Control device for transmission apparatus, path setting method, program and transmission system

Abstract

To avoid association setting mismatch between a logical path between both end nodes and a physical port for connecting with an apparatus, which utilizes a communication between both the nodes, and simplify the setting.SOLUTION: In an optical transmission system, a control device 400 comprises: an association information holding section 401 for holding first association information of a physical port of a first OTN apparatus connected to one node and one logical path and second association information of a physical port of a second OTN apparatus, which is connected to the other node and a communication destination of the first OTN apparatus, and one logical path; a path setting request section 402 which causes the one node to execute a path setting based on the first association information, transmits the second association information from one node through a control channel to the other node and causes the other node to execute a path setting based on the second association information; and a setting result reception section 403 for receiving a result of the path setting from the one node via the control channel from the other node.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a control device, a path setting method, a program, and a transmission system for a transmission device that uses an optical transport network (OTN) technology. [Background technology]

[0002] OTN is a communications standard defined by the International Standardization Organization (ITU-T). Based on this standard, optical transmission technology is being developed to transmit large volumes of information over long distances (hundreds to thousands of kilometers) and is used in backbone networks between telephone exchanges and other networks. To accommodate the increasing transmission capacity of communications networks, OTN equipment has been used to achieve optical transmission systems that transmit optical signals directly between nodes without electrical-to-optical conversion of the main signal within the node. Examples of OTN equipment that have been put into practical use include wavelength division multiplexing (WDM) equipment and reconfigurable optical add-drop multiplexer (ROADM) equipment, which multiplex light with different wavelengths to transmit multiple signals over a single optical fiber.

[0003] To achieve rapid path opening in a ROADM device, an optical transmission system is known in which WSS (Wavelength Selective Switch) device operations are performed in parallel at multiple nodes. This system transmits path setting information from a node that receives a path start setting command from an operation support system (OSS) to an upstream node using an optical supervisory channel (OSC) (see Patent Document 1). Each node in the optical transmission system is connected to a DCN (Data Communication Network) as well as optical fiber transmission lines, and is centrally managed by an operation support system (OSS) connected to these. In addition, in the optical fiber transmission line, OSC light with a wavelength different from that of the main signal is superimposed on the main signal, and supervisory control data is transmitted and received between nodes using the OSC light. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-070198 Summary of the Invention [Problem to be solved by the invention]

[0005] The above optical transmission system is based on the premise that, in order to open communication between nodes in a short time, a path setup start command is sent from the operation support system (OSS) to either of the nodes at both ends of the path. In addition, in the above optical transmission system, setting information related to the physical layer of the high-speed optical signal required to realize communication between nodes, such as optical switch settings to open the path, is exchanged via OSC light.

[0006] However, the above Patent Document 1 does not explain the relationship between the logical path between both end nodes in the optical transmission system and the physical port for connecting to the device (client device) that uses the communication between the both nodes. Therefore, for example, the above optical transmission system has a problem in which the link setting between the logical path and the physical port may not match.

[0007] The present invention has been made in consideration of the above-mentioned problems of the conventional technology, and aims to provide a control device, a path setting method, a program, and a transmission system for a transmission device that can avoid mismatches in the linking settings between the logical path between both end nodes and the physical ports for connecting to devices that use communication between the two nodes, and that can simplify this setting. [Means for solving the problem]

[0008] A control device of the present invention is connected to one node in a transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, and a plurality of nodes connected to the transmission path and each having a plurality of physical ports, and the control device performs path setting in each of the plurality of nodes to link and connect one of the plurality of logical paths to one of the plurality of physical ports, a linking information storage unit that stores first linking information between a physical port of a first device connected to the first node and one logical path, and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request unit that causes the first node to execute the path setting based on the first binding information, and that transmits the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; a setting result receiving unit that receives a result of the path setting from the other node via the control channel; The present invention is characterized by having the following.

