KR102014101B1 - Method and Apparatus for Providing Roaming Service based on Network Slicing - Google Patents

Abstract

In this embodiment, when a user terminal accesses another data network, the selected information about a virtual data network of a domestic communication service provider that needs access in connection with roaming service support is transmitted in the NSSAI, which is a network slice request message, to be constructed in another data network. The present invention relates to a method and apparatus for providing a roaming service using network slicing that enables a domestic telecommunication service provider to move to a virtualized data network.

Description

Roaming service providing method and apparatus using network slicing {Method and Apparatus for Providing Roaming Service based on Network Slicing}

The present embodiment relates to a method and apparatus for providing roaming service using network slicing. More specifically, the present invention relates to a method and apparatus for allowing a user terminal to receive a roaming service based on network slicing without applying for a prior roaming procedure when moving to another country.

The contents described in this section merely provide background information on the present embodiment and do not constitute a prior art.

5G network technology is a successor to 4G LTE mobile communication technology, and aims for a highly converged end-to-end (E2E) system in which all objects of a network connected in various ways, including wired, are connected.

The most striking of the new architectural features of 5G networks is the introduction of network slicing technologies for the Radio Access Network (RAN) and Core Network (CN) architectures. It provides network resources and network functions into one independent slice for each service, providing isolation, customization, and independent management and orchestration of network system functions and resources. The purpose is to apply the property to the mobile communication network structure. Using this network slicing technology, it is possible to provide independent and flexible 5G services by selecting and combining network functions of the 5G system according to criteria of a service, a user, a business model, and the like.

Recently, attempts have been made to integrate network slicing technology into various 5G services. Among them, various researches have been conducted regarding the support of roaming services through network slicing, but at present, the specific methods and utilizations are insufficient.

Accordingly, there is a need for a new technology capable of supporting roaming services through network slicing and minimizing its complexity.

In this embodiment, when a user terminal accesses another data network, the selected information about a virtual data network of a domestic communication service provider that needs access in connection with roaming service support is transmitted in the NSSAI, which is a network slice request message, to be constructed in another data network. The purpose of this is to enable the domestic telecommunications operators to move to the virtualized data network, and thus to receive roaming services more efficiently.

According to the present embodiment, in a first mobility management device supporting roaming service based on network slicing, network identification information and selection assistance information for selecting a network slice instance corresponding to the roaming service are provided from a user terminal. Communication unit for receiving a connection request signal including; A selection unit for selecting a network slice instance to be allocated to the user terminal based on the network identification number and the selection assistance information; And selecting a second mobility management apparatus capable of supporting the roaming service to the user terminal based on the network slice instance selected by the selection unit, and causing the second mobility management apparatus to access the user terminal. It provides a first mobility management device comprising a transmission unit for transmitting a request signal to the second mobility management device to be made.

In addition, according to another aspect of the present embodiment, in the second mobility management device supporting roaming service based on network slicing, from the first mobility management device receiving the first access request signal from the user terminal in connection with the roaming service support A communication unit receiving a NAS Reroute request message; A management unit notifying a base station to which the user terminal is currently connected to the base station to which the user terminal is currently connected to the second mobility management device based on the path change request message; And an execution unit that performs an access procedure with the user terminal when the mobility procedure for the user terminal of the base station is completed.

In addition, according to another aspect of the present embodiment, in the user terminal, the communication unit for transmitting the connection request signal including the network identification information and the selection assistance information for selecting the network slice instance corresponding to the roaming service to the first mobility management device ; And a performer configured to perform an access procedure with the second mobility management apparatus when the mobility procedure from the first mobility management apparatus to the selected second mobility management apparatus is completed based on the access request signal. A user terminal is provided.

