JP2003258874A - Packet switch and optical switch integrated control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new device which realizes cooperating operation between an optical path network and a packet/cell transfer network. <P>SOLUTION: The device is provided with: a management means for managing state information of the packet/cell transfer network a management means for managing state information of the optical path network, a means for collecting network state information from another node according to a specific protocol and registering it to a corresponding management means, a means for collecting network state information from its own node and registering it to a corresponding management means, and a means for advertising the network state information connected from its own node according to the specific protocol to integrally manage the two pieces of network state information. Then, this device performs processing so as to decide a route for transferring a packet, cell and optical path by searching a transfer route at a lowest cost by allowing the two pieces of network state information to be managed integrally, to be inputted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-capacity optical path network realized by an optical cross connect device and an IP.
The present invention relates to a packet switch / optical switch integrated control device that realizes a cooperative operation with a packet / cell transfer network realized by a Layer 2/3 switch such as a router.

[0002]

2. Description of the Related Art Due to an increase in data communication traffic such as the Internet, a node device having a throughput of Tbit / s at present and 10-100 Tbit / s or more in the near future is being introduced.

The mainstream communication protocol on the Internet is the TCP / IP protocol. This IP protocol basically has only a function of dividing communication data into packets and a function of giving a source address and a destination address to the divided packets, which is a so-called best effort service in which quality is not guaranteed. It is provided. However, with the spread of the Internet, it is beginning to be required by the user side that the Internet has the ability to transfer real-time data such as images and voices with high quality.

On the other hand, Internet service providers also
There is an increasing need to provide high-quality Internet services while responding to the rapid increase in communication traffic that is said to double in half a year. However, conventionally, as shown in FIG. 10, a current IP network (packet cell transfer network) is provided in a form in which an IP router network is overlaid on an SDH path or an optical path network. Resource management of layers is performed by individual control systems.

In FIG. 10, reference numeral 100 denotes a packet cell switch (PSC: Packet Switch Capable) that performs routing processing in IP packet units, and 101 denotes an optical switch (LSC: L) that performs routing processing in wavelength path units.
ambda Switch Capable) and 102 are fibers that connect the optical switches 101 to each other.

The network shown in this figure is called a packet cell transfer network composed of a packet cell switch 100 and an optical path, and an optical path network composed of an optical switch 101 and a fiber link accommodating the optical path. A packet cell switch 100 configured by a multi-layer network and processing a TCP / IP protocol which is a mainstream communication protocol on the Internet;
A network having a large-scale transfer capability is realized by operating in cooperation with the optical switch 101 that performs an optical path routing process.

[0007]

As described above, the conventional I
The P network is provided in a form in which the IP router network is overlaid on the SDH path or the optical path network, and resource management of each layer is performed by an individual control system. Therefore, there is a problem in that the traffic accommodation design is also performed for each layer, resulting in redundant network resources, and it is difficult to secure the speed of service provision.

The present invention provides a means for solving such a problem, and provides a concrete means for integrally managing resource information of an IP layer network and an optical layer network, which have been managed separately until now. Is. At the same time, with the establishment of an optical path based on a certain policy,
It is intended to provide a means for realizing both of the provision of an optical path whose conditions are flexibly changed while considering the resources of the IP layer and the optical layer.

[0009]

In order to achieve this object, a packet switch / optical switch integrated control apparatus of the present invention comprises a packet / cell switch unit for transferring packets or cells and an optical switch unit for exchanging optical paths. In order to perform integrated management of the packet switch and the optical path, the first management means for managing the state information of the packet cell transfer network and the fiber link accommodating the optical switch and the optical path are provided. The second management means for managing the status information of the configured optical path network, the status information managed by the first management means, and the status information managed by the second management means are input to the packet cell and the Collects packet / cell transfer network state information from other nodes according to a deciding means for deciding a route to transfer the optical path and a prescribed protocol. And registers the first management means, and first registration means for registering the second management means collects light path network status information from other nodes,
Second registration means for collecting packet / cell transfer network status information from the own node and registering it in the first managing means, and collecting optical path network status information from the own node and registering it in the second managing means In accordance with the specified protocol, the packet / cell transfer network state information collected from the own node is advertised to other nodes,
It is configured to include an advertising means for advertising the optical path network status information collected from the own node to other nodes, and a collecting means for collecting the traffic status of the network.

