JP4166711B2 - OPTICAL COMMUNICATION NETWORK SYSTEM AND OPTICAL COMMUNICATION INTERFACE DEVICE - Google Patents

Description

  The present invention provides an optical communication network system system that provides a large-capacity communication line by providing a large number of optical paths between a plurality of communication node devices, and an optical communication interface device that connects a plurality of communication node devices through an optical path. It is about.

As a method for providing a large-capacity communication line by providing a large number of optical paths between a plurality of communication node devices, there is a method using a wavelength division multiplexing (WDM) communication device as shown in FIG. In FIG. 11, 1001 is a communication node device, 1002 is a WDM communication device, and 1003 is an optical fiber.
The communication node device 1001 is connected to one or a plurality of WDM communication devices 1002, and is connected to another WDM device 1002 and communication node device 1001 via an optical fiber 1003.
Therefore, by using the WDM communication apparatus 1002, communication between the communication nodes can be provided between a maximum of the same number of transmission / reception ports as the number of wavelengths handled by the WDM communication apparatus.

However, in such a method using a WDM communication apparatus, a signal transmitted from an arbitrary communication node apparatus is always received by an adjacent communication node apparatus, and the destination of the signal is analyzed by the adjacent communication node apparatus.
Then, signals other than signals to be received by the adjacent communication node device need to be transferred to an appropriate output port. This transfer process has a problem that a transmission delay occurs and a calculation resource required for the transfer process increases.
In order to avoid such a problem, there is a method in which an optical cross connect (OXC) device is used as shown in FIG. 12, and a communication node device that is not a reception destination is bypassed to provide a signal transmission path.

In FIG. 12, reference numeral 1004 denotes an OXC apparatus. The communication node device 1001 is connected to an OXC device 1004. The OXC device 1004 is connected to one or a plurality of WDM communication devices 1002, and another WDM communication device 1002 or OXC device is connected via an optical fiber 1003. 1004 is connected.
The OXC device is a device that can change the connection relationship between input and output ports as necessary, and connects between the communication node device 1001 and the WDM communication device 1002 or between two different WDM communication devices 1002. Can be drunk.

Since the OXC device 1004 has a function for connecting two different WDM communication devices 1002, a signal that the communication node device 1001 does not need to receive can be transferred without going through the communication node device 1001. Since the calculation resource of the node device 1001 is not used and the calculation of the transfer process is not performed, the transfer is performed with a small transmission delay.
Furthermore, since the OXC device 1004 can change the connection relationship between the input and output ports, the setting of a route that bypasses the communication node device 1001 can be changed to an optimum form according to the traffic flowing through the network.

Next, FIG. 13 is an example of a configuration method for obtaining an OXC apparatus and a WDM communication apparatus (see, for example, Non-Patent Document 1). In FIG. 13, 1101-1, 1101-2, and 1101-N are input optical fibers, 1102-1, 1102-2, and 1102-N are output optical fibers, and 1103-1, 1103-2, and 1103-N are optical components. Reference numerals 1104-1, 1104-2, and 1104-m denote optical matrix switches, and 1105-1, 1105-2, and 1105-N denote optical multiplexing circuits.
In the OXC apparatus, the input optical fibers 1101-1 to 1101-N are wavelength-multiplexed with m-wavelength optical signals, which are input to the optical demultiplexing circuits 1103-1 to 1103-N, and are separated for each wavelength. Separated into paths.

The separated optical signals are input to different optical matrix switches 1104-1 to 1104-m for each wavelength, and the desired output fiber 1102-1 is provided under the condition that signals of the same wavelength are not output from the same output fiber. The path is switched so that it is output to ~ 1102-N.
The optical multiplexing circuits 1105-1 to 1105-N have m input ports connected to separate matrix switches 1104-1 to 1104-m, respectively, and wavelength-multiplex the input optical signals of m wavelengths. And output from the output optical fibers 1102-1 to 1102-N.
By using such an OXC device, a path that bypasses the communication node device can be provided.
R. Ramaswami, KN Sivarajan, Optical Networks, pp. 341, Morgan Kaufmann Publishers, Inc., 1998

However, when an OXC device is used to bypass the communication node device, there is a problem that the types and the number of components to be configured are increased and the cost for realizing it is higher than that in the case of using a WDM communication device. there were.
The present invention has been made in view of the drawbacks of a method for providing a path for bypassing a communication node device using the OXC device as described above, and bypasses the communication node device as compared with the case where only the WDM communication device is used. By providing a re-changeable route, it is possible to reduce the load on the transfer processing of the communication node device, while reducing the types and the number of necessary components compared to the case of using the OXC device, which is low. It is to realize a high-performance network at a low cost.

  That is, according to the present invention, each communication node device is provided with an arrayed waveguide diffraction grating and a wavelength converter that outputs signal light at a desired wavelength, so that the communication node device can be configured with a small number of components without using an OXC device. Provided are an optical communication network system and an optical communication interface device that can provide an optical path to be bypassed and can change the optical path according to the situation.

  The optical communication network system according to the present invention is an optical communication network system in which an interface device for optical communication is connected to each communication node device, and the interface devices for optical communication are connected by optical fibers. Interface has a (2N + M) input (2N + M) output arrayed waveguide grating (N and M are integers), and the 2N + mth (1 ≦ m ≦ M) output of the arrayed waveguide grating The port and the input port are connected to the 2N + mth input port and the output port of an arrayed waveguide grating (AWG) included in another interface device for optical communication, and the array waveguide diffraction grating Wavelength conversion device that converts input signal light into a desired wavelength and outputs it to the first to 2Nth input ports And is connected to the (2n-1) th input port with respect to the 2n-1st and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating. The output light from the 2n-1st output port is input to the wavelength converter, and the output light of the 2nth output port is input to the wavelength converter connected to the 2nth input port, or The signal light is input from the first transmission port of the communication node device to the wavelength conversion device connected to the 2n-1th input port, and the 2nth signal is input to the first reception port of the communication node device. Signal light is input from the output port, and simultaneously, signal light from the second transmission port of the communication node device is input to the wavelength converter connected to the 2n-th input port, and the second of the communication node device of A signal port, the signal light from the 2n-1 th output port is characterized in that it is entered.

  In the optical communication network system of the present invention, the output light of the 2n-1st output port is output from the 2n-1st and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating. , Connected to the input port of the first 1-input 2-output optical switch, the first output port of the first 1-input 2-output optical switch is connected to the second receiving port of the communication node device, A second input port of the first two-input one-output optical switch is connected to a first input port of the first two-input one-output optical switch, and is connected to a second input port of the first two-input one-output optical switch. The first transmission port of the communication node device is connected, the output port of the first two-input one-output optical switch is connected to the wavelength conversion device connected to the 2n-1th input port, and the 2nth The output light of the output port 2 is connected to the input port of the 1-input 2-output optical switch, the first output port of the second 1-input 2-output optical switch is connected to the first receiving port of the communication node device, and the second 1-input The second output port of the two-output optical switch is connected to the first input port of the second two-input one-output optical switch, and the communication node is connected to the second input port of the second two-input one-output optical switch. A second transmission port of the device is connected, an output port of the second 2-input 1-output optical switch is connected to a wavelength converter connected to the 2n-th input port, and the first and second 1-inputs The two-output optical switch and the first and second two-input one-output optical switches are linked in input / output relationship, and the signal light input by the first-input / two-output optical switch is output to the first output port. 2 input 1 output light when When the switch outputs the signal light input to the second input port to the output port, while the 1-input 2-output optical switch outputs the input signal light to the second output port, the 2 The input 1 output optical switch outputs the signal light input to the first input port to the output port.

  In the optical communication network system of the present invention, the output light of the 2n-1st output port is output from the 2n-1st and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating. A first input port of the first two-input two-output optical switch, a first output port of the first two-input two-output optical switch is connected to a second reception port of the communication node device; The second input port of the first 2-input 2-output optical switch is connected to the first transmission port of the communication node device, and the second output port of the first 2-input 2-output optical switch is 2n-1th. The output light of the 2n-th output port is connected to the first input port of the second 2-input 2-output optical switch, and the second 2 The first output of the input 2 output optical switch The port is connected to the first receiving port of the communication node device, the second input port of the second 2-input 2-output optical switch is connected to the second transmission port of the communication node device, and the second 2 The second output port of the input 2-output optical switch is connected to a wavelength converter connected to the 2n-th input port, and the first and second 2-input 2-output optical switches have the same input / output When the first and second 2-input 2-output optical switches are outputting the signal light input to the first input port to the first output port, they are input to the second input port. When the signal light input to the second output port is output to the second output port, the signal light input to the second input port is output to the second output port. Is output to the first output port.

  The optical communication network system of the present invention is characterized in that, in the optical communication network system, the arrayed waveguide diffraction grating has a wavelength circulation property.

