KR102054259B1 - Intent based efficient resource management in SDN, and computer readable medium storing a program of the same - Google Patents

Abstract

The present invention provides an environment using an SDN controller called ONOS in a software defined network (SDN) network for a method and system for performing intent-based efficient resource management in a software defined network (SDN). Based on the intent framework provided by Onos, it allows you to program networking at an abstract level, rather than having to program specific details on a device-by-device basis, thereby allowing traffic flow from source to destination. By providing a path for traffic flow, the flow can be transmitted uniformly.

Description

Intent based efficient resource management in SDN, and computer readable medium storing a program of a method and system for performing intent-based resource management in a software-defined network. the same}

The present invention relates to a method and system for performing intent-based efficient resource management in a software defined network (SDN).

Software Defined Networking (SDN) is a new network structure or new paradigm that separates the network into a control plane and a transport plane. One technique that implements this is OpenFlow. The Open Networking Foundation (ONF), which develops OpenFlow-related standards, was the most influential until recently, but recently, research on network function virtualization (NFV) has been active in the European Telecommunications Standards Institute (ETSI) and the Internet Engineering Task Force (IETF). . Recently, network function virtualization technology is bringing about new changes in the hardware architecture. Network Function Virtualization (NFV), or NFV, separates hardware and software components of a network, and virtualizes the functions of a physical network facility by using virtual machine (VM) servers, hardware with general purpose processors, and cloud. The concept of running on a ding machine This allows various network devices such as routers, load balancers, firewalls, intrusion prevention and virtual private networks to be implemented in software on a common server, freeing the vendor's dependence on network configuration. This is because expensive dedicated equipment can be replaced with general purpose hardware and dedicated software. Furthermore, it has the advantage of not only reducing equipment operating costs but also responding to traffic changes quickly.

On the other hand, Software Defined Networking (SDN), or SDN technology, separates the function of a complex control plane from the data plane. This allows the software to handle the complex functions of the control plane, while the data plane performs only the simple functions indicated by the control plane, such as forwarding, ignoring, and altering network packets. With this technology, new network functions can be developed in software without the limitations of complex hardware, while at the same time making various attempts that were not possible with previous network architectures.

The NFV and SDN are separate technologies but may complement each other. This is because various network functions implemented by software by NFV can be efficiently controlled using SDN.

SDN is based on two basic principles.

First, SDN should do Software Defined Forwarding. Software-defined forwarding means that the data-forwarding functions handled by the hardware at the switch / router must be controlled through open interfaces and software.

Second, SDN aims at Global Management Abstraction. SDN allows for more advanced network management through abstraction.

For example, this abstraction could include the response to events (topological changes or new flow inputs), and the ability to control network elements, based on the state of the entire network.

However, current SDN controllers provide an intent framework. However, SDN controllers do not provide an intent framework and associate it with an administrator domain so that when a specific user terminal enters, the controller operates according to the intention of the administrator.

Korea Patent Registration No. 10-1893963 Korea Patent Registration No. 10-1680137

The present invention is a means for solving the above problems, an object of the present invention is to provide a device based on the intent framework provided by Onos in an environment using an SDN controller called ONOS in an SDN (Software Defined Network) network It allows you to program networking at an abstract level, rather than programming at every detail, thereby providing a path to traffic flows from source to destination. The present invention provides a method for performing efficient resource management based on an intent and a system for operating the same, so that the flow can be uniformly transmitted.

As a means for solving the above-described problems, in the embodiment of the present invention, as shown in Figs. 1 to 3, intent-based resource management is performed in a software defined network (SDN). A system, comprising: a user terminal (UE; 10) accessing a network via a wired or wireless communication network; A front-end that configures intents for network configuration devices according to the user terminal, presents configured intents, and allows a network administrator to retrieve and edit configured intents from a database. 110) and class variables for intents received from the network manager, and converted to JSON (JavaScript Object Notation) for external transmission, or for receiving messages from outside and storing them in a database. Intent based networking (IBN) manager 100 including back-end 120; And providing an optimized path by receiving an input for an intent from the IBN manager 100, receiving an input for an intent for a source and destination pair from the IBN manager 100, and dying SDN controller 200 for calculating the optimal path or the shortest path through the Dijkstra algorithm, converting the calculated optimal or shortest path into JSON and transmitting the same to the intent manager 220. To provide a system for performing intent-based resource management in a software defined network.

