JP2008259132A - Optical cross-connect system and signal control method of optical cross-connect system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost by decreasing the number of optical switches in wavelength selection switches of an optical cross-connect system comprising an NNI and a UNI. <P>SOLUTION: In the optical cross-connect system, a wavelength selection switch on an input side of the NNI 100 is configured to select specified wavelength light from wavelength multiplex signal light and output it to an optical switch 120, a wavelength selection switch on an output side is configured to select wavelength light input from the optical switch and output it, and the optical switch is disposed between the input-side and output-side wavelength selection switches, the input wavelength light being switched and output to the output-side wavelength selection switch and a wavelength selection switch on an output side of the UNI 20. A wavelength selection switch on an input side of the UNI is configured to select wavelength light from the wavelength multiplex signal light, outputs the selected wavelength to the optical switch, and the output-side wavelength selection switch is configured to select the wavelength light output from the optical switch of the NNI and output it. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical cross-connect system and a signal control method in the optical cross-connect system, and in particular, in an optical wavelength division multiplexing (WDM) system, a wavelength multiplexed signal path on the NNI (Network Network Interface) side. The present invention relates to an optical cross-connect system that accommodates a user network interface (UNI) and its redundant system in an optical cross-connect device that performs switching, and a signal control method in the optical cross-connect system.

  A method of accommodating clients in a conventional optical cross-connect device on the NNI side in an optical wavelength division multiplexing system will be described below.

  In an optical communication system, the transmission capacity is increased by using wavelength division multiplexing (WDM) technology capable of propagating a plurality of different wavelengths of light on one optical fiber. In this WDM, there is an optical cross-connect device using a wavelength selective switch that extracts a specific wavelength signal from wavelength multiplexed signal light (see, for example, Non-Patent Document 1).

  FIG. 16 shows a system configuration for accommodating a conventional client.

  The system shown in FIG. 1 includes an NNI interface 10 (optical cross-connect device) and a user-side UNI interface 20 accommodated in the NNI interface 10. In the example of the figure, the NNI interface 10 includes a control unit 2 that manages wavelengths and outputs a wavelength editing signal and a route switching signal, and four wavelength selective switches 1a and 1b on the input side and the output side, respectively. An optical cross-connect device that is provided and performs path switching of wavelength-multiplexed optical signals based on wavelength channels. The UNI interface 20 is provided with wavelength selective switches 1c and 1d similar to the NNI interface 10 on the input and output sides.

  The wavelength selective switch 1 a on the input side of the NNI interface 10 outputs the selected wavelength to each wavelength selective switch 1 b on the output side of the NNI interface 10 and the wavelength selective switch 1 d on the output side of the UNI interface 20.

  Each wavelength selective switch used in the NNI interface 10 and the UNI interface 20 has a configuration as shown in FIG. The wavelength selective switch 1 shown in FIG. 1 includes a single demultiplexer 11, a plurality of optical switches 21 connected to the demultiplexer 11, and a plurality of multiplexers 31 connected to the optical switch 21.

The demultiplexer 11 shown in FIG. ₁ converts the wavelength multiplexed signal light consisting of n channels of λ ₁ , λ ₂ ,..., Λ _n input from the input port into n based on the wavelength editing signal from the control unit 2. The signal is demultiplexed and output to n optical switches 21. That is, the same number of optical switches as the number of wavelengths of the wavelength multiplexed signal light are required. In the example shown in the figure, wavelength multiplexed signal light composed of λ ₁ , λ ₂ ,..., Λ _{11 is} demultiplexed into 11 and output to 11 optical switches 21.

  Each optical switch 21 has one input port and M (M is the number of multiplexers) output ports, and any one of the input WDM input lights is based on a path switching signal from the control unit 2. Are switched and output to the multiplexer 31.

The multiplexer 31 combines the wavelengths input from the optical switch 21 and outputs them. In the example of FIG. 17, four multiplexers are provided, and wavelengths λ _{1 to} λ ₃ , wavelengths λ _{4 to} λ ₆ , wavelengths λ _{7 to} λ ₈ , and wavelengths λ _{9 to} λ ₁₁ are output from each output port. Is done.

  In the UNI interface 20 provided with the wavelength selective switches 1c and 1d having the same configuration as that of the NNI interface 10 described above, any wavelength light selected by the wavelength selective switch 1c on the input side is one of the NNI interfaces 10. The wavelength selective switch 1b selects the wavelength light input from the wavelength selective switch 1c of the UNI interface 20 and the wavelength light input from any one of the wavelength selective switches 1a of the NNI interface 10. Output.

The wavelength light selected by the wavelength selective switch 1a of the NNI interface 10 is output to the wavelength selective switch 1b and the wavelength selective switch 1d of the UNI interface 20.
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, since the conventional configuration uses wavelength selective switches having the same number of optical switches as the number of channels of wavelength multiplexed signal light as shown in FIG. 17, the number of wavelength selective switches increases as the number of wavelength selective switches increases. There is a problem that the number of switches also increases.

