JP2003258869A - Optical path network, aon constitution method, node, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the labor and time required for setting a cut through path and the possibility of ineffective holding. <P>SOLUTION: A plurality of AON (all optical networks) closed on the basis of a policy of not requiring 3R (Reshaping, Retiming and Regenerating) processing are respectively constituted of a plurality of nodes. They are properly interconnected, thereby setting a desired cut-through path simply in a short period of time. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

The present invention is used for setting a cut-through path in optical burst data transfer.

[0002]

2. Description of the Related Art In data transfer in an IP (Internet Protocol) network, a node reads header information of an IP packet and transfers the IP packet to its destination route. This is repeated among a plurality of nodes, and as a result, the IP packet reaches the desired destination. In such an IP packet transfer method, transfer is performed in units of individual IP packets, so that it is necessary to read the header information of each individual IP packet.

On the other hand, in recent years, the demand for a series of large-volume data transfer such as moving image data is rapidly increasing. Such a series of large amount of data is called burst data, and is divided into a large number of IP packets and accommodated. For such burst data transfer, it is inefficient to perform the transfer in units of individual IP packets, so a cut-through path is set between specific nodes. The transfer is performed at once without reading the header information. Especially, it is effective for data transfer using the optical path.

That is, in data transfer using an optical path as a transmission path between nodes, each node temporarily converts an optical signal that has arrived through the optical path into an electrical signal, reads header information of an IP packet, After the destination route is determined, it is necessary to convert the optical signal again and send it to the optical path again. On the other hand, in the data transfer using the cut-through path by the wavelength path, it is not necessary to convert the optical signal into an electrical signal once to read the header information, and the optical signal can be transferred as it is from the start point to the end point of the cut-through path. , Very efficient burst data transfer can be performed.

[0005]

As described above, the cut-through path is optimum for burst data transfer using the wavelength path, but it is necessary to set the cut-through path in advance prior to burst data transfer. Become.

That is, a request for setting a cut-through path is sent from the source node to the destination node. The request packet in which this request is stored is an IP packet, and arrives at the destination node while the header information is read by each node. In the middle of this
When it is difficult to set the cut-through path due to lack of network resources or the like, a signal for notifying the fact is sent to the originating node. In response to this, the node on the sending side retries the setting of the cut-through path or gives up.

Further, it is desirable that the cut-through path be connected from the source node to the destination node by a single line, but depending on the distance between the source node and the destination node, the optical signal Signal quality deterioration due to loss and crosstalk becomes significant, and 3R (Reshaping, Retim
ing, Regenerating) processing may be required and 3R
It is necessary to calculate which node will perform the process.

As described above, the cut-through path itself is most suitable for burst data transfer, but the user who is the source of data transmission secures network resources in consideration of the data amount of the data to be transmitted. It is necessary to set the cut-through path by setting the cut-through path, and there is a problem that the setting takes time and effort.

Also, the cut-through path is set successfully,
The cut-through path is released after the burst data transfer is performed, but unless the user who is the source sends the release request, the cut-through path is not released, and the cut-through path may be suspended pending. Cannot be denied.

The present invention has been made against such a background, and provides a node, an optical path network, a program, and a recording medium which can reduce the labor and time required for setting a cut-through path and the suspension of invalidation. The purpose is to do.

In this specification, a source node and a destination node are called a node that sends a request for path setting prior to data transfer, and a destination of this request. This node is called the destination node. At the time of data transfer after the path is set, either the source node or the destination node can be the data source or the data destination. Further, the set path may be a unidirectional path or a bidirectional path.

[0012]

The present invention is characterized in that cut-through path setting need not be performed prior to burst data transfer. Further, the present invention is characterized in that the cut-through path is released immediately after the burst data transfer is completed.

