JP2015012589A - Optical multi-layer network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have an optical multi-layer network system cope with a lot of protocols.SOLUTION: An optical multi-layer network system 1 includes a plurality of optical edges 11 that are communicatively connected with each other via an optical path 13 and are termination points of one or multiple services, and achieves each service virtual slice corresponding to each service, such as an IP emulation slice 14a, Ethernet emulation slice 14b, and an ATM emulation slice 14c.

Description

  The present invention relates to an optical multilayer network system including one or a plurality of virtual slices.

FIGS. 9A and 9B are diagrams showing a virtual slice network 1E of a comparative example. FIG. 9A shows the relationship between the physical network 3 and the virtual slice network 1E. FIG. 9B shows the relationship between the virtual slice network 1E and the other network 2. This other network 2 constitutes an autonomous system.
As shown in FIG. 9A, the physical network 3 of the comparative example includes a plurality of physical nodes 31. The physical network 3 can be logically provided as a plurality of virtual slice networks 1E. Here, the slice refers to a virtual network that is created on a virtual infrastructure and is abstracted and structured. In each part constituting each virtual slice network 1E, a physical node (router or the like) unnecessary for each part cannot be seen, and a virtual router 15 or the like that is a node necessary for each part can be seen. Thereby, the virtual slice network 1E can isolate the resources and the amount (bandwidth, etc.) used by the virtual slice network 1E from the other virtual slice networks 1E so as not to receive interference.

A physical router that is one of the physical nodes 31 is provided as a plurality of virtual routers 15 to each virtual slice network 1E. One physical link of the physical network 3 is supplied to the virtual slice network 1E as a plurality of virtual links.
The overlaid virtual slice network 1E only needs to be designed based on the resources required by itself, and can have efficient scalability. In addition, it is possible to give a degree of freedom independently by logically dividing resources between itself and another virtual slice network 1E.

  As shown in FIG. 9B, the virtual slice network 1E is configured across a plurality of other networks 2. Each other network 2 is an autonomous system called AS (Autonomous System), and constitutes a slice. The plurality of slices are connected to each other to form one virtual slice network 1E.

  In Non-Patent Document 1, “How to refer to and define a connection for connecting a slice to an external network (accommodating an external network in a slice) is defined and how it is converted by a slice developer. And describes whether the communication is realized. ”,“ Using the network accommodation device (NACE, NC) to convert the packet data format to the external network, the slice is converted to the external VLAN network. Can be connected at a maximum of 10 Gbps. "

Yasushi Kanada, Satoshi Shiraishi, Akihiro Nakao, “Functions for connecting between virtual nodes and slices to external networks in network virtualization infrastructure”, IEICE technical report, IEICE, October 11, 2012 112, 230, 103-108

However, on the virtual slice network of Non-Patent Document 1, the data format is limited to Ethernet (registered trademark). In order to support other protocols, it is necessary to design a rule for converting the packet data format related to the protocol to Ethernet, and thus it is difficult to support many protocols.
The present invention has been made in view of such a background, and an object of the present invention is to provide an optical multilayer network system that can support many protocols.

  In order to solve the above-mentioned problem, according to the first aspect of the present invention, there is provided a plurality of optical edges that are communicably connected to each other via an optical path and terminate one or more services, and each of the services is provided. An optical multi-layer network system characterized by realizing each service virtualization slice.

  In this way, according to the present invention, since a service virtualization slice corresponding to each protocol may be realized, it is possible to easily cope with many protocols.

  The invention according to claim 2 is characterized in that the optical multilayer network system itself constitutes a single autonomous system or constitutes a part of the autonomous system. The optical multilayer network system described in 1.

  By doing so, the optical multilayer network system may function as a single autonomous system, or may constitute an autonomous system together with other networks and function as a part of this autonomous system. The function of the autonomous system can be suitably realized.

  According to a third aspect of the present invention, the optical edge is a service terminating unit that terminates each service, a switch unit that distributes service information according to the type of service, and the service information is transferred to another optical edge. The optical multilayer network system according to claim 1, further comprising an optical MAC (Media Access Control) unit.

  In this way, according to the present invention, since each service is hierarchized within the optical edge, each service can easily cope with many protocols without interfering with each other.

  4. The optical multi-layer network system according to claim 3, wherein, when the service termination unit receives the service information from another optical edge, the service termination unit transfers the service information to the outside. It was.

