JP2023122698A - Information processing program, method of detecting location of anomaly, information processing apparatus, and communication system - Google Patents

Abstract

To provide an information processing program for detecting where an anomaly occurred in an optical communication network even if the anomaly may not cause a communication failure, a method of detecting location of an anomaly, an information processing apparatus, and a communication system.SOLUTION: An information processing program causes a computer to implement: an optical receiving strength information acquisition unit 31 which acquires optical receiving power information of an optical communication port 20 in each of multiple nodes 2; an operation mode switching unit 33 which switches operation modes of the nodes 2, between a non-bypass mode and a bypass mode in which optical signals are transmitted to an adjacent node 2 without using the optical communication port 20; and an anomaly location detection unit 34 which compares, when an operation node of one node 2 is set in the non-bypass mode and the bypass mode, optical receiving power information acquired from a node 2 adjacent to the one node 2, to detect where an anomaly occurred in an optical communication network 100 on the basis of a result of the comparison.SELECTED DRAWING: Figure 7

Description

TECHNICAL FIELD The present invention relates to an information processing program, an abnormal location detection method, an information processing apparatus, and a communication system.

Conventionally, there has been known a technique for detecting a communication abnormality in an optical communication network composed of a plurality of nodes. Patent document 1 describes this type of technology. Patent Literature 1 describes a technique for detecting an abnormality in an optical bypass switch based on a path configuration change signal of a node adjacent to a node to be diagnosed.

JP-A-10-65619

However, the technique of Patent Document 1 only detects an optical switch that cannot perform a normal switching operation, and detects a communication abnormality in a state where communication is not yet disabled, such as when the optical reception intensity of a node decreases. not configuration.

The present invention provides an information processing program, an abnormality detection method, an information processing apparatus, and a communication system that can detect an abnormality in an optical communication network even when a communication abnormality that does not disable communication occurs. intended to provide

The present invention provides, in an optical communication network, a reception intensity information acquiring unit for acquiring optical reception intensity information indicating the optical reception intensity of each of the optical communication ports of a plurality of nodes interconnected by the optical communication ports; The operation mode of each node is divided into a non-bypass mode in which optical signals are transmitted and received to and from the adjacent nodes via the optical communication ports, and a non-bypass mode in which optical signals are transmitted to the adjacent nodes without passing through the optical communication ports. an operation mode switching unit for switching between the bypass mode and the bypass mode, and when the operation mode of the one node is set to the non-bypass mode and the bypass mode, respectively, from the node adjacent to the one node The present invention relates to a program that causes a computer to implement an anomaly detection unit that compares acquired light reception intensity information and detects an anomaly in the optical communication network based on the comparison result.

The abnormal point detection unit determines that, in the nodes adjacent to the one node, received light intensity information when the one node is operated in the non-bypass mode is outside a predetermined reference range, and It may be determined that one of the nodes has an abnormality when the received light intensity information is within the reference range when the nodes are operated in the bypass mode.

The abnormal point detection unit sequentially switches the operation mode of each of the plurality of nodes between the non-bypass mode and the bypass mode, and obtains optical reception intensity information of other adjacent nodes; When the absolute value of the difference between the optical reception intensity information in the non-bypass mode and the bypass mode is the largest, it may be determined that the one node whose operation mode is switched has an abnormal location.

The abnormal point detection unit sequentially switches the operation mode of each of the plurality of nodes between the non-bypass mode and the bypass mode, and obtains optical reception intensity information of other adjacent nodes; It may be determined that an abnormal portion exists in the transmission line connecting the nodes when an absolute value of a difference between the optical reception intensity information in the non-bypass mode and the bypass mode is smaller than a predetermined threshold. .

The operation mode switching unit may switch the operation mode of the node determined to have the abnormal location by the abnormal location detection unit to the bypass mode.

The operation mode of the node is switched to the non-bypass mode by selecting the non-bypass mode communication path included in the node, and is switched to the bypass mode by selecting the bypass mode communication path. mode and the node includes a plurality of sets of communication paths for the non-bypass mode and the bypass mode, all of the communication paths for the non-bypass mode and the bypass mode in the node It may further include a first operation mode switching control unit that controls the operation of the operation mode switching unit so that the pair is simultaneously selected as the communication path for the non-bypass mode or the communication path for the bypass mode.

a second operation mode for controlling the operation of the operation mode switching unit so as to sequentially select one of the communication paths for the non-bypass mode and the bypass mode for a set of the plurality of communication paths in the node; A switching control unit may be further provided.

The present invention also provides a method for detecting an abnormal location executed by an information processing apparatus, comprising: an optical communication network; a reception intensity information acquiring step of acquiring reception intensity information; an operation mode of each of the plurality of nodes; an operation mode switching step of switching between a bypass mode in which an optical signal is transmitted to the adjacent node without passing through a communication port, and an operation mode switching step of switching the operation mode of one of the nodes to each of the non-bypass mode and the bypass mode; an anomaly point detection step of comparing received light intensity information acquired from the nodes adjacent to one of the nodes and detecting an anomaly point in the optical communication network based on the comparison result. The present invention relates to a method for detecting abnormal locations including.

Further, in an optical communication network, the present invention provides an optical reception intensity information acquisition unit for acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port of each of a plurality of nodes interconnected by an optical communication port; a non-bypass mode in which optical signals are transmitted to and received from adjacent nodes via the optical communication ports; and an optical signal transmission mode to the adjacent nodes without passing through the optical communication ports. an operation mode switching unit that switches to either a bypass mode to be transmitted; The present invention relates to an information processing apparatus comprising: an anomaly detection unit that compares received light intensity information acquired from nodes and detects an anomaly in the optical communication network based on the comparison result.

According to another aspect of the present invention, an optical communication network includes a plurality of nodes interconnected by optical communication ports, and an information processing device for controlling the operation of the plurality of nodes, wherein the information processing device comprises the plurality of nodes. an optical reception intensity information acquisition unit for acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port of each node; an operation mode switching unit for switching between a non-bypass mode in which an optical signal is transmitted and received between and a bypass mode in which an optical signal is transmitted to the adjacent node without passing through the optical communication port; When the operation modes of the nodes are set to the non-bypass mode and the bypass mode, the received light intensity information obtained from the nodes adjacent to one of the nodes is compared, and the light intensity information is compared based on the comparison result. The present invention relates to a communication system having an abnormal point detection unit that detects an abnormal point in a communication network.

According to the present invention, it is possible to detect an abnormal location in an optical communication network even when a communication abnormality that does not disable communication occurs.