In this case, the SDN controller 200 receives an input of an intent for a source and destination pair from the IBN manager 100, and then uses an Dijkstra algorithm to obtain an optimal path or An SPM module 210 for calculating the shortest path, converting the calculated best or shortest path into JSON and transmitting the same to the intent manager 220; An intent manager 220 which is a module belonging to an intent framework and directly communicates with the SPM module 210 and receives a change of an intent and installs it in switches of a network; A flow rule manager 230 for managing a path of a flow for an intent input from the IBN manager; A topology manager 240 for changing and managing topology; A host manager 250 for managing information about the topology and the host generating the change of the topology; It can be configured to include.

In addition, the SPM module 210 includes: an event handler module 211 which always monitors the topology and checks whether there is a change in the topology, and sends a request to the request handler when a change is found in the topology; The request handler module 212 receives the request from the event handler module 211 and obtains a request and a rule including all information about the host that has made a change in the topology and the topology, and passes the entire data to the Flow Rule manager module. ; A flow rule manager module 213 for checking the existence of a flow rule associated with a host in a flow rule obtained from the flow rule manager 230 and determining a type of a graph required for the strata algorithm; A graph generation module 214 for collecting information from the request handler module 212 and generating a weighted graph; A dykstra module 215 for outputting a shortest path between all nodes of the weighted graph generated by the graph generating module 214 through a dikstra algorithm; And a translator module 216 for converting the output of the dykstra module 215 into a JSON request of the point-to-point intent of the SDN controller 200. It can be configured as a system.

In this case, the request handler module 212 receives the JSON request from the converter module 216 and transmits it to the intent manager 220 of the SDN controller 200, and the intent manager 220 is It can be configured as a system for performing intent-based resource management in a software defined network that installs intentions according to the transmitted JSON request in network configuration switches according to user terminals.

In another embodiment of the present invention, intent-based resource management in the SDN (Software Defined Network) by applying a system for performing intent-based resource management in the above-described software defined network In the case of receiving an input for an intent for a source and destination pair from the intent based networking (IBN) manager 100 to the smart path manager (SPM) module 210, Calculate and provide an optimized path for the intent, but if there is no record of the flow of the intent input through the event handler module 211 that monitors the topology change, a new flow Is 1, the flow path is allocated between the switches constituting the network according to the user terminal through the flow rule manager module 213, and 2) yes. After generating a graph by assigning weights to the corresponding link in the generation module 214 according to the number of flows, 3) all nodes of the weighted graph through the Dijkstra algorithm in the dikstra module 215. 4) convert the output for the shortest path into a JSON request via the converter module 216, and send it to the intent manager 220 in the SDN controller 200, and 5) the intent. The manager 220 may provide a method for performing intent-based resource management in a software defined network that installs intentions for such changed intents in all switches in the network.

Furthermore, in another embodiment of the present invention, the intent-based resource management in the SDN (Software Defined Network) by applying a system for performing intent-based resource management in the above-described software defined network In the method, when an Intent based networking (IBN) manager 100 receives an input for an intent for a source and destination pair from the Smart Path Manager module 210, Calculate and provide the optimized path for the tent, but if there is a record of the flow of the intent input through the event handler module 211 for monitoring the topology change, 1-1) The flow path is allocated between the switches constituting the network according to the user terminal through the flow rule manager module 213, and 1-2) the existing graph is generated by the graph generation module 214. After drawing the graph by adding the new value 1 and assigning the weight to the frame, 1-3) In the Dikstra module 215, the shortest path between all nodes of the weighted graph is obtained through the Dijkstra algorithm. 1-4) through the converter module 216, convert the output for the shortest path into a JSON request, and send it to the intent manager 220 in the SDN controller 200, 1-5) the intent manager 220 Intent) provides a way to perform intent-based resource management in a software-defined network that installs the intent for these modified intents on all switches in the network.

