JP2003209863A - Optical cross connect apparatus, central controller, optical network, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid a wavelength conversion resources of a particular node and a link between nodes from intensively used by adaptively changing a cost imposed on wavelength conversion and links. <P>SOLUTION: Each node reports the operating state of the wavelength conversion resources and the operating state of the link resources between nodes to a network so as to adaptively change the cost imposed on wavelength conversion and the link. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is used in optical communication.
In particular, an optical cross-connect device equipped with a wavelength conversion function is placed in an optical network, the costs required to set the optical path for both link resources and wavelength conversion resources are calculated, and the optical path is set to the lowest cost optical path. To use. It should be noted that the cost here is the degree of occupation of network resources when setting an optical path, and the optical path set using the least amount of network resources is the lowest in cost when compared between the same two points. It is an optical path.

[0002]

2. Description of the Related Art Flexible path selection can be performed by incorporating a wavelength conversion device into an optical cross-connect device. This conventional example will be described with reference to FIG. FIG. 12 is a block configuration diagram of a conventional optical cross-connect device and a centralized control device.

In the conventional optical cross-connect device 1, the route calculator 6 calculates the route of the optical path according to the topology information recorded in the network topology database 8 of the centralized control device 19 provided in the optical network. By notifying the controller 2 of the calculation result, the controller 2 controls the switch 3 to set the optical path. At this time, if it is desired to convert the wavelength of the optical signal input from the input link, wavelength conversion is performed using the wavelength conversion device 4.

In such a conventional optical cross-connect device, by providing a wavelength conversion device, flexible route selection can be performed, but the device configuration becomes complicated and the device price becomes expensive. Therefore, it is necessary to handle a small number of wavelength conversion devices instead of incorporating wavelength conversion devices for all channels.

In such a case, the cost of the link resource and the cost of the wavelength conversion resource at the time of searching for the route are set in order to set the route including whether or not the wavelength conversion device is used for establishing a certain optical path. And the optical path is established based on the network topology information so that the total cost becomes the lowest.

[0006]

Conventionally, since the route calculation is performed using the cost value given in the initial state of the network, when the use status of the link resource or wavelength conversion resource in the network changes, , There is a problem that it is not possible to set a flexible path according to the situation.

For example, as described above, when a wavelength conversion device is repeatedly used by one optical cross-connect device, a node with a small residual wavelength conversion resource is used.
If many optical paths that require wavelength conversion are concentrated, wavelength conversion may become impossible for some optical paths,
In the worst case, an unfavorable situation occurs in which some optical paths are interrupted.

The present invention has been made against such a background, and adaptively changes the wavelength conversion and the cost given to the link, so that the wavelength conversion resources of a specific node and the links between the nodes are intensively used. It is an object of the present invention to provide an optical cross-connect device, a centralized control device, an optical network, a program, and a recording medium that can avoid the above-mentioned problems.

[0009]

According to the present invention, the costs of wavelength conversion and links are adaptively announced by notifying the network of the usage status of wavelength conversion resources and the usage status of link resources between nodes from each node. To prevent the wavelength conversion resource of a specific node and the links between the nodes from being intensively used.

That is, a first aspect of the present invention is to provide a means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a single-wavelength optical signal demultiplexed by the demultiplexing means. A means for switching to a predetermined route, a means for wavelength converting the optical signal of the single wavelength in the switching process of the switching means, and a single wavelength output to the same output link switched by the switching means Means for wavelength-multiplexing the optical signal of, the means for wavelength conversion is provided less than the maximum number of routes of the switching means, the maximum wavelength multiplexing number that can be wavelength-multiplexed for one output link There is an upper limit, and the optical cross-connect device is installed based on the network topology information, the number of wavelength conversion means installed, and the maximum number of wavelength division multiplexing. A from the optical cross-connect apparatus having a means for setting the optical path to another optical cross-connect device it is.

Here, a feature of the present invention is that the means for monitoring the air-blocking condition of the means for wavelength conversion, the means for monitoring the number of wavelength multiplexes of the output link, and the means for monitoring are provided. A means for accumulating a monitoring result, wherein the means for setting the optical path refers to the monitoring result accumulated in the accumulating means to determine an optical path from the own optical cross-connect device to another optical cross-connect device. There is a means for setting and a means for notifying the other optical cross-connect device of the monitoring result accumulated in the accumulating means at a predetermined timing.

In this way, by notifying all the optical cross-connect devices in the optical network of the air-blocking status of the wavelength converting means and the wavelength multiplexing number of the output links, which change from moment to moment, each optical cross-connect device is notified. Can adaptively set a low-cost optical path. Therefore, it is possible to avoid a situation in which a large number of optical paths that require wavelength conversion are set for the optical cross-connect device having insufficient wavelength conversion resources.

The timing of making the announcement is, for example,
The timing means may be provided, and the means for making the announcement may include means for setting the predetermined timing as a constant time interval based on the timing means.

Alternatively, the announcement means may include means for setting the predetermined timing as a timing at which the monitoring result accumulated in the accumulation means is updated.

Alternatively, a means for measuring the time and a means for measuring the frequency with which the monitoring result accumulated in the means for accumulating are updated are provided, and the means for announcing the means for measuring the predetermined timing. When the measurement frequency exceeds the threshold value, a constant time interval based on the time measuring means is provided, and when the measurement frequency of the measuring means is less than or equal to the threshold value, the monitoring result accumulated in the accumulating means is updated. You can also

According to this, in a situation where the monitoring result is updated too frequently, a public notice is given at a certain time interval, and in a situation where the monitoring result is not updated frequently, it is updated. You can make a public announcement every time.
As a result, it is possible to carry out the announcement adaptively to changes in the resource status.

Alternatively, the means for making an announcement is a resource in which the state of air blocking of the means for converting the wavelength or the number of wavelength multiplexing of the output link is predetermined according to the monitoring results of the two means for monitoring the predetermined timing. It is also possible to provide a means for setting the timing to exceed or fall below at least one reference value of the usage ratio of.

According to this, in a situation where the resource usage rate is standard and it is not necessary to make a public announcement, no public announcement is made, and when the resource usage rate becomes nonstandard, a public announcement is made. By doing so, it is possible to reduce unnecessary public notices, reduce the processing load of each optical cross-connect device, and reduce the traffic for public notices, so that network resources can be effectively used.

A second aspect of the present invention is to divide a wavelength-division-multiplexed optical signal input from an input link and a single wavelength optical signal demultiplexed by the demultiplexing means into a predetermined wavelength. Means for switching to a route, means for wavelength-converting the single-wavelength optical signal in the switching process of the switching means, and light for single-wavelength output to the same output link switched by the switching means And a means for wavelength-multiplexing a signal, the means for wavelength conversion is provided in a smaller number than the maximum number of routes of the means for switching, and there is an upper limit on the maximum number of wavelengths that can be wavelength-multiplexed for one output link. It is an optical network including a plurality of provided optical cross-connect devices.

Here, the feature of the present invention resides in that the optical cross-connect device comprises means for monitoring the air-blocking condition of the wavelength converting means, and means for monitoring the wavelength multiplexing number of the output link. Based on the network topology information, the number of wavelength conversion units installed, and the maximum wavelength multiplexing number, which are common to a plurality of the optical cross-connect devices. Means for setting an optical path between the optical cross-connect devices is provided, and the means for setting the optical path refers to the monitoring result accumulated in the accumulating means between the optical cross-connect devices. There is a means for setting the optical path of.

The optical cross-connect device in this optical network has a means for demultiplexing the wavelength-multiplexed optical signal input from the input link, and a predetermined wavelength of the optical signal demultiplexed by the demultiplexing means. Means for switching to the path, a means for converting the wavelength of the optical signal of the single wavelength in the switching process of the switching means, and a single wavelength of the single wavelength output to the same output link switched by the switching means. A means for wavelength-multiplexing an optical signal and a means for setting an optical path based on a calculation result of an optical path setting route, wherein the wavelength converting means is provided in a smaller number than the maximum number of routes of the switching means. The maximum number of wavelengths that can be wavelength-multiplexed with respect to one output link is an optical cross-connect device having an upper limit.

Here, the feature of this optical cross-connect device is that it monitors the availability of the wavelength converting means, monitors the wavelength multiplex number of the output link, and provides a plurality of optical cross connections. An optical connection between the optical cross-connect devices based on the network topology information, the number of installed wavelength conversion devices, and the maximum number of wavelength division multiplexing, which are provided in common to the connection devices and accumulate the monitoring results of the monitoring devices. And a means for transmitting the monitoring result of the monitoring means to the means for calculating the path setting route.

