KR102628279B1 - System and method for supporting mobility based on sdn - Google Patents

Abstract

According to the present invention, an SDN-based network mobility support system includes a plurality of network systems which individually include an SDN controller, a network switch, and an IP device. The plurality of network systems are directly or indirectly connected to a different network system, a control channel is formed with the SDN controller of the different network system, and a transmission channel is formed with the network switch and the IP device.

Description

SDN-based network mobility support system and method {SYSTEM AND METHOD FOR SUPPORTING MOBILITY BASED ON SDN}

The present invention relates to an SDN-based network mobility support system and method. In particular, by applying Software Defined Networking (SDN) technology, when a lower network moves in a hierarchical network and connects to a higher network that is different from the existing network contact point, the present invention relates to an SDN-based network mobility support system and method. , It relates to an SDN-based network mobility support system and method that ensures connectivity when moving the network by automatically assigning an IP address through an SDN controller.

Special-purpose networks, such as military or disaster communication networks, are structured hierarchically and have the characteristic of being moved and operated at any time according to the purpose rather than being fixedly installed and operated at all times. Therefore, some networks must move and newly connect to other higher-level networks to support network opening and operation functions.

1 is a diagram showing a special-purpose network structure in the prior art. Referring to Figure 1, the network is hierarchically structured and is a network used for special purposes such as military and disaster communication networks, and has a structure in which the entire lower network can be moved and connected to another upper network.

FIGS. 2A and 2B are diagrams for explaining a network movement process in the prior art. In Figure 2a, the 'E network' is connected to the 'B network' through the IP protocol, and in Figure 2b, the 'E network' disconnects from the 'B network', moves to the lower layer of the 'C network', and connects to the IP protocol. Indicates the status of connection via protocol. In the case of this prior art, the 'E network' is still entered with an IP address that can communicate with the 'B network', so the 'C network' and 'E network' are not IP-linked, so the operator must manually set the IP address. There was a problem.

The problem that the present invention aims to solve is by applying Software Defined Networking (SDN) technology, when a lower network moves in a hierarchical network and connects to a higher network that is different from the existing network contact point, the IP address is automatically changed through the SDN controller. It relates to an SDN-based network mobility support system and method that can ensure connectivity during network movement by allocating .

However, the problem to be solved by the present invention is not limited to the problems described above, and other problems may exist.

The SDN-based network mobility support system according to the first aspect of the present invention for solving the above-mentioned problems includes a plurality of network systems each including an SDN controller, a network switch, and an IP device, wherein the plurality of network systems include, It is directly or indirectly connected to another network system, and a control channel is formed with the SDN controller of the other network system, and a transmission channel is formed with the network switch and IP device.

In some embodiments of the present invention, the plurality of network systems include a master network system in which the SDN controller is a global controller, and the SDN controller is a local network, and is directly or indirectly connected to the master network system. It may include a slave network system.

In some embodiments of the present invention, the plurality of network systems transmit and receive control information between the SDN controllers of each network system through a physically separated control channel, and the network systems of each network system through a physically separated transmission channel. User data can be transmitted and received between switches.

In some embodiments of the present invention, the plurality of network systems may include a channel virtualization device for transmitting and receiving control information and user data through one physical channel.

In some embodiments of the present invention, the channel virtualization device of the transmitting network system among the plurality of network systems receives control information from the SDN controller and configures the physical channel as integrated data as it receives user data from the network switch. It can be transmitted through .

In some embodiments of the present invention, the channel virtualization device of the receiving network system among the plurality of network systems separates the integrated data into control information and user data, then transmits the control information to the SDN controller and to the network switch. User data can be transmitted.

In some embodiments of the present invention, when the network system disconnects the existing connection and moves to a lower layer of another network system, the SND controller receives an IP address from the SDN controller of the other network system through a control channel, The IP address can be applied to network switches and IP devices to enable IP interworking with other network systems.

In some embodiments of the present invention, the SDN controller may be assigned the IP address as mutual authentication based on ID and unique key value is completed with the SDN controller of the other network system.

In addition, the SDN-based network mobility support method according to the second aspect of the present invention includes the steps of a first network system disconnecting an existing connection and moving to a lower layer of a second network system; A first SDN controller of the first network system receiving an IP address from a second SDN controller of the second network system through a control channel; The first SDN controller applying the IP address to a network switch and IP device; and transmitting and receiving user data to and from a second network system through a transmission channel as application of the IP address is completed in the first network system.