  The present invention has been made in view of the above points, and provides an optical cross-connect system capable of reducing the number of optical switches in a wavelength selective switch and reducing the cost, and a signal control method in the optical cross-connect system. With the goal.

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

The present invention (claim 1) provides an optical cross-connect device 100 and a user network interface (UNI) 200 using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength multiplexing transmission. An optical cross-connect system comprising:
The optical cross-connect device 100 includes a plurality of wavelength selective switches 110 provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side. 120, and
The UNI 200 has one or more wavelength selective switches 210 on the input side and the output side as many as the maximum optical cross-connect device,
The plurality of wavelength selective switches 110a on the input side of the optical cross-connect device 100 are:
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch 120,
The plurality of wavelength selective switches 110b on the output side of the optical cross-connect device 100 are:
Select and output each wavelength light input from the optical switch 120,
The optical switch 120 of the optical cross-connect device 100 is
Switch the wavelength light input from the input side wavelength selective switch 110a and the input side wavelength selective switch 210a of the UNI, and output to the output side wavelength selective switch 110b and the output side wavelength selective switch 210b of the UNI,
The wavelength selective switch 210a on the input side of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, and output the selected wavelength to the optical switch 120 of the optical cross-connect device 100,
The wavelength selective switch 210b on the output side of the UNI 200 is
The wavelength light output from the optical switch 120 of the optical cross-connect device 100 is selected and output.

The present invention (Claim 2) comprises an optical cross-connect device and a user network interface (UNI) using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission. Optical cross-connect system
The optical cross-connect device includes a plurality of wavelength selective switches provided in parallel on the input side and the output side, a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side, Have
UNI has one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side,
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch and the wavelength selection switch on the output side of UNI,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output the wavelength light respectively input from the optical switch and UNI wavelength selection switch,
The optical switch of the optical cross-connect device
Switch the wavelength light input from the wavelength selective switch on the input side, and output to the wavelength selective switch on the output side,
The wavelength selective switch on the input side of UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of UNI is
The wavelength light output from the wavelength selective switch on the input side of the optical cross-connect device is selected and output.

The present invention (Claim 3) provides the optical cross-connect device and the UNI wavelength selective switch according to Claim 1 or 2,
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

The present invention (Claim 4) provides the optical cross-connect device and the UNI wavelength selective switch according to Claim 1 or 2,
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 wavelength 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 last-stage band division filter uses a wavelength selective switch that outputs the wavelength light divided for each wavelength band to the outside as it is.

Further, the present invention (Claim 5) according to Claims 1 to 4,
Wavelength selective switch
Based on the wavelength editing signal to select the wavelength, select the wavelength from the wavelength multiplexed signal light,
Optical switch
The route is switched based on the route switching signal for switching the wavelength route.

The present invention (Claim 6) also provides an optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission, an active system, and the active system An optical cross-connect system composed of a redundant user network interface (UNI) that switches to a standby system when communication becomes impossible in the system,
The optical cross-connect device has a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side. And
UNI has one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side of the active and standby systems,
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch and the wavelength selection switch on the output side of UNI,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output each wavelength light input from the optical switch,
The optical switch of the optical cross-connect device
Switch the wavelength light input from the wavelength selection switch on the input side, and output to the wavelength selection switch on the output side of the active or standby system and the wavelength selection switch on the output side of the UNI,
The wavelength selective switch on the input side of the active and standby systems of UNI is
Select specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of the active and standby systems of UNI is
The wavelength light output from the optical switch of the optical cross-connect device is selected and output.

According to the present invention (Claim 7), an optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength multiplexing transmission, an active system, and an active system An optical cross-connect system composed of a redundant user network interface (UNI) that switches to a standby system when communication becomes impossible,
The optical cross-connect device includes a plurality of wavelength selective switches provided in parallel on the input side and the output side, a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side, Have
UNI has one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side of the active and standby systems,
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output each wavelength light input from the optical switch,
The optical switch of the optical cross-connect device
Switch the wavelength light input from the wavelength selection switch on the input side, and output the wavelength selection switch on the output side of the UNI or the wavelength selection switch on the output side of the UNI and the wavelength selection switch on the output side of the UNI,
The wavelength selective switch on the input side of the active and standby systems of UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of the active and standby systems of UNI is
The wavelength light output from the wavelength selection switch on the wavelength selection side on the input side of the optical cross-connect device is selected and output.

The present invention (Claim 8) is characterized in that in Claim 6 or 7,
As an optical cross-connect device and UNI wavelength selective switch,
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, the present invention (Claim 9) according to Claim 6 or 7,
As an optical cross-connect device and UNI wavelength selective switch,
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 wavelength 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 last-stage band division filter uses a wavelength selective switch that outputs the wavelength light divided for each wavelength band to the outside as it is.

Further, the present invention (Claim 10) selects a wavelength from wavelength multiplexed signal light based on a wavelength edit signal for selecting a wavelength in a wavelength selective switch,
In the optical switch, the route is switched based on a route switching signal for switching the wavelength route.

