受信部が送信する光信号から取得する前記第1の光伝送路の接続情報と、前記光送受信部が前記光信号に含めて送信する接続要求データと、前記第2の光伝送路の伝送路情報とに基づいて特定される伝送モードを示す伝送モード情報を前記第1の光伝送路を通じて前記光送受信部に送信する制御部と、を備え、
前記出力ポート切替部は、
前記制御部が前記伝送モード情報を送信した後に、前記第1の光伝送路の接続先を、前記接続情報処理部から前記第2の光伝送路に切り替える切替処理を行う、
接続ノード装置。 - 前記第1の光伝送路は、複数存在し、
前記制御部は、
前記接続情報処理部がいずれか1つの前記第1の光伝送路に接続する前記光送受信部が送信する光信号から取得する当該光信号を伝送した前記第1の光伝送路の接続情報と、前記光送受信部が前記光信号に含めて送信する接続要求データと、前記第2の光伝送路の伝送路情報とに基づいて特定される伝送モードを示す伝送モード情報を、前記第1の光伝送路を通じて前記接続要求データに示されている接続元の前記光送受信部に送信し、
前記出力ポート切替部は、
前記制御部が前記伝送モード情報を送信した後に、前記接続要求データに示されている接続元の前記光送受信部が接続する前記第1の光伝送路の接続先を、前記接続情報処理部から前記第2の光伝送路に切り替える切替処理を行う、
請求項1に記載の接続ノード装置。 - 前記第1の光伝送路において、光信号は波長多重で通信可能とされており、
前記出力ポート切替部は、
初期状態において前記第1の光伝送路において予め定められる基本波長の接続先を、前記接続情報処理部にしており、
前記制御部は、
前記接続情報処理部が前記第1の光伝送路に接続する前記光送受信部が前記基本波長で送信する光信号から取得する前記第1の光伝送路の接続情報と、前記光送受信部が前記光信号に含めて送信する接続要求データと、前記第2の光伝送路の伝送路情報とに基づいて特定される伝送モードを示す伝送モード情報を、前記第1の光伝送路の前記基本波長を通じて前記接続要求データに示されている接続元の前記光送受信部に送信し、
前記出力ポート切替部は、
前記制御部が前記伝送モード情報を送信した後に、前記接続要求データに示されている接続元の前記光送受信部が接続する前記第1の光伝送路に含まれる前記伝送モード情報に示されている波長である波長経路の接続先を、前記第2の光伝送路に含まれる前記伝送モード情報に示されている波長である波長経路とする切替処理を行う、
請求項1又は2に記載の接続ノード装置。 - 前記第2の光伝送路は、複数存在し、
前記制御部は、
前記接続情報処理部が取得する前記第1の光伝送路の接続情報と、前記接続要求データと、前記接続要求データに示されている接続先に対応する前記第2の光伝送路の伝送路情報とに基づいて特定される伝送モードを示す伝送モード情報を前記第1の光伝送路を通じて前記光送受信部に送信し、
前記出力ポート切替部は、
前記制御部が前記伝送モード情報を送信した後に、前記接続要求データに示されている接続先に対応する前記第2の光伝送路を接続先とする前記切替処理を行う、
請求項1から3のいずれか一項に記載の接続ノード装置。 - 前記第2の光伝送路において、光信号は波長多重で通信可能とされており、
前記制御部は、
前記接続情報処理部が取得する前記第1の光伝送路の接続情報と、前記接続要求データと、前記接続要求データに示されている接続先に対応する前記第2の光伝送路の伝送路情報とに基づいて特定される伝送モードを示す伝送モード情報を前記第1の光伝送路を通じて前記光送受信部に送信し、
前記出力ポート切替部は、
前記制御部が前記伝送モード情報を送信した後に、前記接続要求データに示されている接続先に対応する前記第2の光伝送路に含まれる前記伝送モード情報に示されている波長の波長経路を接続先とする前記切替処理を行う、
請求項1から4のいずれか一項に記載の接続ノード装置。 - 前記接続ノード装置は、与えられる光の波長を、前記制御部から受ける波長に変換して出力する波長変換部を備え、
前記光送受信部は、単一波長の光を出力する光源を有しており、
前記出力ポート切替部は、