The centralized control device in this optical network is characterized in that it has means for demultiplexing the wavelength-multiplexed optical signal inputted from the input link and a single demultiplexed means by this demultiplexing means. Means for switching an optical signal of a wavelength to a predetermined route, means for wavelength converting the optical signal of a single wavelength in the switching process of this switching means, and output to the same output link switched by the switching means A wavelength-multiplexing means for wavelength-multiplexing an optical signal of a single wavelength, and means for setting an optical path based on the calculation result of the optical path setting path, wherein the wavelength converting means is the maximum number of routes of the switching means. The maximum number of wavelengths that can be wavelength-multiplexed for one output link is provided with an upper limit, and the number of wavelength conversion means Means for monitoring a busy status, provided in an optical network comprising a plurality of optical cross-connect device and means for monitoring the number of multiplexed wavelengths of said output links,
A means for accumulating the monitoring result of the means for monitoring common to a plurality of the optical cross-connect devices, and the optical cross based on the topology information of the network, the number of installed wavelength converting means, and the maximum number of wavelength multiplexing. And a means for calculating an optical path setting path between the connecting devices, wherein the calculating means refers to the monitoring result accumulated in the accumulating means, and the optical path setting route between the optical cross connecting devices. It is the place where the means to calculate is provided.

Alternatively, a second aspect of the present invention is to provide means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and an optical signal having a single wavelength demultiplexed by the demultiplexing means. A means for switching to a predetermined route, a means for wavelength converting the optical signal of the single wavelength in the switching process of the switching means, and a single wavelength output to the same output link switched by the switching means Means for wavelength-multiplexing the optical signal of, the means for wavelength conversion is provided less than the maximum number of routes of the switching means, the maximum wavelength multiplexing number that can be wavelength-multiplexed for one output link An upper limit is provided, and the optical cross connect is based on network topology information, the number of wavelength conversion means installed, and the maximum number of wavelength division multiplexing. An optical network comprising a plurality of optical cross-connect device and means for setting the optical path between location another.

Here, a feature of the present invention is that the optical cross-connect device comprises means for monitoring the air-blocking condition of the wavelength converting means, and means for monitoring the wavelength multiplexing number of the output link. And a means for accumulating the monitoring result of the monitoring means is provided in common to a plurality of the optical cross-connect devices, and the means for setting the optical path is the monitoring means accumulated in the accumulating means. There is provided means for setting an optical path between the optical cross-connect devices by referring to the result.

The optical cross-connect device in this optical network has a means for demultiplexing the wavelength-multiplexed optical signal inputted from the input link, and a predetermined wavelength of the optical signal demultiplexed by the demultiplexing means. Means for switching to the path, a means for converting the wavelength of the optical signal of the single wavelength in the switching process of the switching means, and a single wavelength of the single wavelength output to the same output link switched by the switching means. Means for wavelength-multiplexing optical signals, means for calculating optical path setting paths between the optical cross-connect devices based on network topology information, the number of wavelength converting means installed, and the maximum number of wavelength multiplexing, and this calculation Means for setting an optical path based on the calculation result of the switching means, Maximum number of routes less provided as compared to the means of an optical cross-connect device limit is provided for the maximum number of multiplexed wavelengths that can be wavelength-multiplexed for one output link.

Here, the feature of this optical cross-connect device is that it monitors the availability of the wavelength converting means, monitors the number of wavelength multiplexes of the output link, and has a plurality of optical cross connections. And a means for transmitting the monitoring result of the monitoring means to a means provided in common to the connecting device for accumulating the monitoring result of the monitoring means.

The centralized control device in this optical network is characterized in that it has means for demultiplexing the wavelength-multiplexed optical signal inputted from the input link and a single demultiplexed means by this demultiplexing means. Means for switching an optical signal of a wavelength to a predetermined route, means for wavelength converting the optical signal of a single wavelength in the switching process of this switching means, and output to the same output link switched by the switching means Means for wavelength-multiplexing an optical signal of a single wavelength, an optical path setting path between the optical cross-connect devices based on network topology information, the number of wavelength conversion means installed, and the maximum number of wavelength multiplexing And a means for setting an optical path based on the calculation result of the calculating means, wherein the means for wavelength conversion is The number is smaller than the maximum number of routes of the switching means, the maximum wavelength multiplexing number that can be wavelength-multiplexed with respect to one output link is provided with an upper limit, and means for monitoring the air blocking status of the wavelength converting means. A monitoring result of the monitoring means provided in an optical network including a plurality of optical cross-connect devices having a means for monitoring the number of wavelength division multiplexes of the output links, common to a plurality of the optical cross-connect devices. Is provided where a means for accumulating is stored.

The former centrally manages the usage of link resources and wavelength conversion resources as well as the setting of optical paths, while the latter centrally manages link resources and wavelength resources, but Paths are set by each optical cross-connect device in an autonomous distributed manner.

The means for monitoring the vacancy status of the wavelength converting means comprises means for monitoring the unused number and the used number of the wavelength converting means, and the means for monitoring the wavelength multiplexing number of the output link is , A means for monitoring the number of unused wavelengths and the number of used wavelengths of the output link.

Alternatively, the means for monitoring the vacancy status of the wavelength converting means comprises means for monitoring the availability ratio obtained by dividing the unused number of the wavelength converting means by the total number, and wavelength multiplexing the output link. The means for monitoring the number may also comprise means for monitoring a usable rate obtained by dividing the maximum wavelength multiplexing number of the output link by the number of unused wavelengths.

Alternatively, the means for monitoring the air-blocking status of the wavelength converting means comprises means for monitoring the unusable rate obtained by dividing the number of used wavelength converting means by the total number, and the wavelength of the output link. The means for monitoring the number of multiplexes can also comprise means for monitoring an unusable rate obtained by dividing the maximum number of wavelength multiplexes of the output link by the number of used wavelengths.

Further, the wavelength converting means may include a wavelength converting trunk connected to a part of the output port and a part of the input port of the switching means. As a result, the number of wavelength conversion means required can be reduced as compared with the case where wavelength conversion means is arranged at all ports. Furthermore, by making the convertible wavelength of the wavelength converting means variable, the number of required wavelength converting means can be further reduced.

Alternatively, the wavelength converting means may be inserted between the demultiplexing means and the switching means. As a result, compared with the above-mentioned trunk system, it is not necessary to allocate some ports of the switching means for the trunk, so that all the ports can be effectively used. Also in this case, the number of required wavelength converting means can be reduced by making the convertible wavelength of the wavelength converting means variable.

Alternatively, the wavelength converting means may be inserted between the switching means and the multiplexing means. Thus, by switching the switching means, any route can be connected to the wavelength conversion means, so that the wavelength conversion can be performed flexibly. In this case, since the wavelength of the output route to which the wavelength converting means is connected is uniquely determined, the convertible wavelength may be fixed, and the wavelength converting means can be configured at low cost.

Alternatively, the wavelength converting means may be inserted between the demultiplexing means and the switching means and between the switching means and the multiplexing means, respectively. As a result, wavelength conversion can be performed on both the input route and the output route, and the wavelength conversion can be performed flexibly. In this case, the convertible wavelength of the wavelength conversion means interposed between the demultiplexing means and the switching means is made variable, and the wavelength conversion is performed between the switching means and the multiplexing means. The convertible wavelength of the means is preferably fixed.

Alternatively, the wavelength converting means is interposed between the switching means and the multiplexing means, and further connected to a part of the output and a part of the input of the switching means. A wavelength conversion trunk can also be provided. If this configuration is applied when there are a large number of routes or when it is desired to increase the number of wavelengths that can be wavelength-converted, the demand can be satisfied with a relatively small number of wavelength conversion means installed.

A third aspect of the present invention is, when installed in an information processing device, a function of demultiplexing a wavelength-multiplexed optical signal input from the input link into the information processing device, and this demultiplexing. By the function of switching the single wavelength optical signal demultiplexed by the function to a predetermined route, the function of wavelength converting the single wavelength optical signal in the switching process of this switching function, and the switching function. And a function of wavelength-multiplexing a single-wavelength optical signal output to the same switched output link, wherein the wavelength conversion function is provided less than the maximum number of routes of the switching function. There is an upper limit to the maximum number of wavelengths that can be wavelength-multiplexed for one output link. Network topology information and the number of wavelength conversion functions installed. And a function of calculating an optical path setting route from the own optical cross-connect device to another optical cross-connect device based on the maximum wavelength multiplexing number, and a function of setting an optical path based on the calculation result of this calculating function. It is a program that realizes the functions applied to the optical cross connect device.

Here, the feature of the present invention lies in the function of monitoring the air-blocking condition of the wavelength converting means, the function of monitoring the number of wavelength multiplexes of the output link, and the function of monitoring these. As a function of realizing a function of accumulating a monitoring result and calculating the optical path setting route, referring to the monitoring result accumulated in the accumulating function, a self optical cross-connect device to another optical cross-connect device This is to realize the function of calculating the optical path setting route and to realize the function of notifying the other optical cross-connect device of the monitoring result accumulated in the accumulating function at a predetermined timing.

