WO2017169876A1 - 管理装置、特定方法とそのプログラムを格納した記録媒体 - Google Patents
管理装置、特定方法とそのプログラムを格納した記録媒体 Download PDFInfo
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- WO2017169876A1 WO2017169876A1 PCT/JP2017/010831 JP2017010831W WO2017169876A1 WO 2017169876 A1 WO2017169876 A1 WO 2017169876A1 JP 2017010831 W JP2017010831 W JP 2017010831W WO 2017169876 A1 WO2017169876 A1 WO 2017169876A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
- H04L43/0864—Round trip delays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
- H04L45/121—Shortest path evaluation by minimising delays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
Definitions
- the present invention relates to a management device for an optical transmission system having a transmission path in which a transmission path length between optical transmission / reception apparatuses is changed by path switching.
- the physical transmission path of the optical main signal may change as the optical transmission system becomes more sophisticated, such as the redundancy of the transmission path due to the route diversity configuration or the ROADM (Reconfigurable Optical Add / Drop Multiplex) function. . Under such circumstances, it is important to obtain information from the optical transmission / reception apparatus of the optical transmission system or the equipment on the transmission path to grasp the state of the optical transmission system.
- ROADM Reconfigurable Optical Add / Drop Multiplex
- Patent Document 1 as a method for selecting a plurality of transmission paths, a delay time is calculated from a test packet reciprocated once between a mobile station and a base station, and a transmission path with the smallest delay time is selected. Is described.
- Patent Document 2 describes that a transmission delay amount in a transmission path is measured, a transmission loss is estimated, and used for power adjustment of optical transmission.
- Patent Document 3 describes a method for measuring the round-trip delay time.
- JP 2008-072181 A Japanese Patent Laid-Open No. 2005-341022 JP 2005-269034 A
- One method of grasping the state of the optical transmission system is a method of determining the path through which the received light has passed in the shape of the optical spectrum of the received light.
- the method using the optical spectrum of the received light cannot identify the transmission path of the optical transmission system because there is no change in the shape of the optical spectrum in the path switching unit of the transmission path.
- An object of the present invention is to provide a management device or the like that can identify a transmission path of a transmission path even when communication with a device in the transmission path of an optical transmission system is impossible.
- a management device is a management device for an optical transmission system having a transmission path having a different transmission path length for each transmission path between the first and second optical transmission / reception apparatuses.
- Route delay information indicating a transmission delay time is registered in advance, a measurement delay time that is a transmission delay time of the transmission path measured by the first optical transmission / reception device is collected, and based on the path delay information and the measurement delay time
- a management unit that identifies the transmission path corresponding to the measurement delay time.
- a specifying method is a method for specifying a transmission path in an optical transmission system having a transmission path having a different transmission path length for each transmission path between the first and second optical transmission / reception apparatuses. Registering path delay information indicating transmission delay time for each path, collecting measurement delay time that is transmission delay time of the transmission path measured by the first optical transmission / reception device, and collecting the path delay information and the measurement delay time. Based on the above, a transmission path related to the measurement delay time is specified.
- a program stored in a recording medium is a program for specifying a transmission path in an optical transmission system having transmission paths having different transmission path lengths for each transmission path between the first and second optical transceivers.
- the path delay information indicating the transmission delay time for each transmission path is registered, and the measurement delay time that is the transmission delay time of the transmission path measured by the first optical transceiver is collected, Based on the path delay information and the measurement delay time, a transmission path related to the measurement delay time is specified.
- the transmission path of the transmission path can be specified even when communication with the device in the transmission path of the optical transmission system is impossible.
- FIG. 7 is a block diagram showing a hardware configuration in which the management device in the first to sixth embodiments is realized by a computer device.
- FIG. 1 is a block diagram illustrating a configuration of a management apparatus and an optical transmission system according to the first embodiment. First, the configuration of the optical transmission system managed by the management apparatus will be described.
- the optical transmission system includes an optical transmission / reception device 3 installed in a station X, an optical transmission / reception device 4 installed in a station Y, an optical transmission / reception device 3 and an optical transmission system.
- a transmission path 10 for connecting the transmission / reception device 4 is provided.
- the transmission line 10 is mainly composed of an optical fiber, but may include devices such as a repeater in addition to the optical fiber.
- the path switching unit 1 and the path switching unit 2 are installed on the transmission path 10 and have a function of switching a path for transmitting an optical signal to one of the paths A and B. As shown in FIG. 1, the route switching unit 1 and the route switching unit 2 form a route A and a route B having different route lengths as route redundant sections in the transmission line 10. The switching of the path switching units 1 and 2 is performed autonomously when an instruction from the management device 9 or the path switching units 1 and 2 detect a path failure.
- a path X is defined between the optical transmission / reception apparatus 3 and the path switching unit 1
- a path Y is defined between the optical transmission / reception apparatus 4 and the path switching unit 2.
- FIG. 2 is a table showing a path configuration between the optical transceiver 3 and the optical transceiver 4.
- the paths from the optical transceiver 3 to the optical transceiver 4 are a transmission path 1-1 including a path X, a path A and a path Y, and a transmission path 1- including a path X, a path B and a path Y. 2
- the optical transceivers 3 and 4 include optical transponders 5 and 7, respectively.
- the optical transponder 5 of the optical transmission / reception device 3 has a function of transmitting an optical signal to the optical transmission / reception device 4 in the office Y and receiving an optical signal from the optical transponder 7 of the optical transmission / reception device 4.
- FIG. 3 is a block diagram showing an example of the configuration of the optical transponder of the optical transceiver.
- the optical transponder 5 includes a signal generation unit 20, an information addition unit 21, an optical modulation unit 22, a light reception unit 23, an information extraction unit 24, a signal restoration unit 25, and an information management unit 26.
- the signal generation unit 20 generates a main signal, and the information addition unit 21 adds measurement information to the generated main signal.
- the measurement information is added to the main signal as overhead information, for example.
- the measurement information is information for measuring the transmission delay time, and is generated by the information management unit 26.
- An example of measurement information is time information.
- the optical modulator 22 converts the main signal to which the measurement information is added into an optical signal and transmits it to the transmission line.
- the light receiving unit 23 receives the optical signal transmitted from the optical transceiver 4 in the opposite office Y and converts it into a main signal.
- the information extraction unit 24 extracts measurement information added to the main signal, and the information management unit 26 acquires a transmission delay time based on the extracted measurement information. Then, the information management unit 26 transmits the acquired transmission delay time to the management device 9. The main signal is restored by the signal restoration unit 25.
- the transmission delay time is acquired using the time included in the time information and the time when the information management unit 26 receives the measurement information from the information extraction unit 24.
- the transmission delay time means a round trip time (round trip time) for reciprocating between apparatuses connected by a transmission path unless otherwise specified.
- the optical transponder 7 of the optical transceiver 4 has the same configuration as the optical transponder 5. However, when measurement information is added to the optical signal received by the optical transponder 7, a part of the configuration of the optical transponder 7 functions as follows.
- the light receiving unit 23 of the optical transponder 7 receives the optical signal transmitted from the optical transmission / reception device 3 of the office X and converts it into a main signal. Further, the information extraction unit 24 extracts measurement information of the optical transponder 5 on the station X side from the main signal, and the information management unit 26 passes the measurement information on the station X side to the information adding unit 21.