Further, according to another aspect of the present invention, in the mobility management method of the first mobility management device for network slicing-based roaming service support, for selecting network identification information and network slice instance corresponding to the roaming service from a user terminal Receiving a connection request signal including selection assistance information; Selecting a network slice instance to be allocated to the user terminal based on the network identification number and the selection assistance information; And selecting a second mobility management apparatus capable of supporting the roaming service to the user terminal based on the selected network slice instance in the selecting process, and causing the second mobility management apparatus to access the user terminal. It provides a mobility management method of the first mobility management device comprising the step of transmitting a request signal to the second mobility management device to be made.

In addition, according to another aspect of the present invention, in the mobility management method of the second mobility management device for network slicing based roaming service support, the first mobility received the first access request signal from the user terminal in connection with the roaming service support Receiving a route change request message from a management device; Notifying a mobility procedure of the user terminal to the second mobility management device to a base station to which the user terminal is currently connected based on the path change request message; And performing a connection procedure with the user terminal when the mobility procedure for the user terminal of the base station is completed.

According to the present embodiment, when a user terminal accesses another data network, the NSSAI, which is a network slice request message, is added to and transmitted selection information about a virtualized data network of a domestic telecommunication service provider that needs access in connection with roaming service support. It enables the movement of the established domestic telecommunications operators to the virtualized data network, thereby enabling the roaming service to be provided more efficiently.

In addition, according to the present embodiment, as the user terminal is moved to the virtualized data network of the domestic telecommunications service provider, there is an effect that the roaming service can be provided without applying for a prior roaming procedure.

In addition, according to the present embodiment, as the user terminal is moved to the virtual data network of the domestic telecommunications carrier, the policy, DPI, billing processing method and additional service of the domestic telecommunications carrier can be equally applied in other regions. have.

1 is a diagram illustrating a network system for providing a roaming service according to the present embodiment.
2 is a block diagram schematically illustrating a user terminal according to the present embodiment.
3 is a block diagram schematically illustrating a first mobility management device according to the present embodiment.
4 is a block diagram schematically illustrating a second mobility management device according to the present embodiment.
5 is a flowchart illustrating a roaming service providing method using network slicing according to the present embodiment.
6 is a flowchart illustrating a mobility management method of a first mobility management device for providing a roaming service according to the present embodiment.
7 is a flowchart illustrating a mobility management method of a second mobility management device for providing a roaming service according to the present embodiment.
8 is an exemplary diagram illustrating a network slicing structure for providing roaming service according to the present embodiment.
9 is an exemplary diagram illustrating selection assistance information for selecting a network slice instance according to the present embodiment.

Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a network system for providing a roaming service according to the present embodiment.

As shown in FIG. 1, a network system for providing a roaming service according to the present embodiment includes a user terminal 100, a first data network 110, and a second data network 120. At this time, the components included in the network system according to the present embodiment are not necessarily limited thereto.

The user terminal 100 refers to a terminal capable of transmitting and receiving various data using a communication intermediary device including an AP according to a user's key operation, and includes a tablet PC, a laptop, a personal computer (PC: A personal computer, a smart phone, a personal digital assistant (PDA), a mobile communication terminal, and an image display device may be used.

The user terminal 100 refers to a terminal to which the roaming service is supported and is provided with a corresponding service according to the policies and resources of the domestic telecommunication service provider.

The user terminal 100 according to the present embodiment may receive a roaming service based on network slicing. That is, when the user terminal 100 moves to another region (country), the access to the virtualized data network provided by the domestic telecommunications provider is adapted to the data network provided by the local telecommunications carrier, rather than the method of accessing the data network provided by the telecommunications carrier of the corresponding region. Roaming service can be provided through a method that is performed as an enemy.

In more detail, the user terminal 100 according to the present embodiment can be provided with policies and resources related to domestic communication services in other regions as it is, without applying for a prior roaming procedure. It is possible.

To this end, the user terminal 100 may add and transmit selection information on a virtual data network of a domestic communication service provider that needs to be connected in connection with roaming service support in NSSAI, which is a network slice request message, when accessing another data network.