  In this way, according to the present invention, the service termination unit handles only service information related to the same layer, so that each service does not interfere with each other. Therefore, it can easily cope with many protocols.

  The invention according to claim 5 further includes an optical packet switch for routing an optical packet, wherein the service termination unit adds a tag to the service information based on destination information included in the service information, thereby The optical multilayer network system according to claim 4, wherein an optical packet is generated.

  In this way, according to the present invention, it is possible to realize an optimal process for bursty communication with the traffic volume dynamically changing.

  The invention according to claim 6 is characterized in that the service virtualization slice realizes any one of an IP (Internet Protocol) packet switch, an Ethernet frame switch, and an ATM (Asynchronous Transfer Mode) switch. An optical multilayer network system according to claim 1 is provided.

  Thus, according to the present invention, any of the IP switch function, the Ethernet switch function, and the ATM switch function can be realized in the entire optical network.

  The optical multi-layer network system according to claim 6, further comprising an optical wavelength switch.

  In this way, according to the present invention, it is possible to realize optimum processing for a service having a large traffic band and a long holding time.

  According to an eighth aspect of the present invention, the optical multi-layer network system according to the first aspect is further realized by an optical control slice for controlling each of the service virtualization slices.

  Thus, according to the present invention, a service virtualization slice can be realized more easily by controlling the optical edge and each physical node constituting the optical multilayer network system.

  According to the present invention, an optical multilayer network system can be adapted to many protocols.

1 is a schematic configuration diagram showing an optical multilayer network system in a first embodiment. FIG. It is a schematic block diagram which shows the optical edge in 2nd Embodiment. It is a flowchart which shows the reception process of the IP corresponding | compatible part in 2nd Embodiment. It is a flowchart which shows the reception process of the Ethernet corresponding | compatible part in 2nd Embodiment. It is a flowchart which shows the reception process of the ATM corresponding | compatible part in 2nd Embodiment. It is a figure which shows the optical multilayer network system in 3rd Embodiment. It is a figure which shows the optical multilayer network system in 4th Embodiment. It is a figure which shows the optical multilayer network system in 5th Embodiment. It is a figure which shows the virtual network of a comparative example.

Next, modes for carrying out the present invention (referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.
(First embodiment)
FIGS. 1A and 1B are schematic configuration diagrams showing an optical multilayer network system 1 in the first embodiment.
As shown in FIG. 1A, an optical multilayer network system 1 is realized on a physical network 3 to form a single autonomous system, and optical edges 11-1 to 11- that are input / output portions. 4 and a physical node 12 for realizing a virtual router. The optical edges 11-1 to 11-4 are connected to each other by an optical path 13 so that they can communicate with each other.
The optical edges 11-1 to 11-4 are connected to different protocols such as IP, Ethernet (registered trademark), and ATM, and terminates services based on these protocols. Hereinafter, “Ethernet (registered trademark)” is simply referred to as “Ethernet”. The other network 2-1 is connected to the optical edge 11-1. The other network 2-3 is connected to the optical edge 11-3. Other networks 2-1 and 2-3 each constitute an autonomous system. However, the present invention is not limited to this, and the optical multilayer network system 1 may constitute a part of an autonomous system. For example, the autonomous system may be configured by the optical multilayer network system 1 and other networks 2-1, 2-3. Thereby, the function of an autonomous system can be suitably allocated and configured to the optical multilayer network system 1 and the other networks 2-1, 2-3.

As shown in FIG. 1 (b), the optical multilayer network system 1 is one autonomous system and responds to a service that emulates an IP packet (eg, an IP packet switch) for an IP packet. IP emulation slice 14a. The IP emulation slice 14a is connected to the slice 21a of the autonomous system of the other network 2-1, and the slice 21a of the autonomous system of the other network 2-3.
Furthermore, the optical multilayer network system 1 becomes an Ethernet emulation slice 14b corresponding to a service for emulating an Ethernet-compatible device (for example, an Ethernet switch) for an Ethernet frame. The Ethernet emulation slice 14b is connected to the slice 21b of the autonomous system of the other network 2-1 and the slice 21b of the autonomous system of the other network 2-3.

Further, the optical multilayer network system 1 becomes an ATM emulation slice 14c corresponding to a service for emulating an ATM-compatible device (for example, an ATM switch) for an ATM cell. The ATM emulation slice 14c is connected to, for example, the slice 21c of the other network 2-1 and the slice 21c of the other network 2-3.
The IP emulation slice 14a, the Ethernet emulation slice 14b, and the ATM emulation slice 14c are service virtualization slices obtained by virtualizing each service. Similarly, the other networks 2-1 and 2-3 have slices 21a to 21c which are service virtualization slices obtained by virtualizing the respective services.