  The optical communication network system of the present invention is replaced with an arrayed waveguide grating (N and M are integers) of (2N + M) input (2N + M) output, and an arrayed waveguide grating of 2N input M output and an array of M input 2N output. An n-th input port (n is an integer of 1 to 2N) in a 2N input M output array waveguide diffraction grating having a (2N + M) input (2N + M) output in an array waveguide diffraction grating having a waveguide diffraction grating Assuming the nth input port, the mth output port (m is an integer from 1 to M) in the 2N input M output array waveguide diffraction grating in the (2N + M) input (2N + M) output array waveguide diffraction grating. Considering the 2N + mth output port, the mth input port in the M-input 2N-output arrayed waveguide grating is the (2N + M) input (2N + M) output array. Assuming that the 2N + mth input port in the waveguide grating is the nth output port in the (2N + M) input (2N + M) output arrayed waveguide grating, the nth output port in the Minput 2N output arrayed waveguide grating It is characterized by being connected to other components.

  An interface device for optical communication according to the present invention is an interface device for optical communication that connects each communication node device in an optical communication network system via an optical fiber, and is an array conductor of (2N + M) input (2N + M) output. It has a waveguide diffraction grating (N and M are integers), and the 2N + m-th (integer of 1 ≦ m ≦ M) output port and input port of the arrayed waveguide grating have other optical communication interface devices. It is connected to the 2N + mth input port and output port of the arrayed waveguide grating, and converts the signal light input to the first to 2Nth input ports of the arrayed waveguide grating into a desired wavelength. Output wavelength converter, and the 2n-1 and 2nth (integer of 1 ≦ n ≦ N) input ports and output ports of the arrayed waveguide grating. The wavelength conversion device connected to the 2n-1th input port receives the output light from the 2n-1st output port, and the wavelength conversion device connected to the 2nth input port The output light of the 2n-th output port is input, or the signal light is input from the first transmission port of the communication node device to the wavelength converter connected to the 2n-1th input port, The signal light is input from the 2nth output port to the first reception port of the communication node device, and the second transmission port of the communication node device is connected to the wavelength converter connected to the 2nth input port at the same time. The signal light from the 2n-1st output port is input to the second reception port of the communication node device.

  In the interface device for optical communication according to the present invention, the output light of the (2n-1) th output port is connected to the input port of the first 1-input 2-output optical switch. A first output port is connected to a second reception port of the communication node device, and a second output port of the first one-input two-output optical switch is a first input of the first two-input one-output optical switch A first transmission port of the communication node device is connected to a second input port of the first two-input one-output optical switch, and an output port of the first two-input one-output optical switch is 2n-1 connected to the wavelength converter connected to the 1st input port, the output light of the 2nth output port is connected to the input port of the second 1-input 2-output optical switch, and the second 1-input 1st output port of 2 output optical switch Is connected to the first receiving port of the communication node device, the second output port of the second 1-input 2-output optical switch is connected to the first input port of the second 2-input 1-output optical switch, The second transmission port of the communication node device is connected to the second input port of the second 2-input 1-output optical switch, and the output port of the second 2-input 1-output optical switch is connected to the 2n-th input port. The first and second one-input two-output optical switches and the first and second two-input one-output optical switches connected to the connected wavelength converters are linked in an input / output relationship, When the signal light input by the 1-input 2-output optical switch is output to the first output port, the 2-input 1-output optical switch outputs the signal light input to the second input port to the output port. On the other hand, the 1-input 2-output optical switch There When outputting signal light inputted to the second output port, and outputs the two inputs and one output optical switch signal light input to the first input port to the output port.

  The interface device for optical communication according to the present invention has an output from the 2n-1st output port at the 2n-1st and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating. The light is connected to the first input port of the first 2-input 2-output optical switch, and the first output port of the first 2-input 2-output optical switch is connected to the second reception port of the communication node device. The second input port of the first 2-input 2-output optical switch is connected to the first transmission port of the communication node device, and the second output port of the first 2-input 2-output optical switch is 2n−. The output light from the 2n-th output port is connected to the first input port of the second 2-input 2-output optical switch, and is connected to the wavelength converter connected to the first input port. The first of the 2-input 2-output optical switch The second input port of the second 2-input 2-output optical switch is connected to the second transmission port of the communication node device, and the second input port is connected to the first reception port of the communication node device. The second output port of the 2-input 2-output optical switch is connected to a wavelength converter connected to the 2n-th input port, and the first and second 2-input 2-output optical switches are connected to the same input port. When the first and second 2-input 2-output optical switches are in an output relationship and output the signal light input to the first input port to the first output port, they are input to the second input port. When the signal light input to the second output port is output to the second output port, and the signal light input to the first input port is output to the second output port, the signal input to the second input port The light is output to the first output port.

  The interface device for optical communication according to the present invention is characterized in that, in the optical communication network system, the arrayed waveguide diffraction grating has a wavelength circulation property.

  The interface device for optical communication of the present invention is replaced with an array waveguide diffraction grating (N and M are integers) of (2N + M) input (2N + M) output, and an array waveguide diffraction grating of 2N input M output and M input 2N output. N-th input port (n is an integer from 1 to 2N) in a 2N input M output array waveguide diffraction grating, and (2N + M) input (2N + M) output array waveguide diffraction Considering the nth input port in the grating, the mth output port (m is an integer from 1 to M) in the 2N input M output arrayed waveguide diffraction grating is the (2N + M) input (2N + M) output arrayed waveguide diffraction. Considering the 2N + m-th output port in the grating, the m-th input port in the M-input 2N-output arrayed waveguide grating is the (2N + M) input (2N + M) -output input. It is assumed that the 2N + m-th input port in the waveguide diffraction grating and the n-th output port in the M-input 2N-output array waveguide diffraction grating is the n-th output in the (2N + M) -input (2N + M) -output array waveguide diffraction grating. It is characterized by being connected to other components as a port.

  As described above, according to the present invention, with respect to an optical communication network system system that provides a large-capacity communication line by providing a large number of optical paths between a plurality of communication node devices, each communication node device has an arrayed waveguide diffraction pattern. By providing a grating and a wavelength converter that outputs signal light at the desired wavelength, an optical path that bypasses the communication node device can be set and the load on the transfer processing of the communication node device can be reduced. Therefore, it is possible to realize a high-performance network that can be changed according to the situation, that is, an optical signal transmission efficiency improvement without using an optical cross-connect device and at a low cost with a small number of components.

Hereinafter, an optical communication network system and an optical communication interface apparatus according to an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a block diagram showing a configuration example of the first embodiment, and shows a structure of each communication node device and an interface device for optical communication in the optical communication network system of the present invention.
The first embodiment corresponds to the invention described in claim 1. In the (2N + M) input (2N + M) output arrayed waveguide grating (101) constituting the interface device for optical communication, this corresponds to, for example, N = 2 and M = 2, and wavelength conversion is performed at the input port. The number of ports to which the device is connected is 2N, that is, 4 and the number of ports used for connection with another optical communication interface is M, that is, 2 is shown. The number of ports to which wavelength converters are connected and the number of optical communication interface ports used to connect different optical communication interfaces are not limited.

That is, M ports for both input and output of the arrayed waveguide grating are connected to any one of the (2N + M) ports of the arrayed waveguide grating included in another optical communication interface device. A bypass path is formed.
In FIG. 1, 101 is a 6-input 6-output arrayed waveguide grating with N = 2 and M = 2 at the (2N + M) input (2N + M) output, and 102-a (a is 1 or more and 4 or less) (Integer) is a wavelength conversion device, 103-1 and 103-2 are transmission ports of a communication node device constituting a network via an optical communication interface, and 104-1 and 104-2 are optical communication interfaces. It is a reception port of a communication node device that constitutes a network via the network.
The 6-input 6-output arrayed waveguide grating 101 constituting the interface device for optical communication is input to the first to fourth input ports from the first to the 2Nth, that is, N = 2. Are respectively connected to wavelength converters 102-1, 102-2, 102-3, and 102-4 that convert the signal into a desired wavelength and output it.

The 5th (2N + mth, m = 1) input port and output port of the 6-input 6-output arrayed waveguide grating 101 are 6-input 6-output arrayed waveguides constituting another interface device for optical communication. The diffraction grating is connected to the fifth output port (Port 5 on the right side in the figure) and the input port (Port 5 on the left side in the figure).
Similarly, the 6th (2N + mth, m = 2) input port and output port of the 6-input 6-output arrayed waveguide grating 101 are 6-input 6-outputs constituting another interface device for optical communication. It is connected to the sixth output port (Port 6 on the right side in the figure) and the input port (Port 6 on the left side in the figure) of the arrayed waveguide grating. The 6-input 6-output arrayed waveguide grating to which the fifth input / output port and the sixth input / output port are connected may be the same or different.

The first to fourth input / output ports of the 6-input 6-output arrayed waveguide grating are 2n-1 and 2nth (n is an integer existing in the range of 1 ≦ n ≦ N). As a set,
The wavelength converter 102- (2n-1) connected to the (n-1) th input port receives the output light of the 2n-1st output port, and is connected to the 2nth input port. The output light of the 2n-th output port is input to the conversion device 102-2n.