- the signal generation unit 20 generates a main signal, and the information addition unit 21 adds measurement information on the station X side to the generated main signal.
- the optical modulator 22 converts the main signal to which the measurement information is added into an optical signal and transmits it to the transmission line.
- the configuration of the optical transponder 5 for measuring the transmission delay time is not limited to the above. A configuration other than the above may be used as the configuration for adding the time information to the output light of the optical transponder 5 or the configuration for extracting the time information from the received light. For example, although the time information is transmitted and received by the overhead part of the optical transponders 5 and 7, a dedicated wavelength for transmitting and receiving the time information or a structure using a dedicated transceiver may be used.
- the management device 9 registers in advance transmission delay time corresponding to the transmission path of the transmission path between the optical transmission / reception apparatuses as path delay information, and transmits from the optical transponder 5 when it is necessary to specify the transmission path in the transmission path.
- the transmission delay time of the transmission path of the line 10 is collected as the measurement delay time.
- the management device 9 specifies a transmission path corresponding to the measurement delay time based on the collected measurement delay time and path delay information.
- the management device 9 includes a collection unit 91 and a specification unit 92. Further, it is assumed that the management device 9 can communicate with the optical transponder 5 in the station X by a communication unit (not shown).
- the collection unit 91 of the management apparatus 9 sets transmission delay times corresponding to the transmission path 1-1 including the path A and the transmission path 1-2 including the path B in the transmission path 10 between the optical transmission / reception apparatuses 3 and 4, respectively.
- the route delay information is registered in a storage unit (not shown) of the management device 9.
- the path delay information is the transmission delay time of the transmission path collected by the collection unit 91 of the management apparatus 9 from the optical transponder 5 of the optical transmission / reception apparatus 3 before the operation of the optical transmission system is started.
- the collection unit 91 of the management apparatus 9 causes the optical transponder of the optical transmission / reception apparatus 3 to acquire information. 5, and collects a measurement delay time that is a transmission delay time of the transmission line 10 measured by the optical transponder 5.
- FIG. 4 is a table showing the relationship between the transmission delay time acquired by the optical transponder 5 and the path.
- the paths connecting the optical transceivers 3 and 4 are the transmission path 1-1 configured by the path X-path A-path Y, and the path X-path B-path Y.
- the transmission path 1-2 configured as described above.
- the transmission delay time of the transmission path 1-1 measured by the optical transponder 5 is LA (microsecond to millisecond)
- the transmission delay time in the transmission path 1-2 is LB (microsecond to Milliseconds).
- the transmission delay time is assumed to be measured through the same path of the optical signal in the forward path and the return path between the optical transceivers.
- the transmission delay time of the transmission line 10 measured by the information management unit 26 of the optical transponder 5 is the path length of the transmission line 10. It changes according to. In the transmission path shown in FIG. 4, when the path length of the path A of the transmission path 1-1 is shorter than the path length of the path B of the transmission path 1-2, the transmission delay time of the transmission path 1-1 and the transmission path 1-2 The relationship is LA (microsecond to millisecond) ⁇ LB (microsecond to millisecond).
- the specifying unit 92 of the management device 9 specifies a transmission path corresponding to the measurement delay time based on the collected measurement delay time and the registered path delay information.
- the measurement delay time is between the transmission delay time LA (microseconds to milliseconds) and the transmission delay time LB (microseconds to milliseconds)
- the specifying unit 92 supports a transmission delay time that is close to the measurement delay time. Specified as the transmission route to be used.
- the measurement delay time collected by the collection unit 91 is shorter than the transmission delay time LA (microseconds to milliseconds) of the transmission path 1-1 by the transmission delay time LB (microseconds to milliseconds) of the transmission path 1-2. If the two are close to each other, the specifying unit 92 specifies the transmission path 1-2 as the transmission path corresponding to the collected measurement delay time.
- the specification of the transmission path by the specifying unit 92 is not limited to the above.
- the measurement delay time collected by the collection unit 91 may be compared with the measurement delay time for each transmission path registered in advance, and the transmission path may be identified based on the increase or decrease in the measurement delay time.
- FIG. 5 is a flowchart showing the operation of the management apparatus.
- the collection unit 91 of the management apparatus 9 registers path delay information indicating the transmission delay time for each transmission path of the transmission path 10 between the optical transmission / reception apparatuses 3 and 4 in a storage unit (not shown) of the management apparatus 9 (step). S11).
- the collection unit 91 of the management device 9 communicates with the optical transponder 5 of the optical transmission / reception device 3 and collects the measurement delay time that is the transmission delay time of the transmission line 10 measured by the optical transponder 5 (step S12).
- the specifying unit 92 of the management device 9 specifies a transmission path corresponding to the measurement delay time based on the collected measurement delay time and the registered path delay information (step S13).
- the transmission path of the transmission path can be specified.
- the management device performs transmission corresponding to the measurement delay time based on the route delay information indicating the transmission delay time for each transmission route and the measurement delay time of the transmission path collected from the optical transmission / reception device of the optical transmission system. This is because the route is specified.
- the optical transmission / reception devices 3 and 4 of the optical transmission system include a plurality of optical transponders
- the management device 9 collects transmission delay times in the respective transmission paths from the plurality of optical transponders of the optical transmission / reception device 3.
- the transmission path of the transmission path is specified.
- FIG. 6 is a block diagram illustrating a configuration of a management apparatus and an optical transmission system according to the second embodiment.
- the second embodiment differences from the first embodiment will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.
- the optical transmission system of the second embodiment includes an optical transmission / reception device 33, an optical transmission / reception device 44, and a transmission path 10 that connects the optical transmission / reception device 33 and the optical transmission / reception device 44.
- the transmission line 10 between the optical transmission / reception device 33 and the optical transmission / reception device 44 is the same as the transmission line 10 of the first embodiment.
- FIG. 6 is a block diagram illustrating a configuration of the optical transmission / reception apparatus 33 of the optical transmission system according to the second embodiment.
- the optical transmission / reception apparatus 33 of the optical transmission system includes an optical transponder 5 and a wavelength multiplexing / demultiplexing unit 6 that wavelength-multiplexes / demultiplexes an optical signal.
- a plurality of optical transponders 5 that transmit and receive optical signals are provided for each wavelength channel.
- FIG. 7 is a block diagram showing the configuration of the optical transponder of the second embodiment. As shown in FIG. 7, it is assumed that the optical transponders 5 and 7 of the optical transceivers 33 and 44 of the second embodiment transmit and receive optical signals of different wavelength channels. Other than that, the configuration of the optical transponders 5 and 7 of the second embodiment is the same as the configuration of the optical transponder 5 of the first embodiment. It is assumed that the optical transponders 5 and 7 of the optical transmission / reception devices 33 and 44 can communicate with the management device 9.
- the plurality of optical transponders 5 output optical signals having different wavelengths.
- the wavelength demultiplexing unit 6 wavelength-multiplexes the optical signals output from the plurality of optical transponders 5 and transmits the optical signals to the transmission line 10.
- the wavelength demultiplexing unit 8 of the optical transmitter / receiver 44 wavelength-separates the optical signal that has passed through the transmission line 10, and each optical transponder 7 receives the wavelength-separated optical signal.