Some embodiments of the present invention may further include the step of the first network system performing mutual authentication based on ID and unique key value with the second network system through a control channel.

In some embodiments of the present invention, the step of the first network system performing mutual authentication with the second network system through a control channel includes the first SDN controller being connected to the second SDN controller of the second network system. requesting authentication; Receiving an authentication completion response from the second SDN controller as authentication for the first network system is completed; And it may include the step of the first SDN controller performing authentication for the second network system.

In some embodiments of the present invention, the step of receiving, by the first SDN controller of the first network system, an IP address from the second SDN controller of the second network system through a control channel, the first SDN controller Requesting an IP address from a second SDN controller; And as the IP address for the first network system is allocated in the second SDN controller, the first SDN controller may include receiving the IP address.

In some embodiments of the present invention, the step of the SDN controller of the first network system applying the IP address to the network switch and IP device includes the first SDN controller transmitting the IP address to the network switch and IP device. step; Applying an IP address in the network switch and IP device; The first SDN controller receiving a response as application of the IP address is completed; And it may include the step of transmitting an IP address application result from the first SDN controller to the second SDN controller.

In some embodiments of the present invention, the step of receiving, by the first SDN controller of the first network system, an IP address from the second SDN controller of the second network system through a control channel, the second SDN controller Allocating an IP address for a network system; And it may include the step of the second SDN controller requesting setting of the IP address and transmitting the IP address to the first SDN controller.

A computer program according to another aspect of the present invention for solving the above-described problem is combined with a computer as hardware to execute the SDN-based network mobility support method, and is stored in a computer-readable recording medium.

Other specific details of the invention are included in the detailed description and drawings.

In the past, there was the inconvenience of requiring users to manually enter IP addresses and other equipment operation parameters when moving networks in a special-purpose hierarchical network. However, according to an embodiment of the present invention, IP addresses are automatically assigned when moving networks. This allows the network to be opened unattended, allowing IP communication to immediately begin on a new network without user intervention.

In addition, problems caused by delays and input errors that may occur when users enter IP addresses and other settings can be eliminated. The automatic IP allocation and setting function alleviates these problems and speeds up network opening. It can be done.

In addition, the present invention automatically performs mutual authentication when moving the network and automatically assigns an IP address after completing the security integrity verification, which has the advantage of strengthening security and enabling quick IP communication even after moving the network. .

In addition, previously, there were difficulties in checking and setting IP addresses when the network was not pre-planned, but according to an embodiment of the present invention, when connecting to a random network, automatic mutual authentication and IP allocation functions operate, so even after moving the network, quick IP address It has the advantage of being able to establish communication.

In addition, the application of the present invention enables automatic IP allocation and setting without user intervention when moving to a network, and provides the ability for a higher-level network operator to remotely manipulate IP allocation and equipment settings, thereby supporting unmanned operation. You can.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

The drawings attached below are intended to aid understanding of the present embodiment and provide examples along with a detailed description. However, the technical features of this embodiment are not limited to specific drawings, and the features disclosed in each drawing may be combined to form a new embodiment.
1 is a diagram showing a special-purpose network structure in the prior art.
FIGS. 2A and 2B are diagrams for explaining a network movement process in the prior art.
Figure 3 is a flow chart to explain the network movement process in the prior art.
Figure 4 is a structural diagram of a network mobility support system according to an embodiment of the present invention.
Figure 5a is a diagram for explaining an embodiment in which a control channel and a transmission channel are respectively provided in one embodiment of the present invention.
Figure 5b is a diagram for explaining an embodiment in which a control channel and a transmission channel are integrated in one embodiment of the present invention.
FIG. 5C is a diagram for explaining an embodiment in which a control channel and a transmission channel are formed by mixing the embodiments of FIGS. 5A and 5B in one embodiment of the present invention.
Figures 6a and 6b are diagrams for explaining the movement process of a network system in one embodiment of the present invention.
Figure 7 is a flowchart of a method for supporting network mobility according to an embodiment of the present invention.
Figure 8 is a diagram for explaining a process of performing mutual authentication between network systems in an embodiment of the present invention.
Figure 9 is a diagram for explaining the IP communication opening procedure in one embodiment of the present invention.
Figure 10 is a diagram for explaining an IP communication opening procedure in another embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to provide a general understanding of the technical field to which the present invention pertains. It is provided to fully inform the skilled person of the scope of the present invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for describing embodiments and is not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other elements in addition to the mentioned elements. Like reference numerals refer to like elements throughout the specification, and “and/or” includes each and every combination of one or more of the referenced elements. Although “first”, “second”, etc. are used to describe various components, these components are of course not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be a second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

Hereinafter, the content of the present invention will first be described to aid the understanding of those skilled in the art.

