WO2023286266A1 - Optical node and method for switching optical line path - Google Patents

Abstract

The purpose of the present disclosure is to make it possible to verify a port connecting an in-location node and an out-of-location node within a plurality of optical nodes connected in an optical network.　The present disclosure relates to a plurality of optical nodes provided to an optical fiber network in which the optical nodes are connected, each of the optical nodes comprising: an optical cross-connect unit; an optical cross-connect control unit; a light source for optically supplying electric power to the other optical nodes and transmitting, to the other optical nodes, a control signal for switching a port connected to a host device by an optical fiber core line; an optical receiver for receiving information pertaining to an optical power value measured at a post-switching port in the other optical nodes; a controller for controlling the light source and the optical receiver; and an in-location node integrated control unit for controlling the controller and the optical cross-connect control unit so as to switch the port connecting the host device and the other optical nodes, and acquiring the information pertaining to the optical power value that was received by the optical receiver.

Description

Optical node and method for switching optical lines

The present disclosure mainly relates to the configuration of an optical node that performs remote optical line switching and is installed in-house in an optical fiber network.

In an optical fiber network, especially an access network that connects communication equipment installed in a telecommunication building and communication terminals on the user side, optical fiber cores can be connected to arbitrary routes in order to efficiently use the equipment during the opening and maintenance of the network. Optical line switching such as changing the route and changing the route is performed at a certain frequency. Normally, such work is performed by going to the site and physically switching the connection, but a technique for performing this work remotely using an optical switch has been proposed.

Specifically, in a system consisting of a supervisory control device installed in a power supply environment such as a facility and one or more optical line switching nodes remotely placed, optical power supply and inclusion in the node with a single laser A system has been proposed that can simultaneously realize the function of controlling a plurality of optical switches in a network and provide an economical optical line switching node system (see, for example, Non-Patent Document 1).

However, in the case of such a system, in various forms of optical fiber networks, it is conceivable that it may be necessary to switch the route inside the station in conjunction with the route switching of the optical node outside the station. There is no clear method for In addition, when the optical port monitoring unit of an optical node installed outside the site receives test light and checks the normality, it is possible to interlock with the optical node installed outside the site and test it from the inside of the site in some way. It would be necessary to transmit light, but there is no clear method inside the station.

An object of the present disclosure is to make it possible to confirm the ports to which the on-site node and the off-site node are connected in a plurality of optical nodes connected to an optical network.

The optical node of the present disclosure includes:
The optical node provided in an optical fiber network in which a plurality of optical nodes are connected,
an optical cross-connect unit connected to an optical node other than the own device among the plurality of optical nodes and switching a port connected to the other optical node by an optical fiber core;
an optical cross-connect control unit that controls the optical cross-connect unit;
an inter-node connection management unit that stores the mutual connection state of each port of the device and the other optical node;
Control for connecting to the other optical node by an optical fiber core wire different from the optical cross-connect unit, optically supplying power to the other optical node, and switching the port connected to the own device by the optical fiber core wire a light source that transmits signal light to the other optical node;
an optical receiver that receives information on the optical power value measured at the port after switching in the other optical node;
a controller that controls the light source and the optical receiver;
In-house node total control for controlling the controller and the optical cross-connect control unit to switch the port connecting the own device and the other optical node, and acquiring the information of the optical power value received by the optical receiver Department and
characterized by comprising

The method of the present disclosure comprises:
A method performed by an optical node in an optical fiber network to which a plurality of optical nodes are connected, comprising:
The in-house node integrated control unit provides an optical cross-connect unit connected to an optical node other than the own device among the plurality of optical nodes, and provides a port connected to the other optical node by an optical fiber core line. let me switch
The in-house node integrated control unit instructs the light source to optically supply power to the other optical node and to transmit control signal light to the other optical node to switch the port connected to the device by the optical fiber core line. , let it go,
An optical receiver receives an optical power value measured at a switched port in the other optical node;
the in-house node integrated control unit acquires information on the optical power value received by the optical receiver, thereby confirming the port connected to the other optical node;
The mutual connection state of each port of the own device and the other optical node is stored in the inter-node connection management unit.

The present disclosure can make it possible to confirm the ports to which the on-site node and the off-site node are connected in a plurality of optical nodes connected to the optical network.

