KR20180050999A - An exclusive line configuration system and method using mobile backhaul network slicing - Google Patents

Abstract

In order to allow an exclusive line configuration system including a switch installed at a backhaul start point and a controller implemented by an SDN to configure an exclusive line system, the controller receives a line configuration request signal for a user, and calculates a circuit path to be newly configured, based on device information and network connection information stored in advance. It configures a line for a service which the user receives by calling the interface of each device located on the calculated line path. The dualization of backhaul traffic can be realized.

Description

[0001] The present invention relates to an exclusive line configuration system and method using mobile backhaul network slicing,

The present invention relates to a system and method for dedicated line configuration through slicing mobile backhaul networks.

Recently, mobile networks are providing services to users based on 4G mobile communication (4G), but various technologies are being developed to evolve into 5G mobile communication (5G) by 2020. Most of the technologies are wireless related technologies, aiming at providing a high bandwidth between the terminal and the base station and providing low latency. In addition to this, there is an active discussion of the network structure.

Currently, the LTE network structure is wired between a wireless unit and a digital unit, and is wired between a digital unit and a switching unit. Here, the connection between the radio unit and the digital unit is called a front hole, and the connection between the digital unit and the exchange is called a backhaul.

If the current network structure is 5G, since it needs to provide several bandwidths per terminal, not only the front hole but also the backhaul will cause traffic overload. In addition, services such as Vehicle to Everything (V2X) require very low latency because they require information from the user or information from the service providing system in real time.

Accordingly, the present invention provides a dedicated line configuration system and method by slicing a mobile backhaul network capable of duplicating backhaul traffic.

According to another aspect of the present invention, there is provided a dedicated line configuration system implemented by SDN (Software Definition Network)

A service controller for generating a network configuration information as a template using a leased line configuration request signal including information on the specific service and information on the customer to generate a packet transmission path to a customer subscribed to the specific service; A network controller for generating the packet transmission path based on device information and network connection information stored in advance for a backhaul section from a switch to which a plurality of DUs are connected to an EPC dedicated to a customer, and the generated template; And an interface for calling an interface of a plurality of devices on the packet transmission path according to the packet transmission path generated by the network control unit.

The controller may include a storage unit for storing device information and network connection information for each of a plurality of devices of the backhaul section and providing the device information to the network controller.

Wherein the network control unit comprises: a topology management module for receiving a template from the service control unit and receiving equipment information and network connection information from the storage unit; A path design module for calculating at least one packet transmission path for the backhaul section upon receiving the template, equipment information, and network connection information; And a configuration module for verifying one or more packet transmission paths calculated by the path design module to select one packet transmission path and attempting to establish an interface connection with the equipment on the selected packet transmission path.

Wherein the configuration module includes: a device-specific setting module for generating one or more setting sets in consideration of an equipment model for the equipment on the at least one packet transmission path, a packet processing spare capacity of the equipment, and the like; A verification module for collecting status information about target devices on the packet transmission path in real time for each of the generated configuration sets and selecting one path for the template among the one or more paths based on the collected status information; And an interface module for each device that attempts to establish an interface connection by calling interfaces of the devices of the selected one packet transmission path.

According to another aspect of the present invention, there is provided a method for configuring a leased line,

Receiving a line configuration request signal for a customer subscribed to a specific service from a business provision system managing the service; It is possible to confirm all equipment information and network connection information installed in a backhaul section from a switch to which a plurality of DUs are connected to a customer-specific EPC or a common EPC to provide the specific service, Calculating; And calling the interface of each equipment located on the calculated line path to construct a line of the backhaul section for the service to be provided by the customer.

Wherein the line configuration request signal includes service profile information for the customer, and the step of receiving the line configuration request signal includes receiving, from the service profile information, identification information of the customer subscribed by the customer, And extracting the identification information to automatically generate the template.

Calculating the circuit path includes: calculating at least one path for the template based on the generated template, all equipment information of a backhaul section stored in advance, and network connection information; Constructing at least one set of settings based on at least one or more paths; And

Collecting status of the target devices, and selecting a path to one of the at least one configuration set as a circuit path.

