JP5634136B2 - Optical switch system, optical switch system management control device, and management control method - Google Patents

Description

  The present invention relates to an optical switch system constituting an optical node in a photonic network.

  FIG. 1 shows a configuration example of a conventional photonic NW. As shown in FIG. 1, the photonic NW is composed of a plurality of optical nodes and optical fibers connecting the optical nodes.

  When a client signal is transferred via the photonic NW, the client signal is converted into an optical signal at the optical node that transmits the signal, and the converted optical signal is received from the transmitting optical node. The optical signal is transferred to the optical node without being converted into electricity, and is converted from an optical signal to a client signal at the receiving optical node. At this time, the path of the optical signal from the transmission optical node to the reception optical node is called an optical path, and the optical signal is called an optical path signal.

  In the photonic NW of FIG. 1, a reconfigurable optical add / drop multiplexer (ROADM) node is used as an optical node. The ROADM node is a node that can branch and insert an optical path signal in wavelength units from a wavelength multiplexed signal (WDM signal) transferred from an adjacent ROADM node and transfer the wavelength multiplexed signal to another adjacent ROADM node. . ROADM nodes include 2-degree ROADM that can be connected to two adjacent ROADM nodes, and Multi-degree ROADM that can be connected to three or more adjacent ROADM nodes. By these ROADM nodes, ring NW, multi-ring NW Can build a mesh NW. Note that “degree” in 2-degree ROADM, Multi-degree ROADM, etc. means the number of routes, and corresponds to the number of adjacent ROADM nodes to which the ROADM node can be connected.

  FIG. 2 shows a configuration example of a conventional Multi-degree ROADM node. As shown in FIG. 2, this Multi-degree ROADM node transmits to an adjacent node, or transmits an optical amplifier 1 that amplifies a WDM signal received from the adjacent node, and converts a client signal into an optical path signal. It comprises a transmitter 2, a receiver 3 that receives an optical path signal and converts it into a client signal, and means for switching the path of the optical path signal.

  In the configuration example shown in FIG. 2, the optical coupler 4, 1 × 9 WSS5, and 9 × 1 WSS6 are used as means for switching the path of the optical path signal. Here, the WSS (Wavelength Selective Switch) is a switch that can input / output WDM signals at each input / output port and select an input or output port by wavelength within the switch. WSS of input 1 port output 9 port is 1x9 WSS, and WSS of input 9 port output 1 port is 9x1 WSS.

  In the configuration example shown in FIG. 2, the transmitter 2 is provided with a colorless function capable of transmitting an optical path signal of an arbitrary wavelength and receiving the optical path signal of an arbitrary wavelength at the receiver 3. In addition to the configuration shown in FIG. 2, the configuration of the optical node includes a ROADM node without a colorless function and a 2-degree ROADM node.

E. Bert. Basch, et.al, "Architectural Tradeoffs for Reconfigurable Dense Wavelength-Division Multiplexing Systems", IEEE J. of selected topics in Quantum electronics. Vol. 12, No.4, JULY / AUGUST 2006

  An optical node manufacturer sometimes manufactures an optical node by manufacturing from an optical switch. Usually, an optical node manufacturer is provided with an optical switch system in which one or a plurality of optical switches are combined. Manufacturing. However, this optical switch system has the following problems.

  (1) When the Degree number of the ROADM node changes, the node configuration changes depending on the presence or absence of various functions (colorless function, directionless function, etc.), and the configuration of the optical switch system used for the ROADM node also changes. In addition, even if the Degree number and presence / absence of various functions are the same, in the configuration of FIG. 2, a node may be manufactured by another configuration such as using WSS instead of the optical coupler 4. The system configuration will also change.

  (2) Functions and controls required for the optical switch system differ depending on the operation mode of the ROADM node.

  Thus, when the required optical switch system is diversified in terms of configuration, function, and control, the optical switch system manufacturer designs and manufactures the optical switch system separately according to the optical node. It is necessary, and the cost and time are enormous. In addition, NW operation forms are diversified, and it may occur that NW operation side needs to change the operation form, but in the prior art, it is necessary to redesign and remanufacture the optical switch system, It took time and cost to change the operation mode.

  The present invention has been made in view of such problems, and can design and manufacture an optical switch system having various configurations and various functions and controls at low cost in a short time. The purpose is to realize an optical switch system that can flexibly cope with diversified NW operation modes.

In order to solve the above-described problems , the present invention provides an optical switch system used in an optical node constituting a photonic network, wherein the optical switch system has a function of branching an optical path or switching a path. Side path switching SW function unit, merged side path switching SW function unit that performs optical path insertion or path switching, and optical path branched by the branch side path switching SW function unit, to which the receiver is connected And the optical path input from the port connected to the transmitter is classified into the merging-side wavelength allocation SW function unit connected to the merging-side path switching SW function unit. A control unit configured to perform management control of the optical switch system using a management model, the control unit configured to perform management control in the optical switch system on the management model; Each function Separately performs logical management control, holds information on a management model function unit to be controlled by the control function unit, and information on a physical configuration corresponding to each function unit on the management model in the optical switch system. And a physical configuration-dependent absorption function unit that performs conversion between each function unit on the management model, and the control unit holds procedure information representing a control procedure for each function unit of the optical switch system, An optical switch control unit that controls each function unit in a procedure according to the procedure information. The management model function unit receives a path setting request from the control function unit, and sets an input / output port number to be set. Extract, determine whether a path can be set between input and output ports, send a path setting request that can be set to the physical configuration dependent absorption function unit, and the physical configuration dependent absorption function unit sets An optical device and an output port number of the optical device may be configured as an optical switch system and extracts should.