Alternatively, the first to fourth input / output ports of the 6-input 6-output arrayed waveguide grating are connected to the 2n-1th input port in the wavelength converter 102- (2n-1), Signal light is input from the first transmission port 103-x (x is an integer) of the communication node device, and the signal is input from the 2nth output port to the first reception port 104-x of the communication node device. At the same time, the wavelength converter 102-2n connected to the 2n-th input port receives signal light from the second transmission port 103-y (y is an integer different from x) of the communication node device. Signals are input from the (2n-1) th output port to the second reception port 104-y of the communication node device.
The first to fourth input / output ports (input and output ports, Port 1 to Port 4 in FIG. 1) of the 6-input 6-output arrayed waveguide grating are configured in any of the above-described connection configurations. .

In the connection method shown as the configuration example in FIG. 1, n = 2, that is, the wavelength conversion device 102-3 connected to the third input port with respect to the third and fourth input / output ports. Shows the case where the output light of the third output port is inputted, and the output light of the fourth output port is inputted to the wavelength converter 102-4 connected to the fourth input port. Has been.
On the other hand, for n = 1, that is, for the first and second input / output ports, the wavelength conversion device 102-1 connected to the first input port is connected to the first transmission port 103-1 of the communication node device. The wavelength converter 102-2 is connected to the second input port and the signal is input from the second output port to the first reception port 104-1 of the communication node device. The signal light is input from the second transmission port 103-2 of the communication node device, and the signal is input from the first output port to the second reception port 104-2 of the communication node device. The case is shown.

FIG. 2 shows a table showing the relationship between the input port number, the output port number, and the wavelength of the input optical signal of the arrayed waveguide grating in the first embodiment.
Based on the input / output characteristics described in this table, that is, when a signal of wavelength λ (a + b−1) is input to the a-th input port, it is output to the b-th output port. An optical path is provided.

Next, a first method for providing an optical path between different communication node devices in the first embodiment will be described with reference to FIG.
In FIG. 3, 201-1 and 201-2 are 6-input 6-output arrayed waveguide gratings, 202-1-1 and 202-2-2 are wavelength converters, and 203-1 and 203-2. Is a transmission port of the communication node device, and 204-1 and 204-2 are reception ports of the communication node device. Here, the arrayed waveguide grating 201-1 and the arrayed waveguide grating 201-2 are connected between the fifth ports.
The signal transmitted from the transmission port 203-1 in the first communication node device is a wavelength conversion device connected to the first input port of the first 6-input 6-output arrayed waveguide grating 201-1 It is input to 202-1-1.

In the wavelength converter 202-1-1, based on the input / output characteristics of the 6-input 6-output arrayed waveguide diffraction grating 201-1, the desired output port, that is, the fifth output port in FIG. The wavelength of the input signal is converted so that it is output.
As a result, the arrayed waveguide diffraction grating 201-1 outputs the signal input from the wavelength converter 202-1-1 from the fifth output port, and the second 6-input 6-output arrayed waveguide diffraction. Transmit to the fifth input port of the grid 201-2.

Here, in the first 6-input 6-output arrayed waveguide diffraction grating 201-1, the optical signals input to the A-th input port and output from the B-th output port are (A and B are 1 to 6). The following integer), because of the symmetry of the input / output characteristics of the arrayed waveguide grating, when it is input to the Bth input port, it is output from the Ath output port.
For this reason, the optical signal input to the fifth input port of the 6-input 6-output arrayed waveguide grating 201-2 is output from the first output port, and is the reception port in the second communication node device. Received at 204-2.
On the other hand, the signal transmitted from the transmission port 203-1 paired with the reception port 204-2 is connected to the second port of the second 6-input 6-output arrayed waveguide grating 201-2. This is input to the wavelength converter 202-2-2.

In the wavelength converter 202-2-2, a desired output port, that is, FIG. 3, based on the input / output characteristics (see the table of FIG. 2) of the 6-input 6-output arrayed waveguide grating 201-2. In, the wavelength of the input signal is converted so as to be output from the fifth output port.
Next, the signal output from the wavelength converter 202-2-2 is output from the fifth output port of the 6-input 6-output arrayed waveguide grating 201-2, and the first 6-input 6-output is output. Are input to the fifth input port of the arrayed waveguide grating 201-1.

As a result, the optical signal input to the fifth input port of the 6-input 6-output arrayed waveguide grating 201-1 is output from the second output port and forms a pair with the transmission port 203-1. The data is received at the reception port 204-1.
As described above, an optical path can be provided between adjacent communication node devices.
Here, if the output wavelength of the wavelength conversion device 202 is changed and signals are output from different ports of the 6-input 6-output arrayed waveguide diffraction grating 201, an optical path is provided between different communication node devices. Can do.

Next, a second method for providing an optical path between different communication node devices in the first embodiment will be described with reference to FIG.
In FIG. 4, reference numerals 201-1, 201-2, and 201-3 denote 6-input 6-output arrayed waveguide diffraction gratings (the configuration of input and output ports is the same as that of the arrayed waveguide diffraction grating 101). Reference numerals 1, 202-2-1, 202-2-2, and 202-3-2 are wavelength conversion apparatuses, 203-1 and 203-2 are transmission ports of communication node apparatuses, and 204-1 and 204-2. Is a reception port of the communication node device.
Here, the arrayed waveguide diffraction gratings 201-1 and 201-2 are connected between the fifth ports, and the arrayed waveguide diffraction gratings 201-2 and 201-3 are connected between the sixth ports. .
In the relay arrayed waveguide diffraction grating 201-2, the output signals of Ports 1 and 2 are input to the wavelength converters 202-2-1 and 202-2-2, respectively.

The signal transmitted from the transmission port 203-1 in the first communication node device is a wavelength conversion device 202 connected to the first port of the first 6-input 6-output arrayed waveguide grating 201-1. -1-1.
In the wavelength converter 202-1-1, output from a desired output port, that is, the fifth output port in FIG. 4, based on the input / output characteristics of the 6-input 6-output arrayed waveguide diffraction grating 201-1. The wavelength of the input signal is converted.
The signal output from the wavelength converter 202-1-1 is output from the fifth output port of the 6-input 6-output arrayed waveguide diffraction grating 201-1, and the second 6-input 6-output arrayed waveguide. It is input to the fifth input port of the diffraction grating 201-2.

The 6-input 6-output arrayed waveguide grating 201-2 outputs the optical signal input to the fifth input port from the first output port, and the second 6-input 6-output arrayed waveguide. It transmits to the wavelength converter 202-2-1 connected to the first port of the diffraction grating 201-2.
Next, in the wavelength converter 202-2-1, based on the input / output characteristics of the 6-input 6-output arrayed waveguide grating 201-1, the desired output port, that is, the sixth output in FIG. The wavelength of the input signal is converted so that it is output from the port.

Then, the signal output from the wavelength converter 202-2-1 is output from the sixth output port of the 6-input 6-output arrayed waveguide grating 201-2, and the third 6-input 6-output array. The signal is input to the sixth input port of the waveguide diffraction grating 201-3.
Next, the optical signal input to the sixth input port of the 6-input 6-output arrayed waveguide grating 201-3 is output from the first output port, and is received by the reception port 204 in the third communication node device. -2.

Here, the signal transmitted from the transmission port 203-1 paired with the reception port 204-2 is connected to the second port of the third 6-input 6-output arrayed waveguide grating 201-3. Is input to the wavelength converter 202-3-2.
On the other hand, in the wavelength converter 202-3-2, the output from the desired output port, that is, the sixth output port in FIG. 4 is performed based on the input / output characteristics of the 6-input 6-output arrayed waveguide grating 201-3. The wavelength of the input signal is converted.

Thereby, the signal output from the wavelength converter 202-3-2 is output from the sixth output port of the 6-input 6-output arrayed waveguide grating 201-3, and the second 6-input 6-output signal is output. This is input to the sixth input port of the arrayed waveguide grating 201-2.
The optical signal input to the sixth input port of the 6-input 6-output arrayed waveguide grating 201-2 is output from the second output port, and the second 6-input 6-output arrayed waveguide grating 201. -2 is input to the wavelength conversion device 202-2-2 connected to the first port.

In the wavelength converter 202-2-2, based on the input / output characteristics of the 6-input 6-output arrayed waveguide grating 201-2, the desired output port, that is, the fifth output port in FIG. The wavelength of the input signal is converted so that it is output.
As a result, the signal output from the wavelength converter 202-2-2 is output from the fifth output port of the 6-input 6-output arrayed waveguide grating 201-2, and the first 6-input 6-output signal is output. The signal is input to the fifth input port of the arrayed waveguide grating 201-1.

The optical signal input to the fifth input port of the 6-input 6-output arrayed waveguide diffraction grating 201-1 is output from the second output port and is paired with the transmission port 203-1. 1 is received.
As described above, an optical path can be provided between communication node devices that are not adjacent to each other.
Here, in the arrayed waveguide diffraction grating 201-2, the output port is directly connected to the wavelength converter, so that in the second communication node device connected to the arrayed waveguide diffraction grating 201-2, the signal is transmitted. The function of bypassing the second communication node device is realized without performing transmission / reception.