In this case, the input for the intent for the source and destination pair from the Intent based Networking (IBN) manager 100 to the Smart Path Manager (SPM) module 210 in the embodiment of the present invention. In the step of receiving, when a change occurs in the existing topology, an input for the changed topology is received through the event processor module 211, and then, steps 1) to 5) or 1-1) to It is possible to provide a method for performing intent-based resource management in a software defined network performing steps 1-5).

In another embodiment of the present invention, a program for performing a method for performing intent-based resource management in the software-defined network described above can provide a computer-readable recording medium having recorded thereon.

According to an embodiment of the present invention, in an environment using an SDN controller called ONOS in an SDN (Software Defined Network) network, programming is not made according to the details according to the device based on the intent framework provided by Onos. It allows you to program networking at an abstract level, providing a path to traffic flows from source to destination so that the flow can be transmitted evenly. It is effective.

Therefore, according to an embodiment of the present invention, through the smart path manager module (SPM; Smart Path Manager), it is possible to provide efficient resource management of the network due to the maximum link utilization of the network, to maintain improved traffic distribution of the network This has the advantage that it can lead to optimization of the processing speed of all switches.

Furthermore, when mobility is considered, flow rule redundancy may be reduced in an open flow table. This is because the Smart Path Manager module (SPM) in the present system only provides new paths for changed chunks and maintains the remaining paths to the previous paths to provide end-to-end connectivity.

1 is a block diagram showing the main configuration of a system for performing intent-based resource management in a software defined network according to the present invention.
FIG. 2 is a block diagram illustrating a detailed configuration of an SDN controller in a system for performing intent-based resource management in a software defined network.
3 is a block diagram showing a detailed configuration of an SPM module.
4 is a conceptual diagram illustrating a system configuration of the present invention according to FIGS. 1 and 2.
FIG. 5 is a flow chart illustrating the functionality of a back end in the IBN manager in FIG. 1.
6 is a flowchart illustrating the function of the SPM module in FIG.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

In this specification, the embodiments are provided so that the disclosure of the present invention may be completed and the scope of the present invention may be completely provided to those skilled in the art. And the present invention is defined only by the scope of the claims. Thus, in some embodiments, well known components, well known operations and well known techniques are not described in detail in order to avoid obscuring the present invention.

The configuration provided in the embodiment of the present invention is an apparatus based on an intent framework provided by Onos in an environment using an SDN controller called ONOS in an SDN (Software Defined Network) network. It allows you to program networking at an abstract level, rather than programming at every detail, and provides a path for traffic flows from source to destination. It is a main idea to present a technical configuration that allows the flow to be transmitted uniformly.

1 is a block diagram showing the main configuration of a system for performing intent-based resource management in the software defined network according to the present invention (hereinafter referred to as the present invention). FIG. 2 is a block diagram illustrating a detailed configuration of an SDN controller in a system for performing intent-based resource management in a software defined network. 3 is a block diagram showing a detailed configuration of an SPM module.

1 to 3, the present invention provides a system for performing intent-based resource management in a software defined network (SDN), comprising: a user terminal (UE) accessing a network through a wired or wireless communication network; 10) and a front-end for configuring intents for network configuration devices according to the user terminal, presenting configured intents, and allowing network administrators to retrieve and edit configured intents from a database. (front-end; 110) and class variables for intents received from the network administrator, converted to JSON (JavaScript Object Notation) for external transmission, or externally received messages to the database Intent based networking (IBN) manager 100 that includes a back-end 120 to store and input to an intent in the IBN manager 100. Provides the optimized path, but receives the input of the intent for the source and destination pair in the IBN manager 100, the optimal path or the shortest through the Dijkstra algorithm The SDN controller 200 may be configured to calculate a path, convert the calculated best or shortest path into JSON, and transmit the converted path to the intent manager 220.

The IBN manager 100 is a system belonging to an administrator domain. The IBN manager 100 is not configured for real-time situation coping, but corresponds to a configuration for configuring the entire system according to a UE (user equipment). To this end, in the embodiment of the present invention, the IBN manager 100 to manage the intent-based flow in the Intent framework of Onos (Open Network Operating System), Intent Enter (intent), perform front-end (Front-end) 110 and intents received from network manager, convert class variables, convert to JSON (JavaScript Object Notation), and perform external transmission. It can be configured to include a back-end (120) for receiving a message transmitted from the outside and storing it in a database.

