JP2008259129A - Optical network system using optical cross-connect apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical network system by which an optical cross-connect device using a wavelength selection switch incorporating no optical switch is applicable to an optical network. <P>SOLUTION: In this system, the optical connect device provided with an optical switch group is disposed in one of a star type, a ring type, and a mesh type between a wavelength selection switch group of input-side switches having no optical switch inside and a wavelength selection switch group of output-side wavelength switches, where a wavelength is selected from a wavelength editing signal from a management device for multiplexed wavelength multiplex light from a terminal device and the light is transmitted by switching a line of the wavelength based upon a line switching signal to carry out communication. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical network system using an optical cross-connect device.

  In an optical communication system, the transmission capacity is increased by using wavelength division multiplexing (WDM). In this WDM, light having a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed light in order to edit each wavelength in a batch and perform signal processing such as route setting for each generated wavelength group A cross-connect device is used.

  A conventional optical cross-connect device will be described.

  FIG. 24 shows a configuration of a conventional optical cross-connect device.

  The optical cross-connect device shown in FIG. 1 includes a control unit 20 that manages wavelengths and outputs a wavelength editing signal and a route switching signal, and four wavelength selective switches 10 on each of the input side and the output side. When wavelength multiplexed light is input to the wavelength selection switch 10 on the input side, the wavelength selected based on the wavelength editing signal and the route switching signal from the control unit 20 is output to one of the wavelength selection switches 10 on the output side. (For example, refer nonpatent literature 1).

  The optical cross-connect device configured as described above is applied to an optical network such as a star type, a ring type, or a mesh type.

  The configuration of the wavelength selective switch in the configuration of FIG. 24 is shown in FIG.

  The wavelength selective switch 10 shown in FIG. 25 has one input and N outputs (1 × N), and is connected to one branching filter 11, a plurality of optical switches 12 connected to the branching filter 11, and the optical switch 12. It is composed of a plurality of multiplexers 13.

The demultiplexer 11 shown in the figure demultiplexes wavelength multiplexed signal light consisting of n channels of λ ₁ , λ ₂ ,..., Λ _n inputted from one input port into n optical switches. 12, the wavelength light output from each optical switch 12 is multiplexed and output by the multiplexer 13. That is, the same number of optical switches as the number of channels of wavelength multiplexed signal light are required. In the example of FIG. 25, the input wavelength multiplexed signal light of λ ₁ , λ ₂ ,..., Λ ₁₁ is demultiplexed into 11 and output to 11 optical switches 12.

  Each optical switch 12 has one input port and M (M is the number of multiplexers) output ports, and switches any WDM input light that is input to output to any multiplexer 13. To do.

The multiplexer 13 combines the wavelengths input from the optical switch 12 and outputs them. In the example of FIG. 25, four multiplexers are provided, and the combined wavelengths λ _{1 to} λ ₃ , λ _{4 to} λ ₆ , λ _{7 to} λ ₈ , and λ _{9 to} λ ₁₁ are output.
Lei Zong, Philip Ji, Ting Wang, Osamu Matsuda, Milorad Cvijetic, "Study on Wave length Cross-Connect Realized with Wavelength Selective Switches", Optical Fiber Communications 2006.

  However, the wavelength selective switch in the conventional optical cross-connect device requires as many optical switches as the number of paths branched by the branching filter. In other words, optical switches are required as many as the number of wavelengths of wavelength multiplexed signal light. Therefore, when the number of wavelengths increases, the insertion loss of the wavelength selective switch increases, and an optical cross-connect device using such a wavelength selective switch in an optical network. There is a problem that the cost increases when applying. In particular, when an optical cross-connect device having a conventional configuration is applied to a plurality of nodes such as a ring type and a mesh type, the cost increases as the number of arranged nodes increases.

  The present invention has been made in view of the above points, and an object thereof is to provide an optical network system in which an optical cross-connect device using a wavelength selective switch that does not include an optical switch can be applied to an optical network. .

  FIG. 1 is a principle configuration diagram of the present invention.

The present invention (Claim 1) is a star-type optical network system using an optical cross-connect device,
A plurality of terminal devices 4 that communicate by inputting and outputting wavelength light;
A multiplexing device 3 connected to the terminal device 4 and multiplexing the wavelength light input from the terminal device 4;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexing device 3 are arranged in parallel; the first wavelength selective switch group; An optical cross-connect device 1 comprising a second wavelength selective switch group having a similar configuration, and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, the wavelength selection signal for selecting the wavelength and the path switching signal for switching the path to the optical cross-connect device 1 , And a management device 2 that transmits and receives control signals to and from the terminal device 4,
Have
This is an optical network system in which the optical cross-connect device 1 is arranged at the core of a star network.

The present invention (Claim 2) is a star-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A network device that houses the terminal device;
A multiplexing device that multiplexes wavelengths input from a terminal device via a network device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexing device are arranged in parallel, and the same as the first wavelength selective switch group An optical cross-connect device comprising a second wavelength selective switch group having the configuration: and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a route switching signal for switching the route are transmitted to the optical cross-connect device. A management device that outputs and transmits control signals to and from the terminal device and the network device;
Have
This is an optical network system in which an optical cross-connect device is arranged at the core of a star network.

The present invention (Claim 3) is a ring-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A multiplexing device connected to the terminal device and multiplexing the wavelength light input from the terminal device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexing device are arranged in parallel, and the same as the first wavelength selective switch group A plurality of optical cross-connect devices comprising a second wavelength selective switch group having the configuration of: and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, the wavelength selection signal for selecting the wavelength and the route switching signal for switching the route are selected for the optical cross-connect device. A management device that outputs and transmits and receives control signals to and from the terminal device;
Have
This is an optical network system in which a plurality of optical cross-connect devices are arranged in a ring network.

The present invention (Claim 4) is a ring-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A network device that houses the terminal device;
A multiplexing device that multiplexes wavelengths input from a terminal device via a network device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexing device are arranged in parallel, and the same as the first wavelength selective switch group A plurality of optical cross-connect devices comprising a second wavelength selective switch group having the configuration of: and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a route switching signal for switching the route are transmitted to the optical cross-connect device. A management device that outputs and transmits control signals to and from the terminal device and the network device;
Have
This is an optical network system in which a plurality of optical cross-connect devices are arranged in a ring network.

The present invention (Claim 5) is a mesh-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A multiplexing device connected to the terminal device and multiplexing the wavelength light input from the terminal device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexing device are arranged in parallel, and the same as the first wavelength selective switch group A plurality of optical cross-connect devices comprising a second wavelength selective switch group having the configuration of: and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, the wavelength selection signal for selecting the wavelength and the route switching signal for switching the route are selected for the optical cross-connect device. A management device that outputs and transmits and receives control signals to and from the terminal device;
Have
This is an optical network system in which a plurality of optical cross-connect devices are arranged in a mesh network.

The present invention (Claim 6) is a mesh-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A network device that houses the terminal device;
A multiplexing device that multiplexes wavelengths input from a terminal device via a network device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexing device are arranged in parallel, and the same as the first wavelength selective switch group A plurality of optical cross-connect devices comprising a second wavelength selective switch group having the configuration of: and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a route switching signal for switching the route are transmitted to the optical cross-connect device. A management device that outputs and transmits control signals to and from the terminal device and the network device;
Have
This is an optical network system in which a plurality of optical cross-connect devices are arranged in a mesh network.