Further, the present invention allows a plurality of nodes to
A characteristic is that a plurality of AONs (All Optical Networks) that are closed under the policy that 3R processing is not required are configured, respectively, and by connecting these appropriately, a desired cut-through path can be set easily and in a short time. And That is, within one AON, 3R processing is not required, and at the edge node that connects each AON,
R treatment can be applied. This eliminates the need for a procedure for calculating the portion to which 3R is applied in advance, and can reduce the labor and time required for setting the cut-through path and the suspension of invalidation.

That is, the first aspect of the present invention is an optical path network, and a feature of the present invention is that a plurality of nodes are closed under the policy that 3R processing is not required. Each AON is configured, and this node is provided with means for setting an optical path according to the IP address of an incoming IP packet. The means for setting this optical path is means for detecting the arrival of the first packet of burst data, When the arrival of the first packet of the burst data is detected by this detecting means, the cut-through path setting means for setting the cut-through path to the next-stage node, the means for detecting the arrival of the last packet of the burst data, and this detection are performed. If the means detects the arrival of the last packet of burst data, And a cut-through path releasing means for releasing a path after passing the final packet, the cut-through path setting means determines whether or not the cut-through path up to the node at the next stage can be set, and the determination result of the determining means is If the setting is not possible, it comprises means for temporarily accumulating incoming burst data, and IP transfer means for individually transferring each packet constituting the burst data accumulated in the temporarily accumulating means according to its IP address. The cut-through path setting means in the node corresponding to the edge node of the AON concerned is means for judging whether or not the cut-through path up to the first node corresponding to the edge node of another adjacent AON can be set, and this judgment is made. If the determination result of the means cannot be set, the edge node of the adjacent other AON It is in place and a second and subsequent sequential attempt means the setting of the cut-through path to the node corresponding to.

As described above, according to the present invention, instead of setting the cut-through path in advance, the cut-through path is set up to a place where it can be set together with the transfer of the burst data, and when it becomes difficult to set the cut-through path. ,
It is characterized by switching to IP transfer. This allows
The present invention is characterized in that the cut-through path setting need not be performed prior to the burst data transfer, and the labor and time required for setting the cut-through path can be reduced.

Further, according to the present invention, a cut-through path is set from one AON to another AON, and finally a cut-through path is set between the source node and the destination node. At this time, since 3R processing is performed by any of the AON edge nodes, it is not necessary to calculate in advance the location where 3R processing is performed.

Subsequent burst data amount information is written as the header information of the leading packet, and the means for detecting the arrival of the leading packet refers to the succeeding burst data amount information and determines the leading packet of the burst data. Means for detecting may be provided. The burst data amount information is, for example, packet number information or packet length information that follows the head packet.

Information indicating that the packet is the last packet of burst data is written as the header information of the last packet, and the means for detecting the arrival of the last packet is the last packet. Means for detecting the last packet of burst data by referring to the information indicating

As a result, the present invention is characterized in that the cut-through path is released immediately after the burst data transfer is completed, and the invalid hold of the cut-through path can be reduced.

The means for determining whether or not the setting is possible is as follows.
A means for determining whether or not there is a vacant wavelength for setting a cut-through path to the next-stage node, and means for determining whether or not the node corresponding to the AON edge node can be set to the other AON edge node A means for determining the presence / absence of a vacant wavelength for setting a cut-through path to the corresponding node at the next stage and the difference between the allowable transfer rate to the own node and the allowable transfer rate to the node at the next stage are provided. It is desirable to prepare.

The node, for example, means for transmitting a signal quality test packet to another node, and means for returning its own ID to the source of the packet when the packet is received without signal quality deterioration. The AON used in the present invention can be configured by including means for calculating an area that does not require 3R processing according to the returned ID.

A second aspect of the present invention is an AON configuration method. The feature of the present invention lies in that a signal quality test packet is sent from one node to another node and the packet is not deteriorated in signal quality. The received other node has its own ID
Is returned to the node, and by receiving this reply, the node examines an area that does not require the 3R processing, and thus the node is configured to form a closed AON under the policy that the 3R processing is not required. . For example,
The AON is virtually configured and is different for each originating node.
Virtually configure ON.