The output wavelength of each of the wavelength converters 202-1-1, 202-2-1, 202-2-2, 202-3-2 is changed, and the 6-input 6-output arrayed waveguide grating 201 is different. If a signal is output from the port, an optical path can be provided between different communication node devices.
By the way, depending on the input / output characteristics of the arrayed waveguide grating, the optical signals input from the 2n-1 and 2nth (n is an integer of 1 to N) input signals are treated as another set. Since the diffraction grating always outputs from the 2n−1 and 2nth output ports, the signal does not interfere with different n input / output ports.

For this reason, the optical path formed between the 2n-1st and 2nth input / output ports of the arrayed waveguide diffraction grating can be managed individually for all n. At this time, the output wavelength of the wavelength conversion device may be set so that two or more signals are not input to the same wavelength conversion device or the same reception port.
Under this condition, by arbitrarily selecting the wavelength output by the wavelength conversion device, a network that can change the optical path connecting the communication node devices is formed while having a function of bypassing the communication node device on the way. be able to.

Next, a method for managing the optical communication network system of the present invention will be described.
FIG. 14 shows the configuration of a control system that performs the control of the first embodiment. In FIG. 14, reference numerals 11-1 to 11-6 are transmission / reception device control devices, 13 is a connection relationship management server, 14 is a communication line (network), 202-1-1 to 202-1-4, 202-2-1 to 202-2-4, 202-3-1 to 202-3-4, 202-4-1 to 202-4-4, 202-5-1 to 202-5-4, 202- Reference numerals 6-1 to 202-6-4 denote wavelength converters, and 201-1 to 201-6 denote 6-input 6-output arrayed waveguide gratings.

The transmission / reception device control devices 11-1 to 11-6 are respectively connected to the wavelength conversion devices 202-1-1 to 202-1-4 via the communication line 14, respectively. 202-2-3-1 to 202-3-4, 202-1-4-1 to 202-4-4, 202-5-1 to 202-5-4, 202-6-1 202-6-4 is connected to each of them, and transmits an output wavelength control signal and an output on / off control signal to each wavelength conversion device to control the wavelength conversion device.
The control signal for each wavelength converter is generated by each of the transmission / reception device control devices 11-1 to 11-6 based on another control signal sent from the connection relationship management server 13.

Then, the connection relationship management server 13 manages the connection relationship of each of the arrayed waveguide gratings 201-1 to 201-6, as will be described later.
For this purpose, the connection relationship management server 13 is connected to the transmission / reception control devices 11-1 to 11-3 via the communication line 14, and transmits and receives control signals.
FIG. 15 shows the internal configuration of the connection relationship management server 13. The connection relationship management server 13 mainly includes a processor unit 3010, a storage medium 3030, and a control signal input / output interface 3020. In the first embodiment, a memory is used for the configuration of the storage medium 3030, but any storage medium that can read and write information can be used.

The connection relationship management server 13 includes a database that holds connection relationships of optical fibers connecting the arrayed waveguide diffraction gratings, a database that holds input / output characteristics of the arrayed waveguide diffraction gratings, and each array in the table shown in FIG. Connected to the database that holds the output wavelength, output on / off status, and input signal of the wavelength converter connected to the waveguide diffraction grating, and the database that holds the wavelength converter used in the set path. The storage medium 3030 is a storage device.
In particular, the output wavelength of each wavelength conversion device and the ON / OFF state of the output are created by collecting the wavelength conversion devices connected to the same numbered input ports of each arrayed waveguide grating and creating a separate database as described above. Hold.

Then, in the connection relation management server 13, which wavelength converter connected to each arrayed waveguide diffraction grating is to be controlled when a path between each communication node device is added or opened based on these databases. This is determined by the processor unit 3010 of the connection relationship management server 13.
As a result of the above determination, a control signal is transmitted to the transmission / reception device control devices 11-1 to 11-6 via the control signal input / output interface 3020, and the wavelength conversion device is controlled so that a desired optical path can be added and opened. To do.

Next, FIG. 16 shows an example of a database.
Among the databases, FIG. 16A is a database that holds the connection relationship of optical fibers connecting the arrayed waveguide diffraction gratings. If the arrayed waveguide gratings belonging to the communication node device A and the communication node device B are not directly connected by an optical fiber, “X” meaning “not connected” is set in the A row B column and the B row A column of the database. Hold. Further, if the arrayed waveguide gratings belonging to the communication node device A and the communication node device B are directly connected by an optical fiber via the port C, the port C is connected to the A row B column and the B row A column of the database. "C" indicating that the connection is established through the network.

  In FIG. 16, the arrayed waveguide diffraction grating belonging to node 1 and node 2, the arrayed waveguide diffraction grating belonging to node 3 and node 5, and the arrayed waveguide diffraction belonging to node 4 and node 6 via port 5. An arrayed waveguide diffraction grating belonging to node 1 and node 4, an arrayed waveguide diffraction grating belonging to node 2 and node 3, and an arrayed waveguide diffraction belonging to node 5 and node 6 via a port 6 connected to the grating The database is shown when the grid is connected.

Among the databases, (b) is a database that holds input / output characteristics of the arrayed waveguide diffraction grating.
In FIG. 16, in the case of input / output characteristics, when a signal of wavelength λ (a + b−1) is input to the a-th input port of the arrayed waveguide grating, it is output to the b-th output port of the arrayed waveguide grating. The database is shown.

  Among the databases, (c) is a database that holds output wavelengths and output on / off states of the wavelength converters connected to the arrayed waveguide gratings. In this database, among the wavelength converters, the wavelength converters connected to the same numbered input ports of the arrayed waveguide diffraction grating are collected and provided as separate databases.

In each database of (c), the seventh row holds the number of the input port of the arrayed waveguide grating to which the wavelength converter of interest is connected.
The first column of the database holds the number of the communication node device to which the wavelength conversion device belongs.
The second column holds the state of the wavelength conversion device. That is, “OFF” is held when the wavelength converter belonging to the communication node device is in the off state, and “wavelength number of output wavelength” is held when the wavelength conversion device is in the on state.

The third column holds the type of input signal of the wavelength converter. That is, when the input signal to the wavelength converter belonging to the communication node device is an output signal of the communication node device, “X” is held.
If the input signal to the wavelength converter belonging to the communication node device is the output signal of the output port of the arrayed waveguide grating having the same number as the input port number to which the wavelength converter is connected, “loop” ".

In FIG. 16, among the wavelength converters connected to the port 1 of the arrayed waveguide grating, the wavelength converters belonging to the first, second, third, and fifth communication node devices are in the off state, and 4 This shows a state in which the wavelength converter belonging to the sixth communication node device outputs a wavelength of λ5, and the wavelength converter belonging to the sixth communication node device outputs a wavelength of λ6.
At the same time, the wavelength conversion devices belonging to the first, third, fourth and fifth communication node devices are inputted with the output signals of the communication node devices, and the wavelength conversion devices belonging to the second and sixth communication node devices are connected to each other. A case is shown in which the output signal of the first output port of the arrayed waveguide grating is being input.

Of the wavelength converters connected to port 2 of the arrayed waveguide grating, the wavelength converters belonging to the first, second, third, and fourth communication node apparatuses are in the off state, and the fifth communication node apparatus This shows a state where the wavelength converter to which the wavelength converter belongs belongs to output a wavelength of λ7, and the wavelength converter belonging to the sixth communication node device outputs a wavelength of λ6.
At the same time, the wavelength conversion devices belonging to the first, third, fourth and fifth communication node devices are inputted with the output signals of the communication node devices, and the wavelength conversion devices belonging to the second and sixth communication node devices are connected to each other. The case where the output signal of the second output port of the arrayed waveguide grating is input is shown.

All of the wavelength converters connected to port 3 of the arrayed waveguide grating are shown to be off.
At the same time, the wavelength conversion devices belonging to the first, second, fourth, and sixth communication node devices receive the output signal of the communication node device.
In addition, the wavelength converters belonging to the third and fifth communication node devices are shown when the output signal of the third output port of the connected arrayed waveguide grating is input.

All of the wavelength converters connected to port 4 of the arrayed waveguide grating are shown to be off.
At the same time, the wavelength converters belonging to the first, second, fourth and sixth communication node devices receive the output signal of the communication node device.
In addition, the wavelength converters belonging to the third and fifth communication node devices are shown when the output signal of the fourth output port of each connected arrayed waveguide grating is input.

Among the databases, FIG. 16D is a database that holds the wavelength conversion devices used in the set paths.
The number of the communication node device corresponding to the start point and the end point of the route in the first column, the number of the communication node device via the route in the second column, the communication node device to which the wavelength converter used in the route belongs in the third column The number and the port number of the connected arrayed waveguide grating are held.

  In FIG. 16, there is one set path, and the communication node apparatus 4 and the communication node apparatus 5 are connected via the communication node 6, and the path is connected to the first port of the arrayed waveguide grating. The connected wavelength conversion device belonging to the communication node device 4, the wavelength conversion device belonging to the communication node device 6 connected to the first port of the array waveguide diffraction grating, and the array waveguide diffraction grating 2 The wavelength converter belonging to the communication node device 5 connected to the second port and the wavelength converter belonging to the communication node device 6 connected to the second port of the arrayed waveguide grating are used. If the database is shown.