Meanwhile, a detailed operation of receiving the roaming service based on network slicing by the user terminal 100 according to the present embodiment will be described in detail in the process of explaining the components of the user terminal 100 of FIG. 2.

The first data network 110 refers to a data network in which the user terminal 100 attempts initial access in connection with roaming service support when the user terminal 100 moves to another region (country). The first data network 110 refers to a data network previously provided by another communication service provider in a roaming area.

The first data network 110 has an independent infrastructure environment for providing network services in its own country (= other region). Such an infrastructure environment may basically have the same configuration as a component of a core network of 5G, and a detailed description thereof will be omitted.

The first data network 110 according to the present embodiment includes a first mobility management device 112, and the first mobility management device 112 is based on a connection request signal received from the user terminal 100. It performs a function of setting and changing the access path of the user terminal 100 associated with the support of the roaming service. That is, the first mobility management device 112 allows the user terminal 100 to move to a virtualized data network (hereinafter, referred to as a second data network) of a domestic communication service provider in connection with the support of the roaming service. It works so that this can be done adaptively.

To this end, the first mobility management device 112 may generate a search request signal for the second data network 120 based on the access request signal received from the user terminal 100 and provide it to the virtualization infrastructure device. have.

Thereafter, the first mobility management device 112 selects a second data network 120 suitable for the user terminal 100 according to a search result provided from the virtualization infrastructure device, and then selects a user based on the selected second data network 120. Roaming service support to the terminal 100 is made to operate.

On the other hand, the first mobility management device 112 according to the present embodiment for the specific operation of setting and changing the connection path of the user terminal 100 in connection with the support of the roaming service, the first mobility management device 112 of FIG. In the process of explaining the components of the) will be described in more detail.

The second data network 120 refers to a data network that provides a substantial roaming service to the user terminal 100. The second data network 120 refers to a virtualized data network established in another region by a domestic telecommunications provider. That is, the second data network 120 implements and provides a differentiated roaming service by implementing and providing a domestic infrastructure environment, which has been provided through a communication service provider of the user terminal 100, in a virtualized manner in relation to the domestic service corresponding to the roaming service. It works to support it.

In more detail, the second data network 120 may be provided as a form of software in a virtualization infrastructure device provided in another region. For example, the second data network 120 may be a network slice instance that provides network resources and functions previously provided from a communication service provider of the user terminal 100 in one independent slice form with respect to a domestic service corresponding to a roaming service. Can be.

The second data network 120 according to the present embodiment includes a second mobility management device 122, so that a roaming service to the user terminal 100 may be supported through the second mobility management device 122. In this case, the second mobility management device 122 may be a network function instance supporting the mobility management function in the network slice instance.

The second mobility management apparatus 122 performs an access procedure with the user terminal 100 based on the path change request message received from the first mobility management apparatus 112, and thereby, the user terminal 100. Roaming service to) can be supported.

To this end, the second mobility management apparatus 122 transfers to the base station to which the user terminal 100 is currently connected to the second mobility management apparatus 122 based on the path change request message received from the first mobility management apparatus 112. The mobility procedure for the user terminal 100 may be notified.

In the meantime, the second mobility management apparatus 122 according to the present embodiment performs a connection procedure with the user terminal 100 based on the path change request message received from the first mobility management apparatus 112. In the process of describing the components of the second mobility management device 122 of FIG. 4 will be described in more detail.

2 is a block diagram schematically illustrating a user terminal according to the present embodiment.

As shown in FIG. 2, the user terminal 100 according to the present embodiment includes a communication unit 200 and an execution unit 210. At this time, the components included in the user terminal 100 according to the present embodiment are not necessarily limited thereto. That is, in FIG. 2, only the main components for roaming service support according to the present exemplary embodiment are shown as examples of various components included in the user terminal 100, and the user terminal 100 is illustrated. It should be recognized that there are more or different components than those.

The communicator 200 refers to an apparatus for transmitting and receiving information necessary for performing a connection to a data network in connection with roaming service support.

