KR20180012110A - Method for allocation and deallocation of IP address in Distributed Network System having Seperated Control Plane and User Plane - Google Patents

Abstract

The present invention relates to a method for operating a distributed network system. In a distributed network system where a control plane (CP) and a user plane (UP) are separated from each other, the CP is responsible for allocating and deallocating an IP address, and accordingly the UP performs efficient processing of traffic. When the control entities of the CP for controlling the entities of the UP are different from each other in a network where the entities of the UP are distributed while the entities of the CP are also distributable, control for a user′s IP address and traffic is managed. The method includes a step of storing information in a common database; and a step of performing a switch function for transferring traffic.

Description

[0001] The present invention relates to a method for allocating and releasing an IP address in a distributed network system in which a control plane and a data plane are separated from each other,

The present invention relates to a method for assigning and releasing user IP addresses in a network having characteristics of a distributed network for efficient processing of users' traffic, and more particularly, , a control plane, and a UP (data plane, user plane) are distinguished from each other, and a method for allocating and releasing an IP address in the operation of a distributed network system.

In the Software Defined Network (SDN), the control plane (CP) and the UP (user plane) are separated from each other to control the CP. In the UP, the communication traffic is controlled according to the control of the CP do. UP is hardware based, and only the data transfer function. The control function of the switch is separated by CP and managed by software, so that the network can be efficiently managed and operated.

As a way to reduce the load on the network as the user's traffic continues to increase, a method for handling user traffic at the edge near the user's access point is being studied, and this technique is in the form of a distributed network .

Although a conventional LTE (Long Term Evolution) network expresses separation of CP and UP, a large part of the CP function is mixed with the UP in terms of SDN. In particular, PGW (PDN Gateway) that assigns and releases IP (Internet Protocol) addresses is a functional entity that is not distinguished between CP and UP. In addition, in the conventional LTE network, the PGW, which is an apparatus for IP address routing, allocates an IP address in a centralized manner, thereby causing a problem that the path of communication traffic is concentrated at the center.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a distributed network system in which a CP (control plane) and an UP A control entity of a control plane (CP), which controls the entities of the UP in the network in which UPs perform efficient processing of traffic, and UP entities are dispersed And managing the control of the IP address and traffic of the user between them if they are different from each other.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

According to another aspect of the present invention, there is provided a method of operating a distributed network system by separating a control plane and a data plane according to an aspect of the present invention includes: Assigning and releasing an IP (Internet Protocol) address to the user terminal according to information on the user terminal and updating and storing the information in the common database; And an entity of a data plane receiving control of an entity of the control plane and supporting a user terminal to connect to a wired and wireless integrated core network for a plurality of communication schemes, And performing a switch function for transferring data traffic between the user terminal and the counterpart node based on the IP address.

In the method of operating the distributed network system, an entity of a plurality of control planes and an entity of a plurality of data planes are interacted with each other in a relationship of 1: 1, 1: N, N: M (N and M are natural numbers) Interface.

In a method of operating a distributed network system, entities of a plurality of control planes refer to the common database, wherein entities of a plurality of data planes are configured to perform routing, tunneling, buffering And a switch function for transferring the data traffic.

Wherein when the user terminal accesses an entity of a first data plane of an entity of the data plane and then accesses an entity of a second data plane, Determining the movement of the user terminal and requesting the entity of the second control plane to perform processing of control associated with the IP address of the user terminal, in an entity of a first control plane managing the user terminal; And controlling, in an entity of the second control plane that manages an entity of the second data plane, switch control associated with the IP address of the user terminal to occur in the second data plane. After the requesting step, an entity of the first control plane or an entity of the second control plane sends a message indicating that processing of control associated with the IP address of the user terminal is to be performed by an entity of the second control plane , To an entity of the first data plane.

In order to pass control to the user terminal when the user terminal accesses an entity of a first data plane of the entity of the data plane and then accesses an entity of a second data plane, To the entity of the first control plane that manages the entity of the first data plane in the entity of the second control plane managing the entity of the first data plane by determining the movement of the user terminal and proceeding with the process of control related to the IP address of the user terminal Notifying; And controlling, at an entity of the second control plane, a switch control associated with an IP address of the user terminal to occur in the second data plane. After the requesting step, an entity of the first control plane or an entity of the second control plane sends a message indicating that processing of control associated with the IP address of the user terminal is to be performed by an entity of the second control plane , To an entity of the first data plane.