As a function of realizing the timekeeping function and making the announcement, it is possible to realize a function of setting the predetermined timing to a constant time interval based on the timekeeping function.

Alternatively, the function of making the predetermined timing the update timing of the monitoring result stored in the storing function can be realized as the function of the announcement.

Alternatively, a function of measuring the predetermined timing is implemented as a function of realizing a time measuring function and a function of measuring a frequency of updating the monitoring result accumulated in the accumulating function. When the measurement frequency exceeds a threshold value, a fixed time interval based on the timekeeping function is set, and when the measurement frequency of the function to be measured is less than or equal to the threshold value, the function of setting the timing at which the monitoring result accumulated in the function to be accumulated is updated is realized. You can also

Alternatively, as the advertised function, a resource in which the air-blocking status of the wavelength converting function or the wavelength multiplexing number of the output link is predetermined according to the monitoring results of the two monitoring functions for the predetermined timing. It is also possible to realize the function of setting the timing of exceeding or falling below at least one reference value of the usage ratio of.

Alternatively, a third aspect of the present invention is to install the information processing apparatus and demultiplex the wavelength-multiplexed optical signal input from the input link into the information processing apparatus, and to divide this function. A function of switching an optical signal of a single wavelength demultiplexed by the wave function to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of the switching function, and the switching The function of wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the function, and the function of setting the optical path based on the calculation result of the optical path setting route, the function of wavelength conversion is In comparison with the maximum number of routes of the switching function, a smaller number is provided, and an upper limit is provided for the maximum number of wavelengths that can be wavelength-multiplexed for one output link. The is a program for realizing functions corresponding to the optical cross-connect device.

Here, the feature of the present invention resides in that the function of monitoring the air-blocking condition of the wavelength converting means, the function of monitoring the wavelength multiplexing number of the output link, and the function of a plurality of optical cross-connect devices are provided. An optical path setting path between the optical cross-connect devices based on the network topology information, the number of installed wavelength conversion functions, and the maximum number of wavelength division multiplexing, which are provided in common for the monitoring functions and accumulate the monitoring results. The function of transmitting the monitoring result of the monitoring function with respect to the function of calculating

Alternatively, a third aspect of the present invention is to install the information processing apparatus in order to demultiplex the wavelength-multiplexed optical signal input from the input link to the information processing apparatus, and to divide this function. A function of switching an optical signal of a single wavelength demultiplexed by the wave function to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of the switching function, and the switching The function of wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the function, and the function of setting the optical path based on the calculation result of the optical path setting route, the function of wavelength conversion is , The number is smaller than the maximum number of routes of the switching means, and there is an upper limit on the maximum number of wavelengths that can be wavelength-multiplexed for one output link. A centralized control device provided in an optical network having a plurality of optical cross-connect devices each having a function of monitoring the availability of the wavelength conversion function and a function of monitoring the wavelength multiplexing number of the output link. It is a program that realizes the corresponding function.

Here, a feature of the present invention is that a function of accumulating a monitoring result of the function to be monitored is commonly used for a plurality of the optical cross-connect devices, network topology information, and the wavelength conversion. The function of calculating an optical path setting route between the optical cross-connect devices based on the number of installed functions and the maximum number of wavelength division multiplexing, and the monitoring result accumulated in the function to be accumulated as the calculating function. The function for calculating the optical path setting route between the optical cross-connect devices is realized by referring to

Alternatively, a third aspect of the present invention is a function of installing a wavelength-multiplexed optical signal in the information processing apparatus by installing the wavelength-multiplexed optical signal into the information processing apparatus, and a function of demultiplexing the wavelength-multiplexed optical signal. A function of switching an optical signal of a single wavelength demultiplexed by the wave function to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of the switching function, and the switching A function of wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the function, and the optical cross-connect based on network topology information and the number of wavelength conversion functions installed and the maximum number of wavelength multiplexing It has a function to calculate the optical path setting route between devices and a function to set the optical path based on the calculation result of this calculation function. In the optical cross-connect device, the wavelength converting function is provided in a smaller number than the maximum number of routes of the switching function, and the maximum number of wavelengths that can be wavelength-multiplexed for one output link is limited. It is a program that realizes the corresponding function.

Here, the features of the present invention are that the function of monitoring the air-blocking condition of the function of wavelength conversion, the function of monitoring the number of wavelength division multiplexing of the output link, and the function of a plurality of optical cross-connect devices On the other hand, the function of transmitting the monitoring result of the monitoring function to the function of commonly providing the monitoring result of the monitoring function is realized.

Alternatively, a third aspect of the present invention is a function of demultiplexing a wavelength-multiplexed optical signal input from an input link to the information processing device by installing the information processing device, and a function for demultiplexing the function. A function of switching an optical signal of a single wavelength demultiplexed by the wave function to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of the switching function, and the switching A function of wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the function, and the optical cross-connect based on network topology information and the number of wavelength conversion functions installed and the maximum number of wavelength multiplexing It has a function to calculate the optical path setting route between devices and a function to set the optical path based on the calculation result of this calculation function. The wavelength converting function is provided less than the maximum number of routes of the switching function, and the maximum wavelength multiplexing number that can be wavelength-multiplexed with respect to one output link is provided with an upper limit. A program for realizing a function corresponding to a centralized control device provided in an optical network including a plurality of optical cross-connect devices having a function of monitoring the air-blocking status of the output link and a function of monitoring the wavelength multiplexing number of the output link. Is.

Here, the feature of the present invention resides in that a function of accumulating a monitoring result of the function to be monitored is realized commonly to a plurality of the optical cross-connect devices.

As a function of monitoring the availability of the wavelength converting function, a function of monitoring the unused number and the used number of the wavelength converting function is realized, and a function of monitoring the wavelength multiplexing number of the output link. As a result, a function of monitoring the number of unused wavelengths and the number of used wavelengths of the output link can be realized.

Alternatively, as a function of monitoring the air-blocking status of the wavelength converting function, a function of monitoring the availability ratio by dividing the unused number of the wavelength converting function by the total number is realized, and the wavelength of the output link is realized. As a function of monitoring the number of multiplexed signals, it is possible to realize a function of monitoring the availability ratio by dividing the maximum number of multiplexed wavelengths of the output link by the number of unused wavelengths.

Alternatively, as a function of monitoring the air-blocking status of the wavelength converting function, a function of monitoring the unusable rate by dividing the number of used wavelength converting functions by the total number is realized, and the output link As a function of monitoring the number of multiplexed wavelengths, a function of monitoring the unusable rate by dividing the maximum number of multiplexed wavelengths of the output link by the number of used wavelengths can be realized.

A fourth aspect of the present invention is a recording medium readable by the information processing device, in which the program of the present invention is recorded. By recording the program of the present invention on the recording medium of the present invention, the information processing apparatus can install the program of the present invention using this recording medium. Alternatively, the program of the present invention can be installed in the information processing apparatus directly from a server holding the program of the present invention via a network.

As a result, the information processing device such as a computer device adaptively changes the cost given to the wavelength conversion and the link, so that the wavelength conversion resource of the specific node and the link between the nodes are intensively used. An optical cross-connect device, a centralized control device and an optical network that can be avoided can be realized.

[0057]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) An optical cross-connect device and an optical network according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a conceptual diagram of an autonomous distributed network according to the first embodiment. FIG. 2 is a block diagram of the optical cross-connect device of the first embodiment. Figure 3
FIG. 3 is a detailed configuration diagram of the optical cross-connect device of the first embodiment.

The first embodiment is an embodiment of the optical cross-connect device arranged in the autonomous distributed network as shown in FIG. 1, and as shown in FIG. Demultiplexing device 10 for demultiplexing optical signal
A switch 3 for switching a single-wavelength optical signal demultiplexed by the demultiplexing device 10 to a predetermined route; and a wavelength conversion for wavelength-converting the single-wavelength optical signal in the switching process of the switch 3. The wavelength conversion device 4 includes a device 4 and a multiplexer 12 that wavelength-multiplexes a single-wavelength optical signal output to the same output link switched by the switch 3, and the wavelength converter 4 compares the maximum number of routes of the switch 3. The maximum number of wavelengths that can be wavelength-multiplexed for one output link is limited, and the network topology information recorded in the network topology database 8 and the number of wavelength conversion devices 4 installed and the maximum number are set. An optical cross connector including a path calculation unit 6 for setting an optical path from the own optical cross connect device to another optical cross connect device based on the number of wavelength division multiplexing. Transfected device is 1-1.