Identifying a destination port based on IP information of a packet received by a switch installed at a start point of the backhaul section and dividing the destination port into a first packet or a second packet after the step of configuring the line; Routing the packet at the backhaul starting point so that the packet separated by the first packet is forwarded to the common EPC; And routing the packet to be transmitted to the customer dedicated EPC, wherein the first packet is traffic for a general IP network, and the second packet is a service for providing a preset service to a customer ≪ / RTI >

According to the present invention, a network of enterprise customers can be configured from a mobile backhaul to a dedicated cloud using a software-based control system, thereby providing a differentiated line service for each company.

1 is an exemplary view of a general network structure.
2 is a diagram illustrating an example of connection of a network device in a general network structure.
FIG. 3 is an exemplary diagram illustrating a general use network hierarchically.
FIG. 4 is a diagram illustrating an example of a request for a delay time of a radio section.
5 is an exemplary diagram of a network structure to which a leased line configuration system according to an embodiment of the present invention is applied.
6 is a structural diagram of a controller according to an embodiment of the present invention.
7 is a structural diagram of a network control unit according to an embodiment of the present invention.
8 is a flowchart of a dedicated line configuration method according to an embodiment of the present invention.
FIG. 9 is an exemplary diagram illustrating a network classification in an existing network and in a network according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS) An access terminal (AT), and the like, and may include all or some of functions of a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment, and the like.

In this specification, a base station (BS) is an access point (AP), a radio access station (RAS), a node B, a base transceiver station (BTS) Mobile Multihop Relay) -BS, and may include all or some of the functions of an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a software defined network control system and method using a mobile backhaul network slicing according to an embodiment of the present invention will be described with reference to the drawings. Before signing an embodiment of the present invention, a general network structure will be described with reference to Figs. 1 to 3. Fig.

FIG. 1 is an exemplary diagram illustrating a general network structure, and FIG. 2 is an exemplary diagram illustrating a network device connection in a general network structure. And FIG. 3 is an exemplary diagram showing a general commercial network hierarchically.

1, a network that provides services based on the fourth generation mobile communication 4G to the terminal 10 is wirelessly connected between the terminal 10 and the RU 20, and the RU 20 ), The DU 30 (30), and the DU 30 (30) are connected to each other by wire.

The RU 20 to which a plurality of terminals 10 are connected includes an antenna for transmitting a radio signal from the DU 30 to the terminal 10 or from the terminal 10 to the DU 30, coverage.

Although the DU 30 is shown as being connected to the RU 20 in a 1: 1 manner, a plurality of RUs 20 may be connected to the DU 30. Also, one RU 20 may be connected to a group (hereinafter, referred to as DU Pool) in which a plurality of DUs are gathered.

The DU 30 includes data processing components for processing a signal received from the terminal 10 or a signal to be transmitted to the terminal 10. The DU 30 is connected to the network and transmits a signal received from the terminal 10 to a network And transmits the signal received from the RU 20 to the terminal 10. The RU 20 transmits the received signal to the RU 20, The functions of the RU 20 and the DU 30 are already known, and a detailed description thereof will be omitted in the embodiment of the present invention.

Although this general network appears to consist of a single network for common use, the network equipment forming the network is divided into several layers. This will be described with reference to FIG.

As shown in Fig. 2 (a), it appears as if the network devices are connected in the plane. However, in actual, as shown in FIG. 2 (b), a signal may be transmitted / received through a transmission section in a certain section, an optical cross-connect (OXC), a re- Drop Multiplexer), Packet Transport Network (PTN), and Passive Optical Network (PON). This depends on which technology and equipment the telecommunication service provider provides to build the network.

As shown in FIG. 2C, if it is assumed that a signal is transmitted from a start point to an arrival point, it can be connected to three paths in the interval 2. Assuming that the path 2 is selected, as shown in (d) of FIG. 2, the transmission path (1) in the segment 2 is logically generated using the PTN, and the connection path (②), and the end point of the transmission section and the network equipment at the end (③).

3, the DU Pool 50 is connected to the exchange 40 and provides services such as call processing and Internet connection as the final voice call. The DU Pool (50) is also installed in the centralized location (not shown) of the exchange equipment (Core Network equipment) and connected to the DUs (30) nationwide by wire.

At this time, the DUs 30 attempt to connect to the wired backhaul (dashed line in FIG. 2) with a long-distance line for connection to the exchange 40 because the exchange equipment is mainly concentrated in the center. Here, the backhaul line is used for terminal handover handover in addition to the connection between the DU 30 and the exchange 40.