- Each optical transponder 5 of the optical transmission / reception device 33 of the second embodiment has the same function as the optical transponder 5 of the optical transmission / reception device 3 of the first embodiment. That is, each optical transponder 5 of the optical transmission / reception device 33 transmits an optical signal to which the measurement information is added to the optical transmission / reception device 44, and the optical information to which the measurement information transmitted from each optical transponder 7 of the optical transmission / reception device 44 is added. Receive a signal. Each optical transponder 5 acquires the transmission delay time of the transmission path based on the measurement information added to the received optical signal.
- the configuration of the management device 9 of the second embodiment is the same as that of the management device 9 of the first embodiment in that it includes a collection unit 91 and a specification unit 92 as shown in FIG. A detailed description of the configuration of the management device 9 of the second embodiment will be omitted.
- the management device 9 according to the second embodiment can communicate with each optical transponder 5 of the optical transceiver 33 and can collect the measurement delay time of the transmission path from the desired optical transponder 5 among the plurality of optical transponders 5. This is different from the management device 9 of the first embodiment.
- the operation of the management device 9 of the second embodiment will be described.
- the operation of the management apparatus 9 of the first embodiment (the flowchart of FIG. 5) can be applied to the operation of the management apparatus 9 of the second embodiment.
- the management apparatus 9 of the second embodiment registers the transmission delay time for each transmission path of the transmission path 10 between the optical transmission / reception apparatuses 33 and 44 in a storage unit (not shown) as path delay information ( Step S11).
- the management device 9 collects the transmission delay time of the transmission path of the transmission path 10 from the optical transponder 5 as the measurement delay time (step S12). At this time, the management device 9 of the second embodiment can collect the measurement delay time that is the transmission delay time of the transmission path from the desired optical transponder 5 to the transmission path 10 among the plurality of optical transponders 5. And the management apparatus 9 specifies the transmission path
- each optical transponder 5 on the station X side measures the transmission delay time of the transmission path 10
- the present invention is not limited to this.
- each optical transponder 7 on the station Y side may have a function of measuring the transmission delay time of the transmission line 10.
- the collection unit 91 of the management device 9 collects the transmission delay time measured by each optical transponder 7.
- the transmission path of the transmission path can be specified even when communication with a device in the transmission path of the optical transmission system is not possible.
- the management device according to the second embodiment like the management device 9 according to the first embodiment, includes path delay information indicating the relationship between the transmission path and the transmission delay time corresponding to the transmission path, This is because the transmission path corresponding to the measurement delay time is specified based on the measurement delay time of the transmission path collected from the optical transmission / reception apparatus of the transmission system.
- the management device 9 of the second embodiment even when the optical transponder 5 of a certain wavelength channel of the optical transmission / reception device 33 fails and the transmission delay time of the transmission line 10 cannot be measured, another wavelength can be measured.
- the management apparatus can collect the measurement delay time by measuring the delay time of the transmission line 10 from the optical transponder 5 of the channel.
- the optical transmission / reception apparatus 33 according to the second embodiment can simultaneously measure transmission delay times using different wavelength channels by using the wavelength demultiplexing unit. For this reason, the management apparatus 9 can collect the measurement delay time without measuring the transmission delay time again with the optical transponder 5 of another wavelength channel after the failure of the optical transponder 5 of a certain wavelength channel. Can be shortened.
- the third embodiment is an example in which a function addition unit is added on the transmission line 10 of the optical transmission system of the second embodiment.
- FIG. 8 is a block diagram illustrating a configuration of a management apparatus and an optical transmission system according to the third embodiment.
- the optical transmission system of the third embodiment has a configuration in which a function adding unit 31 and a function adding unit 32 are added on paths A and B of the transmission path 10 of the second embodiment, respectively.
- the function adding unit 31 and the function adding unit 32 are OADMs (Optical add-drop multiplexers) having different Add / Drop branching ratios.
- one of the function adding unit 31 and the function adding unit 32 functions as the path switching units 1 and 2 in the transmission path 10 switch the path.
- the function adding unit 31 may be installed at any place on the route A, and the function adding unit 32 on the route B is the same.
- the optical transponders 5 and 7 of the third embodiment have the same functions as the optical transponders 5 and 7 of the second embodiment. That is, the optical transponder 5 of the optical transmission / reception device 33 transmits the optical signal to which the measurement information is added to the optical transmission / reception device 44, and receives the optical signal to which the measurement information is added from the optical transponder 7 of the optical transmission / reception device 44. Then, the optical transponder 5 acquires the transmission delay time of the transmission path based on the measurement information added to the received optical signal.
- the optical signals output from the optical transponders 5 and 7 for measuring the transmission delay time are not dropped by the OADM and transmitted between the optical transceivers 33 and 44. Is a channel.
- the management apparatus 9 according to the third embodiment illustrated in FIG. 8 includes a collection unit 91 and a specification unit 92, similar to the management apparatus 9 illustrated in FIG.
- the management device 9 of the third embodiment can communicate with each optical transponder 5 of the optical transmission / reception device 33 in the same manner as the management device 9 of the second embodiment.
- the collection unit 91 of the management device 9 collects the measurement delay time that is the delay time of the transmission path measured by the optical transponder 5, and the specifying unit 92 includes the path delay information between the optical transmission / reception devices 33 and 44 registered in advance. Based on the collected measurement delay time, a transmission path corresponding to the measurement delay time is specified.
- the transmission path on the transmission line 10 is measured by measuring the transmission delay time between the optical transceivers 33 and 44. Can be specified.
- FIG. 9 is a block diagram illustrating a configuration of an optical transmission system according to a modification of the third embodiment.
- the optical transmission system according to the modification of the third embodiment includes an optical transmission / reception device 33, an optical transmission / reception device 44, and a function switching device 50.
- the function switching device 50 includes a path switching unit 51, a path switching unit 52, and a path AA and a path BB having different path lengths between the path switching units 51 and 52.
- the function addition units 53 and 54 are OADMs having different Add / Drop branching ratios.
- the optical transmission / reception device 33 and the path switching unit 51, and the path switching unit 52 and the optical transmission / reception device 44 are common transmission paths, and between the optical transmission / reception devices 33 and 44. There is no difference in the measured transmission delay time.
- the management apparatus 9 collects measurement delay times measured between the optical transmission / reception apparatuses, and between the optical transmission / reception apparatuses registered in advance.
- the transmission path in the function switching device 50 is specified based on the path delay information and the collected measurement delay time.
- the management apparatus 9 of the third embodiment shows path delay information indicating the relationship between the transmission path and the transmission delay time corresponding to the transmission path. This is because the transmission path corresponding to the measurement delay time is identified based on the measurement delay time of the transmission path collected from the optical transmission system.
- the management device 9 of the third embodiment it is also possible to specify the transmission path in the function switching device 50 installed between the optical transmission / reception devices of the optical transmission system.
- the reason is that the transmission path in the function switching device 50 is specified by using the difference in transmission delay time caused by the path length difference between the transmission paths in the function switching device 50.
- the fourth embodiment is an example in which the transmission path includes a plurality of transmission paths, and the transmission paths are configured by a combination of a plurality of path sections.
- the designed transmission delay time is obtained by using the designed path length in the transmission path of the optical transmission system and the propagation speed of the optical signal, and is used as the path delay information.
