JP2003249903A - All-optical network and optical path crossconnect - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce job and time needed to set 3R places and to effectively utilize network resources by accurately specifying the 3R places. <P>SOLUTION: When signal quality deterioration is detected, a 3R instruction showing to the effect that 3R processing has to be applied to an optical signal is transmitted to a different PXC which is closer than a PXC that has detected the quality deterioration in the direction of a transmitting-side PXC, and the PXC that has received the 3R instruction performs 3R processing of the optical signal. Each PXC publicly notifies the other PXCs of the margin of performance to perform 3R processing, and when the PXC transmits a 3R instruction, the PXC recognizes the margin of 3R throughput of the other PXCs by referring to the public notification, and transmits a 3R instruction to the other PXCs on the basis of the recognition results. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is used for an all-optical network (hereinafter referred to as AON). In particular, the 3R (Reshaping; Retiming;
The present invention relates to route control or setting control of an optical path in consideration of Regenerating) processing.

[0002]

2. Description of the Related Art AON is under study as a network for significantly reducing the network cost. AO
In N, individual communication is performed via an optical path set in the network. AON is composed of an optical path cross connect (hereinafter referred to as PXC) and a transmission link, and the setting of the optical path is performed by the input transmission link and the output transmission link of each PXC in the section from the originating PXC to the destination PXC. This is done by setting a cross-connect table that holds connection relationships. As a method for realizing the PXC, there is a method using a technique such as a TO-SW using a thermo-optic effect or a micro electromechanical movable mirror.

The electric signal processing device becomes more expensive as the electric signal speed becomes higher. At present, the speed of 10 Gb / s to 40 Gb / s is the upper limit speed at the practical level, and such an electric signal processing device is very expensive. In AON, since an optical signal is transmitted as light, an expensive electric signal processing device is unnecessary, and the network cost is greatly reduced. Further, since AON is a network that transmits optical signals as they are, there is an advantage that the same network can be continuously used even if the electric signal processing technology is speeded up.

When setting an optical path in AON, it is necessary to consider transmission characteristics when an optical signal is transmitted through an optical fiber. That is, dispersion of optical fiber, dispersion slope, PMD (Polarization Mode Dispersion) and ASE.
(Amplifier Spontaneous Emission) limits the distance that optical signals can be transmitted.

For example, FIG. 7 shows the upper limit of the transmission distance when the signal deterioration due to PMD is taken into consideration. Figure 7 shows PM
It is a figure which shows the transmission distance limit of the all optical signal by D, a horizontal axis | shaft shows a bit rate and a vertical axis | shaft shows a transmission distance. Here, D is the PMD coefficient of the optical fiber, and the unit is ps / km ^1/2 . Therefore, it is necessary to perform route control within the AON so that the transmission distance limit is not exceeded.

[0006]

Conventionally, when selecting a path of an optical path, the above-mentioned transmission characteristics are put into a constraint condition to find the shortest path. For example, the literature [J. Strand and ALCh
iu, "Issues for routingin the optical layer," IEEE C
ommun.Mag., Vol.39, No.2, pp.81-87,2 / 01], PMD
Parameters such as ASE and ASE
It has been proposed to extend the ath first) to announce flooding, and to perform autonomous distributed routing control at each node.

In such a conventional technique, it is necessary to examine the characteristics such as PMD and ASE of the optical fiber, but it is very troublesome and difficult to examine these characteristics of the already laid optical fibers one by one. Is. Further, it is complicated to take these constraints into consideration when calculating the shortest route, and it is not easy to decide where to perform the 3R relay.

Further, the reliability of the result obtained by such calculation is not always high, and as a practical safety measure,
It is necessary to take measures such as providing extra 3R implementation points,
It is not desirable for effective use of network resources.

The present invention has been made against such a background, and it is possible to reduce the labor and time required for setting the 3R implementation point and to specify the accurate 3R implementation point. It is an object of the present invention to provide an AON and PXC, a program, a recording medium, and a 3R processing method capable of effectively using network resources.