A distributed network system for separating and operating a control plane and a data plane according to another aspect of the present invention allocates and releases an IP (Internet Protocol) address to the user terminal according to information on connection of the user terminal An entity of a control plane that updates and stores the information in a common database; And an entity of a data plane that is under the control of an entity of the control plane and supports a user terminal to connect to a wired / wireless integrated core network for a plurality of communication schemes, wherein the entity of the data plane comprises: Receives the IP address allocated to the user terminal, and performs a switch function for transferring data traffic between the user terminal and the counterpart node based on the IP address.

In the distributed network system, an interactive interface is used between entities of a plurality of control planes and entities of a plurality of data planes in a relationship of 1: 1, 1: N, and N: M (N and M are natural numbers).

In the distributed network system, entities of a plurality of control planes refer to the common database, and entities of a plurality of data planes are connected to a plurality of entities in the plurality of control plane entities by routing, tunneling, and buffering the IP address assigned to the user terminal. And controls a switch function for transferring the data traffic.

Wherein when the user terminal accesses an entity of a first data plane of an entity of the data plane and then accesses an entity of a second data plane, Wherein the controller is configured to request the entity of the second control plane to perform processing of control associated with the IP address of the user terminal by determining the movement of the user terminal in the entity of the first control plane managing the entity of the second data plane, In an entity of the second control plane, switch control associated with the IP address of the user terminal is performed in the second data plane. The entity of the first control plane or the entity of the second control plane may request the entity of the second control plane to request the entity of the first control plane A message indicating that processing of control associated with the IP address of the terminal is to be performed by the entity of the second control plane may be transmitted to the entity of the first data plane.

In order to pass control to the user terminal when the user terminal accesses an entity of a first data plane of the entity of the data plane and then accesses an entity of a second data plane, To the entity of the first control plane that manages the entity of the first data plane in the entity of the second control plane managing the entity of the first data plane by determining the movement of the user terminal and proceeding with the process of control related to the IP address of the user terminal And controls, in an entity of the second control plane, switch control associated with the IP address of the user terminal to be performed in the second data plane. The entity of the first control plane or the entity of the second control plane sends a request to the entity of the first control plane to request the entity of the second control plane to request the entity of the first control plane, A message indicating that processing of control associated with the IP address of the terminal is to be performed by the entity of the second control plane may be transmitted to the entity of the first data plane.

According to the operation method of the distributed network system in which the CP (control plane) and the UP (data plane) are separated from each other according to the present invention, entities of UP can be classified into entities of UP in a distributed network If the control entities of the controlling CP are different from each other, the control authority of the IP address and the traffic of the user is managed between them, so that the functional entity processing data such as the conventional PGW (PDN Gateway) Address assignment, and routing, thereby effectively solving the problem of centralized routing of communication traffic.

In addition, in the case of assigning an IP address at the edge of the network close to the user's location, not only the routing path of the user data can be reduced, but also the management of the IP address by the control entity of the CP It is possible to efficiently process the user traffic.

1 is a diagram for explaining a structure of an LTE network which is a general centralized type network.
FIG. 2 is a diagram for explaining a problem on a data traffic path in the LTE network of FIG. 1; FIG.
3 is a diagram for explaining a distributed network system according to an embodiment of the present invention.
4A is an example of the flow of data when the user terminal UE1 communicates with the correspondent node CN1 in the distributed network system of Fig.
4B is an example of a flow of data when communicating with a node CN1 and a new node CN2 before movement in a case where a user terminal moves from UE1 to UE2 in the distributed network system of FIG.
FIG. 5 is a view showing a core network of the distributed network system of FIG. 3 in terms of a control plane and a data plane.
FIG. 6A is an example for explaining a control processing relationship between eUCEs and CGWs in the movement of a UE in the distributed network system of FIG. 3. FIG.
6B is another example for explaining the control processing relationship between the eUCEs and the CGWs in the movement of the UE in the distributed network system of Fig.
6C is another example for explaining the control processing relationship between the eUCEs and the CGWs in the movement of the UE in the distributed network system of Fig.
FIG. 6D is another example for explaining the control processing relationship between the eUCEs and the CGWs in the movement of the UE in the distributed network system of FIG. 3. FIG.
FIG. 7 is a diagram for explaining sharing of information managed by the eUCE in the distributed network system of FIG. 3. FIG.
FIG. 8A is a flowchart for explaining a procedure in which the eUCE assigns an IP address to a connection of a UE in the distributed network system of FIG. 3. FIG.
8B is a flowchart for explaining a procedure in which the eUCE in the distributed network system of FIG. 3 releases the IP address for the disconnection of the UE.
FIG. 9A is an example of a configuration procedure for traffic processing for a corresponding IP address by receiving IP address allocation information from the eUCE in the distributed network system of FIG. 3.
FIG. 9B illustrates an example in which the CGW, the BS, and the like receive the release information of the IP address allocation from the eUCE in the distributed network system of FIG. 3 and release procedures for the IP address.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