In the packet switch / optical switch integrated control apparatus of the present invention configured as described above, the packet / cell transfer network state information of the own node and other nodes is registered in the first managing means, and the own node and other nodes are registered. By registering the optical path network status information on the optical path network in the second management means, the first management means allows the first management means to manage packets such as optical path availability information / cost information and status information / cost information of the packet / cell switch unit. -The second management means manages the status information of the optical path network such as the vacant information / cost information of the fiber link, the status information / cost information of the optical switch section, and the status information of the cell transfer network. become.

In response to this, the multiplying means receives (a) the cost information of the optical path managed by the first managing means, multiplies the cost information by the weighting coefficient β1, and the second managing means. The cost information of the managed fiber link is input, and the cost information is multiplied by the weighting factor β2. (B) The cost information of the optical path managed by the first managing means and the packet cell switch. Cost information of the unit, the cost information is multiplied by a weighting factor β1 and a weighting factor γ1, respectively, and the cost information of the fiber link managed by the second management unit and the cost information of the optical switch unit are input. Then, the cost information is multiplied by the weighting coefficient β2 and the weighting coefficient γ2, respectively.

Upon receiving the multiplication result of the multiplying means, the determining means determines the route for transferring the packet cell and the optical path by searching the transfer route of the minimum cost with the multiplication result as an input.

As described above, according to the packet switch / optical switch integrated control apparatus of the present invention, the packet / cell transfer network and the optical path network, which are separately managed in the prior art, can be routed in an integrated manner. As a result, not only IP packet transfer but also new / deleted optical path and routing can be realized in an integrated manner in response to changes in the network state. When adopting this configuration, the multiplying unit changes (a) either or both of the weighting factors β1 and β2 in accordance with the traffic state information collected by the collecting unit,
(B) A part or all of the weighting factors β1, β2, γ1, γ2 are changed according to the traffic state information collected by the collecting means, or (c) a packet / cell switch managed by the first managing means. Either or both of the weighting factors γ1 and γ2 are changed according to the state information of the optical switch unit and the state information of the optical switch unit managed by the second management unit. May be processed.

(B) Due to the function of changing the weighting coefficient of the multiplication means, for example, when there is a sufficient empty wavelength band in the optical path network, (β1 × optical path cost)> (β2 × fiber link cost ) By changing the weighting factors β1 and β2 so that
It is easy to establish a new optical path, and conversely, if the empty wavelength band of the optical path network is not sufficient, (β1 × optical path cost) <(β2 × fiber link cost) By changing β1 and β2,
It becomes possible to perform processing such as establishing an optical path according to the traffic state of the network, such as making it difficult to establish an optical path.

(B) The weighting factor changing function of the multiplication means reduces the weighting factor β2 (lowers the fiber link cost) and reduces the weighting factor γ2 (for example, when the traffic is light). By lowering the cost of the optical switch unit), it becomes easier to construct a new optical path, and conversely, in a state where there is a lot of traffic, the weight coefficient β2 is increased and the weight coefficient γ2 is increased.
By increasing the value, it becomes possible to perform processing such as newly establishing an optical path according to the traffic state of the network, such as making it difficult to newly establish an optical path.

(C) Further, when the ability of the optical switch section is ample due to the function of changing the weighting coefficient of the multiplying means, the values of the weighting coefficients γ1 and γ2 are changed so that a new optical path can be established. On the contrary, in the case where most of the capability of the optical switch unit, especially the wavelength converting capability is consumed, by changing the values of the weighting factors γ1 and γ2,
It becomes possible to perform a process of newly establishing an optical path according to the state information of the packet / cell switch unit or the optical switch unit, such as making it difficult to newly establish a path.