前記制御部が前記伝送モード情報を送信した後に、切り替え後の接続先を、前記波長変換部とし、
前記制御部は、
前記伝送モード情報に示されている波長を前記波長変換部に出力し、
前記波長変換部は、
前記光送受信部が前記第1の光伝送路に送出した光信号を前記出力ポート切替部を介して受信し、受信した光信号の波長を前記制御部から受けた波長に変換して、前記接続要求データに示されている接続先に対応する前記第2の光伝送路に送出する、
請求項5に記載の接続ノード装置。 - 請求項1から6のいずれか一項に記載の接続ノード装置と、
前記接続ノード装置が一端に接続する前記第1の光伝送路の他端に接続する第1の光通信装置と、
前記接続ノード装置が一端に接続する前記第2の光伝送路を介して、直接、または、間接に前記接続ノード装置に接続する第2の光通信装置と、
を備える光伝送システムであって、
前記第1の光通信装置が備える光送受信部は、
前記接続ノード装置の前記制御部が前記第1の光伝送路を通じて送信する前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第1の光伝送路を通じて光信号を送受信し、
前記第2の光通信装置が備える光送受信部は、
前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第2の光伝送路を通じて光信号を送受信し、
前記接続ノード装置の出力ポート切替部は、
前記制御部が前記伝送モード情報を前記第1の光伝送路を通じて前記第1の光通信装置に送信した後に、前記切替処理により、前記第1の光通信装置が備える光送受信部と前記第2の光通信装置が備える光送受信部との間を、前記第1の光伝送路及び前記第2の光伝送路を介して接続する、
光伝送システム。 - 前記第2の光通信装置は、前記第2の光伝送路の他端に接続し、
前記接続ノード装置の制御部は、
前記第2の光伝送路を取得し、取得した前記第2の光伝送路の伝送路情報と、前記接続情報処理部が取得する前記第1の光伝送路の接続情報と、前記接続要求データとに基づいて前記伝送モードを特定する前記伝送モード情報を生成し、生成した前記伝送モード情報を前記第1の光伝送路を通じて前記第1の光通信装置に送信し、更に、前記伝送モード情報を前記第2の光通信装置に送信し、
前記第2の光通信装置が備える光送受信部は、
前記制御部が送信する前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第2の光伝送路を通じて光信号を送受信する、
請求項7に記載の光伝送システム。 - 前記接続ノード装置に接続するオペレーション装置を備え、
前記オペレーション装置は、
前記第2の光伝送路の伝送路情報を取得し、取得した前記第2の光伝送路の伝送路情報と、前記接続ノード装置の前記接続情報処理部が前記第1の光通信装置が備える光送受信部が送信する光信号から取得する前記第1の光伝送路の接続情報と、前記第1の光通信装置が備える前記光送受信部が前記光信号に含めて送信する接続要求データとに基づいて前記伝送モードを特定する伝送モード情報を生成して前記接続ノード装置の制御部に送信し、
前記第1の光通信装置が備える光送受信部は、
前記接続ノード装置の前記制御部が前記オペレーション装置から受信して前記第1の光伝送路を通じて送信する前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第1の光伝送路を通じて光信号を送受信する、
請求項7に記載の光伝送システム。 - 前記第2の光通信装置は、前記第2の光伝送路の他端に接続し、
前記オペレーション装置は、
前記接続ノード装置と、前記第2の光通信装置とに接続し、前記伝送モード情報を、前記接続ノード装置の制御部と、前記第2の光通信装置とに送信し、
前記第2の光通信装置が備える光送受信部は、
前記オペレーション装置が送信する前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第2の光伝送路を通じて光信号を送受信する、 請求項9に記載の光伝送システム。 - 第3の光伝送路と、