Further, according to the present invention (Claim 7), the first wavelength selective switch group and the second wavelength selective switch group of the optical cross-connect device according to Claims 1 to 6,
Demultiplexing means for mapping the wavelength multiplexed signal light input from the input port based on the wavelength, and outputting from the N output ports;
When a plurality of mapped wavelength lights output from the demultiplexing means are input from a plurality of input ports, a plurality of multiplexing means for spatially recombining the wavelength lights and outputting from the output port;
A wavelength selective switch having

Further, according to the present invention (Claim 8), the first wavelength selective switch group and the second wavelength selective switch group of the optical cross-connect device according to Claims 1 to 6,
Dividing for each wavelength band of wavelength multiplexed signal light input from the input port, and having a plurality of band division filters that output from the output port,
The band division filter outputs one wavelength light divided for each wavelength band to the outside as it is from the first output port, and outputs the other wavelength light to the band division filter of the next stage,
The last band dividing filter is composed of a wavelength selective switch that outputs the wavelength light divided for each wavelength band to the outside as it is.

Further, according to the present invention (Claim 9), the first wavelength selective switch group and the second wavelength selective switch group of the optical cross-connect device according to Claims 1 to 6,
Demultiplexing means for mapping the wavelength multiplexed signal light input from the input port based on the wavelength, and outputting from the N output ports;
An optical switch having the same number of channels of wavelength multiplexed signal light, which switches the wavelength light input from the demultiplexing means;
A multiplexing means for multiplexing and outputting the wavelength light input from the optical switch;
A wavelength selective switch having

  As described above, according to the present invention, by applying an optical cross-connect device capable of effectively reducing the number of optical switches to an optical network, the cost of each optical cross-connect device is reduced. In a ring type or mesh type optical network in which an optical cross-connect device is arranged, the cost of the entire system is reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the configuration of a basic optical cross-connect device of the present invention used for an optical network will be described.

  FIG. 2 shows a configuration of a basic optical cross-connect device of the present invention.

  The optical cross-connect device shown in FIG. 1 includes a plurality of wavelength selective switches 100 and a plurality of optical switches 300.

Optical switches ₃₀₀ 1 to 300 ₃ is provided between the wavelength selective switch 100b ₁ ~100b ₄ of the wavelength selective switch 100a ₁ ~100a ₄ and the output side of the input side.

  For example, the wavelength selective switch 100 has a configuration as shown in FIG.

  FIG. 3 is a configuration example (No. 1) of the wavelength selective switch applied to the basic optical cross-connect device of the present invention.

  As shown in FIG. 3, the wavelength selective switch 100 is a 1-input N-output (1 × N) switch, and includes a plurality of band division filters 111 as a wavelength selection function.

  When wavelength division multiplexed light is input, the wavelength selective switch 100 divides the wavelength division multiplexed signal light input from the input port for each wavelength band in the first stage band division filter 111a, and one of them is directly used as the output port. The other wavelength light is output to the band division filter 111b in the next stage. The band division filter 111b outputs all the divided wavelength lights to the output port. In the wavelength selective switch 100, which wavelength is selected and from which output port is output depends on the wavelength editing signal and the route switching signal.

  In addition to the above, a wavelength selective switch as shown in FIG. 4 can be used.

  FIG. 4 is a configuration example (No. 2) of the wavelength selective switch applied to the basic optical cross-connect device of the present invention.

  The wavelength selective switch 100 shown in the figure includes one duplexer 115 and n (three in FIG. 4) multiplexers 116.

The demultiplexer 115 is a 1 × N demultiplexer. When wavelength multiplexed signal light λ ₁ , λ ₂ ,..., Λ _n is input, mapping is performed for each wavelength based on control from the outside. Output to the device 116.

  The multiplexer 116 spatially recombines the wavelength axes of the wavelength light input from the demultiplexer 115 and outputs it for each group.

Specifically, wavelength multiplexed signal lights having wavelengths λ _{1 to} λ ₁₁ are input, of which λ _{1 to} λ ₃ are a first group, λ _{4 to} λ ₇ are a second group, and λ _{8 to} λ ₁₁ are a third group. Will be described.

When the wavelength multiplexed signal light λ _{1 to} λ ₁₁ is input from the input port of the demultiplexer 115, the demultiplexer 115 receives the first group of wavelength light to the multiplexer 116 ₁ and the second group. wavelength light to the multiplexer 116 _2, and outputs the wavelength of the third group to the multiplexer 116 _3.

As a result, each multiplexer 116 combines the wavelength light of each group input from the demultiplexer 115 and outputs the combined light from the output port. The first multiplexer 116 ₁ is for the first group of wavelengths, the second multiplexer 116 ₂ is for the second group of wavelengths, and the third multiplexer 116 ₃ is for the third group. Combines and outputs wavelength light.

Each of the wavelength selective switches 100a _{1 to} 100a ₄ on the input side having the above-described configuration selects the wavelength of the wavelength multiplexed signal light input from the input port based on the wavelength editing signal, and the optical switches 300 _{1 to} 300 _3. The optical switches 300 _{1 to} 300 ₃ switch the route based on the route switching signal, and output it to any of the wavelength selective switches 100b _{1 to} 100b ₄ on the output side. The wavelength selection switches 100b _{1 to} 100b ₄ on the output side select the wavelength of the wavelength light input from the optical switch 300 based on the wavelength editing signal, and output from each output port.

  An example in which the optical cross-connect device having the above configuration is applied to an optical network will be described below.

[First Embodiment]
In the present embodiment, an example will be described in which the optical cross-connect device shown in FIG. 2 is arranged in the core portion of a star-type optical network.

  FIG. 5 shows a configuration of an optical network using the optical cross-connect device according to the first embodiment of the present invention.

  The optical network shown in FIG. 1 includes an optical cross-connect device 1 having the configuration shown in FIG. 2, a management device 2 connected to the optical cross-connect device 1, a plurality of multiplexing devices 3 connected to the optical cross-connect device, It comprises a plurality of terminal devices 4 connected to the multiplexing device 3.

  The optical network shown in FIG. 5 is a star type, and multiplexing devices 3a to 3d are connected by optical fibers using the optical cross-connect device 1 as a hub, and terminal devices 4a to 4d are optically connected to the multiplexing devices 3a to 3d, respectively. It is the structure connected through the fiber. The optical network shown in the figure is an example in which a terminal device 4 used by a user is provided in a closed space in the same office as the management device 2.

  The management device 2 is connected to the topology information for managing the connection state in the optical network and the storage device 21 for managing the wavelength group. The management device 2 refers to the table in the storage device 21 and refers to the optical cross-connect device 1, A control signal is sent to the terminal device 4. The storage device 21 has a topology management information database storing connection bandwidths for each terminal device 4 as shown in FIG. 6, and a table for managing wavelengths as shown in FIG. The management device 2 selects a wavelength as a control signal to the optical cross-connect device 1 based on the wavelength request from the terminal device 4 that has been initiated with respect to the wavelength selective switch 100 in the optical cross-connect device 1. The wavelength editing signal is output, and a route switching signal for switching the wavelength route is output to the optical switch 300. Further, the management device 2 receives control signals from the optical cross-connect device 1 and the terminal device 4. A control signal (message) such as a wavelength request, a connection request, or a disconnection request is received from the terminal device 4. Further, the optical cross-connect device 1 receives a connection completion notification and a disconnection completion notification.

