SIM, communication device, switching method, and program

Abstract

To enable a UE to perform communication by connecting to an appropriate private network without manually performing SIM switching work.SOLUTION: A SIM that can be mounted on a communication device including a communication unit includes a data storage unit that stores connection information used for the communication unit to connect to a mobile network, and a switching unit that switches a mobile network to which the communication device connects from a public network to a private network when the communication device moves from an area of the public network to an area of the private network.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a technique for switching an access line for a UE (User Equipment). [Background technology]

[0002] Mobile technologies based on international standards are beginning to be adopted in private networks. For example, in Japan, private LTE and local 5G using the sXGP method have been institutionalized and are in operation.

[0003] In particular, for local 5G, the guidelines state that UE for which a license application has been made as a local 5G mobile station must not emit local 5G radio waves outside the area in which the local 5G network is operated (called the "own land area"). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-023707 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to comply with the above guidelines, for example, when the UE is in a public mobile network (referred to as a public network) area, it may use a SIM for the public network, and when the UE enters a local 5G area from the public network area, it may switch the SIM for the public network to a SIM for the local 5G.

[0006] However, the manual SIM switching process described above is cumbersome, and failure to do so may result in non-compliance with the guidelines. Furthermore, SIM switching is difficult for UEs used as IoT devices, not UEs owned by people. Furthermore, since a company's local 5G radio waves must not be transmitted over the private networks of others operating local 5G, the UE must establish a local 5G connection on an appropriate private network (own land area). These issues are not limited to local 5G, and can arise in the operation of private networks.

[0007] The present invention has been made in consideration of the above points, and aims to provide a technology that enables a UE to connect to an appropriate private network and communicate without having to manually switch SIM cards. [Means for solving the problem]

[0008] According to the disclosed technology, there is provided a SIM that can be installed in a communication device having a communication unit, a data storage unit that stores connection information used by the communication unit to connect to a mobile network; a switching unit that switches a mobile network to which the communication device is connected from a public network to a private network when the communication device moves from an area of ​​a public network to an area of ​​a private network; A SIM comprising: [Effects of the Invention]

[0009] The disclosed technology provides a technology that enables a UE to connect to an appropriate private network and perform communication without manually switching SIMs. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a diagram illustrating an example of the configuration of UE 200. [Figure 2] FIG. 2 is a diagram illustrating an example of the hardware configuration of a SIM. [Figure 3] FIG. 2 is a diagram illustrating an example of the functional configuration of a SIM. [Figure 4] FIG. 2 is a diagram illustrating an example of the functional configuration of a SIM. [Figure 5] FIG. 1 is a diagram illustrating an example of compliance with guidelines. [Figure 6] FIG. 10 is a diagram illustrating an operation image when profile switching is performed. [Figure 7] FIG. 10 is a diagram showing an image of movement in operation example 1. [Figure 8] FIG. 10 is a sequence diagram for explaining an operation example 1. [Figure 9] FIG. 10 is a diagram showing an image of movement in operation example 2. [Figure 10] FIG. 10 is a sequence diagram for explaining an operation example 2. [Figure 11] FIG. 10 is a diagram showing an image of movement in operation example 3. [Figure 12] This is a diagram showing an image of the L5G area and its surrounding base station area. [Figure 13] 10 is a flowchart illustrating an operation example 3. [Figure 14] FIG. 2 is a diagram illustrating an example of the hardware configuration of UE 200. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention (the present embodiment) will be described with reference to the drawings. The embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0012] Below, first, the problems with the conventional technology will be described in more detail, and then the technology according to this embodiment will be described.

[0013] (About the assignment) When switching between access lines using multiple standard SIM cards each containing a profile from a single mobile operator, the following issues arise:

[0014] To have the UE switch the access line and connect to the network, it is necessary to remove and insert the SIM card in the UE to switch. In the case of a UE that supports dual SIM slots, it is not necessary to remove and insert the SIM card, but it is necessary to switch the active slot.

[0015] For UE for humans (e.g., smartphones), the switching process can be cumbersome, but as mentioned above, there are methods of operation that require manual intervention.On the other hand, for UE for objects (e.g., IoT gateways) that cannot be operated by humans, there are few methods of operation that allow automatic switching without manual intervention.

[0016] With a UE for humans, even if the user moves across access lines operated by different providers, the user can recognize when the user is out of service area and can switch the SIM card. However, with a UE for objects, it is difficult to detect when the user is out of service area and switch the SIM card.

[0017] As mentioned above, UEs are prohibited from transmitting local 5G radio waves outside their own land area where the local 5G network is in operation. To comply with this guideline, switching SIM cards as described above is one option. However, the SIM card switching process is cumbersome, and failure to do so may result in non-compliance with the guidelines. In light of these issues, it is necessary for UEs to automatically switch access lines.