The handover is a technique for preventing the connection to the network from being disconnected even if the RU and the DU are changed while the terminal 10 moves in the in-service state. To do this, the backhaul line is used for communication between the DUs, in order to exchange the profile information of the subscribing subscriber with another DU which is changed.

As described above, when the 5G mobile communication (5G) service is provided based on the 4G network structure mentioned in FIGS. 1 to 3, the following problems occur. First, to provide up to 150Mbps of bandwidth per terminal up to 4G LTE, the bandwidth of the wired transmission section between RU and DU is provided at 2.45Gbps per RU. However, in 5G, since a bandwidth of several Gigahertz (GHz) is required for each terminal, not only the front hole but also the backhaul traffic overload occurs.

Since the backhaul is made up of an IP network and is routed to an IP protocol (for example, OSPF), no other control is required. Therefore, even if traffic increases on the backhaul, it can not be controlled. Therefore, if traffic increases at all DUs, the bandwidth of the backhaul transmission network can not be increased as a whole. In addition, if traffic increases in a particular DU, the backhaul between the DU and the switching equipment is not physically or logically separated, thus affecting other backhaul traffic of other DUs without problems.

FIG. 4 is a diagram illustrating an example of a request for a delay time of a radio section.

As shown in FIG. 4, in the 4G, the delay time of the radio section is 10 ms and the end-to-end delay time is used within 50 ms. However, in order to prepare for a new service for 5 G, the delay time of the radio section is 1 ms End-to-end (E2E) delay time should be within 5ms.

In order to reduce the backhaul traffic and the end-to-end delay time to be increased in 5G, the embodiment of the present invention proposes a system and a method for configuring a leased line as well as controlling and applying SDN (Software Definition Network) to a backhaul. This will be described with reference to FIG.

5 is an exemplary diagram of a network structure to which a leased line configuration system according to an embodiment of the present invention is applied.

As shown in FIG. 5, a network according to an embodiment of the present invention includes a plurality of RUs 210 associated with DU 220. The DU 220 receives an outer IP header, a UDP header, a GTP header, and the like in a packet when receiving a packet including an IP header, an IP payload, And then transmits it to the switch 230.

The general terminal, the IoT terminal of the A company, and the B service terminal may be scattered and located in the same DU. Therefore, in order to provide the packets transmitted from the terminals with different EPCs, all of the destination IPs of the packets are assigned differently . Therefore, the MME (Mobility Management Entity) queries the subscriber profile of the HSS (Home Subscriber Server) or allocates the SGW and the PGW (Evolved Packet Core) according to the internal routing rule. The respective header types and functions are already known, and detailed description will be omitted in the embodiment of the present invention.

The switch 230 connected to the DU 220 routes the destination IP of the packet transmitted from the DU 220 to one of the plurality of EPCs 250 and 260. The switch 230, in conjunction with the controller 240, routes the packet based on the path set by the controller 240.

In the embodiment of the present invention, the controller 240 is implemented as an SDN. In the embodiment of the present invention, the controller 240 is referred to as a dedicated circuit configuration system for convenience of explanation, but it is not necessarily limited thereto.

The controller 240 establishes a circuit path from the starting point of the backhaul to the EPC in order to separately accommodate the IP line and the large capacity traffic accommodating the existing IP traffic. The controller 240 separates the traffic packet from the start point of the backhaul according to the purpose of the traffic, and provides the separated traffic packet. Accordingly, differentiated QoS and SLA (Service Level Agreement) can be provided to the users in the embodiment of the present invention.

In the embodiment of the present invention, the position of the switch 230 is defined as the starting point of the backhaul. The switch 230 aggregates all of the plurality of DUs 220 and connects them to the backhaul network. To this end, in the embodiment of the present invention, the switch 230 is implemented as an L3 switch.

In the embodiment of the present invention, if the traffic is traffic for the general IP network, the packet transmitted to the DU 220 is transmitted to the first EPC 250. If the traffic is the special-purpose traffic, As shown in Fig. Here, the special purpose traffic refers to a service (eg, a company) to a customer (for example, a company) by using a dedicated exchange such as a heavy industry company, an asset management corporation or a government agency that installed numerous IoT terminals in a car company or a large factory ≪ / RTI > The first EPC 250 refers to a general purpose EPC and the second EPC 260 refers to a special purpose EPC (Private EPC or Mission Critical EPC).