[0009] The method of the present invention is a path setting method in a transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, and a plurality of nodes connected to the transmission path and each having a plurality of physical ports, the path setting method being performed by a control device that is connected to one node and that performs path setting in each of the plurality of nodes to link and connect one of the plurality of logical paths to one of the plurality of physical ports, and includes: a linking information holding step of holding first linking information between a physical port of a first device connected to the first node and one logical path and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request step of causing the first node to execute the path setting based on the first binding information, and transmitting the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; and a setting result receiving step of receiving the result of the path setting from the other node via the control channel from the one node.

[0010] The program of the present invention is a program for a transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, and a plurality of nodes connected to the transmission path and each having a plurality of physical ports, the program being configured to cause a computer mounted on a control device connected to one node and performing path setting for linking and connecting one of the plurality of logical paths to one of the plurality of physical ports in each of the plurality of nodes, to: a linking information storage unit that stores first linking information between a physical port of a first device connected to the first node and one logical path, and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request unit that causes the first node to execute the path setting based on the first binding information, and that transmits the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; The node is characterized in that it functions as a setting result receiving unit that receives the result of the path setting from the other node via the control channel.

[0011] A transmission system of the present invention includes a transmission path formed by a plurality of logical paths for data transfer and a control channel, a plurality of nodes connected to the transmission path and each having a plurality of physical ports, and a control device connected to one node and performing path setting for linking and connecting one of the plurality of logical paths to one of the plurality of physical ports in each of the plurality of nodes, The control device a linking information storage unit that stores first linking information between a physical port of a first device connected to the first node and one logical path, and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request unit that causes the first node to execute the path setting based on the first binding information, and that transmits the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; a setting result receiving unit that receives a result of the path setting from the other node via the control channel; Each of the plurality of nodes is characterized by having a completion notification sending unit that executes the path setting based on the linking information and returns the execution result of the path setting to a requesting party. [Effects of the Invention]

[0012] The control device, path setting method, program, and transmission system for a transmission device of the present invention can avoid inconsistencies in the linking settings with physical ports for connecting to equipment that uses communication, and simplify this setting, making it possible to set paths even during initial node configuration before the control route between the operation support system OSS and the node is opened. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a block diagram showing a basic configuration of an optical transmission system according to an embodiment of the present invention; [Figure 2] 1 is a schematic block diagram showing a partial configuration of a transmission system in which a control device according to an embodiment of the present invention is connected to a node A. FIG. [Figure 3] 1 is a schematic block diagram showing a partial configuration of a transmission system in which a control device according to an embodiment of the present invention is connected to a node A. FIG. [Figure 4] 1 is a schematic block diagram showing a partial configuration of a transmission system in which a control device according to an embodiment of the present invention is connected to a node A. FIG. [Figure 5] 10 is a flowchart showing a path setting by the transmission device of the present embodiment. [Figure 6] 10 is a flowchart showing an outline of path setting by the transmission device of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an optical transmission system according to an embodiment of the present invention will be described with reference to the drawings. In the following embodiments, components having substantially the same functions and configurations are designated by the same reference numerals, and redundant description will be omitted.

[0015] (First Example) (Configuration explanation) FIG. 1 is a block diagram showing a basic configuration of a first network 10 (optical transmission system) which is a ring-connected OTN optical transmission network configured with transmission devices according to an embodiment of the present invention.

[0016] Network 10 is composed of multiple transmission devices 101, 102, ..., and X station 1xx, and an optical fiber transmission line 11 with a ring-like redundant configuration as a core network connecting adjacent nodes. Station A 101 of the ring of network 10 and its neighboring stations B 102, X 1xx, ... are connected to a supervisory control network WCN via a wide area network (WAN) separate from the optical fiber transmission line 11. Adjacent nodes in the ring communicate with each other using OSC light within the optical fiber. Therefore, transmission line 11 is formed by multiple wavelength paths (also called λ paths or logical paths) for data transfer of the main signal propagating therethrough and OSC light (control channel) for control. In this system, in addition to the 2.4-100 Gb / s main signal (here, wavelength path refers to the path of an optical signal that occupies one wavelength), a supervisory signal of OSC light of approximately 1.5-150 Mb / s is used as a control channel (here, control channel refers to the path of an optical signal that occupies one wavelength).