  The multiplexing device 3 groups the wavelengths transmitted from the terminal device 4 and outputs a wavelength multiplexed signal to the optical cross-connect device 1.

  The optical cross-connect device 1 can communicate between the terminal devices by transmitting the wavelength multiplexed signal input from the multiplexer 3 to the connection destination designated by the management device 2 by the above-described operation. To. The optical cross-connect device 1 acquires the number of wavelengths received from the management device 2 as the above-described wavelength editing signal, acquires the connection destination information as a route switching signal, and performs the operation described above with reference to FIG.

  Next, the operation of the optical network shown in FIG. 5 will be described.

(1) Operation when initiated from the terminal device 4a and disconnected from the terminal device 4a:
FIG. 8 is a sequence chart showing message transmission / reception in the first embodiment of the present invention.

  Step 101) The terminal device 4a transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device 4b.

  Step 102) Based on the received wavelength request, the management device 2 refers to the topology management information database (FIG. 6) of the storage device 21 and the table (FIG. 7) for managing the wavelength to the effect that the wavelength can be used. Is sent to the terminal device 4a. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 103) The terminal device 4a issues a connection request to the management device 2.

  Step 104) Based on the connection request, the management device 2 sends a connection command including the number of wavelengths (wavelength editing signal) and connection destination information (route switching signal to the terminal device 4b) to the optical cross-connect device 1. Send.

  Step 105) Based on the connection command from the management device 2, the optical cross-connect device 1 performs connection processing with the terminal device 4b.

  Step 106) When the connection processing is completed, the optical cross-connect device 1 transmits information indicating that the connection is completed to the management device 2.

  Step 107) The management device 2 transmits a connection completion notification to the terminal device 4a and the terminal device 4b.

  Step 108) Thereby, communication is established between the terminal device 4a and the terminal device 4b, and the management device 2 monitors communication between the terminal devices 4a and 4b. During this time, a plurality of wavelength lights are output from the terminal device 4a to the multiplexing device 3a, and the multiplexing device 3a multiplexes the wavelength light input from the terminal device 4a and outputs the multiplexed light to the optical cross-connect device 1. In the optical cross-connect device 1, the wavelength is selected based on the number of wavelengths (wavelength editing signal) of the connection command acquired from the management device 2 in step 105, and the wavelength light is selected based on the connection destination information (route switching signal). The path is switched and output to the multiplexer 3b. The multiplexing device 3b transmits the input wavelength light to the terminal device 4b. In this example, communication between the terminal device 4a and the terminal device 4b has been described as an example, but the same applies to other terminal devices.

  Step 109) The terminal device 4a transmits a disconnection request to the management device 2.

  Step 110) The management device 2 transmits a disconnection command to the optical cross-connect device 1.

  Step 111) The optical cross-connect device 1 performs a disconnection process between the terminal device 4a and the terminal device 4b based on the disconnection command.

  Step 112) When the disconnection processing is completed, the optical cross-connect device 1 transmits a disconnection completion notification to the management device 2.

  Step 113) The management device 2 transmits a disconnection completion notification to the terminal devices 4a and 4b.

(2) Operation when initiated from the terminal device 4b and disconnected from the terminal device 4a:
FIG. 9 is a sequence chart (part 2) illustrating message transmission / reception according to the first embodiment of this invention.

  Step 201) The terminal device 4b transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device a.

  Step 202) Based on the received wavelength request, the management device 2 can use the wavelength by referring to the topology management information database (FIG. 6) and the table (FIG. 7) managing the wavelength of the storage device 21. A message to that effect is transmitted to the terminal device 4b. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 203) The terminal device 4b issues a connection request to the management device 2.

  Step 204) Based on the connection request, the management device 2 refers to the information in the storage device 21 and sends the number of wavelengths (wavelength editing signal) and connection destination information (to the terminal device 4a) to the optical cross-connect device 1. A connection command consisting of a route switching signal is transmitted.

  Step 205) Based on the connection command from the management device 2, the optical cross-connect device 1 performs a connection process with the terminal device 4a.

  Step 206) When the connection processing is completed, the optical cross-connect device 1 transmits information indicating that the connection is completed to the management device 2.

  Step 207) The management device 2 transmits a connection completion notification to the terminal device 4b and the terminal device 4a.

  Step 208) Thereby, communication is established between the terminal device 4b and the terminal device 4a, and the management device 2 monitors communication between the terminal devices 4b and 4a. During this time, a plurality of wavelength lights are output from the terminal device 4b to the multiplexing device 3b, and the multiplexing device 3b multiplexes the wavelength light input from the terminal device 4b and outputs the multiplexed light to the optical cross-connect device 1. In the optical cross-connect device 1, the wavelength is selected based on the number of wavelengths (wavelength editing signal) of the connection command acquired from the management device 2 in step 105, and the wavelength light is selected based on the connection destination information (route switching signal). The path is switched and output to the multiplexer 3a. The multiplexing device 3a transmits the input wavelength light to the terminal device 4a.

  Step 209) The terminal device 4a transmits a disconnection request to the management device 2.

  Step 210) The management device 2 transmits a disconnection command to the optical cross-connect device 1.

  Step 211) The optical cross-connect device 1 performs a disconnection process between the terminal device 4a and the terminal device 4b based on the disconnection command.

  Step 212) When the disconnecting process is completed, the optical cross-connect device 1 transmits a disconnection completion notification to the management device 2.

  Step 213) The management device 2 transmits a disconnection completion notification to the terminal devices 4a and 4b.

[Second Embodiment]
In this embodiment, a configuration in which a network device is added to the configuration of the first embodiment will be described.

  FIG. 10 shows the configuration of a star network using the optical cross-connect device according to the second embodiment of the present invention.

  The optical network shown in the figure is obtained by adding the network device 5 to the configuration shown in FIG. 5, and the other configurations are the same as those shown in FIG. The optical network shown in FIG. 10 has a configuration in which a network device 5 and an external terminal device 4 are connected.

  The network device 5 is a device that accommodates the terminal device 4 and manages a user account and login from the user, and is provided between the terminal device 4 and the multiplexing device 3. Although FIG. 8 shows an example in which one terminal device is connected to one network device 5, a plurality of terminal devices may be connected, and storage means ( (Not shown). When accessed from the terminal device 4 accommodated by the device, the network device 5 can perform authentication and billing processing based on user information held in an internal storage unit. In addition, user information is registered in the management apparatus 2, and the network apparatus 5 and the management apparatus 2 communicate with each other, so that the user information stored in a storage unit (not shown) of the management apparatus is used. Authentication and billing processing can also be performed. When the user is authenticated as valid, the network device 5 outputs the wavelength signal input from the terminal device 4 of the user to the multiplexing device 3.