1 is a diagram for explaining a structure of an LTE network which is a general centralized type network.

Referring to FIG. 1, each evolved Node B (eNB) connects a UE (User Equipment) to a core network, which is a wired network, through a wireless interface. The Serving Gateway (SGW) of the core network plays an anchor role for the handover between eNBs of the UE, and the PGW (PDN Gateway) plays an anchoring role for the SGW handover between the UEs. In particular, the PGW assigns an IP address to the UE. The MME (Mobility Management Enity) manages the mobility of the UE and manages the Evolved Packet Service (EPS) bearer.

FIG. 2 is a diagram for explaining a problem on a data traffic path in the LTE network of FIG. 1; FIG.

As shown in FIG. 2, by allocating the IP addresses of the UEs (UE1 to UE4) in the PGW, communication between UE1 and UE2, communication between UE1 and UE3, and communication paths between UE1 and UE4 must go through PGW. This problem occurs because the PGW is the entity that assigns IP and is the entity responsible for routing user traffic. Since the traffic (data) is transmitted through the IP tunneling from the eNB to the PGW, the PGW handles the routing of the traffic of the UEs (UE1 to UE4).

In order to solve such problems, a method for allocating and releasing IP addresses in a distributed network system in which a control plane and a data plane are separated according to an embodiment of the present invention is proposed.

3 is a diagram for explaining a distributed network system 100 according to an embodiment of the present invention.

3, a distributed network system 100 according to an exemplary embodiment of the present invention includes at least one Universal Control Entity (UCE), at least one edge UCE (edge integrated control entity) eUCE1, eUCE2), one or more Converged GateWay (CGW) (e.g., CGW1 to CGW4), and the like. The wired / wireless integrated core network may further include a server or an apparatus necessary for system operation such as an HSS (Home Subscriber Server) for managing subscriber information.

Each UE includes a wireless fidelity (BS) base station (e.g., an access point supporting IEEE 802.11 series wireless access technology), a Fixed SW (switch) supporting wired connection technology (5G) BS that supports connection technology (eg, 5G wireless access technology) that incorporates future license-exempt bands and licensed bands (eg, L3 switch supporting wired IP access technology) It is possible to access the CGW at the corresponding location and use the wired / wireless integrated core network. The CGW relays the UEs with multiple communication methods (eg, 5G, WiFi, Fixed, etc.) to the wired / wireless integrated core network.

In the figure, each UE is connected to the wired / wireless integrated core network through 5G BS, WiFi BS, Fixed SW, and CGW, but each UE can directly access eUCE from 5GBS, WiFi BS and Fixed SW.

Although the distributed network system 100 of the present invention supports an access technology such as 5G, WiFi, Fixed (wired connection) and the like, the distributed network system 100 of the present invention can be applied to 3G, 4G, etc. The present invention is also applicable to various wireless connection technologies of the present invention.

The user terminal UE is a terminal supporting one or more access technologies including 5G among 5G / WiFi / Fixed access networks. That is, the user terminal UE may be a device that is individually implemented for one or more of these various access technologies, or a device that is implemented in the form of integrating these various access technologies.

The CGW is an entity responsible for routing traffic of the user terminal UE. The 5G BS, the WiFi BS, the Fixed SW, and the CGW are tunneled through the IP (Internet Protocol) tunnel. CGW is responsible for data processing in integrated wired and wireless core networks, UCE is responsible for controlling CGWs / eUCEs in the core network, and HSS for storing and managing subscriber information. Also, UCE supports mobility between eUCEs, and UCE / eUCE can control allocation and release of IP addresses to UEs. Compared to 3GPP LTE, CGW is similar to SGW and PGW, and UCE is similar to MME.