前記第3の光伝送路に接続する第2の光通信装置と、を備え、
前記接続ノード装置は、複数台存在しており、
一方の前記接続ノード装置の前記出力ポート切替部は、前記第1の光伝送路と、前記第2の光伝送路と、自装置の前記接続情報処理部とに接続し、初期状態において前記第1の光伝送路の接続先を、自装置の前記接続情報処理部とし、
前記一方の接続ノード装置以外のいずれか1つであって前記第3の光伝送路に接続する他方の前記接続ノード装置の前記出力ポート切替部は、前記第3の光伝送路と、一端において前記一方の接続ノード装置が接続する前記第2の光伝送路の他端と、自装置の前記接続情報処理部とに接続し、初期状態において前記第3の光伝送路の接続先を、自装置の前記接続情報処理部とし、
前記オペレーション装置は、
前記一方の接続ノード装置と、前記他方の接続ノード装置とに接続し、前記第2の光伝送路の伝送路情報を取得し、取得した前記第2の光伝送路の伝送路情報と、前記一方の接続ノード装置の前記接続情報処理部が前記第1の光通信装置が備える光送受信部が送信する光信号から取得する前記第1の光伝送路の接続情報と、前記第1の光通信装置が備える光送受信部が前記光信号に含めて送信する接続要求データと、前記他方の接続ノード装置の前記接続情報処理部が前記第2の光通信装置が備える光送受信部が送信する光信号から取得する前記第3の光伝送路の接続情報と、前記第2の光通信装置が備える光送受信部が前記光信号に含めて送信する接続要求データとに基づいて前記伝送モードを特定する伝送モード情報を生成し、生成した前記伝送モード情報を、前記一方の接続ノード装置の前記制御部と、前記他方の接続ノード装置の前記制御部とに送信し、
前記第1の光通信装置が備える光送受信部は、
前記一方の接続ノード装置の前記制御部が前記オペレーション装置から受信して前記第1の光伝送路を通じて送信する前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第1の光伝送路を通じて光信号を送受信し、
前記第2の光通信装置が備える光送受信部は、
前記他方の接続ノード装置の前記制御部が前記オペレーション装置から受信して前記第3の光伝送路を通じて送信する前記伝送モード情報を受信し、受信した前記伝送モード情報が示す伝送モードにより前記第3の光伝送路を通じて光信号を送受信し、
前記一方の接続ノード装置の出力ポート切替部は、
前記一方の接続ノード装置の制御部が前記伝送モード情報を前記第1の光伝送路を通じて前記第1の光通信装置の光送受信部に送信した後に、前記切替処理を行うことにより、前記第1の光伝送路と、前記第2の光伝送路との間を接続し、
前記他方の接続ノード装置の出力ポート切替部は、
前記他方の接続ノード装置の制御部が前記伝送モード情報を前記第3の光伝送路を通じて前記第2の光通信装置の光送受信部に送信した後に、前記切替処理を行うことにより、前記第2の光伝送路と、前記第3の光伝送路との間を接続する、
請求項9に記載の光伝送システム。 - 前記接続ノード装置の制御部は、
前記接続情報処理部が取得する前記接続情報と、前記接続要求データに示されている接続先に対応する前記第2の光伝送路の伝送路情報とに基づいて、伝送路特性を算出し、算出した前記伝送路特性に基づいて前記伝送モードを特定する前記伝送モード情報を生成するか、または、前記接続要求データに示されている接続先に対応する前記第2の光伝送路の伝送路情報に基づいて算出する伝送路特性と、前記接続情報処理部から取得した前記接続情報に基づいて算出する伝送路特性とに基づいて前記伝送モードを特定する前記伝送モード情報を生成する、
請求項8に記載の光伝送システム。 - 前記オペレーション装置は、
前記接続情報処理部が取得する前記接続情報と、前記接続要求データに示されている接続先に対応する前記第2の光伝送路の伝送路情報とに基づいて、伝送路特性を算出し、算出した前記伝送路特性に基づいて前記伝送モードを特定する前記伝送モード情報を生成するか、または、前記接続要求データに示されている接続先に対応する前記第2の光伝送路の伝送路情報に基づいて算出する伝送路特性と、前記接続ノード装置の前記制御部が前記接続情報処理部から取得した前記接続情報に基づいて算出する伝送路特性とに基づいて前記伝送モードを特定する前記伝送モード情報を生成する、
