KR102216712B1 - Method for allocation and deallocation of IP address in Distributed Network System having Seperated Control Plane and User Plane - Google Patents

Abstract

In the present invention, in a distributed network system in which CP (control plane) and UP (data plane) are separated, the CP is responsible for allocating and releasing IP addresses, and accordingly, the UP performs efficient processing of traffic, but the entity of the UP If the control entities of the CP (control plane) controlling the UP entities in the distributed network (CP entities can also be distributed) are different from each other, the user's IP address and control rights for traffic are managed between them. It relates to a method of operating a distributed network system.

Description

Method for allocation and deallocation of IP address in Distributed Network System having Seperated Control Plane and User Plane.

The present invention relates to a method for allocating and releasing user IP addresses in a network having a characteristic of a distributed network for efficient processing of users' traffic. In particular, a control plane (CP) like SDN (Software Defined Network) , control plane) and UP (data plane, user plane) are separated and related to a method for allocating and releasing IP addresses in the operation of a distributed network system having distinct characteristics.

In SDN (Software Defined Network), CP (Control Plane, Control Plane) and UP (User Plane, Data Plane) are classified, and the CP handles various controls, and the UP routes communication traffic according to the CP control. do. UP is in charge of only the data transmission function based on hardware, and the control function of the switch is separated by CP and managed in software, so that the network can be efficiently managed and operated.

As user traffic continues to increase, as part of a method to reduce the load on the network, a method for handling user traffic at the edge close to the location where the user is connected is being studied, and this technology appears in the form of a distributed network. .

Although the conventional LTE (Long Term Evolution) network advocates the separation of CP and UP, from the point of view of SDN, a significant part of CP functions are mixed with UP. In particular, PGW (PDN Gateway) that allocates and releases Internet Protocol (IP) addresses is a functional entity in which CP and UP are not separated. In addition, in the conventional LTE network, the PGW, which is a device in charge of IP address routing, allocates an IP address in a centralized manner, thereby concentrating the path of communication traffic to the center.

Accordingly, the present invention has been conceived to solve the above-described problem, and an object of the present invention is that the CP is responsible for IP address allocation and release in a distributed network system in which CP (control plane) and UP (data plane) are separated. Accordingly, the UP performs efficient processing of the traffic, but the control entity of the CP (control plane) that controls the UP entities in the network in which the UP entities are distributed (CP entities can also be distributed) If they are different, it is to provide a method of operating a distributed network system that manages the user's IP address and control rights for traffic between them.

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

First, summarizing the features of the present invention, 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 for achieving the above object is, in an entity of the control plane, access of a user terminal Allocating and releasing an IP (Internet Protocol) address for the user terminal according to the information on and updating and storing the corresponding information in a common database; And the IP address assigned to the user terminal from the control plane entity in the data plane entity that is controlled by the control plane entity and supports the user terminal to access the wired/wireless integrated core network for a plurality of communication methods. Receiving and performing a switch function for transmitting data traffic between the user terminal and a counter node based on the IP address.

In the method of operating the distributed network system, between entities of a plurality of control planes and entities of a plurality of data planes, interactive relationships of 1:1, 1:N, N:M (N, M are natural numbers) Use the interface.

In the method of operating the distributed network system, a plurality of control plane entities refer to the common database, and a plurality of data plane entities are routed, tunneled, and buffered for the IP address allocated to the user terminal. Including, control to support a switch function for transmitting the data traffic.

When the user terminal connects to the entity of the first data plane among the entities of the data plane and moves to access the entity of the second data plane, the entity of the first data plane is used to transfer control rights to the user terminal. Determining a movement of the user terminal at an entity of the first control plane that manages, and requesting the entity of the second control plane to process control related to the IP address of the user terminal; And controlling, in the entity of the second control plane that manages the entity of the second data plane, control of a switch related to the IP address of the user terminal to be performed in the second data plane. After the requesting step, the entity of the first control plane or the entity of the second control plane sends a message indicating that the processing of control related to the IP address of the user terminal is performed by the entity of the second control plane. And transmitting to the entity of the first data plane.

