INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND COMPUTER READABLE MEDIUM

To enable a user terminal to appropriately switch a connection between a public network and a non-public network. There is provided an information processing apparatus including: a receiving unit that receives information indicating that a user terminal, which is located in a base station of a public network and connected to the public network in such a way as to be capable of data communication, is located in a base station of a non-public network; and a control unit that controls, based on contract information of the user terminal, to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network.

INCORPORATION BY REFERENCE

This application is based upon and claims the benefit of priority from Japanese patent application No. 2022-055484, filed on Mar. 30, 2022, the disclosure of which is incorporated herein in its entirety by reference.

TECHNICAL FIELD

The present disclosure relates to an information processing apparatus, an information processing method, a program, and an information processing system.

BACKGROUND ART

In recent years, a technology related to a non-public network (e.g., a local 5G) has attracted attention. The non-public network is, for example, a network that provides a mobile communication service in a limited area such as a school, a factory, or a company (e.g., refer to Patent Literature 1 (Japanese Unexamined Patent Application Publication No. 2021-158453)). The non-public network is also referred to as, for example, a non-public network (NPN), a private network, a local cellular network, or the like.

SUMMARY

However, in a technique described in Patent Literature 1, for example, when a user terminal is connectable to a public network and a non-public network, there is a case where a network to be connected cannot be appropriately switched.

In view of the above problem, an example object of the present disclosure is to provide a technique capable of allowing a user terminal to appropriately switch a connection between a public network and a non-public network.

According to a first example aspect of the present disclosure, there is provided an information processing apparatus including: a receiving unit configured to receive information indicating that a user terminal, which is located in a base station of a public network and connected to the public network in such a way as to be capable of data communication, is located in a base station in a non-public network; and a control unit configured to control, based on contract information of the user terminal, to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network.

According to a second example aspect of the present disclosure, there is provided an information processing method including: receiving information indicating that a user terminal, which is located in a base station of a public network and is connected to the public network in such a way as to be capable of data communication, is located in a base station of a non-public network; and controlling to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network, based on contract information of the user terminal.

Further, according to a third example aspect of the present disclosure, there is provided a program causing a computer to execute processing of: receiving information indicating that a user terminal, which is located in a base station of a public network and connected to the public network in such a way as to be capable of data communication, is located in a base station of a non-public network; and controlling to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network, based on contract information of the user terminal.

Further, according to a fourth example aspect of the present disclosure, there is provided an information processing system including an information processing apparatus and a user terminal, wherein the information processing apparatus includes: a receiving unit configured to receive information indicating that a user terminal, which is located in a base station of a public network and connected to the public network in such a way as to be capable of data communication, is located in a base station of a non-public network; and a control unit configured to control, based on contract information of the user terminal, to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network.

According to an example aspect, it is possible for the user terminal to appropriately switch a connection between the public network and the non-public network.

EXAMPLE EMBODIMENT

Principles of the present disclosure are described with reference to several example embodiments. It should be understood that these example embodiments are set forth for purposes of illustration only and that those skilled in the art will assist in understanding and practicing the present disclosure without suggesting limitations on the scope of the present disclosure. The disclosure described herein may be implemented in various methods other than those described below.

In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of those skilled in the art of technology to which the present disclosure belongs.

Hereinafter, example embodiments of the present disclosure will be described with reference to the drawings.

First Embodiment

A configuration of an information processing apparatus10according to an example embodiment will be described with reference toFIG.1.FIG.1is a diagram illustrating an example of a configuration of the information processing apparatus10according to the example embodiment. The information processing apparatus10includes a receiving unit11and a control unit12. These units may be achieved by cooperation of one or more programs installed in the information processing apparatus10and hardware such as a processor101and a memory102of the information processing apparatus10.

The receiving unit11receives information indicating that a user terminal20, which is located in a base station30A of a public network and connected to the public network in such a way as to be capable of data communication, is located in a base station30B of a non-public network. Based on contract information of the user terminal20, the control unit12performs control to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network. As a result, the user terminal20can appropriately switch a connection between the public network and the non-public network.