1 is a schematic diagram showing a communication system according to an embodiment of the invention; FIG. 4 is a schematic diagram showing the internal structure of a node in non-bypass mode in the communication system according to one embodiment of the present invention; FIG. 4 is a schematic diagram showing the internal structure of a node in bypass mode in the communication system according to one embodiment of the present invention; FIG. 1 is a functional block diagram of a node of a communication system according to one embodiment of the present invention; FIG. 1 is a schematic diagram illustrating a communication system in which an operation mode of one node of the communication system is set to bypass mode according to an embodiment of the present invention; FIG. 3 is a block diagram showing the hardware configuration of a management server of the communication system according to one embodiment of the present invention; FIG. 4 is a functional block diagram of a management server of the communication system according to one embodiment of the present invention; FIG. FIG. 3 is a schematic diagram showing the internal structure of a node in a state where transmission/reception operations of one optical communication port are stopped in the communication system according to one embodiment of the present invention; FIG. 9 is a schematic diagram showing communication paths of optical signals in the optical communication network when one node is in the state shown in FIG. 8 ; FIG. 4 is a schematic diagram showing a node in a state where transmission/reception operations of two optical communication ports are stopped in the communication system according to one embodiment of the present invention; FIG. 11 is a schematic diagram showing communication paths of optical signals in the optical communication network when one node is in the state shown in FIG. 10; 6 is a flow chart showing an example of a flow of processing for detecting an abnormal location by a management server according to an embodiment of the present invention; 13 is a flow chart showing the flow of processing following the flow chart of FIG. 12; FIG. 14 is a flow chart showing a flow of processing following the flow chart of FIG. 13; FIG. FIG. 4 is a schematic diagram showing passage losses of optical signals at respective locations of nodes 2A to 2D in the non-bypass mode in the communication system according to one embodiment of the present invention; FIG. 16 is a schematic diagram showing passage losses of optical signals at respective locations of nodes 2A to 2D when the operation mode of node 2B is switched to the bypass mode from the state shown in FIG. 15; FIG. 16 is a schematic diagram showing passage losses of optical signals at respective locations of nodes 2A to 2D when the operation mode of node 2C is switched to the bypass mode from the state shown in FIG. 15; FIG. 11 is a schematic diagram showing the internal structure of a node of the first modified example; FIG. 11 is a schematic diagram showing the internal structure of a node of a second modified example;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited by the following embodiments. In addition, each drawing referred to in the following description only schematically shows the shape, size, and positional relationship to the extent that the contents of the present disclosure can be understood. That is, the present invention is not limited only to the shapes, sizes, and positional relationships illustrated in each drawing.

(embodiment)
A communication system S according to an embodiment of the present invention is a system capable of detecting an abnormal point in the optical communication network 100 . FIG. 1 is a schematic diagram showing an example of a communication system S. As shown in FIG.

As shown in FIG. 1 , a communication system S includes a plurality of nodes 2 and a management server 1 that controls operations of the plurality of nodes 2 .

A plurality of nodes 2 are connected to each other by transmission lines 3 to form an optical communication network 100 capable of transmitting optical signals between the nodes 2 . An example of the transmission line 3 is an optical fiber cable. The optical communication network 100 is, for example, a network configured with a plurality of communication paths such as a tree type, a ring type, and a mesh type, and maintains communication autonomously by switching communication paths. The optical communication network 100 of this embodiment is, for example, a mesh network formed by nodes 2A to 2K, which are a plurality of nodes 2, as shown in FIG.

The configuration of node 2 will be described with reference to FIGS. 2 to 4. FIG. 2 and 3 are schematic diagrams showing the internal configuration of the node 2. FIG. FIG. 4 is a functional block diagram showing part of the functional configuration of node 2. As shown in FIG. FIG. 5 is a diagram showing the communication system S in which the operation mode of the node 2B is set to the bypass mode.

Node 2 is a communication device with at least two optical communication ports 20 . A plurality of nodes 2 are interconnected by optical communication ports 20 in the optical communication network 100 . In the example shown in FIGS. 2-4, node 2 comprises two optical communication ports 20, optical communication ports 20a and 20b. A node 2 receives an optical signal from a node 2 adjacent to the node 2 through any optical communication port 20, and transmits the optical signal to the adjacent node 2 through an optical communication port 20 different from the optical communication port 20 that received the optical signal. Send an optical signal. In the case of the node 2B, for example, the optical communication port 20a receives the optical signal from the node 2A, and the optical communication port 20b transmits the optical signal to the node 2C. With this configuration, an optical signal transmitted from an external network or the like can be sent to a target node 2 via a plurality of nodes 2 . In this specification, a node adjacent to one node 2 is called an "adjacent node".

A functional configuration of node 2 will be described. As shown in FIG. 4 , the node 2 includes an optical transceiver module 21 and an optical switch section 22 built in a housing 23 .

The optical transceiver module 21 includes a first optical transceiver 211a, a first photoelectric converter 212a, a first monitor 213a, a first port-off unit 214a, a second optical transceiver 211b, and a second photoelectric converter 212b. , a second monitor unit 213b, and a second port off unit 214b.

The first optical transmitter/receiver 211 a transmits/receives optical signals to/from another node 2 via (passes) the optical switch 22 . The optical communication port 20a is configured by the first optical transceiver 211a.

The first photoelectric conversion unit 212a performs processing for converting an optical signal received via the first optical transmission/reception unit 211a into an electric signal, converts the electric signal into an optical signal, and transmits the optical signal to the first optical transmission/reception unit 211a. Do the sending process.

The first monitor unit 213a is electrically connected to the management server 1 and the first photoelectric conversion unit 212a, and measures the optical reception power (light reception intensity) received by the first optical transmission/reception unit 211a. That is, the first monitor unit 213a measures the received optical power of the optical communication port 20a. Optical reception power information (optical reception intensity information) indicating the optical reception power measured by the first monitor unit 213 a is transmitted to the management server 1 .

The first port-off unit 214a is electrically connected to the management server 1 and the first photoelectric conversion unit 212a, and controls the optical signal transmission/reception operation of the first optical transmission/reception unit 211a based on the control signal from the management server 1. do. For example, the first port off unit 214a executes a process of stopping the optical signal transmission/reception operation by the optical communication port 20a and a process of restarting the stopped transmission/reception operation.

The second optical transceiver 211 b transmits and receives optical signals to and from another node 2 via the optical switch 22 . The optical communication port 20b is configured by the second optical transceiver 211b.

The second photoelectric conversion unit 212b converts the optical signal received via the second optical transmission/reception unit 211b into an electrical signal, converts the electrical signal into an optical signal, and transmits the optical signal to the second optical transmission/reception unit 211b. Do the sending process.

The second monitor unit 213b is electrically connected to the second photoelectric conversion unit 212b and measures the received optical power received by the second optical transceiver unit 211b. That is, the second monitor unit 213b measures the received optical power of the optical communication port 20b. Optical reception power information indicating the optical reception power measured by the second monitor unit 213 b is transmitted to the management server 1 .

The second port-off unit 214b is electrically connected to the management server 1 and the second photoelectric conversion unit 212b, and controls the optical signal transmission/reception operation of the second optical transmission/reception unit 211b based on the control signal from the management server 1. do. For example, the second port off unit 214b executes a process of stopping the optical signal transmission/reception operation by the optical communication port 20b or a process of restarting the stopped transmission/reception operation.