1 is a configuration example of an optical fiber network with optical nodes; It is an example of the configuration of an optical node arranged in a facility. It is an example of the connection information table of an internode connection management part, and its update. It is an example of the configuration of an optical node arranged in a facility. This is an example of the operation of an off-site optical node. (a) shows a state in which route A (ports 1 and 61) is connected, and (b) shows a state in which route A (ports 1 and 61) is connected to route B (ports 31 and 71), and (c) shows the state in which route B (ports 31 and 71) is connected. It is an operation example of an optical node in a normal state. It is an example of a connection information table of the in-house wiring management unit. It is an example of the optical power information of the port of the external node stored in the optical output value management unit. 1 is a configuration example of an optical fiber network with optical nodes; It is an example of the configuration of an optical node arranged in a facility. It is an example of operation of the optical node at the time of abnormality. It is an example of data stored in an inter-node core line usage status management unit. It is an example of the configuration of an optical node arranged in a facility. It is an example of data stored in an inter-node core line usage status management unit (extended version). It is an example of the configuration of an optical node arranged in a facility. It is an example of the configuration of an optical node arranged in a facility. It is an example of the configuration of an optical node arranged in a facility. It is an example of the configuration of an optical node arranged in a facility. It is an example of the configuration of an optical node arranged in a facility.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below. These implementation examples are merely illustrative, and the present disclosure can be implemented in various modified and improved forms based on the knowledge of those skilled in the art. In addition, in this specification and the drawings, constituent elements having the same reference numerals are the same as each other.

(First embodiment)
A first embodiment of the present disclosure will be described in detail.
FIG. 1 shows an example of an optical line switching node (hereinafter referred to as an optical node) installed inside and outside the station. One optical node 91 is placed inside the site, and one optical node 92 is placed outside the site. There is also a configuration in which a plurality of each of the on-site and off-site optical nodes are installed on the optical fiber network. Also, the optical node 91 in the facility is installed in an environment where power can be supplied. The optical node 92 outside the site is in an environment where commercial power cannot be used, and is driven by power supply light from within the site. Hereinafter, an optical node arranged inside the station will be called an "inside node", and an optical node arranged outside the station will be called an "external node".

The in-house node 91 and the off-site node 92 are connected by an optical fiber network. Although the optical fiber network can be of any form, the figure shows an example of a looped network configuration. The port 1 of the in-house node 91 and the port 1 of the out-of-site node 92 are connected by a route RA, and the port 31 of the in-house node 91 and the port 31 of the out-of-site node 92 are connected by a route RB different from the route RA. Transmission of communication light, transmission and reception of control signals, and power supply using optical signals are performed using the route RA or RB.

The present disclosure provides an optical network in which a plurality of optical nodes for switching optical lines are connected,
The multiple optical nodes are
an in-house node 91 installed in an environment capable of supplying power;
an offsite node 92 driven by light fed from an onsite node;
with
An in-house node 91 has a function group related to an optical cross-connect and a function group for remotely controlling an outside node, and switches the port of the in-house node 91 and the port of the outside node 92 by remote control.
Further, the on-site node 91 transmits the test light from the on-site node 91 or the termination box 93 connected to the on-site node to the off-site node, thereby connecting the port to which the on-site node 91 and the off-site node 92 are connected. It has a function to confirm.
Accordingly, the present disclosure enables confirmation of the ports to which the in-house node 91 and the out-of-site node 92 are connected.

　Fig. 2 shows a configuration example of the in-house node 91. In the figure, numbers in frames indicate port numbers. First, the function group for remotely controlling the offsite node 92 will be described. These functional groups comprise light source 21 , optical circulator 22 , optical receiver 24 and controller 25 . A laser beam emitted from the light source 21 passes through the optical circulator 22 and is input to an on-site termination rack (eg, IDM: Integrated Distribution Module) 93 through an optical fiber cable 82 functioning as an inter-rack cable. The termination rack 93 is connected to an offsite node 92 through an offsite optical fiber network via an optical fiber cable 83 that functions as a termination cable. Incidentally, the termination rack 93 may have the function of an optical coupler.

The light source 21 supplies optical power to the off-site node 92 . As a result, each function of the offsite node 92 can be driven. The light source 21 also transmits a control signal to the offsite node 92 . Thereby, remote control of the off-site node 92 is performed. On the other hand, when a control signal is transmitted from the off-site node 92 , it is input from the optical circulator 22 to the optical receiver 24 and received by the optical receiver 24 . The control signal transmitted from the off-site node 92 may include the optical power value measured by the optical port monitoring function unit provided in the off-site node 92 . The controller 25 has the function of controlling the light source 21 and the optical receiver 24 .