Second Embodiment

Next, a configuration of an information processing system1according to an example embodiment will be described with reference toFIG.2.

FIG.2is a diagram illustrating a configuration example of the information processing system1according to the example embodiment. In the example ofFIG.2, the information processing system1includes an information processing apparatus10and a user terminal20. Further, the information processing system1includes a base station30A and a base station30B (hereinafter, also simply referred to as a “base station30” when there is no need to distinguish between them). The information processing system1includes a management apparatus40and a contract management apparatus50. Note that the number of the information processing apparatus10, the user terminal20, the base station30, the management apparatus40, and the contract management apparatus50is not limited to the example inFIG.2.

In the example ofFIG.2, the information processing apparatus10, the user terminal20, the base station30, the management apparatus40, and the contract management apparatus50are communicably connected by at least one of a radio access network (RAN) and a core network CN. Note that the number of the information processing apparatus10, the user terminal20, the base station30, the management apparatus40, and the contract management apparatus50is not limited to the example inFIG.2.

The radio access network and the core network CN form a mobile communication system. Examples of the mobile communication system may include a fifth-generation mobile communication system (5G), a sixth-generation mobile communication system (6G, Beyond 5G), a fourth-generation mobile communication system (4G), a third-generation mobile communication system (3G), and the like, but a system conforming to an any suitable standard, which is not limited to these, may be used. Further, wireless communication of a mobile communication system may be performed according to any generation of communication protocols now known or developed in the future.

The user terminal20is any device having a wireless communication function. Examples of the user terminal20(UE: User Equipment) include, but are not limited to, a smart phone, a mobile phone, a tablet terminal, and the like.

A range (coverage) in which the user terminal20can receive radio waves from the base station30is also referred to as a cell. The base station30(BS: Base Station) is a device capable of providing or hosting a cell or coverage in which the user terminal20can communicate. Examples of the base station30include, but are not limited to, a next generation Node B (gNB), an Evolved Node B (eNodeB or eNB), a Node B (NodeB or NB), and the like.

The base station30A is a base station of a public network (carrier network) provided by a telecommunications carrier (communication provider, carrier). In the example ofFIG.2, the base station30A forms a cell30A1.

The base station30B is a base station of a non-public network (NPN). In the example ofFIG.2, the base station30B forms a cell30B1having a narrower coverage than the cell30A1. The non-public network may be, for example, a local 5G (local fifth generation mobile communication system) network. The configuration of the non-public network may be, for example, a configuration of a Public Network Integrated Non-Public Network (PNI-NPN) constructed by sharing at least a part of the function with the public network. Thus, for example, a service in cooperation with the public network can be provided in the non-public network. In this case, for example, a service (e.g., an automatic switching service between a public network and a non-public network or the like) according to contract contents between the telecommunications carrier and a user of the user terminal20can be provided in the non-public network.

The information apparatus10may be, for example, a node (AMF node) having an Access and Mobility management Function (AMF) function for performing mobility management in a core network. The management apparatus40may be a node (UDM node) having a Unified Data Management (UDM) function that manages authentication information and location information in the core network. In this case, the management apparatus40may have AUthentication Server Function (AUSF) function, which is an authentication-processing function.

The contract management apparatus50may be, for example, a business support system (BSS) of a telecommunications carrier. The contract management apparatus50may manage, for example, user (customer) information and contract billing information of each user.

FIG.3is a diagram illustrating an example of a hardware configuration of the information processing apparatus10according to the example embodiment. In the example ofFIG.3, the information processing apparatus10(computer100) includes a processor101, a memory102, and a communication interface103. These units may be connected by a bus or the like. The memory102stores at least a part of a program104. The communication interface103includes an interface necessary for communication with other network elements.

When the program104is executed by cooperation of the processor101, the memory102, and the like, the computer100performs at least a part of processing of the example embodiment of the present disclosure. The memory102may be of any type suitable for a local technology network. The memory102may be, by way of non-limiting example, a non-transitory computer readable storage medium. The memory102may also be implemented by using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. Although only one memory102is illustrated in the computer100, there may be several physically different memory modules in the computer100. The processor101may be of any type. The processor101may include one or more of a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (DSP), and, as a non-limiting example, a processor based on a multi-core processor architecture. The computer100may include a plurality of processors, such as application specific integrated circuit chips, which are temporally dependent on a clock that synchronizes a main processor.