  Further, the control means in the optical switch system may be configured to hold setting state transition information representing a setting state transition condition of the optical switch system, and perform setting state transition according to the setting state transition information. .

Also, the present invention provides an optical switching system management controller for managing control of the optical switch system used in the optical nodes of the photonic network, the function of the optical switch system, branched or square of light path A branch side route switching SW function unit for performing path switching, a merge side route switching SW function unit for inserting or switching optical paths, and an optical path branched by the branch side route switching SW function unit, A branch-side wavelength assignment SW function unit connected to the port to which the transmitter is connected, and a join-side wavelength assignment SW that connects the optical path input from the port to which the transmitter is connected to the join-side route switching SW function unit Using a management model classified into functional units, a control function unit that performs management control in the optical switch system on the management model, and performs logical management control for each functional unit on the management model, and the control function Part The management model function unit to be controlled and the physical configuration information corresponding to each function unit on the management model in the optical switch system are retained, and conversion between the physical configuration and each function unit on the management model is performed. A physical configuration-dependent absorption function unit that performs, holds procedure information representing a control procedure for each function unit of the optical switch system, and performs control for each function unit in a procedure according to the procedure information. An optical switch system management control device that performs management control of an optical switch system, wherein the management model function unit receives a path setting request from the control function unit, extracts an input / output port number to be set, and an input / output port A path setting request that can be set is transmitted to the physical configuration dependent absorption function unit, and the physical configuration dependent absorption function unit It can be configured as an optical switch system management controller and extracting the optical device with input and output port number of the optical devices.

  The present invention can also be configured as a management control method performed by the optical switch system or the optical switch system management control device.

  According to the present invention, it is possible to design and manufacture an optical switch system having various configurations and various functions and controls at a low cost in a short time, and is flexible with respect to diversified NW operation modes. It is possible to realize an optical switch system that can cope with the above.

It is a figure which shows the structural example of the conventional photonic NW. 1 is a diagram illustrating a configuration example of a conventional Multi-degree ROADM node 10. FIG. It is a figure which shows an example of a structure of an optical node. It is a figure which shows an example of a structure of an optical node. 2 is a diagram illustrating a management model of an optical node 300. FIG. It is a figure for demonstrating application of the management model with respect to an optical switch system. It is a figure which shows the management model application example 1. FIG. It is a figure which shows the management model application example 2. FIG. It is a figure which shows the management model application example 3. FIG. It is a figure which shows the management model application example 4. FIG. It is a figure which shows the management model application example 5. FIG. It is a figure which shows the structural example of the optical switch system to which the management model is applied. It is a figure which shows the detailed structural example of the optical switch system to which the management model is applied. It is a sequence diagram which shows an example of the optical path setting procedure at the time of applying a management model. It is a figure for demonstrating the example of application of the management model in case a monitor function is included in an optical switch system. It is a figure for demonstrating the example of application of the management model in case a monitor function is included in an optical switch system. It is a figure which shows the example of the table which described the control procedure with respect to each function part. It is a figure which shows the example of the optical switch system to which the management model is applied. It is a figure which shows the example of the table which described the conditions of state transition.

  Examples 1 to 6 as embodiments of the present invention will be described below with reference to the drawings. Hereinafter, each example will be described separately, but these examples can be combined with each other.

(Example 1)
[Optical node configuration, optical switch system configuration]
FIG. 3A and FIG. 3B are diagrams each showing a node configuration of a multi-degree ROADM having three routes having a colorless function as an example of the configuration of the optical node.

  Each of the optical nodes 100 and 200 shown in FIGS. 3A and 3B includes an optical amplifier, a 1 × 9 WSS, a 9 × 1 WSS, a receiver, and a transmitter as a configuration for transmitting and receiving an optical signal.

  The optical nodes 100 and 200 include node management control units 110 and 210 that manage the entire optical node. The node management control unit controls a transmitter, a receiver, an optical amplifier, an optical switch, and the like. However, normally, all optical switches are not individually controlled from the node management control unit, but the node management control unit does not control the optical switch system as one or a plurality of optical switches. Control is performed to reduce the processing load of the node management control unit. The node management control unit is not necessarily provided in the optical node, but may be provided outside the optical node and connected to the optical node via a data communication network.

  There are various combinations of optical switches in the optical switch system. In the configuration of FIG. 3A, all optical switches in the optical node 100 are combined into one optical switch system 101. In the configuration of FIG. One optical switch system is provided for each, and in this example, optical switch systems 201, 202, and 203 are provided.

  The optical switch system has an optical switch control unit that manages and controls one or a plurality of optical switches in the optical switch system, and the node management control unit communicates with the optical switch control unit, Controls the optical switch system. In the configuration of FIG. 3A, the optical switch system 101 includes the optical switch control unit 111, and in the configuration of FIG. 3B, the optical switch systems 201, 202, and 203 include the optical switch control units 211, 212, and 213. . Note that the optical switch control unit is not necessarily provided in the optical switch system, but may be provided outside the optical switch system and connected to the optical switch system via a data communication network.

[Management model]
FIG. 4 shows a management model of the optical node 300. The management model is a model in which the functional configuration of the optical node is classified into a plurality of functions when managing and controlling the optical node. Based on the functional configuration classified by the management model, management control of the optical node 300 is performed. The contents of management control using the management model will be described in detail in a later embodiment.

