Evaluation device and evaluation method

Abstract

An evaluation device 4 comprises: a monitoring unit 41 which measures a state of an optical signal input from a transponder to a ROADM device; and an evaluation unit 42 which evaluates the normality of the optical signal from the transponder by comparing the measured state thereof with a preset optical signal state.

Description

Determination device and determination method

[0001] The present disclosure relates to a determination device and a determination method.

[0002] To improve the reliability and flexibility of networks, CDC (Colorless, Directionless, and Contentionless) technology is used in transmission equipment. To realize CDC technology, key devices such as WSS (Wavelength Selective Switch) and multicast switch are used in the multiplexing / demultiplexing section of ROADM (Reconfigurable Optical Add / Drop Multiplexer) equipment.

[0003] As transmission equipment becomes more open, the practical use of a usage model in which ROADM equipment and transponders are managed by separate users is being considered.

[0004] Suzuki and four others, "C+L-band CDC-ROADM for achieving high-capacity network flexibility," NTT, [online], [Retrieved July 10, 2024], <URL: https: / / www.rd.ntt / research / JN202206_18480.html>

[0005] If the above usage scenario is put into practical use, there is a concern that the configuration information between the ROADM device and the transponder may diverge. For example, if there is an error in the signal information input from the transponder to the ROADM device, the ROADM device does not have a mechanism to detect the abnormal condition, and therefore cannot notify the user. Furthermore, if a misconfigured optical signal interferes with other optical signals, it will affect communication quality.

[0006] The present disclosure has been made in consideration of the above circumstances, and an object of the present disclosure is to provide a technology that can determine the normality of an optical signal input from a transponder to a ROADM device when the transponder is connected.

[0007] A determination device according to one embodiment of the present disclosure includes a monitoring unit that measures the state of an optical signal input from a transponder to a ROADM device, and a determination unit that determines the normality of the optical signal from the transponder by comparing the measured state of the optical signal with a predetermined state of the optical signal.

[0008] A determination method according to one embodiment of the present disclosure is a determination method performed by a determination device, which measures the state of an optical signal input from a transponder to a ROADM device and determines the normality of the optical signal from the transponder by comparing the measured state of the optical signal with a predetermined state of the optical signal.

[0009] According to the present disclosure, it is possible to provide a technology capable of determining the normality of an optical signal input from a transponder to a ROADM device when the transponder is connected.

[0010] Fig. 1 is a diagram showing the configuration of an edge portion of an optical transmission system according to a first embodiment. Fig. 2 is a diagram showing a determination flow when a transponder is newly installed. Fig. 3 is a diagram showing a processing image when a transponder is newly installed. Fig. 4 is a diagram showing a determination flow when a ROADM device is newly installed. Fig. 5 is a diagram showing a processing image when a ROADM device is newly installed. Fig. 6 is a diagram showing the configuration of an edge portion of an optical transmission system according to a second embodiment.

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same parts are designated by the same reference numerals and the description thereof will be omitted.

[0012] 1 is a diagram showing the configuration of an edge portion of an optical transmission system according to a first embodiment. The optical transmission system according to this embodiment includes a ROADM device 1, a plurality of transponders 2, and an operation device 3.

[0013] The ROADM device 1 is a multiplexing device that adds and drops optical signals. The ROADM device 1 includes a path unit 11 configured with multiple optical fibers and a multiplexing / demultiplexing unit 12 that multiplexes and demultiplexes optical signals. The multiplexing / demultiplexing unit 12 is configured with, for example, a WSS or a multicast switch.

[0014] The transponder 2 is a relay device that is connected to the receiving port 121 of the multiplexing / demultiplexing unit 12 and outputs an optical signal to the receiving port 121 of the connection destination.

[0015] The operation device 3 is a control device that operates the ROADM device 1. The operation device 3 includes a setting unit 31. The setting unit 31 has a function of setting, for example, the transfer source (receiving port 121) and transfer destination (transmitting port 122) of an optical signal in the multiplexing / demultiplexing unit 12.

[0016] Conventionally, the ROADM device 1 and the transponder 2 have been managed by the same user or the same system. However, when they are managed by different users, the above-mentioned problems arise. Therefore, the optical transmission system according to this embodiment further includes a determination device 4.

[0017] The determination device 4 is constructed in the ROADM device 1, connected to the monitoring transmission port 122n provided in the multiplexing / branching unit 12, and is a device that determines the normality of the optical signal input from the transponder 2 to the ROADM device 1 when the transponder 2 is connected to the ROADM device 1.

[0018] The determination device 4 includes a monitoring unit 41 and a determination unit 42 .

[0019] The monitoring unit 41 has a function of receiving an optical signal input from the transponder 2 to the ROADM device 1 via the multiplexing / demultiplexing unit 12 and measuring the state of the received optical signal.

[0020] The determination unit 42 has a function of determining the normality (normal / abnormal) of the optical signal of the transponder 2 by comparing the state of the optical signal measured by the monitoring unit 41 with a preset state of the optical signal.