The example embodiments of the present disclosure may be implemented in hardware or dedicated circuit, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other example aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device.

The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as instructions contained in a program module, is executed on a device on a real or virtual processor of interest, and executes the process or method of the present disclosure. The program module includes a routine, a program, a library, an object, a class, a component, a data structure, and the like that perform a particular task or implement a particular abstract data type. A function of the program module may be combined or split between the program modules as desired in various example embodiments. The machine-executable instruction of the program module may be executed in a local or distributed device. In a distributed device, program modules can be arranged on both local and remote storage media.

A program code for performing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes are provided to a processor or controller of a general purpose computer, a special purpose computer, or another programmable data processing apparatus. When the program code is executed by a processor or controller, functions/operations in the flowcharts and/or implementing block diagrams are performed. The program code is executed entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine, partly on a remote machine, or entirely on the remote machine or a server.

<<Processing of Managing Contract Information>>

Next, an example of processing of managing contract information of the information processing system1according to the example embodiment will be described with reference toFIGS.4and5.FIG.4is a sequence diagram illustrating an example of processing of managing contract information of the information processing system1according to the example embodiment.FIG.5is a diagram illustrating an example of information stored in a contract DB (database)501according to the example embodiment.

In step S101, the user terminal20transmits a connection request to the information processing apparatus10via the base station30A. Herein, for example, the user terminal20may transmit the connection request when a Subscriber Identity Module (SIM) card of a telecommunications carrier to which a user has contracted (subscribed) is inserted. In addition, the user terminal20may transmit the connection request when profile data are downloaded to an embedded SIM (eSIM) or an integrated SIM (iSIM), for example. Further, for example, the user terminal20may transmit the connection request when the power of the user terminal20is activated (turned on). The connection request may include an ID (identification information) of the user terminal20. The ID (user ID) may be, for example, a mobile phone number assigned by a telecommunications carrier.

Subsequently, the information processing apparatus10transmits (transfers) the connection request to the contract management apparatus50via the management apparatus40(step S102). Subsequently, the contract management apparatus50transmits (returns, responds) the contract information of the user of the user terminal20to the information processing apparatus10via the management apparatus40(step S103). The contract information of the user may include, for example, a user ID and information indicating contents of a service to which the user has a contract (subscription). The contract information of the user may be registered in the contract management apparatus50by an operator (a salesclerk) or the like in response to an instruction from the user when the user contracts at an actual store such as a telecommunications carrier. Further, the contract information of the user may be registered in the contract management apparatus50from a Web server, for example, when the user makes a new contract (application) or changes the contract content on a Web site of a telecommunications carrier or the like.

Subsequently, the information processing apparatus10records information included in the received contract information in contract DB501(step S104). In the example ofFIG.5, in the contract DB501, a priority non-public network name, a priority non-public network cell, a necessity of approval when connecting to a priority non-public network, and a necessity of approval when reconnecting to a public network are recorded in association with the user ID. Note that the contract DB501may be recorded in a storage apparatus inside the information processing apparatus10or may be recorded in a storage apparatus outside the information processing apparatus10. Note that the contract DB501may be recorded in the user terminal20. In this case, only a record associated with the user ID of the user terminal20in the contract DB501may be recorded in the storage apparatus (e.g., eSIM or iSIM) of the user terminal20.

The priority non-public network name is a name of the non-public network service connecting data communication sessions in preference to the contracted public network. The priority non-public network name may be, for example, Data Network Name (DNN) defined in the Third Generation Partnership Project (3GPP) 5G specification. The priority non-public network name may be, for example, Access Point Name (APN).

The priority non-public network cell is information indicating a cell of a non-public network service that connects a session of data communication in preference to a contracted public network. The priority non-public network cell may be, for example, information indicating a tracking area (TA).