4A is an example of the flow of data when the user terminal UE1 communicates with the counterpart CN1 in the distributed network system 100 of FIG. FIG. 4B is an example of a flow of data when communicating with a node CN1 and a new node CN2 before movement in a case where a user terminal moves from UE1 to UE2 in the distributed network system 100 of FIG.

4A, when the user terminal UE1 communicates with the counterpart node CN1 via 5G among various connection methods such as 5G, WiFi, Fixed (wired connection), for example, the user terminal UE1 receives the service from the eUCE1 to the CGW1 IP1 address in the range of IP address can be allocated and used.

When the user terminal moves from the location of the UE 1 to the UE 2, as shown in FIG. 4B, the previous CGW 1 is a CGW 2 managing the connection of the user terminal UE 2 by using a tunnel or the like, And CGW2 also services the address IP1 of UE1, which is a range of IP addresses that it does not service. The eUCE 2 that controls the CGW 2 assigns a new address IP 2 in the range of the IP address served by the CGW 2 to the UE 2 so that the UE 2 can perform new communication with another node CN 2 on the network in a different access method such as WiFi, .

FIG. 5 is a view showing the core network of the distributed network system 100 of FIG. 3 in terms of a control plane and a data plane.

First, in the LTE structure of FIG. 1, the MME takes charge of various kinds of control, and the PGW and the SGW take charge of data, so that the control plane and the data plane are separated as if the PGW and the SGW have control portions of the gateway function Therefore, the control plane and the data plane are not completely separated from each other.

On the other hand, in the present invention, CGWs are entities for controlling in the control plane as eUCEs / UCEs and processing data in the data plane. Interactive interfaces can be formed between eUCE and CGW with 1: 1, 1: N, and N: M (N and M are natural numbers). In the present invention, the eUCEs (1 to n) each interface with one or more of the CGWs (1 to m) of the data plane. Each eUCE sends the control information to the CGW to perform necessary control. The eUCE is responsible for the overall control and provides the CGW with information related to the switch control of the CGW. Specifically, each eUCE allocates and releases an IP address to the UE (s) connected to the corresponding CGW. The CGW receives various control information from the eUCE and takes charge of a switch function for transferring user data traffic. The CGW performs various processes necessary for transferring user data traffic on the data plane. In particular, CGW performs routing and tunneling processing of user traffic, and processes it according to detailed information including 5-tuple including IP address. 5-tuple is source IP address / port number, destination IP address / port number, and protocol information. The dual IP address contains the IP address of the UE assigned by the eUCE.

6A to 6D are examples for explaining the control processing relationship between the eUCEs and the CGWs in the movement of the UE in the distributed network system 100 of Fig.

When the user terminal UE is allocated an IP address from the eUCE 1 and accesses the CGW 1 and then moves to the CGW 2 (see FIG. 4B), the control right can be given to the eUCE 2 managing the CGW 2 in the same manner as in FIGS. 6A to 6D.

First, as shown in FIG. 6A, the eUCE 1, which has determined that the user terminal UE has moved to the CGW 2, requests the eUCE 2 (IP Manager Change Req., IP manager change request) for control processing related to the IP address preliminarily assigned to the UE 611). In response to this, the eUCE2 transmits a corresponding response (IP Manager Change Resp.) To the eUCE1 (612). Also, the eUCE 1 transmits a message (Control Change Req.) To the CGW 1 that the eUCE 2 will instruct the processing of the control associated with the IP address pre-assigned to the UE (613). In response to this, the CGW1 transmits a corresponding response (Control Change Resp.) To the eUCE1 (614). The eUCE2 then forwards the switch control associated with the pre-assigned IP address processing to the CGW2 615 and the CGW2 responds 616 to it. Thereafter, continuous service can be provided to the user terminal UE through the CGW2 under the control of the eUCE2.