Between each optical edge 11, the optical path 13 is connected to the full mesh. In the IP protocol, the IP emulation slice 14a functions as one large switch (router). The function of a single switch is realized by an input line corresponding unit, an output line corresponding unit, and a packet switch unit.
In the IP emulation slice 14a, the optical edge 11 corresponds to the input line corresponding unit and the output line corresponding unit. What corresponds to the packet switch unit is a virtual router realized by the physical node 12.

When the IP emulation slice 14a receives an IP packet by the optical edge 11-1 corresponding to the input line corresponding unit, the IP emulation slice 14a uses a tag based on the source address, destination address, and port number in the header of the received IP packet. Internal routing information called is attached. Thereby, the IP packet is encapsulated.
The virtual router corresponding to the packet switch unit transfers to another optical edge 11 corresponding to the output line corresponding unit, for example, the optical edge 11-3, based on internal routing information called a tag. The next node (other network 2-3) to be the next hop is connected to the optical edge 11-3. The other optical edge 11 corresponding to the output line corresponding unit removes the tag and decapsulates it, and transfers the IP packet to the other network 2-3 as the next node.
The IP emulation slice 14a subtracts one TTL (Time To Live) in the header before transferring the IP packet to the other network 2-3, which is another router. Thereby, a loop of the IP packet can be avoided.

In the first embodiment, the input side optical edge 11-1 is an input line corresponding unit, and the output side optical edge 11-3 is an output line corresponding unit. Are connected by an optical path 13. Thereby, when viewed from the IP protocol, the optical multilayer network system 1 functions as one router.
The same applies to other protocols such as Ethernet and ATM, and the optical multilayer network system 1 functions as one switch or one hub between the optical edges 11.

(Second Embodiment)
FIG. 2 is a schematic configuration diagram showing the optical edge 11 in the second embodiment.
The optical edges 11-1 and 11-3 are service termination units of the IP protocol, which are two IP correspondence units 111a indicated by “IP” in FIG. 2 and a service termination unit of the Ethernet frame. 2 is an Ethernet corresponding part 111b indicated by “Ether” in FIG. 2 and a service terminating part of an ATM cell, and two ATM corresponding parts 111c indicated by “ATM” in FIG. And a switch unit 112 that switches between and optical MAC (Media Access Control) units 113a, 113b, and 113c. Note that the IP correspondence unit 111a, the Ethernet correspondence unit 111b, and the ATM correspondence unit 111c are not limited to the numbers shown in FIG. 2, but may be any number.

The IP corresponding unit 111a, the switch unit 112, the optical MAC unit 113a, and the optical wavelength λ1 of the optical path 13 constitute an IP emulation slice 14a (see FIG. 1B).
The IP correspondence unit 111a, which is a service termination unit of the IP protocol, is a target output port of the optical multilayer network system 1 (see FIG. 1A) based on the destination address and port number of the header of the received IP packet. (See FIG. 3A to be described later).

The Ethernet corresponding unit 111b, the switch unit 112, the optical MAC unit 113b, and the optical wavelength λ2 of the optical path 13 constitute an Ethernet emulation slice 14b (see FIG. 1B).
Based on the destination address in the header of the received Ethernet frame, the Ethernet corresponding unit 111b, which is the service termination unit of the Ethernet frame, transfers it to the target output port of the optical multilayer network system 1 (see FIG. 1A). Preparation (see FIG. 4A described later) is performed.

The ATM corresponding unit 111c, the switch unit 112, the optical MAC unit 113c, and the optical wavelength λ3 of the optical path 13 constitute an ATM emulation slice 14c (see FIG. 1B).
The ATM corresponding unit 111c, which is a service terminal unit of the ATM cell, is used for the purpose of the optical multilayer network system 1 (see FIG. 1A) based on the virtual path identifier and the virtual channel identifier in the received ATM cell header. Preparation for transferring to an output port (see FIG. 5A described later) is performed.