The present invention (claim 11) comprises an optical cross-connect device and a user network interface (UNI) using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength multiplexing transmission. A signal control method in an optical cross-connect system,
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side When,
In an optical cross-connect system composed of UNI having the same number of wavelength selective switches as one or more maximum optical cross-connect devices on the input side and output side,
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output each wavelength light input from the optical switch,
The optical switch of the optical cross-connect device
Switch the wavelength light input from the wavelength selective switch on the input side and the wavelength selective switch on the input side of the UNI, and output to the wavelength selective switch on the output side and the wavelength selective switch on the output side of the UNI,
The wavelength selective switch on the input side of UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of UNI is
The wavelength light output from the optical switch of the optical cross-connect device is selected and output.

The present invention (Claim 12) comprises an optical cross-connect device and a user network interface (UNI) using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission. A signal control method in an optical cross-connect system,
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side When,
UNI having one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and the output side;
In an optical cross-connect system having
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch and the wavelength selection switch on the output side of UNI,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output the wavelength light respectively input from the optical switch and UNI wavelength selection switch,
The optical switch of the optical cross-connect device
Switch the wavelength light input from the wavelength selective switch on the input side, and output to the wavelength selective switch on the output side,
The wavelength selective switch on the input side of UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of UNI is
The wavelength light output from the wavelength selective switch on the input side of the optical cross-connect device is selected and output.

According to the present invention (Claim 13), an optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength multiplexing transmission, an active system, and the active system A signal control method in an optical cross-connect system configured by a redundant user network interface (UNI) that switches to a standby system when communication becomes impossible,
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side;
UNI having at least one wavelength selective switch equal to or more than the maximum optical cross-connect device on the input side and output side of the active system and the standby system;
In an optical cross-connect system having
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output each wavelength light input from the optical switch,
The optical switch of the optical cross-connect device
Wavelength light input from the wavelength selective switch on the input side and the wavelength selective switch on the input side of the input side of the UNI or the wavelength selection switch on the input side of the UNI is switched. Output to the selection switch,
The wavelength selective switch on the input side of the active and standby systems of UNI is
Select specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of the active and standby systems of UNI is
The wavelength light output from the optical switch of the optical cross-connect device is selected and output.

According to the present invention (Claim 14), an optical cross-connect device using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission, an active system, and the active system A signal control method in an optical cross-connect system configured by a redundant user network interface (UNI) that switches to a standby system when communication becomes impossible,
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side When,
UNI having one or more wavelength selective switches and wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side of the active system and the standby system;
In an optical cross-connect system having
Multiple wavelength selective switches on the input side of the optical cross-connect device
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
Multiple wavelength selective switches on the output side of the optical cross-connect device
Select and output each wavelength light input from the optical switch,
The optical switch of the optical cross-connect device
Switch the wavelength light input from the wavelength selection switch on the input side, and output the wavelength selection switch on the output side of the UNI or the wavelength selection switch on the output side of the UNI and the wavelength selection switch on the output side of the UNI,
The wavelength selective switch on the input side of the active and standby systems of UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of the active and standby systems of UNI is
The wavelength light output from the wavelength selection switch on the wavelength selection side on the input side of the optical cross-connect device is selected and output.

  As described above, according to the present invention, an optical switch is provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side of the NNI interface without providing an optical switch inside the wavelength selective switch. The cost for the switch can be greatly reduced.

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

[First Embodiment]
In the present embodiment, a system including an NNI interface and a client UNI interface will be described.

  FIG. 2 shows the configuration of the optical cross-connect system in the first embodiment of the present invention.

  The system shown in FIG. 1 includes an NNI interface (optical cross-connect device) 100 and a UNI interface 200.

  The NNI interface 100 includes a plurality of wavelength selective switches 110a on the input side and a plurality of wavelength selective switches 110b on the output side, a plurality of optical switches 120 provided between the wavelength selective switch 110a and the wavelength selective switch 110b, and a control unit 150. Consists of

  The wavelength selective switch of the present embodiment has the wavelength selective switch shown in FIG.

  FIG. 3 shows a configuration of a wavelength selective switch used for the NNI interface according to the first embodiment of this invention.

  The wavelength selective switch 110 shown in the figure includes one duplexer 111 and n (three in FIG. 3) multiplexers 112.

The demultiplexer 111 is a 1 × N demultiplexer, and when wavelength multiplexed signal light λ ₁ , λ ₂ ,..., Λ _n is input, mapping is performed for each wavelength based on the wavelength editing signal from the control unit 150. And output to the multiplexer 112.

  The multiplexer 112 spatially recombines the wavelength axes of the wavelength light input from the duplexer 111 and outputs it from the output port for each group.

Specifically, wavelength multiplexed signal light of wavelengths λ _{1 to} λ ₁₄ is input, of which λ ₁ is a first group, λ ₂ and λ ₃ are a second group, λ ₄ and λ ₅ are a third group, and λ ₆ , Λ ₇ as a fourth group, λ ₈ and λ ₉ as a fifth group, and λ ₁₀ and λ ₁₁ as a sixth group.