- the design transmission delay time can be obtained from, for example, the propagation speed of the optical signal propagating through the optical fiber and the length of the transmission path of the transmission path when the transmission path is composed of an optical fiber.
- FIG. 10 is a block diagram illustrating a configuration of a management apparatus and an optical transmission system according to the fourth embodiment.
- the optical transmission system according to the fourth embodiment includes an optical transmission / reception device 3, an optical transmission / reception device 4, and a transmission path 11.
- the optical transceivers 3 and 4 of the fourth embodiment are the same as the first optical transceivers 3 and 4.
- Route switching units 12, 13, 14, and 15 are installed on the transmission path 11 of the optical transmission system of the fourth embodiment.
- the transmission path 11 has eight individual paths C, D, E, F, G, H, I, and J. Note that the path switching functions of the path switching units 12, 13, 14, and 15 are the same.
- FIG. 11 is a table showing individual paths constituting the transmission path 11 of the fourth embodiment and their transmission delay times.
- Each transmission delay time of paths C to J shown in FIG. 11 represents a designed transmission delay time in the round trip of the individual path.
- the transmission delay time in the design of each transmission path preferably includes the transmission delay time in the path switching units 12 to 15 in addition to the transmission delay time of the individual path.
- the fourth embodiment will be described with the transmission delay time in the path switching unit omitted.
- FIG. 12 is a table showing route delay information in the transmission path of the fourth embodiment.
- the path delay information shown in FIG. 12 includes a transmission path, its path configuration, and a total delay time corresponding to the transmission path.
- the optical signal travels in the forward direction between the optical transmitting and receiving apparatuses in both the forward path and the return path. That is, in the forward path from the optical transmission / reception device 3 to the optical transmission / reception device 4, the optical signal that has reached the route switching unit 14 via the route E from the route switching unit 12 passes through the route I instead of the route H. Go to the optical transceiver 4.
- the transmission path reciprocates following the same path configuration on the forward path and the return path.
- the forward path of the transmission path 4-1 is the path C-path E-path I
- the return path also follows the path C-path E-path I.
- the total delay time in the transmission path is the total of the transmission delay times of the paths constituting the transmission path.
- the total delay times of the transmission paths 4-1 to 4-4 are different from each other.
- the relationship of the total delay times of the transmission paths 4-1 to 4-4 is L1 + L3 + L7 ⁇ L1 + L5 + L8 ⁇ L2 + L4 + L8 ⁇ L2 + L6 + L7.
- the collection unit 91 of the management apparatus 9 acquires path delay information corresponding to the transmission path of the transmission path 11 from an external apparatus (not shown) and registers it in the storage unit (not shown) of the management apparatus 9.
- the path delay information acquired by the collection unit 91 is path delay information on the design of the transmission path of the optical transmission system shown in FIG.
- the management apparatus 9 identifies the transmission path of the optical transmission system.
- the collection unit 91 of the management device 9 instructs the optical transmission / reception device 3 to measure the transmission delay time.
- the optical transponder 5 of the optical transmission / reception device 3 transmits an optical signal to which the measurement information is added with the optical transmission / reception device 4 as a destination, and is returned from the optical transponder 7 of the optical transmission / reception device 4.
- An optical signal to which measurement information is added is received.
- the optical transponder 5 measures the transmission delay time of the transmission path based on the measurement information added to the received optical signal.
- the collection unit 91 of the management device 9 collects the measurement delay time that is the delay time measured by the optical transponder 5, and the specifying unit 92 stores the collected measurement delay time and the storage unit (not shown) of the management device 9. Based on the registered path delay information shown in FIG. 12, the transmission path corresponding to the measurement delay time is specified.
- the collection unit 91 of the management apparatus 9 acquires path delay information from an external apparatus (not shown) before communication with the path switching units 12 to 15 on the transmission path 11 becomes impossible.
- the present invention is not limited to this. If the route delay information is designed, the route delay information can be acquired from an external device (not shown) even after communication with the route switching units 12 to 15 becomes impossible.
- a configuration may be adopted in which path delay information is collected from a plurality of optical transponders using the optical transceivers 33 and 44 instead of the optical transceivers 3 and 4. .
- the transmission path of the transmission path can be specified even when communication with a device in the transmission path of the optical transmission system is impossible.
- the management device according to the fourth embodiment performs measurement based on the route delay information indicating the transmission delay time for each transmission route and the measurement delay time of the transmission line collected from the optical transmission / reception device of the optical transmission system. This is because the transmission path corresponding to the delay time is specified.
- the management apparatus of the fourth embodiment it is possible to register the path delay information of the transmission path in the optical transmission system even after communication with the devices in the transmission path of the optical transmission system is disabled. This is because the path delay information based on the transmission path and the transmission delay time in the design of the transmission path of the optical transmission system is registered.
- FIG. 13 is a block diagram illustrating a configuration of an optical transmission system according to the fifth embodiment.
- the same components as those of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the optical transmission system of the fifth embodiment includes an optical transmission / reception device 33 installed in the office building X, an optical transmission / reception device 44 installed in the office building Y, and a transmission path that connects the optical transmission / reception devices 33 and 44.
- An OADM 56 is installed on the transmission line, and paths P and Q are formed by a path switching unit (not shown) between the optical transceiver 33 and the OADM 56, and a path switching unit (not shown) between the optical transceiver 44 and the OADM 56.
- paths P and Q are formed.
- the path configuration is such that two redundant paths of the path P and the path Q are installed on the transmission path with the OADM 56 as a boundary.
- the transmission path of the optical transmission system according to the fifth embodiment has four transmission paths depending on the combination of the path P and the path Q between the station X and the station Y (between the optical transceivers 33 and 44).
- the transmission delay time of the route P is the same between the offices X and OADM 56 and between the OADM 56 and the office Y
- the transmission delay time of the route Q is the same between the offices X and OADM 56 and between the OADM 56 and the office Y.
- the OADM 56 branches the optical signals of some wavelength channels output from the optical transceiver 33 in the office X to the optical transceiver 88 in the office Z, and is output from the optical transceiver 88 in the office Z. It has a function of inserting an optical signal of the wavelength channel and sending it to the optical transceiver 33.
- the optical transmission / reception device 33 in the station X can communicate with the optical transmission / reception device 44 in the station Y and the optical transmission / reception device 88 in the station Z.
- the station building Z (optical transceiver 88) is installed close to the OADM 56, and between the stations X and Z (between the optical transceivers 33 and 88).
- the transmission delay time is treated as the transmission delay time between the station X and the OADM 56.
- the management device 9 of the fifth embodiment is connected to the optical transmission / reception device 33 of the station X, and includes a collection unit 91 and a specification unit 92 as in the second embodiment.
- the collection unit 91 of the management device 9 registers the path delay information in a storage unit (not shown) of the management device 9.
- the path delay information includes four pieces of information between the stations X and Y (between the optical transmission / reception apparatuses 33 and 44) collected by the collection unit 91 of the management apparatus 9 from the optical transponder 5 of the optical transmission / reception apparatus 3 before the operation of the optical transmission system starts. It includes the transmission path (transmission paths 5-1 to 5-4) and its transmission delay time. Further, the path delay information includes a transmission delay time between the stations X and Z (between the optical transceivers 33 and 88).