The optical switch unit 22 is arranged between the transmission line 3 connecting the nodes 2 and the optical communication port 20, as shown in FIGS. The optical switch unit 22 is electrically connected to the management server 1, and changes the path through which the optical signal is transmitted within it based on a command signal from the management server 1 or when the power of the node is turned off. Set the operating mode to either non-bypass mode (normal mode) or bypass mode. The non-bypass mode is an operation mode in which optical signals are transmitted and received to and from adjacent nodes 2 via the optical communication port 20 . The bypass mode is an operation mode in which an optical signal is transmitted to the adjacent node 2 without passing through the optical communication port 20 .

FIG. 2 shows the internal configuration of the node 2 when the operation mode is set to the non-bypass mode, and FIG. 3 shows the internal configuration of the node 2 when the operation mode is set to the bypass mode. As shown in FIGS. 2 and 3, the optical switch unit 22 includes a non-bypass path 221 connecting the transmission line 3 and the optical communication port 20, and a bypass line 221 connecting the transmission lines 3 extending from two adjacent nodes 2. A path 222 exists. In the non-bypass path 221 and the bypass path 222 shown in FIGS. 2, 3, and 5, the paths selected as communication paths for transmitting optical signals are indicated by solid lines, and the paths not selected are indicated by two-dot chain lines. showing.

As shown in FIG. 2 , in the non-bypass mode, the optical switch section 22 sets the communication path through which the optical signal is transmitted to the non-bypass path 221 and connects the transmission path 3 and the optical communication port 20 . That is, the operation mode of the node 2 is switched to the non-bypass mode by selecting the non-bypass path 221 included in the node 2 as the communication path. This enables the optical transceiver module 21 of the node 2 to receive the optical signal from the adjacent node 2 .

As shown in FIG. 3 , in the bypass mode, the optical switch unit 22 sets the communication path through which the optical signal is transmitted to the bypass path 222 , and the transmission path 3 extending from the two adjacent nodes 2 without passing through the optical communication port 20 . directly connect each other. That is, the operation mode of the node 2 is switched to the bypass mode by selecting the bypass path 222 included in the node 2 as the communication path. For example, when the operation mode of node 2B is set to the bypass mode as shown in FIG. 5, the optical signal transmitted from node 2A is transmitted to node 2C without passing through the optical transceiver module 21 of node 2B.

Next, the management server 1 will be explained. The management server 1 is an information processing device that manages an optical communication network 100 formed by a plurality of nodes 2 and that executes processing for detecting an abnormal point in the optical communication network 100 .

First, the hardware configuration of the management server 1 will be described with reference to FIG. FIG. 6 is a block diagram showing the hardware configuration of the management server 1. As shown in FIG.

As shown in FIG. 6, the management server 1 includes a processor 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a bus 14, an input/output interface 15, an input section 16, an output A unit 17 , a storage unit 18 , and a communication unit 19 are provided.

The processor 11 executes various processes according to programs recorded in the ROM 12, programs loaded from the storage unit 18 to the RAM 13, or programs installed. The RAM 13 also stores data necessary for the processor 11 to execute various processes.

The processor 11 includes, for example, a CPU (Central Processing Unit), MPU (Micro Processing Unit), SoC (System on a Chip), DSP (Digital Signal Processor), GPU (Graphics Processing Unit), ASIC (Application on Specific Integrated Circuit), PLD (Programmable Logic Device) or FPGA (Field-Programmable Gate Array). Alternatively, processor 11 is a combination of several of these. Also, the processor 11 may be a combination of these with a hardware accelerator or the like.

Processor 11 , ROM 12 and RAM 13 are interconnected via bus 14 . An input/output interface 15 is also connected to this bus 14 . An input unit 16 , an output unit 17 , a storage unit 18 and a communication unit 19 are connected to the input/output interface 15 .

The input unit 16 and the output unit 17 are user interfaces that are electrically connected to input/output interfaces by wire or wirelessly. The input unit 16 is composed of a button and a display, and the output unit 17 is composed of a display, a speaker (not shown) for amplifying sound, and the like.

The storage unit 18 is configured by a semiconductor memory such as a DRAM (Dynamic Random Access Memory) and is a device that stores various data of the management server 10 . The storage unit 18 stores, for example, identification information of the nodes 2 forming the optical communication network 100, location information of the nodes 2, connection information of the nodes 2, and the like. The connection information of the nodes 2 is information indicating the connection relationship between the nodes 2, such as to which other nodes 2 a given node 2 is connected.

The communication unit 19 is a communication device for transmitting and receiving data between the management server 1 and the plurality of nodes 2 forming the optical communication network 100 .

Next, a functional configuration of the management server 1 for executing processing for detecting an abnormal point in the optical communication network 100 will be described. FIG. 7 is a functional block diagram showing part of the functional configuration of the management server 1. As shown in FIG. Note that the management server 1 is composed of general-purpose hardware. Further, although the details will be described later, the program according to the present invention implements the functions of the present invention by being executed by a general-purpose server.

A control unit 30 that performs various controls of the management server 1 is implemented by the processor 11 that performs arithmetic processing. The control unit 30 of the present embodiment includes an optical reception intensity information acquisition unit 31 , an abnormality candidate region estimation unit 32 , an operation mode switching unit 33 , an abnormality location detection unit 34 and a port operation control unit 35 .

The received optical power information acquisition unit 31 executes processing for acquiring received optical power information from the optical communication port 20 of each node 2 forming the optical communication network 100 . The received optical power information acquisition unit 31 may acquire the received optical power information of the optical communication port 20 of the node 2 at the timing based on the control signal from the abnormal point detection unit 34, for example.

The abnormality candidate area estimation unit 32 performs processing for estimating an abnormality candidate area in the optical communication network 100 based on the received optical power information of the optical communication port 20 of each node 2 acquired by the received optical intensity information acquisition unit 31. Execute. An anomaly candidate area is an area where an optical signal communication anomaly may occur. The abnormality candidate area estimator 32 estimates, as an abnormality candidate area, an area in which there is a node 2 in which the received optical power of the optical communication port 20 is outside a predetermined reference range, for example. The reference range indicates the variation range of received optical power that is allowed in the optical communication network 100 applied to the present invention. The reference range may be, for example, a preset range of received optical power, or a range of received optical power input by an administrator via the input unit 16. The range may be set according to the power of Also, different reference ranges may be set for each region in the optical communication network 100 . Note that a predetermined reference value may be used instead of the predetermined reference range. In this case, "outside the reference range" means that the power is lower than the reference value (that is, the received optical power does not satisfy the reference value). Also, "within the reference range" means that the power is equal to or higher than the reference value (that is, the received optical power satisfies the reference value).

The operation mode switching unit 33 controls the optical switch unit 22 of each node 2 in the optical communication network 100 to switch the operation mode of each node 2 between the non-bypass mode and the bypass mode. The operation mode switching unit 33 may switch the operation mode of the node 2 between the non-bypass mode and the bypass mode based on the control signal from the abnormal location detection unit 34, for example. Further, the operation mode switching unit 33 may switch the operation mode of the node 2 determined to have an abnormal location by the abnormal location detection unit 34 to the bypass mode.