The communication unit 200 according to the present embodiment communicates with the first mobility management device 112 existing in the first data network 110 through the base station, and transmits a connection request signal to the first mobility management device 112. Send. Meanwhile, the first mobility management device 112 through which the communication unit 200 transmits the initial access request signal may be determined according to the policy of the base station.

The access request signal transmitted from the communication unit 200 to the first mobility management device 112 may include network identification information of the user terminal 100 and selection assistance information for selecting a network slice instance corresponding to the roaming service. .

In this case, the network identification information may be a PLMN (Public Land Mobile Network) ID given to the communication service provider of the user terminal 100.

In addition, selection assistance information (hereinafter, referred to as selection assistance information) for selecting a network slice instance may be NSSAI (Network Slice Selection Assistance Information). Such NSSAI may include information about a virtual data network (= network slice instance) of a domestic communication service provider that needs access in connection with roaming service support. For example, the NSSAI may include slice / service type information and slice distinguishing attribute information requested by the user terminal 100. On the other hand, specific information about the NSSAI can be confirmed through FIG.

In another embodiment, the connection request signal transmitted from the communication unit 200 to the first mobility management device 112 may further include information such as the number, device ID, SUPI, and GUTI of the user terminal 100.

The performing unit 210 performs an access procedure with the second mobility management apparatus 122 in order to provide a substantial roaming service to the user terminal 100.

In more detail, the execution unit 210 based on the connection request signal, the mobility procedure for the user terminal 100 from the first mobility management device 112 to the selected second mobility management device 122 is completed. The connection procedure with the second mobility management device 122 is performed. Meanwhile, the mobility procedure for the user terminal 100 to the second mobility management apparatus 122 may be adaptively performed through interworking between the first mobility management apparatus 112, the second mobility management apparatus 122, and the base station. have.

The execution unit 210 according to the present embodiment performs an access procedure with the second mobility management device 122 as the mobility procedure for the user terminal 100 to the second mobility management device 122 is adaptively performed. The connection request signal may be utilized in the process of performing the same. This is advantageous in that the retransmission / reception process of the access request signal to the second mobility management apparatus 122 may be omitted in the process of performing the connection procedure with the second mobility management apparatus 122.

Meanwhile, a detailed operation of the access procedure performed by the execution unit 210 with the second mobility management apparatus 122 based on the information included in the access request signal is a general technology in the corresponding field, and thus detailed description thereof will be omitted. .

3 is a block diagram schematically illustrating a first mobility management device according to the present embodiment.

As shown in FIG. 3, the first mobility management apparatus 112 according to the present embodiment includes a communication unit 300, a selection unit 310, and a transmission unit 320.

The communicator 300 refers to an apparatus for transmitting and receiving necessary information for access to a data network between the user terminal 100 and the user terminal 100.

The communication unit 300 according to the present exemplary embodiment receives a connection request signal including network identification information and selection assistance information for selecting a network slice instance corresponding to a roaming service from the user terminal 100.

The selector 310 performs a function of selecting a network slice instance to be allocated to the user terminal 100 based on the network identification information and the selection assistance information in the access request signal received through the communication unit 300. The function performed by the selecting unit 310 selects an optimal virtual data network that can be allocated to the user terminal 100 in connection with the support of the roaming service among the virtual data networks of the domestic telecommunications operators established in other data networks. Corresponds to the process.

Hereinafter, a method of selecting the network slice instance by the selector 310 will be described.

First, the selector 310 determines whether the user terminal 100 is a target terminal for the roaming service based on the network identification information, and selectively performs the selection function for the network slice instance according to the verification result. Can be.

The selecting unit 310 transmits a search request signal for the network slice including the selection assistance information to the virtualization infrastructure device, and receives at least one candidate group information for the network slice instance from the virtualization infrastructure device in response to the search request signal. do.