When the wavelength multiplexed signal light λ _{1 to} λ ₁₄ is input from the input port of the demultiplexer 111, the demultiplexer 111 sends the wavelength light of the first group and the second group to the multiplexer 112 ₁ . the wavelength of the third group and the fourth group to the multiplexer 112 _2, and outputs the wavelength of the fifth group and group 6 to the multiplexer 112 _3.

As a result, each multiplexer 112 combines the wavelength light of each group input from the demultiplexer 111 and outputs the combined light from the output port. The first multiplexer 112 ₁ receives the first and second groups of wavelength light, the second multiplexer 112 ₂ receives the third and fourth groups of wavelength light, and the third multiplexer 112 _3. Outputs the combined wavelength light of the fifth and sixth groups.

  Thus, by adopting a configuration in which no optical switch is provided in the wavelength selective switch, the number of optical switches in the entire optical cross-connect device can be reduced.

The wavelength selection switches 110a _{1 to} 110a ₄ on the input side select the wavelength of the input wavelength multiplexed light based on the wavelength editing signal from the control unit 150 by the operation as described above, and the optical switches 120 _{1 to} 120 _3. Output to either of these.

The optical switches 120 _{1 to} 120 ₃ switch the path based on the path switching signal output from the control unit 150 with the wavelength light input from the input-side wavelength selective switch 110a or the UNI interface 200, and the output-side wavelength. The selective switches 110b _{1 to} 110b ₄ and the wavelength selective switch 210b of the UNI interface 200 are output.

The wavelength selection switches 110b _{1 to} 110b ₄ on the output side select the wavelength by the same operation as that of the wavelength selection switch 110a on the input side and output the wavelength from the output port.

  The UNI interface 200 includes input / output side wavelength selective switches 210a and 210b having the same configuration as the wavelength selective switch 110 of the NNI interface 100 described above.

  When wavelength multiplexed light is input, the wavelength selective switch 210a on the input side of the UNI interface 200 selects a wavelength based on the wavelength editing signal from the control unit 150 and outputs the wavelength to the optical switch 120 of the NNI interface 100.

  The wavelength selection switch 210b on the output side of the UNI interface 200 selects the wavelength light input from the optical switch 120 of the NNI interface 100 based on the wavelength editing signal from the control unit 150, and outputs it from the output port.

  In the above configuration, the control unit 150 of the NNI interface 100 controls the wavelength control switch of the UNI interface. However, the present invention is not limited to this example, and the control unit is also provided on the UNI interface 200 side. It is also possible for two control units to share data and cooperate with each other.

  In the above configuration, the wavelength selected from the wavelength selective switch 210a on the input side of the UNI interface 200 is output to the optical switch 120 of the NNI interface 100, and the wavelength light is input from the optical switch 120 of the NNI interface 100. Thus, the add / drop signal between the NNI interface 100 and the UNI interface 200 is passed through the optical switch 120.

[Second Embodiment]
In the present embodiment, the wavelength light of the wavelength selective switch of the UNI interface in the first embodiment is directly input to the wavelength selective switch of the NNI interface without going through the optical switch of the NNI interface.

  Hereinafter, an example in which the wavelength light of the wavelength selective switch of the UNI interface is input to the wavelength selective switch on the output side of the NNI interface will be described.

  FIG. 4 shows a configuration of an optical cross-connect system according to the second embodiment of the present invention.

  In the figure, the same components as those in FIG. The wavelength selective switches 110a, 110b, 210a, and 210b of the NNI interface 100 and the UNI interface 200 shown in the figure have the same configuration as the wavelength selective switch shown in FIG. Omitted.

  In the following, only differences from the first embodiment will be described.

  The wavelength selective switch 110 a on the input side of the NNI interface 100 selects the wavelength selected based on the wavelength editing signal of the control unit 150 from the input wavelength multiplexed light, and the wavelength selective switch 210 b on the output side of the UNI interface 200. Output to. At this time, the light is directly output to the wavelength selective switch 210b on the output side of the UNI interface 200 without passing through the optical switch 120.

  The wavelength selective switch 210 a on the input side of the UNI interface 200 selects the input wavelength multiplexed light based on the wavelength edit signal from the control unit 150 and outputs the selected wavelength multiplexed light to the wavelength selective switch 110 b on the output side of the NNI interface 100. At this time, the light is directly output to the wavelength selective switch 110b on the output side of the NNI interface 100 without passing through the optical switch 120.

  Thus, in the present embodiment, the add / drop signal between the NNI interface 100 and the UNI interface 200 is prevented from passing through the optical switch.

[Third Embodiment]
In the present embodiment, a configuration in which an add / drop signal is allowed to pass through an optical switch using a wavelength selective switch different from that in the first embodiment will be described.

  FIG. 5 shows a configuration of an optical cross-connect system according to the third embodiment of the present invention. The same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

5, the wavelength selective switch 130a ₁ ~130a ₄ on the input side of the NNI interface 100, the input side of the wavelength selective switches 230a output wavelength selective switch 130b ₁ ~130b ₄ side, UNI interface 200, the wavelength selection of the output side The switch 230b is a wavelength selective switch having the configuration shown in FIG.