In managing the connection relationship between communication node devices by the connection relationship management server 13, a database is used for "when establishing a connection relationship between new communication nodes" and "when terminating a connection relationship between existing communication nodes". The transmitter / receiver control devices 11-1 to 11-6 are controlled via the communication line 14.
First, the operation of the connection relationship management server 13 when it becomes necessary to newly connect the communication node device α and the communication node device β will be described.
Here, the cause of the necessity to connect the communication node device α and the communication node device β is, for example, the connection given to the processor unit 3010 of the connection relation management server 13 from the administrator's console of the optical communication network system of the present invention. Instructions.

At this time, the connection relation management server 13 first confirms that the elements of the α row and β column and the β row α column are values “Y” other than “X” in the database of FIG.
Then, when the elements of α row β column and β row α column are “X”, the connection relationship management server 13 notifies the administrator that connection is impossible.
Next, the connection relation management server 13 determines that one of the α rows in the two databases in which the port numbers described in the seventh row are odd numbers 2n−1 and even numbers 2n from the database in FIG. The element in the second column is “OFF”, the element in the second column of the other β row is “OFF”, and the elements in both the α row and β row of both databases are “X”. Search a database.

At this time, the port number described in the seventh row of the database in which the element in the second column of the α row is “OFF” is αα, and the seventh row of the database in which the element in the second column of the β row is “OFF”. The described port number is ββ.
Then, when a plurality of databases are searched, the connection relationship management server 13 narrows down the search result to one by some method.
As a method of narrowing down the search results, for example, there is a method of making αα the smallest of the obtained search results. If the search result is not obtained, the administrator is notified that the connection is impossible.

Thereby, the connection relation management server 13 sends a control signal to the corresponding transmission / reception apparatus control apparatus based on the search result, and controls each wavelength conversion apparatus via the transmission / reception apparatus control apparatus.
Specifically, the connection relationship management server 13 belongs to the communication node device α, and the control signal for turning on the wavelength conversion device connected to the αα-th port of the arrayed waveguide grating and the signal light are Y Referring to the database of FIG. 16B so as to be output from the second port, a signal for causing the transmission / reception apparatus control apparatus to generate a control signal for setting the output wavelength to λ (αα + Y−1) is sent.
At the same time, the connection relationship management server 13 changes the element in the second column of the α row of the database with the port number αα described in the seventh row to λ (αα + Y−1) in the database of FIG. To do.

Further, the connection relation management server 13 belongs to the communication node device β, and a control signal for turning on the wavelength conversion device connected to the ββ-th port of the arrayed waveguide diffraction grating and the Y-th port for the signal light 16b is referred to and the control signal for setting the output wavelength to λ (ββ + Y−1) is transmitted to the transmission / reception apparatus control apparatus.
At the same time, the connection relationship management server 13 changes the element in the second column of the β row of the database having the port number ββ described in the seventh row to λ (ββ + Y−1) in the database of FIG. To do.
Finally, the connection relationship management server 13 sets the communication node device α and the communication node device β in the first column of the empty row in the database of FIG. 16D, and αα of the arrayed waveguide grating in the third column. Information indicating the wavelength conversion device connected to the communication port device α and the wavelength conversion device belonging to the communication node device α and the wavelength conversion device connected to the ββth port of the arrayed waveguide diffraction grating and belonging to the communication node device β is entered.

Next, the operation of the connection relationship management server 13 when it becomes necessary to newly connect the communication node device α and the communication node device β via the communication node device γ will be described.
Here, the cause of the necessity to connect the communication node device α and the communication node device β via the communication node device γ is, for example, from the administrator's console of the optical communication network system of the present invention. 13 is a connection instruction given to 13 processor units 3010.

At this time, in the database of FIG. 16A, the connection relationship management server 13 first has a value “Y” in which the elements of α row γ column and γ row α column are not “X”, and γ row β column and β row. It is confirmed that the element of the γ column is a value “Z” that is not “X”. If at least one of them is “X”, the administrator is notified that connection is not possible.
Then, in the database of FIG. 16C, the connection relationship management server 13 determines the second column of one α row in the two databases in which the port numbers described in the seventh row are odd numbers 2n−1 and even numbers 2n. And the second column element of the γ row are “OFF”, the second column element of the β row and the second column element of the γ row are “OFF”, and the α row of both databases And the third column element in the β row are both “X”, and the database in which both the third column elements in the γ row of both databases are “loop” is searched.

At this time, the port number described in the seventh row of the database in which the element in the second column of the α row and the element in the second column of the γ row are “OFF” is αα, the element in the second column of the β row and the γ row The port number described in the seventh row of the database in which the element in the second column is “OFF” is ββ.
Then, when a plurality of databases are searched, the connection relationship management server 13 narrows down the search result to one by some method.
As a method of narrowing down the search results, for example, there is a method of making αα the smallest of the obtained search results.
Further, when the search result is not obtained, the connection relationship management server 13 notifies the administrator that the connection is impossible.

Then, based on the search result, the connection relationship management server 13 sends a control signal to the transmission / reception device control device to control the wavelength conversion device.
Specifically, the connection relationship management server 13 belongs to the communication node device α, and the control signal for turning on the wavelength conversion device connected to the αα-th port of the arrayed waveguide grating and the signal light are Y A signal for causing the transmission / reception device control device to generate a control signal for setting the output wavelength to λ (αα + Y-1) is transmitted with reference to the database of FIG. .
At the same time, the connection relationship management server 13 converts the element in the second column of the α row of the database having the port number αα described in the seventh row to λ (αα + Y−1) in the database of FIG. Change to

Further, the connection relation management server 13 belongs to the communication node device β, and a control signal for turning on the wavelength conversion device connected to the ββ-th port of the arrayed waveguide grating and the signal light is the Z-th port As shown in FIG. 16B, a signal for causing the transmission / reception device control device to generate a control signal for setting the output wavelength to λ (ββ + Z−1) is sent with reference to the database of FIG.
At the same time, the connection relationship management server 13 sets the element in the second column of the β row of the database whose port number described in the seventh row is ββ in the database of FIG. 16C as λ (ββ + Z−1). Change to

Further, the connection relation management server 13 includes a control signal for turning on the wavelength conversion device connected to the ααth port in the arrayed waveguide grating belonging to the communication node device γ, and the signal light is Zth. 16B, the control signal for setting the output wavelength to λ (αα + Z−1) and the wavelength converter connected to the ββ-th port are referred to the database of FIG. A control signal for setting the output wavelength to λ (ββ + Y−1) with reference to the database of FIG. 16B so that the control signal to be turned on and the signal light is output from the Y-th port, Send a signal to be generated by the transceiver controller.
At the same time, the connection relationship management server 13 converts the element in the second column of the γ row of the database having the port number αα described in the seventh row to λ (αα + Z−1) in the database of FIG. In the database shown in FIG. 16C, the element in the second column of the γ row of the database having the port number ββ described in the seventh row is changed to λ (ββ + Y−1).

  Finally, the connection relationship management server 13 sets the communication node device α and the communication node device β in the first column of the vacant row in the database of FIG. 16D, the communication node device γ in the second column, and the third column. A wavelength converter connected to the ααth port of the arrayed waveguide diffraction grating and belonging to the communication node device α, a wavelength converter connected to the ββth port of the arrayed waveguide diffraction grating and belonging to the communication node device β, A wavelength converter connected to the ααth port of the arrayed waveguide diffraction grating and belonging to the communication node device γ, and a wavelength converter connected to the ββth port of the arrayed waveguide diffraction grating and belonging to the communication node device γ are shown. Fill in the information.

Finally, an operation for stopping a connection relationship between existing communication nodes will be described.
First, the connection relationship management server 13 searches for a row corresponding to the connection relationship to be stopped, using the information described in the first and second columns of the database in FIG. When a plurality of rows are searched, the search result is narrowed down to one by some method.
As a method of narrowing down the search results, for example, there is a method of making the row number the smallest among the obtained search results.

The connection relation management server 13 sends a control signal to the transmission / reception apparatus control apparatus based on the search result, and controls the wavelength conversion apparatus.
That is, the connection relationship management server 13 sends a signal for causing the transmission / reception device control device to generate a control signal for stopping the output of the wavelength conversion device held in the third column of the search result.
Also, the connection relationship management server 13 simultaneously changes the value in the second column of the corresponding database in FIG. 16C to “OFF”, and finally the database search result in FIG. 16D is obtained. Clear the line description.
As described above, the connection relationship between the communication nodes can be managed. Note that the management method of the connection relationship between the communication nodes does not have to strictly follow the form of this patent, and it is sufficient that the same function can be realized, and such a method is also included in this patent.

<Second Embodiment>
FIG. 5 is a diagram for explaining the second embodiment of the present invention, and shows the structure of each communication node device and the interface device for optical communication in the optical communication network system of the present invention.
5, 101 is a 6-input 6-output arrayed waveguide grating, 102-a (a is an integer of 1 ≦ a ≦ 4) is a wavelength converter, and 103-b (b is 1 ≦ b ≦). (Integer of 4) is a transmission port of the communication node device, 104-b is a reception port of the communication node device, 105-a is a 1-input 2-output optical switch, and 106-a is 2-input 1-output. It is an optical switch.