As shown in FIG. 4, based on the management model in this embodiment, the function of the optical node 300 is
(1) An amplifier function unit 10 that amplifies the wavelength multiplexed signal received from the adjacent node and amplifies the wavelength multiplexed signal transmitted to the adjacent node;
(2) a transmission function unit 20 that converts a client signal into an optical path signal;
(3) a receiving function unit 30 for converting an optical path signal into a client signal;
(4) Monitor function unit 40 for measuring the quality of the optical path signal;
(5) A route switching SW for setting to send to the reception function unit 30 (branch) or to send to a different adjacent node (route switching) from the wavelength multiplexed signal received from the adjacent node in units of optical path signals (wavelength units) (Branch) function unit 50;
(6) Select (insert) a signal sent from the transmission function unit 20 or select a signal received from an adjacent node (route switching) as a wavelength multiplexed signal to be transmitted to the adjacent node in units of optical path signals. Route switching SW (merging) function unit 60 for setting;
(7) A wavelength assignment SW (branch) function unit 70 that connects the optical path signal branched by the path switching SW (branch) function unit 50 to a port to which a receiver that receives the optical path signal is connected;
(8) A wavelength assignment SW (merging) function unit 80 for connecting an optical path signal input from a port to which a transmitter is connected to a route switching SW (merging) function unit;
are categorized.

  In FIG. 4, a portion corresponding to the optical switch system 101 in FIG. 3A is indicated by a dotted line as the optical switch system 310. The optical switch system 310 includes a route switching SW (branch) function unit 50, a route switching SW (merging) function unit 60, a wavelength allocation SW (branching) function unit 70, and a wavelength allocation SW (merging) function unit 80. Includes four functions. When the optical switch system 310 includes an optical amplifier, the amplifier function unit 10 is further included. When the optical switch system 310 includes an optical path signal quality measurement function, the monitor function unit 40 is further included. .

4 shows input / output ports for optical signals (optical path signals or signals obtained by wavelength multiplexing optical path signals) of the respective functional units in the optical node 310. As input / output ports of each SW function part (50, 60, 70, 80),
(A) Input route: Input of the route switching SW (branch) function unit 50;
(B) XC output route: output of the route switching SW (branch) function unit 50 (route switching SW (merging) function unit 60 side);
(C) XC input route: input to the route switch SW (merging) function unit 60 (route switch SW (branch) function unit 50 side);
(D) Output route: output of the route switching SW (merging) function unit 60;
(E) Reception port: Output of wavelength allocation SW (branch) function unit 70;
(F) Transmission port: Input of wavelength allocation SW (confluence) function unit 80;
(G) Branching output route: output of the route switching SW (branch) function unit 50 (wavelength assignment SW (branch) function unit 70 side);
(H) Input route for insertion: input of the route switching SW (merging) function unit 60 (wavelength assignment SW (merging) function unit 80 side);
(I) Branching input route: input to the wavelength allocation SW (branching) function unit 70;
(J) Output path for insertion: output of wavelength allocation SW (merging) function unit 80;
There is.

  In the optical switch system 310 of FIG. 4, as input / output ports of the optical switch system 310, (A) input routes 1 to N (N is the number of routes), (D) output routes 1 to N (N is Number of routes), (E) receiving ports 1 to M (M is the number of connectable receivers), and (F) transmitting ports 1 to M (M is the number of connectable transmitters). .

  FIG. 5 shows an application example of the management model when there is an optical switch system for each route as in the configuration example of FIG. 3B. Similar to the optical switch system described in FIG. 4, this optical switch system includes a path switching SW (branch) function unit 50, a path switching SW (merging) function unit 60, a wavelength allocation SW (branching) function unit 70, The wavelength allocation SW (merging) function unit 80 has four functional units. In addition, as the input / output ports for optical signals, there are one (A) input route and one (D) output route. (E) Receiving ports 1 to M (M is the number of connectable receivers), (F) Transmission ports 1 to M (M is the number of connectable transmitters), (B) XC output routes 1 to N (N is the number of routes), (C) XC input route 1 ~ N (N is the number of routes).

  Hereinafter, it will be described by way of example that the management model according to the present invention can be applied to various types of optical switch systems.

[Example 1: Number of routes M, with colorless function]
FIG. 6A shows a case where the number of routes is M (= 3) and there is an optical switch system for each route in the node having the colorless function (same as FIG. 3B). In this case, in the figure, 1x9 WSS (1) is route switching SW (branch) function unit 50, 9x1 WSS (2) is route switching SW (merging) function unit 60, 1x9 WSS (2), and 1x9 WSS ( 3) manages the wavelength allocation SW (branch) function unit 70, 9x1 WSS (2), and 9x1 WSS (3) as the wavelength allocation SW (merging) function unit 80. In the management model, as an optical switch system, the input port is designated by the input route (A), the input route for XC (C), and the transmission port (F), and the output port is designated by the output route (D), Designate with XC output route (B) and receive port (E).

[Application example 2: When the number of routes is M and there is no colorless function]
FIG. 6B shows a case where there is an optical switch system for each route in a node when the number of routes is M (= 3) and there is no colorless function. In this case, in the figure, 1x9 WSS is route switching SW (branching) function unit 50, 9x1 WSS is route switching SW (merging) function unit 60, AWG (1) is wavelength allocation SW (branching) function unit 70, AWG (2) is managed as a wavelength allocation SW (merging) function unit 80. In the management model, as an optical switch system, the input port is designated by the input route (A), the input route for XC (C), and the transmission port (F), and the output port is designated by the output route (D), Designate with XC output route (B) and receive port (E).

[Example 3: Number of routes with a colorless function]
FIG. 6C shows a case where there is an optical switch system for each route in a node having two routes and a colorless function. In this case, in the figure, the 1x2 optical coupler immediately after the optical amplifier is the path switching SW (branch) function unit 50, 2x1 WSS is the path switching SW (merging) function unit 60, and 1x9 WSS is the wavelength assignment SW (branching) function unit. 70 and 9x1 WSS are managed as a wavelength allocation SW (merging) function unit 80 (A). In the management model, as an optical switch system, the input port is designated by the input route (A), the input route for XC (C), and the transmission port (F), and the output port is designated by the output route (D), Designate with XC output route (B) and receive port (E).