Thus, according to the packet switch / optical switch integrated control apparatus of the present invention, a new optical path is established based on a certain policy, and resources of the packet / cell transfer network layer and the optical path network layer are allocated. It will be possible to realize both the new construction of the optical path whose conditions are changed flexibly while considering it.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail according to embodiments.

(1) First Embodiment Example FIG. 1 illustrates a first embodiment example of a packet switch / optical switch integrated control apparatus 1 according to the present invention.

As shown in the figure, the packet switch / optical switch integrated control apparatus 1 of the present invention has a flooding section 10, a link status DB 11, and an extended link status DB.
12, a Switching Capability monitoring unit 13, a route calculation unit 14, and a Next Hop DB 15.

The flooding unit 10 is a functional unit for notifying adjacent nodes of the link status information collected from the own node and other nodes. The link status DB 11 and the extended link status DB 12 are databases that hold link information collected from other nodes, and the link status DB 1
1 stores optical path link status information, and extended link status DB 12 stores fiber link status information.

Here, the optical path link status information stored in the link status DB 11 specifically means the optical path link that connects two packet cell switches (PSCs) and is accommodated in a fiber link. This is information such as vacancy information and cost information. As the cost of the optical path link, a value such as the reciprocal of the transmission speed of the optical path or the product of the sum of the cost of the fiber links accommodating the optical path and a certain constant is assigned.

On the other hand, the fiber link status information stored in the extended link status DB 12 is, specifically, vacant information and cost information of a fiber link connecting two optical switches. As the cost of this fiber link, values such as the distance between fibers, the reciprocal of the capacity of the fiber link (the reciprocal of the number of optical paths that can be accommodated), and the cost required for actual construction are assigned.

The Switching Capability monitoring unit 13 is a functional unit that monitors the switching status of its own node. That is,
The SW of its own node not only has the function of setting the logical electric path to PSC and the optical path to LSC,
Grasps the remaining resources of the node and advertises it to other nodes. For example, in the case where the SW of the own node has not only the function of transferring the optical path to the other node by using the LSC but also the function of terminating the optical path at the PSC of the own node and transferring to the other node in packet units, , The total number of IFs and the unused number are advertised to other nodes.

The route calculation unit 14 sets an optical label switch path (OLSP: optical path illustrated in FIG. 10) set from the link state DB 11 and a label switch path switched by PSC (LSP: illustrated in FIG. 10). Logical path) or packet transfer route calculation.

The Next Hop DB 15 is a DB in which the result of the route calculation result is stored. To reach each node, which IF transfers the packet or the optical path (the optical path is set and the packet is transferred). ) Stores information such as what to do.

The packet switch / optical switch integrated control apparatus 1 of the present invention according to this embodiment example uses the packet cell switch (PSC) and the optical path link to realize the state information of the packet cell transfer network (the above-mentioned optical (Path link state information) and the state information of the optical path network (the above-mentioned fiber link state information) realized by the optical switch (LSC) and the fiber link, as a function of collecting the OSPF protocol [Reference: IETF RFC1131 / 1247]. /
1573] is used.

According to this protocol, as shown in FIG. 2, for each packet switch / optical switch integrated control device 1, optical path link state information (packet switch) connected to the packet cell switch (PSC) of its own node is transmitted. Cell transfer network status information) and the optical switch (LS) of its own node
The fiber link status information (optical path network status information) connected to C) is advertised to the packet switch / optical switch integrated control device 1 of another node. At the same time, the optical path link status information and the fiber link status information advertised from other nodes are collected.

As shown in FIG. 2, the above-mentioned optical path link state information is stored in a Router LSA packet of the OSPF protocol and exchanged between the nodes, and the data received by each node is the link state DB 11 (packet NW). -DB). The information stored in the link status DB 11 can be synchronized with the link status DB stored in the conventional IP router connected to the packet switch / optical switch integrated node.