  As in the first embodiment, the management device 2 includes a storage device 21 for managing topology information and wavelength groups, a topology management information database (FIG. 6) of the storage device 21 and a table for managing wavelengths. With reference to FIG. 7, a control signal is transmitted to the optical cross-connect device 1, the network device 5, and the terminal device 4. The management device 2 selects a wavelength as a control signal to the optical cross-connect device 1 based on the wavelength request from the terminal device 4 that has been initiated with respect to the wavelength selective switch 100 in the optical cross-connect device 1. The wavelength editing signal is output, and a route switching signal for switching the wavelength route is output to the optical switch 300. Further, the management device 2 receives control signals from the optical cross-connect device 1, the terminal device 4, and the network device 5. A control signal (message) such as a wavelength request, a connection request, or a disconnection request is received from the terminal device 4. Further, the optical cross-connect device 1 and the network device 5 receive a connection completion notification and a disconnection completion notification.

  The operation of the multiplexer 3 is the same as that of the first embodiment.

  Next, the operation of the optical network shown in FIG. 10 will be described.

(1) Operation when initiated from the terminal device 4a and disconnected from the terminal device 4a:
FIG. 11 is a sequence chart showing message transmission / reception in the second embodiment of the present invention.

  Step 301) The terminal device 4a transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device 4b.

  Step 302) Based on the received wavelength request, the management device 2 refers to the topology management information database (FIG. 6) of the storage device 21 and the table (FIG. 7) for managing the wavelengths to the effect that the wavelengths can be used. Is sent to the terminal device 4a. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 303) The terminal device 4a issues a connection request to the management device 2.

  Step 304) Based on the connection request, the management device 2 refers to the topology management information database (FIG. 6) and the wavelength management table (FIG. 7) in the storage device 21, and accommodates the terminal device 4b that is the connection destination. The network device 5b to be searched is searched, and a connection command including the number of wavelengths (wavelength editing signal) and connection destination information (route switching signal to the network device 5b) is transmitted to the optical cross-connect device 1.

  Step 305) The management device 2 refers to the information in the storage device 21 to the network device 5a and transmits a connection command including the number of wavelengths and connection destination information.

  Step 306) The network device 5a connects to the terminal device 4b which is the connection destination based on the connection command from the management device 2.

  Step 307) Based on the connection destination information of the connection command from the management apparatus 2 in Step 304, the optical cross-connect device 1 connects to the network device 5b that is the connection destination.

  Step 308) The optical cross-connect device 1 transmits a completion notification that the connection with the connection destination is completed to the management device 2.

  Step 309) The management device 2 refers to the information in the storage device 21 to the network device 5b accommodating the terminal device 4b, and transmits a connection command including the number of wavelengths and connection destination information (terminal device 4b).

  Step 310) Based on the connection command from the management device 2, the network device 5b connects to the terminal device 4b that is the connection destination, and transmits a connection completion notification to the management device 2.

  Step 311) The management device 2 transmits a connection completion notification to the terminal devices 4a and 4b.

  Step 312) The management device 2 establishes and monitors communication between the terminal devices 4a and 4b. Since this operation is the same as the operation in step 108 and step 208 in the first embodiment, the description thereof is omitted.

  Step 313) The management device 2 receives the disconnection request from the terminal device 4a.

  Step 314) The management device 2 transmits a disconnection command including the number of wavelengths and connection destination information to the optical cross-connect device 1.

  Step 315) Further, the management device 2 refers to the information in the storage device 21 to the network device 5a that accommodates the terminal device 4a, and transmits a disconnection command including the number of wavelengths and connection destination information.

  Step 316) The network device 5a disconnects from the connection destination based on the connection destination information, and transmits a completion notification to the management device 2.

  Step 317) Based on the connection destination information of the disconnection command received in Step 314, the optical cross-connect device 1 disconnects the connection with the connection destination.

  Step 318) The optical cross-connect device 1 transmits a disconnection completion notification to the management device 2.

  Step 319) The management device 2 transmits a disconnection command including the number of wavelengths and connection destination information to the network device 5b that accommodates the terminal device 4b.

  Step 320) Based on the connection destination information of the disconnection instruction, the network device 5b disconnects the connection with the connection destination, and transmits a completion notification to the management device 2.

  Step 321) The management device 2 transmits a disconnection completion notification to the terminal devices 4a and 4b.

(2) Operation when initiated from the terminal device 4b and disconnected from the terminal device 4a:
FIG. 120 is a sequence chart (part 2) illustrating message transmission / reception in the second embodiment of the present invention.

  Step 401) The terminal device 4b transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2.

  Step 402) The management device 2 refers to the topology management information database (FIG. 6) of the storage device 21 and the table (FIG. 7) for managing the wavelengths, and sends a message to the terminal device 4b that the wavelength is usable. Send. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 403) The terminal device 4b issues a connection request to the management device 2.

  Step 404) Based on the connection request, the management device 2 refers to the topology management information database (FIG. 6) in the storage device 21 and searches for the network device 5a that accommodates the terminal device 4a that is the connection destination. A connection command including the number of wavelengths (wavelength editing signal) and connection destination information (a route switching signal to the network device 5a) is transmitted to the optical cross-connect device 1.

  Step 405) The management apparatus 2 transmits a connection command including the number of wavelengths and connection destination information to the network apparatus 5a.

  Step 406) The network device 5a connects to the terminal device 4a which is the connection destination based on the connection command from the management device 2.

  Step 407) Based on the connection destination information (route switching signal to the network device 5a) of the connection command from the management device 2 in Step 304, the optical cross-connect device 1 connects to the network device 5a that is the connection destination. I do.

  Step 408) The optical cross-connect device 1 transmits a completion notification that the connection with the connection destination is completed to the management device 2.

  Step 409) The management device 2 refers to the information in the storage device 21 to the network device 5b that accommodates the terminal device 4b, and transmits a connection command including the number of wavelengths and connection destination information (terminal device 4b).

  Step 410) Based on the connection command from the management device 2, the network device 5b establishes a connection with the terminal device 4b that is the connection destination, and sends a completion notification to the management device 2 that it has been completed.

  Step 411) The management device 2 transmits a connection completion notification to the terminal devices 4a and 4b.

  Step 412) The management device 2 establishes and monitors communication between the terminal devices 4a and 4b. Since this operation is the same as the operation in step 108 and step 208 in the first embodiment, the description thereof is omitted.

  Step 413) The management device 2 receives the disconnection request from the terminal device 4a.

  Step 414) The management device 2 transmits a disconnection command including the number of wavelengths and connection destination information to the optical cross-connect device 1.

  Step 415) Further, the management device 2 transmits a disconnection command including the number of wavelengths and connection destination information to the network device 5a that accommodates the terminal device 4a.

  Step 416) The network device 5a disconnects the connection with the connection destination based on the connection destination information, and transmits a completion notification to the management device 2.

  Step 417) Based on the connection destination information of the disconnection command received at Step 414, the optical cross-connect device 1 disconnects the connection with the connection destination.

  Step 418) The optical cross-connect device 1 transmits a disconnection completion notification to the management device 2.

  Step 419) The management device 2 transmits a disconnection command including the number of wavelengths and connection destination information to the network device 5b that accommodates the terminal device 4b.

  Step 420) Based on the connection destination information of the disconnection command, the network device 5b disconnects the connection with the connection destination, and transmits a completion notification to the management device 2.

  Step 421) The management device 2 transmits a disconnection completion notification to the terminal devices 4a and 4b.