Next, the function group related to the optical cross-connect of the in-house node 91 will be explained. This functional group comprises an optical cross-connect section 11 having a cross-connect function of N input ports and M output ports, and an optical cross-connect control section 12 for controlling the optical cross-connect section 11 . The input ports and output ports of the optical cross-connect unit 11 can be identified by assigning numbers, for example. The upper side of the optical cross-connect section 11 is connected to various transmission devices through optical fiber cables 81 and 82 . In addition, the lower side is connected to an off-site node 92 via an on-site termination rack 93 having an optical coupler function via an optical fiber cable 82 and an optical fiber network including an off-site optical fiber cable 83. .

Furthermore, in the present disclosure, the in-house node 91 is provided with the in-house node integrated control unit 13 and the inter-node connection management unit 14 . The in-house node integrated control section 13 is connected to the controller 25 , the optical cross-connect section control section 12 and the node connection management section 14 . The node-to-node connection management unit 14 stores connection information between the on-site node 91 and the off-site node 92 . This connection information includes connection information with the external node 92 to which the device is connected, and may also include connection information with other internal nodes 91 .

When the on-premises node 91 and the off-premises node 92 switch from the route RA to the root RB shown in FIG. .
Next, referring to the information of the inter-node connection management unit 14 by means of a signal from the in-house node integrated control unit 13 (checking the connection of the in-house node #1 out port 31 and the out-of-site node #1 in port 31), The optical cross-connect control unit 12 switches the lower side of the optical cross-connect unit 11 in FIG.
Next, according to a signal from the in-house node integrated control unit 13, the out-of-house node 91 switches from the ports 1 and 61 to the ports 31 and 71 based on the signal from the controller 25 of the in-house node 91 node. After the switching, the information in the inter-node connection management section 14 is updated by the signal from the in-house node integrated control section 13 . FIG. 3 shows an example of the connection information table of the inter-node connection management unit 14 and its update.
As described above, in cooperation with the out-of-site node 92, switching of the route between the in-house node 91 and the out-of-site node 92 can be realized.

(Second embodiment)
A second embodiment of the present disclosure will be described in detail with reference to FIG.
In addition to the configuration of the on-premises node 91 described in the first embodiment, the on-premises node 91 has an on-premises wiring that holds mutual connection information between each port of the optical cross-connect section 11 and each port of the termination rack 93 . A management unit 15 is provided. Also provided is an optical output value management unit 16 that holds the optical power value of each port of the external node 92 in chronological order. The in-house wiring management unit 15 and the optical output value management unit 16 operate by being connected to the in-house node integrated control unit 13 described in the first embodiment.

In the on-site termination rack 93 such as the existing IDM rack, the test light and the like are combined into the optically terminated port connected to the optical fiber cable 83 connected to the outside and the optical fiber of the above-mentioned optical fiber cable 83. a fiber selector 32 that is connected to a plurality of optical couplers 31 and enables optical connection by switching light to a specific optical coupler; an optical test device 33 that emits test light; A device 33 and an optical test function controller 34 that controls the fiber selector 32 may be provided. The in-house node integrated control unit 13 operates the optical test equipment 33 and the fiber selector 32 through the optical test function control device 34, and emits light from the optical test equipment 33 through all the optical couplers 31 to which the fiber selectors 32 are connected. It takes a form in which test light can be inserted.

(Third Embodiment)
A third embodiment of the present disclosure will be described in detail.
In the second embodiment, as shown in FIG. 1, the on-site node 91 and the off-site node 92 switch from the route RA to the route RB, and in the process, as shown in FIG. Also, the operation procedure of the entire optical node inside and outside the station will be described with reference to FIG. 7 shows an example of connection information stored in the in-house wiring management unit 15. As shown in FIG. The ports 1 and 2 to 60 on the outside of the optical cross-connect section 11 shown in FIG. connection information.

FIG. 8 is an example of the optical power value of the port of the external node 92 stored in the optical output value management unit 16. FIG. Stores the optical power value for each port measured at the external node 92 together with the measurement time of the optical power value.

Step S11: Assume that the port 1 of the on-site node 91 and the port 1 of the off-site node 92 are connected, and the port 1 and port 61 of the off-site node 92 are connected (state of the route RA in FIG. 1). In the in-house node 91, the ports 101 and 1 of the optical cross-connect section 11 and the ports 11 and 1 of the termination rack 93 of FIG. 4 are connected. Focusing on the inside of the external node 92, the port 1 and the port 61 are connected through the optical cross-connect section 211 as shown in FIG. 5(a).