Also, as shown in FIG. 6B, a method of notifying the CGW1 that the eUCE2 will instruct the processing of the control related to the IP address pre-assigned to the UE can be used. That is, the eUCE 1 judging that the user terminal UE has moved to the CGW 2 requests the eUCE 2 (IP Manager Change Req., IP manager change request) (621) to control processing related to the IP address preliminarily assigned to the UE. In response to this, the eUCE2 transmits a corresponding response (IP Manager Change Resp.) To the eUCE1 (622). In addition, the eUCE2 transmits a message (Control Change Req.) To the CGW1 indicating that it will instruct the processing of the control related to the IP address pre-assigned to the UE (623). In response, the CGW1 transmits a corresponding response (Control Change Resp.) To the eUCE2 (624). The eUCE2 then forwards the switch control associated with the pre-assigned IP address processing to the CGW2 (625) and the CGW2 responds (626). Thereafter, continuous service can be provided to the user terminal UE through the CGW2 under the control of the eUCE2.

6C and 6D show a method of informing the eUCE 2 that the eUCE 2 judging that the user terminal UE has moved to the CGW 2 and connected thereto will be in charge of processing of control related to the IP address pre-assigned to the UE.

6C, the eUCE 2 judging that the user terminal UE has moved to the CGW 2 requests the eUCE 1 (IP Manager Change Req., IP manager change request) to take charge of processing of control related to the IP address pre- Through the message (631). In response to this, the eUCE1 transmits a response (IP Manager Change Resp.) To the eUCE2 (632). Also, the eUCE1 transmits a message (Control Change Req.) To the CGW1 that the eUCE2 will instruct the process of the control related to the IP address pre-assigned to the UE (633). In response to this, the CGW1 transmits a corresponding response (Control Change Resp.) To the eUCE1 (634). The eUCE2 then forwards the switch control associated with the pre-assigned IP address processing to the CGW2 (635) and the CGW2 responds (636). Thereafter, continuous service can be provided to the user terminal UE through the CGW2 under the control of the eUCE2.

6D, the eUCE 2 judging that the user terminal UE has moved to the CGW 2 requests the eUCE 1 (IP Manager Change Req., IP manager change request) to take charge of control processing related to the IP address pre- Message (641). In response to this, the eUCE 1 transmits a response (IP Manager Change Resp.) To the eUCE 2 (642). Also, the eUCE2 transmits a message (Control Change Req.) To the CGW1 indicating that it will instruct the processing of the control related to the IP address pre-assigned to the UE (643). In response to this, the CGW1 transmits a corresponding response (Control Change Resp.) To the eUCE2 (644). The eUCE2 then forwards the switch control associated with the pre-assigned IP address processing to the CGW2 (645) and the CGW2 responds (646). The CGW 2 under the control of the eUCE 2 instructs the CGW 1 about routing, tunneling, and buffering of the corresponding IP address, thereby enabling continuous service to the user terminal UE moving to the CGW 2.

FIG. 7 is a diagram for explaining sharing of information managed by the eUCE in the distributed network system 100 of FIG.

The wired / wireless integrated core network of the present invention includes a database 710 for storing user context information, a database 710 for storing authentication information such as AAA (Authentication, Authorization, Accounting), mobility, and a DB 720 for storing user profile information such as a service of the user. In the user context information DB 710, IP address information of each UE is stored and managed as information for supporting connectivity including user mobility. In the user profile information DB 720, a profile related to the subscriber information acquired by the eUCE from the HSS according to the user connection is stored and managed.

Each eUCE may update the User context information or the User Profile information of the DBs 710 and 720, and the updated DBs 710 and 720 may be referred to by other eUCEs. That is, a plurality of eUCEs may share User Context information or User Profile information managed by the eUCEs in the DBs 710 and 720, so that the CGWs can appropriately control the switch function to support data traffic delivery.

8A is a flowchart for explaining a procedure in which an eUCE assigns an IP address to a connection of a UE in the distributed network system 100 of FIG. 8B is a flowchart for explaining a procedure in which the eUCE releases the IP address for the disconnection of the UE in the distributed network system 100 of FIG.

8A, when the UE accesses 810 through a base station, an access point, a switch, or the like (hereinafter referred to as a base station) of a connection technology such as 5G, WiFi, Fixed or the like (811) and assigns an IP address to the UE (812). The information about the connection through the base station of the UE can be received by the eUCE from the core network by a NAS (Non Access Stratum) message. The IP assigned to the UE by the eUCE belongs to the category of the IP address that can be processed by the CGW in which the UE exists. The eUCE provides the allocated IP address to the CGW and the base station (813), and updates the corresponding address in the User Context information DB (710) storing information on the IP address allocation for each user terminal (814). Conventionally, the PGW allocates and stores the IP addresses of the corresponding user terminals. However, in the related art, it is impossible to select a flexible path for the user's mobility.