  The wavelength selective switch shown in FIG. 6 has two band filters 131. In the figure, an example of a two-stage bandpass filter is shown, but the present invention is not limited to this example, and the light between the wavelength selective switch 130a on the input side and the wavelength selective switch 130b on the output side of the NNI interface 100 is not limited to this example. The number can be appropriately increased or decreased according to the number of switches 120.

When the wavelength of the n-channel multiplexed light is inputted to the band division filter 131 _first wavelength selection switch shown in FIG. 6, on the basis of the wavelength editing signal from the control unit 150, the multi-wavelength light into two for each wavelength band split, and enter one of the 2-stage band-dividing filter 131 ₂ of the other outputs from the output port. 2-stage band-dividing filter 131 ₂ divides the wavelength input from the band pass filter 131 ₁ into two, and outputs from the output port.

  As described above, the wavelength selective switch 200 is configured only by the band division filter and does not use the optical switch, so that it is not necessary to arrange the optical switches for the number of wavelength lights, and the wavelength selective switch can be downsized. be able to.

  In the wavelength selective switch 130a on the input side of the NNI interface 100 shown in FIG. 5, the wavelength divided by the band division filter 131 as described above is output from the output port to the optical switch 120. The same applies to the wavelength selective switch 130b on the output side. Similarly, the wavelength selective switch 230 a on the input side of the UNI interface 200 outputs the wavelength output from the band division filter 131 to the optical switch 120 of the NNI interface 100. The wavelength selector switch 230b on the output side selects the wavelength input from the optical switch 120 of the NNI interface 100 by the same operation, and outputs it from the output port.

[Fourth Embodiment]
In the present embodiment, a configuration in which a wavelength selective switch different from that of the second embodiment is used and an add / drop signal is not allowed to pass through the optical switch will be described.

  FIG. 7 shows a configuration of an optical cross-connect system according to the fourth embodiment of the present invention. In this figure, the same components as those in FIG.

  In FIG. 7, the difference from FIG. 4 of the second embodiment is the configuration of the wavelength selective switch. The wavelength selective switch in the present embodiment uses a wavelength selective switch that uses the band division filter shown in FIG. 6 in the third embodiment described above. The configurations of the wavelength selective switches 130a and 130b of the NNI interface 100 and the wavelength selective switches 230a and 230b of the UNI interface 200 are the same as those of the third embodiment described above, and thus the description thereof is omitted.

[Fifth Embodiment]
FIG. 8 shows a configuration of an optical cross-connect system in the fifth embodiment of the present invention. The same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  The present embodiment replaces the wavelength selective switches 110 and 210 shown in FIG. 2 of the first embodiment with wavelength selection switches of the NNI interface 100 and the UNI interface 200 as shown in FIG. This is an example using the switch 1.

  The configuration shown in FIG. 8 outputs the wavelength selected from the wavelength selective switch 1 c on the input side of the UNI interface 200 to the optical switch 120 of the NNI interface 100, and wavelength light is transmitted from the optical switch 120 of the NNI interface 100 to the UNI interface 200. By adopting a configuration that is input to the wavelength selective switch 1d on the output side, the add / drop signal is allowed to pass through the optical switch 120.

[Sixth Embodiment]
FIG. 9 shows a configuration of an optical cross-connect system according to the sixth embodiment of the present invention.

  The same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

  In this embodiment, instead of the wavelength selective switches 110 and 210 shown in FIG. 3 of the second embodiment, the wavelength selective switch shown in FIG. 17 of the prior art is used as the wavelength selective switch of the NNI interface 100 and the UNI interface 200. This is an example using the switch 1.

  In the configuration shown in FIG. 9, the wavelength selected from the wavelength selective switch 1c on the input side of the UNI interface 200 is output to the wavelength selective switch b on the output side without passing through the optical switch 120 of the NNI interface 100. Since the wavelength light selected by the wavelength selection switch 100 on the input side 100 is directly input to the wavelength selection switch 1d on the output side of the UNI interface 200 without passing through the optical switch 120, an add / drop signal is transmitted. The optical switch 120 is not allowed to pass.

[Seventh Embodiment]
In the present embodiment, an example is shown in which the configuration of the UNI interface is a redundant system composed of an active system and a standby system.

  FIG. 10 shows the configuration of an optical cross-connect system (redundant system) in the seventh embodiment of the present invention.

  The system shown in the figure includes the NNI interface 100 having the same configuration as that of the first embodiment, the wavelength selective switch 310 having the configuration of FIG. 3, and the UNI interface 300 having the control unit 350.

  Since the NNI interface 100 is the same as that of the first embodiment, its description is omitted.

  The UNI interface 300 includes a wavelength selective switch 310a on the active input side, a wavelength selective switch 310c on the active output side, a wavelength selective switch 310b on the standby input side, a wavelength selective switch 310d on the output side of the standby system, and The control unit 350 manages wavelengths and outputs wavelength editing signals to the wavelength selective switches 310a, 310b, 310c, and 310d.