In this specification, the source PXC and the destination PXC are the source PXC and the source PXC that send a request for optical path setting prior to data transfer.
It is called C, and the PXC which is the termination destination of this request is called the receiving side PXC. At the time of data transfer after setting the optical path, either the originating PXC or the destination PXC can be the data source or the data destination. Further, the set path may be a unidirectional path or a bidirectional path.

[0011]

The present invention, on AON,
It is not necessary to calculate at which place the 3R processing should be performed, and the labor and time required for setting the optical path can be reduced. Furthermore, since the 3R implementation point is experimentally determined, the position is accurate, and the extra 3R
Efficient use of network resources can be achieved without the need to provide implementation points.

That is, a first aspect of the present invention comprises a plurality of PXCs and a transmission link connecting the plurality of PXCs to each other, and an optical path is provided between the originating PXC and the destination PXC. Is set, and this optical path is an AON relayed by a plurality of PXCs.

Here, a feature of the present invention is that the PXC has means for branching an optical signal transmitted by the optical path and one optical signal branched by the branching means into an electrical signal. Means for converting, means for detecting deterioration of signal quality of the electric signal, and, when the detection result of the detecting means detects deterioration of signal quality of the electric signal, a signal on the originating side of the PXC rather than the own PXC on the optical path. A means for transmitting a 3R instruction indicating that it is necessary to perform 3R processing on the optical signal transmitted by the optical path to another PXC in the PXC direction, and the optical signal when the own PXC receives the 3R instruction. And a means for 3R processing the optical signal transmitted by the path.

Further, the means for notifying the usage status of the means for 3R processing to another PXC is provided, and the means for sending the 3R instruction means for processing the 3R in another PXC by referring to the announcement. Means for recognizing the usage status of the PXC and another PX in the PXC direction on the originating side with respect to the own PXC on the optical path based on the recognition result of the recognizing means.
It is desirable to provide a means for transmitting the 3R instruction to the closest other PXC that can accept the 3R instruction issued by the own PXC among Cs.

Alternatively, a means for notifying the usage status of the means for processing the 3R to another PXC is provided, and the 3R
The means for transmitting the instruction refers to the above-mentioned announcement and refers to another PXC.
Means for recognizing the state of use of the means for 3R processing, and another P on the optical path in the direction of the PXC of the originating side from the own PXC based on the recognition result of the recognizing means.
3 among other PXCs with the highest margin of 3R processing capacity that can accept the 3R instruction issued by the own PXC among the XCs
It is desirable to have means for sending an R instruction.

Here, the margin of 3R processing capability means, for example, that the means for performing 3R processing can perform 3R processing in parallel for a plurality of optical paths, and the maximum number of parallel processing optical paths is set. The ratio of the number of optical paths actually processed can be set as the margin of the 3R processing capacity.

As a result, the PXC for 3R processing can be selected according to the margin of the ability for 3R processing, so that network resources can be effectively used. For example, when the means for 3R processing in the PXC immediately before the PXC that has detected the signal quality deterioration is blocked, the 3R instruction is further sent to the PXC in the preceding stage. If the means for 3R processing is blocked in the PXC as well, the 3R instruction is further sent to the PXC in the preceding stage.
By giving a 3R instruction retroactively, network resources can be effectively used by utilizing the available means for 3R processing. Or the 3R in the immediately preceding PXC
Even if there is a room for processing, the PXC in the previous stage
When there is a larger margin in the means for 3R processing in (3), the network resource can be effectively used by transmitting the 3R instruction to the PXC having the larger margin.