The abnormal point detection unit 34 executes processing for detecting an abnormal point of optical communication in the optical communication network 100 based on the received optical power information of the node 2 . Specifically, when the operation mode of one node 2 among the plurality of nodes 2 is set to the non-bypass mode and the bypass mode, the abnormal point detection unit 34 detects the received optical power information acquired from the adjacent node 2. compare. Then, the abnormal point detection unit 34 detects the abnormal point of the optical communication network 100 based on the comparison result. Specifically, in the adjacent nodes 2, the abnormal point detection unit 34 determines that the received light power information is outside the reference range when one node 2 is operated in the non-bypass mode, and the one node 2 is in the bypass mode. It may be determined that one node 2 has an abnormal point when the received light power is within the reference range when operated with . For example, suppose that the received optical power information of nodes 2A and 2C when node 2B is in non-bypass mode is outside the reference range, and the received optical power information of nodes 2A and 2C when node 2B is in bypass mode is within the reference range. . In this case, if the optical signal is transmitted between the nodes 2A and 2C without passing through the optical communication port 20 of the node 2B, it can be interpreted that the communication abnormality around the node 2B has been resolved. That is, it can be interpreted that the communication abnormality occurred due to the influence of the node 2B. Therefore, the abnormal location detection unit 34 according to the present embodiment determines that there is an abnormal location within the node 2B.

The abnormality point detection unit 34 sequentially switches the operation mode between the non-bypass mode and the bypass mode for each node 2 in the optical communication network 100 or in the abnormality candidate area, and obtains all the received optical power information of each adjacent node 2. If it is out of the reference range, the abnormal point may be detected by the following processing (a), (b) or (c).
(a) Sequentially switch the operation mode of each node 2 between the non-bypass mode and the bypass mode, and acquire the received optical power information of the adjacent node 2 . Then, when the absolute value of the difference in the received optical power information between the non-bypass mode and the bypass mode is the largest, it is determined that the one node 2 whose operation mode is switched has an abnormal location.
(b) Sequentially switch the operation mode of each node 2 between the non-bypass mode and the bypass mode, and acquire the received optical power information of the adjacent node 2 . Then, the operation mode when the absolute value of the difference between the received optical power information of one node 2 in the non-bypass mode and the received optical power information of the adjacent node 2 in the bypass mode of the one node 2 is the largest. It is determined that the switched one node 2 has an abnormal location.
(c) Sequentially switch the operation mode of each node 2 between the non-bypass mode and the bypass mode, and acquire the received optical power information of the adjacent node 2 . If the absolute value of the difference between the received optical power information in the non-bypass mode and the bypass mode is smaller than a predetermined threshold value, it is determined that there is an abnormality in the transmission line 3 connecting the nodes 2 . The threshold value may be set, for example, based on a passage loss that occurs when an optical signal passes through the transmission line 3 in an area in the optical communication network 100 where no communication abnormality has occurred.

The port operation control unit 35 controls transmission and reception of optical signals by the optical communication port 20 . The port operation control unit 35 controls, for example, the first port-off unit 214a and the second port-off unit 214b to stop the transmission/reception operation of optical communication or restart the stopped transmission/reception operation. The port operation control unit 35 may stop the transmission/reception operation of optical communication according to the degree of communication failure at the abnormal location detected by the abnormal location detection unit 34, for example. This is because if the degree of communication failure is severe, a data error or the like may occur in a packet destined for node 2 after passing through the abnormal point, which may affect the communication of the entire optical communication network 100 .

Here, the process of controlling the optical signal transmission/reception operation of the optical communication port 20 by the port operation control unit 35 will be described with reference to FIGS. 8 to 11. FIG. FIG. 8 is a schematic diagram showing the internal structure of the node 2 when the transmission/reception operation of the optical communication port 20a of the node 2B is stopped. FIG. 9 is a schematic diagram showing the optical signal communication path 4 in the optical communication network 100 when the node 2B is in the state shown in FIG. FIG. 10 is a schematic diagram showing the internal structure of the node 2 when the transmission/reception operations of the optical communication ports 20a and 20b of the node 2B are stopped. FIG. 11 is a schematic diagram showing the optical signal communication path 4 in the optical communication network 100 when the node 2B is in the state shown in FIG. In the non-bypass path 221 and the bypass path 222 shown in FIGS. 8 and 10, the paths selected as communication paths for transmitting optical signals are indicated by solid lines, and the paths not selected are indicated by two-dot chain lines.

For example, when it is determined that there is an abnormality in the optical communication port 20a of the node 2B, the port operation control unit 35 stops the optical signal transmission/reception operation by the optical communication port 20a as shown in FIG. As a result, the optical communication port 20a of the node 2B is disconnected from the optical communication network 100 as shown in FIG. Since the optical communication network 100 is a mesh network that maintains communication autonomously, the communication path 4 to the nodes 2A and 2C adjacent to the node 2B separated from the optical communication network 100 is secured. For example, as shown in FIG. 9, the optical signal transmitted from the management server 1 is transmitted from the node 2A to the node 2C via the nodes 2H to 2E without passing through the node 2B. As a result, the influence of the communication failure of the node 2B within the optical communication network 100 is eliminated.

For example, when it is determined that there is an abnormality in the optical communication ports 20a and 20b of the node 2B, the port operation control unit 35 stops optical signal transmission/reception operations by the optical communication ports 20a and 20b as shown in FIG. As a result, the node 2B is disconnected from the optical communication network 100 as shown in FIG. Since the optical communication network 100 is a mesh network that maintains communication autonomously, the communication path 4 to the nodes 2A and 2C adjacent to the node 2B separated from the optical communication network 100 is secured. For example, as shown in FIG. 11, the optical signal transmitted from the management server 1 is transmitted from the node 2A to the node 2C via the nodes 2H to 2E without passing through the node 2B. As a result, the influence of the communication failure of the node 2B within the optical communication network 100 is eliminated.

Next, a process of detecting an abnormal point in the optical communication network 100 by the management server 1 will be described with reference to FIGS. 12 to 14. FIG. 12 to 14 are flowcharts showing an example of the flow of detection processing of an abnormal point in the optical communication network 100 executed by the control unit 30 of the management server 1. FIG.

As shown in FIG. 12, in step S11, the received light intensity information acquisition unit 31 receives light from the optical communication port 20 of each node 2 forming the optical communication network 100 when the operation mode of each node 2 is the non-bypass mode. Get received power information. Then, the abnormality candidate area estimator 32 estimates an abnormality candidate area in the optical communication network 100 based on the received light power information acquired by the received light intensity information acquirer 31 . 12 to 14, the abnormal point detection process of the optical communication network 100 will be described by taking as an example the case where the abnormality candidate area estimation unit 32 estimates that the area between the node 2B and the node 2C is the abnormal point estimation area. do.