Figure 3 is a flow chart to explain the network movement process in the prior art.

In order for one network system to move to another network system in a plurality of network systems for special purposes, the connection with the existing network system of the upper layer is first disconnected (S10).

Next, move to the lower layer of the other network system to which you want to move and connect to the other network system (S20). This refers to a physical connection such as a cable connection, and since the IP address for other network systems is not set on the network system in question, IP communication is not possible.

Next, the IP addresses of the network switch and IP device are manually changed to match the IP address of another network system in the new upper layer (S30). In FIG. 2b described above, the IP addresses of the network switches and various IP devices, which are components of the 'E network' system, are changed to addresses that can access the 'C network' system, so that the IP addresses between the 'E network' system and the 'C network' system are changed. Complete the IP communication connection. At this time, you must enter not only the IP address but also other settings required for equipment operation.

The problems with this prior art are as follows.

First, you have to manually enter your IP address and other device settings every time you move from your current network to another network. In other words, when considering network movement, when moving from a currently accessible network to another network, the user must manually enter the IP address and other equipment settings in order to connect to the new network and establish IP communication. This means that automatic network connection is not possible without an operator opening the network when moving, and therefore unmanned operation is not possible in the case of conventional technology.

Second, even if the operator enters the IP address and other equipment settings, there is a delay in opening the network, which acts as a limitation on the rapid movement of special purposes. In other words, when the operator inputs the IP address and other equipment settings, network opening delay occurs compared to the system automatically processing it, and there are restrictions on the operation of special-purpose equipment that must be moved and opened within a quick time. do.

Third, before disconnecting from the existing network and moving to another network, it is necessary to plan in advance an IP address for connecting to another network, and to allocate the pre-planned IP address and device settings after connecting to another network.

Fourth, when moving to an unplanned network, connection may not be possible due to the lack of an IP address and settings. In other words, when moving to another network, the operator does not have the planned IP address, so if the operator moves to another network, the IP network cannot be connected and an additional process to confirm the IP address must be performed. At this time, the purpose of the special purpose network is to enable use in cases where the existing communication network cannot be used, but there may be situations where it is difficult to quickly check and enter IP information by moving to an unplanned network.

Fifth, when moving to another network and connecting to another network, there is the inconvenience of having to input various equipment settings for operation in addition to the IP address, having to input them manually before activating the IP.

Sixthly, when trying to distinguish between a transmission channel and a control channel to solve the above-mentioned problems, if an attempt is made to physically add a separate control channel, there is a problem that new lines and equipment for the entire network must be installed.

To solve this problem, an embodiment of the present invention applies software defined networking (SDN: Software Defined Networking) technology, so that when a lower network moves in a hierarchical network and connects to a higher network that is different from the existing network contact point, the SDN controller Through this, the user can automatically assign an IP address without having to manually enter the IP address, ensuring connectivity when moving to the network.

Hereinafter, a network mobility support system based on software defined networking (SDN) according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6B.

Figure 4 is a structural diagram of a network mobility support system 1 according to an embodiment of the present invention.

The network mobility support system (1) in one embodiment of the present invention targets a special-purpose network such as a military or disaster communication network, is structured hierarchically, and is not installed fixedly and operated at all times, but is operated at any time according to the purpose. It has the characteristic of moving and operating. Therefore, it is necessary to support the function of opening and operating a network by moving some networks and newly connecting to another upper network.

In one embodiment of the present invention, the mobility support system 1 has a hierarchical network configuration, and several networks have a hierarchical structure. Each network system 100 includes an SDN controller 110, which is a component of SDN. The SDN controller 110 controls the operation of the network system 100 and performs management. Additionally, each network system 100 includes a network switch and an IP device 120 controlled by the SDN controller 110, respectively.