When the user terminal connects to the entity of the first data plane and then moves to access the entity of the second data plane among the entities of the data plane, in order to transfer control rights to the user terminal, the entity of the second data plane In the entity of the second control plane that manages the first control plane that determines the movement of the user terminal and processes the control related to the IP address of the user terminal, the entity of the first control plane manages the entity of the first data plane. Notifying; And controlling the entity of the second control plane to perform switch control related to the IP address of the user terminal in the second data plane. After the requesting step, the entity of the first control plane or the entity of the second control plane sends a message indicating that the processing of control related to the IP address of the user terminal is performed by the entity of the second control plane. And transmitting to the entity of the first data plane.

In addition, 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 the information on the connection of the user terminal. An entity on the control plane that updates and stores corresponding information in a common database; And a data plane entity that is controlled by an entity of the control plane and supports a user terminal to access a wired/wireless integrated core network for a plurality of communication methods, wherein the data plane entity is from the control plane entity. Receives the IP address assigned to the user terminal, and performs a switch function for transferring data traffic between the user terminal and a counter 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, N:M (N and M are natural numbers).

In the distributed network system, in a plurality of control plane entities, referencing the common database, a plurality of data plane entities, including routing, tunneling, and buffering for the IP address allocated to the user terminal, It controls to support a switch function for transmitting the data traffic.

When the user terminal connects to the entity of the first data plane among the entities of the data plane and moves to access the entity of the second data plane, the entity of the first data plane is used to transfer control rights to the user terminal. In the entity of the first control plane that manages, determines the movement of the user terminal, requests the entity of the second control plane to process control related to the IP address of the user terminal, and manages the entity of the second data plane. In the second control plane entity, control is performed so that switch control related to the IP address of the user terminal is performed in the second data plane. After the entity of the first control plane requests the entity of the second control plane to process control related to the IP address of the user terminal, the entity of the first control plane or the entity of the second control plane A message indicating that the control processing related to the IP address of the terminal is performed by the entity of the second control plane may be transmitted to the entity of the first data plane.

When the user terminal connects to the entity of the first data plane and then moves to access the entity of the second data plane among the entities of the data plane, in order to transfer control rights to the user terminal, the entity of the second data plane In the entity of the second control plane that manages the first control plane that determines the movement of the user terminal and processes the control related to the IP address of the user terminal, the entity of the first control plane manages the entity of the first data plane. It notifies and controls the entity of the second control plane to perform switch control related to the IP address of the user terminal in the second data plane. After the entity of the second control plane requests the entity of the first control plane to process control related to the IP address of the user terminal, the entity of the first control plane or the entity of the second control plane A message indicating that the control processing related to the IP address of the terminal is performed by the entity of the second control plane may be transmitted to the entity of the first data plane.

According to the method of operating a distributed network system in which the CP (control plane) and the UP (data plane) are separated according to the present invention, the entities of the UP are separated from the network in which the entities of the UP are distributed (the entity of the CP can also be distributed). If the control entities of the controlling CP are different, the IP address and the control right for the traffic are managed between them, so that IP is centralized in the functional entity that processes data like a conventional PGW (PDN Gateway). Address assignment and routing can effectively solve the problem of centralized communication traffic paths.

In addition, when IP addresses are allocated at the edge of the network close to the user's location, not only the routing path of user data can be reduced, but also the IP address management by the CP control entity for the movement of users. Through this, user traffic can be efficiently processed.