[0017] This OSC light is used for operational settings and status monitoring, and is used to monitor the status and control the settings of the optical amplifiers in the optical fiber transmission line, as well as to detect transmission line faults. For this reason, in WDM systems, only the main signal is usually amplified and transmitted by the optical amplifier in the transmission line, and the OSC light is transmitted without passing through the optical amplifier. Furthermore, because the OSC light is used as a control signal, its transmission level is set low so as not to interfere with the main signal.

[0018] Station A 101 can communicate via a WAN with a supervisory control terminal WCPC, which is an operational support system OSS connected to a supervisory control network WCN, which is a DCN, or it can be controlled by a control device (not shown) connected directly without going through the supervisory control network WCN.

[0019] For example, several thousand stations A 101, B 102, . . . X 1xx are connected, and each of the nodes A 101, B 102, . . . X 1xx can accommodate several tens of thousands of client devices CL.

[0020] In this embodiment, the nodes A 101, B 102, ..., and X 1xx can each autonomously set up a path. The path setting is performed based on a program installed in each node.

[0021] 2 to 4 are schematic block diagrams showing the configuration of a portion of a transmission system in which a control device 400 according to this embodiment is connected to a node, station A 101. Station A 101 of the transmission device has a monitoring and control unit 201, a ROADM unit 202, and a client I / F unit 203. Fig. 2 shows the ROADM unit 202 in detail, and Fig. 3 shows the monitoring and control unit 201 in detail.

[0022] (ROADM Department 202) As shown in FIG. 2, the ROADM unit 202 includes, for example, an optical cross-connect switch OXC and first and second multiplexers / demultiplexers AWG1 and AWG2 (e.g., arrayed-waveguide gratings) facing the ports for each optical signal at both ends of the optical cross-connect switch OXC. The optical cross-connect switch OXC of the ROADM unit 202 is an optical switch that branches, passes, and adds optical signals, allowing wavelength paths to be reconfigured. The first multiplexer / demultiplexer AWG1 separates superimposed light input from a single optical fiber into light of different wavelengths λ1...n (wavelength paths) and OSC light. Conversely, the second multiplexer / demultiplexer AWG2 multiplexes the light of different wavelengths λ1...n (wavelength paths) and OSC light and outputs the multiplexed light to a single optical fiber. The optical cross-connect switch OXC separates the input WDM signal into optical signals λ1...n (wavelength paths) by wavelength using a first multiplexer / demultiplexer AWG1, and then inputs each of the optical signals to one of the optical signal ports of the optical cross-connect switch OXC according to the path set by the supervisory control unit 201. The optical cross-connect switch OXC either drops (drops) a certain wavelength λ out of the optical signals λ1...n (to the client device CL via the client I / F unit 203), passes (thrus) it to the next second multiplexer / demultiplexer AWG, or adds (adds) the signal input from the client device CL to one of the optical wavelengths and sends it to the next ROADM device (station B 102) via the second multiplexer / demultiplexer AWG2. The OSC light that has passed through the optical cross-connect switch OXC is used by the supervisory control unit 201.

[0023] As shown in Figure 2, the ROADM unit 202 has a monitoring control unit 201 and a client I / F unit 203 at both ends of the optical cross-connect switch OXC, where the ROADM unit 202 intersects with the first and second multiplexers / demultiplexers AWG1 and AWG2 that face each other.

[0024] (Client I / F section 203) The client I / F unit 203 accommodates a plurality of client devices CL (see FIG. 2), and performs frame routing processing between the client devices CL and the ROADM unit 202. The client I / F unit 203 inserts transponders (not shown) at the start and end points of each of a plurality of paths from the optical cross-connect switch OXC, and connects them to each of the client devices CL via physical ports.