[Third Embodiment]
In this embodiment, a case will be described in which an optical cross-connect device is arranged in a ring-type optical network in which each node is connected to one cable on a loop.

  FIG. 13 shows the configuration of a ring-type optical network using the optical cross-connect device in the third embodiment of the present invention.

  In the optical network shown in FIG. 1, a plurality of optical cross-connect devices 1 are connected by optical fibers in a ring shape, and a multiplexing device 3 is connected to each optical cross-connect device 1, and a terminal is connected to each multiplexing device 3. A device 4 is connected.

  Similar to the first embodiment described above, the management device 2 exchanges control signals between the optical cross-connect device 1 and the terminal device 4. Since the contents of the exchanged control signals are the same as those in the first embodiment, description thereof is omitted. The management device 2 is connected to the storage device 21. The storage device 21 has a topology management information database as shown in FIG. 14 and a table for managing wavelengths as shown in FIGS.

  FIG. 16 shows the configuration of a ring-type optical network using the optical cross-connect device in the third embodiment of the present invention.

  The optical network shown in FIG. 1 includes an optical cross-connect device 1 arranged in a ring shape via an optical fiber, and a multiplexer 3 is connected to each optical cross-connect device 1 via an optical fiber. The terminal device 4 is connected to the control device via an optical fiber. The optical network shown in the figure is an example in which a terminal device 4 used by a user is provided in a closed space in the same office as the management device 2.

  The management device 2 includes a storage device 21 having topology management information (FIG. 14) and tables (FIGS. 7 and 15) for managing wavelength groups, and refers to the information in the storage device 21 to A control signal is sent to the cross-connect device 1 and the terminal device 4. The management device 2 selects a wavelength as a control signal to the optical cross-connect device 1 based on the wavelength request from the terminal device 4 that has been initiated with respect to the wavelength selective switch 100 in the optical cross-connect device 1. The wavelength editing signal is output, and a path switching signal for switching the wavelength path is output to the optical switch 300 as connection destination information. Further, the management device 2 receives control signals from the optical cross-connect device 1 and the terminal device 4. A control signal (message) such as a wavelength request, a connection request, or a disconnection request is received from the terminal device 4. Further, the optical cross-connect device 1 receives a connection completion notification and a disconnection completion notification.

  The operation of the multiplexing device 3 is to multiplex the wavelength light input from the terminal device 4 and output it to the optical cross-connect device 1 as in the first embodiment.

  Next, the operation of the optical network shown in FIG. 11 will be described.

  FIG. 12 is a sequence chart showing message transmission / reception in the third embodiment of the present invention. In the figure, it is assumed that the terminal device 4a initiates, the terminal device 4a issues a disconnection request, and the terminal device 4a communicates with the terminal device 4b.

  Step 501) The terminal device 4a transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device 4b.

  Step 502) Based on the received wavelength request, the management device 2 refers to the topology management information database of the storage device 21 and the table (FIGS. 7 and 15) for managing the wavelengths to the effect that the wavelengths can be used. Is sent to the terminal device 4a. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 503) The terminal device 4a issues a connection request to the management device 2.

  Step 504) Based on the connection request, the management device 2 refers to the information in the storage device 21, and sends the number of wavelengths (wavelength editing signal) and connection destination information (route switching) to the optical cross-connect device 1a. Signal) is transmitted.

  Step 505) Similarly, the management device 2 refers to the information in the storage device 21 based on the connection request, and sends the number of wavelengths (wavelength editing signal) and connection destination information (method) to the optical cross-connect device 1b. A connection command consisting of a path switching signal is transmitted.

  Step 506) The optical cross-connect device 1a performs connection processing based on the connection destination information of the connection command from the management device 2.

  Step 507) The optical cross-connect device 1b performs connection processing based on the connection information of the connection command from the management device 2.

  Step 508) The optical cross-connect device 1a transmits a connection completion notification to the management device 2.

  Step 509) The optical cross-connect device 1b transmits a connection completion notification to the management device 2.

  Step 510) The management device 2 transmits a connection completion notification to the terminal device 4a and the terminal device 4b.

  Step 511) Thereby, communication is established between the terminal device 4a and the terminal device 4b, and the management device 2 monitors communication between the terminal devices 4a and 4b. During this time, a plurality of wavelength lights are output from the terminal device 4a to the multiplexing device 3a, and the multiplexing device 3a multiplexes the wavelength light received from the terminal device 4a and outputs the multiplexed light to the optical cross-connect device 1a. The optical cross-connect device 1a selects a wavelength based on the number of wavelengths (wavelength editing signal) of the connection command acquired from the management device 2 in step 105, and based on the connection destination information (route switching signal), the optical cross-connect device The wavelength light path is switched and output to the device 1b. When wavelength multiplexed light is input from the optical cross-connect device 1a, the optical cross-connect device 1b selects a wavelength based on the number of wavelengths (wavelength editing signal) from the management device 2, and connects to the connection destination information (route switching signal). ) To the multiplexing device 3b connected to the terminal device 4b. The multiplexing device 3b transmits the input wavelength light to the terminal device 4b. In the present example, communication between the terminal device 4a and the terminal device 4b has been described as an example. Similarly, communication between other terminal devices is performed by sequentially tracing the optical cross-connect devices 1 arranged in a ring shape.

  Step 512) The terminal device 4a transmits a disconnection request to the management device 2.

  Step 513) The management device 2 transmits a disconnection command to the optical cross-connect device 1a.

  Step 514) The management device 2 transmits a disconnection command to the optical cross-connect device 1b.

  Step 515) The optical cross-connect device 1a performs a disconnection process based on the disconnection command.

  Step 516) The optical cross-connect device 1b performs a disconnection process based on the disconnection command.

  Step 517) When the disconnection process is completed, the optical cross-connect device 1a transmits a disconnection completion notification to the management device 2.

  Step 518) When the disconnection process is completed, the optical cross-connect device 1b transmits a disconnection completion notification to the management device 2.

  Step 519) The management device 2 transmits a disconnection completion notification to the terminal devices 4a and 4b.

[Fourth Embodiment]
In this embodiment, an optical cross-connect device is provided in a ring-type network as in the third embodiment, and a network device that accommodates an external terminal device is provided in the configuration of the third embodiment. It is different in point.

  FIG. 17 shows the configuration of a ring-type optical network using the optical cross-connect device in the fourth embodiment of the present invention.

  The network device 5 is provided between the multiplexing device 3 and the terminal device 4 accommodated in the network device 5. Since the function of the network device 5 is the same as that of the second embodiment, the description thereof is omitted. The present embodiment is different from the third embodiment in that the network device 5 is provided, so that the management device 2 exchanges control signals not with the terminal device 4 but with the network device 5.

  FIG. 18 is a sequence chart showing message transmission / reception in the fourth embodiment of the present invention. In the figure, it is assumed that the terminal device 4a initiates, the terminal device 4a issues a disconnection request, and the terminal device 4a communicates with the terminal device 4b.

  Step 601) The terminal device 4a transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device 4b.

  Step 602) Based on the received wavelength request, the management device 2 can use the wavelength by referring to the topology management information database (FIG. 14) and the table (FIG. 15) managing the wavelength of the storage device 21. A message to that effect is transmitted to the terminal device 4a. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 603) The terminal device 4a issues a connection request to the management device 2.