A second aspect of the present invention is a PXC, and a feature of the present invention is that it comprises a plurality of PXCs and a transmission link for connecting the plurality of PXCs to each other, An optical path is set between the PXC and the receiving side PXC, the optical path is applied to an AON relayed by a plurality of PXCs, a means for branching an optical signal transmitted by the optical path, and a means for branching the optical signal. Means for converting one of the optical signals branched by the electric signal into an electric signal, means for detecting the deterioration of the signal quality of the electric signal, and the detection result of the detecting means detects the deterioration of the signal quality of the electric signal. A means for transmitting a 3R instruction indicating that it is necessary to perform 3R processing on the optical signal transmitted by the optical path to another PXC in the PXC direction on the originating side of the own PXC on the optical path; Own PXC There an optical signal transmitted by the optical path upon receipt of the 3R instructions at and means for 3R process.

Further, the means for notifying the usage status of the means for 3R processing to another PXC is provided, and the means for sending out the 3R instruction is means for performing the 3R processing in another PXC with reference to the notification. Means for recognizing the usage status of the PXC and another PX in the PXC direction on the originating side with respect to the own PXC on the optical path based on the recognition result of the recognizing means.
It is desirable to provide a means for transmitting the 3R instruction to the closest other PXC that can accept the 3R instruction issued by the own PXC among Cs.

Alternatively, it is provided with means for notifying the other PXC of the usage status of the means for processing the 3R,
The means for transmitting the instruction refers to the above-mentioned announcement and refers to another PXC.
Means for recognizing the state of use of the means for 3R processing, and another P on the optical path in the direction of the PXC of the originating side from the own PXC based on the recognition result of the recognizing means.
3 among other PXCs with the highest margin of 3R processing capacity that can accept the 3R instruction issued by the own PXC among the XCs
It is desirable to have means for sending an R instruction.

According to a third aspect of the present invention, when installed in an information processing apparatus, the information processing apparatus is provided with a plurality of PXCs and a transmission link for connecting the plurality of PXCs to each other. , An optical path is set up between the PXC and the destination PXC, and this optical path is applied to an all-optical network relayed by a plurality of PXCs.
The optical signal transmitted by the optical path is branched, one of the branched optical signals is converted into an electric signal, the deterioration of the signal quality of the electric signal is detected, and the optical signal transmitted by the optical path is 3R. It is a program that realizes a function as a device that controls a PXC to be processed.

Here, the feature of the present invention lies in the PXC direction on the originating side of the PXC controlled by itself on the optical path when the detection result detects the signal quality deterioration of the electric signal. This is to realize the function of transmitting to another PXC a 3R instruction indicating that it is necessary to perform 3R processing on the optical signal transmitted by the optical path.

Further, as a function of realizing the function of notifying the other PXC of the margin of the capability of 3R processing and transmitting the 3R instruction, another PXC is referred to by referring to the notification.
In the PXC on the originating side of the PXC controlled by itself on the optical path based on the recognition result of the recognizing function of the 3R processing capability in 3 which self-controlled PXC emits
It is desirable to realize the function of transmitting the 3R instruction to the closest other PXC that can accept the R instruction.

Alternatively, as a function of realizing the function of notifying the other PXC of the margin of 3R processing capability and transmitting the 3R instruction, the other PX is referred to by referring to the notification.
Among the functions of recognizing the margin of the ability to perform the 3R processing in C and other PXCs in the PXC direction on the originating side from the PXC controlled by itself on the optical path based on the recognition result of the recognizing function. It is desirable to realize the function of sending a 3R instruction to another PXC having the highest margin of 3R processing capability capable of accepting the 3R instruction issued by the PXC controlled by the PXC.

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, it is possible to reduce the labor and time required for setting the 3R implementation point by using an information processing device such as a computer device, and to identify the accurate 3R implementation point, and to save the network resource. It is possible to realize PXC and AON that can be effectively used.

A fifth aspect of the present invention is to provide a plurality of PXCs,
A transmission link that connects the plurality of PXCs to each other is provided, and an optical path is set between the originating PXC and the destination PXC, and this optical path is relayed by the plurality of PXCs.
This is a 3R processing method applied to N.