1 is a diagram for explaining the structure of an LTE network, which is a general centralized network.
FIG. 2 is a diagram for explaining a problem on a data traffic path in the LTE network of FIG. 1.
3 is a diagram illustrating a distributed network system according to an embodiment of the present invention.
4A is an example of a data flow when a user terminal UE1 communicates with a counter node CN1 in the distributed network system of FIG. 3.
FIG. 4B is an example of a data flow when a user terminal moves from a location of UE1 to UE2 in the distributed network system of FIG. 3 when communicating with a pre-moving node CN1 and a new node CN2.
FIG. 5 is a diagram illustrating a core network of the distributed network system of FIG. 3 in terms of a control plane and a data plane.
6A is an example for explaining a control processing relationship between eUCEs and CGWs when a UE moves in the distributed network system of FIG. 3.
6B is another example for explaining a control processing relationship between eUCEs and CGWs when a UE moves in the distributed network system of FIG. 3.
6C is another example for explaining a control processing relationship between eUCEs and CGWs when a UE moves in the distributed network system of FIG. 3.
6D is another example for explaining a control processing relationship between eUCEs and CGWs when a UE moves in the distributed network system of FIG. 3.
7 is a diagram for explaining sharing of information managed by eUCE in the distributed network system of FIG. 3.
8A is a flowchart illustrating a procedure for allocating an IP address for an access of a UE by eUCE in the distributed network system of FIG. 3.
FIG. 8B is a flowchart illustrating a procedure for eUCE to release an IP address for disconnection of a UE in the distributed network system of FIG. 3.
9A is an example of a configuration procedure for receiving IP address allocation information from eUCE by a CGW and a base station in the distributed network system of FIG. 3 and processing traffic for a corresponding IP address.
9B is an example of a CGW and a base station receiving release information of an IP address allocation from eUCE in the distributed network system of FIG. 3 and showing a release procedure for a corresponding IP address.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs an understanding of the embodiment of the present invention, a detailed description thereof will be omitted.

In describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, 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 the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

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

Referring to FIG. 1, each evolved Node B (eNB) connects a user equipment (UE) to a core network, which is a wired network, through a wireless interface. The Serving Gateway (SGW) of the core network plays an anchoring role for handover between the eNBs of the UE, and the PDN Gateway (PGW) plays an anchoring role of handover between SGWs of the UE. In particular, the PGW allocates an IP address to the UE. The Mobility Management Enity (MME) 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.

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

In order to solve this problem, hereinafter, 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 according to an embodiment of the present invention is proposed.

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

Referring to FIG. 3, a distributed network system 100 according to an embodiment of the present invention includes one or more UCEs (Universal Control Entities), one or more eUCEs (edge UCEs, edge integrated control entities) (eg, eUCE1, eUCE2), and one or more CGWs (Converged GateWay, Integrated Gateway) (eg, CGW1~CGW4). The wired/wireless integrated core network may further include a server or device necessary for system operation such as a Home Subscriber Server (HSS) that manages subscriber information.

Each UE has a WiFi (Wireless Fidelity) BS (base station) that supports the access technology of the unlicensed band (e.g., an access point supporting the IEEE 802.11 series wireless access technology), a fixed SW (switch) that supports the wired access technology ( Yes, through wired/wireless base stations or switches such as 5G (5generation) BS that supports access technology (e.g., 5G wireless access technology) incorporating unlicensed and licensed bands, etc. Wired/wireless integrated core network can be used by accessing the CGW at the location. CGW relays so that UEs using multiple communication methods (eg 5G, WiFi, Fixed, etc.) can access the wired/wireless integrated core network.

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

In addition, the distributed network system 100 of the present invention will hereinafter be described an example of supporting access technologies such as 5G, WiFi, and fixed (wired access), but in addition to the distributed network system 100 of the present invention, 3G, 4G, etc. It should be noted in advance that the same can be applied to various wireless access technologies of.

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

CGW is an entity in charge of routing the traffic of the user terminal UE, and 5G BS, WiFi BS, Fixed SW, etc. and CGW are IP (Internet Protocol) tunneled to deliver traffic. CGW is in charge of data processing in the wired/wireless integrated core network, UCE is in charge of controlling CGWs/eUCEs in the core network, and HSS stores and manages subscriber information. In addition, UCE supports mobility between eUCEs, and UCE/eUCE can control allocation and release of IP addresses to UEs. In contrast to 3GPP LTE, CGW is similar to the role of SGW or PGW, and UCE can be understood to have a similar role to MME.

4A is an example of a data flow when a user terminal UE1 communicates with a counter node CN1 in the distributed network system 100 of FIG. 3. FIG. 4B is an example of a data flow when a user terminal moves from the location of UE1 to UE2 in the distributed network system 100 of FIG. 3 when communicating with the pre-moving node CN1 and the new node CN2.

As shown in Figure 4a, when the user terminal UE1 communicates with the counter node CN1, for example, through 5G among various access methods such as 5G, WiFi, and fixed (wired connection), the user terminal UE1 serves from eUCE1 to CGW1. Address IP1 from the range of IP addresses can be assigned and used.