8B, when the UE disconnects the connection through the base station or the like (820), the eUCE receives the predetermined information about the disconnection of the UE through the base station, determines the number of times of the IP address of the corresponding UE, And provides the collected information to the CGW and the base station (821). The eUCE deletes the IP address of the UE thus retrieved from the user context information DB 710 (822). The billing information of the IP address can be managed in a separate DB (823).

FIG. 9A is an example of a configuration procedure for traffic processing for a corresponding CGW and a base station in the distributed network system 100 of FIG. 3 receiving IP address allocation information from an eUCE. FIG. 9B illustrates an example in which the CGW, the BS, and the like in the distributed network system 100 of FIG. 3 receive the release information of the IP address allocation from the eUCE and release procedures for the IP address.

First, in FIG. 9A, the eUCE may transmit the IP address allocation information to the CGW and the base station to notify the CGW that the IP address for the UE has been allocated (910). Accordingly, the CGW and the base station set the routing table 911, the tunneling table 912, and the downlink buffering 913 information for the IP address allocation, respectively, It is possible to support a switch function for transferring user data traffic such as traffic routing, tunneling, buffering to an address. These 911 to 913 can change the order.

Similarly, in FIG. 9B, the eUCE may transmit the IP address retrieval information to the CGW and the base station, which informs the CGW that the IP address of the UE has been retrieved (released) (920). Accordingly, the CGW and the base station update (unset) the routing table 921, the tunneling table 922, and the downlink buffering 923 information for the IP address retrieval, respectively , The switch function for transmitting user data traffic such as routing, tunneling, buffering, etc. to the corresponding IP address of the UE can be stopped. These 921 to 923 can change the order.

As described above, the CGW and the base station can perform the corresponding setting or deactivation in the order of the routing table, the tunneling table, and the downlink buffering information, respectively, in response to the request of the eUCE. However, in some cases, when the eUCE assigns an IP address to the UE, it may request the CGW and the base station to separately set routing tables, tunneling tables, and downlink buffering information. The eUCE may also request to unconfigure each of the above information.

On the other hand, downlink buffering can be handled by either a CGW or a base station (a base station, an access point or a switch of a connection technology such as 5G, WiFi, and Fixed), or both. The configuration of a routing table at a base station or the like includes a setting for delivery at the link layer to match the link characteristics of the access network.

As described above, in the operation of the distributed network system 100 in which the CP (control plane) and UP (data plane) are separated from each other according to the present invention, the entity of the UP is distributed to the network (PDN Gateway), by controlling the control of the user's IP address and traffic between the control entities of the control plane (CP) controlling entities of the UP The functional entity that handles the assignment of IP addresses in a centralized manner and takes charge of the routing, effectively solving the problem that the path of the communication traffic is centered. In addition, in the case of assigning an IP address at the edge of the network close to the user's location, not only the routing path of the user data can be reduced, but also the management of the IP address by the control entity of the CP It is possible to efficiently process the user traffic.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

In the distributed network system 100,
UCE (Universal control entity)
eUCE (edge UCE)
Converged GateWay (CGW)
WiFi (Wireless Fidelity) BS (base station)
Fixed SW (switch)
5G (5generation) BS
The user terminal (UE)

Claims (14)