Here, a feature of the present invention is that the PXC branches an optical signal transmitted by the optical path, converts one of the branched optical signals into an electric signal, and then the electric signal. Signal quality deterioration of the electric signal is detected, and when the detection result detects the signal quality deterioration of the electric signal, the PXC that has detected the electric signal quality deterioration on the optical path.
The PXC that has received the 3R instruction transmits the 3R instruction indicating that it is necessary to perform the 3R processing on the optical signal transmitted by the optical path to another PXC in the PXC direction on the calling side. The 3R processing is performed on the optical signal transmitted through the optical path.

Further, each PXC announces the allowance of the capability of 3R processing to other PXCs, and when the PXC sends a 3R instruction, the PXC refers to the notification received from the other PXC and refers to the other PXC. It is possible to accept the 3R instruction among other PXCs in the PXC direction of the calling side than the PXC which recognizes the margin of the ability to perform the 3R processing and sends the 3R instruction on the optical path based on the recognition result. It is desirable to send a 3R instruction to the other PXC closest to it.

Alternatively, each PXC announces the allowance of the capability of 3R processing to other PXCs, and when the PXC sends a 3R instruction, the PXC refers to the notification received from the other PXC and refers to the other PXC. It is possible to accept the 3R instruction among other PXCs in the PXC direction of the calling side than the PXC which recognizes the margin of the ability to perform the 3R processing and sends the 3R instruction on the optical path based on the recognition result. 3R against other PXC with the highest margin of 3R processing capacity
It is desirable to send instructions.

[0031]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of the PXC of this embodiment. FIG. 2 is a block diagram of a 3R trunk according to this embodiment. FIG. 3 is a conceptual diagram of AON of this embodiment. 4 to 6 are views for explaining the 3R processing method of this embodiment.

In this embodiment, as shown in FIG.
An XC and a transmission link connecting the plurality of PXCs to each other are provided, and the originating PXC (A) and the destination PXC (J)
An optical path (solid line) is set between the two, and this optical path is an AON relayed by a plurality of PXCs (B, C, D, E, F, G, H, I).

Here, as a feature of the present invention, as shown in FIG. 1, the PXC includes an optical branching device 10 for branching an optical signal transmitted by the optical path and a 3R trunk 2.
As shown in FIG. 2, an optical-electrical conversion unit 1 for converting one optical signal branched by the optical branching device 10 into an electric signal, and a signal quality deterioration detection for detecting the signal quality deterioration of the electric signal as 0. When the detection result of the unit 2 and the signal quality deterioration detecting unit 2 detects the deterioration of the signal quality of the electric signal, the signal is transmitted to the other PXC on the optical path in the PXC (A) direction on the originating side of the own PXC. A 3R instruction unit 3 which sends out a 3R instruction indicating that it is necessary to perform 3R processing on an optical signal transmitted by the optical path, and an optical signal transmitted by the optical path when the own PXC receives the 3R instruction. It is provided with a 3R processing unit 4 that performs 3R processing of a signal.

Further, as the 3R trunk 20, the 3R
The 3R instruction unit 3 is provided with a usage status notification unit 6 that notifies the usage status of the processing unit 4 to other optical path cross-connects.
The state of use of the 3R processing unit 4 in the other PXC is recognized by referring to the announcement, and based on the recognition result, the other PXC in the PXC (A) direction on the originating side of the own light PXC on the optical path is recognized. The 3R instruction is sent to the closest other PXC that can accept the 3R instruction issued by the own PXC.

Alternatively, as the 3R trunk 20, 3
The R status processing unit 4 is provided with a usage status notification unit 6 that notifies the other optical path cross-connects of the usage status.
Recognizes the usage status of the 3R processing unit 4 in another PXC by referring to the announcement, and based on this recognition result, another PXC (A) direction on the optical transmission side of the own light PXC is present on the optical path. The 3R instruction is sent to another PXC having the highest margin of 3R processing capability capable of accepting the 3R instruction issued by the own PXC among the PXCs.