[Example 4: When the number of routes is M, with colorless / directionless function]
FIG. 6D shows an example in which the optical switch system 1 and the optical switch system 2 are configured as shown in the figure in a node having the number of routes M (= 3), colorless and directionless functions. Here, the directionless function is a function that allows a receiver to receive an optical path signal input from an arbitrary input path, and allows a transmitter to transmit an optical path signal to an arbitrary output path.

  The difference from the application examples 1 to 3 is that the application examples 1 to 3 have all four functional units, whereas the optical switch system 1 has a route switching SW (branch) function unit 50, a route, Only the switching SW (merging) function unit 60 is included, and the optical switch system 2 is different in that it has only a wavelength allocation SW (branching) function unit 70 and a wavelength allocation SW (merging) function unit 80.

  As shown in FIG. 6D, the optical switch system 1 manages 1 × 9 WSS as the route switching SW (branch) function unit 50 and 9 × 1 WSS as the route switching SW (merging) function unit 60. In the management model, the input port is designated by the input route (A), the input route for XC (C), and the input route for insertion (H), and the output port is the output route (D) and the output for XC. The route (B) and the branch output route (G) are designated.

  In optical switch system 2, 1x9 WSS (1) and 9x1 WSS (1) are wavelength allocation SW (joining) function units 70, 9x1 WSS (2) and 1x9 WSS (2) are wavelength allocation SW (branching) function units It manages as 80. In the management model, the input port is designated by the branch input route (I) and the transmission port (F), and the output port is designated by the reception port (E) and the insertion output route (J).

[Example 5: When the path switching function and the wavelength assignment function are implemented on the same device]
FIG. 6E shows an example of another configuration of the node when the number of routes is M (= 3) and there is a colorless function. The difference from Application Example 1 is that the path switching and wavelength allocation are realized using the same WSS by using the WSS having a large number of ports. In such a node configuration, 1xN WSS is managed as a path switching SW (branch) function unit 50, and a part of the output port is managed as a wavelength allocation SW (branching) function unit 70, and Nx1 WSS is managed as a path switching SW. The (merging) function unit 60 is managed, and a part of the input port is managed as the wavelength allocation SW (merging) function unit 80.

As described above, by applying the management model to the optical switch system, it becomes possible to perform control control uniformly for various types of optical switch systems. For this reason, even if the configuration, function, and control of the optical switch system are changed, the control management of the same optical switch system can be realized, and the cost and time of designing and manufacturing the optical switch system can be reduced. Play.
(Example 2)
[Internal configuration of optical switch system]
Next, the configuration of the optical switch system when the management model described in the first embodiment is applied will be described. 7A and 7B show the configuration of the optical switch system when the management model is used.

  In the example of FIG. 7A, a plurality of optical switch systems 401 and 402 are provided, and these are connected to the node management control unit 500. In the example of FIG. 7B, one optical switch system 400 is provided, which is connected to the node management control unit 500. The node management control unit 500 performs control management of the optical switch system.

  Note that the management model is not a model closed to the optical switch system, but a model applicable to the entire optical node. Therefore, when controlling a plurality of optical switch systems from the node management control unit 500, it is possible to specify the input / output port numbers for the entire node, not the input / output port numbers closed to each optical switch system. For example, in the case of application example 1, by assigning numbers 1, 2, 3,... To the input route (A) (or output route (D)) of each optical switch system, the optical switch As a single system, the number of the input route (A) (output route (D)) is different, and the other internal processing may be the same. The node management control unit 500 has an input route (output) of each optical switch system. It is possible to identify which optical switch system should be controlled by the number of the (route). That is, by applying the management model, a plurality of optical switch systems can be managed in a unified manner.

  Next, the configuration of each optical switch system shown in FIGS. 7A and 7B will be described. Since the functional configuration in each optical switch system is the same, description will be given here with reference to FIG. 7B showing the detailed configuration. The optical switch system 400 includes an IF function unit 410, a control function unit 420, a management model control unit 430, a physical configuration dependent absorption function unit 440, a device dependent absorption function unit 450, and a device 460. In addition, the IF function unit 410, the control function unit 420, the management model control unit 430, the physical configuration dependent absorption function unit 440, and the device dependent absorption function unit 450 include the optical switch control unit that is the control unit illustrated in FIGS. 3A and 3B. It is composed. The optical switch control unit can also be referred to as an optical switch system management control device.

  The IF function unit 410 is a function unit that communicates with the IF function unit 510 of the node management control unit 500.

  The control function unit 420 is a function unit that performs state management and control of the optical switch system 400. Specifically, in response to a request from the node management control unit 500, control of the optical switch system 400 such as optical path setting / deletion is performed, and the state (failure monitoring information, performance monitoring information) of the optical switch system 400 is changed. Or notify. In this embodiment, the control function unit 420 performs logical control and management using only the node management model without depending on the physical configuration or device in the optical switch system 400.

  The management model function unit 430 performs control management for each function unit on the management model in the optical switch system 400. The management model function unit 430 performs control and management that does not depend on the physical configuration or device in the optical switch system 400 but only on logical parameters such as input / output ports and presence / absence of functions.