- the collection unit 91 of the management apparatus 9 instructs the optical transponder 5 of the optical transmission / reception apparatus 33 to measure the transmission delay time between the station X and the station Y and between the station X and the station Z. After measuring the transmission delay time between the office X and the office Y and between the office X and the office Z by the optical transponder 5, the collecting unit 91 performs the operation between the office X and the office Y, and the office X And collect the measurement delay time between station Z.
- FIG. 14 is a table showing path delay information of a transmission line in the optical transmission system according to the fifth embodiment.
- the transmission paths 5-1 to 5-4 are a redundant path between the office X and OADM (path P, path Q) and a redundant path between the office Y and OADM (path P, path Q). It is composed of a combination of
- the specifying unit 92 can specify the transmission path in the same manner as the management device 9 of the second embodiment.
- the transmission path 5-2 and the transmission path 5-3 are different transmission paths, the transmission delay time between the stations X and Y (between the optical transceivers 33 and 44) is the same. For this reason, it is impossible to specify the transmission path 5-2 or the transmission path 5-3 only by the measurement delay time between the stations X and Y.
- the specifying unit 92 includes path delay information including the transmission delay time between the stations X and Z (between the station X and the OADM); The transmission path is specified based on the collected measurement delay time between the stations X and Z (between the stations X and OADM).
- the identifying unit 92 determines between the stations X and Z (stations X and OADM included in the path delay information). Therefore, the transmission path between the stations X and Y is identified as the transmission path 5-2.
- the transmission path of the transmission path can be specified even when communication with a device in the transmission path of the optical transmission system is impossible.
- the reason is that the management device performs transmission corresponding to the measurement delay time based on the route delay information indicating the transmission delay time for each transmission route and the measurement delay time of the transmission path collected from the optical transmission / reception device of the optical transmission system. This is because the route is specified.
- the management apparatus of the fifth embodiment it is possible to register the path delay information of the transmission path in the optical transmission system even after communication with the devices in the transmission path of the optical transmission system is disabled. This is because the path delay information based on the transmission path and the transmission delay time in the design of the transmission path of the optical transmission system is registered.
- the first embodiment is an example in which the round-trip delay time of the transmission path between the optical transceivers is the transmission delay time.
- the sixth embodiment is an example in which the one-way delay time of the transmission path between the optical transmitting and receiving apparatuses is used as the transmission delay time.
- the same configuration as the optical transmission system and management apparatus of the first embodiment can be used as part of the configuration of the optical transmission system and management apparatus of the sixth embodiment. For this reason, in the description of the sixth embodiment, differences from the first embodiment will be mainly described, and the same configurations as those of the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted. To do.
- FIG. 15 is a block diagram illustrating a configuration of a management apparatus and an optical transmission system according to the sixth embodiment.
- the optical transmission system of the sixth embodiment is installed in a station X and has an optical transponder 55 and an optical transponder 77 installed in a station Y and has an optical transponder 77.
- the transmission path 10 which connects the apparatus 4, the optical transmission / reception apparatus 3, and the optical transmission / reception apparatus 4 is provided.
- the path switching unit 1 and the path switching unit 2 installed on the transmission path 10 form path redundant sections of the path A and the path B having different path lengths.
- FIG. 16 is a table showing a path configuration between optical transceivers according to the sixth embodiment.
- the path from the optical transceiver 3 to the optical transceiver 4 is composed of a transmission path 6-1 configured by path X ⁇ path A ⁇ path Y and path X ⁇ path B ⁇ path Y.
- Transmission path 6-2 is a transmission path 6-1 configured by path X ⁇ path A ⁇ path Y and path X ⁇ path B ⁇ path Y.
- the optical transponder 55 and the optical transponder 77 of the sixth embodiment can be configured using the function of the optical transponder 5 of the first embodiment.
- the configuration of the optical transponder 5 of the first embodiment is applied to the optical transponder 55 on the transmission side and the optical transponder 77 on the reception side will be described.
- FIG. 17 is a block diagram showing the configuration of the optical transponder of the sixth embodiment.
- the optical transponder 55 of the optical transceiver 3 illustrated in FIG. 17 includes a signal generation unit 20, an information addition unit 21, an optical modulation unit 22, and an information management unit 26.
- the optical transponder 77 of the optical transceiver 4 includes a light receiving unit 23, an information extracting unit 24, a signal restoring unit 25, and an information managing unit 26.
- the management device 9 is connected to the optical transponders 55 and 77, respectively.
- the signal generation unit 20 of the optical transponder 55 on the transmission side generates a main signal, and the information addition unit 21 adds the measurement information generated by the information management unit 26 to the main signal.
- the optical modulation unit 22 converts the main signal to which the measurement information is added into an optical signal and transmits the optical signal to the transmission line 10.
- the light receiving unit 23 of the optical transponder 77 on the receiving side receives the optical signal transmitted from the optical transmitter / receiver 3, and the signal restoration unit 25 restores the received optical signal. Further, the information extraction unit 24 extracts measurement information from the received main signal and sends the measurement information to the information management unit 26 together with the extraction time at which the measurement information is extracted.
- the information management unit 26 on the reception side acquires the transmission delay time based on the measurement information time and the extraction time. For example, when the measurement information is time information, the transmission delay time can be measured using the time included in the time information and the extraction time at which the information management unit 26 extracted the measurement information.
- the information management unit 26 transmits the measured transmission delay time to the management device 9.
- the optical transmission / reception device 4 acquires information on the time difference from the optical transmission / reception device 3 from the management device 9.
- the information management unit 26 of the optical transponder 77 uses the time difference information with the optical transmission / reception device 3 to correct the time of the measurement information to the time of the place where the optical transmission / reception device 4 is installed.
- the information management unit 26 measures the forward delay time of the transmission path based on the corrected time and the extraction time.
- the management device 9 includes a collection unit 91 and a specification unit 92. Further, it is assumed that the management device 9 can communicate with the optical transponder 77 of the optical transmission / reception device 4.
- the collection unit 91 of the management device 9 communicates with the optical transponder 77 and collects the measurement delay time that is the delay time acquired by the information management unit 26 of the optical transponder 77.
- the collection unit 91 stores information related to the collected measurement delay time in a storage unit (not shown).
- the management device 9 can communicate with the optical transmission / reception device 4, the optical transmission / reception device 4 acquires the measurement delay time from the optical transponder 7, and the management device 9 collects the measurement delay time from the optical transmission / reception device 4. It is good.
- FIG. 18 is a table showing the relationship between the transmission delay time measured by the optical transponder and the path in the sixth embodiment.
- the table of FIG. 18 shows the route name, route configuration, and transmission delay time.
- the transmission delay time shown in FIG. 18 is measured in one way of the transmission path from the optical transceiver 3 to the optical transceiver 4.
- the transmission delay time measured by the information management unit 26 of the optical transponder 7 changes according to the path length of the transmission path. As shown in FIG. 15, when the route length of the route A is shorter than the route length of the route B, the relationship between the transmission delay times in the transmission route 6-1 and the transmission route 6-2 is LAA (microseconds to milliseconds). ⁇ LBB (microseconds to milliseconds).
- the collection unit 91 of the management device 9 acquires the transmission delay time from the optical transmission / reception device 3 and the optical transmission / reception device 4 through the transmission path forward (one way). Instruct. When there is a time difference between the installation locations of the optical transmission / reception device 3 and the optical transmission / reception device, the collection unit 91 of the management device 9 transmits time difference information between the optical transmission / reception device 3 and the optical transmission / reception device 4 to the optical transmission / reception device 4.