[0025] When adding a signal, for example, a signal received from a client device CL such as an IP router is mapped to an OTN frame in the client I / F unit 203 of the ROADM unit 202. The signal is converted to the appropriate optical wavelength in the client I / F unit 203 and sent to the optical cross-connect switch OXC.

[0026] The optical cross-connect switch OXC sends the optical signal from the add port through the add (ADD) optical switch to the second multiplexer / demultiplexer AWG2, where it is multiplexed with a wavelength-multiplexed signal sent from the ROADM unit 202 of the adjacent X station 1xx and then transmitted to the next node B station 102.

[0027] When a signal from the first multiplexer / demultiplexer AWG1 is to be dropped, the signal follows the reverse route from the ROADM unit 202 to the client I / F unit 203 using a drop optical switch of the optical cross-connect switch OXC.

[0028] (Monitoring and control unit 201) Each of the transmission devices of station A 101, station B 102, ..., station X 1xx, which have the same configuration, for example, the transmission device of station A 101, has a monitoring control unit 201, which is a computer device that monitors and controls various functional modules (not shown) within the device.

[0029] 3, the monitoring and control unit 201 has a WAN termination unit 301 that executes WAN communications between the monitoring and control network WCN and a CPU 302. The WAN termination unit 301 may be directly connected to the control device 400.

[0030] The monitoring and control unit 201 has a CPU (Central Processing Unit) 302 and a storage device such as an HDD (Hard Disk Drive), SSD (Solid State Drive), or flash memory, which are connected to the WAN termination unit 301 via an internal bus. A memory unit 303 of the storage device temporarily stores data when setting up a path. The memory unit 303 stores programs, setting data, and the like. Specifically, the memory unit 303 holds a path information table 503 transmitted from and held by the control device 400. The monitoring and control unit 201 controls the overall operation of the transmission device using the CPU in accordance with the installed program.

[0031] The path information table 503 includes linking information indicating the linking between physical ports 1, 2, ..., m-1, m and wavelength paths λ1, λ2, ..., λn for connecting to client device CL of the transmission device of the node (for example, its own device) where the path setting should be performed. If the path information table 503 of station A 101 is empty, it is controlled to obtain the path information table 503 from the control device 400.

[0032] The CPU 302 has a path setting execution unit 500, a node status check function unit 501, and a path setting instruction unit 502 as functional units of a program loaded in its cache memory.

[0033] The path setting execution unit 500 performs path setting for its own device based on the path information table 503 received from the control device 400 together with the path setting request signal.

[0034] A node status check function unit 501 of station A 101 reads the status, such as the value of a path setting completion flag 504 (described later), of the transmission device with which it is to communicate (station B 102) via the OSC light in the optical fiber, and determines the status. When the path setting is completed in its own device, the node status check function unit 501 checks via the OSC light whether the optical cross connect switch OXC of station B 102 is in a state where a path can be set based on the path information table 503.

[0035] The node status check function unit 501 has a function of requesting a status check from the B station 102 and a receiving function of receiving the status information from the CPU 302 of the B station 102. The node status check function unit 501 judges the value of the path setting execution flag 504 and sends the judgment to the path setting instruction unit 502.

[0036] The path setting instruction unit 502 is a function unit that instructs the station B 102 to set up a path or performs skip processing via the OSC light in the optical fiber, depending on the determination of the node status check function unit 501 .

[0037] The path setting instruction unit 502 also functions as a completion notification sending means that, when path setting of its own device (for example, when its own device is station A 101 and has received a path setting request from the control device 400) is completed, sends a path setting completion notification to the control device 400 notifying that path setting has been completed, and returns the execution result of path setting to the requesting destination.In addition, the path setting instruction unit 502 also functions as a completion notification sending means that, when path setting of its own device (for example, when its own device is station B 102) is completed, sends a path setting completion notification to station A 101 notifying that path setting has been completed.