In step S12, the operation mode switching unit 33 switches the operation mode of the node 2B to the bypass mode. At this time, the operation mode of the nodes 2 other than the node 2B in the optical communication network 100 is set to the non-bypass mode.

In step S13, the received optical power information acquisition unit 31 acquires received optical power information from the nodes 2A and 2C, which are adjacent nodes 2 of the node 2B whose operation mode has been switched to the bypass mode in step S12.

In step S14, the abnormal point detection unit 34 determines whether or not there is an abnormality in the received optical powers of the nodes 2A and 2C acquired in step S13. For example, if any of the received optical power information of the node 2A and the node 2C obtained in step S13 is outside the reference range, the abnormal point detection unit 34 determines that there is an abnormality in the received optical power. When the abnormality detection unit 34 determines that there is an abnormality in the received optical power of the node 2A or the node 2C (step S14; Yes), the control unit 30 shifts the process to step S15. On the other hand, if both the received optical power information of the nodes 2A and 2C obtained in step S12 are within the reference range, the abnormal point detection unit 34 determines that there is no abnormality in the received optical power. When determining that there is no abnormality in the received optical powers of the nodes 2A and 2C (step S14; No), the abnormality detection unit 34 determines that the node 2B has an abnormality. That is, the abnormal point detection unit 34 determines that the received optical power information of the node 2A or the node 2C when the node 2B is in the non-bypass mode is outside the reference range, and the received optical power information of the nodes 2A and 2C when the node 2B is in the bypass mode. is within the reference range, it is determined that node 2B has an abnormal location.

As shown in FIG. 13, in step S15, the operation mode switching unit 33 switches the operation mode of the node 2B to the non-bypass mode and switches the operation mode of the node 2C to the bypass mode.

In step S16, the received optical power information acquisition unit 31 acquires received optical power information from the nodes 2B and 2D, which are adjacent nodes 2 of the node 2C whose operation mode has been switched to the bypass mode in step S15.

In step S17, the abnormal point detection unit 34 determines whether or not there is an abnormality in the received optical powers of the nodes 2B and 2D acquired in step S16. For example, if any of the received optical power information of the node 2B and the node 2D acquired in step S14 is outside the reference range, the abnormal point detection unit 34 determines that there is an abnormality in the received optical power. If the abnormality detection unit 34 determines that there is an abnormality in the received optical power of the node 2B or the node 2D (step S17; Yes), the control unit 30 shifts the process to step S18. On the other hand, if both the received optical power information of the nodes 2B and 2D acquired in step S15 are within the reference range, the abnormal point detection unit 34 determines that there is no abnormality in the received optical power. When determining that there is no abnormality in the received optical powers of the nodes 2B and 2D (step S17; No), the abnormality detection unit 34 determines that the node 2C has an abnormality. That is, the abnormal point detection unit 34 determines that the received optical power information of the node 2B or the node 2D when the node 2C is in the non-bypass mode is outside the reference range, and the received optical power information of the nodes 2B and 2D when the node 2C is in the bypass mode. is within the reference range, it is determined that the node 2C has an abnormal location.

As shown in FIG. 14, in step S18, the abnormal point detection unit 34 determines whether or not the received optical power information of the node 2B acquired in step S11 is substantially equal to the received optical power information of the node 2A acquired in step S13. do. Specifically, when the absolute value of the difference between the received optical power information of the node 2B in the non-bypass mode and the received optical power information of the node 2A in the bypass mode of the node 2B is smaller than a predetermined threshold, it is considered to be substantially equal. judge. If the absolute value of the difference between the received optical power information of the node 2B in the non-bypass mode and the received optical power information of the node 2A in the bypass mode of the node 2B is smaller than a predetermined threshold (step S18; Yes), the control unit 30 shifts the process to step S19. On the other hand, if the absolute value of the difference between the received optical power information of the node 2B in the non-bypass mode and the received optical power information of the node 2A in the bypass mode of the node 2B is equal to or greater than the predetermined threshold (step S18; No), The control unit 30 shifts the process to step S20.

In step S19, the abnormal point detection unit 34 determines whether or not the received optical power information of the node 2C acquired in step S11 is substantially equal to the received optical power information of the node 2D acquired in step S13. Specifically, when the absolute value of the difference between the received optical power information of the node 2C in the non-bypass mode and the received optical power information of the node 2D in the bypass mode of the node 2C is smaller than a predetermined threshold (step S19; Yes), it is determined that both are substantially equal. On the other hand, if the absolute value of the difference between the received optical power information of the node 2C in the non-bypass mode and the received optical power information of the node 2D in the bypass mode of the node 2C is equal to or greater than the predetermined threshold (step S19; No), It is determined that the two are different.

In step S20, the abnormal point detection unit 34 determines whether or not the received optical power information of the node 2C obtained in step S11 is substantially equal to the received optical power information of the node 2D obtained in step S13. Specifically, when the absolute value of the difference between the received optical power information of the node 2C in the non-bypass mode and the received optical power information of the node 2D in the bypass mode of the node 2C is smaller than a predetermined threshold (step S20; Yes), it is determined that both are substantially equal. On the other hand, if the absolute value of the difference between the received optical power information of the node 2C in the non-bypass mode and the received optical power information of the node 2D in the bypass mode of the node 2C is equal to or greater than the predetermined threshold (step S20; No), It is determined that the two are different.

The abnormal point detection unit 34 makes the following determinations (d) to (g) based on the results of the processing in steps S18 and S19 or the results of the processing in steps S18 and S20.
(d) If Yes is determined in step S18 and Yes in step S19, it is determined that there is an abnormal point in the transmission line 3 between the node 2B and the node 2C.
(e) If Yes is determined in step S18 and No in step S19, it is determined that node 2C has an abnormal location.
(f) If No is determined in step S18 and Yes is determined in step S19, it is determined that node 2B has an abnormal location.
(g) If it is determined No in step S18 and if it is determined No in step S19, it is determined that there are a plurality of abnormal locations.

Here, the above determinations (d) to (g) by the abnormal location detection unit 34 will be described with reference to FIGS. 15 to 17. FIG.

FIG. 15 is a schematic diagram showing passage losses of optical signals at respective points of nodes 2A to 2D in the non-bypass mode in the communication system S. FIG. FIG. 16 is a schematic diagram of the optical signal passage loss at each location of the nodes 2A to 2D when the operation mode of the node 2B is switched to the bypass mode from the state shown in FIG. FIG. 17 is a schematic diagram showing passage losses of optical signals at respective points of nodes 2A to 2D when the operation mode of node 2C is switched to the bypass mode from the state shown in FIG. In the non-bypass path 221 and bypass path 222 shown in FIGS. 15 to 17, the communication path selected as the path for transmitting the optical signal is indicated by a solid line, and the non-selected communication path is indicated by a chain double-dashed line. .