A third aspect of the present invention is a node, which is characterized by being provided in a plurality of AONs which are closed under the policy that 3R processing is not required.
A means for setting an optical path according to the IP address of the incoming IP packet is provided, and the means for setting the optical path is a means for detecting the arrival of the first packet of the burst data and a head packet of the burst data by this detecting means. When the arrival of the last packet of the burst data is detected, the cut-through path setting means for setting the cut-through path to the next-stage node, the means for detecting the arrival of the last packet of the burst data, and the means for detecting the arrival of the last packet of the burst data When detected, the cut-through path releasing means releases the already set cut-through path after the passage of the final packet, and the cut-through path setting means determines whether or not the cut-through path to the next-stage node can be set. Means and judgment results of this judgment means cannot be set Means for temporarily storing the burst data arriving in case the I individual packets that make up the burst data stored in the means for the temporary storage
IP cut-off means for individually transferring according to the P address, and the cut-through path setting means in the node corresponding to the edge node of the AON cuts to the first node corresponding to the edge node of another adjacent AON. A means for judging whether or not a through path can be set, and if the judgment result of this judgment means is not set, the setting of the cut-through path up to the second and subsequent nodes corresponding to the edge node of the adjacent other AON is sequentially tried. It is equipped with means.

Means for transmitting the signal quality test packet to another node, means for returning the own ID to the source of the packet when the packet is received without signal quality deterioration, and the means for transmitting the packet according to the returned ID It is desirable to provide means for calculating areas that do not require 3R processing.

A fourth aspect of the present invention is a program. The feature of the present invention resides in that, when installed in an information processing device, the information processing device does not require 3R processing. As a function corresponding to a device for controlling a node provided in a plurality of AONs closed in, a function of setting an optical path according to an IP address of an incoming IP packet is realized, and as a function of setting this optical path, The function of detecting the arrival of the first packet of burst data, and when the arrival of the first packet of burst data is detected by this detection function,
A cut-through path setting function that sets the cut-through path to the next node, a function that detects the arrival of the last packet of burst data, and when the arrival of the last packet of burst data is detected by this detection function,
A cut-through path release function that releases a cut-through path that has already been set after passing the final packet, and a function that determines whether or not a cut-through path up to the next node can be set as the cut-through path setting function, If the judgment result of the judgment function is not settable, the function of temporarily accumulating the incoming burst data and the individual packets constituting the burst data accumulated in the function of temporarily accumulating are individually transferred according to their IP addresses. And a cut-through path setting function to the first node corresponding to an edge node of another adjacent AON as the cut-through path setting function in the node corresponding to the edge node of the AON. The judgment function and the judgment result of this judgment function cannot be set. The case there is to be realized and a function to attempt to set a cut-through path to the second and subsequent nodes corresponding to the edge node of the other AON adjacent sequentially.

A function of transmitting a signal quality test packet to another node, a function of returning its own ID to the source of the packet when the packet is received without deterioration of signal quality, and a function of returning the ID It is desirable to realize a function of calculating an area that does not require 3R processing.

A fifth 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, a node and an optical path network can be realized by using an information processing device such as a computer device, which can reduce the labor and time required for setting the cut-through path and the invalid hold.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION A node and an optical path network according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram of an optical path network of this embodiment.
FIG. 2 is a block diagram of the optical path setting unit of this embodiment. FIG. 3 is a block diagram of the cut-through path setting unit of this embodiment. FIG. 4 is a block diagram of the burst head packet of this embodiment. FIG. 5 is a block diagram of the burst final packet of this embodiment. FIG. 6 is a block diagram of the node of this embodiment. FIG. 7 is a diagram for explaining the AON configuration procedure.