The necessity of approval when connecting to a priority non-public network is information indicating whether or not an approval (confirmation) operation by the user is necessary when the user terminal20connects to the non-public network that connects a data communication session in preference to the contracted public network. A necessity of approval when reconnecting to the public network is information indicating whether or not an approval (confirmation) operation by the user is necessary when the user terminal20is out of service of the cell30B1of the non-public network and connects to the public network again.

<<Processing of Switching from Public Network to Non-Public Network>>

Next, an example of processing of switching from the public network to the non-public network of the information processing system1according to the example embodiment will be described with reference toFIG.6.FIG.6is a sequence diagram illustrating an example of processing of switching from the public network to the non-public network of the information processing system1according to the example embodiment.

In step S201, the user terminal20connects radio communication with the base station30A and transmits Registration Request. Herein, the registration request may include, for example, a user ID of the user terminal20.

Subsequently, the management apparatus40authenticates the user terminal20(step S202). Subsequently, when the authentication in the management apparatus40is successful, the information processing apparatus10performs position registration (attachment) of the user terminal20to the base station30A of the public network (step S203).

Subsequently, the information processing apparatus10connects a session for data communication and a session for voice communication in the public network (step S204). Herein, for example, the information processing apparatus10may cause a Session Management Function (SMF) node to set up a Protocol Data Unit (PDU) session and assign an Internet Protocol (IP) address to the user terminal20.

Subsequently, when the user terminal20is carried by the user and moves within the coverage of the base station30B, the user terminal20connects wireless communication with the base station30B and transmits a registration request to the information processing apparatus10(step S205). Note that the information included in the registration request or the information received by the user terminal20from the base station30B is an example of “information indicating that the user terminal20that is located in the base station30A of the public network and connected in such a way as to be capable of data communication with the public network is located in the base station30B of the non-public network”.

Herein, the registration request may include at least one of a user ID of the user terminal20, a name (e.g., DNN) of a non-public network service of the base station30B, and information indicating a cell (e.g., a tracking area) of the base station30B. Note that the user terminal20may receive the name of the non-public network service of the base station30B and the information indicating the cell of the base station30B from the base station30B.

For example, the user terminal20may transmit, as the registration request, a “Registration Request” message in which a “Registration Type” parameter is set to “Mobility Update” in accordance with the provisions of 5G. In addition, the user terminal20may transmit, for example, “Tracking Area Update Request” as the registration request.

Subsequently, the information processing apparatus10refers to the contract DB501and determines whether or not to connect the user terminal20to the non-public network of the base station30B (step S206). Herein, for example, in a case where a combination (record) of the received user ID and at least one of the name of the non-public network service and the cell of the base station30B is registered in the contract DB501, the information processing apparatus10may determine to connect to the non-public network. In this case, for example, the information processing apparatus10may determine whether the priority non-public network name recorded in association with the user ID of the user terminal20in the contract DB501matches the name of the non-public network service of the base station30B received from the user terminal20. Further, for example, the information processing apparatus10may determine whether the priority non-public network cell recorded in association with the user ID of the user terminal20in the contract DB501matches the cell of the base station30B received from the user terminal20.

When it is not determined to connect to the non-public network of the base station30B, the following processing is not executed. Hereinafter, a case where it is determined to connect to the non-public network of the base station30B will be described.

(Example in which the Necessity of User Approval when Connecting to a Non-Public Network can be Set)

The information processing apparatus10may enable the user to set whether or not an approval operation by the user is necessary when switching from the public network to the non-public network. In this case, in step S207, the information processing apparatus10may refer to the contract DB501and acquire a necessity of approval when connecting to a priority non-public network, which is stored in association with the received user ID. Then, when the necessity of approval when connecting to a priority non-public network is set to “No”, the information processing apparatus10may automatically execute the following processing in step S207and subsequent steps (without an approval operation by the user).

On the other hand, when the necessity of approval when connecting to a priority non-public network is set to “necessary”, the information processing apparatus10may transmit an inquiry to the user terminal20as to whether or not switching from the public network to the non-public network is possible. In this case, the inquiry may include information indicating at least one of the name of the non-public network service and the cell of the base station30B received from the user terminal20.