As shown in FIG. 15, when the nodes 2B and 2C are in the non-bypass mode, the optical communication port 20b of the node 2B is transmitted from the optical communication port 20a of the node 2C, and the non-bypass path 221 or between the nodes 2B and 2C is transmitted. An optical signal transmitted through the transmission line 3 is received. At this time, the passage loss "Bn" of the optical signal of the node 2B is represented by the following formula (1).

Bn=Bc+f+Cb Expression (1)
"Bc" is the passage loss of the optical signal transmitted from the node 2C side to the optical communication port 20b within the node 2B. Also, "f" is the passage loss of the optical signal passing through the transmission line 3 connecting between the node 2B and the node 2C. "Cb" is the passage loss of the optical signal transmitted from the node 2B side to the optical communication port 20a within the node 2C.

As shown in FIG. 16, when the node 2B is in bypass mode, the node 2A transmits from the optical communication port 20a of the node 2C, the transmission path 3 between the nodes 2B and 2C, the bypass path 222 of the node 2B, and the nodes 2A and 2B. An optical signal transmitted through the transmission line 3 between is received. At this time, assuming that there is no communication abnormality in the node 2A, the passage loss "Ab" of the optical signal of the node 2A is represented by the following equation (2).

Ab=α+Bt+f+Cb Expression (2)
Note that "α" is the passage loss of the optical signal passing through the transmission line 3 connecting the nodes 2A and 2B. “Bt” is the passage loss of the optical signal transmitted between the node 2A side and the node 2C side via the optical switch section 22 within the node 2B in the bypass mode.

Both Bc and Bt can be assumed to be 0 when node 2B is normal. In this case, the formula (1) is represented by the following formula (3), and the formula (2) is represented by the following formula (4).

Bn=f+Cb Expression (3)
Ab=α+f+Cb Expression (4)

The following formula (5) is derived from the formulas (3) and (4).
Ab=Bn+α=f+Cb+α Expression (5)

α is the passing loss of the transmission line 3 connecting the nodes 2, and is a very small value with respect to Cb+f. Therefore, if there is no abnormality in the node 2B, it can be considered that Bn and Ab are approximately equal. That is, when there is no abnormality in the node 2B, it can be considered that the received optical power of the node 2B in the non-bypass mode and the received optical power of the node 2A in the case where the operation mode of the node 2B is set to the bypass mode are substantially equal. . Therefore, as in the above (d) and (e), the abnormal point detection unit 34 determines that the received optical power of the node 2B in the non-bypass mode is equal to that of the node 2A in the bypass mode in step S18 shown in FIG. , it is determined that at least node 2B does not have an abnormal location.

As shown in FIG. 15, when the nodes 2B and 2C are in the non-bypass mode, the optical communication port 20a of the node 2C is transmitted from the optical communication port 20b of the node 2B, and the non-bypass path 221 and the transmission path 3 between the nodes 2B and 2C are transmitted. receive the optical signal transmitted through the At this time, the passage loss "Cn" of the optical signal of the node 2B is represented by the following equation (6).

Cn=Bc+f+Cb Expression (6)

As shown in FIG. 17, when the node 2C is in bypass mode, the node 2D transmits from the optical communication port 20b of the node 2B, the transmission path 3 between the nodes 2B and 2C, the bypass path 222 of the node 2C, and the nodes 2A and 2B. An optical signal transmitted through the transmission line 3 between is received. At this time, assuming that there is no communication abnormality in the node 2D, the passage loss "Dc" of the optical signal in the node 2D is expressed by the following equation (7).

Dc=Bc+f+Ct+β Expression (7)
"Ct" is the passage loss of the optical signal transmitted between the node 2B side and the node 2D side via the optical switch section 22 in the node 2C in the bypass mode. "β" is the passing loss of the optical signal passing through the transmission line 3 connecting between the node 2C and the node 2D.

If node 2C is normal, both Cb and Ct can be assumed to be zero. In this case, the formula (6) is represented by the following formula (8), and the formula (7) is represented by the following formula (9).

Cn=Bc+f Expression (8)
Dc=Bc+f+β Expression (9)

The following formula (10) is derived from the formulas (8) and (9).
Dc=Cn+β=Bc+f Expression (10)

β is the passage loss of the transmission line 3 connecting the nodes 2, and is a very small value with respect to Bc+f. Therefore, if the node 2C is normal, Cn and Dc can be considered to be approximately equal. That is, when there is no abnormality in the node 2C, it can be considered that the received optical power of the node 2C in the non-bypass mode and the received optical power of the node 2D in the case where the operation mode of the node 2C is set to the bypass mode are substantially equal. . Therefore, as in the above (d) and (f), the abnormal point detection unit 34 determines that the received optical power of the node 2C in the non-bypass mode is the same as that of the node 2D in the bypass mode in step S19 shown in FIG. , it is determined that at least the node 2C does not have an abnormal portion.

If neither the node 2B nor the node 2C has an abnormality, the abnormal point detection unit 34 determines that the abnormal point is the transmission line 3 between the nodes 2B and 2C. In this case, Bc, Bt, Cb, and Ct can all be assumed to be 0, and from equations (1), (2), (6), and (7), Bn, Ab, Cn, and Dc are all "f". . That is, the received optical power of the node 2B in the non-bypass mode is approximately equal to the received optical power of the node 2A when the node 2B is in the bypass mode, and the received optical power of the node 2C in the non-bypass mode is approximately equal to the received optical power of the node 2C in the bypass mode. It becomes substantially equal to the optical reception power of the node 2D in the mode. Therefore, as in (d) above, the abnormal point detection unit 34 determines Yes in step S18, and if it determines Yes in step S19, the abnormal point detection unit 34 detects an abnormal point in the transmission line 3 between the node 2B and the node 2C. is determined to exist.

According to the embodiment described above, the following effects are obtained.

An information processing program according to the present embodiment is an optical communication network 100 for acquiring optical reception power information indicating the optical reception power of each of the optical communication ports 20 of a plurality of nodes 2 interconnected by the optical communication ports 20. The reception intensity information acquisition unit 31 determines the operation mode of each of the plurality of nodes 2 to be a non-bypass mode in which optical signals are transmitted and received between the adjacent nodes 2 via the optical communication port 20 and a and the bypass mode in which the optical signal is transmitted to the node 2 adjacent to the node 2, and when the operation mode of one node 2 is set to the non-bypass mode and the bypass mode, respectively, The computer implements an abnormal point detection unit 34 that compares received optical power information acquired from nodes 2 adjacent to one node 2 and detects an abnormal point in the optical communication network 100 based on the comparison result.

As a result, the received optical power information of the adjacent node 2 is compared when the optical signal is transmitted through the optical communication port 20 of one node 2 and when the optical signal is transmitted without the optical communication port 20 of one node 2. It is possible to grasp the degree of influence on communication to the surroundings. Therefore, even if a communication abnormality occurs at a level that does not disable communication, the location of the abnormality in the optical communication network 100 can be detected. Further, each node 2 (communication equipment) that constitutes the optical communication network 100 is arranged on a telegraph pole or the like at a distance of several tens of meters to several kilometers. According to the information processing program according to the present embodiment, if a communication abnormality occurs, the location of the abnormality can be identified before the worker arrives at the site where the restoration work is to be performed, so the trouble and cost of the restoration work can be reduced.