  The physical configuration dependent absorption function unit 440 holds information on a physical configuration that realizes each functional unit. For example, as a physical configuration for realizing the route switching (branch) SW function unit 50, what kind of function units on the management model are used for various physical configurations such as a method using a WSS and a method using an optical coupler. Holds information on whether the physical configuration is implemented. Then, information on the management model from the management model function unit 430 is converted into information on the physical configuration and transmitted to the device-dependent absorption function unit 450, and information on the physical configuration from the device-dependent absorption function unit 450 is also transmitted. It has a function of converting information into information on the management model and transmitting it to the management model function unit 430.

  The device-dependent absorption function unit 450 is a function unit for absorbing differences between devices. That is, devices that realize each physical configuration have different device control commands or the like if the manufacturer or the like is different. However, the device-dependent absorption function unit 450 absorbs the difference depending on the device and the physical configuration-dependent absorption function unit 440. In higher-order function blocks, device-dependent information such as manufacturers is hidden. Specifically, information on the physical configuration from the physical configuration dependent absorption function unit 440 is converted into information unique to various devices to control various devices 460, and information from the device 460 is converted into physical configuration information. The information is converted into the information and transmitted to the physical configuration dependent absorption function unit 450.

  With reference to FIG. 7B, the configuration of the optical switch system 400 when the management model is used will be described in more detail.

  The management model function unit 410 has a control management block for each function unit (10, 40, 50, 60, 70, 80), and the control function unit 420 has a function block of each function unit of the management model function unit 430. Thus, control management of the optical switch system 400 is realized. Each functional block of the management model function unit 430 performs control management for the physical configuration dependent absorption unit 440.

  With such a configuration, even if the configuration, function, and device of the optical switch system 400 are different, the control function unit 420 and the management model function unit 430 are the same, and the design / manufacturing cost can be reduced.

  As described above, the management model is applied to the optical switch system, and the optical switch system is configured to include the control function unit 420, the management model function unit 430, and the physical configuration dependent absorption function unit 440, thereby controlling the optical switch system. The control function unit 420 and the management model function unit 430 that perform management can be made the same for various optical switch systems. For this reason, even if the configuration, function, and control of the optical switch system are changed, the control management of the same optical switch system can be realized, and the cost and time of designing and manufacturing the optical switch system can be reduced. Play.

[Optical switch system operation example]
Hereinafter, an example of an optical path setting procedure as an example of a setting control procedure in the optical switch system 400 when the management model according to the present invention is applied will be described with reference to FIG. FIG. 8 is a sequence diagram describing in what procedure each control unit performs control when an optical path setting request is received from the node management control unit 500. Details of each step are as follows.

  Step 1) The IF function unit 410 receives the optical path setting command transmitted from the node management control unit 500, and makes an optical path setting request to the control function unit 420.

Step 2) The control function unit 420 determines which functional block of the management model function unit 430 needs to be controlled from the optical path setting command. For example,
(A) If “input route → output route” is set, control to the route switching SW (branch) function 50 and the route switching SW (merging) function 60;
(A) If “input route → receiving port” is set, control to the route switching SW (branch) function 50 and the wavelength assignment SW (branch) function 70;
(C) If “transmission port → output route” is set, control to the route switching SW (merging) function 60 and the wavelength allocation SW (merging) function 80;
(D) If “input route → XC output route” is set, only the route switching SW (branch) function 50 is controlled;
(E) If “XC input route → output route” is set, only the route switching SW (merging) function 60 is controlled;
As described above, the control function unit 420 specifies which logic dependence control unit (the functional block in the management model function unit 430) should be controlled from the designated input / output port.

  In all the application examples 1 to 5, it is possible to determine which function on the management model needs to be controlled from the designated input / output port information.

  In the example shown in FIG. 8, the case where the control to the functional block A and the functional block B is performed is shown.

  Step 3) Whether or not the requested optical path setting is possible based on the optical path setting information held in the control function unit 420 (whether it is a connectable combination or is not already used for another optical path, etc.) Is determined.

  Step 4) The optical path setting is requested from the control function unit 420 to the functional block of the management model function unit 430 that needs the control extracted in Step 2. In this example, it is shown that control is performed for each of the function block A and the function block B.

  Step 5) In each function block of the management model function unit 430, the path setting request from the control function unit 420 is converted into an input / output port number to be set in the function block.

  Step 6) In each functional block of the management model function unit 430, based on the optical path setting information held, whether or not setting is possible between the input / output ports requested for setting (whether it is a connectable combination or already another light) Whether it is not used in the pass).

  Here, when there is no colorless function as in application example 2, the connection between the input / output ports in the wavelength assignment SW (branch / merging) function units 70 and 80 is limited by the wavelength of the optical path. In the case of a request between input / output ports that cannot be connected, the request is processed as being inaccessible here.

  Step 7) The management model function unit 430 makes an optical path setting request to the physical configuration dependent absorption function unit 440. At this time, the request is made using the input / output port number of each functional unit converted in step 5.

  Step 8) The physical configuration dependent absorption function unit 440 extracts the optical device to be set and the input / output port number of the optical device in consideration of the physical configuration of the corresponding functional unit from the received optical path setting request.

  If the extracted device is a passive device, the process proceeds to step 11 without performing the processes of steps 9 and 10 (ACK transmission from the physical configuration dependent absorption function unit 440). For example, the extracted device is an AWG used as the wavelength assignment SW (branching / merging) function 70 or 80 of application example 2 or an optical coupler used as the path switching SW (branching) function 50 of application example 3. This is the case.

  If there are two or more extracted devices in step 8, the processes in steps 9 and 10 are performed for each device. This corresponds to, for example, the case where 1x9 WSS and 9x1 WSS are extracted as the wavelength assignment SW (branching / merging) functions 70 and 80 of Application Example 4, respectively.

  Step 9) An optical path setting request is sent from the physical configuration dependent absorption function unit 440 to the device dependent absorption function unit 450.