Step S12: The controller 25 of the in-house node 91 transmits a control signal to measure the optical power values of all ports according to the signal from the in-house node general control unit 13 . The optical port monitoring function unit 212 of the offsite node 92 measures the optical power values received at all the ports of the offsite node 92 according to the control signal received by the microprocessor 225 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The in-house node general control unit 13 records the optical power value returned through the controller 25 in the optical output value management unit 16 together with the reception time of the optical power value. As a result, the optical power values received by all the ports of the off-site node 92 are stored in the optical output value management unit 16 together with the measurement time of the optical power values.

Step S13: Refer to the information of the on-site wiring management unit 15 by the signal of the on-site node integrated control unit 13 (as shown in FIG. 7, the port of the termination rack 93 connected to the port 1 of the on-site node 91 is 11), the optical test function controller 34 connects the fiber selector 32 to the optical coupler 31 of the port 1 on the off-site node 92 side of the termination rack 93, and sends the test light to the optical coupler 31. insert The optical port monitoring function unit 212 of the offsite node 92 measures the optical power values of all the ports of the offsite node 92 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

FIG. 8 shows an example of the optical power value of the port of the external node 92 stored in the optical output value management unit 16. FIG. As shown in FIG. 8, the measurement data of all the ports before and after the insertion of this test light are compared. Confirm that the optical power value has increased from before the insertion of This makes it possible to confirm that the port 1 of the in-house node 91 and the ports 1 and 61 of the out-of-house node 92 are connected.

Step S14: After referring to the information in the inter-node connection management section 14 by means of a signal from the in-house node total control section 13, the optical cross-connect control section 12 causes the in-house node 91 to control the lower portion of the optical cross-connect section 11 in FIG. side from port 1 to port 31. As a result, the ports 101 and 31 of the optical cross-connect section 11 and the ports 41 and 31 of the termination rack 93 shown in FIG. 4 are connected.

Step S15: The controller 25 of the in-house node 91 transmits a control signal for port switching according to the signal from the in-house node integrated control unit 13 . The optical cross-connect unit 211 of the external node 92 switches from ports 1 and 61 to ports 31 and 71 according to the control signal received by the microprocessor 225, as shown in FIG. 5(b). As a result, as shown in FIG. 5C, the ports 31 and 71 are connected through the optical cross-connect section 211, and the route RB in FIG. 1 is connected.

Step S16: The controller 25 of the in-house node 91 transmits a control signal for measuring the optical power values of all ports according to the signal from the in-house node general control unit 13 . The optical port monitoring function unit 212 of the offsite node 92 measures the power values received at all the ports of the offsite node 92 according to the control signal received by the microprocessor 225 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

Step S17: The optical test function control device 34 refers to the information of the on-site wiring management unit 15 according to the signal from the on-site node integrated control unit 13, and connects the fiber selector 32 to the optical coupler 31 of the port 41 of the termination rack 93. Then, the test light is inserted into the optical coupler 31 to which the port 31 of the in-house node 91 is connected. The optical port monitoring function unit 212 of the offsite node 92 measures all the optical ports of the offsite node 92 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

The on-site node integrated control unit 13 compares the measurement data of all ports before and after the test light is inserted, and the optical power values of the ports 31 and 71 of the off-site optical node are compared with the light power values before the test light is inserted. Confirm that it is increasing from the power value. As a result, it can be confirmed that the port 31 of the in-house node 91 and the port 31 and port 71 of the out-of-house node 92 are connected.

As described above, in addition to realizing route switching by linking the external node 92 and the internal node 91, the connection state between the ports can be confirmed by confirming the optical output value using the test light before and after the switching. can be realized.

(Fourth embodiment)
A fourth embodiment of the present disclosure will now be described with reference to FIGS. 9-12. As shown in FIG. 9, it is assumed that a failure occurs in the path of the route RA and an optical signal is interrupted.

In the third embodiment, as shown in FIG. 10, the function of the in-house node 91 is provided with the inter-node core line usage status management unit 17 and the abnormality detection unit 18 . As shown in FIG. 12, the inter-node core line usage status management unit 17 indicates whether or not the service of each core line connecting the optical nodes is used. In addition, the abnormality detection unit 18 cooperates with the in-house node integrated control unit 13 and has a function of detecting the occurrence of a failure. The operating procedure is shown along FIG.