Further, in the information processing program according to the present embodiment, in the node 2 adjacent to the one node 2, the abnormal point detection unit 34 causes the received optical power information when the one node 2 is operated in the non-bypass mode to be a predetermined value. If it is outside the reference range and the optical reception power information obtained when the one node 2 is operated in the bypass mode is within the reference range, it is determined that the one node 2 has an abnormal location.

This makes it possible to accurately identify the node 2 that is the cause of the communication error with simpler processing.

Further, in the information processing program according to the present embodiment, the abnormal point detection unit 34 sequentially switches the operation mode of each node 2 between the non-bypass mode and the bypass mode for the plurality of nodes 2 to is obtained, and when the absolute value of the difference between the received optical power information in the non-bypass mode and the bypass mode is the largest, it is determined that there is an abnormality in the one node 2 whose operation mode is switched. judge.

This makes it possible to identify the node 2 that is the cause of the communication abnormality even when the change in received optical power between the non-bypass mode and the bypass mode is small.

Further, in the information processing program according to the present embodiment, the abnormal point detection unit 34 sequentially switches the operation mode of each node 2 between the non-bypass mode and the bypass mode for the plurality of nodes 2 to is acquired, and if the absolute value of the difference between the received optical power information in the non-bypass mode and the bypass mode is smaller than a predetermined threshold, the transmission line 3 connecting the nodes 2 has an abnormal location. Determine that it exists.

As a result, even if the location of the failure exists not in the node 2 but between the nodes 2, the location of the failure can be detected.

Further, in the information processing program according to the present embodiment, the operation mode switching unit 33 switches the operation mode of the node 2 determined by the abnormal location detection unit 34 to have an abnormal location to the bypass mode.

As a result, the optical signal can be transmitted to the adjacent node 2 without passing through the optical communication port 20 of the node 2 that has been determined to have an abnormal location. You can limit the impact.

Further, the method of detecting an abnormal location according to the present embodiment is a method of detecting an abnormal location executed by the management server 1. a reception intensity information acquiring step of acquiring optical reception power information indicating the optical reception power of an optical communication port 20; An operation mode switching step for switching between a non-bypass mode in which an optical signal is transmitted and received and a bypass mode in which an optical signal is transmitted to an adjacent node 2 without passing through an optical communication port 20; When the mode is set to each of the non-bypass mode and the bypass mode, the received optical power information obtained from the node 2 adjacent to the one node 2 is compared, and based on the comparison result, the abnormality of the optical communication network 100 and an abnormal point detection step of detecting the point.

As a result, the received optical power information of the adjacent node 2 is compared when the optical signal is transmitted through the optical communication port 20 of one node 2 and when the optical signal is transmitted without the optical communication port 20 of one node 2. It is possible to grasp the degree of influence on communication to the surroundings. Therefore, even if a communication abnormality occurs at a level that does not disable communication, the location of the abnormality in the optical communication network 100 can be detected.

Also, the management server 1 according to the present embodiment acquires received optical power information indicating the received optical power of the optical communication ports 20 of the plurality of nodes 2 interconnected by the optical communication ports 20 in the optical communication network 100. The optical reception intensity information acquisition unit 31 selects the operation mode of each of the plurality of nodes 2 as a non-bypass mode in which optical signals are transmitted and received between adjacent nodes 2 via the optical communication port 20 and a non-bypass mode in which optical signals are transmitted and received via the optical communication port 20 . and the bypass mode in which the optical signal is transmitted to the adjacent node 2, and the operation mode of one node 2 is set to the non-bypass mode and the bypass mode, respectively. , and an abnormal point detection unit 34 that compares received optical power information acquired from nodes 2 adjacent to one node 2 and detects an abnormal point in the optical communication network 100 based on the comparison result.

As a result, the received optical power information of the adjacent node 2 is compared when the optical signal is transmitted through the optical communication port 20 of one node 2 and when the optical signal is transmitted without the optical communication port 20 of one node 2. It is possible to grasp the degree of influence on communication to the surroundings. Therefore, even if a communication abnormality occurs at a level that does not disable communication, the location of the abnormality in the optical communication network 100 can be detected.

Further, the communication system S according to this embodiment includes a plurality of nodes 2 interconnected by the optical communication ports 20 in the optical communication network 100, and a management server 1 that controls the operation of the plurality of nodes 2, The management server 1 includes an optical reception intensity information acquisition unit 31 for acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port 20 of each of the plurality of nodes 2, switching between a non-bypass mode in which optical signals are transmitted/received to and from the adjacent node 2 via the optical communication port 20, and a bypass mode in which the optical signal is transmitted to the adjacent node 2 without passing through the optical communication port 20. comparing received light power information acquired from a node 2 adjacent to one node 2 when the operation mode switching unit 33 sets the operation mode of one node 2 to a non-bypass mode and a bypass mode, respectively; and an anomaly detection unit 34 for detecting an anomaly in the optical communication network 100 based on the comparison result.

As a result, the received optical power information of the adjacent node 2 is compared when the optical signal is transmitted through the optical communication port 20 of one node 2 and when the optical signal is transmitted without the optical communication port 20 of one node 2. It is possible to grasp the degree of influence on communication to the surroundings. Therefore, even if a communication abnormality occurs at a level that does not disable communication, the location of the abnormality in the optical communication network 100 can be detected.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate.

In the above-described embodiment, the control unit 30 of the management server 1 includes the abnormality candidate region estimation unit 32, but the configuration without the abnormality candidate region estimation unit 32 is also possible. That is, the management server 1 may perform the process of detecting an abnormal location without performing the process of estimating an abnormal candidate region.

In the above embodiment, the node 2 includes one optical transceiver module 21 and one optical switch unit 22, but the number of optical transceiver modules 21 and optical switch units 22 included in the node 2 is not particularly limited. For example, the node 2 may have two or more optical transceiver modules 21 and two or more optical switch units 22 .

FIG. 18 is a schematic diagram showing the internal structure of the node 200 of the first modified example. The node 200 includes optical transceiver modules 21a and 21b, optical switch units 22a and 22b, and a housing 23, as shown in FIG. The optical transmission/reception module 21a is connected to the optical switch section 22a through the optical communication port 20 thereof. The optical transmission/reception module 21b is connected to the optical switch section 22b via its optical communication port 20 .

When the management server 1 detects an abnormal location, for example, the optical switch unit 22 in the node 200 is sequentially controlled to set the non-bypass mode and the bypass mode, and the received optical power information acquired from the adjacent node 2 is You can compare. Also, for example, the management server 1 can simultaneously control the operation of the two optical switch units 22 in the node 200 to set the non-bypass mode and the bypass mode, and compare the received optical power information acquired from the adjacent node 2. good. That is, when the node 2 includes a plurality of sets of the non-bypass routes 221 and the bypass routes 222, the management server 1 sets all the sets of the non-bypass routes 221 and the bypass routes 222 in the node 2 at the same time. A first operation mode switching control unit that controls the operation of the operation mode switching unit 33 so that the bypass path 222 is selected may be further provided.