[0038] If the path setting is not completed at station B 102 , path setting instruction unit 502 transmits a path setting incompletion notification to station A 101 .

[0039] The path setting instruction unit 502 also functions as a completion notification receiving means for receiving a path setting completion notification from the path setting execution unit 500 of the B station 102 when the path setting of the B station 102 is completed, notifying that the path setting has been completed.

[0040] When the path setting instruction unit 502 receives the path setting completion notification, it records the path setting status information (linking information) indicating that the path setting from station B 102 has been completed in the path information table 503 (changing the "path setting implementation flag 504" from not implemented to implemented), and also functions as a path setting status recording means.

[0041] Although not shown, the GC stations 1xx, 102, etc. upstream and downstream of the A station 101 also have the same configuration as the A station 101 (a monitoring control unit 201, a ROADM unit 202 that performs optical transmission with adjacent nodes, and a client I / F unit 203).

[0042] (Control device 400) A control device 400 connected to the transmission device of station A 101 performs path setting processing to request station A 101 to set up a path that links and connects one of a plurality of wavelength paths (λ paths) to one of a plurality of physical ports in station A 101. Although not shown, the control device 400 is a computer device that includes a CPU (Central Processing Unit) and a storage unit such as a RAM (Random Access Memory) (not shown), and controls the overall operation, including the processing of the control device, by the CPU in accordance with various software programs stored in the storage unit. The CPU executes path setting processing in accordance with various application software programs installed in the storage unit, for example, in accordance with a path setting application software program.

[0043] The path setting application software program installed in the control device 400 is expanded in the storage unit, and the program causes the CPU to have the following functional units: (1) an information storage unit 401; (2) a path setting request unit 402; (3) Function as the setting result receiving unit 403.

[0044] Each functional unit of the control device 400 functions as follows.

[0045] (Information holding unit 401) The binding information storage unit 401 stores first binding information of a wavelength path (λ path) at the A station 101 that is bound to a physical port of a first client device connected to the transmission device of the A station 101, and second binding information of a wavelength path (λ path) at the A station 101 that is bound to a physical port of a second client device that is connected to the transmission device of the B station 102 and is the communication destination of the first client device. 4, the holding unit 401 holds first binding information of the wavelength paths λ1 and λ2 paths bound to physical ports 1 and 2 connected to client devices CL1 and CL2 (service using devices 1a and 2a) of the A station 101 (OTN device 1), and second binding information of the wavelength paths λ1 and λ2 paths in the A station 101 bound to physical ports 1 and 2 of second client devices CL1 and CL2 (service using devices 1b and 2b) connected to the B station 102 (OTN device 2) and which are communication destinations of the first client device. The control device 400 sends the first and second binding information to the path information table 503 of the A station 101 via the WAN termination unit 301.

[0046] (Path setting request unit 402) The path setting request unit 402 sends a path setting request command to station A 101, causing it to execute path setting based on the first linking information, and also transmits second linking information from station A 101 to station B 102 via OSC light, causing the transmission device of station B 102 to execute path setting based on the second linking information.

[0047] (Setting result receiving unit 403) The setting result receiver 403 receives the path setting result from the A station 101 via the wavelength paths λ1 and λ2 in the transmission device of the B station 102 via the OSC light.

[0048] (Operation of this embodiment) Fig. 5 is a flowchart showing path setting with station B 102 by the transmission device of station A 101 of this embodiment based on the first and second binding information (physical ports and wavelength paths) between service using devices 1a, 2a and 1b, 2b shown in Fig. 4. This binding information between logical paths and physical ports and commands are exchanged between station A 101 and station B 102, which are opposite nodes, via OSC light.

[0049] As an initial setting, it is assumed that the control device 400 logs in to the A station 101 and the downstream B station 102, sets each device to a state in which it can accept path setting instructions, and enables the function of the path setting instruction unit 502 of each device.

[0050] After the initial setting, the control device 400 first makes a normal path setting request to the station A 101 (step S0).