Step S21: Assume that the port 1 of the on-site node 91 and the port 1 of the off-site node 92 are connected, and the port 1 and port 61 of the off-site node 92 are connected (state of the route RA in FIG. 9). In the in-house node 91, the port 101 and the port 1 of the optical cross-connect section 11 of FIG. 10 and the port 11 and the port 1 of the termination rack 93 are connected.

Step S22: The controller 25 of the in-house node 91 transmits a control signal to measure the optical power values of all ports according to the signal from the in-house node integrated control unit 13 . The optical port monitoring function unit 212 of the offsite node 92 measures the optical power values received at all the ports of the offsite node 92 according to the control signal received by the microprocessor 225 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

Step S23: By means of a signal from the on-site node integrated control section 13, the optical test function control device 34 refers to the information on the on-site wiring management section 15, and connects the fiber selector 32 to the optical coupler 31 of the port 1 of the termination rack 93. Then, test light is inserted into the optical coupler 31 . The optical port monitoring function unit 212 of the offsite node 92 measures the optical power values of all the ports of the offsite node 92 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

The measured data of all ports before and after the test light insertion were compared, and the test light was inserted, but the optical power values of the ports 1 and 61 of the external node 92 were the same as the optical power values before the test light was inserted. Suppose that In this case, the connection between the port 1 of the on-site node 91 and the ports 1 and 61 of the off-site node 92 cannot be confirmed, and it is assumed that there is some kind of failure on the route RA.

Step S24: The abnormality detection unit 18 refers to the inter-node core line usage status management unit 17 and searches for optical fiber core lines that are not used for services. As shown in FIG. 12, the port 31 of the in-house node 91 and the out-of-house node 92 of the item number 1031 corresponds to the case where there is a corresponding result. This result is transmitted to the in-house node integrated control unit 13 . If there is a corresponding port, the process proceeds to step S25. If there is no corresponding port, the process proceeds to step S29.

Step S25: With reference to the information in the inter-node connection management section 14, the optical cross-connect control section 12 causes the lower side of the optical cross-connect section 11 shown in FIG. Switch to port 31. As a result, the ports 101 and 31 of the optical cross-connect section 11 and the ports 41 and 31 of the termination rack 93 shown in FIG. 10 are connected.

Step S26: The controller 25 of the in-house node 91 transmits a control signal for port switching according to the signal from the in-house node integrated control unit 13 . The optical cross-connect unit 211 of the external node 92 switches from ports 1 and 61 to ports 31 and 61 in response to a control signal from the microprocessor 225 .

Step S27: The controller 25 of the in-house node 91 transmits a control signal to measure the optical power values of all ports according to the signal from the in-house node general control unit 13 . The optical port monitor 212 of the offsite node 92 measures the optical power values received at all the ports of the offsite node 92 according to the control signal received by the microprocessor 225 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

Step S28: By means of a signal from the on-site node integrated control unit 13, after referring to the information on the on-site wiring management unit 15, the optical test function control device 34 connects the fiber selector 32 to the optical coupler 31 of the port 41 of the termination rack 93. Then, the test light is inserted into the optical coupler 31 to which the port 31 of the in-house node 91 is connected. The optical port monitoring function unit 212 of the offsite node 92 measures all the optical ports of the offsite node 92 . The microprocessor 225 of the out-of-home node 92 returns the measurement result of the optical power value to the controller 25 of the in-home node 91 . The returned optical power value is stored in the optical output value management unit 16 together with the measurement time of the optical power value through the in-house node general control unit 13 .

The on-premises node integrated control unit 13 compares the measurement data of all ports before and after the test light is inserted, and the optical power values of the ports 31 and 61 of the off-premises node 92 are equal to the optical powers before the test light is inserted. Check for variation by comparing values. If it has increased, it can be confirmed that the port 31 of the in-house node 91 and the port 31 and port 71 of the out-of-house node 92 are connected. If the number does not increase, the process returns to step S24 to search for another optical fiber cable that is not used for service.

Step S29: If there is no optical fiber that is not used for service, or if it is confirmed that the optical power value of all the optical fibers that are not used for service does not increase even when the test light is inserted in step S28, The abnormality detection unit 18 notifies the in-house node integrated control unit 13 of a message notifying that the abnormality such as route change impossibility and route repair is required.

As described above, when a route fault occurs, it is possible to switch to a route that is not used for services and that is not faulty, If there is no route that does not exist, it is possible to detect an abnormality.