Here, the features of the first embodiment are that the wavelength conversion resource usage status monitoring device 5 for monitoring the air-blocking status of the wavelength conversion device 4 and the controller 2 for monitoring the wavelength multiplexing number of the output link. And a link resource / wavelength conversion resource database 7 for accumulating the monitoring results of the wavelength conversion resource usage monitoring device 5 and the controller 2, and the route calculation unit 6 stores the link resource / wavelength conversion resource database 7 in the link resource / wavelength conversion resource database 7. An optical path from the own optical cross-connect device to another optical cross-connect device is set by referring to the accumulated monitoring result, and the link resource / wavelength conversion resource database 7 sets the accumulated monitoring result at a predetermined timing. The other optical cross-connect equipment will be announced.

As for the timing of making the announcement, one of the following timing settings is adopted. (1) A timer 9 is provided, and the link resource / wavelength conversion resource / database 7 sets the predetermined timing as a constant time interval based on the timer 9. (2) The link resource / wavelength conversion resource / database 7 sets the predetermined timing as the timing at which the monitoring result accumulated in itself is updated. (3) A timer 9 is provided, and the link resource / wavelength conversion resource database 7 measures the frequency with which the monitoring result accumulated in itself is updated, and the frequency measurement result exceeds the threshold value at the predetermined timing. Sometimes, it is set as a fixed time interval based on the timer 9, and when the frequency measurement result is less than or equal to the threshold value, it is the timing at which the monitoring result accumulated in itself is updated. (4) The link resource / wavelength conversion resource / database 7 sets the predetermined timing according to the monitoring results of the wavelength conversion resource usage monitoring device 5 and the controller 2 to determine whether the wavelength conversion device 4 is occupied or blocked, or wavelength-multiplexes the output link. It is the timing when the number exceeds or falls below at least one reference value of the predetermined resource usage rate.

As a monitoring result output method, any one of the following methods is adopted. (1) The wavelength conversion resource usage status monitoring device 5 monitors the number of unused wavelengths and the number of used wavelengths of the wavelength conversion device 4, and the controller 2 monitors the number of unused wavelengths and the number of used wavelengths of the output link. (2) The wavelength conversion resource usage status monitoring device 5 monitors the availability ratio obtained by dividing the unused number of the wavelength conversion devices 4 by the total number, and the controller 2 sets the maximum wavelength multiplexing number of the output link to the unused wavelength number. Monitor the availability divided by. (3) The wavelength conversion resource usage monitoring device 5 monitors the unusable rate obtained by dividing the number of used wavelength conversion devices 4 by the total number, and the controller 2 determines the maximum number of wavelength multiplexing of the output link as the used wavelength. Monitor the unavailable rate divided by a number.

The first embodiment will be described in more detail below.

The first embodiment is an autonomous distributed network as shown in FIG.
1, the controller 2, the switch 3, the wavelength conversion device 4, the wavelength conversion resource usage monitoring device 5, the route calculation unit 6, the link resource / wavelength conversion resource database 7, the network topology, A database 8 is provided.

The controller 2 controls the switch 3 to switch the optical signal input from the input link to a predetermined output link. As shown in FIG. 3, each of the input link and the output link is a wavelength multiplexing link, the input link is provided with the demultiplexing device 10, and the output link is provided with the multiplexing device 12. In addition, in the switch 3, wavelength conversion is performed by the wavelength conversion device 4 as necessary.

In the first embodiment, the wavelength converter (TuWC
4 is provided as a wavelength conversion trunk in a part of the output path and a part of the input path of the switch 3, and the optical signal passes through the wavelength conversion trunk according to the switching of the switch 3 Wavelength conversion is applied to. As a result, the number of wavelength conversion devices 4 required can be reduced compared to the case where the wavelength conversion devices 4 are arranged at all ports. In addition, the wavelength conversion device 4 can variably perform wavelength conversion in order to convert to an arbitrary wavelength.

At this time, the wavelength conversion resource usage status monitoring device 5 monitors the air-blocking status of the wavelength conversion device 4 and stores the monitoring result in the link resource / wavelength conversion resource database 7.

Further, when controlling the switching of the switch 3, the controller 2 also monitors the wavelength multiplexing status of the output link and stores the monitoring result in the link resource / wavelength conversion resource database 7.

The route calculation unit 6 calculates an optical path based on the network topology information recorded in the network topology database 8 in advance and the monitoring results accumulated in the link resource / wavelength conversion resource database 7. This calculation result is notified to the controller 2, and the controller 2 sets an optical path based on this calculation result.

The contents of the link resource / wavelength conversion resource / database 7 are announced to the other optical cross-connect device at the timing already described. The timer 9 is used to set the announcement timing.

(Second Embodiment) A second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a conceptual diagram of the centralized management type network of the second embodiment. FIG. 5 is a block configuration diagram of the optical cross-connect device and the centralized control device of the second embodiment. The detailed configuration of the optical cross-connect device is the same as that of FIG. 3 shown in the first embodiment.

The second embodiment is an embodiment of a centralized control type optical network provided with an optical cross-connect device 1-2 and a centralized control device 20 as shown in FIG. 4, and as shown in FIG. A demultiplexing device 10 for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a switch 3 for switching an optical signal of a single wavelength demultiplexed by the demultiplexing device 10 to a predetermined route, In the switching process of the switch 3, a wavelength converter 4 for wavelength-converting the single-wavelength optical signal and a multiplexer for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switch 3. 12, the number of wavelength conversion devices 4 is smaller than the maximum number of routes of the switch 3, and the maximum number of wavelengths that can be wavelength-multiplexed with respect to one output link is provided with an upper limit. An optical network having a plurality of OPTO device 1-2.

Here, the feature of the second embodiment is that the wavelength conversion device 4 is included in the optical cross-connect device 1-2.
A plurality of optical cross-connect devices 1-2, each of which is provided with a wavelength conversion resource usage condition monitoring device 5 for monitoring the free / busy status of the
Common to the wavelength conversion resource usage monitoring device 5
And based on the link resource / wavelength conversion resource database 7 for accumulating the monitoring results of the controller 2 and the network topology information recorded in the network topology database 8 and the number of wavelength conversion devices 4 installed and the maximum number of wavelength multiplexing. Optical cross connect device 1
-2 is provided with a route calculation unit 6 for setting an optical path between them, and the route calculation unit 6 refers to the monitoring result stored in the link resource / wavelength conversion resource / database 7 to refer to the optical cross-connect device 1 -It is about setting the optical path between the two.

In other words, in the optical cross-connect device 1-2 of the second embodiment, by accessing the centralized control device 20, the use status of its own wavelength conversion resource and link resource is displayed in the link resource / wavelength conversion resource database 7 Accumulate in.

In the second embodiment, the route calculation unit 6 is also provided in the centralized control device 20, and the route calculation unit 6 stores the network topology information and the link resources recorded in the network topology database 8. By referring to the link resource and the wavelength conversion resource usage status accumulated in the wavelength conversion resource database 7, the optical paths between the optical cross-connect devices 1-2 are centrally set.

(Third Embodiment) FIGS. 6 and 7 show an optical network and an optical cross-connect device according to a third embodiment of the present invention.
Will be described with reference to. FIG. 6 is a conceptual diagram of the optical network of the third embodiment. FIG. 7 is a block diagram of the optical cross-connect device and the centralized control device of the third embodiment. The detailed configuration of the optical cross connect device is the same as that of FIG. 3 of the first embodiment.

The third embodiment is an embodiment of the optical network provided with the optical cross-connect device 1-3 and the centralized control device 21 as shown in FIG. 6, and is input from the input link as shown in FIG. Demultiplexing device 10 for demultiplexing the wavelength-multiplexed optical signal, switch 3 for switching the optical signal of a single wavelength demultiplexed by this demultiplexing device 10 to a predetermined route, and switch 3 A wavelength converter 4 for wavelength-converting the single-wavelength optical signal in a switching process, and a multiplexer 12 for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switch 3. The number of wavelength conversion devices 4 is smaller than the maximum number of routes of the switch 3, and the maximum number of wavelengths that can be wavelength-multiplexed for one output link is limited. A path calculator 6 for setting an optical path between the optical cross-connect devices 1-3 based on the network topology information recorded in the database 8, the number of wavelength converters 4 installed and the maximum number of wavelength division multiplexing. An optical network including a plurality of optical cross-connect devices 1-3.

The feature of the third embodiment is that the optical cross-connect device 1-3 includes the wavelength conversion device 4
A plurality of optical cross-connect devices 1-3, each of which is provided with a wavelength conversion resource usage status monitoring device 5 for monitoring the air-blocking status of
Common to the wavelength conversion resource usage monitoring device 5
And a link resource / wavelength conversion resource / database 7 for accumulating the monitoring results of the controller 2,
The route calculation unit 6 uses link resources, wavelength conversion resources,
The optical path between the optical cross-connect devices 1-3 is set with reference to the monitoring result accumulated in the database 7.