The plurality of network systems 100 are directly or indirectly connected to other network systems, and can transmit and receive control information with the SDN controller of other network systems through a non-IP communication-based control channel, and are connected to network switches and IP devices. Can transmit and receive user data through an IP communication-based transmission channel. In other words, the control channel can communicate without assigning an IP address. Meanwhile, in the embodiment of the present invention, the non-IP communication method is not limited to a specific communication method, and any wired or wireless communication method that can be connected without entering an IP is applicable (for example, serial communication, Bluetooth, Wi-Fi, etc.) Fi, etc.).

The plurality of network systems 100 included in the network mobility support system 1 include a master network system and a plurality of slave network systems. At this time, the master network system consists of the SDN controller 110 as a global controller. The slave network system consists of a local network in which the SDN controller 110 is connected directly or indirectly to the master network system.

Figure 5a is a diagram for explaining an embodiment in which a control channel and a transmission channel are respectively provided in one embodiment of the present invention. Figure 5b is a diagram for explaining an embodiment in which a control channel and a transmission channel are integrated in one embodiment of the present invention. FIG. 5C is a diagram for explaining an embodiment in which a control channel and a transmission channel are formed by mixing the embodiments of FIGS. 5A and 5B in one embodiment of the present invention.

Referring to Figure 5a as an embodiment, in the present invention, a plurality of network systems transmit and receive control information between the SDN controllers of each network system through a physically separated control channel, and through a transmission channel physically separated from the control channel. User data can be transmitted and received between network switches of each network system. In other words, SDN controllers are connected through a control channel to transmit control information end-to-end, and network switches and IP devices are connected through a transmission channel to transmit user data end-to-end. can be transmitted.

In the example of Figure 5a, the control information received from 'A network system' was transmitted to the local controller of 'B network system' through the global controller through a control channel. In the opposite direction, the local controller of 'B network system' can transmit control information to the global controller of 'A network system' through the control channel. At this time, the control channel uses a non-IP communication method that allows immediate communication without entering an IP address.

Referring to FIG. 5B as another embodiment, an embodiment of the present invention shows an embodiment in which the inter-network control channel and transmission channel are not physically separated but are integrated into one channel. To this end, a plurality of network systems may include a channel virtualization device for transmitting and receiving control information and user data through one physical channel.

At this time, in order to transmit and receive both control information and user data through a single channel, that is, a single communication device, control information and user data can be distinguished through resource division technologies such as frequency division (FDD) and time division (TDD). Alternatively, it is possible to transmit and receive control information and user data separately by using a single communication device, but logically dividing the communication network (for example, network slicing technique).

Specifically, the channel virtualization device of the transmitting network system can receive control information from the SDN controller and user data from the network switch, and configure them as integrated data. And it can be transmitted to the channel virtualization device of the receiving network system through a single physical channel.

As the channel virtualization device of the receiving network system receives integrated data, it can separate it into control information and user data, then transmit the control information to the SDN controller and user data to the network switch.

In the example of Figure 5b, the control information transmitted from the global controller of 'A network system' is integrated with the user data of the transmission channel by the channel virtualization device and is transmitted to the channel virtualization device of 'B network system'. The channel virtualization device separates control information from the received integrated data and delivers it to the local controller. Likewise, user data is transmitted and received between switches in the two networks. User data of 'A network system' is integrated with control information by the channel virtualization device and delivered to the channel virtualization device of 'B network system', and the channel virtualization device of 'B network system' extracts user data from the received integrated data. It can be separated and transferred to a network switch.

Through this structure, an embodiment of the present invention has the advantage of being able to communicate efficiently while maintaining the distinction between control information and user data while using a single channel.

In another embodiment, referring to FIG. 5C, a situation is shown in which a communication network with physically separated channels and a communication network with logically separated channels are connected to each other. In this case, control information and user data can be transmitted separately from end-to-end.

Figures 6a and 6b are diagrams for explaining the movement process of a network system in one embodiment of the present invention.

In one embodiment of the present invention, when the network system disconnects the existing connection and moves to a lower layer of another network system, the SDN controller receives an IP address from the SDN controller of the other network system through a control channel, and transfers the IP address to the network system. It can be applied to switches and IP devices to enable IP interworking with other network systems.

Referring to Figure 6a, the 'E network system' is previously connected to the lower layer of the 'B network system', and in order to move to the lower layer of the 'C network system', it disconnects from the 'B network system' and connects to the 'C network system'. Move to the lower layer of the ‘system’.

Next, referring to Figure 6b, the local controller of the 'E network system', which has completed movement and connection to the lower layer of the 'C network system', is assigned an IP address through communication with the local controller of the 'C network system', IP linkage with the 'C Network System' can be completed by assigning IP addresses to each network switch and IP device within the network system.