(Fifth embodiment)
A fifth embodiment will be described with reference to FIGS. 13 and 14. FIG. In the third embodiment, the in-house node 91 is provided with the inter-node fiber usage status management unit 17 and the fiber distribution function unit 19 . As shown in FIG. 14, the inter-node core line usage status management unit 17, in addition to the information example stored in the inter-node core line usage status management part 17 described in the fourth mode, includes the direction of the loop network configuration. As a property, either the right rotation direction or the left rotation direction is stored. Assuming that the optical fiber cable connected between the nodes is a loop network such as the optical network between the on-site node 91 and the off-site node 92 shown in FIG. Since there is a two-way route of the root RB of the RB, it is information for clarifying it.

When it is necessary to establish a new route between the on-site node 91 and the off-site node 92 as shown in FIG. A core line to be switched is selected from among them and notified to the in-house node integrated control unit 13 . The in-house node integrated control unit 13 changes the port in which the abnormality is detected by the abnormality detection unit 18 to the port to which the core wire selected by the core distribution function unit 19 is connected.

Here, the selection of the fiber distribution function unit 19 is based on, for example, the number of clockwise and counterclockwise fiber cores between optical nodes, the number of each service used or not used, or the ratio of both. Based on, for example, the number of optical fibers used for clockwise rotation and the number of optical fibers used for counterclockwise rotation are determined by a policy such as determining the core number to be used so that the number of optical fibers used is not biased (e.g. In-house node #1 port 60, out-of-site node #1 port 60), and notify the in-house node integrated control unit 13 of the number.

As described above, in the loop wiring, the ratio of the optical fibers used is not biased toward the clockwise or counterclockwise rotation. Alternatively, it is possible to use so that the ratio of the number of optical fibers that are not used for service of the optical fiber core wires in both directions is constant.

(Sixth embodiment)
A sixth embodiment will be described along FIG. In the second to fifth embodiments, an optical test function control section 134 functioning as the optical test function control device 34, an optical test function section 133 functioning as the optical test function device 33, and a fiber selector section 132 functioning as the fiber selector 32. is a configuration added to the function of the optical node in the station. That is, in comparison with FIG. 4, FIG. 10, or FIG. 13, a fiber selector unit 132 connected to a plurality of optical couplers 31 and capable of switching and connecting light to the specific optical coupler 31, and a test light An optical test function unit 133 that emits light and an optical test function control unit 134 that controls the optical test function unit 133 and the fiber selector unit 132 are added to the in-house node 91 . The in-house node integrated control unit 13 controls the optical test function unit 133 and the fiber selector unit 132 through the optical test function control unit 134, and inserts the optical test light through all the optical couplers 31 to which the fiber selector unit 132 is connected. take any form possible. Note that FIG. 15 shows a configuration added to FIG. 10 .

(Seventh embodiment)
A seventh embodiment will be described along FIG. In the sixth embodiment, the optical coupler section 131 and the termination function section 193 are added to the functions of the in-house node 91 . That is, compared with FIG. 15, a termination function unit 193 for connecting to the optical fiber cable 83 connected to the off-site node 92, and an optical coupler unit 131 for multiplexing the test light and the like to the optical fiber cable 83 are provided. , are added to the functions of the in-house node 91 .

As shown in FIG. 16, a fiber selector unit 132 connected to a plurality of optical coupler units 131 and capable of switching and connecting light to a specific optical coupler unit 131, an optical test function unit 133 for emitting test light, and an optical test function control unit 134 that controls the optical test function unit 133 and the fiber selector unit 132 . Also, the optical coupler section 131 is normally connected to each port of the optical termination function section 193 . Also, each port of the optical termination function unit 193 can be identified by being given an individual number, for example. The upper port of the optical termination function section 193 is connected to the port of the optical cross-connect section 11 through the optical fiber cable 182 . The port on the lower side is connected to an off-site optical fiber network through an optical fiber cable 83 and further connected to an off-site node 92 . The in-house node integrated control unit 13 controls the optical test function unit 133 and the fiber selector unit 132 through the optical test function control unit 134, and transmits the optical test light through all the optical coupler units 131 to which the fiber selector unit 132 is connected. It takes a form that can be inserted.

(Eighth embodiment)
An eighth embodiment will be described along FIG. In the first to seventh embodiments, the optical selector 23 is added to the local node 91 . 17 shows a configuration in which an optical selector 23 is added to the configuration of FIG.

The optical fiber cables 82-1 and 82-2 connected to the optical selector 23 are connected to optical fiber cables 83-1 and 83-2, respectively. The optical fiber cable 83-1 is connected to the offsite node 92#1, and the optical fiber cable 83-2 is connected to the offsite node 92#2.