  Step 604) The management device 2 refers to the information in the storage device 21 based on the wavelength request from the terminal device 4a to the network device 5a, and transmits a connection command including the number of wavelengths and connection destination information.

  Step 604) The network device 5a is connected to the terminal device 4a.

  Step 605) The network device 5a transmits a connection completion notification to the management device 2.

  Step 606) Based on the connection request from the terminal device 4a, the management device 2 transmits a connection command including the number of wavelengths and connection destination information to the network device 5b that accommodates the terminal device 4b.

  Step 607) The network device 5b connects to the terminal device 4b and transmits a connection completion notification to the management device 2.

  Step 608) Based on the connection request, the management device 2 refers to the information in the storage device 21 and sends the number of wavelengths (wavelength editing signal) and connection destination information (route switching signal) to the optical cross-connect device 1a. ) Is sent.

  Step 609) The optical cross-connect device 1a refers to the information in the storage device 21 based on the number of wavelengths and the connection destination information, and performs a connection process with the optical cross-connect device 1b.

  Step 610) The optical cross-connect device 1a transmits a connection completion notification to the management device 2.

  Step 611) Based on the connection request from the terminal device 4a, the management device 2 sends a connection command comprising the number of wavelengths (wavelength editing signal) and connection destination information (route switching signal) to the optical cross-connect device 1b. Send.

  Step 612) The optical cross-connect device 1b performs connection processing based on the number of wavelengths and connection destination information.

  Step 613) The optical cross-connect device 1b transmits a connection completion notification to the management device 2.

  Step 614) The management device 2 transmits a connection completion notification to the terminal device 4a.

  Step 615) The management device 2 transmits a connection completion notification to the terminal device 4b.

  Step 616) When communication is established between the terminal device 4a and the terminal device 4b, the management device 2 monitors communication between the terminal devices 4a and 4b. During this time, a plurality of wavelength lights are output from the terminal device 4a to the multiplexing device 3a, and the multiplexing device 3a multiplexes the wavelength light received from the terminal device 4a and outputs the multiplexed light to the optical cross-connect device 1a. In the optical cross-connect device 1a, the wavelength is selected based on the number of wavelengths (wavelength editing signal) of the connection command acquired from the management device 2 in step 611, and based on the connection destination information (route switching signal) The wavelength light path is switched and output to the device 1b. When wavelength multiplexed light is input from the optical cross-connect device 1a, the optical cross-connect device 1b selects a wavelength based on the number of wavelengths (wavelength editing signal) from the management device 2, and connects to the connection destination information (route switching signal). ) To the multiplexing device 3b connected to the terminal device 4b. The multiplexing device 3b transmits the input wavelength light to the terminal device 4b. In the present example, communication between the terminal device 4a and the terminal device 4b has been described as an example. Similarly, communication between other terminal devices is performed by sequentially tracing the optical cross-connect devices 1 arranged in a ring shape.

  Step 617) The terminal device 4a transmits a disconnection request to the management device 2.

  Step 618) The management device 2 transmits a disconnection command to the network device 5a.

  Step 619) The management device 2 transmits a disconnection command to the network device 5b.

  Step 620) The network device 5a disconnects the connection with the terminal device 4a and transmits a disconnection completion notification to the management device 2.

  Step 621) The network device 5b disconnects the connection with the terminal device 4b and transmits a disconnection completion notification to the management device 2.

  Step 622) The management device 2 transmits a disconnection command to the optical cross-connect device 1a.

  Step 623) The management device 2 transmits a disconnection command to the optical cross-connect device 1b.

  Step 624) The optical cross-connect device 1a disconnects the connection in Step 609.

  Step 625) The optical cross-connect device 1b disconnects the connection in Step 612.

  Step 626) When the disconnection processing is completed, the optical cross-connect device 1a transmits a disconnection completion notification to the management device 2.

  Step 627) When the disconnection processing is completed, the optical cross-connect device 1b transmits a disconnection completion notification to the management device 2.

  Step 628) The management device 2 transmits a disconnection completion notification to the terminal device 4a.

  Step 629) The management device 2 transmits a disconnection completion notification to the terminal device 4b.

[Fifth embodiment]
In the present embodiment, the case where the optical cross-connect device is arranged in a mesh network will be described.

  FIG. 19 shows the configuration of a mesh-type optical network using the optical cross-connect device in the fifth embodiment of the present invention.

  The optical network shown in FIG. 1 is a mesh type in which four optical cross-connect devices 1 are connected via an optical fiber in a point-to-point manner. Each optical cross-connect device 1 has a multiplexing device 3. The multiplexers 3 are connected by optical fibers, and the multiplexers 3 are configured to accommodate terminal devices 4 connected by optical fibers. The optical network shown in the figure is an example in which a terminal device 4 used by a user is provided in a closed space in the same office as the management device 2.

  Since the optical cross-connect device 1, the multiplexing device 3, the terminal device 4, and the management device 2 are the same as the functions of the first embodiment, description thereof is omitted. The management device 2 is connected to a storage device 21 having topology management information as shown in FIG. 20 and a table for managing wavelengths as shown in FIGS.

  For example, when the management device 2 receives a connection request from the terminal device 4a to the terminal device 4b, the message transmission / reception method is the same sequence as in the third embodiment.

  The case where there is a connection request from the terminal device 4a to the terminal device 4c will be described below.

  FIG. 21 is a sequence chart showing message transmission / reception in the fifth embodiment of the present invention.

  Step 701) The terminal device 4a transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device 4c.

  Step 702) Based on the received wavelength request, the management device 2 refers to the topology management information database (FIG. 20) of the storage device 21 and the table (FIGS. 7 and 15) for managing the wavelengths. A message indicating that it can be used is transmitted to the terminal device 4a. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 703) The terminal device 4a issues a connection request to the management device 2.

  Step 704) Based on the connection request, the management device 2 refers to the information in the storage device 21 and sends the number of wavelengths (wavelength editing signal) and connection destination information (route switching signal) to the optical cross-connect device 1a. ) Is sent.

  Step 705) Similarly, the management device 2 refers to the information in the storage device 21 based on the connection request, and sends the number of wavelengths (wavelength editing signal) and connection destination information (route) to the optical cross-connect device 1c. A connection command consisting of a switching signal is transmitted.

  Step 706) The optical cross-connect device 1a performs connection processing based on the connection destination information of the connection command from the management device 2.

  Step 707) The optical cross-connect device 1c performs connection processing based on the connection information of the connection command from the management device 2.

  Step 708) The optical cross-connect device 1a transmits a connection completion notification to the management device 2.

  Step 709) The optical cross-connect device 1c transmits a connection completion notification to the management device 2.

  Step 710) The management device 2 transmits a connection completion notification to the terminal device 4a and the terminal device 4c.