This embodiment is an optical path network,
The feature of this embodiment is that, as shown in FIG. 1, a plurality of nodes respectively constitute a plurality of AONs that are closed under the policy that 3R processing is not required, and this node is configured as shown in FIG. , The incoming IP packet I
An optical path setting unit 1 for setting an optical path in accordance with the P address is provided. The optical path setting unit 1 detects a arrival of a head packet of burst data, and a burst data head detecting unit 11 and the burst data head detecting unit 11. When the arrival of the first packet of the burst data is detected by the, the cut-through path setting unit 12 that sets the cut-through path to the next node, and the burst data end detection unit 13 that detects the arrival of the last packet of the burst data.
And a cut-through path release unit 14 that releases the already set cut-through path after the last packet has passed when the burst data end detection unit 13 detects the arrival of the last packet of the burst data. As shown in FIG. 3, the unit 12 includes a cut-through path setting availability determination unit 22 that determines whether or not a cut-through path up to the next node can be set, and a determination result of the cut-through path setting availability determination unit 22 that the setting is not possible. In this case, a burst data buffer 24 for temporarily accumulating incoming burst data and an IP transfer unit 25 for individually transferring individual packets constituting the burst data accumulated in the burst data buffer 24 according to the IP address thereof. And corresponding to the edge node of the AON. The cut-through path setting unit 12 determines whether or not the cut-through path to the first node corresponding to the edge node of the adjacent other AON can be set. It is in the process of sequentially trying to set the cut-through path to the second and subsequent nodes corresponding to the edge node of.

As shown in FIG. 4, the subsequent burst data amount information is written as the header information of the leading packet, and the burst data head detecting section 11 refers to the subsequent burst data amount information and refers to the burst data. Detect the first packet of. The burst data amount information is packet number information or packet length information that follows the first packet.

As shown in FIG. 5, as the header information of the final packet, information indicating that the packet is the final packet of burst data is written, and the burst data end detection unit 13 uses this final packet. The last packet of burst data is detected by referring to the information indicating that there is a certain information.

The cut-through path setting availability determination unit 22
The presence / absence of a vacant wavelength for setting the cut-through path to the next node is determined, and the cut-through path setting availability determination unit 22 of the node corresponding to the AON edge node,
The presence / absence of a vacant wavelength for setting a cut-through path to the next-stage node corresponding to the edge node of the other AON, and the difference between the allowable transfer rate to the own node and the allowable transfer rate to the next-stage node And are respectively determined.

As shown in FIG. 6, the node sends a signal quality test packet to another node, and a signal quality test packet sending unit 29, and when receiving this packet without signal quality deterioration, its own ID. Signal quality determining unit 30 and signal quality notifying unit 31 that return the packet to the packet sender
And an area calculation unit 32 that calculates an area that does not require 3R processing according to the returned ID.

Next, a cut-through path setting procedure in the optical path network of this embodiment will be described with reference to FIGS. 1 and 7. As shown in FIG. 7, the originating node G1
In order to specify a node group including AON including itself, the signal quality test packet sending unit 29 shown in FIG. 6 sends a signal quality test packet to the nodes G2 to G13. This signal quality test packet is an announcement packet that does not have a specific destination.

The signal quality test packet is received by each of the nodes G2 to G13, and the signal quality determination unit 30 determines the signal quality. At nodes G2-G7, 3R
It is determined that the signal quality does not require processing, and the nodes G8 to G13 determine that the signal quality requires 3R processing. When the signal quality notifying unit 31 determines that the signal quality does not require 3R processing, the node G
Notify 1 to that effect. As a result, node G1
The area calculation unit 32 performs the area calculation based on the notification from the nodes G2 to G7. From this, it is understood that the AON including the node G1 is composed of the nodes G2 to G7. In this way, the AON including the own node is specified.

Note that, in FIG. 7, an example in which the signal quality deteriorates as the distance from the node G1 increases as the distance from the node G1 increases, is shown in FIG. Signal quality may be deteriorated due to various factors such as talk and improper splicing of optical fibers.