On the other hand, the above-mentioned fiber link status information is
As shown in FIG. 2, the data exchanged by the Opaque LSA packet of the OSPF protocol [Reference: IETF 2370] and received by each node is the extended link state DB 12 (optical NW-
It is stored in DB).

According to the present embodiment, the extended link status D
Each fiber link state information stored in B12 holds data that indicates which wavelength is the usable band on each fiber link path.

From this, as shown in FIG. 3, it is possible to eliminate in advance the fiber link having no vacant wavelength band when calculating the route of the optical path when calculating the route.

In addition to this, since it is possible to specify the used band of each fiber link when calculating the route of the new optical path, it is possible to confirm the available band required for each fiber link when the new optical path is established. It becomes possible to omit work.

Further, since the wavelengths from the start point node to the end point node can be designated in advance, it is possible to avoid the route selection such as wavelength conversion from λ1 to λ3 at the intermediate node. This makes it possible to reduce the quantity of wavelength converters required in each LSC.

(2) Second Embodiment Example FIG. 4 shows a second embodiment example of the packet switch / optical switch integrated control apparatus 1 according to the present invention.

In the present embodiment, in addition to the configuration of the first embodiment, the link status DB 11 and the extended link status D
The function is expanded in the route calculation unit 14 that accesses both of B12.

When the present embodiment is followed, the route calculation unit 14
Is a multiplication function unit 1 that multiplies the cost of the optical path link managed by the link state DB 11 by the weighting factor β1.
40, and a multiplication function unit 141 that multiplies the cost of the fiber link managed by the extended link state DB 12 by the weighting factor β2, and the minimum cost route calculation unit 142 that performs the minimum cost route calculation is Based on these output results, the routing route of the packet cell and the optical path accommodating them is calculated.

This minimum cost route calculation unit 142 uses Dijk
stra algorithm (reference: data structure and algorithm
AV Eiho et al., Baifukan (ISBN4-563-00791-9), page 179) provides the least cost routing between the packet switch / optical switch integrated control device 1 and the IP routers (packet / cell switch) connected to them. It has a function to search for a route.

According to this embodiment, the link status DB1
1 has a processing function of multiplying the cost information of the optical path link managed by 1 by the weighting factor β1 and multiplying the cost information of the fiber link managed by the extended link state DB 12 by the weighting factor β2. By
In the prior art, it is possible to integrally route the packet cell transfer network and the optical path network, which are separately managed.

FIG. 5 and FIG. 6 show the states of the route calculation processing realized by this embodiment.

The minimum cost route calculation unit 142 is shown in FIG.
As shown in, the weighting coefficient β1 is multiplied to the cost information of the optical path link managed in the link status DB11, and the weighting coefficient β2 is multiplied to the cost information of the fiber link managed in the extended link status DB12. Multiply,
The multiplication result is used to search for the routing path with the minimum cost.

Here, in this example, the weighting factor β1 is "1".
The value of “0 ³ × D” and the weighting factor β2 are values of “1” to “10.” The cost of the optical path link multiplied by β1 is the bandwidth Bw (bit) of the optical path link. / s) is defined as 10 ⁸ / Bw (the reciprocal of the bandwidth Bw multiplied by 10 ⁸ ), and the cost of the fiber link multiplied by β 2 is the distance D of the optical fiber link.
This is because it is defined in the form of (km) and it is necessary to match the dimensions of the cost information of both.

FIG. 6 shows an example of each link status / cost information obtained when the cost information is set in such a form.

For example, as shown in the Stat table, the attribute information PSC, that is, the optical path set between PSCs has already been registered from IF-1 to Node 2 and Node 3. The cost of x * β1 (*:
Multiplication), (x + y) * β1. Here, the distance of each fiber link section is input as x and y. On the other hand, regarding a fiber link having a band in which an optical path is not set, link information of cost y * β2 exists, for example, in the section between IF-3 and IF-4.

Here, "P = 2" shown in the figure indicates that the number of empty packet cell switches (PLC) is 2, and "L = 2" indicates the number of empty optical switches (LSC). Indicates that is 2.