Although the 3R trunk 20 can perform the 3R processing in parallel on a plurality of optical paths, in the present embodiment, the optical processing for the maximum number of parallel processing optical paths is actually performed. Let the ratio of the number of passes be the margin of 3R processing capacity.

A device (not shown) for controlling the PXC of this embodiment can be realized by a computer device which is an information processing device. That is, by installing in a computer device,
It is a program for realizing the function as a device for controlling the PXC shown in FIG. 1, and when the detection result of the signal quality deterioration detection unit 2 detects the signal quality deterioration, it is a source side rather than the PXC controlled by itself on the optical path. To realize a function corresponding to the 3R instructing unit 3 which sends out a 3R instruction indicating that it is necessary to perform 3R processing on the optical signal transmitted by the optical path to another PXC in the PXC (A) direction. By installing the program, an apparatus for controlling the PXC of this embodiment can be realized by using the computer apparatus.

Further, the program of this embodiment is installed in a computer device to notify the computer device of the margin of the 3R processing capability of the 3R processing unit 4 to other PXCs. As a function corresponding to the 3R instruction unit 3, the function corresponding to 6 is realized, and the 3R in another PXC is referred to by referring to the announcement.
A function of recognizing the margin of processing ability, and another PXC in the PXC (A) direction on the originating side of the PXC controlled by itself on the optical path based on the recognition result of the recognizing function.
Among them, the function of transmitting the 3R instruction to the closest other PXC that can accept the 3R instruction issued by the PXC controlled by itself is realized.

Alternatively, the program of the present embodiment is installed in a computer device to notify the computer device of the margin of the 3R processing capability of the 3R processing unit 4 to another PXC. As a function corresponding to the 3R instruction unit 3, the function corresponding to 6 is realized, and as a function corresponding to the 3R instructing section 3, the 3 in the other PXC is referred to.
A function for recognizing the margin of the R processing capability and another PX in the PXC (A) direction on the originating side of the PXC controlled by itself on the optical path based on the recognition result of the recognizing function.
Another PXC with the highest margin of 3R processing capability that can accept the 3R instruction issued by the PXC controlled by itself within C
And the function of sending a 3R instruction to

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.

Thus, using the computer device,
The time and effort required for setting the 3R implementation point can be reduced, the accurate 3R implementation point can be specified, and effective use of network resources can be achieved.
XC and AON can be realized.

The present embodiment will be described in more detail below.

The structure of the PXC of this embodiment is shown in FIG. P
XC is an optical branching device 10 and an AON switch (OSW) unit 3
It is composed of 0, 3R trunks 20 and an optical multiplexer 40. If the optical signal is not deteriorated, it is directly output from the input port to the output port without passing through the 3R trunk 20. For those that deteriorate optical signals, 3R
After the lead-in trunk 20 is subjected to the 3R processing and is output to a desired output port. In the 3R processing, the optical signal is once converted into an electrical signal and then the 3R processing is performed.

In this embodiment, when setting an optical path, an optical signal is input from the originating PXC (A), the optical signal is sequentially drawn into the 3R trunk 20 by the PXC on the way, and the reception state is monitored. If there is no signal quality deterioration, set the cross connect table directly from the input port to the output port,
If the signal quality is deteriorated, the cross-connect table is set so as to go back to the PXC in the previous stage, temporarily pull in the 3R trunk 20 at the PXC, reproduce the optical signal, and output the signal to the output port. Thus adaptively 3
An optical signal is drawn into the R trunk 20.

Referring to FIGS. 4 and 5, the AO of this embodiment is used.
The 3R processing method in N will be described. First, FIG.
As indicated by the solid line, the originating PXC (A) and the receiving P
An optical path is set between XC (J) and along the shortest path with the minimum cost. Here, the deterioration of the optical signal is not a constraint for the route control. Instead, as described above, the PXC (A) on the calling side is used when signaling the optical path setting.
Monitors the deterioration status of the optical path signal transmitted from. Figure 4
In the above example, the optical signal is drawn into the 3R trunk 20 by the PXC in the preceding stage of the PXC that has detected the deterioration.