The switch 230 separates the destination port by looking at the IP included in the packet transmitted from the DU 220 and routes the packet to either the first ECP 250 or the second ECP 260. That is, if it is confirmed that the packet is to be transmitted to the second EPC 260 by looking up the header information in the packet to be uploaded by the terminal, the switch 230 routes the packet so that the packet is transmitted in a path different from the traffic of the general terminal. The packet between the terminal and the exchange uses a GTP (GPRS Tunneling Protocol) packet and attaches an IP header to the exchange.

The DU 220 attaches a GTP (GPRS Tunneling Protocol) header to a packet transmitted by the UE, where the GTP header corresponds to an outer IP indicating which S-GW (not shown) the packet is to be transmitted. Accordingly, the switch 230 determines only the destination IP in the header corresponding to the outer IP and determines the routing path. This is already known, and a detailed description thereof will be omitted in the embodiment of the present invention.

In order for the switch 230 to route the packet to any one of a plurality of EPCs, the controller 240 needs to be connected to the IP terminal and configured in the transmission network. In order for the switch 230 to route the packet to the selected EPC and deliver it, it is necessary to know the route through which the packet is to be transmitted, and the controller 240 determines it and informs the switch 230 of the packet.

When the controller 240 determines the connection of the IP terminal and the configuration in the transmission network and does not inform the switch 230, a routing protocol such as Open Shortest Path First (OSPF) is executed in the IP network, Lt; / RTI > Therefore, it is difficult to guarantee the QoS requested by the customer.

The controller 240 performs the following three functions. First, the switch 230 establishes a path along the packet to route the flow, and informs the switch 230 of the set path. The flow is defined as a group. In the embodiment of the present invention, the switch 230 refers to the destination IP and port information of the packet and routes the packet to the path set by the controller 240 in advance.

Secondly, the controller 240 controls the bandwidth by monitoring the status of the traffic in the transmission period in which the actual traffic is transmitted. All transmission equipment transmits and receives information to and from the controller 240 in real time. The controller 240 then increases the bandwidth used by the DU to transmit traffic when an overload occurs in the traffic from a particular DU. Conversely, if the traffic overload is relieved of the assigned specific DU by increasing the bandwidth, the controller 240 reduces the bandwidth to its original level.

Third, if the data to be accessed via the second EPC 260 is a data center (not shown) for a specific purpose, the controller 240 controls the leased line to quickly connect to the data sensor .

That is, the controller 240 designs and configures an independent path in the backhaul network as to which terminal should be connected to which EPC. For example, if the first EPC 250 as a common EPC and the second EPC as a private EPC are installed and terminals to be accommodated for each EPC are determined, You only need to configure it once. However, in the actual operation, the controller 240 needs to change and control the path through which the packet flow is to be transmitted in real time because the path is continuously changed according to the state of the network as well as the initial configuration.

In the embodiment of the present invention, the function of the controller 240 to automatically set the path so that the switch 230 can route the packet flow according to the destination of the packet, which is the first function, will be described. The function for the second control and the function for the third control can be freely selected according to the system design or can be performed differently according to the control method. Therefore, the present invention is not limited to any one method.

In this circumstance, the structure of the controller 240, which is implemented in SDN and sets the path for transmission to the first EPC 250 or the second EPC 260 according to the destination of the packet, is described with reference to FIG. 6 .

6 is a structural diagram of a controller according to an embodiment of the present invention.

6, the controller 240 includes a network control unit 241, a service control unit 242, an interface 243, and a storage unit 244.

Upon receiving the template automatically generated by the service control unit 242 for the new service customer, the network control unit 241 calculates a route for providing the specific service to the new service customer based on the template. Here, the path means a path from the switch 230 to the EPC allocated to the new service customer. The structure of the network control unit 241 will be described first with reference to FIG.

7 is a structural diagram of a network control unit according to an embodiment of the present invention.

As shown in FIG. 7, the network control unit 241 includes a path design module 241-1, a topology management module 241-2, a configuration module, and a packet control module 241-6.

Upon receiving the template from the service control unit 242, the path design module 241-1 activates the topology management module 241-2 to receive the device information and the network connection information stored in the storage unit 244 . Here, the equipment information and the network connection information may include unique information (e.g., equipment manufacturer, use interface, etc.) for a plurality of equipment located in the backhaul from the switch 230 to the EPC, it means.