The second embodiment is the same as the first embodiment described above.
A, 2n-1 and 2nth input / output ports of a 6-input 6-output arrayed waveguide grating (n is an integer in the range of 1≤n≤N) are treated as a set, and the 2n-1st input port The wavelength conversion device 102- (2n-1) connected to the output light of the 2n-1st output port is input, and the wavelength conversion device 102-2n connected to the 2nth input port 2n The output light of the second output port is input.
B, the wavelength converter 102- (2n-1) connected to the 2n-1st input port of the 6-input 6-output arrayed waveguide grating has the first transmission port 103-x of the communication node device. Signal light is input from (x is an integer), a signal is input from the 2n-th output port to the first reception port 104-x of the communication node device, and is connected to the 2n-th input port at the same time. Signal light is input to the conversion device 102-2n from the second transmission port 103-y (y is an integer different from x) of the communication node device, and the second reception port 104-y of the communication node device A signal is input from the (2n-1) -th output port.
The configuration of either A or B of the above is configured so that both can be selected by using an optical switch.

That is, in the 2n-1th and 2nth input ports and output ports of the 6-input 6-output arrayed waveguide grating, the output light of the 2n-1st output port is the 1-input 2-output optical switch 105- ( 2n-1) input port.
The first output port of the 1-input 2-output optical switch 105- (2n-1) is connected to the reception port 104-2n of the communication node device, and the 1-input 2-output optical switch 105- (2n-1). The second output port is connected to the first input port of the 2-input 1-output optical switch 106- (2n-1).
The transmission port 103- (2n-1) of the communication node device is connected to the second input port of the 2-input 1-output optical switch 106- (2n-1), and the 2-input 1-output optical switch 106- ( The wavelength conversion device 102- (2n-1) is connected to the output port 2n-1).

The output light of the 2n-th output port is connected to the input port of the 1-input 2-output optical switch 105-2n.
The first output port of the 1-input 2-output optical switch 105-2n is connected to the reception port 104- (2n-1) of the communication node device, and the second output of the 1-input 2-output optical switch 105-2n. The port is connected to the first input port of the 2-input 1-output optical switch 106-2n.
The second input port of the 2-input 1-output optical switch 106-2n is connected to the transmission port 103-2n of the communication node device, and the output port of the 2-input 1-output optical switch 106-2n is A wavelength converter 102-2n is connected.

The 1-input 2-output optical switches 105- (2n-1) and 105-2n and the 2-input 1-output optical switches 106- (2n-1) and 106-2n are linked to each other in terms of input / output relations. When the signal light input by the optical switch is output to the first output port, the 2-input 1-output optical switch outputs the signal light input to the second input port to the output port, while 1 When the input 2-output optical switch outputs the input signal light to the second output port, the 2-input 1-output optical switch outputs the signal light input to the first input port to the output port.
By adopting such a configuration, it is possible to change whether the input signal is received by the communication node device or bypass the communication node device by setting the optical switch.

In order to manage the optical communication network system having the above configuration, the connection relation management server 13 shown in the first embodiment is connected to the processor section of the connection relation management server 13 from the administrator console of the optical communication network system according to the present invention. Based on the connection instruction given to 3010, a function of generating a control signal for changing the connection of the optical switch via each transmission / reception device controller is added.
With this function, in the database shown in FIG. 16C, the value in the third column of the corresponding database can be changed between “X” and “loop”.
Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

<Third Embodiment>
FIG. 6 is a diagram for explaining a third embodiment of the present invention, and shows the structure of each communication node device and optical communication interface device in the optical communication network system of the present invention.
In FIG. 6, 101 is a 6-input 6-output arrayed waveguide grating, 102-a (a is an integer of 1 ≦ a ≦ 4) is a wavelength converter, and 103-b (b is 1 ≦ b ≦). (Integer of 4) is a transmission port of the communication node device, 104-b is a reception port of the communication node device, and 107-a is a 2-input 2-output optical switch.

The third embodiment is the same as the first embodiment described above.
C, 2n-1 and 2nth input / output ports of an arrayed waveguide grating with 6 inputs and 6 outputs (n is an integer satisfying 1≤n≤N) are treated as a set and connected to the 2n-1st input port. The wavelength conversion device 102-2 (2n-1) is supplied with the output light of the 2n-1st output port, and 2n is input to the wavelength conversion device 102-2n connected to the 2nth input port. The output light of the second output port is input.
D, the wavelength converter 102- (2n-1) connected to the 2n-1th input port of the 6-input 6-output arrayed waveguide grating has a first transmission port 103- of the communication node device. Signal light is input from x (x is an integer), and the first reception port 104-x of the communication node device receives a signal from the 2nth output port and is connected to the 2nth input port at the same time. Signal light is input to the wavelength conversion device 102-2n from the second transmission port 103-y (y is an integer different from x) of the communication node device, and the second reception port 104-y of the communication node device. The signal is input from the (2n-1) th output port.
The configuration of either C or D of the above is configured so that both can be selected by using an optical switch.

That is, in the 2n-1 and 2n-th input ports and output ports of the arrayed waveguide grating, the output light of the 2n-1st output port is the second input 2-output optical switch 107- (2n-1). 1 input port.
The first output port of the 2-input 2-output optical switch 107- (2n-1) is connected to the reception port 104-2n of the communication node device.
The transmission port 103- (2n-1) of the communication node device is connected to the second input port of the 2-input 2-output optical switch 107- (2n-1).
Further, the second output port of the 2-input 2-output optical switch is connected to the wavelength converter 102- (2n-1).

  The output light of the 2n-th output port is connected to the first input port of the 2-input 2-output optical switch 107-2n. The first output port of the 2-input 2-output optical switch 107-2n is connected to the reception port 104- (2n-1) of the communication node device. The transmission port 103-2n of the communication node device is connected to the second input port of the 2-input 2-output optical switch 107-2n. A second output port of the 2-input 2-output optical switch is connected to the wavelength converter 102-2n.

The 2-input 2-output optical switches 107- (2n-1) and 107-2n both output the signal light input to the first input port to the first output port by the same input / output relationship. When the signal light input to the second input port is output to the second output port, while the signal light input to the first input port is output to the second output port, The signal light input to the second input port is output to the first output port.
By adopting such a configuration, it becomes possible to change whether the input signal is received by the communication node device or bypass the communication node device by the setting of the optical switch.

In order to manage the optical communication network system having the above configuration, the connection relationship management server 13 shown in the first embodiment is connected to the processor unit of the connection relationship management server 13 from the administrator's console of the optical communication network system according to the present invention. Based on the connection instruction given to 3010, a function of generating a control signal for changing the connection of the optical switch via the transmission / reception apparatus controller is added.
With this function, in the database shown in FIG. 16C, the value in the third column of the corresponding database can be changed between “X” and “loop”.
Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

<Fourth Embodiment>
FIG. 7 is a diagram for explaining the fourth embodiment of the present invention, and shows the structure of each communication node device and the interface device for optical communication in the optical communication network system of the present invention.
In FIG. 7, 102-a (a is an integer of 1 ≦ a ≦ 4) is a wavelength converter, 103-1 and 103-2 are transmission ports of communication node devices, and 104-1 and 104-2 are Reference numeral 108 denotes a reception port of the communication node device. Reference numeral 108 denotes a 4-input 2-output array waveguide diffraction grating, and 109 denotes a 2-input 4-output array waveguide diffraction grating.
Here, the left side port of the arrayed waveguide grating 108 is an input port, and the lower side port is an output port. The right side port of the arrayed waveguide grating 109 is an output port, and the lower side port is an input port.

The fourth embodiment is the same as the first embodiment described above.
Instead of the 6-input 6-output array waveguide diffraction grating 101, the input port and the output port correspond to each other, that is, the output port of one arrayed waveguide diffractive device and the input port of the other arrayed waveguide diffractive device. And the number of the input port of one arrayed waveguide diffractive device and the number of the output port of the other arrayed waveguide diffractive device match at M, so that
It has a 4-input 2-output arrayed waveguide grating 108 and a 2-input 4-output arrayed waveguide grating 109, and the nth input port (n is 1 ≦ n) in the 4-input 2-output arrayed waveguide grating 108. ≦ 4 is regarded as the nth input port in the 6-input 6-output arrayed waveguide grating 101, and the mth output port in the 4-input 2-output arrayed waveguide grating 108 (m is 1 ≦ m ≦). 2) is regarded as the 4 + m-th output port in the 6-input 6-output array waveguide diffraction grating 101, and the m-th input port in the 2-input 4-output array waveguide diffraction grating 109 is a 6-input 6-output array conductor. Considering the 4 + m-th input port in the waveguide diffraction grating, the n-th output port in the 2-input 4-output array waveguide diffraction grating 109 is a 6-input 6-output array waveguide. Regarded as the n-th output ports in diffraction grating.