When the user terminal moves from the location of UE1 to UE2, as shown in FIG. 4B, the previous CGW1 is a CGW2 that manages the access of the user terminal UE2 using a tunnel, etc., for IP1 connected to the counterpart node CN1. It delivers session information, and CGW2 also serves IP1 address of UE1, which is a range of IP addresses that it does not service. In addition, eUCE2, which controls CGW2, assigns a new address IP2 from the range of IP addresses served by CGW2 to UE2 so that UE2 can perform new communication with other node CN2 on the network through other access methods such as WiFi, and communicates Can support.

FIG. 5 is a diagram illustrating a 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 is in charge of various controls, and the PGW and SGW are in charge of data, so it may appear as if the control plane and the data plane are separated, but the PGW and SGW also have the control part of the gateway function Therefore, the control plane and data plane are not completely separated.

On the other hand, in the present invention, the entity in charge of control in the control plane is referred to as eUCEs/UCEs and the entity that processes data in the data plane is referred to as CGWs. An interactive interface can be formed between eUCE and CGW in a relationship of 1:1, 1:N, N:M (N and M are natural numbers). In the present invention, the eUCEs 1 to n each interface with at least one of the CGWs 1 to m of the data plane. Each eUCE performs necessary control by giving down various control information to CGW. eUCE is in charge of overall control and provides information related to switch control of CGW to CGW. In particular, each eUCE allocates and releases an IP address to the UE(s) connected to the corresponding CGW. CGW receives various control information from eUCE and takes charge of the switch function to deliver user data traffic. The CGW performs various processes required to deliver 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-tuples including IP addresses. 5-tuple is source IP address/port number (source IP address and port number), destination IP address/port number (destination IP address and port number), and protocol (protocol) information. The dual IP address includes the IP address of the UE allocated by eUCE.

6A to 6D are examples for explaining a control process relationship between eUCEs and CGWs when a UE moves in the distributed network system 100 of FIG. 3.

When the user terminal UE is assigned an IP address from eUCE1 and moves to CGW2 after accessing CGW1 (see FIG. 4B), control may be handed over to eUCE2 managing CGW2 in the same manner as in FIGS. 6A to 6D.

First, as shown in FIG. 6A, eUCE1, which determines that the user terminal UE has moved to CGW2, requests eUCE2 to process control related to the IP address pre-allocated to the UE (IP Manager Change Req., IP manager change request). 611). In response, eUCE2 transmits a corresponding response (IP Manager Change Resp.) to eUCE1 (612). In addition, eUCE1 transmits a message (Control Change Req.) to CGW1 indicating that eUCE2 will instruct the processing of control related to the IP address previously allocated to the UE (613). In response, CGW1 transmits a corresponding response (Control Change Resp.) to eUCE1 (614). Thereafter, eUCE2 transfers switch control related to processing of the previously allocated IP address to CGW2 (615), and CGW2 responds thereto (616). Thereafter, seamless service is possible to the user terminal UE through CGW2, which is controlled by eUCE2.

In addition, as shown in FIG. 6B, a method of informing CGW1 that eUCE2 will instruct the UE to process control related to an IP address previously allocated to the UE may be used. That is, eUCE1, which determines that the user terminal UE has moved to CGW2, requests eUCE2 to process control related to the IP address previously allocated to the UE (IP Manager Change Req., IP manager change request) (621). In response, eUCE2 transmits a corresponding response (IP Manager Change Resp.) to eUCE1 (622). In addition, eUCE2 transmits a message (Control Change Req.) to CGW1 indicating that it will instruct the processing of control related to the IP address previously allocated to the UE (623). In response, CGW1 transmits a corresponding response (Control Change Resp.) to eUCE2 (624). Thereafter, eUCE2 transfers control of a switch related to processing of a pre-assigned IP address to CGW2 (625), and CGW2 responds thereto (626). Thereafter, seamless service is possible to the user terminal UE through CGW2, which is controlled by eUCE2.

In addition, FIGS. 6C and 6D illustrate a method of informing eUCE1 that eUCE2, which determines that the user terminal UE has moved to CGW2 and accessed, will be in charge of processing control related to the IP address pre-assigned to the UE.