That is, in the optical cross-connect device 1-3 of the third embodiment, by accessing the centralized control device 20, the use status of the wavelength conversion resource and the link resource of its own is shown in the link resource / wavelength conversion resource database 7 And the usage status of the wavelength resource and the link resource in the other optical cross-connect device 1-2 is grasped.

In the third embodiment, the route calculator 6 is provided in each optical cross-connect device 1-3, and each optical cross-connect device 1-3 autonomously disperses the setting of the optical path.

(Fourth Embodiment) An optical cross-connect device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a block diagram of the optical cross-connect device of the fourth embodiment. In FIG. 8, the configurations of the switch 3, the wavelength conversion device (illustrated as TuWC) 4, and the wavelength conversion resource usage status monitoring device 5 are shown in detail, and the other parts are omitted.

In the fourth embodiment, the wavelength conversion device 4 is inserted in an arbitrary wavelength path between the demultiplexing device 10 and the switch 3. In this case, it is not necessary to allocate some ports of the switch 3 for trunks as compared with the trunk system of the first embodiment, so that all ports can be effectively used. In the fourth embodiment, the convertible wavelength of the wavelength conversion device 4 is variable.

(Fifth Embodiment) An optical cross-connect device according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a block diagram of the optical cross-connect device of the fifth embodiment. In FIG. 9, the configurations of the switch 3, the wavelength conversion device 40, and the wavelength conversion resource usage status monitoring device 5 are shown in detail, and the other parts are omitted.

In the fifth embodiment, the wavelength converter (WC and shown) 40 is inserted in an arbitrary wavelength path between the switch 3 and the multiplexer 12. In the configuration of the fourth embodiment shown in FIG. 8, wavelengths other than the wavelength path in which the wavelength conversion device 4 is arranged cannot be converted into the wavelength of the wavelength path in which the wavelength conversion device 4 is arranged. This is possible with the configuration of the fifth embodiment shown in FIG.

Further, at this time, in the circuit ahead of the wavelength conversion device 40, only a certain fixed wavelength can be made incident, so that the wavelength conversion device 40 only requires fixed wavelength conversion resources, which leads to cost reduction. .

(Sixth Embodiment) An optical cross-connect device according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10 is a block diagram of the optical cross-connect device of the sixth embodiment. In FIG. 10, the switch 3, the wavelength conversion devices 4, 4,
0, the configuration of the wavelength conversion resource usage monitoring device 5 is shown in detail, and the other parts are omitted.

In the sixth embodiment, the wavelength conversion device 4 is inserted in an arbitrary wavelength path between the demultiplexing device 10 and the switch 3 and between the switch 3 and the multiplexing device 12. Figure 9
Although the wavelength of the wavelength path in which the wavelength conversion device 40 is arranged cannot be converted to any other wavelength in the configuration of the fifth embodiment shown in FIG. 10, this is possible in the configuration of FIG.
The wavelength conversion device (TuWC and shown) 4 is a variable wavelength conversion resource, and the wavelength conversion device (WC and shown) 40 is a fixed wavelength conversion resource.

(Seventh Embodiment) An optical cross-connect device according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 11 is a block diagram of the optical cross-connect device of the seventh embodiment. In FIG. 11, the switch 3, the wavelength conversion devices 4, 4,
0, the configuration of the wavelength conversion resource usage monitoring device 5 is shown in detail, and the other parts are omitted.

In the seventh embodiment, a wavelength conversion device (WC and shown) 40 which is a fixed wavelength conversion resource is arranged between the switch 3 and the multiplexer 12, and a wavelength conversion device (TuWC) which is a variable wavelength conversion resource. 4) is implemented as a wavelength conversion trunk.

If the configuration of the seventh embodiment is applied when there are a large number of routes or when it is desired to increase the number of wavelengths capable of wavelength conversion, the demand can be satisfied with a relatively small number of wavelength conversion devices 4. it can.

(Eighth Embodiment) A demultiplexing device 10 for demultiplexing a wavelength-multiplexed optical signal input from an input link into the computer device which is an information processing device by installing the demultiplexing device 10 into the computer device. Demultiplexer 10
The switch 3 for switching the optical signal of the single wavelength demultiplexed by the switch to a predetermined route, the wavelength conversion device 4 for converting the wavelength of the optical signal of the single wavelength in the switching process of the switch 3, and the switch 3. And a multiplexer 12 for wavelength-multiplexing a single-wavelength optical signal output to the same switched output link, and the wavelength converter 4 is provided in a smaller number than the maximum number of routes of the switch 3. An upper limit is set for the maximum number of wavelengths that can be wavelength-multiplexed for one output link. Based on the network topology information, the number of wavelength converters 4 installed, and the maximum number of wavelengths multiplexed, the own optical cross-connect device is switched to another optical cross-connect device. Of the optical path setting section 6 for calculating the optical path setting path of the optical path and the controller 2 for setting the optical path based on the calculation result of the optical path setting section 6. By installing a program for realizing the functions to be applied to the cross-connect device to the computer device may be a device corresponding to the computer system in the optical cross connect apparatus of the first embodiment.

The features of the program of this embodiment are that the function corresponding to the wavelength conversion resource use status monitoring device 5 as a function of monitoring the air-blocking status of the wavelength conversion device 4 and the wavelength multiplexing number of the output link are monitored. As a function, a function corresponding to the controller 2 is realized, and the controller 2
And a function corresponding to the link resource / wavelength change resource / database 7 for accumulating the monitoring result of the function corresponding to the wavelength conversion resource use status monitoring device 5, and the link resource / wavelength as a function corresponding to the route calculation unit 6 is realized. The function for calculating the optical path setting route from the own optical cross-connect device to another optical cross-connect device is realized by referring to the monitoring result accumulated in the function corresponding to the conversion resource database 7, and the link resource / wavelength conversion is performed. This is to realize a function of notifying the other optical cross-connect device of the monitoring result accumulated in the resource database 7 at a predetermined timing.

Further, a timer function corresponding to the timer 9 is realized, and a function of making the predetermined timing a constant time interval based on the timer function is realized as the function of the announcement.

Alternatively, the function of making the predetermined timing the update timing of the monitoring result stored in the link resource / wavelength conversion resource database 7 is realized as the function of the announcement.

Alternatively, a timer function corresponding to the timer 9 and a function of measuring the frequency with which the monitoring result stored in the link resource / wavelength resource database 7 is updated are realized, and the notification function is When the measurement frequency of the measuring function exceeds a threshold at a predetermined timing, it is set as a fixed time interval based on the clocking function, and when the measurement frequency of the measuring function is equal to or less than a threshold, the monitoring result accumulated in the accumulating function is updated. Realize the function to be the timing.

Alternatively, as the function of making the announcement, the predetermined timing may be set in advance according to the monitoring results of the controller 2 and the wavelength conversion resource usage monitoring device 5 to determine whether the wavelength converter 4 is in the air-blocked state or the number of wavelength multiplexing of the output link. A function is implemented to make the timing of exceeding or falling below at least one reference value of the use ratio of the determined resource.

Alternatively, by installing in a computer device, a demultiplexing device 10 for demultiplexing a wavelength-multiplexed optical signal input from the input link to the computer device, and demultiplexing by the demultiplexing device 10 are provided. A switch 3 for switching an optical signal of a single wavelength to a predetermined route
A wavelength conversion device 4 for converting the wavelength of the single-wavelength optical signal in the switching process of the switch 3;
The wavelength conversion device is provided with a multiplexer 12 that wavelength-multiplexes an optical signal of a single wavelength output to the same output link switched by the optical switch, and a controller 2 that sets an optical path based on the calculation result of the optical path setting route. 4 is a program that realizes a function corresponding to an optical cross-connect device in which a smaller number is provided as compared with the maximum number of routes of the switch 3, and an upper limit is provided in the maximum number of wavelengths that can be wavelength-multiplexed for one output link. By installing in the computer device, the computer device can be made to correspond to the optical cross-connect device of the second embodiment.

The features of the program of this embodiment are that the function corresponding to the wavelength conversion resource use status monitoring device 5 for monitoring the air-blocking condition of the wavelength conversion device 4 and the wavelength multiplexing number of the output link are monitored. The function corresponding to the controller 2 and the monitoring result of the function commonly provided for a plurality of optical cross-connect devices are accumulated to accumulate network topology information, the number of wavelength converters 4 installed, and the maximum number of wavelength division multiplexing. The function of transmitting the monitoring result of the monitoring function to the function of calculating the optical path setting route between the optical cross-connect devices based on the above.