In the example of FIG. 1, a cut-through path is set between the originating node A and the terminating node I. The originating node A is included in AON # 1, and the terminating node I is AO.
Included in N # 3, AON # 2 is AON # 1 and AON #
3 and relay. The originating node A transfers the burst data to the node B or C which is the edge node of AON # 1.

Explaining an example in which the node C receives the burst data, the node C attempts the cut-through path setting shown by the broken line for the node E which is the edge node of AON # 2. When the cut-through path shown by the broken line from the node C to E is successful, the cut-through path shown by the broken line from the node E to the node I is set. Also, node C
If the cut-through path setting shown by the broken line from E to E fails, the node C tries to set the cut-through path shown by the alternate long and short dash line to the node D. If the setting of the cut-through path indicated by the alternate long and short dash line from node C to node D is successful, the cut-through path indicated by the alternate long and short dash line from node D to node I is set.

Further, when the nodes C and D fail to set the cut-through path at the node C, the cut-through path is set to another edge node of AON # 2. Or node C and node D
When the cut-through path setting is unsuccessful in both the nodes E and E, the node C notifies the node A to that effect, and the node A sends the burst data to the node B.
It is also possible to set a cut-through path indicated by a solid line from node B to node D.

In this embodiment, if the cut-through path setting fails, the burst data is accumulated in the burst data buffer 24 via the switch 21 at the edge node, and the burst data is stored by the IP transfer unit 25. , IP transfer is performed. Further, even during IP transfer, the setting unit 23 retries to set the cut-through path,
If the cut-through path is successfully set, the burst data accumulated in the burst data buffer 24 will be stored in the switching device 2.
It is sent to the cut-through path via 7. At this time, if speed conversion is necessary, the speed conversion unit 26 can perform speed conversion.

The AON configuration shown in FIG. 1 is an example in which the node A is the originating node, but when another node becomes the originating node, the AON configuration different from that of FIG. 1 is obtained. . Therefore, the AON configuration shown in FIG. 1 is virtually configured, and a different AON is virtually configured for each source node.

The node and the optical path network of this embodiment can be realized by using a computer device which is an information processing device. That is, by installing in a computer device,
An optical path setting unit that sets an optical path according to the IP address of an incoming IP packet, as a function corresponding to a device that controls nodes provided in a plurality of AONs that are closed under the policy that 3R processing is not required. 1 is realized, and functions corresponding to the optical path setting unit 1 include a function corresponding to the burst data head detecting unit 11 for detecting the arrival of the head packet of burst data, and a burst data head detecting unit 11 When the arrival of the first packet of burst data is detected by, the function corresponding to the cut-through path setting unit 12 that sets the cut-through path to the next-stage node, and the burst data end detection unit that detects the arrival of the last packet of burst data. Thirteen
And the burst data end detection unit 13
When the arrival of the last packet of the burst data is detected by, the function corresponding to the cut-through path releasing unit 14 that releases the already set cut-through path after the passage of the last packet is realized, and the cut-through path setting unit 12 is operated accordingly. The function corresponding to the cut-through path setting availability determination unit 22 that determines whether the cut-through path to the next node can be set, and if the determination result of the cut-through path setting availability determination unit 22 is not set, A function corresponding to the burst data buffer 24 for temporarily accumulating the incoming burst data, and an IP transfer unit 25 for individually transferring individual packets constituting the burst data accumulated in the burst data buffer 24 according to the IP address thereof. Realize the corresponding function, As a function corresponding to the cut-through path setting unit 12 in the node corresponding to the edge node, a function of judging whether or not a cut-through path can be set up to the first node corresponding to the edge node of another adjacent AON, and a function of this judgment. When the determination result of No. is not settable, by installing a program for realizing a function of sequentially attempting to set the cut-through path to the second and subsequent nodes corresponding to the edge node of the adjacent other AON into the computer device, The computer device can be a device corresponding to the device for controlling the node of this embodiment.