Further, as shown in FIG. 5, when the 3R trunk 20 is blocked by the PXC in the previous stage and cannot be captured, the process further returns to the previous stage to try to capture the 3R trunk 20. When the optical path cannot be finally set along the shortest path, the optical path setting by the shortest path is given up and the setting of the optical path is attempted along the different second shortest path. The route indicated by the alternate long and short dash line in FIG. 3 is a candidate for another shortest route.

That is, since the electric signal can be monitored by terminating the 3R, segmentation of the optical path is performed there, and highly accurate fault detection such as monitoring of bit error can be performed. By setting a spare optical path for each of these sections, it is possible to operate the optical path with high reliability.

Further, as shown in FIG. 6, each PXC has its own P in order to provide a margin in the usage state of the 3R trunk 20.
It is possible to notify the PXC of the usage state of the 3R trunk 20 of the XC to another PXC, and specify that the 3R trunk 20 performs the 3R processing in the PXC with a lot of vacancy.
In the example of FIG. 6, there is a vacancy in the 3R trunk 20 in both the PXC one before and the PXC two in front of which the signal quality deterioration is detected, and 3R processing is possible in any PXC.
The 3R process is performed by the PXC two before in consideration of the margin of the processing capacity of the 3R trunk 20.

(Summary of Examples) In the 3R processing, an optical signal is once converted into an electrical signal and then the 3R processing is performed. Therefore, it is necessary to perform processing in consideration of the bit rate of the signal. A high-speed electric signal processing device is expensive, and it is desirable to keep the 3R processing amount to a necessary minimum number in order to economically configure a network. From this point of view as well, in the AON of this embodiment, the 3R processing can be performed at the place where the 3R processing is really required, and thus it is possible to avoid performing the 3R processing more than necessary.

Further, in order to cope with the speeding up of optical signals due to the progress of transmission technology, it is desirable that the 3R processing has a removable structure. From this point of view, the AON shown in this embodiment is effective.

[0051]

As described above, according to the present invention,
It is possible to reduce the labor and time required to set the 3R implementation point, to specify the accurate 3R implementation point, and to effectively use the network resources.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a PXC of this embodiment.

FIG. 2 is a block configuration diagram of a 3R trunk according to the present embodiment.

FIG. 3 is a conceptual diagram of AON of this embodiment.

FIG. 4 is a diagram for explaining the 3R processing method of the present embodiment (3R processing by PXC immediately before).

FIG. 5 is a diagram for explaining the 3R processing method of the present embodiment (3R processing by PXC other than immediately before).

FIG. 6 is a diagram for explaining the 3R processing method according to the present embodiment (3R processing according to the capacity margin).

FIG. 7 is a diagram showing a transmission distance limit of an all-optical signal by PMD.

[Explanation of symbols]

1 Opto-electric converter 2 Signal quality deterioration detector 3 3R indicator 4 3R processing unit 5 Electro-optical converter 6 Usage Notice Department 10 Optical splitter 20 3R trunk 30 switch 40 Optical multiplexer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Eiji Oki             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation F-term (reference) 5K002 BA04 BA05 BA06 CA01 DA12                       DA14 FA01

Claims (13)