Step 711) Thereby, communication is established between the terminal device 4a and the terminal device 4c, and the management device 2 monitors communication between the terminal devices 4a and 4c. During this time, a plurality of wavelength lights are output from the terminal device 4a to the multiplexing device 3a, and the multiplexing device 3a multiplexes the wavelength light received from the terminal device 4a and outputs the multiplexed light to the optical cross-connect device 1a. The optical cross-connect device 1a selects a wavelength based on the number of wavelengths (wavelength editing signal) of the connection command acquired from the management device 2 in step 105, and based on the connection destination information (route switching signal), the optical cross-connect device The wavelength light path is switched and output to the device 1c. When wavelength multiplexed light is input from the optical cross-connect device 1a, the optical cross-connect device 1c selects a wavelength based on the number of wavelengths (wavelength editing signal) from the management device 2, and connects to destination information (route switching signal). ) To the multiplexing device 3c connected to the terminal device 4c. The multiplexing device 3c transmits the input wavelength light to the terminal device 4c. In addition,
Step 712) The terminal device 4a transmits a disconnection request to the management device 2.

  Step 713) The management device 2 transmits a disconnection command to the optical cross-connect device 1a.

  Step 714) The management device 2 transmits a disconnection command to the optical cross-connect device 1c.

  Step 715) The optical cross-connect device 1a performs a disconnection process based on the disconnection command.

  Step 716) The optical cross-connect device 1c performs a disconnection process based on the disconnection command.

  Step 717) When the disconnection processing is completed, the optical cross-connect device 1a transmits a disconnection completion notification to the management device 2.

  Step 718) When the disconnecting process is completed, the optical cross-connect device 1c transmits a disconnection completion notification to the management device 2.

  Step 719) The management device 2 transmits a disconnection completion notification to the terminal devices 4a and 4c.

[Sixth Embodiment]
In the present embodiment, as in the fifth embodiment, an optical cross-connect device is arranged in a mesh-type optical network.

  FIG. 22 shows the configuration of a mesh-type optical network using the optical cross-connect device in the sixth embodiment of the present invention. The optical network shown in the figure is different from the fifth embodiment in that a network device 5 that accommodates a terminal device 4 is used for each multiplexing device 3 connected to each optical cross-connect device 1.

  In the optical network shown in the figure, the management device 2 transmits a control signal to the network device 5 accommodating the terminal device 4 instead of the terminal device 4. Note that the information stored in the storage device 21 connected to the management device 2 is the same as in the fifth embodiment.

  FIG. 23 is a sequence chart showing message transmission / reception in the sixth embodiment of the present invention. In the figure, a case where there is a connection request from the terminal device 4a to the terminal device 4c will be described.

  Step 801) The terminal device 4a transmits a wavelength request including the number of wavelengths and connection destination information to the management device 2. Here, the connection destination is the terminal device 4c.

  Step 802) Based on the received wavelength request, the management device 2 refers to the topology management information (FIG. 20) stored in the storage device 21 and the tables (FIGS. 7 and 15) for managing the wavelengths. Then, a message indicating that the wavelength can be used is transmitted to the terminal device 4a. At this time, if it cannot be used, a wavelength unavailable message is transmitted.

  Step 803) The terminal device 4a issues a connection request to the management device 2.

  Step 804) Based on the wavelength request from the terminal device 4a, the management device 2 refers to the information in the storage device 21 and transmits a connection command comprising the number of wavelengths and connection destination information to the network device 5a.

  Step 804) The network device 5a connects to the terminal device 4a.

  Step 805) The network device 5a transmits a connection completion notification to the management device 2.

  Step 806) The management device 2 refers to the information in the storage device 21 based on the connection request from the terminal device 4a, and consists of the number of wavelengths and the connection destination information for the network device 5c accommodating the terminal device 4c. Send a connection command.

  Step 807) The network device 5c connects to the terminal device 4c and transmits a connection completion notification to the management device 2.

  Step 808) Based on the connection request, the management device 2 refers to the information in the storage device 21 and sends the number of wavelengths (wavelength editing signal) and connection destination information (route switching signal) to the optical cross-connect device 1a. ) Is sent.

  Step 809) The optical cross-connect device 1a performs connection processing with the optical cross-connect device 1c based on the number of wavelengths and the connection destination information.

  Step 810) The optical cross-connect device 1a transmits a connection completion notification to the management device 2.

  Step 811) Based on the connection request from the terminal device 4a, the management device 2 refers to the information in the storage device 21 to the optical cross-connect device 1c, the number of wavelengths (wavelength editing signal) and connection destination information ( A connection command consisting of a route switching signal is transmitted.

  Step 812) The optical cross-connect device 1c performs connection processing based on the number of wavelengths and connection destination information.

  Step 813) The optical cross-connect device 1c transmits a connection completion notification to the management device 2.

  Step 814) The management device 2 transmits a connection completion notification to the terminal device 4a.

  Step 815) The management device 2 transmits a connection completion notification to the terminal device 4c.

  Step 816) When communication is established between the terminal device 4a and the terminal device 4c, the management device 2 monitors communication between the terminal devices 4a and 4c. During this time, a plurality of wavelength lights are output from the terminal device 4a to the multiplexing device 3a, and the multiplexing device 3a multiplexes the wavelength light received from the terminal device 4a and outputs it to the optical cross-connect device 1a. In the optical cross-connect device 1a, the wavelength is selected based on the number of wavelengths (wavelength editing signal) of the connection command acquired from the management device 2 in step 811, and the optical cross-connect is determined based on the connection destination information (route switching signal). The wavelength light path is switched and output to the device 1c. When wavelength multiplexed light is input from the optical cross-connect device 1a, the optical cross-connect device 1c selects a wavelength based on the number of wavelengths (wavelength editing signal) from the management device 2, and connects to destination information (route switching signal). ) To the multiplexing device 3c connected to the terminal device 4c. The multiplexing device 3c transmits the input wavelength light to the terminal device 4c.

  Step 817) The terminal device 4a transmits a disconnection request to the management device 2.

  Step 818) The management device 2 transmits a disconnection command to the network device 5a.

  Step 819) The management device 2 transmits a disconnection command to the network device 5c.

  Step 820) The network device 5a disconnects the connection with the terminal device 4a and transmits a disconnection completion notification to the management device 2.

  Step 821) The network device 5c disconnects the connection with the terminal device 4c and transmits a disconnection completion notice to the management device 2.

  Step 822) The management device 2 transmits a disconnection command to the optical cross-connect device 1a.

  Step 823) The management device 2 transmits a disconnection command to the optical cross-connect device 1c.

  Step 824) The optical cross-connect device 1a disconnects the connection made in Step 809.

  Step 825) The optical cross-connect device 1c disconnects the connection made in Step 812.

  Step 826) When the disconnection processing is completed, the optical cross-connect device 1a transmits a disconnection completion notification to the management device 2.

  Step 827) When the disconnection processing is completed, the optical cross-connect device 1c transmits a disconnection completion notification to the management device 2.

  Step 828) The management device 2 transmits a disconnection completion notification to the terminal device 4a.

  Step 829) The management device 2 transmits a disconnection completion notification to the terminal device 4c.

  It should be noted that the mesh-type connection forms in the fifth and sixth embodiments described above can be provided with redundancy that can cope with a failure. In this case, the management apparatus 2 can be realized by changing the route switching signal based on the topology information.

  The present invention is not limited to the above-described embodiment, and various modifications and applications can be made within the scope of the claims.

  The present invention can be applied to various configurations of a bus type, a star type, a ring type, and a mesh type of an optical network.