That is, in FIG. 6C, eUCE2, which determines that the user terminal UE has moved to CGW2, requests eUCE1 to handle control related to the IP address previously assigned to the UE (IP Manager Change Req., IP manager change request). Notified through a message (631). In response, eUCE1 transmits a corresponding response (IP Manager Change Resp.) to eUCE2 (632). In addition, eUCE1 transmits a message (Control Change Req.) to CGW1 indicating that eUCE2 will instruct the processing of control related to the IP address previously allocated to the UE (633). In response, CGW1 transmits a corresponding response (Control Change Resp.) to eUCE1 (634). Thereafter, eUCE2 transfers switch control related to processing of the previously allocated IP address to CGW2 (635), and CGW2 responds thereto (636). Thereafter, seamless service is possible to the user terminal UE through CGW2, which is controlled by eUCE2.

In addition, in FIG. 6D, eUCE2, which determines that the user terminal UE has moved to CGW2, requests eUCE1 to take charge of control processing related to the IP address previously assigned to the UE (IP Manager Change Req., IP manager change request). Notified via message (641). In response, eUCE1 transmits a corresponding response (IP Manager Change Resp.) to eUCE2 (642). In addition, eUCE2 transmits a message (Control Change Req.) to CGW1 indicating that it will instruct the processing of control related to the IP address previously allocated to the UE (643). In response, CGW1 transmits a corresponding response (Control Change Resp.) to eUCE2 (644). Thereafter, eUCE2 transfers the switch control related to the processing of the previously allocated IP address to CGW2 (645), and CGW2 responds thereto (646). CGW2, under the control of eUCE2, instructs CGW1 to route, tunnel, and buffer the IP address to provide a seamless service to the UE that moves to CGW2.

7 is a diagram for explaining sharing of information managed by eUCE in the distributed network system 100 of FIG. 3.

In the wired/wireless integrated core network of the present invention, a DB (database) 710 that stores user context information, and AAA (Authentication, Authorization, Accounting), mobility, policy, and QoS (Quality of Service), etc., a DB 720 that stores user profile information is operated. 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 subscriber information obtained by eUCE from the HSS according to user access is stored and managed.

Each eUCE may update User context information or User Profile information of the DBs 710 and 720, and the updated DBs 710 and 720 may be referenced by other eUCEs. That is, a plurality of eUCEs share User context information or User Profile information managed by each eUCE in the DBs 710 and 720, so that CGWs can be controlled to properly support a switch function for transmitting data traffic.

FIG. 8A is a flowchart illustrating a procedure for allocating an IP address for UE access by eUCE in the distributed network system 100 of FIG. 3. FIG. 8B is a flowchart illustrating a procedure for eUCE to release an IP address in response to a disconnection of a UE in the distributed network system 100 of FIG. 3.

First, in FIG.8A, when the UE connects through a base station or access point or switch (hereinafter referred to as a base station, etc.) of access technology such as 5G, WiFi, and fixed (810), eUCE is determined for the connection of the UE through the base station After receiving the information of and authenticating the UE (811), an IP address is assigned to the UE (812). Information about the access through the base station of the UE, etc., eUCE can be delivered from the core network through a NAS (Non Access Stratum) message. The IP assigned by eUCE to a UE belongs to the category of IP addresses that the CGW in which the UE exists can handle. The eUCE provides the allocated IP address to the CGW and the base station (813), and updates and stores the corresponding address in the User Context information DB 710 storing information on IP address allocation for each user terminal (814). Conventionally, the PGW allocates and stores the IP addresses of corresponding user terminals, but the conventional technology has a disadvantage in that it is impossible to select a flexible path for user mobility.

Meanwhile, in FIG. 8B, when the UE disconnects the access through the base station (820), eUCE receives predetermined information about the disconnection of the UE through the base station, etc., and determines the number of IP addresses of the UE. Collection information is provided 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). For billing purposes, the IP address collection information may be managed in a separate DB (823).

9A is an example of a configuration procedure for receiving IP address allocation information from eUCE by a CGW and a base station in the distributed network system 100 of FIG. 3 and processing traffic for a corresponding IP address. 9B is an example of a CGW and a base station in the distributed network system 100 of FIG. 3 receiving release information of IP address allocation from eUCE and showing a release procedure for a corresponding IP address.