  In the above configuration, when the UNI interface 300 is operating in the active system, when wavelength multiplexed light is input to the wavelength selective switch 310 a, the wavelength selective switch 310 a selects the optical switch 120 of the NNI interface 100. Output the measured wavelength. In the optical switch 120, the wavelength whose path is switched based on the path selection signal from the control unit 150 is input to the wavelength selection switch 310 c on the output side of the working system of the UNI interface 300, and the wavelength is switched by the wavelength selection switch 310 c. The selected wavelength is output from the output port.

  Further, when a failure or the like occurs in the working system of the UNI interface 300 and normal communication becomes impossible, the wavelength-multiplexed light input to the standby wavelength selective switch 310b is wavelength-selected, and the NNI interface 100 To the optical switch 120. In the optical switch 120, the wavelength whose path is switched based on the path selection signal from the control unit 150 is output to the wavelength selection switch 310 d on the output side of the standby system of the UNI interface 300.

  In the above configuration, the wavelength selection switch 310a or 310b on the input side of the working / standby system of the UNI interface 200 outputs the selected wavelength to the optical switch 120 of the NNI interface 100, and the optical switch of the NNI interface 100 Since the wavelength light from 120 is input to the wavelength selective switch 310c or 310d on the output side of the active / standby system of the UNI interface, the add / drop signal between the NNI interface 100 and the UNI interface is sent to the optical switch 120. It is to pass through.

[Eighth Embodiment]
This embodiment is different from the seventh embodiment in that an add / drop signal is not allowed to pass through the optical switch 120.

  FIG. 11 shows the configuration of an optical cross-connect system (redundant system) in the eighth embodiment of the present invention. Similarly to the seventh embodiment, the wavelength selective switches 110 and 310 of the NNI interface 100 and the UNI interface 300 shown in FIG. However, in the present embodiment, the active wavelength selective switch 310a and the standby wavelength selective switch 310b on the input side of the UNI interface 300 are directly output from the NNI interface 100 without passing through the optical switch 120 of the NNI interface 100. The selected wavelength is output to the side wavelength selective switch 110b.

  Each wavelength selective switch 110a on the input side of the NNI interface 100 outputs the selected wavelength to the optical switch 120 of the NNI interface 100, but the UNI interface 300 does not go through the optical switch 120. The selected wavelength is output directly to the wavelength selective switches 310c and 310d on the output side.

  In the above configuration, an add / drop signal between the NNI interface 100 and the UNI interface 300 is not allowed to pass through the optical switch 120.

  As described above, by adopting a completely independent configuration in which the working system and the standby system do not share the portions of the UNI interface 200 and the NNI interface 100, no influence is given to the standby system regardless of where the working system fails. .

[Ninth Embodiment]
FIG. 12 shows the configuration of an optical cross-connect system (redundant system) in the ninth embodiment of the present invention. The present embodiment is different from the seventh embodiment only in that the wavelength selective switch configured by the band division filter shown in FIG. 6 is used as the wavelength selective switch used in the NNI interface 100 and the UNI interface 300. . In this embodiment, an add / drop signal is allowed to pass through the optical switch 120 as in the seventh embodiment.

[Tenth embodiment]
FIG. 13 shows the configuration of an optical cross-connect system (redundant system) in the tenth embodiment of the present invention. This embodiment is different from the eighth embodiment only in that the wavelength selective switch configured by the band division filter shown in FIG. 6 is used as the wavelength selective switch used in the NNI interface 100 and the UNI interface 300. . In the present embodiment, as in the eighth embodiment, an add / drop signal between the NNI interface 100 and the UNI interface 300 is not allowed to pass through the optical switch 120.

[Eleventh embodiment]
FIG. 14 shows the configuration of an optical cross-connect system (redundant system) in the eleventh embodiment of the present invention. This embodiment is different from the seventh embodiment only in that the wavelength selective switch having the conventional configuration shown in FIG. 17 is used as the wavelength selective switch used for the NNI interface 100 and the UNI interface 300. In this embodiment, as in the seventh embodiment, an add / drop signal between the NNI interface 100 and the UNI interface 300 is passed through the optical switch 120.

[Twelfth embodiment]
FIG. 15 shows the configuration of an optical cross-connect system (redundant system) in the twelfth embodiment of the present invention. This embodiment is different from the eighth embodiment only in that the wavelength selective switch having the conventional configuration shown in FIG. 17 is used as the wavelength selective switch used in the NNI interface 100 and the UNI interface 300. In the present embodiment, as in the eighth embodiment, an add / drop signal between the NNI interface 100 and the UNI interface 300 is not allowed to pass through the optical switch 120.

  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 a redundant system including a client accommodation and an active system and a standby system in an optical wavelength division multiplexing system.