Then, the user terminal20may display a display window (Graphical User Interface: GUI) including information included in the received inquiry, for example, at the own terminal, and may accept an operation of approval or rejection for switching from the public network to the non-public network from the user. Then, the user terminal20may transmit information indicating approval or rejection designated by the user to the information processing apparatus10. Then, the information processing apparatus10may execute the following processing in step S207and subsequent steps only when being approved by the user.

Subsequently, the information processing apparatus10disconnects (opens) a session for data communication in the public network (step S207). Herein, for example, the information processing apparatus10may transmit information for disconnecting data communication in the public network to the SMF node while maintaining the connection of the session for voice communication in the public network. The SMF node may then open a PDU session for data communication. As a result, only the data communication using the public network by the user terminal20is stopped.

Subsequently, the management apparatus40authenticates the user terminal20(step S208). Subsequently, the information processing apparatus10registers a position of the user terminal20with respect to the base station30B of the non-public network (step S209). Herein, the information processing apparatus10may continue to be able to make and receive voice calls in the public network via the base station30B of the non-public network. Thus, for example, the user terminal20can perform data communication in a non-public network and voice call in a public network.

Subsequently, the information processing apparatus10connects a session for data communication in a non-public network (step S210). Herein, for example, the information processing apparatus10may cause the SMF node to set up a PDU session of a non-public network. Thus, for example, the user terminal20can perform data communication using a non-public network such as a local 5G. In this case, the information processing apparatus10may provide, for example, a specific network slice logically independent of the public network as a data communication service for the non-public network. Thus, for example, it is possible to provide a non-public network service using the base station30B provided in a site of a company of a user or the like, such as in a school, a factory, or a company.

<<Processing in which the User Terminal20Becomes Out of Service of the Cell of the Non-Public Network and Connects to the Public Network Again>>

Next, with reference toFIG.7, an example of processing in which the user terminal20of the information processing system1according to the example embodiment becomes out of service of the cell30B1of the non-public network and is connected to the public network again will be described.FIG.7is a sequence diagram illustrating an example of processing in which the user terminal20of the information processing system1according to the example embodiment is out of service of the cell30B1of the non-public network and is connected to the public network again. Note that the following processing may be executed, for example, when the user terminal20is carried by the user and moves out of service (out of coverage) of the cell30B1of the base station30B after the processing ofFIG.6is executed.

In step S301, the user terminal20connects radio communication with the base station30A and transmits Registration Request. Subsequently, the management apparatus40authenticates the user terminal20(step S302). The processing in steps S301and S302may be the same as the processing in steps S201and S202inFIG.6.

(Example in which it is Possible to Set Whether or not the User Needs to Approve when Connecting to the Public Network Again)

The information processing apparatus10may enable the user to set whether or not an approval operation by the user is necessary when the user terminal20is out of service of the cell30B1of the non-public network and connects to the public network again. In this case, in step S303, the information processing apparatus10may refer to the contract DB501and acquire a necessity of approval when reconnecting to the public network, which is stored in association with the received user ID. Then, when the necessity of approval when reconnecting to the public network is set to “No”, the information processing apparatus10may automatically execute the following processing in step S303and subsequent steps (without an approval operation by the user).

On the other hand, when the necessity of approval when reconnecting to the public network is set to “necessary”, the information processing apparatus10may transmit an inquiry to the user terminal20as to whether or not switching from the non-public network to the public network is possible. In this case, the inquiry may include information indicating at least one of the name of the public network service and the cell of the base station30A received from the user terminal20.

Then, the user terminal20may display a display window (Graphical User Interface: GUI) including information included in the received inquiry, for example, at the own terminal, and may accept an operation of approval or rejection for the connection to the public network again from the user. Then, the user terminal20may transmit information indicating approval or rejection designated by the user to the information processing apparatus10. Then, the information processing apparatus10may execute the following processing in step S303and subsequent steps only when being approved by the user. Thus, for example, when the user moves out of range of the local 5G while continuing large-capacity data communication, the user can determine not to continue the data communication, for example, in a case where the data communication is free or the like in the local 5G, and the data communication is the pay-per-use or the like in the carrier 5G.