[0021] (Basic Operation) Next, the basic operation of the optical transmission system according to this embodiment will be described with reference to FIG.

[0022] The user configures the ROADM device 1 with a monitoring unit 41 for checking the normality of an optical signal input to the ROADM device 1. The user then designates one of the multiplexing / demultiplexing units 12 as a monitoring transmission port 122n, and connects the monitoring unit 41 to the monitoring transmission port 122n.

[0023] Next, the user newly connects the newly installed transponder 2b to the receiving port 121b of the multiplexing / demultiplexing unit 12. At this time, the setting unit 31 sets the transfer destination of the optical signal from the transponder 2b to the monitoring transmission port 122n so that the optical signal is guided to the monitoring unit 41 instead of the original transfer destination (e.g., the transmission port 122a).

[0024] Next, the monitoring unit 41 measures the state (for example, center wavelength, wavelength band, signal power, etc.) of the optical signal input from the transponder 2b, and notifies the determination unit 42 of the measurement result.

[0025] Next, the judgment unit 42 judges the normality of the measured optical signal by comparing the measurement results notified from the judgment unit 42 with the setting information (e.g., center wavelength, wavelength band, signal power, etc.) of the state of the optical signal that was generated in advance.

[0026] For example, if the multiplexing / demultiplexing unit 12 is a multicast switch, the determining unit 42 makes a determination based on the state of the arriving optical signal, and if it is a WSS, the determining unit 42 makes a determination based on whether or not an optical signal has arrived and the state of the arriving optical signal.

[0027] Finally, as a result of the normality determination, the setting unit 31 sets the receiving port 121b so that the optical signal from the transponder 2b is forwarded to the original destination (transmitting port 122a) if the normality is determined, and blocks the receiving port 121b to block the optical signal from the transponder 2b if the normality is determined.

[0028] (Method of Determining When a Transponder is Newly Installed) Next, a method of determining when a transponder is newly installed will be described with reference to FIGS. 2 and 3. FIG.

[0029] The first transponder 2a to the third transponder 2c are assumed to be already installed. The optical signal from the first transponder 2a is input to the first receiving port 121a of the multiplexing / demultiplexing unit 12 and transmitted from the first transmitting port 122a. The optical signal from the second transponder 2b is input to the second receiving port 121b of the multiplexing / demultiplexing unit 12 and transmitted from the first transmitting port 122a. The optical signal from the third transponder 2c is input to the third receiving port 121c of the multiplexing / demultiplexing unit 12 and transmitted from the second transmitting port 122b.

[0030] At this time, a new fourth transponder 2d is newly connected to the fourth receiving port 121d, and an optical signal from the fourth transponder 2d is transmitted from the second transmitting port 122b. When a new transponder is thus installed in an operating ROADM device 1, the optical signal input from the newly installed transponder is monitored to determine whether the optical signal is normal. This will be described in detail below.

[0031] The determination unit 42 reads the setting information and generates a determination condition (step S101).

[0032] Next, the setting unit 31 sets the transfer destination of the optical signal input from the fourth transponder 2d and received at the fourth reception port 121d to the monitoring transmission port 122n (step S102).

[0033] Next, the user connects the fourth transponder 2d to the fourth receiving port 121d (step S103).

[0034] Next, the monitoring unit 41 measures the state of the optical signal input from the fourth transponder 2d (step S104).

[0035] Next, the determination unit 42 determines the normality of the optical signal input from the fourth transponder 2d using the determination conditions generated in step S101 (step S105).

[0036] If the optical signal input from the fourth transponder 2d is abnormal, the determining unit 42 issues an alarm (step S106), and the setting unit 31 blocks the receiving port 121d (step S107).

[0037] If the optical signal input from the fourth transponder 2d is normal, the setting unit 31 sets the receiving port 121d so that the optical signal input from the fourth transponder 2d is forwarded to its original destination (the second transmitting port 122b) (step S108).

[0038] (Determination Method When Installing a New ROADM Device) Next, a determination method when installing a new ROADM device will be described with reference to FIGS.

[0039] Since the monitoring unit 41 can only measure one optical signal at a time, when multiple transponders 2 are newly connected at the same time, such as when a new ROADM device 1 is installed, the receiving ports of the ROADM device are blocked while the input optical signals are guided to the monitoring unit 41 one by one, and the optical signals are monitored and judged to be normal in sequence, thereby realizing judgment of the optical signals from multiple transponders. This will be described in detail below.

[0040] The determination unit 42 reads the setting information and generates a determination condition (step S201).

[0041] Next, the setting unit 31 blocks all of the first to fourth receiving ports 121a to 121d (step S202).

[0042] Next, the user connects the first to fourth transponders 2a to 2d to the first to fourth receiving ports 121a to 121d, respectively (step S203).

[0043] Next, the setting unit 31 sets the transfer destination of the optical signal input from the first transponder 2a and received at the first reception port 121a to the monitoring transmission port 122n (step S204).

[0044] Next, the setting unit 31 unblocks the first receiving port 121a (step S205).