In this case, the user equipment (operator terminal or user terminal; UE) in the embodiment of the present invention may be a mobile communication terminal or a computer capable of wired and wireless communication (including Internet communication). In this case, the mobile communication terminal may be any one of a PDA (Personal Digital Assistant), a smart phone or a tablet PC. In addition, the user terminal may include a wired / wireless communication unit, an A / V input unit, a user input unit, a sensing unit, an output unit, a memory, an interface unit, a controller, a power supply unit, and the like. All of the above components are not essential and may be added or subtracted according to characteristics.

4 is a conceptual diagram of the system according to FIG. 1, and FIG. 5 is a flow chart illustrating the functionality of the back end 120 in FIG. 1.

Referring to FIGS. 5 and 5 with reference to FIG. 1, in the embodiment of the present invention, the front-end 110 in the IBN manager 100 may include network configuration devices (switches) according to various UEs (user equipments). It configures intents for, displays the configured intents, and provides the network administrator with the ability to retrieve and edit the configured intents from the database.

In addition, the back-end 120, as shown in Figures 4 and 5, for the various intents for the source and destination paired from the network (network) manager , Converts it into a class variable and converts it back into JavaScript Object Notation (JSON) and sends it to the Smart Path Manager (SPM) module 210, which is an Onos application, and receives the message from the SPM module 210 as JSON again. It stores the data again in the database. A database refers to a general data structure implemented in a storage system (hard disk or memory) of a computer system using a database management program. The database stores data for freely searching (extracting), deleting, editing, and adding data. It means form. These databases can be relational database management systems such as oracle, infomix, sybase, DB2, or object-oriented database management systems such as gemston, orion, O2, and exelons. It can be implemented for the purpose of the present invention using an XML-only database such as excelon, tamino, sekaiju, etc., and appropriate fields or elements to achieve its function. You can have

The function of the SDN controller 200 in conjunction with the above-described IBN manager 100 is as follows.

The SDN controller 200 receives an input for an intent from the IBN manager 100 and provides an optimized path, but provides an intent for a source and destination pair in the IBN manager 100. In response to the input, the optimal path or the shortest path is calculated through the Dijkstra algorithm, and the calculated optimal or shortest path is converted into JSON and transmitted to the intent manager 220.

To this end, the SDN controller 200, as shown in Figures 2 and 4, the IBN manager 100 receives an input for the intent for the source (destination) and the destination (destination) pair, the dyke The SPM module 210 calculates an optimal path or a shortest path through a Dijkstra algorithm, converts the calculated optimal or shortest path into JSON, and transmits the converted path to JSON.

Furthermore, as a module belonging to the intent framework, an Intent manager 220 directly communicating with the SPM module 210 and receiving a change of the intent and installing the switches in the network network, the IBN manager A flow rule manager 230 for managing a path of a flow for an intent input from a port, a topology manager 240 for changing and managing a topology, and a topology and topology It can be configured to include a host manager (250) for managing information about the host generating the change.

The SPM module 210 may react in real time against the IBN manager. In addition, in the embodiment of the present invention, as an Onos application, an intent manager, a flow rule manager, a topology manager, and a host manager, which are modules belonging to Onos' intent framework, Communicate directly with the Hosts manager.

To this end, the SPM module 210 can be provided with a configuration and function as shown in Figs.

Specifically, the SPM module 210 includes an event handler module 211 that always monitors the topology and checks whether there is a change in the topology, but sends a request to the request handler when a change is found in the topology. That is, the event handler module is a core module that always monitors the topology and checks whether there is a change in the topology. It also sends a request to the request handler when a change is found in the topology. The request consists of the topology and all the information about the host that made the change in the topology.

In addition, the request handler module for receiving a request from the event handler module 211, taking a request and a rule including all information about the host that has made a change in the topology and transferring the entire data to the Flow Rule Manager module ( 212). In this case, the request handler module receives the request from the event handler module, takes all the flow rules, and delivers the entire data to the following flow rule manager module.