Meanwhile, the virtualization infrastructure device may be established through an agreement between another communication company and a domestic communication service provider, and stores and provides a plurality of network slice instances related to support of a domestic service corresponding to a roaming service in a software form. The network slice instance stored in the virtualization infrastructure device provides network resources and functions previously provided from the communication service provider of the user terminal 100 for each domestic service as a unique virtual data network in one independent slice form. do.

Meanwhile, the candidate group information received by the selector 310 from the virtualization infrastructure device may be a network function instance (eg: mobility management device) supporting a mobility management function among a plurality of network function instances included in a network slice instance that is a candidate target. Preferably, the information is about, but is not limited thereto.

When there is a plurality of candidate group information on the network slice instance received from the virtualization infrastructure device, the selector 310 may select one candidate group as the final candidate group based on location information and state information corresponding to each candidate group information. For example, the selector 310 may select the final candidate group based on a logical or physical location between the first mobility management apparatus 100 and the mobility management apparatus corresponding to each candidate group information. In another embodiment, the selector 310 may select the final candidate group based on the bandwidth and the delay time for the communication interval between the first mobility management device 100 and the mobility management device corresponding to each candidate group information. have.

The transmitter 320 is a mobility management apparatus capable of supporting the roaming service to the user terminal 100 based on the network slice instance selected by the selector 310 (hereinafter, referred to as a second mobility management apparatus). Screen).

The transmitter 320 transmits the request signal to the second mobility management apparatus 122 to allow the selected second mobility management apparatus 122 to access the user terminal 100.

The transmitter 320 according to the present embodiment sends a path change request message including context information about the base station to which the user terminal 100 and the user terminal 100 are currently connected to the second mobility management apparatus 122. Can transmit For example, the context information about the user terminal 100 may include a connection request signal received by the first mobility management device 112 from the user terminal 100. The context information for the base station may include identification information for the base station to which the user terminal 100 is currently connected.

4 is a block diagram schematically illustrating a second mobility management device according to the present embodiment.

As shown in FIG. 4, the second mobility management apparatus 122 according to the present embodiment includes a processor 400, a memory 410, a communication unit 412, a management unit 414, and an execution unit 416. On the other hand, each component included in the second mobility management device 122 may be implemented as a separate software device, or may be implemented as a separate hardware device combined with software.

The processor 400 performs a function of executing at least one instruction included in the memory 410.

The memory 410 includes at least one instruction executable by the processor 400. In this case, when at least one command included in the memory 410 is executed by the processor 400, the second mobility management apparatus 1220 may communicate with the user terminal 100 in relation to a domestic service corresponding to a roaming service. Mobility management function provided by the operator should be performed. For example, when the command is executed by the processor 400, functional modules such as the communication unit 412, the management unit 414, and the execution unit 416 may be sequentially called and operated.

The communication unit 412 receives a NAS Reroute request message from the first mobility management device 112.

According to the present embodiment, the communication unit 412 may receive a path change request message including context information about a base station to which the user terminal 100 and the user terminal 100 are currently connected from the first mobility management device 112. have.

The management unit 414 performs a mobility procedure for the user terminal 100 to the base station to which the user terminal 100 is currently connected to the second mobility management apparatus 122 based on the path change request message received through the communication unit 412. Perform a notification function.

The management unit 414 identifies the base station to which the user terminal 100 is currently connected through the context information on the base station included in the path change request message, and requests the relocation of the mobility management apparatus associated with the user terminal 100 to the identified base station. Send the signal. On the other hand, the detailed operation of the procedure for relocating the mobility management device corresponding to the user terminal 100 by interworking with the management unit 414 and the base station is a general technology in the relevant field, so a detailed description thereof will be omitted.

The execution unit 416 performs an access procedure with the user terminal 100 when the mobility procedure for the user terminal 100 is completed through the relocation procedure performed between the management unit 414 and the base station.

The execution unit 416 according to the present embodiment identifies the user terminal 100 that is the target of the access procedure through the context information on the user terminal 100 included in the path change request message, and identifies the identified user terminal ( Perform the connection procedure with 100).