[0045] Next, the monitoring unit 41 measures the state of the optical signal input from the first transponder 2a (step S206).

[0046] Next, the determining unit 42 determines the normality of the optical signal input from the first transponder 2a using the determination conditions generated in step S201 (step S207).

[0047] If the optical signal input from the first transponder 2a is abnormal, the determining unit 42 issues an alarm (step S208), and the setting unit 31 blocks the first receiving port 121a (step S209).

[0048] If the optical signal input from the first transponder 2a is normal, the setting unit 31 again blocks all of the first to fourth receiving ports 121a to 121d (step S210).

[0049] Thereafter, the setting unit 31 sets the transfer destination of the optical signal input from the second transponder 2b and received at the second reception port 121b to the monitoring transmission port 122n (step S211).

[0050] Thereafter, the setting unit 31 unblocks the second receiving port 121b (step S212).

[0051] Thereafter, the monitoring unit 41 measures the state of the optical signal input from the second transponder 2b (step S213).

[0052] Thereafter, the determining unit 42 determines the normality of the optical signal input from the second transponder 2b using the determination conditions generated in step S201 (step S214).

[0053] If the optical signal input from the second transponder 2b is abnormal, the process proceeds to step S208, the determining unit 42 issues an alarm, and the setting unit 31 blocks the second receiving port 121b.

[0054] If the optical signal input from the second transponder 2b is normal, steps S210 to S214 are repeatedly executed for the remaining third transponder 2c and fourth transponder 2d.

[0055] Finally, if all the optical signals input from the first transponder 2a to the fourth transponder 2d are normal, the setting unit 31 sets the first receiving port 121a to the fourth receiving port 121d, respectively, so that each optical signal input from the first transponder 2a to the fourth transponder 2d is forwarded to its original destination (step S215).

[0056] (Effect) According to this embodiment, the state of the optical signal input from the transponder 2 to the ROADM device 1 is measured, and the measured state of the optical signal is compared with the state of the optical signal set in advance to determine the normality of the optical signal from the transponder, thereby providing a technology that can determine the normality of the optical signal input to the ROADM device 1 when the transponder 2 is connected.

[0057] Second Embodiment FIG. 6 is a diagram showing the configuration of an edge portion of an optical transmission system according to a second embodiment.

[0058] The implementation of the monitoring unit 41 and the determining unit 42 is not limited to inside the ROADM device 1. In this embodiment, a case where the monitoring unit 41 and the determining unit 42 are implemented outside the ROADM device 1 will be described.

[0059] In this embodiment, a monitoring module 5 is connected between each transponder 2 and each receiving port 121 provided in the multiplexing / demultiplexing unit 12 of the ROADM device 1, and a monitoring unit 41 is constructed in the monitoring module 5. A determination unit 42 is constructed in the operation device 3. In addition to the setting unit 31, the operation device 3 further includes the determination unit 42 and a setting information DB 32.

[0060] (Basic Operation) The basic operation of the optical transmission system according to this embodiment will be described with reference to FIG.

[0061] The monitoring unit 41b of the monitoring module 5b measures the state of the optical signal input from the newly installed transponder 2b, and notifies the determination unit 42 of the operation device 3 of the measurement result.

[0062] The determination unit 42 of the operation device 3 recognizes the normal state of the optical signal by reading the setting information from the setting information DB 32, and determines the normality of the optical signal of the transponder 2b by comparing it with the notified measurement results.

[0063] As a result of determining normality, if the normality is determined, the setting unit 31 sets the receiving port 121b so that the optical signal from the transponder 2b is forwarded to the intended destination, and if the normality is determined, the setting unit 31 blocks the receiving port 121b and blocks the optical signal from the transponder 2b.

[0064] (Effect) Even in this embodiment, the state of the optical signal input from the transponder 2 to the ROADM device 1 is measured, and the measured state of the optical signal is compared with the state of the optical signal set in advance to determine the normality of the optical signal from the transponder, thereby providing a technology that can determine the normality of the optical signal input to the ROADM device 1 when the transponder 2 is connected.

[0065] Furthermore, in the case of this embodiment, the monitoring unit can be installed later where necessary, making it easier to install than the built-in method described in the first embodiment.

[0066] REFERENCE SIGNS LIST 1 ROADM device 11 Direction unit 12 Multiplexing / demultiplexing unit 121 Receiving port 122 Transmitting port 2 Transponder 3 Operation device 31 Setting unit 32 Setting information DB 4 Determination device 41 Monitoring unit 42 Determination unit 5 Monitoring module

Claims

1. A determination device comprising: a monitoring unit that measures the state of an optical signal input from a transponder to a ROADM device; and a determination unit that determines the normality of the optical signal from the transponder by comparing the measured state of the optical signal with a preset state of the optical signal.

2. A determination method performed by a determination device, the method comprising: measuring the state of an optical signal input from a transponder to a ROADM device; and determining the normality of the optical signal from the transponder by comparing the measured state of the optical signal with a predetermined state of the optical signal.

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