Alternatively, by installing in the computer device, the wavelength-multiplexed optical signal input from the input link is input to the computer device 10.
A switch 3 for switching a single-wavelength optical signal demultiplexed by the demultiplexing device 10 to a predetermined route; and a wavelength conversion for wavelength-converting the single-wavelength optical signal in the switching process of the switch 3. A device 4, a multiplexer 12 for wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the switch 3, and a controller 2 for setting an optical path based on the calculation result of the optical path setting route.
The number of wavelength conversion devices 4 is smaller than the maximum number of routes of the switch 3, and the maximum number of wavelengths that can be wavelength-multiplexed with respect to one output link is provided with an upper limit. Corresponding to a centralized control device provided in an optical network including a plurality of optical cross-connect devices including a wavelength conversion resource usage status monitoring device 5 for monitoring the blocking status and a controller 2 for monitoring the wavelength multiplexing number of the output link. By installing a program for realizing the function described above in a computer device, the computer device can be made to correspond to the centralized control device of the second embodiment.

The feature of the program of this embodiment is that the controller 2 and the wavelength conversion resource usage status monitoring device 5 are commonly used for a plurality of optical cross-connect devices.
A function corresponding to the link resource / wavelength conversion resource / database 7 for accumulating the monitoring results of the optical path, the optical path between the optical cross-connect devices based on the network topology information, the number of wavelength conversion devices 4 installed, and the maximum number of wavelength multiplexing. A function corresponding to the route calculation unit 6 for calculating the set route is realized, and as the function corresponding to the route calculation unit 6, the monitoring result accumulated in the function corresponding to the link resource / wavelength conversion resource database 5 is referred to. Then, the function of calculating the optical path setting route between the optical cross-connect devices is realized.

Alternatively, by installing in a computer device, the demultiplexing device 10 for demultiplexing the wavelength-multiplexed optical signal input from the input link to the computer device, and the demultiplexing device 10 demultiplexing A switch 3 for switching an optical signal of a single wavelength to a predetermined route
A wavelength conversion device 4 for converting the wavelength of the single-wavelength optical signal in the switching process of the switch 3;
A multiplexer 12 for wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the optical cross-connect based on network topology information, the number of wavelength converters 4 installed, and the maximum number of wavelength multiplexing. The wavelength conversion device 4 has a function corresponding to the route calculation unit 6 for calculating the optical path setting route between the devices and a function corresponding to the controller 2 for setting the optical path based on the calculation result of the calculation function. , A computer device having a program that realizes a function corresponding to an optical cross-connect device in which the number of switches provided is smaller than the maximum number of routes and the maximum number of wavelengths that can be wavelength-multiplexed for one output link is limited. Installed in the computer, it becomes a device corresponding to the optical cross-connect device of the third embodiment. It is possible.

The features of the program of this embodiment are that the function corresponding to the wavelength conversion resource use status monitoring device 5 for monitoring the air-blocking condition of the wavelength conversion device 4 and the wavelength multiplexing number of the output link are monitored. The function corresponding to the controller 2 and the function corresponding to the link resource / wavelength conversion resource / database 7 that is commonly provided for a plurality of optical cross-connect devices and accumulates the monitoring results of the function to be monitored are monitored. It is to realize the function of transmitting the monitoring result of the function.

Alternatively, by installing in a computer device, a demultiplexing device 10 for demultiplexing the wavelength-multiplexed optical signal input from the input link to the computer device, and demultiplexing by this demultiplexing device 10 are provided. A switch 3 for switching an optical signal of a single wavelength to a predetermined route
A wavelength conversion device 4 for converting the wavelength of the single-wavelength optical signal in the switching process of the switch 3;
A multiplexer 12 for wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the optical cross-connect based on network topology information, the number of wavelength converters 4 installed, and the maximum number of wavelength multiplexing. A path calculation unit 6 for calculating an optical path setting path between devices,
The wavelength conversion device 4 is provided with a controller 2 that sets an optical path based on the calculation result of the route calculation unit 6, and the number of wavelength conversion devices 4 is smaller than the maximum number of routes of the switch 3, and wavelength multiplexing can be performed for one output link. An upper limit is set for the maximum wavelength multiplexing number, and the optical cross is provided with a wavelength conversion resource usage monitoring device 5 for monitoring the air-blocking condition of the wavelength conversion device 4, and a controller 2 for monitoring the wavelength multiplexing number of the output link. By installing a program for realizing a function corresponding to a centralized control device provided in an optical network provided with a plurality of connecting devices into the computer device, the computer device becomes a device corresponding to the centralized control device of the third embodiment. be able to.

A feature of the program of the present embodiment is that a function of accumulating the monitoring result of the function to be monitored is realized commonly to a plurality of optical cross-connect devices.

As a function corresponding to the wavelength conversion resource usage status monitoring device 5 for monitoring the air-blocking status of the wavelength conversion device 4, a function of monitoring the number of unused wavelengths and the number of used wavelength conversion devices 4 is realized, and the output As a function corresponding to the controller 2 for monitoring the wavelength multiplexing number of the link, a function of monitoring the number of unused wavelengths and the number of used wavelengths of the output link is realized.

Alternatively, as a function corresponding to the wavelength conversion resource usage status monitoring device 5 for monitoring the air-blocking status of the wavelength conversion device 4, a function of monitoring the availability ratio obtained by dividing the number of unused wavelength conversion devices 4 by the total number. As a function corresponding to the controller 2 that monitors the wavelength multiplexing number of the output link, a function of monitoring the availability ratio obtained by dividing the maximum wavelength multiplexing number of the output link by the unused wavelength number is realized.

Alternatively, as a function corresponding to the wavelength conversion resource usage status monitoring device 5 for monitoring the air-blocking status of the wavelength conversion device 4, the unusable rate obtained by dividing the number of used wavelength conversion devices 4 by the total number is monitored. The function is realized, and as a function corresponding to the controller 2 that monitors the wavelength multiplexing number of the output link, a function of monitoring the unusable rate by dividing the maximum wavelength multiplexing number of the output link by the number of used wavelengths is realized. .

By recording the program of this embodiment on the recording medium of this embodiment, the computer device can install the program of this embodiment using this recording medium. Alternatively, the program of this embodiment can be directly installed in a computer device from a server holding the program of this embodiment via a network.

As a result, it is possible to adaptively change the cost given to the wavelength conversion and the link by the computer device, and to prevent the wavelength conversion resource of the specific node and the link between the nodes from being intensively used. An optical cross-connect device, a centralized control device, and an optical network can be realized.

[0109]

As described above, according to the present invention,
It is possible to adaptively change the wavelength conversion and the cost given to the link, and prevent the wavelength conversion resource of a specific node and the link between the nodes from being intensively used.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an autonomous distributed network according to a first embodiment.

FIG. 2 is a block configuration diagram of an optical cross-connect device according to a first embodiment.

FIG. 3 is a detailed configuration diagram of the optical cross-connect device according to the first embodiment.

FIG. 4 is a conceptual diagram of a centralized management type network according to a second embodiment.

FIG. 5 is a block configuration diagram of an optical cross-connect device and a centralized control device of a second embodiment.

FIG. 6 is a conceptual diagram of an optical network according to a third embodiment.

FIG. 7 is a block configuration diagram of an optical cross-connect device and a centralized control device of a third embodiment.

FIG. 8 is a block configuration diagram of an optical cross connect device of a fourth embodiment.

FIG. 9 is a block configuration diagram of an optical cross connect device of a fifth embodiment.

FIG. 10 is a block configuration diagram of an optical cross connect device of a sixth embodiment.

FIG. 11 is a block configuration diagram of an optical cross connect device of a seventh embodiment.

FIG. 12 is a block configuration diagram of a conventional optical cross-connect device and a centralized control device.