[Claims] 1. A plurality of optical path cross-connects and a transmission link interconnecting the plurality of optical path cross-connects are provided, and between the originating side optical path cross-connect and the destination side optical path cross-connect. An optical path is set in the optical path, and the optical path is relayed by a plurality of optical path cross-connects. In the all-optical network, the optical path cross-connect has means for branching an optical signal transmitted by the optical path, Means for converting one of the optical signals branched by the means for converting into an electric signal, means for detecting the deterioration of the signal quality of the electric signal, and the detection result of the detecting means detects the deterioration of the signal quality of the electric signal. Occasionally, in front of another optical path cross connect in the optical path cross connect direction on the outgoing side from the own optical path cross connect on the optical path. 3R (Reshaping to light signals transmitted by the optical path; Retiming; Regene
rating) means for transmitting a 3R instruction indicating that it is necessary to perform processing, and means for subjecting the optical signal transmitted by the optical path to 3R processing when the own optical path cross-connect receives the 3R instruction. An all-optical network characterized by that. 2. A means for notifying the other optical path cross connect of the usage status of the means for 3R processing, wherein the means for sending the 3R instruction refers to the notification and makes another optical path cross connect. Means for recognizing the usage status of the means for performing the 3R processing, and other light on the optical path in the direction of the optical path cross connect on the outgoing side of the own optical path cross connect based on the recognition result of the recognizing means. The all-optical network according to claim 1, further comprising means for transmitting a 3R instruction to another closest optical path cross connect that can accept the 3R instruction issued by the optical path cross connect among the path cross connects. 3. A means for notifying the usage status of the 3R processing means to another optical path cross connect, and the means for sending out the 3R instruction refers to the notification to another optical path cross connect. Means for recognizing the usage status of the means for performing the 3R processing, and other light on the optical path in the direction of the optical path cross connect on the outgoing side of the own optical path cross connect based on the recognition result of the recognizing means. 2. A means for transmitting a 3R instruction to another optical path cross connect having the highest margin of 3R processing capacity capable of accepting the 3R instruction issued by the own optical path cross connect among the path cross connects. All-optical network described. 4. A plurality of optical path cross-connects and a transmission link interconnecting the plurality of optical path cross-connects are provided, and between the originating side optical path cross-connect and the destination side optical path cross-connect. An optical path is set up in the optical path, the optical path is applied to an all-optical network relayed by a plurality of optical path cross-connects, and a means for branching an optical signal transmitted by the optical path and a branching means for branching the optical signal are provided. Means for converting one optical signal into an electric signal, means for detecting deterioration of the signal quality of the electric signal, and means for detecting the deterioration of the signal quality of the electric signal on the optical path when the detection result of the detecting means detects the deterioration of the signal quality of the electric signal. And the optical signal transmitted by the optical path to another optical path cross connect in the direction of the optical path cross connect on the outgoing side from the own optical path cross connect. Means for transmitting a 3R instruction indicating that it is necessary to perform 3R processing on the signal, and means for subjecting the optical signal transmitted by the optical path to 3R processing when the own optical path cross-connect receives the 3R instruction. An optical path cross connect characterized by having. 5. A means for notifying the other optical path cross connect of the usage status of the means for 3R processing is provided, and the means for sending the 3R instruction refers to the notification to make another optical path cross connect. Means for recognizing the usage status of the means for performing the 3R processing, and other light on the optical path in the direction of the optical path cross connect on the outgoing side of the own optical path cross connect based on the recognition result of the recognizing means. 5. The optical path cross connect according to claim 4, further comprising means for transmitting a 3R instruction to another closest optical path cross connect capable of accepting the 3R instruction issued by the optical path cross connect among the path cross connects. . 6. A means for notifying the other optical path cross connect of the usage status of the means for 3R processing, wherein the means for sending the 3R instruction refers to the notification to make another optical path cross connect. Means for recognizing the usage status of the means for performing the 3R processing, and other light on the optical path in the direction of the optical path cross connect on the outgoing side of the own optical path cross connect based on the recognition result of the recognizing means. 5. A means for transmitting a 3R instruction to another optical path cross connect having the highest margin of 3R processing capability capable of accepting the 3R instruction issued by the optical path cross connect among the path cross connects. Optical path cross connect described. 