By doing so, the processing units of the respective protocols are hierarchized within the optical edge 11, so that the services of the respective protocols can easily cope with many protocols without interfering with each other.
The optical multilayer network system 1 has full mesh connectivity. The optical multilayer network system 1 selects the optical wavelengths λ1 to λ3 toward the corresponding output. The switch unit 112 has a function to be connected when the optical wavelengths λ1 to λ3 are selected, and distributes service information (IP packet, Ethernet frame, ATM cell) according to each service type.

  The optical MAC units 113a, 113b, and 113c function between the optical edge 11 that is an input line corresponding unit and the optical edge 11 that is an output line corresponding unit, and service information (IP packet, Ethernet frame, ATM). Cell) is transferred to the other optical edge 11 via the optical path 13.

FIGS. 3A and 3B are flowcharts showing the reception processing of the IP corresponding unit 111a in the second embodiment.
FIG. 3A shows an IP packet reception process of the optical edge 11 which is an input line corresponding unit.
If the IP corresponding unit 111a of the optical edge 11 receives an IP packet from the outside, the reception process is started.
In step S10, the IP corresponding unit 111a generates internal routing information based on the destination address of the received IP packet.
In step S11, the IP corresponding unit 111a sets the IP packet as a payload.

In step S12, the IP corresponding unit 111a writes the internal routing information in the tag.
In step S13, the IP corresponding unit 111a controls the switch unit 112 to transmit the generated optical packet to the optical MAC unit 113a of the IP emulation slice 14a, and ends the reception process of FIG. .
The IP emulation slice 14a configures an optical packet by using the IP packet as a payload of the optical packet and using internal routing information indicating the destination as a tag. Therefore, the IP emulation slice 14a can determine the internal routing of the optical packet based on the tag.

FIG. 3B shows an optical packet reception process of the optical edge 11 which is the output line corresponding unit.
When the IP corresponding unit 111a of the optical edge 11 receives the optical packet from the switch unit 112, the following processing is started.
In step S20, the IP corresponding unit 111a sets the payload of the received optical packet as an IP packet. Thereby, the optical packet is decapsulated and an IP packet can be acquired.
In step S21, the IP corresponding unit 111a transfers the IP packet to the outside, and ends the reception process shown in FIG.

FIGS. 4A and 4B are flowcharts showing the reception process of the Ethernet corresponding unit 111b in the second embodiment.
FIG. 4A shows the reception process of the Ethernet frame of the optical edge 11 which is the input line corresponding unit.
When the Ethernet corresponding unit 111b of the optical edge 11 receives an Ethernet frame from the outside, the following processing is started.
In step S30, the Ethernet corresponding unit 111b generates internal routing information based on the destination address of the received Ethernet frame.
In step S31, the Ethernet corresponding unit 111b sets the Ethernet frame as a payload.

In step S32, the Ethernet corresponding unit 111b writes the internal routing information in the tag.
In step S33, the Ethernet corresponding unit 111b controls the switch unit 112 to transmit the generated optical packet to the optical MAC unit 113b of the Ethernet emulation slice 14b, and ends the reception process illustrated in FIG. To do.
The Ethernet emulation slice 14b configures an optical packet using an Ethernet frame as a payload of the optical packet and internal routing information indicating a destination as a tag. Therefore, the Ethernet emulation slice 14b can determine the internal routing of the optical packet based on the tag.

FIG. 4B shows an optical packet reception process of the optical edge 11 which is the output line corresponding unit.
When the Ethernet corresponding unit 111b of the optical edge 11 receives the optical packet from the switch unit 112, the following processing is started.
In step S40, the Ethernet corresponding unit 111b sets the payload of the received optical packet as an Ethernet frame.
In step S41, the Ethernet corresponding unit 111b transfers this Ethernet frame to the outside, and ends the reception process shown in FIG. 4B.

FIGS. 5A and 5B are flowcharts showing the reception processing of the ATM corresponding unit 111c in the second embodiment.
FIG. 5A shows an ATM cell reception process of the optical edge 11 which is an input line corresponding unit.
When the ATM corresponding unit 111c of the optical edge 11 receives an ATM cell from the outside, the following processing is started.
In step S50, the ATM corresponding unit 111c generates internal routing information based on the received virtual path identifier and virtual channel identifier of the ATM cell.
In step S51, the ATM corresponding unit 111c sets the ATM cell as the payload.
In step S52, the ATM corresponding unit 111c writes the internal routing information in the tag.