  Step 10) The device-dependent absorption function unit 450 generates a request signal specific to the connected optical device, and issues a SW setting request (device control) to the corresponding optical device. Here, in an optical device such as 1x9 WSS, device control is performed by converting the communication to control the optical device unique to the manufacturer.

  Step 11) After the SW setting is completed, ACK is notified.

  Step 12) The control function unit 420 that has received the ACK for each functional block updates the optical path setting information.

  Step 13) The control function unit 420 sends an ACK notification to the node management control unit 500.

  As described above, the management model is applied to the optical switch system 400, and the optical switch system 400 is configured to include the control function unit 420, the management model function unit 430, and the physical configuration dependent absorption function unit 440. Even when the configurations and functions of the optical switch systems are different as in (5) to (5), the control function unit 420 is the same, and the management model function unit 430 is the same except for the input / output port information. As described above, even if the configuration, function, and control of the optical switch system are changed, control management of the same optical switch system can be realized, and the cost and time of designing and manufacturing the optical switch system can be reduced. There is an effect.

  The optical switch control unit (control unit) including the control function unit 420, the management model function unit 430, and the physical configuration dependent absorption function unit 440 performs the above-described control process on a computer including a CPU and a storage unit such as a memory. This can be realized by executing a program to be executed. The optical switch control unit (control unit) can also be realized using a hardware logic circuit.

Example 3
In this embodiment, a case where the optical switch system includes a monitor function will be described. FIG. 9 shows a configuration in which an optical switch system is used for each route in an optical node having the number of routes M (= 3) and a colorless function. The difference from Application Example 1 is that the optical switch system of Application Example 1 includes an OCM (optical channel monitor) for measuring an optical path signal. In this case, as an optical node management model, a route switching SW (branch) function unit 50, a route switching SW (merging) function unit 60, a wavelength allocation SW (branching) function unit 70, and a wavelength allocation SW (merging) function unit In addition to performing management control as 80, the OCM is managed as the monitor function unit 40. Details will be described below.

  As a configuration of the optical switch control unit of the optical switch system in the third embodiment, the management model function unit 430 includes a monitor function block (see FIG. 7B). The control function unit 420 controls the monitor function block of the management model function unit 430. The monitor function unit block in the management model function unit 430 manages monitor information on the management model.

  The monitor information on the management model refers to information in which monitor points are defined by the input / output ports of the function units (50, 60, 70, 80) of the management model. As an example, FIG. 10 shows monitor information on the management model in the optical switch system of FIG.

  As described with reference to FIG. 4, as a functional unit of the management model, a route switching SW (branch) function unit 50, a route switching SW (merging) function unit 60, a wavelength assignment SW (branch) function unit 70, a wavelength An assigned SW (merging) function unit 80 exists, and its input / output ports include an input route, an output route, an input route for XC, an output route for XC, an input route for branching, an output route for branching, There are an input path for insertion, an output path for insertion, a reception port, and a transmission port. As shown in FIG. 10, the monitor information on the management model is the monitor information (input route monitor, output route monitor, XC input route monitor, XC output route monitor, branching information) at these input / output ports. Input route monitor, branch output route monitor, insertion input route monitor, insertion output route monitor, reception port monitor, transmission port monitor). The monitor information is transmitted to the node management control unit 500, and can be used for controlling the optical node in the node management control unit 500.

  In the monitor function block of the management model function unit 430, only the monitor information on the management model is managed, and the conversion between the management model and the measurement method such as physical configuration and PD, OCM is performed by the physical configuration dependent absorption dependency unit 440. Differences between device manufacturers such as PD and OCM are absorbed by the device-dependent absorption dependency unit 450.

As described above, in the monitor function block of the management model function unit 430, by managing the monitor information on the management model, the control function unit 420 and the management model function unit 430 are provided for the optical switch system having various configurations. Can be the same. For this reason, even if the configuration, function, and control of the optical switch system are changed, the control management of the same optical switch system can be realized, and the cost and time of designing and manufacturing the optical switch system can be reduced. Play.
Example 4
In the present embodiment, a case where other devices are controlled based on information monitored by the monitoring function in the optical switch system 400 will be described. Here, as an example of controlling other devices based on the information monitored by the monitoring function, the path switching SW (confluence) so that the optical power level of each wavelength of the wavelength multiplexed signal output from the node is uniform Based on the optical power level information of each optical path signal at the output port (output route) position of the functional unit 60, the optical power level is adjusted by the path switching SW (merging) functional unit 60 as an example. I will explain.

  First, the monitor function block of the management model function unit 430 acquires the optical power level of each optical path signal at the output route position. That is, when an OCM is used as a device, the power level information of each optical path signal detected by the OCM is notified to the physical configuration dependent absorption unit 440 via the device dependent absorption function unit 450. The physical configuration dependent absorption unit 440 notifies the management model function unit 430 in addition to the fact that the notified information is information on the output route position (output route d in the example shown in FIG. 10). To do.

  Next, the control function unit 420 acquires the power level of the optical path signal at the output route position from the management model function unit 430, and compares it with the target value of the power level so as to approach the target value. An instruction to adjust the attenuation amount with respect to the optical path signal is given to the path switching SW (merging) function unit 60 of the function unit 430. Then, the path switching SW (merging) function unit 60 attenuates the optical path signal based on the designated attenuation amount.

  In these series of processes, the control for making the optical power level constant is performed by the control function unit 420, and this control is performed on the management model and does not depend on the physical configuration. The control is not limited to this example, and the control of the optical amplifier according to the number of wavelengths can be similarly realized.