Furthermore, a flow rule manager module 213 is configured to check the existence of a flow rule related to a host in a flow rule obtained from the flow rule manager 230 and to determine a type of a graph required for a dikstra algorithm. . In this case, the flow rule manager module 213 checks the existence of a flow rule related to the host in the flow rule obtained from the ONOS flow rule manager 230. Further, the flow rule manager module 213 determines the graph type required for the Dijkstra algorithm.

Furthermore, after collecting information from the request handler module 212, the shortest path between the graph generation module 214 for generating a weighted graph and all nodes of the weighted graph generated by the graph generation module 214 is determined. Including a dikstra module 215 for outputting through the Dikstra algorithm and a converter module 216 for converting the output by the dykstra module 215 into a JSON request of the point-to-point intent of the SDN controller 200, Can be configured. For example, it consists of a Point to Point (P2P) converter module to convert the output of the Dijkstra algorithm into a JSON request of point-to-point intents of the ONOS controller.

In addition, the request handler module 212 receives the JSON request from the converter module 216 and transmits it to the intent manager 220 of the SDN controller 200, and the intent manager 220 transmits the request. It can function to install the intention according to the JSON request to the network configuration switches according to the user terminal.

The SPM module of the present invention having the above-described structure may implement a function as shown in FIG. 6. That is, intent-based resource management is performed in a software defined network by applying the system structure of the present invention as described above with reference to FIGS. 1 to 3, wherein the SPM module first transmits a source and a destination from an IBN manager. Receiving input for an intent for a pair can provide an optimized path in two cases.

First, in the first case, without a record of the flow, the optimal path is calculated through the Dijkstra algorithm based on the static topology when a new flow comes in. At this time, if a flow path is allocated between the switches, the weight is assigned to the corresponding link according to the number of flows to draw a graph, and then the shortest path through the Dijkstra algorithm. We obtain and pass it back to the Intent manager in the Onos controller through the converter.

In an embodiment of the present invention having the above processes sequentially configured, the InBN (Intent based Networking) manager (100), the SPM (Smart Path Manager) module 210 to the source (destination) and the destination (destination) pairs (destination) If you receive input for a tent, calculate and provide an optimized path for that intent,

When there is no record of the flow of intents input through the event handler module 211 that monitors the change of topology, and when a new flow is entered,

1) Through the flow rule manager module 213, a flow path is allocated between switches constituting a network according to a user terminal.

2) After the graph generation module 214 draws a graph by assigning a weight to a corresponding link according to the number of flows,

3) In the Dikstra module 215, find the shortest path between all nodes of the weighted graph through the Dijkstra algorithm,

4) through the converter module 216, converts the output for the shortest path into a JSON request, sends it to the intent manager 220 in the SDN controller 200,

5) Intent Manager 220 installs the intent for this changed intent on all switches in the network,

Intent-based resource management can be performed in software-defined networks.

Next, the SPM module 210 first receives an input of an intent for a source and destination pair from the IBN manager, and then the source and destination pair received from the IBN. If the intents for are in the record for that flow in the existing switches, we add a new value of 1 to the existing link and use the Dijkstra algorithm to find the shortest path.

Point to Point (P2P) Intent Converter converts the created path into JSON format and sends it to Onos' Intent Manager, which installs these intents on the switches.

The above processes are listed in order according to the configuration of the present system.

If the Intent based networking (IBN) manager 100 receives input to an intent for a source and destination pair from the Smart Path Manager (SPM) module 210, the optimization for the intent Calculate and provide a route,

If there is a record of that flow of intents entered through the event handler module 211 monitoring the change in topology,

1-1) Through the flow rule manager module 213, a flow path is allocated between the switches constituting the network according to the user terminal.

1-2) After the graph generation module 214 adds a new value 1 to the existing link and assigns a weight to draw a graph,

1-3) In the Dikstra module 215, obtain the shortest path between all nodes of the weighted graph through the Dijkstra algorithm,

1-4) through the converter module 216 converts the output for the shortest path into a JSON request, sends it to the intent manager 220 in the SDN controller 200,

1-5) As the intent manager 220 installs the intent for the changed intent on all switches in the network,

Intent-based resource management can be performed in software-defined networks.