Here, as shown in FIG. 8, the input / output characteristics of the 4-input 2-output arrayed waveguide diffraction grating 108 and the 2-input 4-output arrayed waveguide diffraction grating 109 are shown in FIG. By reversing, the number of input / output ports that generate bypasses and paths to other communication node devices can be made to correspond to each other, and exactly the same functions as those in the first embodiment can be realized.
Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

<Fifth Embodiment>
FIG. 9 is a diagram for explaining the fifth embodiment of the present invention, and shows the structure of each communication node device and the interface device for optical communication in the optical communication network system of the present invention.
In FIG. 9, 102-a (a is an integer of 1 ≦ a ≦ 4) is a wavelength converter, 103-b (b is an integer of 1 ≦ b ≦ 4) is a transmission port of the communication node device, and 104 -B is a receiving port of the communication node device; 105-a is a 1-input 2-output optical switch; 106-a is a 2-input 1-output optical switch; 108 is a 4-input 2-output array waveguide A diffraction grating 109 is a 2-input 4-output arrayed waveguide diffraction grating.
Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

The fifth embodiment is the same as the second embodiment.
Instead of the 6-input 6-output array waveguide diffraction grating 101, the input port and the output port correspond to each other, that is, the output port of one arrayed waveguide diffractive device and the input port of the other arrayed waveguide diffractive device. And the number of the input port of one arrayed waveguide diffractive device and the number of the output port of the other arrayed waveguide diffractive device match at M, so that
It has a 4-input 2-output arrayed waveguide grating 108 and a 2-input 4-output arrayed waveguide grating 109, and the nth input port (n is 1 ≦ n) in the 4-input 2-output arrayed waveguide grating 108. ≦ 4 is regarded as the nth input port in the 6-input 6-output arrayed waveguide grating 101, and the mth output port in the 4-input 2-output arrayed waveguide grating 108 (m is 1 ≦ m ≦). 4) is regarded as the 4 + m-th output port in the 6-input 6-output array waveguide diffraction grating 101, and the m-th input port in the 2-input 4-output array waveguide diffraction grating 109 is a 6-input 6-output array conductor. Considering the 4 + m-th input port in the waveguide diffraction grating, the n-th output port in the 2-input 4-output array waveguide diffraction grating 109 is a 6-input 6-output array waveguide. Regarded as the n-th output ports in diffraction grating.

Here, as shown in FIG. 8, the input / output characteristics of the 4-input 2-output arrayed waveguide diffraction grating 108 and the 2-input 4-output arrayed waveguide diffraction grating 109 are shown in FIG. By reversing, the number of input / output ports that generate bypasses and paths to other communication node devices can be made to correspond to each other, and exactly the same functions as those in the second embodiment can be realized.
Other configurations and operations are the same as those of the second embodiment, and thus description thereof is omitted.

<Sixth Embodiment>
FIG. 10 is a diagram for explaining the sixth embodiment of the present invention, and is a diagram showing the structure of each communication node device and the interface device for optical communication in the optical communication network system of the present invention.
In FIG. 10, 102-a (a is an integer of 1 ≦ a ≦ 4) is a wavelength converter, 103-b (b is an integer of 1 ≦ b ≦ 4) is a transmission port of the communication node device, and 104 -B is a receiving port of the communication node device, 107-a is a 2-input 2-output optical switch, 108 is a 4-input 2-output array waveguide diffraction grating, and 109 is a 2-input 4-output array conductor. It is a waveguide diffraction grating.

The sixth embodiment is the same as the third embodiment.
Instead of the 6-input 6-output array waveguide diffraction grating 101, the input port and the output port correspond to each other, that is, the output port of one arrayed waveguide diffractive device and the input port of the other arrayed waveguide diffractive device. And the number of the input port of one arrayed waveguide diffractive device and the number of the output port of the other arrayed waveguide diffractive device match at M, so that
It has a 4-input 2-output arrayed waveguide grating 108 and a 2-input 4-output arrayed waveguide grating 109, and the nth input port (n is 1 ≦ n) in the 4-input 2-output arrayed waveguide grating 108. ≦ 4 is regarded as the nth input port in the 6-input 6-output arrayed waveguide grating 101, and the mth output port in the 4-input 2-output arrayed waveguide grating 108 (m is 1 ≦ m ≦). 2) is regarded as the 4 + m-th output port in the 6-input 6-output array waveguide diffraction grating 101, and the m-th input port in the 2-input 4-output array waveguide diffraction grating 109 is a 6-input 6-output array conductor. Considering the 4 + m-th input port in the waveguide diffraction grating, the n-th output port in the 2-input 4-output array waveguide diffraction grating 109 is a 6-input 6-output array waveguide. Regarded as the n-th output ports in diffraction grating.

Here, as shown in FIG. 8, the input / output characteristics of the 4-input 2-output arrayed waveguide diffraction grating 108 and the 2-input 4-output arrayed waveguide diffraction grating 109 are shown in FIG. By reversing, the number of input / output ports that generate bypasses and paths to other communication node devices can be made to correspond to each other, and the same function as that of the third embodiment can be realized.
Other configurations and operations are the same as those of the third embodiment, and thus description thereof is omitted.

As described above, the optical communication network system of the present invention has been described in the case of M = 2 and N = 2 according to the first to sixth embodiments. However, the optical communication network system of the present invention can be applied to any scale of M and N. It is obvious that a communication network system can be constructed.
Further, the connection relationship between the transmission / reception port of each communication node device and the port of the arrayed waveguide grating is not limited to the relationship shown in FIGS. 1, 5, 6, 7, 9, and 10. It is obvious that other connection combinations that realize the same operation as the embodiment are also included in the present invention.

It is a block diagram which shows the structural example of the interface apparatus for optical communications by the 1st Embodiment of this invention. It is a conceptual diagram which shows the relationship between the number of the input port of the arrayed-waveguide diffraction grating in the 1st Embodiment of this invention, the number of an output port, and the wavelength of the input optical signal. It is a conceptual diagram explaining the optical path provided between different communication node apparatuses in the 1st Embodiment of this invention. It is a conceptual diagram explaining the optical path provided between different communication node apparatuses in the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the interface apparatus for optical communications by the 2nd Embodiment of this invention. It is a block diagram which shows the structural example of the interface apparatus for optical communications by the 3rd Embodiment of this invention. It is a block diagram which shows the structural example of the interface apparatus for optical communications by the 4th Embodiment of this invention. The table which shows the relationship between the number of an input port, the number of an output port, or the wavelength of the input optical signal of the arrayed-waveguide diffraction grating in the 4th Embodiment of this invention. It is a block diagram which shows the structural example of the interface apparatus for optical communications by the 5th Embodiment of this invention. It is a block diagram which shows the structural example of the interface apparatus for optical communications by the 6th Embodiment of this invention. It is a block diagram explaining the conventional optical communication network. It is a block diagram explaining the conventional optical communication network. It is a figure explaining the conventional optical cross-connect apparatus. FIG. 2 is a block diagram illustrating a configuration of a control system that performs control in the first embodiment of the present invention. It is a conceptual diagram which shows the example of 1 structure of the connection relationship management server 13 in the 1st Embodiment of this invention. It is a figure which shows the example of 1 structure of the table memorize | stored in the database of the connection relation management apparatus in the 1st Embodiment of this invention.

Explanation of symbols

101, 201: arrayed waveguide diffraction grating ((2N + M) input (2N + M output))
102, 202 ... wavelength conversion device 103, 203 ... transmission port (transmission port of communication node device)
104, 204... Reception port (communication node device reception port)
105 ... Optical switch (1 input 2 output optical switch)
106 ... Optical switch (2 input 1 output optical switch)
107: Optical switch (2-input 2-output optical switch)
108: Arrayed waveguide diffraction grating (2N input M output)
109 ... Array waveguide diffraction grating (M input 2N output)
DESCRIPTION OF SYMBOLS 1001 ... Communication node apparatus 1002 ... WDM communication apparatus 1003 ... Optical fiber 1004 ... Optical cross-connect apparatus 1101 ... Input optical fiber 1102 ... Output optical fiber 1103 ... Optical demultiplexing circuit 1104 ... Optical matrix switch 1105 ... Optical multiplexing circuit 11 ... Transmission / reception control Device 13 ... Connection relationship management server 14 ... Communication line 3010 ... Processor unit 3020 ... Control signal input / output interface 3030 ... Storage medium

Claims (10)