- the optical transponder 55 of the optical transmission / reception device 3 Upon receiving an instruction from the management device 9, the optical transponder 55 of the optical transmission / reception device 3 transmits an optical signal to which the measurement information is added to the transmission line 10 with the optical transmission / reception device 4 as a destination.
- the optical transponder 77 of the optical transceiver 4 receives the optical signal from the transmission line 10 and extracts measurement information.
- the optical transponder 77 acquires the transmission delay time from the time included in the measurement information and the extraction time of the measurement information in the optical transponder 77.
- the collection unit 91 of the management device 9 collects the measurement delay time that is the transmission delay time measured by the optical transponder 7, and the specifying unit 92 and the storage unit (not shown) of the collected measurement delay time and the management device 9
- the transmission path corresponding to the measurement delay time is specified based on the path delay information registered in (1).
- the specifying unit 92 is based on the transmission delay time (FIG. 18) for each transmission path registered in the storage unit (not shown).
- a transmission path between the optical transceivers 3 and 4 is identified as a transmission path 6-1.
- the management apparatus 9 can be applied even when communication with the path switching units 1 and 2 cannot be originally performed.
- the management device 9 can control the transmission path of the optical transmission system in the same way as the round-trip delay time even when the delay time of the transmission path of the optical transmission system is a one-way delay time.
- a transmission path can be specified.
- the collection unit 91 of the management device 9 instructs the optical transponders 55 and 77 of the optical transmission / reception devices 3 and 4 of the optical transmission system to acquire a plurality of transmission delay times. For example, the optical transponders 55 and 77 measure the transmission delay time at intervals of 10 minutes to obtain six transmission delay times. Next, the collection unit 91 collects six measurement delay times from the optical transponder 77.
- the specifying unit 92 specifies the corresponding transmission path for each of the collected six measurement delay times using the path delay information shown in FIG. When there is no transmission path corresponding to a plurality of measurement delay times, the specifying unit 92 identifies that the transmission path is not open.
- the collection unit 91 of the management device 9 collects a plurality of measurement delay times, and specifies transmission paths corresponding to the plurality of measurement delay times collected by the specification unit 92.
- the path state of the transmission path can be identified.
- the grasping of the path state of the management apparatus 9 has been described using the configuration of the sixth embodiment, but the present invention is also applicable to the transmission path of the optical transmission system described in the first to fifth embodiments. Can do.
- FIG. 19 is a diagram showing a hardware configuration in which the management device 9 in the first to sixth embodiments is realized by a computer device.
- each component of the management apparatus indicates a functional unit block.
- some or all of the components of the management apparatus are realized by an arbitrary combination of an information processing apparatus 60 and a program as shown in FIG.
- the information processing apparatus 60 includes the following configuration as an example.
- CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- a program 64 loaded into the RAM 63;
- a storage device 65 for storing the program 64;
- a drive device 67 for reading and writing the recording medium 66;
- a communication interface 68 connected to the communication network 69;
- An input / output interface 70 for inputting and outputting data; Bus 71 connecting each component
- Each component of the management device 9 is realized by the CPU 61 obtaining and executing a program 64 that realizes these functions.
- the program 64 for realizing the functions of the collection unit 91 and the specifying unit 92 of the management device 9 is stored in advance in the storage device 65 or the RAM 63, for example, and is read by the CPU 61 as necessary.
- the program 64 may be supplied to the CPU 61 via the communication network 69, or may be stored in advance in the recording medium 66, and the drive device 67 may read the program and supply it to the CPU 61.
- the management device 9 may be realized by an arbitrary combination of the information processing device 60 and a program.
- the collection unit 91 and the specification unit 92 of the management device 9 are realized by other general-purpose or dedicated circuits, processors, and the like or combinations thereof. These may be configured by a single chip or may be configured by a plurality of chips connected via a bus.
- a programmable logic device such as an FPGA (Field-Programmable Gate Array) may be used.
- the collection unit 91 and the specifying unit 92 of the management apparatus 9 may be realized by a combination of the above-described circuit and the like and a program.
- the functions of the collecting unit 91 and the specifying unit 92 of the management device 9 are realized by a plurality of information processing devices and circuits
- the plurality of information processing devices and circuits may be centrally arranged. It may be distributed.
- the information processing apparatus, the circuit, and the like may be realized as a form in which each is connected via a communication network, such as a client and server system and a cloud computing system.
- a management device for an optical transmission system having a transmission path having a different transmission path length for each transmission path between the first and second optical transceivers, A collection unit that pre-registers path delay information indicating a transmission delay time for each transmission path, and collects a measurement delay time that is a transmission delay time of the transmission path measured by the first optical transmission and reception device; And a specifying unit that specifies the transmission path corresponding to the measurement delay time based on the path delay information and the measurement delay time.
- the first optical transceiver includes a plurality of first optical transponders having different wavelength channels, The management device collects the measurement delay time measured by at least one of the first optical transponders; The management apparatus according to attachment 1.
- the transmission delay time of the path delay information is a transmission delay time for each of the transmission paths measured before the operation of the optical transmission system or during operation.
- the management device according to any one of appendices 1 to 3.
- the transmission delay time of the path delay information is a designed transmission delay time in the transmission path of the optical transmission system.
- the management device according to any one of appendices 1 to 3.
- the optical transmission system has a plurality of path switching units on the transmission path,
- the transmission path of the transmission path is composed of a combination of individual paths between the first optical transmission / reception device, the second optical transmission / reception device, and the plurality of path switching units,
- the path delay information includes the transmission path and its path configuration, and the total delay time for each transmission path,
- the total delay time is a sum of transmission delay times in the design of the individual paths.
- the management device according to attachment 5.
- the measurement delay time is a round trip delay time between the first and second optical transceivers.
- the management device according to any one of appendices 1 to 6.
- the management apparatus according to any one of appendices 1 to 7, wherein the optical transmission system includes a function addition unit in transmission.
- the function adding unit is an optical add / drop device;
- the management apparatus according to attachment 8. (Appendix 10) A method for identifying a transmission path of an optical transmission system having a transmission path having a different transmission path length for each transmission path between the first and second optical transceivers, Registering path delay information indicating a transmission delay time for each transmission path, collecting a measurement delay time that is a transmission delay time of the transmission path measured by the first optical transmission / reception apparatus, and measuring the path delay information and the measurement A specifying method for specifying a transmission path related to the measurement delay time based on the delay time.
- Appendix 11 A program for specifying a transmission path of an optical transmission system having a transmission path having a different transmission path length for each transmission path between the first and second optical transceivers, On the computer, Registering path delay information indicating a transmission delay time for each transmission path, collecting a measurement delay time that is a transmission delay time of the transmission path measured by the first optical transmission / reception apparatus, and measuring the path delay information and the measurement Identifying a transmission path related to the measurement delay time based on the delay time; A program that lets you do that.