Through this process, an embodiment of the present invention has the advantage of increasing the efficiency of network movement and supporting unmanned operation.

Hereinafter, a method performed by the SDN-based network mobility support system 1 according to an embodiment of the present invention will be described with reference to FIGS. 7 to 10. At this time, content that overlaps with the content described below in FIG. 4 will be omitted for convenience of explanation.

Figure 7 is a flowchart of a method for supporting network mobility according to an embodiment of the present invention. At this time, for convenience of explanation, the newly moved network system is referred to as the first network system, and the network system to which the first network system is newly connected is referred to as the second network system.

First, the first network system disconnects the existing connection and moves to the lower layer of the second network system (S110). At this time, the control channel is set to non-IP communication for communication between SDN controllers, so communication between SDN controllers is possible regardless of IP settings. However, since the transmission channel is set to IP communication, communication is not possible until the IP setting change is completed. do.

Next, the first network system performs mutual authentication based on ID and unique key value with the second network system through a control channel (S120). Mutual authentication is performed through the SDN controller of each network system.

Next, when mutual authentication is completed, the first SDN controller of the first network system receives an IP address from the second SDN controller of the second network system through a control channel (S130). Meanwhile, the description of the present invention focuses on being assigned an IP address, but of course, it is also possible to be assigned network equipment operation settings in the same way as the IP address.

Next, the first SDN controller applies the IP address to the network switch and IP device (S140), and thus the first network system can transmit and receive user data with the second network system through a transmission channel (S150).

Figure 8 is a diagram for explaining a process of performing mutual authentication between network systems in an embodiment of the present invention.

As the movement of the first network system to the second network system is completed, communication through the control channel between each SDN controller is possible, but IP communication becomes impossible.

At this time, the second SDN controller transmits status information to the first SDN controller (S210), and the first SDN controller confirms that the network movement is completed without a problem through the status information of the second SDN controller (S220). In other words, you can check whether the network movement was successful through the status information, and if there is a problem, you can take additional action.

Thereafter, the first SDN controller transmits the ID and unique key to the second SDN controller to request authentication (S230), and as authentication for the first network system is completed in the second SDN controller (S240), the first SDN controller Receives an authentication completion response from the second SDN controller (S250). Likewise, the first SDN controller authenticates the second network system through a process of checking the integrity and reliability of the response using the unique key it stores (S260). Through this process, the first and second network systems can perform mutual authentication.

Figure 9 is a diagram for explaining the IP communication opening procedure in one embodiment of the present invention.

As mutual authentication is completed, the first SDN controller requests an IP address from the second SDN controller through the control channel (S310). In response to the request, the second SDN controller automatically allocates an IP address for the first network system (S320) and transmits the IP address information to the first SDN controller (S330).

Afterwards, the first SDN controller transmits the IP address to the network switch and IP device (S340), so that the IP address is applied to the network switch and IP device (S350). As this IP address application is completed, the first SDN controller receives a response from the network switch and IP device (S360).

Upon receiving the response, the first SDN controller transmits the IP address application result to the second SDN controller (S370).

Meanwhile, the IP address request and response can be operated in both the form of a manual request and response by an operator and an automatic request and response by the system.

Figure 10 is a diagram for explaining an IP communication opening procedure in another embodiment of the present invention.

In another embodiment, as mutual authentication is completed, the second SDN controller first allocates an IP address to the first network system (S410). And the second SDN controller may first request the first SDN controller to set the corresponding IP address along with the IP address (S420).

Afterwards, the first SDN controller transmits the IP address to the network switch and IP device (S430), so that the IP address is applied to the network switch and IP device (S440). As this IP address application is completed, the first SDN controller receives a response from the network switch and IP device (S450).

Upon receiving the response, the first SDN controller transmits the IP address application result to the second SDN controller (S460).

Meanwhile, in the above description, steps S110 to S460 may be further divided into additional steps or combined into fewer steps, depending on the implementation of the present invention. Additionally, some steps may be omitted or the order between steps may be changed as needed. In addition, even if other omitted content, the content described in FIGS. 4 to 6B and the content described in FIGS. 7 to 10 can be mutually applied.

The SDN-based network mobility support method according to an embodiment of the present invention described above may be implemented as a program (or application) and stored in a medium to be executed in combination with a hardware computer.