In step S53, the ATM corresponding unit 111c controls the switch unit 112 to transmit the generated optical packet to the optical MAC unit 113c of the ATM emulation slice 14c, and ends the reception process illustrated in FIG. .
The ATM emulation slice 14c constitutes an optical packet using an ATM cell as a payload of the optical packet and using internal routing information indicating a destination as a tag. Therefore, the ATM emulation slice 14c can determine the internal routing of the optical packet based on the tag.

FIG. 5B shows an optical packet reception process of the optical edge 11 which is the output line corresponding unit.
When the ATM corresponding unit 111c of the optical edge 11 receives the optical packet from the switch unit 112, the following processing is started.
In step S60, the ATM corresponding unit 111c sets the payload of the received optical packet as an ATM cell.
In step S61, the ATM corresponding unit 111c transfers the ATM cell to the outside, and ends the reception process shown in FIG.
In this manner, each service termination unit receives an optical packet from a similar service termination unit at another optical edge, and transfers this payload to the outside. Therefore, each service can easily cope with many protocols without interfering with each other.
Furthermore, each service termination unit encapsulates each protocol and assigns common internal routing information as a tag. Thereby, the optical multilayer network system 1 can easily cope with many protocols by sharing the packet switch unit of each protocol.

(Third embodiment)
FIG. 6 is a diagram showing an optical multilayer network system 1B in the third embodiment.
In addition to the optical edges 11-1 to 11-4, the optical multilayer network system 1B includes an optical path 13 including eight different optical wavelengths λ1 to λ8, and an optical wavelength switch 12C. The optical edges 11-1 to 11-4 and the optical wavelength switch 12C are connected by an optical path 13, respectively. The optical wavelength switch 12C is not limited to one, and a plurality of optical wavelength switches may be used.
Each optical edge 11 is connected via optical wavelengths λ1 to λ8 and an optical wavelength switch 12C. Each of the optical wavelengths λ1 to λ8 is assigned to any slice. As a result, it is possible to realize optimum processing for a service having a large traffic band and a long holding time.

(Fourth embodiment)
FIG. 7 is a diagram showing an optical multilayer network system 1C in the fourth embodiment.
The optical multilayer network system 1C includes an optical path 13 having an optical wavelength λ1 and an optical packet switch 12D for routing the optical packet 5 in addition to the optical edges 11-1 to 11-4. The optical edges 11-1 to 11-4 and the optical packet switch 12D are connected by an optical path 13, respectively. The optical packet switch 12D is not limited to one, and a plurality of optical packet switches may be used.
Any one of the IP packet 4a, the Ethernet frame 4b, and the ATM cell 4c is transmitted to and received from the optical edge 11.

When receiving the IP packet 4a from another node, the IP corresponding unit 111a serving as the service termination unit sets the IP packet 4a as the payload 51 and adds a tag 52 based on the destination information included in the IP packet 4a. Then, the optical packet 5 is generated.
When receiving the Ethernet frame 4b from another node, the Ethernet corresponding unit 111b, which is a service termination unit, uses the Ethernet frame 4b as the payload 51 and adds a tag 52 based on the destination information included in the Ethernet frame 4b. Then, the optical packet 5 is generated.
When receiving the ATM cell 4c from another node, the ATM corresponding unit 111c, which is a service terminating unit, uses the ATM cell 4c as the payload 51 and adds a tag 52 based on the destination information included in the ATM cell 4c. Then, the optical packet 5 is generated.

  The optical packet 5 is transmitted / received to / from each optical path 13. The payload 51 of the optical packet 5 stores one of the IP packet 4a, the Ethernet frame 4b, and the ATM cell 4c. The tag 52 stores the internal routing information of the optical packet 5. The bandwidth of each optical path 13 is designed in consideration of each bandwidth of the IP packet 4a, the Ethernet frame 4b, and the ATM cell 4c. Even in burst communication where the traffic volume of any of the IP packet 4a, the Ethernet frame 4b, and the ATM cell 4c suddenly increases, it is rare that the traffic volume related to the other protocol increases at the same time. Therefore, communication can be performed within the band of the optical path 13. As a result, the traffic volume changes dynamically, and optimal processing can be realized for bursty communication.

(Fifth embodiment)
FIGS. 8A and 8B are diagrams showing an optical multilayer network system 1D in the fifth embodiment. FIG. 8A shows a schematic structure of the optical multilayer network system 1D. FIG. 8B shows a detailed structure at the optical edges 11D-1 and 11D-3 of the optical multilayer network system 1D.
As shown in FIG. 8A, the optical multilayer network system 1D uses these transport slices separately from the transport slices that transfer services such as the IP emulation slice 14a, the Ethernet emulation slice 14b, and the ATM emulation slice 14c. An optical control slice 14d for control is provided.