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Abstract
Description
第1の実施形態によれば、光伝送システムの伝送路内の機器と通信できない場合でも、伝送路の伝送経路を特定することができる。その理由は、管理装置が、伝送経路ごとの伝送遅延時間を示す経路遅延情報と、光伝送システムの光送受信装置から収集した伝送路の測定遅延時間とに基づいて、測定遅延時間に対応した伝送経路を特定するからである。
次に、第2の実施形態に係る光伝送システム、管理装置について説明する。第2の実施形態は、光伝送システムの光送受信装置3、4が複数の光トランスポンダを備え、管理装置9は、光送受信装置3の複数の光トランスポンダからそれぞれの伝送路における伝送遅延時間を収集し、伝送路の伝送経路を特定する例である。
上記の第2の実施形態では、局舎X側の各光トランスポンダ5が伝送路10の伝送遅延時間を測定する例を示したが、これに限られない。例えば、局舎Y側の各光トランスポンダ7にも伝送路10の伝送遅延時間を測定する機能を持たせてもよい。この場合、管理装置9の収集部91は、各光トランスポンダ7が測定した伝送遅延時間を収集することになる。
第2の実施形態の管理装置によれば、光伝送システムの伝送路内の機器と通信できない場合でも、伝送路の伝送経路を特定することができる。その理由は、第2の実施形態の管理装置は、第1の実施形態の管理装置9と同様に、伝送経路と当該伝送経路に対応する伝送遅延時間との関係を示す経路遅延情報と、光伝送システムの光送受信装置から収集した伝送路の測定遅延時間とに基づいて、測定遅延時間に対応した伝送経路を特定するからである。
次に、第3の実施形態の管理装置、光伝送システムについて説明する。第3の実施形態は、第2の実施形態の光伝送システムの伝送路10上に機能付加部が追加された例である。
次に、第3の実施形態の変形例について説明する。第3の実施形態の変形例は、光送受信装置33、44間に機能切替装置50が設置され、機能切替装置50内の伝送経路が異なる経路長を有する例である。図9は、第3の実施形態の変形例における光伝送システムの構成を示すブロック図である。図9に示す第3の実施形態の変形例の構成の説明において、第3の実施形態と同じ構成には同じ符号を付して詳しい説明を省略する。図9に示すように、第3の実施形態の変形例における光伝送システムは、光送受信装置33、光送受信装置44、機能切替装置50を備える。機能切替装置50は、経路切替部51、経路切替部52、及び、経路切替部51、52間で経路長が異なる経路AA、経路BBを有する。例えば、機能付加部53、54は、Add/Drop分岐比がそれぞれ異なるOADMであるとする。経路切替部51、52が経路を切り替えることで、機能付加部53又は機能付加部54のいずれか一方が機能する。
第3の実施形態の管理装置によれば、伝送路の伝送経路上に機能付加部が設けられた光伝送システムにおいて、光伝送システムの伝送路内の機器と通信できない場合でも、伝送路の伝送経路を特定することができる。その理由は、第3の実施形態の管理装置9は、第1、2の実施形態の管理装置9と同様に、伝送経路と当該伝送経路に対応する伝送遅延時間との関係を示す経路遅延情報と、光伝送システムから収集した伝送路の測定遅延時間とに基づいて、測定遅延時間に対応した伝送経路を特定するからである。
次に、第4の実施形態に係る管理装置、及び、光伝送システムについて説明する。第4の実施形態は、伝送路が複数の伝送経路を含み、その伝送経路は、複数の経路区間の組合せで構成された例である。
上記の第4の実施形態において、管理装置9の収集部91は、伝送路11上の経路切替部12~15と通信できない状況となる前に経路遅延情報を外部装置(図示せず)から取得する例で説明したが、これに限られない。設計上の経路遅延情報であれば、経路切替部12~15と通信できない状況となった後でも経路遅延情報を外部装置(図示せず)から取得することができる。
第4の実施形態の管理装置によれば、光伝送システムの伝送路内の機器と通信できない場合でも、伝送路の伝送経路を特定することができる。その理由は、第4の実施形態の管理装置は、伝送経路ごとの伝送遅延時間を示す経路遅延情報と、光伝送システムの光送受信装置から収集した伝送路の測定遅延時間とに基づいて、測定遅延時間に対応した伝送経路を特定するからである。
次に、第5の実施形態に係る管理装置、光伝送システムについて説明する。図13は、第5の実施形態における光伝送システムの構成を示すブロック図である。図13に示す第5の実施形態の管理装置、光伝送システムにおいて、第2の実施形態と同様の構成は同じ符号を付して詳細な説明は省略する。
第5の実施形態の管理装置によれば、光伝送システムの伝送路内の機器と通信できない場合でも、伝送路の伝送経路を特定することができる。その理由は、管理装置は、伝送経路ごとの伝送遅延時間を示す経路遅延情報と、光伝送システムの光送受信装置から収集した伝送路の測定遅延時間とに基づいて、測定遅延時間に対応した伝送経路を特定するからである。
第1の実施形態は、光送受信装置間における伝送路の往復遅延時間を伝送遅延時間とする例であった。第6の実施形態は、光送受信装置間における伝送路の片道遅延時間を伝送遅延時間とする例である。
次に、第6の実施形態の管理装置9による光伝送システムの伝送経路の特定について説明する。伝送経路の特定は、第1の実施形態と同様、管理装置9が、光伝送システムの伝送路10上に設置された経路切替部1、経路切替部2と通信できない状況で実施される。なお、管理装置9は、経路切替部1、2と通信ができなくなる前に図18に示す伝送経路ごとの伝送遅延時間を取得して記憶部(図示せず)に登録済みであるとする。
光伝送システムの伝送路における経路状態の把握について、第6の実施形態の構成を用いて説明する。図15に示す光伝送システムにおいて、伝送路10上に設置された経路切替部1が管理装置9の指示によらず自律的に経路A、経路Bを切替える機能を有するとする。また、管理装置9は、図18に示す経路遅延情報を記憶部(図示せず)に登録済みであるとする。
第1の実施形態~第6の実施形態については、それぞれを組み合わせた態様であってよい。第1~第6の実施形態に記載された伝送路10、11の例としてファイバおよび光中継器を有する例を説明したが、これに限られない。例えば、伝送路10上に光中継器が設置されない伝送路にも適用できる。
(ハードウエア構成)
図19は、第1~6の実施形態における管理装置9をコンピュータ装置で実現したハードウエア構成を示す図である。
CPU(Central Processing Unit)61、
ROM(Read Only Memory)62、
RAM(Random Access Memory)63、
RAM63にロードされるプログラム64、
プログラム64を格納する記憶装置65、
記録媒体66の読み書きを行うドライブ装置67、
通信ネットワーク69と接続する通信インターフェース68、
データの入出力を行う入出力インターフェース70、
各構成要素を接続するバス71
管理装置9の各構成要素は、これらの機能を実現するプログラム64をCPU61が取得して実行することで実現される。管理装置9の収集部91、特定部92の機能を実現するプログラム64は、例えば、予め記憶装置65又はRAM63に格納されており、必要に応じてCPU61が読み出す。なお、プログラム64は、通信ネットワーク69を介してCPU61に供給されてもよいし、予め記録媒体66に格納されており、ドライブ装置67が当該プログラムを読み出してCPU61に供給してもよい。