Further, the program of this embodiment has a function corresponding to the signal quality test packet sending unit 29 for sending the signal quality test packet to another node when installed in the computer device. When this packet is received without signal quality deterioration, a function corresponding to the signal quality determination unit 30 and the signal quality notification unit 31 which returns its own ID to the source of the packet,
A function corresponding to the area calculation unit 32 that calculates an area that does not require the 3R processing is realized according to the returned ID.

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,
It is possible to realize a node and an optical path network that can reduce the labor and time required for setting a cut-through path and the invalid hold.

[0047]

As described above, according to the present invention,
It is possible to reduce the labor and time required for setting the cut-through path and the invalid hold.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical path network according to an embodiment.

FIG. 2 is a block configuration diagram of an optical path setting unit according to the present embodiment.

FIG. 3 is a block configuration diagram of a cut-through path setting unit of this embodiment.

FIG. 4 is a configuration diagram of a burst head packet according to the present embodiment.

FIG. 5 is a configuration diagram of a burst final packet according to the present embodiment.

FIG. 6 is a block configuration diagram of a node according to the present embodiment.

FIG. 7 is a diagram for explaining an AON configuration procedure.

[Explanation of symbols]

1 Optical path setting section 11 Burst data start detector 12 Cut-through path setting section 13 Burst data end detector 14 Cut-through path release section 21, 27 switch 22 Cut-through path setting availability judgment unit 23 Setting section 24 burst data buffer 25 IP transfer unit 26 Speed converter 29 Signal quality test packet transmitter 30 Signal quality judgment unit 31 Signal quality notification section 32 area calculator A to I, G1 to G13 nodes # 1 to # 3 AON

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kohei Shiomoto             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation F-term (reference) 5K030 GA01 JL03 KX20 LB08

Claims (13)