The controller 25 has a function of controlling the optical selector 23, and can change the port of the termination function section 193 to which the laser light from the light source 21 is input by the optical selector 23. It becomes possible to transmit laser light from a single light source 21 to a plurality of offsite nodes 92 through the core line.

(Ninth embodiment)
A ninth embodiment will be described along FIG. In the first to eighth embodiments, the in-house node 91 includes the in-house node integrated control unit 13, the inter-node connection management unit 14, the in-house wiring management unit 15, the optical output value management unit 16, the inter-node core line usage status It is assumed that the configuration is composed only of the management unit 17 and the abnormality detection unit 18 . Here, instead of the abnormality detection section 18, or together with the abnormality detection section 18, the fiber distribution function section 19 may be provided.

A group of remote control functions such as the controller 25, a group of optical cross-connect functions such as the optical cross-connect control unit 12, and a group of optical test functions such as the test function control unit 134 are configured in separate housings in the in-house node integrated control unit 13. is characterized by operating in cooperation with the controller 25, the optical cross-connect control unit 12, and the test function control unit .

In this way, all or part of the light source 21 and controller 25, the optical cross-connect section 11 and optical cross-connect control section 12, the in-house node integrated control section 13 and the inter-node connection management section 14 are integrated into a single It may be stored in another housing without being stored in the housing.

(Tenth embodiment)
A tenth embodiment will be described along FIG. In the first to ninth embodiments, the inter-node connection management unit 14, the in-house wiring management unit 15, the optical output value management unit 16, and the inter-node core line usage status management unit 17 are housed in the same housing as the in-house node 91. It takes the form of exchanging information in a state where it is not configured and is stored in another device such as another server through a network. FIG. 19 shows the case of the embodiment applied to FIG.

In this way, all or part of the inter-node connection management unit 14 may not be stored in the same housing as the optical cross-connect unit 11, but may be stored in another housing through the network.

The optical node of the present disclosure can also be realized by a computer and a program, and the program can be recorded on a recording medium or provided through a network.

(Effect of the present disclosure)
In a plurality of optical nodes connected to an optical network, the on-site node 91 and the off-site node 92 are connected by transmitting test light from the on-site node 91 installed inside the site to the off-site node 92 installed outside the site. After confirming the port that is being controlled, the port of the in-house node 91 is switched, the port of the out-of-site node 92 is switched to remote control, and after changing the route of the light, the test light is transmitted again. It is possible to confirm the port to which the external node 92 is connected.

This disclosure can be applied to the information and communications industry.

11: Optical cross-connect unit 111: Optical port monitoring function unit 12: Optical cross-connect control unit 13: In-house node integrated control unit 14: Inter-node connection management unit 15: In-house wiring management unit 16: Optical output value management unit 17: Node Core line usage status management unit 18: Abnormality detection unit 19: Core line distribution function unit 21: Light source 22: Optical circulator 23: Optical selector 24: Optical receiver 25: Controller 31: Optical coupler 32: Fiber selector 33: Light Test function device 34: Optical test function controllers 81, 82, 83, 182: Optical fiber cable 91: On-site node 92: Off-site node 93: Termination box 132: Fiber selector unit 131: Optical coupler unit 133: Optical test function Unit 134: Optical test function control unit 211: Optical cross connect unit 212: Optical port monitoring function unit 225: Microprocessor

Claims (11)