[0018] Here, as the PLMN-ID in sXGP-based private LTE, it is possible to use "440-19", a common ID issued by the Ministry of Internal Affairs and Communications, or an original PLMN. Also, as the PLMN-ID in local 5G, it is possible to use "999-002", a common ID issued by the same ministry, or an original PLMN. In this embodiment, it is assumed that the common ID "999-002" is used in local 5G.

[0019] The UE uses the PLMN-ID to identify whether it is permitted to reside in an area. However, as mentioned above, the local 5G PLMN-ID is the same in the home land area and the other land area, so a UE that is permitted to receive local 5G radio waves only in the home land area may also respond to the PLMN-ID in the other land area and emit radio waves.

[0020] The configuration and operation of a device for solving the above problems will be described below.

[0021] (Device configuration example) 1 shows an example of the configuration of UE 200 according to this embodiment. Note that UE may also be called a communication device, a terminal, or the like.

[0022] As shown in Fig. 1, UE 200 includes SIM 100 and communication unit 210. SIM 100 in this embodiment is assumed to be a card-type SIM, but is not limited to this. SIM 100 may also be a chip-type SIM fixed inside communication device 200. SIM 100 is a SIM that can handle Multi-IMSI (Multi-Profile) that stores profile information of multiple providers. Use of SIM 100 eliminates the need to operate multiple SIMs.

[0023] The communication unit 210 is capable of performing communication operations in accordance with commands from a program (called an applet) that runs on the SIM 100.

[0024] UE 200 may be any device that can incorporate SIM 100. For example, communication device 200 may be an IoT device, a smartphone, a tablet, a PC, a server, a CPE, a machine tool, an automobile, a drone, etc. Note that the SIM in the present embodiment may be referred to as an eSIM or an eUICC.

[0025] (Example of hardware configuration for SIM100) Fig. 2 shows an example of the basic hardware configuration of the SIM 100. As shown in Fig. 2, the SIM 100 has a CPU 1, a memory 2, and an interface 3. The CPU 1 executes a program stored in the memory 2, thereby executing the processing of the SIM 100. By executing the program, the SIM 100 performs area determination and profile switching, which will be described later.

[0026] The state of the communication unit 210 is notified to the inside of the SIM 100 through the interface 3, and the SIM 100 can execute processing according to the state in accordance with the program being executed. In this embodiment, the program executed on the SIM 100 is called an applet.

[0027] The applet in the SIM 100 can be stored in the SIM 100 from outside the SIM 100 via a network, or the applet recorded on a portable recording medium (memory, CD-ROM, etc.) can be stored in the SIM 100.

[0028] (Example of SIM100 functional configuration) FIG. 3 shows an example of the functional configuration of SIM 100. As shown in FIG. 3, SIM 100 includes a data storage unit 120 and an applet unit 110. Data storage unit 120 may be called a communication profile area. Applet unit 110 may be called an applet area. Data storage unit 120 stores information necessary for communication unit 210 to connect to a mobile network. Here, this information will be called "mobile network connection information." "Mobile network connection information" may also be called connection information or a profile. Mobile network connection information differs for each mobile network. Data storage unit 120 is specifically a file that constitutes a file system on SIM 100.

[0029] The communication unit 210 can connect to a certain mobile network by reading mobile network connection information for connecting to the mobile network from the data storage unit 120.

[0030] The mobile network connection information includes, for example, an International Mobile Subscriber Identity (IMSI), a Public Land Mobile Network (PLMN) list, and Ki / OPc. Ki / OPc is authentication information for connecting to the corresponding mobile network. Ki / OPc may also be called key information.

[0031] The applet section 110 includes an area determination section 111 and a profile switching section 112. The profile switching section 112 may also be called a "switching section."

[0032] The area determination unit 111 and the profile switching unit 112 are each functional units realized by a program (applet) on the SIM 100. The area determination unit 111 and the profile switching unit 112 can also be realized as a single applet. Note that, for both the data storage 120 and the applet unit 110, information within the area cannot be accessed without the key for the corresponding Security Domain. Therefore, these are secure areas.

[0033] The profile switching unit 112 and the area determination unit 111 will be described in more detail below.

[0034] <Profile switching unit 112> Profile switching unit 112 controls switching of the mobile network to which communication unit 210 connects. When profile switching unit 112 determines to switch the mobile network based on, for example, an instruction or information from area determination unit 111 or communication unit 210, it rewrites the mobile network connection information stored in data storage unit 120 to the mobile network connection information to be switched to, and instructs communication unit 210 to connect to the mobile network after the switch.