On the other hand, as shown in the Capability table, each node has its own LSC-IF.
And the number of PSC-IF resources is also advertised.

Based on these data, is it advantageous in terms of cost to go through an existing optical path link, or is it advantageous in terms of cost to install a new optical path in a fiber link? Determine whether From these calculation results, the Next Hop DB 15 is created, and the Next Hop information indicating which output IF the packet or the optical path should be transferred to reach the final destination is registered.

In the actual transfer of the packet and the optical path, this Ne containing the end node ID of the traffic concerned is transferred.
The relevant traffic input to the packet switch / optical switch integrated control device 1 by searching the xt Hop DB 15 is the end node ID of these traffics.
Is transferred to the registered IF.

FIG. 7 shows an example of a series of these operations.

Now, P of Node # 1 to Node # 5 in FIG.
It is assumed that an instruction is issued from Node # 1 so as to set a logical path called a label switch path (LSP) between SCs. This LSP is virtual and is assigned to a specific flow of the IP packet.

As a result of the above route search, this LSP is
Between Node # 1 and Node # 2, the existing optical path link is accommodated, and between Node # 2 and Node # 4, an optical path link is newly established and accommodated in the empty wavelength band of the fiber link. The existing optical path link is accommodated between Node # 4 and Node # 5.

The sequence shown in the lower part of FIG. 7 is a control signal sequence diagram for performing such an operation.

That is, when performing such an operation, N
For the ode # 1 to the node # 2, the LSP band is provisionally reserved using the residual band of the existing optical path link. In response to this,
In Node # 2 to Node # 4, the remaining bandwidth of the fiber link is used to provisionally reserve the optical path. If provisional reservation of the optical path link can be realized up to Node # 4, Node # 4 to Node # 4
Secure an optical path toward e # 2.

Then, using this optical path band, Nod
Temporarily reserve the LSP band from e # 2 to Node # 4. Furthermore, by using the existing optical path link, Nodes # 4 to N
The LSP band is tentatively reserved up to ode # 5. And Node
If you can confirm the temporary reservation of LSP band up to # 5,
The temporary reserved bandwidth of the LSP set in a series of processes from 5 to Node # 1 is secured.

By such processing, integrated and quick communication traffic transfer can be realized between networks of different layers such as a packet cell transfer network and an optical path network.

With such a configuration, it is possible to integrally implement not only the transfer of IP packets but also the establishment / deletion of optical paths and the routing in accordance with changes in traffic and network conditions.

(3) Modification of Second Embodiment Next, a modification of the second embodiment of the packet switch / optical switch integrated control apparatus 1 according to the present invention will be described.

In this modified example, similar to the second embodiment, when referring to the minimum cost route in consideration of both the cost of the optical path link and the cost of the fiber link,
The cost of the optical path link is multiplied by the weighting factor β1,
The cost of the fiber link is multiplied by the weighting factor β2.

Here, the values of the weighting factors β1 and β2 are “1” for the weighting factor β1 and the weighting factor β2 in this example.
For, the value of "(1-10) x Bo, w / 10 ⁸ " is used. This is defined in the form of β1 bandwidth Bw of cost the optical path link for a light path links that are multiplied (bit / s) with respect to 10 ⁸ / Bw (multiplied by the reciprocal ¹⁰⁸ of the bandwidth Bw) This is because the cost of the fiber link multiplied by β2 is defined in the form of the bandwidth Bo, w that occupies the optical fiber link, and the dimensions of the cost information of both need to match.

The values of these weighting factors β1 and β2 may be changed according to the traffic condition of the entire network. For example, when there are sufficient empty wavelength bands in the LSC layer, (β1 × optical path link cost)> (β2 × fiber link cost) in order to facilitate new installation of an optical path. And weighting factors β1 and β2 are set, and conversely, if the empty wavelength band is not sufficient, in order to make it difficult to construct an optical path, (β1 × optical path link cost) < Processing such as setting the weighting factors β1 and β2 so as to be (β2 × fiber link cost) may be performed.