1. The optical node provided in an optical fiber network in which a plurality of optical nodes are connected,
   an optical cross-connect unit connected to an optical node other than the own device among the plurality of optical nodes and switching a port connected to the other optical node by an optical fiber core;
   an optical cross-connect control unit that controls the optical cross-connect unit;
   an inter-node connection management unit that stores the mutual connection state of each port of the device and the other optical node;
   Control for connecting to the other optical node by an optical fiber core wire different from the optical cross-connect unit, optically supplying power to the other optical node, and switching the port connected to the own device by the optical fiber core wire a light source that transmits signal light to the other optical node;
   an optical receiver that receives information on the optical power value measured at the port after switching in the other optical node;
   a controller that controls the light source and the optical receiver;
   In-house node total control for controlling the controller and the optical cross-connect control unit to switch the port connecting the own device and the other optical node, and acquiring the information of the optical power value received by the optical receiver Department and
   An optical node comprising:
2. an optical output value management unit that stores the optical power value received by the optical receiver in association with the port of the other optical node and the measurement time;
   The in-house node integrated control unit checks the connection state of the port of the other optical node by determining a change in the optical power value stored in the optical output value management unit,
   The optical node according to claim 1.
3. an inter-node core line usage status management unit that stores whether or not an optical fiber core line service connecting between the device itself and the other optical node is used;
   an anomaly detection unit that detects an anomaly in the port of the other optical node based on the determination result of the optical power value change in the on-site node integrated control unit;
   When an abnormality is detected, the abnormality detection unit detects an optical fiber core line not used for service from among the ports of the other optical node based on the information stored in the inter-node core line usage status management unit. select the port of the
   The in-house node integrated control unit
   changing the port in which the abnormality is detected by the abnormality detection unit to the port selected by the abnormality detection unit;
   confirming the connection state of the port of the optical fiber core wire selected by the abnormality detection unit by determining the change in the optical power value at the port after the change;
   The abnormality detection unit notifies the in-house node integrated control unit that the abnormality has not been resolved when the abnormality is not resolved even by changing the port,
   3. An optical node according to claim 2.
4. a fiber distribution function unit that operates by mutually exchanging signals with the in-house node integrated control unit;
   The inter-node core line usage status management unit further stores whether the optical fiber core line is in the clockwise or counterclockwise rotation direction of the loop network configuration,
   The fiber sorting function unit
   (i) the number of optical fibers in each rotational direction stored in the inter-node core line usage status management unit;
   (ii) the number of optical fiber cores used for service;
   (iii) the number of optical fiber cores not used for service;
   (iv) percentage of service usage in each direction of rotation;
   Selecting an optical fiber core wire to be switched from optical fiber core wires not used for service based on at least one of
   The in-house node integrated control unit changes the port in which the abnormality is detected by the abnormality detection unit to the port connected to the optical fiber core wire selected by the fiber distribution function unit. ,
   4. An optical node according to claim 3.
5. The optical cross-connect unit is connected to the optical fiber network through a termination rack to which optical fiber cables included in the optical fiber network are connected,
   an on-premises wiring management unit that stores mutual connection information between the ports of the optical cross-connect unit and the ports of the termination rack;
   The in-house node integrated control unit controls the port of the termination rack through which the test light is incident from the optical test equipment,
   The connection state of the port after switching is confirmed by determining a change in the optical power value in the optical output value management unit due to the test light from the optical test device,
   5. An optical node according to any one of claims 2 to 4.
6. an optical test function unit that emits test light;
   a fiber selector unit that connects one of the optical fiber core wires connected to the other optical node to the optical test function unit;
   an optical test function control unit that controls the fiber selector unit and the optical test function unit;
   and
   The in-house node integrated control unit,
   controlling the optical test function unit and the fiber selector unit through the optical test function control unit;
   inserting an optical test light into an arbitrary optical fiber connected by the fiber selector;
   The connection state of the port after switching is confirmed by determining a change in the optical power value in the optical output value management unit due to the test light from the optical test function unit,
   5. An optical node according to any one of claims 2 to 4.
7. a termination function section to which optical fiber cables included in the optical fiber network are connected;
   an optical coupler section for multiplexing the test light from the optical test function section to any one of the optical fiber core wires included in the optical fiber cable;
   characterized by comprising
   7. An optical node according to claim 6.
8. characterized by comprising an optical selector that switches an optical path from the light source to the other optical node,
   An optical node according to any one of claims 1 to 7.
9. the light source and the controller;
   the optical cross-connect unit and the optical cross-connect control unit;
   the in-house node integrated control unit;
   the inter-node connection management unit;
   All or part of is stored in another housing without being stored in a single housing,
   9. An optical node according to any one of claims 1-8.
10. All or part of the inter-node connection management unit is not stored in the same housing as the optical node, but is stored in a separate housing via a network and functions,
    10. An optical node according to any one of claims 1-9.
11. A method performed by an optical node in an optical fiber network to which a plurality of optical nodes are connected, comprising:
    The in-house node integrated control unit provides an optical cross-connect unit connected to an optical node other than the own device among the plurality of optical nodes, and provides a port connected to the other optical node by an optical fiber core line. let me switch
    The in-house node integrated control unit instructs the light source to optically supply power to the other optical node and to transmit control signal light to the other optical node to switch the port connected to the device by the optical fiber core line. , let it go,
    An optical receiver receives an optical power value measured at a switched port in the other optical node;
    the in-house node integrated control unit acquires information on the optical power value received by the optical receiver, thereby confirming the port connected to the other optical node;
    Storing the mutual connection state of each port of the own device and the other optical node in the inter-node connection management unit;
    Method.

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