As described above with reference to FIG. 2, packets can be moved from the switch 230 to the EPC over different transmission systems, so that equipment and connection information for all layers are received. Upon receiving the equipment information and the network connection information from the topology management module 241-2, the path design module 241-1 calculates at least one path based on the template.

Then, the path design module 241-1 transfers the calculated path to the configuration module by including it in the template. Here, the method of calculating the route based on the template, the equipment information, and the network connection information can be performed by various methods, and thus is not limited to any one of the methods of the present invention.

When the path design module 241-1 receives the template from the service control unit 242, the topology management module 241-2 receives the device information and the network connection information stored in the storage unit 244. Then, it transmits the received equipment information and network connection information to the path design module 241-1.

The configuration module for determining or verifying the final path in at least one path designed by the path designing module 241-1 includes an equipment specific setting module 241-3, a verification module 241-4, and an equipment specific interface module 241 -5).

The per-device setting module 241-3 receives a template including at least one path designed by the path design module 241-1. In addition, it is determined which route will be determined as the final route considering at least one route in the template, equipment and equipment model located on the route, and packet processing margin capacity that can be processed by each device.

This is because, when making a dedicated line for a new user or a user already using the service, the devices on the network can be connected to the devices of different companies. If the model of the equipment in the designed path is a different company, the configuration command and the configuration rule are different from each other, and thus the actual configuration procedure, the command input order to the equipment, Everything changes depending on the situation.

Therefore, the device-specific setting module 241-3 creates a configuration set for each of at least one or more paths. The configuration set contains information about the devices on the network path through which the packet will travel.

For example, if a user wants a speed of 100 Mbps, if the user's requirements are not satisfied through the existing path, a separate path must be created to provide a speed of 100 Mbps. At this time, when the equipment on the newly generated route is different from the model of the existing equipment, the configuration method and the instruction for executing the equipment are different from each other, but the instruction and the like are automatically inputted through the setting module for each equipment 241-3 It creates a set of settings, automatically generating what commands to put on what device and in what order.

The verification module 241-4 collects real-time information on the target devices before actually operating the devices on the network path based on the setting set of the device-specific setting module 241-3. This is to ensure that resource status and traffic conditions are collected from real network equipment just prior to operation and based on the information gathered, it is possible to provide the requirements required by the user when the network equipment is operated when it is executed.

The verification module 241-4 verifies each of the at least one configuration set and selects an optimal path that can provide the requested requirements by the user of the verified path. Here, the verification method based on the status information of the devices collected by the verification module 241-4 can be performed by various methods, so that detailed description will be omitted in the embodiment of the present invention.

The device-specific interface module 241-5 directly connects with the target devices on the verified path and calls an interface of devices located on the path selected in the optimal path through the interface 243 to control the device .

6, the service control unit 242 interfaces with a business support system (BSS: not shown) that provides a specific service (e.g., a B2B service) to the terminal. The business provision system is a system that creates new mobile B2B services using a platform such as B2B Biz Portal and manages customer information through CRM (Customer Relationship Management). Here, the components of the business providing system and the method of generating the service can be performed by various methods, so that the detailed description will be omitted in the embodiment of the present invention.

Upon receipt of the dedicated line configuration request signal from the business provisioning system, the service control unit 242 automatically generates network configuration information as a template for the service to which the customer subscribes based on the service profile management function, . Here, the template includes network configuration information.

That is, in order to provide a network configuration necessary for a customer to provide a service product subscribed through a business provision system, a network operator manually inputs and transmits network configuration information by hand. In order to prevent an error such as an input of network configuration information from being generated in this process, in the embodiment of the present invention, the service control unit 242 transmits a service profile (for example, , Equipment, procedures, etc. necessary for network configuration based on the service product, subscription period, service opening time, exclusive EPC, service coverage information, number of opened terminals, dedicated service, additional service, QoS, terminal type, (E. G., EPC information, coverage information, QoS information, and the like) that is information of the mobile station 100 as a template.