That is, a new optical path can be installed according to the state of the network. Here, the weighting factors β1 and β2 may be changed according to the priority class of the logical path to be stored.

(4) Third Embodiment Example FIG. 8 shows a third embodiment example of the packet switch / optical switch integrated control apparatus 1 according to the present invention.

In this embodiment, as in the case of the second embodiment, when referring to the minimum cost route that takes into account both the cost of the optical path link and the cost of the fiber link, the link state In addition to multiplying the cost of the optical path link managed by DB11 by the weighting factor β1, and multiplying the cost of the fiber link managed by DB12 by the weighting factor β2, the link state The cost of the packet / cell switch managed by the DB 11 is multiplied by the weighting factor γ1, and the cost of the optical switch managed by the extended link state DB 12 is multiplied by the weighting factor γ2. .

That is, in the case of following this embodiment,
The cost of the optical path link is multiplied by the weighting factor β1, the cost of the packet / cell switch is multiplied by the weighting factor γ1, and the cost of the fiber link is multiplied by the weighting factor β2. In addition, the cost function of the optical switch is multiplied by the weighting coefficient γ2 and the multiplication function section 144 is provided. The minimum cost path calculation section 142 determines the packet cells and the routing paths of the optical paths accommodating them from the output results. It will be calculated.

Here, as the values of the weighting factors γ1 and γ2, values of 1 to 10 are often used. The weighting factors γ1 and γ2 are used to give the cost ratio between the packet cell switch and the optical switch.

By changing the values of the weighting factors γ1 and γ2, it becomes possible to change the ease of establishing an optical path while considering the node state (state of packet / cell switch or state of optical switch). .

For example, when the LSC has abundant ability,
By changing the values of the weighting factors γ1 and γ2, it is possible to easily change the optical path. On the contrary, when most of the LSC capability, particularly the wavelength conversion capability, is consumed, the weighting factors γ1 and γ2 are changed to make it difficult to newly construct an optical path. be able to. That is, it is possible to newly install an optical path according to the load state of each PSC / LSC. Here, the weighting factor γ1,
γ2 may be changed according to the priority class of the logical path to be accommodated.

(5) Fourth Embodiment FIG. 9 shows a fourth embodiment of the packet switch / optical switch integrated control apparatus 1 according to the present invention.

In this embodiment, the traffic information collecting unit 16 is provided and its output is inputted to the multiplying function units 143 and 144 of the route calculating unit 14.

The traffic information collecting unit 16 has a function of collecting the traffic state of each node, and by grasping the traffic congestion state of the own node or the entire network, the existing optical path link cost and the fiber link cost can be calculated. Cost weighting, and changing the cost weighting between the packet / cell switch cost and the optical switch cost.

Here, the packet / cell switch cost is managed by the link state DB 11, and the optical switch cost is managed by the extended link state DB 12. For example, when the packet traffic is extremely low, the fiber link cost and the optical switch cost are reduced to facilitate the establishment of an optical path, and β1 = 1, β2 = 0.1 × Bo, w / 10 ⁸ , γ1 = 1, γ
By setting a value such as 2 = 0, while increasing the fiber link cost and the optical switch cost in order to make it difficult for the new optical path to be established in a state where there is a lot of packet traffic, β1 = 1, β2 = 10 × Bo, w / 10 ⁸ , γ1 = 1, γ
Set a value such as 2 = 2.

As described above, according to the present embodiment, it is possible to change the usage method of the optical path according to the network state.

[0073]

According to the present invention, it is possible to quickly set / delete an optical path according to a change in traffic demand, and to optimize an optical path set in the entire network and a logical path accommodated therein. It is easier to plan dynamically. As a result, it is possible to improve the service accommodation efficiency in the entire network.

Further, according to the present invention, as a result of the enhanced cooperation between the IP layer and the optical layer, it becomes possible to provide a large capacity communication service having excellent fault tolerance.

[Brief description of drawings]

FIG. 1 is a first embodiment example of the present invention.

FIG. 2 is an example of an advertisement process of optical path link status information and fiber link status information according to the present invention.