7. The information processing device, when installed in the information processing device, is provided with a plurality of optical path cross-connects and a transmission link interconnecting the plurality of optical path cross-connects. An optical path is set between the optical path cross connect and the destination optical path cross connect, and this optical path is applied to an all-optical network relayed by a plurality of optical path cross connects and is transmitted by the optical path. An optical path cross connect for branching an optical signal, converting one of the branched optical signals into an electric signal, detecting deterioration of the signal quality of the electric signal, and performing 3R processing of the optical signal transmitted by the optical path. In the program for realizing the function as the control device, when the detection result detects the signal quality deterioration of the electric signal, the optical power It is necessary to perform 3R processing on the optical signal transmitted by the optical path to another optical path cross-connect in the optical path cross-connect on the outgoing side of the optical path cross-connect controlled by itself. A program that realizes a function of transmitting a 3R instruction indicating the. 8. An optical path cross-connect that realizes a function of publicizing the margin of 3R processing capability to other optical path cross-connects, and refers to the notification as another optical path cross-connect as a function of sending the 3R instruction. And a function of recognizing the margin of the 3R processing capability in the optical path cross connect on the outgoing side of the optical path cross connect controlled by itself on the optical path based on the recognition result of the recognizing function. 8. A function of transmitting a 3R instruction to another closest optical path cross connect capable of accepting a 3R instruction issued by an optical path cross connect controlled by itself among other optical path cross connects. The listed program. 9. An optical path cross connect that realizes a function of notifying another optical path cross connect of a margin of 3R processing capability, and refers to the notification as another optical path cross connect. And a function of recognizing the margin of the 3R processing capability in the optical path cross connect on the outgoing side of the optical path cross connect controlled by itself on the optical path based on the recognition result of the recognizing function. A function of transmitting a 3R instruction to another optical path cross connect having the highest margin of 3R processing capacity capable of accepting the 3R instruction issued by the optical path cross connect controlled by itself among the other optical path cross connects. The program according to claim 7, which realizes. 10. A recording medium readable by the information processing apparatus, in which the program according to claim 7 is recorded. 11. A plurality of optical path cross-connects and a transmission link interconnecting the plurality of optical path cross-connects are provided, and between the originating side optical path cross-connect and the destination side optical path cross-connect. In the 3R processing method applied to an all-optical network relayed by a plurality of optical path cross-connects, the optical path is set to The optical signal is branched and one of the branched optical signals is converted into an electric signal to detect the signal quality deterioration of the electric signal. When the detection result detects the signal quality deterioration of the electric signal, Before another optical path cross connect in the direction of the optical path cross connect on the originating side from the optical path cross connect that detected the deterioration of the electrical signal quality The 3R instruction indicating that it is necessary to perform the 3R processing on the optical signal transmitted by the optical path is transmitted,
The 3R processing method, wherein the optical path cross-connect that receives the instruction performs 3R processing on the optical signal transmitted by the optical path. 12. Each optical path cross connect announces the margin of 3R processing capability to another optical path cross connect, and when the optical path cross connect sends a 3R instruction, the other optical path cross connect sends Refer to the announcement received and refer to the above 3 in other optical path cross connect.
The margin of the R processing capability is recognized, and based on this recognition result, another optical path cross connect in the optical path cross connect direction on the originating side of the optical path cross connect that sends the 3R instruction on the optical path is detected. 3 to other closest optical path cross connect that can accept 3R instructions within
The 3R processing method according to claim 11, wherein the R instruction is transmitted. 13. Each optical path cross connect announces the margin of 3R processing capability to another optical path cross connect, and when the optical path cross connect sends out a 3R instruction, the other optical path cross connect is notified from the other optical path cross connect. Refer to the announcement received and refer to the above 3 in other optical path cross connect.
The margin of the R processing capability is recognized, and based on this recognition result, another optical path cross connect in the optical path cross connect direction on the originating side of the optical path cross connect that sends the 3R instruction on the optical path is detected. 12. The 3R processing method according to claim 11, wherein the 3R instruction is sent to another optical path cross connect having the highest margin of 3R processing capability capable of accepting the 3R instruction.