  As described above, the control function unit 420 controls another function block of the management model function unit 430 on the basis of the monitor information in the monitor function block of the management model function unit 430. The control function unit 420 and the management model function unit 430 can be made the same for the switch system. For this reason, even if the configuration, function, and control of the optical switch system are changed, the control management of the same optical switch system can be realized, and the cost and time of designing and manufacturing the optical switch system can be reduced. Play.

(Example 5)
In the present embodiment, a method for performing management control of a control sequence in the optical switch system 400 on the management model in the control of the optical switch system 400 will be described.
In the configuration of the optical switch system 400 to which the management model described in FIG. 7B is applied, the control function unit 420 performs management control of the control sequence in the optical switch system 400. Then, in the optical path setting procedure of FIG. 8, the control sequence is determined in the process of step 2 of the control function unit 420.

  Specifically, in step 2, it is determined which management model function unit 430 is to be controlled by the functional block, and in what order the functional block is controlled in what order. Then, the process of step 4 is performed on each functional block in the determined order.

  In the processing of step 2 of the control function unit 420 of the optical path setting procedure in FIG. 8, the analysis of which management model function unit 430 performs control from the optical path setting request command is the same as in the second embodiment. is there. However, there are various methods for controlling which functional block in what order. In this embodiment, a method is used in which the order is tabulated and stored in the storage unit of the control function unit 420.

  That is, when optical path setting is performed in the optical switch system 400, in step 2, the above table is referred to and the order in which the control in step 4 is performed is determined. FIGS. 11A and 11B are diagrams showing an example of a table when the optical switch system shown in FIG. 12 is assumed.

  Both FIG. 11A and FIG. 11B show the functional blocks to be controlled for each optical path setting request command, and the order when there are a plurality of functional blocks to be controlled. . For example, in FIG. 11 (a), the control targets in the path setting command from the input route a to the receiving port e are the route switching SW (branch) function unit 50 and the wavelength assignment SW (branch) function unit 70. The route switching SW (branch) function unit 50 is set first, and then the wavelength assignment SW (branch) function unit 70 is set. Further, in the example of FIG. 11B, the objects to be controlled by the path setting command from the input route a to the reception port e are the wavelength assignment SW (branch) function unit 70 and the route switching SW (branch) function unit 50. It shows that the wavelength assignment SW (branch) function unit 70 is set first, and then the route switching SW (branch) function unit 50 is set.

  The sequence shown in FIG. 11A corresponds to a case where the optical switch system and the transponder are controlled in order from the upstream side of the optical path in the entire NW. Further, the sequence shown in FIG. 11B corresponds to the case where the optical switch system and the transponder are controlled in order from the downstream side of the optical path in the entire NW.

  In this way, by setting the optical path setting sequence as a table and storing it in the control function unit 420, the control sequence of the optical switch system can be performed on the management model without depending on the function, physical configuration, and device of the optical switch system. Can be designed and implemented. Even if the sequence is changed, it is only necessary to change the table, and the sequence can be easily changed. In other words, it is possible to minimize the change of the control function depending on the NW operation mode, and it is possible to realize the design and manufacture of the optical switch system at low cost and in a short period of time. Furthermore, when the NW operation mode is changed, it was necessary to redesign and remanufacture the optical switch system in the past, but by changing the table from the outside, the function of the optical switch system can be changed according to the NW operation mode. -The control can be changed, and the NW operation mode can be changed without redesign and remanufacturing.

(Example 6)
In the present embodiment, a method for performing management control of the setting state transition condition of the optical switch system 400 on the management model in the control of the optical switch system 400 will be described.
FIG. 7B illustrates the configuration of the optical switch system 400 to which the management model is applied. In this configuration, the control function unit 420 performs setting state management of the optical switch system 400. Further, although the optical path setting procedure is described in FIG. 8, whether or not the setting state of the optical switch system 400 can be changed is performed in step 3 of the control function unit 420. As described above, in the optical switch system 400 to which the management model is applied, the control function unit 420 determines whether or not setting state management and state transition are possible. Then, the state transition conditions are tabulated and stored in the storage unit of the control function unit 420. In step 3 of the control function unit 420 when setting the optical path in the optical switch system 400, the state transition is referred to by referring to this table. It is determined whether or not the acceptable condition is satisfied, and if the condition is satisfied, the processes in and after step 4 are performed.

  A specific example of the table will be described below. In the optical switch system of Application Example 1 (see the optical switch system shown in FIG. 12), the optical path setting request has the following patterns for each wavelength.

(1) Input route a → XC output route b (indicated as a → b)
(2) XC input route c → output route d (denoted as c → d)
(3) Input route a → receiving port e (indicated as a → e)
(4) Transmission port f → output route d (describes f → d)
Note that a, b, c, d, e, and f are parameters representing port numbers. However, in the optical switch system of Application Example 1, there are only one value of a and d.

  Then, for each pattern of the optical path setting request, conditions that can be set are created as a table, the table is held in the control function unit 420, and is referred to in step 3. An example of the table is shown in FIGS. 13 (a) and 13 (b). 13A is a state transition condition when setting a one-way path is impossible assuming only a bidirectional path operation. FIG. 13B is a one-way path operation. The state transition conditions when a one-way path setting is permitted are also described. Of course, what is shown here is only an example, and various other state transition conditions can be described depending on the operation mode.

  In this way, transition conditions of optical path setting states are tabulated and stored in the control function unit 420, so that transition conditions can be managed on the management model, without depending on the function, physical configuration, or device of the optical switch system. Transition conditions can be designed. Furthermore, even if the transition condition is changed, it is only necessary to change the table, and the transition condition can be easily changed. In other words, it is possible to minimize the change of the control function depending on the NW operation mode, and it is possible to realize the design and manufacture of the optical switch system at low cost and in a short period of time. Furthermore, when the NW operation mode is changed, it was necessary to redesign and remanufacture the optical switch system in the past, but by changing the table from the outside, the function of the optical switch system can be changed according to the NW operation mode. -The control can be changed, and the NW operation mode can be changed without redesign and remanufacturing.