The interface 243 links the network control unit 241 with a plurality of equipment (for example, IP equipment, transmission equipment, etc.) located in the backhaul. To this end, the interface 243 is defined such that the switch 230 is interlocked with the IP equipment in the backbone. The transmission equipment includes a Multi-Service Provisioning Platform (MSPP), a Packet Transport Network (PTN), an Optical Transport Network (OTN), and a Packet Optical Transport Network (POTN). The network construction method for interworking with the IP equipment or the transmission equipment can be performed by various methods, and therefore, the present invention is not limited to any one method.

At this time, the interface 243 has all of the interface types for interlocking with the equipment to which the network control unit 241 is to be linked. The driver is an API type for the interworking standard for communicating with equipment to be controlled by the network control unit 241. In general, the driver is used by customizing the API provided by the equipment manufacturer to the control unit of the communication company .

The storage unit 244 stores device information and network connection information for a plurality of devices located in the backhaul. When the network control unit 241 calculates a route to form a dedicated line for the user, it provides stored equipment information and network connection information.

The flow of the above-described dedicated line configuration system 200 constituting a dedicated line for a new customer will be described with reference to FIG.

8 is a flowchart of a dedicated line configuration method according to an embodiment of the present invention.

As shown in FIG. 8, the dedicated line configuration system 200 receives a line configuration request signal for a new customer from an interworking business provision system (not shown) (SlOO). Herein, the circuit configuration request signal may include at least one of the identification information of the new customer, the service information of the subscriber, the service period, the number of the opened terminals of the customer, the terminal type to be used, QoS, A combination with a line or a cloud service, etc.).

In the embodiment of the present invention, the line connection to the new customer is described as an example, but the line configuration request signal may be received when the network status is changed or the service request by the customer is changed.

Upon receiving the line configuration request signal, the dedicated line configuration system 200 first generates a template based on the information included in the line configuration request signal. When the template is generated, it is generated so that the customer identification information, the product category identification information to which the customer subscribes, and the service information are included. That is, through the template, the dedicated line configuration system 200 can identify the components necessary for connection to the switch 230, the S-GW, the P-GW, the customer dedicated line, and the client server. Here, the service information includes essential information such as EPC information, coverage information, QoS information, and optional service information such as combined service information.

Then, it confirms information about all equipment of the backhaul section and network connection information stored in advance. The backhaul interval refers to a period from the switch 230 to the EPC. The backhaul interval includes all the devices installed in various network layers such as the transmission interval from the switch 230 to the EPC or the IP interval, network connection information according to the devices, Are included in the device information and network connection information.

The dedicated line configuration system 200 calculates a path of a line to a new customer based on the service subscription information received in step S100 and the generated template (S110). Conventionally, a line setup order is transmitted to the network operator so that the network operator manually sets the line path. In contrast, in the embodiment of the present invention, the dedicated line configuration system 200 automatically routes the line Create. Since the circuit path method can be performed by various methods, the present invention is not limited to any one method.

The path calculation step of step S110 will be described in detail. The dedicated line configuration system 200 calculates at least one route to the template based on the automatically generated template, pre-stored device information, and network connection information. A configuration set is configured to determine the final path among at least one or more paths. Based on the set of settings, it collects the status information of the currently running target devices and verifies the optimal set of settings that can provide the requirements requested by the user. And selects one set of at least one configuration set through the verification procedure.

When the path is calculated based on the template in step S110, the dedicated line configuration system 200 calls the interface of each device located on the path (S120). Then, the dedicated line configuration system 200 through the called interface establishes a line through which a new user is to be provided, in cooperation with each device (S130).

In this embodiment of the present invention, since the network is branched from the backhaul section, the service can be provided by the QoS or SLA according to the request of the user. This will be described with reference to FIG. 9 in comparison with a general network.

FIG. 9 is an exemplary diagram illustrating a network classification in an existing network and in a network according to an embodiment of the present invention.

FIG. 9A shows only the core equipment in the existing network, and FIG. 8B shows an example in which the network is separated from the backhaul in the network according to the embodiment of the present invention.

As shown in FIG. 9 (a), in the existing network, only the IP of the exchange to which the terminal should connect is fixed, and the terminal is divided and received before the final EPC so that the terminal is classified and received. In this case, the network is exposed to overload because it uses a line like external traffic, and there is a problem that a customer who desires a personal service can not satisfy the demand for high QoS or an SLA such as a delay.