[0051] The path setting execution unit 500 of the station A 101 performs path setting for its own device based on the path information table 503 received together with the path setting request signal from the control device 400 (step S1).

[0052] Station A 101 checks the status (path setting execution flag) of station B 102 through autonomous operation of node status check function unit 501 (step S2). Then, node status check function unit 501 reads the status check response (step S3).

[0053] The node status check function unit 501 of the station A 101 judges the result of reading the status of the station B 102 (step S4), and if it is read, the station A 101 issues a path setting instruction to the station B 102 through the autonomous operation of the path setting instruction unit 502 (step S5).

[0054] Then, station B 102 performs path setting for its own device based on path information table 503 received together with the path setting instruction signal from station A 101 (step S6). After completing the path setting, station B 102 transmits a path setting completion notification to station A 101, which is the source of the path setting instruction (step S7).

[0055] Upon receiving the path setup completion notification, station A 101 sets the path setup completion flag 504 to the theoretical value "1" (executed) (step S8).

[0056] Thereafter, the station A 101 transmits a path setting completion notice to the control device 400 that has requested the path setting (step S9), and the path setting operation between the station A 101 and the station B 102 is now complete.

[0057] In Figure 4, OTN device 1 (station A 101) and OTN device 2 (station B 102) are transmission devices installed at a distance from each other, and are installed to enable communication between devices using OTN services at the stations where the transmission devices are installed. OTN service-using device 1a and OTN service-using device 1b are devices that need to communicate with each other, and OTN service-using device 2a and OTN service-using device 2b are also devices that need to communicate with each other. As shown in OTN device 2 (station B) in Figure 4, OTN service-using device 1a and OTN service-using device 2b, and OTN service-using device 2a and OTN service-using device 1b are devices for different purposes and are not intended to be connected. Therefore, any OTN device settings that result in these devices being connected to each other are unintended and incorrect.

[0058] According to this embodiment, when a control device 400 such as a personal computer is directly connected to a node during initial setup immediately after the node is installed, incorrect setting of the linking information between the logical path and the physical port shown in OTN device 2 (station B) in Figure 4 can be avoided.

[0059] (Overview of operation) An overview of the operation of this embodiment is shown in Fig. 6. First, the control device 400 sets, to the OTN device 1 (station A 101), information linking the OTN logical path 1 (hereinafter referred to as path 1) and the physical port 1 that uses path 1 (a).

[0060] Next, the linking information between Path 1 and Physical Port 1 is sent via OSC light to OTN device 2 (station B 102) of the opposite node (b).

[0061] Next, OTN equipment 2 (station B 102) that received the linking information does not require control device 400, and configures OTN equipment 2 (station B 102) based on the linking information between path 1 and physical port 1 received via OSC light, and sends a message to the source OTN equipment 1 (station A 101) that the linking configuration between path 1 and physical port 1 has been successfully completed (c).

[0062] Next, the controller 400 is notified that both nodes have been properly configured, and (d) the configuration work is completed.

[0063] (Explanation of effect) According to this embodiment, it is possible to match the logical path information and physical port binding between the OTN device 1 and OTN device 2, which exchange configuration information via OSC light. This makes it possible to avoid configuration inconsistencies that can occur when the logical path information and physical port binding are performed individually at each node. Furthermore, by performing configuration only at one node, it is possible to omit the configuration work at the opposite node, thereby reducing the burden of the installation work.

[0064] While the above explanation aims to prevent misconfiguration of logical path information and physical port linkage in OTN, it can also be applied to cases where the linkage of assigned time slots and physical ports in communications using STM (Synchronous Transfer Mode) is performed via a control channel. For example, a 1.5M service in ISDN (Integrated Services Digital Network) has 23 time slots and one control channel. If linkage information between the 23 time slots and the physical devices using the communications of each time slot is transmitted via this control channel, misconfiguration between the two nodes can be prevented and the configuration work can be simplified.