The above-mentioned program is C, C++, JAVA, Ruby, and It may include code encoded in a computer language such as machine language. These codes may include functional codes related to functions that define the necessary functions for executing the methods, and include control codes related to execution procedures necessary for the computer's processor to execute the functions according to predetermined procedures. can do. In addition, these codes may further include memory reference-related codes that indicate at which location (address address) in the computer's internal or external memory additional information or media required for the computer's processor to execute the above functions should be referenced. there is. In addition, if the computer's processor needs to communicate with any other remote computer or server in order to execute the above functions, the code uses the computer's communication module to determine how to communicate with any other remote computer or server. It may further include communication-related codes regarding whether communication should be performed and what information or media should be transmitted and received during communication.

The storage medium refers to a medium that stores data semi-permanently and can be read by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specifically, examples of the storage medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., but are not limited thereto. That is, the program may be stored in various recording media on various servers that the computer can access or on various recording media on the user's computer. Additionally, the medium may be distributed to computer systems connected to a network, and computer-readable code may be stored in a distributed manner.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

1: Network mobility support system
100: Network system
110: SDN controller
120: Network switches and IP devices

Claims (14)

In an SDN-based network mobility support system,
Comprising a plurality of network systems each including an SDN controller, a network switch, and an IP device,
The plurality of network systems are directly or indirectly connected to other network systems, a control channel is formed with the SDN controller of the other network system, and a transmission channel is formed with a network switch and IP device,
The plurality of network systems,
A master network system in which the SDN controller is configured as a global controller,
The SDN controller is configured as a local network and includes a slave network system directly or indirectly connected to the master network system,
The plurality of network systems transmit and receive control information between SDN controllers of each network system through physically separated control channels, and transmit and receive user data between network switches of each network system through physically separated transmission channels,
The plurality of network systems include a channel virtualization device for transmitting and receiving control information and user data through one physical channel,
Among the plurality of network systems, the channel virtualization device of the transmitting network system receives control information from the SDN controller and receives user data from the network switch, configures it into integrated data and transmits it through the physical channel,
Among the plurality of network systems, the channel virtualization device of the receiving network system separates the integrated data into control information and user data, transmits the control information to the SDN controller, and transmits the user data to the network switch,
When the network system disconnects the existing connection and moves to a lower layer of another network system, the SND controller receives an IP address from the SDN controller of the other network system through a control channel, and transfers the IP address to network switches and IP devices. Apply it to IP interoperability with other network systems,
The SDN controller is an SDN-based network mobility support system in which the IP address is assigned as mutual authentication based on ID and unique key value is completed with the SDN controller of the other network system.
delete delete delete delete delete delete delete In a method performed by an SDN-based network mobility support system,
The first network system disconnects the existing connection and moves to a lower layer of the second network system;
A first SDN controller of the first network system receiving an IP address from a second SDN controller of the second network system through a control channel;
The first SDN controller applying the IP address to a network switch and IP device; and
When application of the IP address is completed in the first network system, transmitting and receiving user data with a second network system through a transmission channel,
It further includes the step of performing mutual authentication based on ID and unique key value by the first network system with the second network system through a control channel,
The step of the first network system performing mutual authentication with the second network system through a control channel,
Requesting authentication from the first SDN controller to a second SDN controller of the second network system;
Receiving an authentication completion response from the second SDN controller as authentication for the first network system is completed; and
Comprising the step of the first SDN controller performing authentication for the second network system,
The step of the first SDN controller of the first network system being assigned an IP address from the second SDN controller of the second network system through a control channel,
Requesting an IP address from the first SDN controller to the second SDN controller; and
As the IP address for the first network system is assigned in the second SDN controller, receiving the IP address by the first SDN controller,
The step of the SDN controller of the first network system applying the IP address to the network switch and IP device,
The first SDN controller transmitting an IP address to a network switch and an IP device;
Applying an IP address in the network switch and IP device;
The first SDN controller receiving a response as application of the IP address is completed; and
Comprising the step of transmitting an IP address application result from the first SDN controller to the second SDN controller,
The step of the first SDN controller of the first network system being assigned an IP address from the second SDN controller of the second network system through a control channel,
a second SDN controller allocating an IP address for the first network system; and
An SDN-based network mobility support method comprising the second SDN controller requesting setting of the IP address and transmitting the IP address to the first SDN controller.
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