First, in FIG. 9A, IP address allocation information indicating that the eUCE has allocated an IP address for the UE to the CGW may be transmitted to the CGW and the base station (910). Accordingly, the CGW and the base station set each of the routing table 911, tunneling table 912, and downlink buffering 913 information for IP address allocation, and the corresponding IP address of the UE. A switch function for delivery of user data traffic, such as traffic routing, tunneling, and buffering for addresses, can be supported. These 911 to 913 can be changed in order.

Similarly, in FIG. 9B, the eUCE may transmit IP address retrieval information indicating that the CGW has retrieved (released) the IP address of the UE to the CGW and the base station (920). Accordingly, the CGW and the base station set (unset) the information of the routing table 921, the tunneling table 922, and the downlink buffering 923, respectively, for the number of IP addresses. , It is possible to stop supporting the switch function for delivery of user data traffic, such as routing, tunneling, and buffering for the corresponding IP address of the UE. The order of these 921 to 923 can be changed.

In this way, according to the request of eUCE, the CGW and the base station may perform corresponding setting or deconfiguration in the order of a routing table, a tunneling table, and downlink buffering information, respectively. However, in some cases, when eUCE allocates an IP address to the UE, it may request the CGW and the base station to separately configure each of the routing table, tunneling table, and downlink buffering information. For deconfiguration, eUCE may separately request deconfiguration for the above information.

On the other hand, downlink buffering can be performed by either CGW or a base station (such as a base station or an access point or switch of access technology such as 5G, WiFi, and fixed), or both. The setting of the routing table at the base station or the like includes the setting for transmission at the link layer in accordance with 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 the UP (data plane) are separated according to the present invention, the network in which the entities of the UP are distributed (the entity of the CP can also be distributed. ), if the control entities of the CP (control plane) controlling the entities of the UP are different from each other, the user's IP address and the control right for the traffic are managed between them, so that data is transmitted like a conventional PGW (PDN Gateway). It is possible to effectively solve the problem that the path of communication traffic is centrally concentrated by allocating IP addresses centrally in the processing entity and in charge of routing. In addition, when IP addresses are allocated at the edge of the network close to the user's location, not only the routing path of user data can be reduced, but also the IP address management by the CP control entity for the movement of users. Through this, user traffic can be efficiently processed.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, 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 interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

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
User terminal (UE)

Claims (14)