請求項9から11のいずれか一項に記載の光伝送システム。 - 前記第1の光伝送路に接続する前記接続ノード装置の前記接続情報処理部は、
前記第1の光通信装置から前記接続ノード装置に至る方向の前記第1の光伝送路の伝送路情報を取得するか、または、前記接続ノード装置から前記第1の光通信装置に至る方向の前記第1の光伝送路の伝送路情報を取得する、
請求項7から請求項11のいずれか一項に記載の光伝送システム。 - 前記オペレーション装置は、
前記第3の光伝送路の接続情報と、前記第2の光通信装置が備える光送受信部が前記光信号に含めて送信する接続要求データとを前記他方の接続ノード装置から受信していない場合、前記第3の光伝送路の接続情報と、前記接続要求データとを送信させるためのトリガ信号を、前記他方の接続ノード装置に対して送信する、
請求項11に記載の光伝送システム。 - 前記第2の光通信装置が備える光送受信部は、
前記他方の接続ノード装置が送信する光信号から前記第3の光伝送路に関する情報を取得し、取得した前記第3の光伝送路に関する情報を、前記第3の光伝送路を通じて前記他方の接続ノード装置に送信し、
前記他方の接続ノード装置の前記接続情報処理部は、前記第3の光伝送路を通じて前記第2の光通信装置が備える光送受信部が送信する前記第3の光伝送路に関する情報を受信し、受信した前記第3の光伝送路に関する情報から前記他方の接続ノード装置から前記第2の光通信装置に至る方向の前記第3の光伝送路の伝送路情報を取得する、
請求項11、または、請求項15に記載の光伝送システム。 - 前記接続ノード装置が、請求項2又は請求項3に記載の接続ノード装置である場合に、
複数の前記光送受信部が、前記第1の光伝送路に接続しており、
前記接続ノード装置の前記制御部は、
前記接続要求データの衝突を回避させるための初期設定情報を前記第1の光伝送路を通じて複数の前記光送受信部に対して送信し、
複数の前記光送受信部は、
前記第1の光伝送路を通じて前記初期設定情報を含む光信号を受信し、受信した前記初期設定情報にしたがって前記接続要求データを送信する、
請求項7から請求項10のいずれか一項に記載の光伝送システム。 - 前記第1の光通信装置は、
複数の前記光送受信部と、
複数の前記光送受信部が前記第1の光伝送路を通じて送信する前記接続要求データが衝突しないように、複数の前記光送受信部が前記接続要求データを送信するタイミングを調整する送信制御部と、
を備える請求項7から請求項10、及び請求項17のいずれか1項に記載の光伝送システム。 - 前記第1の光伝送路に接続する前記光送受信部は、
前記接続要求データを送信した後、前記接続ノード装置から応答の光信号を予め定められる待機時間の間に受信しなかった場合、任意に定められる時間、光出力を停止する、
請求項7から請求項10、請求項17、及び請求項18のいずれか一項に記載の光伝送システム。 - 出力ポート切替部が、第1の光伝送路と、第2の光伝送路と、光伝送路に関する情報である伝送路情報を含む接続情報を取得する接続情報処理部とに接続し、初期状態において前記第1の光伝送路の接続先を、前記接続情報処理部とし、
制御部が、前記接続情報処理部が前記第1の光伝送路に接続する光通信装置が備える光送受信部が送信する光信号から取得する前記第1の光伝送路の接続情報と、前記光送受信部が前記光信号に含めて送信する接続要求データと、前記第2の光伝送路の伝送路情報とに基づいて特定される伝送モードを示す伝送モード情報を前記第1の光伝送路を通じて前記光送受信部に送信し、
前記出力ポート切替部が、前記制御部が前記伝送モード情報を送信した後に、前記第1の光伝送路の接続先を、前記接続情報処理部から前記第2の光伝送路に切り替える切替処理を行う、
接続方法。
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