[Explanation of symbols]

1, 1-1 to 1-7 Optical cross connect device 2 controller 3 switches 4,40 Wavelength converter 5 Wavelength conversion resource usage monitoring device 6 Route calculator 7 Link resource, wavelength conversion resource, database 8 Network Topology Database 9 timer 10 demultiplexer 12 Multiplexing device 19, 20, 21 Centralized control device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoaki Yamanaka             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Honden Telephone Co., Ltd. F-term (reference) 5K002 BA05 BA06 DA02 DA09 EA05                 5K069 AA08 BA09 CB01 CB10 DB31                       EA24 EA26 FA21 FD01 FD11

Claims (32)

[Claims] 1. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching an optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength-converting the single-wavelength optical signal in the switching process of the switching means, and means for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switching means The number of the wavelength converting means is smaller than the maximum number of routes of the switching means, and the maximum wavelength multiplexing number that can be wavelength-multiplexed for one output link is provided with an upper limit. And from the own optical cross-connect device to another optical cross-connect device based on the number of wavelength conversion means installed and the maximum number of wavelength division multiplexing In the optical cross-connect device including means for calculating the optical path setting route of the optical path, and means for setting the optical path based on the calculation result of the calculating means, means for monitoring the air blocking status of the wavelength converting means, A means for monitoring the number of wavelength division multiplexes of the output link, and means for accumulating the monitoring results of the means for monitoring, wherein the means for calculating refers to the monitoring results accumulated in the means for accumulating. Then, a means for calculating an optical path setting path from the own optical cross-connect device to another optical cross-connect device is provided, and the monitoring result accumulated in the accumulating means is announced to the other optical cross-connect device at a predetermined timing. An optical cross connect device comprising means. 2. A time measuring means is provided, and the means for making an announcement comprises means for setting the predetermined timing as a constant time interval based on the time measuring means.
The optical cross-connect device described. 3. The optical cross-connect device according to claim 1, wherein the means for making an announcement comprises means for setting the predetermined timing as a timing at which the monitoring result accumulated in the means for accumulating is updated. 4. A time measuring means and a means for measuring the frequency with which the monitoring result accumulated in the accumulating means is updated are provided, and the notifying means is a means for measuring the predetermined timing. When the measurement frequency exceeds a threshold value, a fixed time interval based on the time measuring means is provided, and when the measurement frequency of the measuring means is less than or equal to a threshold value, the monitoring result accumulated in the accumulating means is updated timing is provided. The optical cross-connect device according to claim 1. 5. The resource for which the means for notifying is a resource in which the state of air blocking of the means for converting the wavelength or the number of wavelength multiplexing of the output link is predetermined according to the monitoring results of the two means for monitoring the predetermined timing. 2. The optical cross-connect device according to claim 1, further comprising means for setting the timing to exceed or fall below at least one reference value of the usage ratio of. 6. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching an optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength-converting the single-wavelength optical signal in the switching process of the switching means, and means for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switching means , A means for setting an optical path based on the calculation result of the optical path setting path, the wavelength converting means is provided less than the maximum number of routes of the switching means, and the wavelength for one output link In an optical network provided with a plurality of optical cross-connect devices having an upper limit for the maximum number of wavelengths that can be multiplexed, the optical cross-connect device comprises: A monitoring result of the monitoring means, which is provided in common to a plurality of the optical cross-connect devices, comprising a means for monitoring the air-blocking condition of the wavelength converting means, and a means for monitoring the wavelength multiplexing number of the output link. And a means for calculating an optical path setting route between the optical cross-connect devices based on network topology information, the number of wavelength conversion means installed, and the maximum number of wavelength division multiplexing. Means for calculating an optical path setting path between the optical cross-connect devices with reference to the monitoring result accumulated in the accumulating means. 7. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching the optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength-converting the single-wavelength optical signal in the switching process of the switching means, and means for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switching means , A means for setting an optical path based on the calculation result of the optical path setting path, the wavelength converting means is provided less than the maximum number of routes of the switching means, and the wavelength for one output link In an optical cross-connect device in which the maximum number of wavelengths that can be multiplexed is set to an upper limit, means for monitoring the air-blocking status of the wavelength converting means, Means for monitoring the wavelength multiplexing number of links, and network topology information for accumulating the monitoring results of the monitoring means, which is provided in common for a plurality of optical cross-connect devices, and the number of wavelength converting means installed and An optical cross-connect device comprising: means for transmitting a monitoring result of the monitoring means to means for calculating an optical path setting route between the optical cross-connect devices based on the maximum number of wavelength division multiplexing. 8. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching an optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength-converting the single-wavelength optical signal in the switching process of the switching means, and means for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switching means , A means for setting an optical path based on the calculation result of the optical path setting path, the wavelength converting means is provided less than the maximum number of routes of the switching means, and the wavelength for one output link An upper limit is set for the maximum number of wavelengths that can be multiplexed, and means for monitoring the air-blocking status of the wavelength converting means and the wavelength multiplexing number of the output link are monitored. And a means for accumulating the monitoring result of the means for monitoring, which is provided in an optical network including a plurality of optical cross-connect devices each including a stage, and network topology information and And a means for calculating an optical path setting route between the optical cross-connect devices based on the number of installed wavelength converting means and the maximum number of wavelength division multiplexing, wherein the calculating means is stored in the storing means. A centralized control device comprising means for calculating an optical path setting route between the optical cross-connect devices by referring to the monitoring result. 9. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching an optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength-converting the single-wavelength optical signal in the switching process of the switching means, and means for wavelength-multiplexing the single-wavelength optical signal output to the same output link switched by the switching means , Means for calculating an optical path setting route between the optical cross-connect devices based on network topology information and the number of wavelength conversion means installed and the maximum number of wavelength division multiplexing, and an optical system based on the calculation result of the calculation means. And a means for setting a path, the means for wavelength conversion is provided less than the maximum number of routes of the means for switching, In an optical network including a plurality of optical cross-connect devices having an upper limit in the maximum number of wavelengths that can be wavelength-multiplexed for one output link, the optical cross-connect device monitors the air-blocking status of the wavelength converting means. Means and means for monitoring the number of wavelength division multiplexing of the output link, and means for accumulating the monitoring results of the means for monitoring are provided commonly to a plurality of the optical cross-connect devices, and the means for calculating An optical network comprising: means for calculating an optical path setting route between the optical cross-connect devices by referring to the monitoring result accumulated in the accumulating means. 10. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching an optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength converting the single wavelength optical signal in the switching process of the switching means,
Means for wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the switching means, the topology information of the network, the number of wavelength converting means installed, and the maximum number of wavelength multiplexing A means for calculating an optical path setting route between the optical cross-connect devices, and means for setting an optical path based on the calculation result of the calculating means, wherein the wavelength converting means is the maximum of the switching means. In an optical cross-connect device, which is provided in a smaller number than the number of paths and has an upper limit to the maximum number of wavelengths that can be wavelength-multiplexed for one output link, means for monitoring the air-blocking status of the wavelength converting means, A means for monitoring the number of wavelength division multiplexes of the output link, and a unit provided in common for a plurality of optical cross-connect devices Monitored means of monitoring results optical cross-connect device, characterized in that it comprises a means for transmitting a monitoring result of said means for monitoring relative means for storing. 11. A means for demultiplexing a wavelength-multiplexed optical signal input from an input link, and a means for switching an optical signal of a single wavelength demultiplexed by the demultiplexing means to a predetermined route. Means for wavelength converting the single wavelength optical signal in the switching process of the switching means,
Means for wavelength-multiplexing an optical signal of a single wavelength output to the same output link switched by the switching means, the topology information of the network, the number of wavelength converting means installed, and the maximum number of wavelength multiplexing A means for calculating an optical path setting route between the optical cross-connect devices, and means for setting an optical path based on the calculation result of the calculating means, wherein the wavelength converting means is the maximum of the switching means. The number provided is smaller than the number of paths, and an upper limit is provided for the maximum number of wavelengths that can be wavelength-multiplexed for one output link. A plurality of optical cross-connect devices having means for monitoring the number of optical cross-connects. Commonly to connect device, centralized control apparatus characterized by means for storing results of monitoring the means for monitoring is provided. 12. The means for monitoring the air blocking status of the wavelength converting means comprises means for monitoring the unused number and the used number of the wavelength converting means, and monitoring the wavelength multiplexing number of the output link. 10. The optical cross-connect device according to claim 1 or the optical network according to claim 6 or 9, wherein the means comprises means for monitoring the number of unused wavelengths and the number of used wavelengths of the output link. 13. The means for monitoring the air-blocking status of the wavelength converting means comprises means for monitoring a usable rate obtained by dividing an unused number of the wavelength converting means by a total number, and wavelength multiplexing the output link. 10. The optical cross-connect device according to claim 1, or the optical cross-connect device according to claim 6 or 9, wherein the means for monitoring the number comprises means for monitoring the availability ratio obtained by dividing the maximum wavelength multiplexing number of the output link by the number of unused wavelengths. Optical network. 14. The means for monitoring the air-blocking status of the wavelength converting means comprises means for monitoring an unusable rate obtained by dividing the number of used wavelength converting means by the total number, and the wavelength of the output link. The optical cross-connect device according to claim 1 or claim 6 or 9, wherein the means for monitoring the number of multiplexes comprises means for monitoring an unusable rate obtained by dividing the maximum number of wavelengths of the output link by the number of used wavelengths. Optical network described. 15. The optical cross-connect device according to claim 1, wherein the wavelength converting means comprises a wavelength converting trunk connected to a part of an output port and a part of an input port of the switching means. The optical network according to 6 or 9. 16. The optical cross-connect device according to claim 1 or the optical network according to claim 6 or 9, wherein the wavelength converting means is interposed between the demultiplexing means and the switching means. 17. The optical cross-connect device according to claim 1 or the optical network according to claim 6 or 9, wherein the wavelength converting means is interposed between the switching means and the multiplexing means. 18. The wavelength conversion means is interposed between the demultiplexing means and the switching means, and between the switching means and the multiplexing means, respectively. An optical cross-connect device and the optical network according to claim 6 or 9. 19. The wavelength converting means is interposed between the switching means and the multiplexing means,