The optical control slice 14d connects the optical edges 11 and passes band adjustment information, address information, information related to OSPF (Open Shortest Path First), or spanning tree control information in the case of Ethernet.
FIG. 8B shows a detailed structure at the optical edges 11D-1 and 11D-3. The same reference numerals are given to the same elements as those of the optical edge 11 of the second embodiment shown in FIG.
The optical edges 11D-1 and 11D-3 have the same configuration as that of the optical edge 11 of the second embodiment, the optical MAC unit 113d, and the light indicated by “control” in FIG. 8B. A control unit 111d and an optical wavelength λ4 of the optical path 13 are provided.
The optical MAC unit 113d, the switch unit 112, the optical control unit 111d, and the optical wavelength λ4 of the optical path 13 constitute an optical control slice 14d.

  The optical control unit 111d controls the IP corresponding unit 111a, the Ethernet corresponding unit 111b, the ATM corresponding unit 111c, and the optical MAC units 113a to 113c based on information received from the other optical edge 11D. The optical control unit 111d further includes bandwidth adjustment information, address information, OSPF information acquired from the IP correspondence unit 111a, the Ethernet correspondence unit 111b, the ATM correspondence unit 111c, the optical MAC units 113a to 113c, or the information on the Ethernet. Spanning tree control information and the like are transmitted to the other optical edge 11D via the switch unit 112 and the optical MAC unit 113d. Thereby, each part of the optical edge 11D constituting each slice can be controlled to function as one switch. In addition, it is not restricted to controlling each part of optical edge 11D, You may control the physical node 12 of this optical multilayer network system 1D. Thereby, each service virtualization slice can be realized more easily.

(Modification)
The present invention is not limited to the above-described embodiment, and can be modified without departing from the spirit of the present invention. For example, there are the following (a) and (b).

(A) The protocol to which each slice constituting the optical multilayer network system 1, 1B, 1C, 1D corresponds is not limited to the IP protocol, the Ethernet protocol, and the ATM protocol, and any protocol may be supported.

(B) The function realized by each slice constituting the optical multilayer network system 1, 1B, 1C, 1D is not limited to the router function, and may be an arbitrary function such as a database function or an arithmetic function.

1, 1B, 1C, 1D Optical Multilayer Network System 11, 11D Optical Edge 111a IP Corresponding Unit 111b Ethernet Corresponding Unit (Service Termination Unit)
111c ATM support section (service termination section)
111d Optical control unit (service termination unit)
112 switch units 113a to 113c optical MAC unit 12 physical node 12C optical wavelength switch 13 optical path 14a IP emulation slice (service virtualization slice)
14b Ethernet emulation slice (service virtualization slice)
14c ATM emulation slice (service virtualization slice)
15 Virtual router 2 Other network 21a-21c slice (service virtualization slice)
3 Physical Network 31 Physical Node 4a IP Packet 4b Ethernet Frame 4c ATM Cell 5 Optical Packet 51 Payload 52 Tag

Claims (8)

A plurality of optical edges that are communicatively connected to each other via an optical path and terminate one or more services;
Realizing each service virtualization slice corresponding to each said service;
An optical multilayer network system characterized by the above. The optical multilayer network system is
Either itself forms a single autonomous system, or it forms part of an autonomous system,
The optical multilayer network system according to claim 1. The light edge is
A service termination for terminating each of the services;
A switch unit that distributes service information according to the type of service;
An optical MAC (Media Access Control) unit for transferring the service information to another optical edge;
The optical multilayer network system according to claim 1, comprising: If the service termination unit receives the service information from another optical edge, the service termination unit transfers the service information to the outside.
The optical multilayer network system according to claim 3. An optical packet switch for routing optical packets;
The service termination unit generates the optical packet by adding a tag to the service information based on destination information included in the service information.
The optical multilayer network system according to claim 4, wherein The service virtualization slice is
An IP (Internet Protocol) packet switch, an Ethernet frame switch, or an ATM (Asynchronous Transfer Mode) switch is realized.
The optical multilayer network system according to claim 1. An optical wavelength switch;
The optical multilayer network system according to claim 6. An optical control slice that controls each said service virtualization slice;
The optical multilayer network system according to claim 1, further comprising:

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