[0065] According to this embodiment, at a node in a transmission system, information linking logical path settings and physical ports is sent to a counterpart node via a control channel (OSC light), and the counterpart node can automatically link the logical path and physical port based on the information received via the control channel.

[0066] According to this embodiment, the path setting method and its setting can be performed from the control device 400 directly connected to the device, regardless of instructions from the operation support system OSS.

[0067] According to this embodiment, the transmission device utilizes OTN technology, and the logical path setting information is path information in an OTN frame format such as OTU (Optical-channel Transport Unit) x or ODU (Optical channel Data Unit) x, and this path information can be exchanged via OSC light together with the physical port information that links it.

[0068] In this embodiment, the core network is described as being configured with optical fiber transmission lines 11 in a ring redundant configuration, but it may also be configured as being connected point-to-point, and in that case the above-mentioned effects can still be achieved. [Explanation of symbols]

[0069] 10 Network 11 Optical transmission line 101 A station 102 B station 1xx X station 201 Monitoring and control unit 302 CPU 303 Memory section 400 control device 401 Information holding section 402 Path setting request section 403 Setting result receiver 500 Path setting execution unit 501 Node status check function unit 502 Path setting instruction section 503 Path Information Table

Claims

1. In a transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, and a plurality of nodes connected to the transmission path and each having a plurality of physical ports, a control device is connected to one node and performs path setting for linking and connecting one of the plurality of logical paths to one of the plurality of physical ports in each of the plurality of nodes, a linking information storage unit that stores first linking information between a physical port of a first device connected to the first node and one logical path, and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request unit that causes the first node to execute the path setting based on the first binding information, and that transmits the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; a setting result receiving unit that receives a result of the path setting from the one node via the control channel from the other node; A control device comprising:

2. 2. The control device according to claim 1, wherein each of the plurality of nodes executes the path setting based on the linking information and includes a completion notification sending unit that returns the execution result of the path setting to a requesting party.

3. In a transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, and a plurality of nodes connected to the transmission path and each having a plurality of physical ports, a path setting method by a control device connected to one node and performing path setting for linking and connecting one of the plurality of logical paths to one of the plurality of physical ports in each of the plurality of nodes, comprising: a linking information holding step for holding first linking information between a physical port of a first device connected to the first node and one logical path and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request step of causing the first node to execute the path setting based on the first binding information, and transmitting the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; and a setting result receiving step of receiving a result of the path setting from the other node via the control channel from the one node.

4. In a transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, and a plurality of nodes connected to the transmission path and each having a plurality of physical ports, a computer is installed in a control device connected to one node and configured to perform path setting for linking and connecting one of the plurality of logical paths to one of the plurality of physical ports in each of the plurality of nodes, a linking information storage unit that stores first linking information between a physical port of a first device connected to the first node and one logical path, and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request unit that causes the first node to execute the path setting based on the first binding information, and that transmits the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; a program causing the program to function as a setting result receiving unit that receives the result of the path setting from the other node via the control channel from the one node;

5. A transmission system including a transmission path formed by a plurality of logical paths for data transfer and a control channel, a plurality of nodes connected to the transmission path and each having a plurality of physical ports, and a control device connected to one node and performing path setting for linking and connecting one of the plurality of logical paths to one of the plurality of physical ports in each of the plurality of nodes, The control device a linking information storage unit that stores first linking information between a physical port of a first device connected to the first node and one logical path, and second linking information between a physical port of a second device connected to another node and being a communication destination of the first device and the one logical path; a path setting request unit that causes the first node to execute the path setting based on the first binding information, and that transmits the second binding information from the first node to the other node via the control channel to cause the other node to execute the path setting based on the second binding information; a setting result receiving unit that receives a result of the path setting from the one node via the control channel from the other node, Each of the plurality of nodes has a completion notification sending unit that executes the path setting based on the linking information and returns the execution result of the path setting to a requesting destination. A transmission system characterized in that:

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