It is a principle block diagram of this invention. It is a block diagram of the optical cross-connect system in the 1st Embodiment of this invention. It is a block diagram of the wavelength selective switch in the 1st Embodiment of this invention. It is a block diagram of the optical cross-connect system in the 2nd Embodiment of this invention. It is a block diagram of the optical cross-connect system in the 3rd Embodiment of this invention. It is a block diagram of the wavelength selective switch in the 3rd Embodiment of this invention. It is a block diagram of the optical cross-connect system in the 4th Embodiment of this invention. It is a block diagram of the optical cross-connect system in the 5th Embodiment of this invention. It is a block diagram of the optical cross-connect system in the 6th Embodiment of this invention. It is a block diagram of the optical cross-connect system (redundancy system) in the 7th Embodiment of this invention. It is a block diagram of the optical cross-connect system (redundancy system) in the 8th Embodiment of this invention. It is a block diagram of the optical cross-connect system (redundancy system) in the 9th Embodiment of this invention. It is a block diagram of the optical cross-connect system (redundancy system) in the 10th Embodiment of this invention. It is a block diagram of the optical cross-connect system (redundancy system) in the 11th Embodiment of this invention. It is a block diagram of the optical cross-connect system (redundancy system) in the 12th Embodiment of this invention. It is a block diagram of the system which accommodates the conventional client. It is a block diagram of the conventional wavelength selective switch.

Explanation of symbols

1 Wavelength selective switch 10 NNI (Network Network Interface)
11 Demultiplexer 12 Optical switch 20 UNI (User Network Interface)
31 multiplexer 100 NNI
110 wavelength selective switch 111 duplexer 112 multiplexer 120 optical switch 130 wavelength selective switch 131 band division filter 150 control unit 200 UNI
210 Wavelength selective switch 230 Wavelength selective switch 300 UNI
310 Wavelength selection switch 350 Control unit

Claims (14)