The execution unit 416 according to the present embodiment performs a connection procedure with the user terminal 100 as the mobility procedure for the user terminal 100 to the second mobility management apparatus 122 is completed. The connection request signal included in the context information for the 100 may be utilized.

Meanwhile, a detailed operation of performing an access procedure with the user terminal 100 by using the connection request signal by the execution unit 416 is a general technology in the corresponding field, and thus detailed description thereof will be omitted.

5 is a flowchart illustrating a roaming service providing method using network slicing according to the present embodiment.

As shown in FIG. 5, the roaming service providing method using network slicing according to the present embodiment includes steps 1 to ⑪.

① The user terminal 100 transmits a connection request signal to the first mobility management device 112 through the base station. In step ①, the user terminal 100 may transmit a connection request signal including network identification information of the user terminal 100 and selection assistance information for selecting a network slice instance corresponding to the roaming service.

② The first mobility management device 112 checks whether the user terminal 100 is a roaming service target terminal based on the network identification information included in the connection request signal of step ①.

③ The first mobility management device 112 generates a search request signal for the second data network 120 based on the access request signal received from the user terminal 100 in step ① and provides it to the virtualization infrastructure device. .

④, ⑤ The first mobility management device 112 receives candidate group information on at least one network slice instance that can be allocated to the user terminal 100 from the virtualization infrastructure device in response to the search request signal of step ③. The candidate group information received by the first mobility management device 112 from the virtualization infrastructure device in step ⑤ is information about a network function instance supporting mobility management function among a plurality of network function instances included in the network slice instance to be candidate. Can be.

⑥ The first mobility management device 112 selects a network slice instance suitable for the user terminal 100 from among candidate group information received in step ⑤, and supports roaming service to the user terminal 100 based on the selected network slice instance. This possible mobility management device (ex: second mobility management device) is selected.

⑦ The first mobility management device 122 transmits a path change request message to the second mobility management device 122 selected in step ⑥.

⑧ ~ ⑨ The second mobility management device 122 is a base station to which the user terminal 100 is currently connected to the base station to the second mobility management device 122 based on the path change request message received in step ⑦. It informs the mobility procedure of.

The second mobility management apparatus 122 performs an access procedure with the user terminal 100 as the mobility procedure for the user terminal 100 of the base station is completed.

6 is a flowchart illustrating a mobility management method of a first mobility management device for providing a roaming service according to the present embodiment.

The first mobility management device 112 receives a connection request signal including network identification information and selection assistance information for selecting a network slice instance from the user terminal 100 (S602).

The first mobility management device 112 checks whether the roaming service target for the user terminal 100 is based on the network identification information received in step S602 (S604).

When the first mobility management apparatus 112 determines that the user terminal 100 is a roaming service target terminal according to the check result of step S604, the first mobility management apparatus 112 may be assigned to the user terminal 100 based on the selection assistance information received in step S602. The network slice instance is selected (S608). In step S608, the first mobility management device 112 transmits search request information about the network slice including the selection assistance information to the virtualization infrastructure device, and at least for the network slice instance from the virtualization infrastructure device in response to the search request information. One candidate group information can be received.

The first mobility management device 112 selects the second mobility management device 122 capable of supporting the roaming service to the user terminal 100 based on the network slice instance selected in step S608, and selects the selected second mobility management device. In step S610, the route change message is transmitted.

Here, the steps S602 to S610 correspond to the operation of each component of the first mobility management device 112 described above, and thus, further detailed description thereof will be omitted.

7 is a flowchart illustrating a mobility management method of a second mobility management device for providing a roaming service according to the present embodiment.

The second mobility management device 122 receives a path change request message relating to the user terminal 100 from the first mobility management device 112 (S702).