If a change occurs in the existing topology, the input is received through an event handler module, and the inputs of the above two IBN managers are processed in the same order as the SPM module.

The SPM module in the present invention provides efficient resource management of the network due to the maximum link utilization of the network. This maintains the network's improved traffic distribution, which in turn can lead to optimized throughput for all switches. In consideration of mobility, flow rule redundancy may be reduced in an open flow table. This is because the SPM keeps only the new path for changed chunks and keeps the rest of the old path to provide end-to-end connectivity. In addition, embodiments of the present invention are presented as additional applications in an Onos controller.

Therefore, in the present invention, by presenting a Smart Path Manager (SPM) with the IBN manager, an Onos module, intelligent distribution of flow rules in an SDN network can enable maximum efficiency of network resources.

The function of streamlining the intent resources by applying the SPM module provided by the present invention can be programmed and provided. In the present invention, a computer-readable recording medium having such an application program recorded therein is provided by a computer or a computer. It can be executed using a mobile communication terminal (for example, smart phone, tablet PC). In this case, the application program may be installed on a hard disk of a computer, installed on a CD-ROM or a DVD-ROM, or installed on a USB memory and executed. In addition, it can be installed and executed in various playback devices.

In addition, a communication network to which the system of the present invention is applied is a network capable of wired and wireless communication, and is a mobile communication network installed by a telecommunication company (including 3G network, 4G network, 5G network, WiBro network, LTE network), Internet network / It may include a public switched telephone network (PSTN) network.

The configuration and performance of the Kalman filter module implemented in the edge controller applied to the present invention can be represented by functional block configurations and various processing steps. Such functional blocks may be implemented in various numbers of hardware or / and software configurations that perform particular functions. For example, the present invention relates to integrated circuit configurations such as memory, processing, logic, look-up table, etc., which may execute various functions by the control of one or more microprocessors or other control devices. It can be adopted.

Similar to what the components of the present invention can be implemented in software programming or software elements, the present invention includes various algorithms implemented in data structures, processes, routines or other combinations of programming constructs, including C, C ++ It may be implemented in a programming or scripting language such as Java, assembler, or the like. Functional aspects may be implemented in algorithms running on one or more processors. In addition, the present invention may employ the prior art for electronic environment setting, signal processing, and / or data processing. Terms such as "mechanism", "element", "means", "configuration" can be used broadly and are not limited to mechanical and physical configurations. The term may include the meaning of a series of routines of software in conjunction with a processor or the like.

As described above, the technical spirit of the present invention has been described in detail in the preferred embodiments, but the above-described preferred embodiments are for the purpose of description and not of limitation. As such, those skilled in the art may understand that various embodiments are possible through the combination of the embodiments of the present invention within the scope of the technical idea of the present invention.

10: user terminal 20: database
100: IBN Manager 110: Front-Ed
120: back-end 200: SDN controller
210: SPM module 220: Intent Manager
230: Flow rule manager 240: Topology manager
250: host manager

Claims (8)