Therefore, when the network according to the embodiment of the present invention is applied as shown in FIG. 9 (b), the network can be branched from the backhaul section to provide a service with separate QoS and SLA. Therefore, for network operators, it is possible to differentiate user quality and enhance business competitiveness.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (12)

In a dedicated line configuration system implemented with SDN (Software Definition Network)
A service controller for generating a network configuration information as a template using a leased line configuration request signal including information on the specific service and information on the customer to generate a packet transmission path to a customer subscribed to the specific service;
A network controller for generating the packet transmission path based on device information and network connection information stored in advance for a backhaul section from a switch to which a plurality of DUs are connected to an EPC dedicated to a customer, and the generated template; And
An interface for calling an interface of a plurality of devices on a packet transmission path according to a packet transmission path generated by the network control unit,
And a dedicated line configuration system. The method according to claim 1,
The controller comprising:
A storage unit for storing equipment information and network connection information for each of a plurality of equipments in the backhaul section,
And a dedicated line configuration system. 3. The method of claim 2,
The network control unit includes:
A topology management module for receiving a template from the service control unit and receiving equipment information and network connection information from the storage unit;
A path design module for calculating at least one packet transmission path for the backhaul section upon receiving the template, equipment information, and network connection information; And
A configuration module for verifying one or more packet transmission paths calculated by the path design module and selecting one packet transmission path and attempting to establish an interface connection with equipment on the selected packet transmission path,
And a dedicated line configuration system. The method of claim 3,
The configuration module comprising:
An equipment-specific setting module for generating one or more setting sets in consideration of an equipment model for the equipment on the at least one packet transmission path and a packet processing spare capacity of the equipment;
A verification module for collecting status information about target devices on the packet transmission path in real time for each of the generated configuration sets and selecting one path for the template among the one or more paths based on the collected status information; And
An interface module for each device that attempts to establish an interface connection by calling interfaces of the devices of the selected one packet transmission path;
And a dedicated line configuration system. The method according to claim 1,
Wherein the switch comprises:
The destination port is divided into a first packet or a second packet on the basis of destination IP information of a packet flowing into the switch, a packet divided into a first packet is routed to be transmitted to a common EPC, Wherein the packet is routed to be forwarded to the customer dedicated EPC. The method according to claim 1,
Wherein the template generated by the service control unit includes the identification information of the customer and the service identification information to which the customer subscribes,
Wherein the service identification information includes the EPC information dedicated to the customer, the QoS information, and the intra-coverage DU information. The method according to claim 6,
Wherein the template further comprises binding service information,
Wherein the service control unit receives the service profile from a business provision system managing a service profile for the customer and automatically generates a template. A method of configuring a leased line with a dedicated line configuration system implemented in SDN,
Receiving a line configuration request signal for a customer subscribed to a specific service from a business provision system managing the service;
It is possible to confirm all equipment information and network connection information installed in a backhaul section from a switch to which a plurality of DUs are connected to a customer-specific EPC or a common EPC to provide the specific service, Calculating; And
The interface of each equipment located on the calculated line path is called and a line of the backhaul section for the service to be provided by the customer is formed
To the dedicated line. 9. The method of claim 8,
Wherein the line configuration request signal includes service profile information for the customer,
Wherein the step of receiving the line configuration request signal comprises:
A step of automatically extracting the identification information of the customer and the service identification information to which the customer subscribes from the service profile information and automatically generating a template
To the dedicated line. 10. The method of claim 9,
Wherein the calculating the circuit path comprises:
Calculating at least one route to the template based on the generated template, all equipment information of a backhaul section stored in advance, and network connection information;
Constructing at least one set of settings based on at least one or more paths; And
Collecting status of the target devices, and selecting a path to one of the at least one configuration set as a circuit path
To the dedicated line. 11. The method of claim 10,
Wherein the circuit path of the backhaul section includes an IP section and a transmission section. 9. The method of claim 8,
After the step of constructing the circuit,
Identifying a destination port based on IP information of a packet received by a switch installed at a start point of the backhaul section and dividing the destination port into a first packet or a second packet;
Routing the packet at the backhaul starting point so that the packet separated by the first packet is forwarded to the common EPC; And
Routing the packet to be forwarded to the customer dedicated EPC
/ RTI >
Wherein the first packet is traffic for a general IP network and the second packet is traffic for providing a preset service to a customer.

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