  The present invention can be applied to management control of an optical switch system constituting an optical node in a photonic NW.

  The present invention is not limited to the above-described embodiments, and various modifications and applications are possible within the scope of the claims.

1 Optical amplifier 2 Transmitter 3 Receiver 4 Optical coupler 5 1x9 WSS
6 9x1 WSS
10 amplifier function unit 20 transmission function unit 30 reception function unit 40 monitor function unit 50 route switching SW (branch) function unit 60 route switching SW (merging) function unit 70 wavelength allocation SW (branch) function unit 80 wavelength allocation SW ( Function unit 100, 200, 300 Optical node 101, 201, 202, 203, 310, 400, 401, 402 Optical switch system 110, 210 Node management controller 111, 211, 212, 213 Optical switch controller 410 IF function Unit 420 control function unit 430 management model control unit 440 physical configuration dependent absorption function unit 450 device dependent absorption function unit 460 device 500 node management control unit 510 IF function unit

Claims (4)

An optical switch system used for an optical node constituting a photonic network,
The function of the optical switch system
Branch-side path switching SW function part that switches the optical path or switches the path
Merge side path switching SW function part that performs optical path insertion or path switching,
The optical path branched by the branch side path switching SW function unit, the branch side wavelength assignment SW function unit for connecting to the port to which the receiver is connected, and
Management control of the optical switch system is performed using a management model that classifies the optical path input from the port connected to the transmitter into the merging side wavelength switching SW function unit connected to the merging side path switching SW function unit. Having control means to perform,
The control means includes
A control function unit for performing management control in the optical switch system on the management model;
Logical management control is performed for each functional unit on the management model, and the management model functional unit to be controlled by the control functional unit;
A physical configuration-dependent absorption function unit that holds information on a physical configuration corresponding to each functional unit on the management model in the optical switch system and performs conversion between the physical configuration and each functional unit on the management model; Prepared,
Wherein the control unit holds the procedure information representing a control procedure for each functional unit of the optical switching system, the procedure in accordance with the procedure information, an optical switch control section for controlling for each functional unit,
The management model function unit receives a path setting request from the control function unit, extracts an input / output port number to be set, determines whether a path can be set between the input / output ports, and can be set An optical switch system, wherein the physical configuration dependent absorption function unit extracts an optical device to be set and an input / output port number of the optical device. Said control means in the optical switch system maintains the set state transition information representing a setting state transition condition of the optical switch system, in accordance with the setting state transition information, in claim 1, characterized in that to set the state transition The optical switch system described. An optical switch system management control device that performs management control of an optical switch system used in an optical node constituting a photonic network,
The function of the optical switch system
Branch-side path switching SW function part that switches the optical path or switches the path
Merge side path switching SW function part that performs optical path insertion or path switching,
The optical path branched by the branch side path switching SW function unit, the branch side wavelength assignment SW function unit for connecting to the port to which the receiver is connected, and
Using a management model that classifies the optical path input from the port connected to the transmitter into the merging-side wavelength allocation SW function unit connected to the merging-side path switching SW function unit,
A control function unit for performing management control in the optical switch system on the management model;
Logical management control is performed for each functional unit on the management model, and the management model functional unit to be controlled by the control functional unit;
A physical configuration-dependent absorption function unit that holds information on a physical configuration corresponding to each functional unit on the management model in the optical switch system and performs conversion between the physical configuration and each functional unit on the management model; Prepared,
Optical switch system management that holds procedure information representing a control procedure for each functional unit of the optical switch system, and performs management control of the optical switch system by controlling each functional unit in a procedure according to the procedure information Control device,
The management model function unit receives a path setting request from the control function unit, extracts an input / output port number to be set, determines whether a path can be set between the input / output ports, and can be set An optical switch system management, wherein the physical configuration dependent absorption function unit extracts an optical device to be set and an input / output port number of the optical device. Control device. A management control method in an optical switch system used for an optical node constituting a photonic network,
The function of the optical switch system
Branch-side path switching SW function part that switches the optical path or switches the path
Merge side path switching SW function part that performs optical path insertion or path switching,
The optical path branched by the branch side path switching SW function unit, the branch side wavelength assignment SW function unit for connecting to the port to which the receiver is connected, and
Using a management model that classifies the optical path input from the port connected to the transmitter into the merging-side wavelength allocation SW function unit connected to the merging-side path switching SW function unit,
A control function unit for performing management control in the optical switch system on the management model, receiving a setting control request;
Performing logical management control for each function unit on the management model, and receiving a setting control request for each function unit from the control function unit by the management model function unit to be controlled by the control function unit When,
A physical configuration-dependent absorption function unit that holds information on a physical configuration corresponding to each functional unit on the management model in the optical switch system and performs conversion between a physical configuration and each functional unit on the management model, Receiving a setting control request from the management model function unit, and extracting a physical configuration of the function unit to be set based on the setting control request,
A management control method that holds procedure information representing a control procedure for each functional unit of the optical switch system, and performs management control of the optical switch system by performing control on each functional unit in accordance with the procedure information. Yes,
The management model function unit receives a path setting request from the control function unit, extracts an input / output port number to be set, determines whether a path can be set between the input / output ports, and can be set A management control method, wherein the physical configuration dependent absorption function unit extracts an optical device to be set and an input / output port number of the optical device.

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