(付記1)
第1、第2の光送受信装置間の伝送経路ごとに伝送経路長が異なる伝送路を有する光伝送システムの管理装置であって、
前記伝送経路ごとの伝送遅延時間を示す経路遅延情報を予め登録し、前記第1の光送受信装置が測定した前記伝送路の伝送遅延時間である測定遅延時間を収集する収集部と、
前記経路遅延情報及び前記測定遅延時間に基づいて、前記測定遅延時間に対応する前記伝送経路を特定する特定部と、を備える管理装置。
(付記2)
前記第1の光送受信装置は、波長チャネルが異なる複数の第1の光トランスポンダを有し、
前記管理装置は、前記第1の光トランスポンダの少なくとも1つが測定した前記測定遅延時間を収集する、
付記1に記載の管理装置。
(付記3)
前記収集部は、前記第1の光送受信装置に前記伝送路の伝送遅延時間の測定を指示する、付記1又は2に記載の管理装置。
(付記4)
前記経路遅延情報の伝送遅延時間は、前記光伝送システムの運用開始前、又は、運用中に測定された前記伝送経路ごとの伝送遅延時間である、
付記1から3のいずれか1つに記載の管理装置。
(付記5)
前記経路遅延情報の伝送遅延時間は、前記光伝送システムの伝送路における設計上の伝送遅延時間である、
付記1から3のいずれか1つに記載の管理装置。
(付記6)
前記光伝送システムは、前記伝送路上に複数の経路切替部を有し、
前記伝送路の伝送経路は、前記第1の光送受信装置、前記第2の光送受信装置、前記複数の経路切替部との間の個別経路の組合せで構成され、
前記経路遅延情報は、前記伝送経路とその経路構成、及び、前記伝送経路ごとの前記合計遅延時間を含み、
前記合計遅延時間は、前記個別経路の設計上の伝送遅延時間の合計である、
付記5に記載の管理装置。
(付記7)
前記測定遅延時間は、第1、第2の光送受信装置間の往復遅延時間である、
付記1から6のいずれか1つに記載の管理装置。
(付記8)
前記光伝送システムは、伝送経上に機能付加部を備える
付記1から7のいずれか1つに記載の管理装置。
(付記9)
前記機能付加部が、光挿入分岐装置である、
付記8に記載の管理装置。
(付記10)
第1、第2の光送受信装置間の伝送経路ごとに伝送経路長が異なる伝送路を有する光伝送システムの伝送経路の特定方法であって、
前記伝送経路ごとの伝送遅延時間を示す経路遅延情報を登録し、前記第1の光送受信装置が測定した前記伝送路の伝送遅延時間である測定遅延時間を収集し、前記経路遅延情報及び前記測定遅延時間に基づいて、前記測定遅延時間に関連する伝送経路を特定する特定方法。
(付記11)
第1、第2の光送受信装置間の伝送経路ごとに伝送経路長が異なる伝送路を有する光伝送システムの伝送経路を特定するプログラムであって、
コンピュータに、
前記伝送経路ごとの伝送遅延時間を示す経路遅延情報を登録し、前記第1の光送受信装置が測定した前記伝送路の伝送遅延時間である測定遅延時間を収集し、前記経路遅延情報及び前記測定遅延時間に基づいて、前記測定遅延時間に関連する伝送経路を特定する、
ことを実行させるプログラム。
3、4、33、44、88 光送受信装置
5、7、55、77 光トランスポンダ
6、8 波長多重分離部
9 管理装置
10、11 伝送路
12、13、14、15 経路切替部
20 信号生成部
21 情報付加部
22 光変調部
23 受光部
24 情報抽出部
25 信号復元部
26 情報管理部
31、32、53、54 機能付加部
50 機能切替装置
56 OADM
60 情報処理装置
61 CPU
63 RAM
64 プログラム
65 記憶装置
66 記録媒体
67 ドライブ装置
68 通信インターフェース
69 通信ネットワーク
70 入出力インターフェース
71 バス
91 収集部
92 特定部
Claims (10)
- 第1、第2の光送受信装置間の伝送経路ごとに伝送経路長が異なる伝送路を有する光伝送システムの管理装置であって、
前記伝送経路ごとの伝送遅延時間を示す経路遅延情報を予め登録し、前記第1の光送受信装置が測定した前記伝送路の伝送遅延時間である測定遅延時間を収集する収集手段と、
前記経路遅延情報及び前記測定遅延時間に基づいて、前記測定遅延時間に対応する前記伝送経路を特定する特定手段と、を備える管理装置。 - 前記第1の光送受信装置は、波長チャネルが異なる複数の光トランスポンダを有し、
前記管理装置は、前記光トランスポンダの少なくとも1つが測定した前記測定遅延時間を収集する、請求項1に記載の管理装置。 - 前記収集手段は、前記第1の光送受信装置に前記伝送路の伝送遅延時間の測定を指示する、
請求項1又は2に記載の管理装置。 - 前記経路遅延情報の伝送遅延時間は、前記光伝送システムの運用開始前、又は、運用中に測定された前記伝送経路ごとの伝送遅延時間である、
請求項1から3のいずれか1つに記載の管理装置。 - 前記経路遅延情報の伝送遅延時間は、前記光伝送システムの伝送路における設計上の伝送遅延時間である、
請求項1から3のいずれか1つに記載の管理装置。 - 前記光伝送システムは、前記伝送路上に複数の経路切替手段を有し、
前記伝送路の伝送経路は、前記第1の光送受信装置、前記第2の光送受信装置、前記複数の経路切替手段との間の個別経路の組合せで構成され、
前記経路遅延情報は、前記伝送経路とその経路構成、及び、前記伝送経路ごとの前記合計遅延時間を含み、
前記合計遅延時間は、前記伝送経路を構成する前記個別経路の設計上の伝送遅延時間の合計である、
請求項5に記載の管理装置。 - 前記測定遅延時間は、第1、第2の光送受信装置間の往復遅延時間である、
請求項1から6のいずれか1つに記載の管理装置。 - 前記光伝送システムは、伝送経上に機能付加手段を備える、請求項1から7のいずれか1つに記載の管理装置。
- 第1、第2の光送受信装置間の伝送経路ごとに伝送経路長が異なる伝送路を有する光伝送システムの伝送経路の特定方法であって、
前記伝送経路ごとの伝送遅延時間を示す経路遅延情報を登録し、前記第1の光送受信装置が測定した前記伝送路の伝送遅延時間である測定遅延時間を収集し、前記経路遅延情報及び前記測定遅延時間に基づいて、前記測定遅延時間に関連する伝送経路を特定する特定方法。 - 第1、第2の光送受信装置間の伝送経路ごとに伝送経路長が異なる伝送路を有する光伝送システムの伝送経路を特定するプログラムを格納した記録媒体であって、
コンピュータに、
前記伝送経路ごとの伝送遅延時間を示す経路遅延情報を登録し、前記第1の光送受信装置が測定した前記伝送路の伝送遅延時間である測定遅延時間を収集し、前記経路遅延情報及び前記測定遅延時間に基づいて、前記測定遅延時間に関連する伝送経路を特定する、
ことを実行させるプログラムを格納した記録媒体。
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WO2024004080A1 (ja) * | 2022-06-29 | 2024-01-04 | 日本電信電話株式会社 | 遅延情報収集装置、遅延制御システム、遅延情報収集方法及びプログラム |
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WO2021060124A1 (ja) | 2019-09-27 | 2021-04-01 | 日本電気株式会社 | 光通信システム、光通信装置、光通信方法及び記憶媒体 |
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