In the method of operating a distributed network system by separating the control plane and the data plane,
Allocating and releasing an IP (Internet Protocol) address for the user terminal according to the information on the connection of the user terminal in the control plane entity, and updating and storing the corresponding information in a common database; And
In the data plane entity that is controlled by the control plane entity and supports the user terminal to access the wired/wireless integrated core network for a plurality of communication methods, the IP address assigned to the user terminal from the control plane entity Receiving and performing a switch function for transferring data traffic between the user terminal and a counter node based on the IP address; And
When the user terminal connects to the entity of the first data plane and then moves to access the entity of the second data plane among the entities of the data plane, in order to transfer control over the user terminal,
Determining a movement of the user terminal by an entity of the first control plane that manages the entity of the first data plane and requesting a control process related to the IP address of the user terminal to the entity of the second control plane;
The first control plane entity or the second control plane entity sends a message indicating that control processing related to the IP address of the user terminal is performed by the second control plane entity, the first data plane Transmitting to the entity of; And
In the entity of the second control plane that manages the entity of the second data plane, controlling a switch control related to the IP address of the user terminal to be performed in the second data plane
Method of operating a distributed network system comprising a. The method of claim 1,
A method of operating a distributed network system using an interactive interface in a relationship of 1:1, 1:N, N:M (N, M are natural numbers) between entities of a plurality of control planes and entities of a plurality of data planes . The method of claim 1,
In a plurality of control plane entities, with reference to the common database, the plurality of data plane entities transmit the data traffic, including routing, tunneling, and buffering for the IP address allocated to the user terminal. How to operate a distributed network system that controls to support the switch function for. In the method of operating a distributed network system by separating the control plane and the data plane,
Allocating and releasing an IP (Internet Protocol) address for the user terminal according to the information on the connection of the user terminal in the control plane entity, and updating and storing the corresponding information in a common database; And
In the data plane entity that is controlled by the control plane entity and supports the user terminal to access the wired/wireless integrated core network for a plurality of communication methods, the IP address assigned to the user terminal from the control plane entity Receiving and performing a switch function for transferring data traffic between the user terminal and a counter node based on the IP address; And
When the user terminal connects to the entity of the first data plane and then moves to access the entity of the second data plane among the entities of the data plane, in order to transfer control over the user terminal,
In the entity of the second control plane that manages the entity of the second data plane, the entity of the first data plane is to be determined that the movement of the user terminal is to be performed to process the control related to the IP address of the user terminal. Notifying the entity of the first control plane;
The first control plane entity or the second control plane entity sends a message indicating that control processing related to the IP address of the user terminal is performed by the second control plane entity, the first data plane Transmitting to the entity of; And
In the entity of the second control plane, controlling the switch control related to the IP address of the user terminal to be performed in the second data plane
Method of operating a distributed network system comprising a. The method of claim 4,
A method of operating a distributed network system using an interactive interface in a relationship of 1:1, 1:N, N:M (N, M are natural numbers) between entities of a plurality of control planes and entities of a plurality of data planes . The method of claim 4,
In a plurality of control plane entities, with reference to the common database, the plurality of data plane entities transmit the data traffic, including routing, tunneling, and buffering for the IP address allocated to the user terminal. How to operate a distributed network system that controls to support the switch function for. In a distributed network system to operate by separating the control plane and the data plane,
An entity on a control plane that allocates and releases an Internet Protocol (IP) address for the user terminal according to information on the connection of the user terminal and updates and stores the corresponding information in a common database; And
And a data plane entity that is controlled by an entity of the control plane and supports a user terminal to access a wired/wireless integrated core network for a plurality of communication methods,
The data plane entity receives the IP address assigned to the user terminal from the control plane entity, and performs a switch function for transferring data traffic between the user terminal and a counter node based on the IP address. and,
When the user terminal connects to the entity of the first data plane and then moves to access the entity of the second data plane among the entities of the data plane, in order to transfer control over the user terminal,
In the entity of the first control plane that manages the entity of the first data plane, it determines the movement of the user terminal and requests the entity of the second control plane to process control related to the IP address of the user terminal,
The first control plane entity or the second control plane entity sends a message indicating that control processing related to the IP address of the user terminal is performed by the second control plane entity, the first data plane To the entity of the
A distributed network system configured to control an entity of the second control plane that manages the entity of the second data plane so that switch control related to the IP address of the user terminal is performed in the second data plane. The method of claim 7,
A distributed network system using an interactive interface 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). The method of claim 7,
In a plurality of control plane entities, with reference to the common database, the plurality of data plane entities transmit the data traffic, including routing, tunneling, and buffering for the IP address allocated to the user terminal. A distributed network system that controls to support the switch function for. In a distributed network system for operating by separating the control plane and the data plane,
An entity on a control plane that allocates and releases an Internet Protocol (IP) address to and from the user terminal according to information on the connection of the user terminal, and updates and stores the corresponding information in a common database; And
And a data plane entity that is controlled by an entity of the control plane and supports a user terminal to access a wired/wireless integrated core network for a plurality of communication methods,
The data plane entity receives the IP address assigned to the user terminal from the control plane entity, and performs a switch function for transferring data traffic between the user terminal and a counter node based on the IP address. and,
When the user terminal connects to the entity of the first data plane and then moves to access the entity of the second data plane among the entities of the data plane, in order to transfer control over the user terminal,
In the entity of the second control plane that manages the entity of the second data plane, the entity of the first data plane is to be determined that the movement of the user terminal is to be performed to process the control related to the IP address of the user terminal Notify the entity of the first control plane,
The first control plane entity or the second control plane entity sends a message indicating that control processing related to the IP address of the user terminal is performed by the second control plane entity, the first data plane To the entity of the
A distributed network system for controlling the entity of the second control plane to perform switch control related to the IP address of the user terminal in the second data plane. The method of claim 10,
A distributed network system using an interactive interface 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). The method of claim 10,
In a plurality of control plane entities, with reference to the common database, the plurality of data plane entities transmit the data traffic, including routing, tunneling, and buffering for the IP address allocated to the user terminal. A distributed network system that controls to support the switch function for. delete delete

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