The optical cross-connect device according to claim 1, further comprising a wavelength conversion trunk connected to a part of the output and a part of the input of the switching means, and the optical network according to claim 6 or 9. 20. When installed in an information processing device, the information processing device has a function of demultiplexing a wavelength-multiplexed optical signal input from an input link, and a demultiplexing function demultiplexed by the demultiplexing function. A function of switching an optical signal of one wavelength to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of this switching function, and the same output link switched by the switching function. A function of wavelength-multiplexing an optical signal of a single wavelength to be output is provided, and the function of wavelength conversion is provided less than the maximum number of routes of the function of switching, and wavelength multiplexing can be performed for one output link. There is an upper limit on the maximum wavelength multiplexing number, and the network topology information and the number of wavelength conversion functions installed and the maximum wavelength An optical cross-connect device having a function of calculating an optical path setting route from one optical cross-connect device to another optical cross-connect device based on the number of multiplexes, and a function of setting an optical path based on the calculation result of this calculating function In a program that realizes the function applied to, the function of monitoring the air-blocking status of the wavelength conversion means, the function of monitoring the wavelength multiplex number of the output link, and the monitoring results of these monitoring functions are accumulated. As a function of calculating the optical path setting route, the optical path setting route from the own optical cross-connect device to another optical cross-connect device is referred to by referring to the monitoring result accumulated in the accumulating function. And a function of notifying the other optical cross-connect device of the monitoring result accumulated in the accumulating function at a predetermined timing. A program characterized by realization. 21. The program according to claim 20, wherein a timekeeping function is realized, and a function of setting the predetermined timing as a fixed time interval based on the timekeeping function is realized as the function of making the announcement. 22. The program according to claim 20, wherein a function of setting the predetermined timing as a timing at which the monitoring result accumulated in the accumulating function is updated is realized as the function of notifying. 23. A time counting function and a function of measuring the frequency of updating the monitoring result accumulated in the accumulating function are realized, and the function of measuring the predetermined timing is a function of the announcement. When the measurement frequency exceeds a threshold value, a fixed time interval based on the timekeeping function is set, and when the measurement frequency of the function to be measured is less than or equal to the threshold value, the function of setting the timing at which the monitoring result accumulated in the function to be accumulated is updated is realized. The program according to claim 20. 24. The resource for which the state of air-blocking of the function of converting the wavelength or the number of wavelength multiplexing of the output link is predetermined according to the monitoring results of the two functions for monitoring the predetermined timing as the function of the notification. 21. The program according to claim 20, which realizes a function of setting the timing to exceed or fall below at least one reference value of the usage ratio of. 25. When installed in an information processing device, the information processing device has a function of demultiplexing a wavelength-multiplexed optical signal input from an input link, and a demultiplexing function demultiplexed by the demultiplexing function. A function of switching an optical signal of one wavelength to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of this switching function, and the same output link switched by the switching function. It has a function of wavelength-multiplexing an output optical signal of a single wavelength and a function of setting an optical path based on the calculation result of an optical path setting route, wherein the wavelength converting function is the maximum route of the switching function. Compared to the number of optical cross-connect devices, the number is smaller than that of the other, and there is an upper limit on the maximum number of wavelength In a program that realizes a corresponding function, a function of monitoring the air-blocking status of the wavelength converting means, a function of monitoring the number of wavelength multiplexes of the output link, and a function commonly provided for a plurality of optical cross-connect devices are provided. For the function of accumulating the monitoring result of the function to be monitored and calculating the optical path setting path between the optical cross-connect devices based on the network topology information, the number of wavelength conversion functions installed, and the maximum number of wavelength division multiplexing And a function of transmitting a monitoring result of the monitoring function. 26. When installed in an information processing device, the information processing device has a function of demultiplexing a wavelength-division-multiplexed optical signal input from an input link, and a demultiplexing function demultiplexed by the demultiplexing function. A function of switching an optical signal of one wavelength to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of this switching function, and the same output link switched by the switching function. It has a function of wavelength-multiplexing an optical signal of a single wavelength to be output, and a function of setting an optical path based on the calculation result of an optical path setting route, wherein the wavelength converting function is the maximum route of the switching means. The maximum number of wavelengths that can be wavelength-multiplexed for one output link is set to an upper limit because the number is smaller than the number of wavelengths. In a program for realizing a function corresponding to a centralized control device provided in an optical network including a plurality of optical cross-connect devices having a function of monitoring the air-blocking condition and a function of monitoring the number of wavelength division multiplexing of the output link A function for accumulating a monitoring result of the function to be monitored commonly for a plurality of the optical cross-connect devices, the optical topology based on the network topology information, the number of wavelength conversion functions installed, and the maximum number of wavelength multiplexing And a function for calculating an optical path setting route between cross-connect devices, and as the calculating function, an optical path between the optical cross-connect devices is referred to by referring to the monitoring result accumulated in the accumulating function. A program that realizes the function of calculating a set route. 27. A function for demultiplexing a wavelength-multiplexed optical signal input from an input link to the information processing apparatus by installing the information processing apparatus, and a demultiplexing function demultiplexed by the demultiplexing function. A function of switching an optical signal of one wavelength to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of this switching function, and the same output link switched by the switching function. A function of wavelength-multiplexing an optical signal of a single wavelength to be output, and an optical path setting route between the optical cross-connect devices based on the number of installed network topology information and the function of wavelength conversion and the maximum number of wavelength multiplexing A function for calculating and a function for setting an optical path based on the calculation result of the calculating function are provided, and the function for wavelength conversion is In a program that realizes a function corresponding to an optical cross-connect device that is provided in a smaller number than the maximum number of routes of the switching function, and an upper limit is provided for the maximum number of wavelengths that can be wavelength-multiplexed for one output link, The function of monitoring the availability of the wavelength conversion function, the function of monitoring the wavelength multiplexing number of the output link, and the monitoring result of the function that is provided in common for a plurality of optical cross-connect devices and accumulates the monitoring results. And a function for transmitting a monitoring result of the function to be monitored to the function to be performed. 28. When installed in an information processing device, the information processing device has a function of demultiplexing a wavelength-multiplexed optical signal input from an input link, and a demultiplexing function demultiplexed by the demultiplexing function. A function of switching an optical signal of one wavelength to a predetermined route, a function of wavelength converting the optical signal of the single wavelength in the switching process of this switching function, and the same output link switched by the switching function. A function of wavelength-multiplexing an optical signal of a single wavelength to be output, and an optical path setting route between the optical cross-connect devices based on the number of installed network topology information and the function of wavelength conversion and the maximum number of wavelength multiplexing A function for calculating and a function for setting an optical path based on the calculation result of the calculating function are provided, and the function for wavelength conversion is Compared with the maximum number of routes of the switching function, an upper limit is provided for the maximum number of wavelengths that can be wavelength-multiplexed for one output link, and a function of monitoring the air-blocking status of the wavelength conversion function A program for realizing a function corresponding to a centralized control device provided in an optical network having a plurality of optical cross-connect devices having a function of monitoring the number of wavelength division multiplexing of the output links, A program that realizes a function of accumulating a monitoring result of the monitoring function in common. 29. A function of monitoring the unused number and the used number of the wavelength converting function is realized as a function of monitoring the air-blocking status of the wavelength converting function, and the wavelength multiplexing number of the output link is monitored. 29. The function for monitoring the number of unused wavelengths and the number of used wavelengths of the output link is realized as a function of
The listed program. 30. As a function of monitoring the availability of the wavelength converting function, a function of monitoring the availability ratio by dividing the unused number of the wavelength converting function by the total number is realized, and the wavelength of the output link is 29. The program according to claim 20, wherein a function of monitoring a multiplexing number is realized by a function of monitoring a usable rate obtained by dividing a maximum wavelength multiplexing number of the output link by an unused wavelength number. 31. As a function of monitoring the air-blocking status of the wavelength converting function, a function of monitoring an unusable rate obtained by dividing the number of used wavelength converting functions by the total number is realized, 29. The program according to claim 20, 25, or 28, wherein a function of monitoring the unusable rate obtained by dividing the maximum wavelength multiplexing number of the output link by the number of used wavelengths is realized as the function of monitoring the wavelength multiplexing number. 32. A recording medium readable by the information processing device, in which the program according to claim 20 is recorded.