The second mobility management apparatus 122 performs a mobility procedure for the user terminal 100 to the base station to which the user terminal 100 is currently connected to the second mobility management apparatus 122 based on the path change request message received in step S702. A function of notifying the service is performed (S704). In operation S704, the second mobility management apparatus 122 identifies the base station to which the user terminal 100 is currently connected through the context information on the base station included in the path change request message, and identifies the base station with the user terminal 100 as the identified base station. The relocation request signal of the associated mobility management device is transmitted.

When the mobility procedure for the user terminal 100 is completed through step S704, the second mobility management apparatus 122 performs an access procedure with the user terminal 100 (S706). In operation S706, the second mobility management apparatus 122 identifies the user terminal 100, which is the target of the access procedure, through the context information about the user terminal 100 included in the path change request message.

The second mobility management device 122 performs an access procedure with the user terminal 100 based on the connection request signal included in the context information for the user terminal 100.

Here, the steps S702 to S706 correspond to the operations of the respective components of the second mobility management apparatus 122 described above, and thus, further detailed description thereof will be omitted.

6 and 7 are described as sequentially executing each process, but is not necessarily limited thereto. In other words, since the processes described in FIGS. 6 and 7 may be applied by changing or executing one or more processes in parallel, FIGS. 6 and 7 are not limited to the time series order.

As described above, the mobility management method of the mobility management apparatus of FIG. 6 and FIG. 7 is a recording medium (CD-ROM, RAM, ROM, memory card, hard disk, optical) that is implemented as a program and can be read using software of a computer. Magnetic disk, storage device, etc.).

8 is an exemplary diagram illustrating a network slicing structure for providing roaming service according to the present embodiment.

The network slicing structure according to the present embodiment can basically support network system functions and resource separation, customization, and independent management by providing network resources and network functions in one independent slice according to individual services. In the network slicing structure according to the present embodiment, it is possible to provide independent and flexible 5G service by selecting and combining network functions of the 5G system.

The network slicing structure according to the present embodiment provides network resources and functions previously provided from a communication service provider of the user terminal 100 for each domestic service through a virtualization infrastructure device in the form of an independent slice. Each network slice instance stored in the virtualization infrastructure represents a unique virtual data network. For example, according to the network slicing structure according to the present embodiment, the user terminal 100 may be provided with policies and resources related to domestic communication services in other regions as it is, without applying for a prior roaming procedure. It is possible to use more efficient roaming service.

The above description is merely illustrative of the technical idea of the present embodiment, and those skilled in the art to which the present embodiment belongs may make various modifications and changes without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of the present embodiment but to describe the present invention, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present embodiment.

100: user terminal 110: first data network
112: first mobility management device 120: second data network
122: second mobility management device 200, 300, 412: communication unit
210, 416: Execution Unit 310: Selection Unit
320: transmission unit 400: processor
410: memory 414: management

Claims (16)