In the system for performing intent-based resource management in the Software Defined Network (SDN),
A user terminal (UE) 10 accessing a network through a wired or wireless communication network;
A front-end for configuring intents for network configuration devices according to the user terminal, presenting configured intents, and allowing administrators of the network to retrieve and edit intents configured from a database. -end; 110 and classifies the intents of the source and destination pairs received from the administrator of the network, converts them into JSON (JavaScript Object Notation), and performs external transmission. Or an IBN manager 100 including a back-end 120 which receives a message transmitted from the outside and converts it back into a class variable and stores it in a database; And
Provides an optimized path by receiving the input of the intent from the IBN manager 100, receives the input of the intent from the IBN manager 100, the optimal path or the shortest through the Dijkstra algorithm An SDN controller 200 for calculating a path, converting the calculated best or shortest path into a JSON format and installing the same in the network components; Containing,
Intent-based resource management in a software-defined network. The method of claim 1,
The SDN controller 200,
The IBN manager 100 receives an input of an intent for a source and destination pair, calculates an optimal path or a shortest path through a Dijkstra algorithm, and calculates the optimal or calculated path. An SPM module 210 for converting the shortest path into JSON and transmitting the same to the intent manager 220; and
A module belonging to an intent framework, which directly communicates with the SPM module 210,
An intent manager 220 that receives a change of an intent and installs it in switches of a network;
A flow rule manager 230 for managing a path of a flow for an intent input from the IBN manager;
A topology manager 240 for changing and managing the topology;
A host manager 250 for managing information about the topology and the host generating the change of the topology; Containing,
Intent-based resource management in a software-defined network. The method of claim 2,
The SPM module 210,
An event handler module 211 that always monitors the topology and checks if there are changes in the topology, but sends a request to the request handler when a change is found in the topology;
The request handler module that receives the request from the event handler module 211 and obtains a request and a rule including all information on the topology and the host that has made a change in the topology, and passes the entire data to the flow rule manager module 213. 212;
A flow rule manager module 213 for checking the existence of a flow rule associated with a host in a flow rule obtained from the flow rule manager 230 and determining a type of a graph required for a Dijkstra algorithm;
A graph generation module 214 for collecting information from the request handler module 212 and generating a weighted graph;
A dykstra module 215 for outputting a shortest path between all nodes of the weighted graph generated by the graph generating module 214 through a dikstra algorithm; And
A converter module 216 for converting the output of the dykstra module 215 into a JSON request of the point-to-point intent of the SDN controller 200;
Including,
Intent-based resource management in a software-defined network. The method of claim 3,
The request handler module 212,
Receives a JSON request from the converter module 216 and transmits to the intent manager 220 of the SDN controller 200,
The intent manager 220 installs intentions according to the transmitted JSON request in the network configuration switches according to the user terminal.
Intent-based resource management in a software-defined network. A method of performing intent-based resource management in a software defined network (SDN) by applying a system according to claim 4,
If the Intent based networking (IBN) manager 100 receives input to an intent for a source and destination pair from the Smart Path Manager (SPM) module 210, the optimization for the intent Calculate and provide a route,
When there is no record of the flow of intents input through the event handler module 211 that monitors the change of topology, and when a new flow is entered,
1) a flow path is allocated between the switches constituting the network according to the user terminal through the flow rule manager module 213,
2) After the graph generation module 214 draws a graph by assigning a weight to a corresponding link according to the number of flows,
3) In the Dikstra module 215, find the shortest path between all nodes of the weighted graph through the Dijkstra algorithm,
4) through the converter module 216, converts the output for the shortest path into a JSON request, sends it to the intent manager 220 in the SDN controller 200,
5) Intent Manager 220 installs the intent for this changed intent on all switches in the network,
Intent-based resource management in a software-defined network. A method of performing intent-based resource management in a software defined network (SDN) by applying the system according to claim 4,
If the Intent based networking (IBN) manager 100 receives input to an intent for a source and destination pair from the Smart Path Manager (SPM) module 210, the optimization for the intent Calculate and provide a route,
If there is a record of that flow of intents entered through the event handler module 211 monitoring the change in topology,
1-1) a flow path is allocated between the switches constituting the network according to the user terminal through the flow rule manager module 213,
1-2) After the graph generation module 214 adds a new value 1 to the existing link and assigns a weight to draw a graph,
1-3) In the Dikstra module 215, obtain the shortest path between all nodes of the weighted graph through the Dijkstra algorithm,
1-4) through the converter module 216 converts the output for the shortest path into a JSON request, sends it to the intent manager 220 in the SDN controller 200,
1-5) Intent Manager 220 installs the intent for this changed intent on all switches in the network,
Intent-based resource management in a software-defined network. The method according to claim 5 or 6,
Receiving an input for an intent for a source and destination pair from the intent based networking (IBN) manager 100 to the Smart Path Manager (SPM) module 210,
If there is a change in the existing topology, the input for the changed topology is received through the event handler module 211,
Thereafter, the steps 1) to 5) or the steps 1-1) to 1-5) are performed.
Intent-based resource management in a software-defined network. A computer-readable recording medium having recorded thereon a program for performing a method for performing intent-based resource management in a software defined network according to claim 5.

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