An optical cross-connect system comprising an optical cross-connect device using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength-multiplexed signal light used for wavelength division multiplexing transmission and a user network interface (UNI) ,
The optical cross-connect device includes a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side, Have
The UNI has one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side,
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output wavelength light respectively input from the optical switch,
The optical switch of the optical cross-connect device is
Switch the wavelength light input from the input side wavelength selective switch and the input side wavelength selective switch of the UNI, and output to the output side wavelength selective switch and the output side wavelength selective switch of the UNI,
The wavelength selective switch on the input side of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of the UNI is
An optical cross-connect system that selects and outputs wavelength light output from the optical switch of the optical cross-connect device. An optical cross-connect system comprising an optical cross-connect device using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength-multiplexed signal light used for wavelength division multiplexing transmission and a user network interface (UNI) ,
The optical cross-connect device includes a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side, Have
The UNI has one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side,
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the wavelength selective switch on the output side of the optical switch and the UNI,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output the wavelength light respectively input from the optical switch and the wavelength selection switch of the UNI,
The optical switch of the optical cross-connect device is
Switch the wavelength light input from the input side wavelength selective switch, output to the output side wavelength selective switch,
The wavelength selective switch on the input side of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of the UNI is
An optical cross-connect system that selects and outputs wavelength light output from a wavelength selective switch on the input side of the optical cross-connect device. The optical cross-connect device and the UNI wavelength selective switch 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 cross-connect system according to claim 1 or 2. The optical cross-connect device and the UNI wavelength selective switch 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 cross-connect system according to claim 1, wherein the last-stage band division filter outputs the wavelength light divided for each wavelength band to the outside as it is. The wavelength selective switch is:
Based on the wavelength editing signal to select the wavelength, select the wavelength from the wavelength multiplexed signal light,
The optical switch is
The optical cross-connect system according to claim 1, wherein the path is switched based on a path switching signal for switching a wavelength path. An optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission, and a standby system when communication becomes impossible in the active system and the active system An optical cross-connect system configured with a redundant user network interface (UNI) to be switched to
The optical cross-connect device includes a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side. Have
The UNI has one or more wavelength selective switches equal to the maximum optical cross-connect device on the input side and output side of the active system and the standby system,
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output wavelength light respectively input from the optical switch,
The optical switch of the optical cross-connect device is
Wavelength light input from the wavelength selection switch on the input side and the wavelength selection switch on the input side of the input side of the UNI or on the standby side is switched, and the wavelength selection switch on the output side and the active side of the output side of the UNI or protection on the output side of the UNI Output to the wavelength selective switch of the system,
The wavelength selection switch on the input side of the working and standby systems of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of the working and standby systems of the UNI is
An optical cross-connect system that selects and outputs wavelength light output from the optical switch of the optical cross-connect device. An optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission, and a standby system when communication becomes impossible in the active system and the active system An optical cross-connect system configured with a redundant user network interface (UNI) to be switched to
The optical cross-connect device includes a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side, Have
The UNI has one or more wavelength selective switches and wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side of the active system and the standby system,
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output wavelength light respectively input from the optical switch,
The optical switch of the optical cross-connect device is
Switch the wavelength light input from the wavelength selective switch on the input side, and output to the wavelength selective switch on the output side of the UNI or the wavelength selective switch on the output side of the UNI and the wavelength selective switch on the output side of the UNI,
The wavelength selection switch on the input side of the working and standby systems of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of the working and standby systems of the UNI is
An optical cross-connect system that selects and outputs wavelength light output from a wavelength selective switch on a wavelength selection side on the input side of the optical cross-connect device. The optical cross-connect device and the UNI wavelength selective switch 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 cross-connect system according to claim 6 or 7. The optical cross-connect device and the UNI wavelength selective switch 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 cross-connect system according to claim 6 or 7, wherein the last-stage band division filter outputs the wavelength light divided for each wavelength band as it is. The wavelength selective switch is:
Based on the wavelength editing signal to select the wavelength, select the wavelength from the wavelength multiplexed signal light,
The optical switch is
The optical cross-connect system according to any one of claims 6 to 9, wherein the path is switched based on a path switching signal for switching a wavelength path. Signal control in an optical cross-connect system composed of an optical cross-connect device and a user network interface (UNI) using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission A method,
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side When,
In an optical cross-connect system composed of UNI having the same number of wavelength selective switches as one or more maximum optical cross-connect devices on the input side and output side,
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output wavelength light respectively input from the optical switch,
The optical switch of the optical cross-connect device is
Switch the wavelength light input from the input side wavelength selective switch and the input side wavelength selective switch of the UNI, and output to the output side wavelength selective switch and the output side wavelength selective switch of the UNI,
The wavelength selective switch on the input side of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of the UNI is
A signal control method in an optical cross-connect system, wherein the wavelength light output from the optical switch of the optical cross-connect device is selected and output. Signal control in an optical cross-connect system composed of an optical cross-connect device and a user network interface (UNI) using a wavelength selective switch for selecting and extracting a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission A method,
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side When,
UNI having one or more wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and the output side;
In an optical cross-connect system having
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the wavelength selective switch on the output side of the optical switch and the UNI,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output the wavelength light respectively input from the optical switch and the wavelength selection switch of the UNI,
The optical switch of the optical cross-connect device is
Switch the wavelength light input from the input side wavelength selective switch, output to the output side wavelength selective switch,
The wavelength selective switch on the input side of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of the UNI is
A signal control method in an optical cross-connect system, wherein wavelength light output from the wavelength selective switch on the input side of the optical cross-connect device is selected and output. An optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission, and a standby system when communication becomes impossible in the active system and the active system A signal control method in an optical cross-connect system configured by a redundant user network interface (UNI) to be switched to
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side;
UNI having at least one wavelength selective switch equal to or more than the maximum optical cross-connect device on the input side and output side of the active system and the standby system;
In an optical cross-connect system having
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output wavelength light respectively input from the optical switch,
The optical switch of the optical cross-connect device is
Wavelength light input from the wavelength selection switch on the input side and the wavelength selection switch on the input side of the input side of the UNI or on the standby side is switched, and the wavelength selection switch on the output side and the active side of the output side of the UNI or protection on the output side of the UNI Output to the wavelength selective switch of the system,
The wavelength selection switch on the input side of the working and standby systems of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the optical switch of the optical cross-connect device,
The wavelength selective switch on the output side of the working and standby systems of the UNI is
A signal control method in an optical cross-connect system, wherein the wavelength light output from the optical switch of the optical cross-connect device is selected and output. An optical cross-connect device using a wavelength selective switch that selects and extracts a signal of a specific wavelength from wavelength multiplexed signal light used for wavelength division multiplexing transmission, and a standby system when communication becomes impossible in the active system and the active system A signal control method in an optical cross-connect system configured by a redundant user network interface (UNI) to be switched to
An optical cross-connect device having a plurality of wavelength selective switches provided in parallel on the input side and the output side, and a plurality of optical switches provided between the wavelength selective switch on the input side and the wavelength selective switch on the output side When,
UNI having one or more wavelength selective switches and wavelength selective switches equal to or more than the maximum optical cross-connect device on the input side and output side of the active system and the standby system;
In an optical cross-connect system having
A plurality of wavelength selective switches on the input side of the optical cross-connect device,
Select a specific wavelength light from the wavelength multiplexed signal light input to each, and output the selected wavelength to the optical switch,
A plurality of wavelength selective switches on the output side of the optical cross-connect device,
Select and output wavelength light respectively input from the optical switch,
The optical switch of the optical cross-connect device is
Switch the wavelength light input from the wavelength selective switch on the input side, and output to the wavelength selective switch on the output side of the UNI or the wavelength selective switch on the output side of the UNI and the wavelength selective switch on the output side of the UNI,
The wavelength selection switch on the input side of the working and standby systems of the UNI is
Select a specific wavelength light from the input wavelength multiplexed signal light, output the selected wavelength to the wavelength selective switch on the output side of the optical cross-connect device,
The wavelength selective switch on the output side of the working and standby systems of the UNI is
A signal control method in an optical cross-connect system, wherein wavelength light output from a wavelength selective switch on a wavelength selection side on the input side of the optical cross-connect device is selected and output.

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