As a result, even in the optical communication network 100 in which one node 2 includes a plurality of optical switch units 22, the node 2 having an abnormal point can be detected efficiently.

Further, when the operation of the operation mode switching unit 33 is controlled by the first operation mode switching control unit, the management server 1 sets the non-bypass route 221 to the set of the plurality of non-bypass routes 221 and bypass routes 222 in the node 2 . Alternatively, it may further include a second operation mode switching control unit that controls the operation mode switching unit 33 to sequentially select one of the bypass paths 222 .

As a result, even in the optical communication network 100 in which there is a node 2 including a plurality of optical switch units 22 in one node 2, the node 2 having an abnormal location can be efficiently detected, and the detected node 2 can be 2 can be accurately identified as the cause of the communication error.

Further, in the above embodiment, the optical transceiver module 21 of the node 2 is connected to the optical switch unit 22, but the optical transceiver module 21 that is not connected to the optical switch unit 22 may be provided.

FIG. 19 is a schematic diagram showing the internal structure of the node 201 of the second modified example. As shown in FIG. 19, the node 201 includes an optical switch section 22, an optical transmission/reception module 21a connected to the optical switch section 22, and an optical transmission/reception module 21c not connected to the optical switch section 22. FIG. The optical transceiver module 21 c is connected to the adjacent node 2 via the transmission line 3 without the optical switch section 22 .

1 management server (information processing device)
20, 20a, 20b Optical communication port 31 Optical reception intensity information acquisition unit 33 Operation mode switching unit 34 Abnormal location detection unit 100 Optical communication network

Claims (10)

a reception intensity information acquiring unit for acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port of each of a plurality of nodes interconnected by an optical communication port in an optical communication network;
Operation modes of each of the plurality of nodes are divided into a non-bypass mode in which optical signals are transmitted and received to and from the adjacent nodes via the optical communication ports, and an optical signal transmission to the adjacent nodes without the optical communication ports. an operation mode switching unit that switches to either a bypass mode in which is transmitted;
When the operation mode of one of the nodes is set to the non-bypass mode and the bypass mode, the received light intensity information obtained from the nodes adjacent to the one of the nodes is compared, and based on the comparison result an information processing program for causing a computer to implement an abnormal location detection unit that detects an abnormal location in the optical communication network. The abnormal point detection unit determines that, in the nodes adjacent to the one node, received light intensity information when the one node is operated in the non-bypass mode is outside a predetermined reference range, and 2. The information processing program according to claim 1, wherein it is determined that one of the nodes has an abnormal point when the optical reception intensity information obtained when the nodes are operated in the bypass mode is within the reference range. The abnormal point detection unit sequentially switches the operation mode of each of the plurality of nodes between the non-bypass mode and the bypass mode, and obtains optical reception intensity information of other adjacent nodes; 2. The method according to claim 1, wherein when the absolute value of the difference between said optical reception intensity information in said non-bypass mode and said optical reception intensity information in said bypass mode is the largest, it is determined that an abnormal point exists in said one node whose operation mode is switched. information processing program. The abnormal point detection unit sequentially switches the operation mode of each of the plurality of nodes between the non-bypass mode and the bypass mode, and obtains optical reception intensity information of other adjacent nodes; 2. If an absolute value of a difference between said optical reception intensity information in said non-bypass mode and said bypass mode is smaller than a predetermined threshold, it is determined that there is an abnormal portion in the transmission line connecting said nodes. The information processing program described in . 5. The information processing program according to any one of claims 1 to 4, wherein the operation mode switching unit switches the operation mode of the node determined to have an abnormal location by the abnormal location detection unit to the bypass mode. The operation mode of the node is switched to the non-bypass mode by selecting the non-bypass mode communication path included in the node, and is switched to the bypass mode by selecting the bypass mode communication path. mode is switched to
When the node includes a plurality of sets of communication paths for the non-bypass mode and the bypass mode, all the sets of the communication paths for the non-bypass mode and the bypass mode in the node are simultaneously set to the non-bypass mode. The information processing according to any one of claims 1 to 5, further comprising a first operation mode switching control unit that controls the operation of the operation mode switching unit so that the bypass mode communication path or the bypass mode communication path is selected. program. a second operation mode for controlling the operation of the operation mode switching unit so as to sequentially select either the non-bypass mode communication path or the bypass mode communication path for a set of the plurality of communication paths within the node; 7. The information processing program according to claim 6, further comprising a switching control section. A method for detecting an abnormal location executed by an information processing device, comprising:
a reception intensity information acquiring step of acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port of each of a plurality of nodes interconnected by an optical communication port in an optical communication network;
Operation modes of each of the plurality of nodes are divided into a non-bypass mode in which optical signals are transmitted and received to and from the adjacent nodes via the optical communication ports, and an optical signal transmission to the adjacent nodes without the optical communication ports. an operation mode switching step of switching to either a bypass mode in which is transmitted;
When the operation mode of one of the nodes is set to the non-bypass mode and the bypass mode, the received light intensity information obtained from the nodes adjacent to the one of the nodes is compared, and based on the comparison result and an abnormal point detection step of detecting an abnormal point in the optical communication network. In an optical communication network, an optical reception intensity information acquiring unit for acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port of each of a plurality of nodes interconnected by an optical communication port;
Operation modes of each of the plurality of nodes are divided into a non-bypass mode in which optical signals are transmitted and received to and from the adjacent nodes via the optical communication ports, and an optical signal transmission to the adjacent nodes without the optical communication ports. an operation mode switching unit that switches to either a bypass mode in which is transmitted;
When the operation mode of one of the nodes is set to the non-bypass mode and the bypass mode, the received light intensity information obtained from the nodes adjacent to the one of the nodes is compared, and based on the comparison result and an anomaly detection unit for detecting an anomaly in the optical communication network. a plurality of nodes interconnected by optical communication ports in an optical communication network;
and an information processing device that controls the operation of the plurality of nodes,
The information processing device is
an optical reception intensity information acquiring unit for acquiring optical reception intensity information indicating the optical reception intensity of the optical communication port of each of the plurality of nodes;
Operation modes of each of the plurality of nodes are divided into a non-bypass mode in which optical signals are transmitted and received to and from the adjacent nodes via the optical communication ports, and an optical signal transmission to the adjacent nodes without the optical communication ports. an operation mode switching unit that switches to either a bypass mode in which is transmitted;
When the operation mode of one of the nodes is set to the non-bypass mode and the bypass mode, the received light intensity information obtained from the nodes adjacent to the one of the nodes is compared, and based on the comparison result and an anomaly detection unit for detecting an anomaly in the optical communication network.

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