A first mobility management device supporting roaming service based on network slicing,
A communication unit for receiving a connection request signal including network identification information and selection assistance information for selecting a network slice instance corresponding to the roaming service from a user terminal;
A selector for selecting a network slice instance to be allocated to the user terminal in connection with the roaming service support among virtual data networks of a pre-roaming communication service provider established in a roaming region based on the network identification information and the selection assistance information; ; And
Based on the network slice instance selected by the selection unit, a second mobility management apparatus capable of supporting the roaming service to the user terminal is selected, and the second mobility management apparatus connects to the user terminal. A transmitter for transmitting a request signal to the second mobility management device
A first mobility management device comprising a. The method of claim 1,
The selection assistance information,
And a slice / service type information and slice distinguishing attribute information requested by the user terminal. The method of claim 1,
The selection unit,
Confirm whether the user terminal is a target terminal for the roaming service based on the network identification information, and selectively perform the selection process of the network slice instance based on the selection assistance information according to a confirmation result; The first mobility management device. The method of claim 1,
The selection unit,
At least one transmission request information for the network slice instance including the selection assistance information to the virtualization infrastructure device, and assignable to the user terminal in connection with providing the roaming service from the virtualization infrastructure device in response to the search request information And receiving candidate group information for the network slice instance. The method of claim 4, wherein
The at least one network slice instance,
And a virtualized data network providing network resources and functions previously provided from a communication service provider of the user terminal in a form of an independent slice in relation to a domestic service corresponding to the roaming service. The method of claim 4, wherein
The candidate group information,
The first mobility management device, characterized in that it comprises information on the network function instance supporting the mobility management function among the plurality of network function instances included in the network slice instance to be candidate target. The method of claim 1,
The transmission unit,
And a path change request message including context information of the user terminal and a base station to which the user terminal is currently connected to the second mobility management apparatus. A second mobility management device supporting roaming service based on network slicing,
A communication unit configured to receive a NAS Reroute request message from a first mobility management apparatus in another data network that receives an initial access request signal from a user terminal in connection with roaming service support;
The base station to which the user terminal is currently connected based on the redirection request message, the base station to the second mobility management device in a virtual data network of a pre-roaming communication service provider previously established on a roaming area in connection with the roaming service support; A management unit for notifying mobility procedures for the user terminal; And
An execution unit that performs an access procedure with the user terminal as the mobility procedure for the user terminal of the base station is completed.
A second mobility management device comprising a. The method of claim 8,
Further comprising a memory including at least one instruction executable by the processor,
When the at least one instruction is executed by the processor, causing the second mobility management apparatus to perform a mobility management function previously provided from a communication service provider of the user terminal with respect to a domestic service corresponding to the roaming service; And a second mobility management device. The method of claim 8,
The communication unit,
And receiving the path change request message including context information about the user terminal and the base station from the first mobility management device. The method of claim 10,
The management unit transmits a relocation request signal of the mobility management apparatus associated with the user terminal to a specific base station that matches the context information for the base station,
And the performing unit performs the connection procedure with a corresponding specific user terminal based on the context information on the user terminal. In the user terminal,
A communication unit configured to transmit a connection request signal including network identification information and selection assistance information for selecting a network slice instance corresponding to a roaming service, to a first mobility management device in another data network; And
The second mobility management device as a mobility procedure from the first mobility management device to the second mobility management device in the built-in virtualized data network related to the roaming service support is completed based on the access request signal. Execution unit performing connection procedure between and
A user terminal comprising a. The method of claim 12,
The first mobility management device is a mobility management device existing on a data network established by another communication provider in a roaming area,
And the second mobility management device is a network function instance that performs a mobility management function in a network slice instance provided from a virtualization infrastructure device in connection with the roaming service. The method of claim 12,
The user terminal is moved by the base station to the second mobility management device as the mobility procedure is completed,
The performing unit performs the access procedure based on the access request signal without transmitting and receiving an additional access request signal with the second mobility management device as the second mobility management device moves. A mobility management method of a first mobility management device for supporting network slicing based roaming service,
Receiving a connection request signal including network identification information and selection assistance information for selecting a network slice instance corresponding to the roaming service from a user terminal;
Selecting a network slice instance to be allocated to the user terminal in connection with the support of the roaming service among virtual data networks of a pre-roaming communication service provider established in the roaming region based on the network identification information and the selection assistance information; ; And
The second mobility management apparatus capable of supporting the roaming service to the user terminal is selected based on the selected network slice instance in the selecting process, and the second mobility management apparatus performs an access procedure for the user terminal. Transmitting a request signal to the second mobility management device
A mobility management method of the first mobility management device comprising a. A mobility management method of a second mobility management device for supporting network slicing based roaming service,
Receiving a path change request message from a first mobility management device in another data network that receives an initial access request signal from a user terminal in connection with roaming service support;
The base station to which the user terminal is currently connected based on the path change request message, the base station to the second mobility management device in a virtual data network of a pre-roaming communication service provider previously established in a roaming area in connection with the roaming service Notifying the mobility procedure for the user terminal; And
Performing an access procedure with the user terminal when the mobility procedure for the user terminal of the base station is completed;
The mobility management method of the second mobility management device comprising a.

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