In an optical communication network system in which an interface device for optical communication is connected to each communication node device, and the interface devices for optical communication are connected by an optical fiber,
The interface for optical communication has an arrayed waveguide grating with (2N + M) input (2N + M) output (N and M are integers),
The 2N + mth (1 ≦ m ≦ M) output port and input port of the arrayed waveguide grating are the 2N + mth input port and output port of the arrayed waveguide grating of another optical communication interface device. Connected to
A wavelength conversion device that converts the input signal light into a desired wavelength and outputs it at the first to 2Nth input ports of the arrayed waveguide grating is provided,
Regarding the 2n-1 and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating,
The output light from the 2n-1st output port is input to the wavelength converter connected to the 2n-1th input port, and the 2nth input to the wavelength converter connected to the 2nth input port. Is the output light of the output port input?
Alternatively, signal light is input from the first transmission port of the communication node device to the wavelength converter connected to the 2n−1th input port, and the 2nth signal is input to the first reception port of the communication node device. The signal light is input from the output port of the communication node device, and simultaneously, the signal light from the second transmission port of the communication node device is input to the wavelength converter connected to the 2n-th input port. 2. An optical communication network system, wherein the signal light from the 2n-1st output port is input to the two reception ports. At the 2n-1 and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating,
The output light of the 2n-1st output port is connected to the input port of the first 1-input 2-output optical switch, and the first output port of the first 1-input 2-output optical switch is connected to the communication node device. A second output port of the first one-input two-output optical switch is connected to a first input port of the first two-input one-output optical switch;
A first transmission port of the communication node device is connected to a second input port of the first two-input one-output optical switch, and an output port of the first two-input one-output optical switch is 2n−1th. Connected to the wavelength converter connected to the input port,
The output light of the 2n-th output port is connected to the input port of the second 1-input 2-output optical switch, and the first output port of the second 1-input 2-output optical switch is the first of the communication node device. The second output port of the second one-input two-output optical switch connected to the reception port is connected to the first input port of the second two-input one-output optical switch, and the second two-input one-output optical switch The second input port of the communication node device is connected to the second transmission port of the communication node device, and the output port of the second 2-input 1-output optical switch is connected to the wavelength conversion device connected to the 2n-th input port. And
The first and second one-input two-output optical switches and the first and second two-input one-output optical switches are linked in input / output relations,
When the signal light input by the 1-input 2-output optical switch is output to the first output port, the 2-input 1-output optical switch outputs the signal light input to the second input port to the output port. On the other hand, when the signal light input by the 1-input 2-output optical switch is output to the second output port, the 2-input 1-output optical switch receives the signal light input to the first input port. It outputs to an output port. The optical communication network system of Claim 1 characterized by the above-mentioned. At the 2n-1 and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating,
The output light of the (2n-1) th output port is connected to the first input port of the first 2-input 2-output optical switch, and the first output port of the first 2-input 2-output optical switch is the communication node. A second input port of the first two-input two-output optical switch is connected to a first transmission port of the communication node device, and the first two-input two-output optical switch is connected to the second reception port of the device; The second output port is connected to the wavelength converter connected to the 2n-1th input port,
The output light of the 2n-th output port is connected to the first input port of the second 2-input 2-output optical switch, and the first output port of the second 2-input 2-output optical switch is connected to the communication node device. The second input port of the second 2-input 2-output optical switch is connected to the first receiving port, the second input port of the second 2-input 2-output optical switch is connected to the second transmission port of the communication node device. 2 output ports are connected to the wavelength converter connected to the 2nth input port,
The first and second 2-input 2-output optical switches have the same input / output relationship;
When the first and second 2-input 2-output optical switches output the signal light input to the first input port to the first output port, the signal light input to the second input port is output. When the signal light input to the second output port is output to the second output port, the signal light input to the second input port is output to the first output port. It outputs to an output port. The optical communication network system of Claim 1 characterized by the above-mentioned.   The optical communication network system according to any one of claims 1 to 3, wherein the arrayed waveguide grating has a wavelength circulation property. In place of (2N + M) input (2N + M) output arrayed waveguide grating (N and M are integers), 2N input M output arrayed waveguide grating and M input 2N output arrayed waveguide grating,
The nth input port (where n is an integer between 1 and 2N) in the 2N input M output arrayed waveguide grating is regarded as the nth input port in the (2N + M) input (2N + M) output arrayed waveguide grating,
The m-th output port (m is an integer from 1 to M) in the 2N input M-output arrayed waveguide grating is regarded as the 2N + mth output port in the (2N + M) -input (2N + M) -output arrayed waveguide grating,
The m-th input port in the M-input 2N-output arrayed waveguide grating is regarded as the 2N + m-th input port in the (2N + M) -input (2N + M) -output arrayed-waveguide grating,
The n-th output port in the M-input 2N-output arrayed waveguide grating is regarded as the n-th output port in the (2N + M) -input (2N + M) -output arrayed waveguide grating, and is connected to other components. An optical communication network system according to any one of claims 1 to 3. It is an interface device for optical communication that connects each communication node device in an optical communication network system via an optical fiber,
(2N + M) input (2N + M) output arrayed waveguide grating (N and M are integers)
The 2N + mth (1 ≦ m ≦ M) output port and input port of the arrayed waveguide grating are the 2N + mth input port and output port of the arrayed waveguide grating of another optical communication interface device. Connected to
A wavelength conversion device that converts the input signal light into a desired wavelength and outputs it at the first to 2Nth input ports of the arrayed waveguide grating is provided,
Regarding the 2n-1 and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating,
The output light from the 2n-1st output port is input to the wavelength converter connected to the 2n-1th input port, and the 2nth input to the wavelength converter connected to the 2nth input port. Is the output light of the output port input?
Alternatively, signal light is input from the first transmission port of the communication node device to the wavelength converter connected to the 2n−1th input port, and the 2nth signal is input to the first reception port of the communication node device. The signal light is input from the output port of the communication node device, and simultaneously, the signal light from the second transmission port of the communication node device is input to the wavelength converter connected to the 2n-th input port. 2. An interface device for optical communication, wherein the signal light from the 2n-1st output port is input to the second receiving port. The output light of the 2n-1st output port is connected to the input port of the first 1-input 2-output optical switch, and the first output port of the first 1-input 2-output optical switch is connected to the communication node device. A second output port of the first one-input two-output optical switch is connected to a first input port of the first two-input one-output optical switch;
A first transmission port of the communication node device is connected to a second input port of the first two-input one-output optical switch, and an output port of the first two-input one-output optical switch is 2n−1th. Connected to the wavelength converter connected to the input port,
The output light of the 2n-th output port is connected to the input port of the second 1-input 2-output optical switch, and the first output port of the second 1-input 2-output optical switch is the first of the communication node device. The second output port of the second one-input two-output optical switch connected to the reception port is connected to the first input port of the second two-input one-output optical switch, and the second two-input one-output optical switch The second input port of the communication node device is connected to the second transmission port of the communication node device, and the output port of the second 2-input 1-output optical switch is connected to the wavelength conversion device connected to the 2n-th input port. And
The first and second one-input two-output optical switches and the first and second two-input one-output optical switches are linked in input / output relations,
When the signal light input by the 1-input 2-output optical switch is output to the first output port, the 2-input 1-output optical switch outputs the signal light input to the second input port to the output port. On the other hand, when the signal light input by the 1-input 2-output optical switch is output to the second output port, the 2-input 1-output optical switch receives the signal light input to the first input port. The optical communication interface device according to claim 6, wherein the optical communication interface device outputs to an output port. At the 2n-1 and 2nth (integer of 1 ≦ n ≦ N) input and output ports of the arrayed waveguide grating,
The output light of the (2n-1) th output port is connected to the first input port of the first 2-input 2-output optical switch, and the first output port of the first 2-input 2-output optical switch is the communication node. A second input port of the first two-input two-output optical switch is connected to a first transmission port of the communication node device, and the first two-input two-output optical switch is connected to the second reception port of the device; The second output port is connected to the wavelength converter connected to the 2n-1th input port,
The output light of the 2n-th output port is connected to the first input port of the second 2-input 2-output optical switch, and the first output port of the second 2-input 2-output optical switch is connected to the communication node device. The second input port of the second 2-input 2-output optical switch is connected to the first receiving port, the second input port of the second 2-input 2-output optical switch is connected to the second transmission port of the communication node device. 2 output ports are connected to the wavelength converter connected to the 2nth input port,
The first and second 2-input 2-output optical switches have the same input / output relationship;
When the first and second 2-input 2-output optical switches output the signal light input to the first input port to the first output port, the signal light input to the second input port is output. When the signal light input to the second output port is output to the second output port, the signal light input to the second input port is output to the first output port. The optical communication interface device according to claim 6, wherein the optical communication interface device outputs to an output port.   9. The optical communication interface apparatus according to claim 6, wherein the arrayed waveguide diffraction grating has a wavelength circulation property in an optical communication network system. In place of (2N + M) input (2N + M) output arrayed waveguide grating (N and M are integers), 2N input M output arrayed waveguide grating and M input 2N output arrayed waveguide grating,
The nth input port (where n is an integer between 1 and 2N) in the 2N input M output arrayed waveguide grating is regarded as the nth input port in the (2N + M) input (2N + M) output arrayed waveguide grating,
The m-th output port (m is an integer from 1 to M) in the 2N input M-output arrayed waveguide grating is regarded as the 2N + mth output port in the (2N + M) -input (2N + M) -output arrayed waveguide grating,
The m-th input port in the M-input 2N-output arrayed waveguide grating is regarded as the 2N + m-th input port in the (2N + M) -input (2N + M) -output arrayed-waveguide grating,
The n-th output port in the M-input 2N-output arrayed waveguide grating is regarded as the n-th output port in the (2N + M) -input (2N + M) -output arrayed waveguide grating, and is connected to other components. An interface device for optical communication according to any one of claims 6 to 8.

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