A method for operating a distributed network system by separating a control plane and a data plane,
Allocating and releasing an IP (Internet Protocol) address to the user terminal according to information on connection of the user terminal in the entity of the control plane, and updating and storing the information in the common database; And
Wherein the control plane entity is controlled by an entity of the control plane and supports a user terminal to connect to a wired / wireless integrated core network for a plurality of communication modes, wherein the entity of the control plane receives the IP address allocated to the user terminal And performing a switch function for transferring data traffic between the user terminal and the counterpart node based on the IP address
The method comprising the steps of: The method according to claim 1,
A method of operating a distributed network system using an interactive interface in a relationship of 1: 1, 1: N, and N: M (N and M are natural numbers) between entities of a plurality of control planes and entities of a plurality of data planes . The method according to claim 1,
In entities of a plurality of control planes, entities of a plurality of data planes refer to the common database to communicate the data traffic, including routing, tunneling, and buffering, to the IP address assigned to the user terminal A method for operating a distributed network system that controls to support switch functions. The method according to claim 1,
Wherein when the user terminal accesses an entity of a first data plane among entities of the data plane and then accesses an entity of a second data plane,
Determining a movement of the user terminal in an entity of a first control plane that manages an entity of the first data plane, and requesting an entity of a second control plane to perform processing of control associated with the IP address of the user terminal; And
Controlling, in an entity of the second control plane that manages an entity of the second data plane, switch control associated with the IP address of the user terminal to occur in the second data plane
The method comprising the steps of: 5. The method of claim 4,
After the requesting step,
Wherein an entity of the first control plane or an entity of the second control plane sends a message indicating that processing of control associated with the IP address of the user terminal is to be performed by an entity of the second control plane, ≪ / RTI >
Further comprising the steps of: The method according to claim 1,
Wherein when the user terminal accesses an entity of a first data plane among entities of the data plane and then accesses an entity of a second data plane,
Managing an entity of the first data plane that the entity of the second control plane managing entity of the second data plane is to proceed with processing of control related to the IP address of the user terminal by determining movement of the user terminal Notifying an entity of a first control plane; And
Controlling, in an entity of the second control plane, switch control associated with an IP address of the user terminal to occur in the second data plane
The method comprising the steps of: The method according to claim 6,
After the requesting step,
Wherein an entity of the first control plane or an entity of the second control plane sends a message indicating that processing of control associated with the IP address of the user terminal is to be performed by an entity of the second control plane, ≪ / RTI >
Further comprising the steps of: A distributed network system for operating a control plane and a data plane separately,
An entity of a control plane for allocating and releasing an IP (Internet Protocol) address to the user terminal according to information on connection of the user terminal and updating and storing the information in the common database; And
A data plane entity that is under the control of the entity of the control plane and supports a user terminal to connect to a wired / wireless integrated core network for a plurality of communication schemes,
The entity of the data plane receives the IP address allocated to the user terminal from the entity of the control plane and performs a switch function for transferring data traffic between the user terminal and the counterpart node based on the IP address Distributed network system. 9. The method of claim 8,
A distributed network system using an interactive interface in a relationship of 1: 1, 1: N, and N: M (N and M are natural numbers) between entities of a plurality of control planes and entities of a plurality of data planes. 9. The method of claim 8,
In entities of a plurality of control planes, entities of a plurality of data planes refer to the common database to communicate the data traffic, including routing, tunneling, and buffering, to the IP address assigned to the user terminal A distributed network system that controls the switch function to support. 9. The method of claim 8,
Wherein when the user terminal accesses an entity of a first data plane among entities of the data plane and then accesses an entity of a second data plane,
Requesting an entity of a second control plane to control the process associated with the IP address of the user terminal by determining movement of the user terminal in an entity of a first control plane that manages an entity of the first data plane, 2 control entity in an entity of the second control plane that manages an entity of a second data plane such that switch control associated with the IP address of the user terminal occurs in the second data plane. 12. The method of claim 11,
After requesting an entity of the second control plane to process the control associated with the IP address of the user terminal in the entity of the first control plane,
Wherein an entity of the first control plane or an entity of the second control plane sends a message indicating that processing of control associated with the IP address of the user terminal is to be performed by an entity of the second control plane, To an entity of the distributed network system. 9. The method of claim 8,
Wherein when the user terminal accesses an entity of a first data plane among entities of the data plane and then accesses an entity of a second data plane,
Managing an entity of the first data plane that the entity of the second control plane managing entity of the second data plane is to proceed with processing of control related to the IP address of the user terminal by determining movement of the user terminal Notifies an entity of a first control plane and controls, at an entity of the second control plane, switch control associated with the IP address of the user terminal to occur in the second data plane. 14. The method of claim 13,
After requesting the entity of the first control plane to process the control associated with the IP address of the user terminal at the entity of the second control plane,
Wherein an entity of the first control plane or an entity of the second control plane sends a message indicating that processing of control associated with the IP address of the user terminal is to be performed by an entity of the second control plane, To an entity of the distributed network system.

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