[Claims] 1. A plurality of nodes are 3R (Reshaping; Retiming
ing; Retransrating) processing is not required, and a plurality of closed AONs (All Optical Networks) are configured respectively, and this node provides a means for setting an optical path according to the IP address of an incoming IP packet. The means for setting this optical path includes means for detecting the arrival of the first packet of the burst data, and when the arrival of the first packet of the burst data is detected by this detecting means, the cut-through path is set to the next node. A cut-through path setting means for setting, a means for detecting arrival of the last packet of burst data, and when the arrival of the last packet of burst data is detected by this detecting means, the cut-through path already set is used for the last packet. A cut-through path releasing means for releasing after the passage, The looper setting means determines whether or not a cut-through path to the next node can be set, and temporarily stores incoming burst data when the determination result of this determination means is not set, The cut-through path setting means in the node corresponding to the edge node of the AON, comprising: an IP transfer means for individually transferring each packet constituting the burst data accumulated in the accumulating means according to its IP address. A means for determining whether or not a cut-through path to the first node corresponding to the edge node of another adjacent AON can be set, and an edge node of the other adjacent AON if the determination result of this determination means is not settable And means for sequentially trying to set cut-through paths to the second and subsequent nodes corresponding to Optical Networks characterized. 2. The header information of the first packet,
2. The subsequent burst data amount information is written, and the means for detecting the arrival of the leading packet comprises means for detecting the leading packet of the burst data by referring to the subsequent burst data amount information. Optical network. 3. The optical path network according to claim 2, wherein the burst data amount information is packet number information or packet length information subsequent to the head packet. 4. The header information of the final packet,
The information indicating that the packet is the last packet of burst data is written, and the means for detecting the arrival of the last packet refers to the information indicating that the last packet is the last packet of the burst data. The optical path network according to claim 1, further comprising means for detecting 5. The means for judging whether or not the setting is possible comprises a means for judging whether or not there is a vacant wavelength for setting a cut-through path to a node at the next stage, and the setting of a node corresponding to an edge node of AON. The presence / absence of a vacant wavelength for setting a cut-through path to the next-stage node corresponding to the edge node of the other AON, the allowable transfer rate to the own node, and the next-stage node The optical path network according to claim 1, further comprising means for determining a difference from the allowable transfer rate up to the above. 6. The node comprises means for transmitting a signal quality test packet to another node, and means for returning its own ID to the source of the packet when the packet is received without signal quality deterioration. The optical path network according to claim 1, further comprising means for calculating an area not requiring 3R processing according to the returned ID. 7. A signal quality test packet is sent from one node to another node, and the other node that receives this packet without signal quality deterioration returns its own ID to the node, and the node sends this reply. 3R by receiving
AON closed under the policy that 3R processing is not required by examining areas that do not require processing.
An AON configuration method comprising: 8. The AON configuration method according to claim 7, wherein the AON is virtually configured, and different AONs are virtually configured for each source node. 9. A plurality of AONs, which are closed under the policy of not requiring 3R processing, are provided with means for setting an optical path according to the IP address of an incoming IP packet, and this optical path is set. The means includes means for detecting arrival of the first packet of the burst data, and cut-through path setting means for setting the cut-through path to the next-stage node when the arrival of the first packet of the burst data is detected by the means for detecting. Means for detecting the arrival of the last packet of burst data, and cut-through path releasing means for releasing the already set cut-through path when the arrival of the last packet of burst data is detected by this detecting means. And the cut-through path setting means is Means for determining whether or not a cut-through path can be set up to the current mode, a means for temporarily accumulating incoming burst data when the result of this determination means is not set, and a burst accumulated in this means for temporarily accumulating. IP cut-off means for individually transferring individual packets forming data according to the IP address, and the cut-through path setting means in the node corresponding to the edge node of the AON is connected to an edge node of another adjacent AON. Means for judging whether or not the setting of the cut-through path to the corresponding first node can be made, and if the judgment result of this judging means is not set, the second and subsequent nodes corresponding to the edge node of the adjacent other AON And a means for sequentially trying the setting of cut-through paths up to. 10. A means for transmitting a signal quality test packet to another node, a means for returning its own ID to the source of the packet when the packet is received without signal quality deterioration, and the returned ID. 10. A node according to claim 9, comprising means for calculating areas that do not require 3R processing according to. 11. A function corresponding to a device which is installed in an information processing device and controls nodes provided in a plurality of AONs closed under the policy that the 3R processing is not required in the information processing device. As a function to set the optical path according to the IP address of the incoming IP packet, the function to set the optical path is to detect the arrival of the first packet of burst data and to detect the burst data by this function. When the arrival of the first packet of is detected, the cut-through path setting function that sets the cut-through path to the next node, the function of detecting the arrival of the last packet of burst data, and the last packet of the burst data are detected by this function. Is detected, the cut-through already set A cut-through path release function that releases a path after passing the final packet is implemented, and as the cut-through path setting function, a function that determines whether or not a cut-through path to the next-stage node can be set, and a determination result of this determination function When is not settable, the function of temporarily accumulating the incoming burst data and the IP transfer function of individually transferring the individual packets constituting the burst data accumulated in the function of temporarily accumulating according to the IP address are provided. And a function of determining whether or not a cut-through path can be set up to the first node corresponding to an edge node of another adjacent AON, as the cut-through path setting function in the node corresponding to the edge node of the AON. If the determination result of the determination function cannot be set, the adjacent other AO A program that realizes a function of sequentially trying to set cut-through paths to second and subsequent nodes corresponding to N edge nodes. 12. A function of transmitting a signal quality test packet to another node, a function of returning its own ID to the packet transmission source when the packet is received without deterioration of signal quality, and the returned ID. 12. The program according to claim 11, which realizes a function of calculating an area that does not require 3R processing according to. 13. A recording medium readable by the information processing device, wherein the program according to claim 11 or 12 is recorded.