It is a principle block diagram of this invention. It is a block diagram of the basic optical cross-connect apparatus of this invention. It is a structural example (the 1) of the wavelength selective switch applied to the basic optical cross-connect apparatus of this invention. It is a structural example (the 2) of the wavelength selective switch applied to the basic optical cross-connect apparatus of this invention. 1 is a configuration diagram of a star-type optical network using an optical cross-connect device according to a first embodiment of the present invention. It is an example of a topology management information database (star type) in the storage device in the first embodiment of the present invention. 4 is an example of a table for managing wavelengths in the storage device according to the first embodiment of the present invention. It is a sequence chart (the 1) which shows transmission / reception of the message in the 1st Embodiment of this invention. It is a sequence chart (the 2) which shows transmission / reception of the message in the 1st Embodiment of this invention. It is a block diagram of the star type | mold optical network using the optical cross-connect apparatus in the 2nd Embodiment of this invention. It is a sequence chart (the 1) which shows transmission / reception of the message in the 2nd Embodiment of this invention. It is a sequence chart (the 2) which shows transmission / reception of the message in the 2nd Embodiment of this invention. It is a block diagram of the ring type optical network using the optical cross-connect apparatus in the 3rd Embodiment of this invention. It is a topology management information database example (ring type) in the 3rd embodiment of the present invention. It is an example of the table which manages the wavelength in the 3rd Embodiment of this invention. It is a sequence chart which shows transmission / reception of the message in the 3rd Embodiment of this invention. It is a block diagram of the ring type optical network using the optical cross-connect apparatus in the 4th Embodiment of this invention. It is a sequence chart which shows transmission / reception of the message in the 4th Embodiment of this invention. It is a block diagram of the mesh type | mold optical network using the optical cross-connect apparatus in the 5th Embodiment of this invention. It is an example of topology management information database (mesh type) in the fifth embodiment of the present invention. It is a sequence chart which shows transmission / reception of the message in the 5th Embodiment of this invention. It is a block diagram of the mesh type | mold optical network using the optical cross-connect apparatus in the 6th Embodiment of this invention. It is a sequence chart which shows transmission / reception of the message in the 6th Embodiment of this invention. It is a block diagram of the conventional optical cross-connect apparatus. It is a block diagram of the conventional wavelength selective switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical cross-connect apparatus 2 Management apparatus 3 Multiplexing apparatus 4 Terminal apparatus 5 Network apparatus 21 Memory | storage device, memory | storage means 100 Wavelength selection switch 111 Band division filter 115 Demultiplexer 116 Multiplexer 300 Optical switch

Claims (9)

A star-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A multiplexing device that is connected to the terminal device and multiplexes the wavelength light input from the terminal device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexer are arranged in parallel; the first wavelength selective switch group; An optical cross-connect device comprising a second wavelength selective switch group having a similar configuration, and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a path switching signal for switching the path to the optical cross-connect device. And a management device that transmits and receives control signals to and from the terminal device;
Have
An optical network system, wherein the optical cross-connect device is arranged in a core part of a star network. A star-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A network device accommodating the terminal device;
A multiplexing device that multiplexes wavelengths input from the terminal device via the network device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexer are arranged in parallel; the first wavelength selective switch group; An optical cross-connect device comprising a second wavelength selective switch group having a similar configuration, and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group;
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a path switching signal for switching the path to the optical cross-connect device. A management device that transmits and receives control signals between the terminal device and the network device,
Have
An optical network system, wherein the optical cross-connect device is arranged in a core part of a star network. A ring-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A multiplexing device that is connected to the terminal device and multiplexes the wavelength light input from the terminal device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexer are arranged in parallel; the first wavelength selective switch group; A plurality of optical cross-connect devices comprising a second wavelength selective switch group having the same configuration and a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group When,
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a path switching signal for switching the path to the optical cross-connect device. And a management device that transmits and receives control signals to and from the terminal device;
Have
An optical network system, wherein the plurality of optical cross-connect devices are arranged in a ring network. A ring-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A network device accommodating the terminal device;
A multiplexing device that multiplexes wavelengths input from the terminal device via the network device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexer are arranged in parallel; the first wavelength selective switch group; A second wavelength selective switch group having a similar configuration, and a plurality of optical cross-connect devices including a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group; ,
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a path switching signal for switching the path to the optical cross-connect device. A management device that transmits and receives control signals between the terminal device and the network device,
Have
An optical network system, wherein the plurality of optical cross-connect devices are arranged in a ring network. A mesh-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A multiplexing device that is connected to the terminal device and multiplexes the wavelength light input from the terminal device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexer are arranged in parallel; the first wavelength selective switch group; A second wavelength selective switch group having a similar configuration, and a plurality of optical cross-connect devices including a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group; ,
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a path switching signal for switching the path to the optical cross-connect device. And a management device that transmits and receives control signals to and from the terminal device;
Have
An optical network system, wherein the plurality of optical cross-connect devices are arranged in a mesh network. A mesh-type optical network system using an optical cross-connect device,
A plurality of terminal devices that communicate by inputting and outputting wavelength light; and
A network device accommodating the terminal device;
A multiplexing device that multiplexes wavelengths input from the terminal device via the network device;
A first wavelength selective switch group in which a plurality of wavelength selective switches that select and extract a signal of a specific wavelength from the wavelength multiplexed signal light input from the multiplexer are arranged in parallel; the first wavelength selective switch group; A second wavelength selective switch group having a similar configuration, and a plurality of optical cross-connect devices including a plurality of optical switch groups arranged between the first wavelength selective switch group and the second wavelength selective switch group; ,
With reference to the topology information and wavelength group information of the optical network stored in the storage means, a wavelength selection signal for selecting a wavelength and a path switching signal for switching the path to the optical cross-connect device. A management device that transmits and receives control signals between the terminal device and the network device,
Have
An optical network system, wherein the plurality of optical cross-connect devices are arranged in a mesh network. The first wavelength selective switch group and the second wavelength selective switch group of the optical cross-connect device are:
Demultiplexing means for mapping the wavelength multiplexed signal light input from the input port based on the wavelength, and outputting from the N output ports;
When a plurality of mapped wavelength lights output from the demultiplexing means are input from a plurality of input ports, a plurality of multiplexing means for spatially recombining the wavelength lights and outputting from the output port;
The optical network system according to any one of claims 1 to 6, comprising a wavelength selective switch having: The first wavelength selective switch group and the second wavelength selective switch group of the optical cross-connect device are:
Dividing for each wavelength band of wavelength multiplexed signal light input from the input port, and having a plurality of band division filters that output from the output port,
The band division filter outputs one wavelength light divided for each wavelength band to the outside as it is from the first output port, and outputs the other wavelength light to the next-stage band division filter,
The optical network system according to any one of claims 1 to 6, wherein the last-stage band division filter includes a wavelength selective switch that outputs the wavelength light divided for each wavelength band to the outside as it is. The first wavelength selective switch group and the second wavelength selective switch group of the optical cross-connect device are:
Demultiplexing means for mapping the wavelength multiplexed signal light input from the input port based on the wavelength, and outputting from the N output ports;
An optical switch having the same number as the number of channels of the wavelength multiplexed signal light, which switches the wavelength light input from the demultiplexing means;
A multiplexing means for multiplexing and outputting the wavelength light input from the optical switch;
7. The optical network system according to claim 1, further comprising a wavelength selective switch having the following.

Images