FIG. 3 is an explanatory diagram of a route selection process performed by the present invention.

FIG. 4 is a second embodiment example of the present invention.

FIG. 5 is an explanatory diagram of a route calculation process performed by the present invention.

FIG. 6 is an explanatory diagram of a route calculation process performed by the present invention.

FIG. 7 is an explanatory diagram of a label switch path setting process performed by the present invention.

FIG. 8 is a third embodiment example of the present invention.

FIG. 9 is a fourth embodiment example of the present invention.

FIG. 10 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

1 Packet switch / optical switch integrated control device 10 flooding section 11 Link status DB 12 Extended link status DB 13 Switching Capability Monitor 14 Route calculator 15 Next Hop DB

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Daisaku Shimazaki             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation (72) Inventor Naoaki Yamanaka             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation F term (reference) 5K030 GA20 HA08 JA12 KX20 LA17                       LB05 MB09                 5K102 AA11 AD12 MB11 MD04 NA08                       RB11

Claims (7)

[Claims] 1. A packet for transferring a packet or a cell,
A packet switch / optical switch integrated control device for integrally managing a cell switch unit and an optical switch unit for exchanging optical paths, which is capable of displaying status information of a packet / cell transfer network composed of packet cell switches and optical paths. A second management unit for managing state information of an optical path network including an optical switch and a fiber link accommodating an optical path; and a state managed by the first management unit. Packet switch / optical switch integrated control, characterized by comprising: determining means for determining a route for transferring a packet cell and an optical path by inputting information and state information managed by the second managing means. apparatus. 2. The packet switch / optical switch integrated control device according to claim 1, wherein the cost information of the optical path managed by the first managing means is input, and the cost information is multiplied by a weighting factor β1. The cost information of the fiber link managed by the second management means is input, and the cost information is multiplied by a weighting factor β2. The determining means includes the multiplication result of the multiplying means as an input and the minimum cost. By searching the transfer route of
A packet switch / optical switch integrated control device characterized by determining a route for transferring a cell and an optical path. 3. The packet switch / optical switch integrated control device according to claim 2, further comprising a collecting unit that collects network traffic state information, wherein the multiplying unit responds to the traffic state information.
A packet switch / optical switch integrated control device, characterized in that one or both of the weighting factors β1 and β2 are changed. 4. The packet switch / optical switch integrated control device according to claim 1, wherein the cost information of the optical path managed by the first management means and the cost information of the packet / cell switch unit are input. Weighting coefficient β1 and weighting coefficient γ are included in the cost information, respectively.
Multiplying means for multiplying 1 by inputting the cost information of the fiber link and the cost information of the optical switch unit managed by the second managing means, and multiplying the cost information by the weight coefficient β2 and the weight coefficient γ2, respectively. The determining unit searches for a transfer route with a minimum cost by using the multiplication result of the multiplying unit as an input,
A packet switch / optical switch integrated control device characterized by determining a route for transferring a cell and an optical path. 5. The packet switch / optical switch integrated control device according to claim 4, wherein the multiplying unit includes state information of a packet / cell switch unit managed by the first managing unit, and the second managing unit. The weighting factors γ1 and γ2 according to one or both of the state information of the optical switch unit managed by the means.
A packet switch / optical switch integrated control device characterized by changing one or both of the above. 6. The packet switch / optical switch integrated control device according to claim 4, further comprising: a collection unit that collects network traffic state information, wherein the multiplication unit responds to the traffic state information.
A packet switch / optical switch integrated control device, characterized in that a part or all of the weighting factors β1, β2, γ1, γ2 are changed. 7. The packet switch / optical switch integrated control device according to claim 1, wherein the network status information is collected from another node according to a prescribed protocol, and the corresponding management means is provided to the corresponding management means. A means for registering, a means for collecting the network status information from the own node and registering it in the corresponding management means, and a means for advertising the network status information collected from the own node to another node according to a prescribed protocol. A packet switch / optical switch integrated control device characterized by being provided.