Subsequently, the information processing apparatus10registers the position of the user terminal20with respect to the base station30A of the public network (step S303). Subsequently, the information processing apparatus10connects a session for data communication in the public network (step S304). The processing in steps S303and S304may be the same as the processing in steps S203and S204inFIG.6.

Modified Example 1

The user terminal20may be provided with a functional unit that performs processing of at least a part of each functional unit of the information processing apparatus10. In this case, the user terminal20may be configured as the information processing apparatus10. In this case, in the above description, the information processing apparatus10may be replaced with an SMF node or the like, and the user terminal20may be replaced with the information processing apparatus10. In this case, only the record associated with the user ID of the user terminal20in the contract DB501may be recorded in the storage apparatus (e.g., eSIM or iSIM) of the user terminal20that is the information processing apparatus10. Further, the information processing apparatus10may be accommodated in the user terminal20and configured as an integrated information processing apparatus. Such an information processing apparatus10is also included in an example of “information processing apparatus” of the present disclosure.

Modified Example 2

The information processing apparatus10may be an apparatus included in one housing, but the information processing apparatus10of the present disclosure is not limited to this. Each unit of the information processing apparatus10may be achieved by, for example, cloud computing constituted by one or more computers. In addition, the user terminal20may execute at least a part of the processing of each functional unit of the information processing apparatus10. Such an information processing apparatus10is also included in an example of “information processing apparatus” of the present disclosure.

Some or all of the above-described example embodiments may be described as the following supplementary notes, but are not limited thereto.

An information processing apparatus including:a receiving unit configured to receive information indicating that a user terminal is located in a base station of a non-public network, the user terminal being located in a base station of a public network and connected to the public network in such a way as to be capable of data communication; anda control unit configured to control, based on contract information of the user terminal, to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network.

The information processing apparatus according to Supplementary note 1, whereinthe non-public network is a local 5G (local 5th-generation mobile communication system) network, andthe information processing apparatus is an access and mobility management function (AMF) node.

The information processing apparatus according to Supplementary Note 1 or 2, wherein the contract information includes information indicating at least one of data network name (DNN) and a tracking area of the non-public network that prioritizes connecting data communication over the public network.

The information processing apparatus according to any one of Supplementary notes 1 to 3, wherein the control unit controls to transmit information for disconnecting data communication in the public network to an apparatus of the public network while maintaining connection of a session of a voice call in the public network.

The information processing apparatus according to any one of Supplementary notes 1 to 4, wherein the contract information includes information indicating whether an approval operation of a user of the user terminal is necessary when the non-public network that prioritizes connection of data communication over the public network is connected.

The information processing apparatus according to any one of Supplementary notes 1 to 5, wherein the contract information includes information indicating whether an approval operation of a user of the user terminal is necessary when the user terminal is out of range of a base station of the non-public network and reconnects data communication of the public network.

An information processing method including:receiving information indicating that a user terminal is located in a base station of a non-public network, the user terminal being located in a base station of a public network and connected to the public network in such a way as to be capable of data communication; andcontrolling to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network, based on contract information of the user terminal.

A program causing a computer to execute processing of:receiving information indicating that a user terminal is located in a base station of a non-public network, the user terminal being located in a base station of a public network and connected to the public network in such a way as to be capable of data communication; andcontrolling to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network, based on contract information of the user terminal.

An information processing system including:an information processing apparatus; and a user terminal, wherein the information processing apparatus includes: a receiving unit configured to receive information indicating that the user terminal is located in a base station of a non-public network, the user terminal being located in a base station of a public network and connected to the public network in such a way as to be capable of data communication; anda control unit configured to control, based on contract information of the user terminal, to disconnect data communication in the public network and transmit information for connecting data communication in the non-public network.

The information processing system according to Supplementary note 9, wherein the non-public network is a local 5G (local fifth-generation mobile communication system) network, and the information processing apparatus is an access and mobility management function (AMF) node.

REFERENCE SIGNS LIST