[0035] That is, as shown in FIG. 3, profile switching unit 112 holds mobile network connection information for a plurality of mobile networks, and rewrites the information using the mobile network connection information for the mobile network to which the user is to connect.

[0036] 3 shows mobile network 1 connection information 113 and mobile network 2 connection information 114. In this embodiment, mobile network 1 is a public mobile network, and mobile network 2 is a privately operated local 5G network. Hereinafter, the public mobile network will be referred to as the public network, and the privately operated local 5G network will be referred to as the private network, and it is assumed that UE 200 moves from the public network to the private network, or from the private network to the public network.

[0037] The configuration of SIM 100 is not limited to that shown in FIG. 3. SIM 100 may have the configuration shown in FIG. 4. In the configuration shown in FIG. 4, multiple pieces of mobile network connection information are stored in data storage unit 120, and profile switching unit 112 switches the mobile network connection information to be used. In the example of FIG. 4, mobile network 1 connection information 113 and mobile network 2 connection information 114 are stored in data storage unit 120, and profile switching unit 112 switches to use either mobile network 1 connection information 113 or mobile network 2 connection information 114. In the following, the configuration of SIM 100 will be described as being the configuration shown in FIG. 3.

[0038] Here, the priority of the PLMN-ID used in the private network is set to be high. When the UE 200 moves from a public network to a private network, the profile switching unit 112 searches for the PLMN-ID (high-priority PLMN-ID) of the private network using a Higher Priority PLMN (HP-PLMN) search timer specified by 3GPP (registered trademark). Specifically, when the UE 200 transitions to the idle state and thereafter, the profile switching unit 112 searches for the high-priority PLMN-ID at the set HP-PLMN timer interval.

[0039] That is, the PLMN-ID contained in the signal received from the base station is passed from the communication unit 210 to the profile switching unit 112, and the profile switching unit 112 searches to determine whether the received PLMN-ID is a high-priority PLMN-ID.

[0040] If the high-priority PLMN-ID is detected, the profile switching unit 112 switches the mobile network connection information (profile) and instructs the communication unit 210 to connect to the private network.

[0041] Note that the above operation is an example. For example, profile switching unit 112 may pass the above high-priority PLMN-ID and timer value to communication unit 210, and communication unit 210 may search for the high-priority PLMN-ID and, if it detects the high-priority PLMN-ID, may notify profile switching unit 112. Upon receiving the notification, profile switching unit 112 switches the mobile network connection information (profile) and instructs communication unit 210 to connect to the private network.

[0042] When the UE 200 leaves the area of ​​the private network, the transition to out-of-service area is triggered, and the mobile network connection information (profile) in the SIM 100 is switched to the mobile network connection information of the public network. In this operation as well, the profile switching unit 112 is used.

[0043] <Area determination unit 111> As mentioned above, UE200 that has applied for a license as a mobile station for a privately operated local 5G network must be operated and managed within its own land area. For example, UE200 that moves across two private land areas must not emit radio waves for the privately operated local 5G network outside its own land area, and must comply with applicable laws and regulations when moving. Figure 5 shows an image of this guideline.

[0044] Basically, the above problem can be solved by the above profile switching unit 112. Fig. 6 shows an image of the operation when the profile switching unit 112 is used.

[0045] However, as described above, since the PLMN-ID of the private network (here, local 5G) is the same in the own land area and the other land area, the profile switching unit 112 (or the communication unit 210) cannot autonomously determine whether the area is the own land area or the other land area based on the PLMN-ID alone. Therefore, for example, if the UE 200 moves from the own land area via a public network and ends up in an unintended other land area, the operation of the profile switching unit 112 described above may cause the UE 200 to connect to the private network in the other land area and emit radio waves, even though the UE 200 is in a location where radio waves should not be emitted.

[0046] The above problem is solved by the area determination unit 111. The area determination unit 111 receives location information from the communication unit 210, and determines whether the current area is the user's own land area or another user's land area based on the location information. If the current area is the user's own land area, the area determination unit 111 instructs the profile switching unit 112 to switch profiles, and if the current area is the other user's land area, the area determination unit 111 does not instruct the profile switching unit 112 to switch profiles, and allows the UE 200 to continue communication over the public network.

[0047] The information used as location information is not limited to specific information, but for example, base station information received from a base station of a public network (PCI (Physical Cell-ID), ECI (E-UTRAN Cell ID), CID (Cell ID), or TAC (Tracking Area Code), etc.), or GPS information based on latitude and longitude, can be used as location information.

[0048] The following describes operation examples 1 to 3. Each operation example is premised on the assumption that the priority of the PLMN-ID of the private network is set higher than the priority of the PLMN-ID of the public network.

[0049] (Example 1) An example of the operation of the UE 200 when the UE 200 moves from a public network area to a private network (own land area) will be described as operation example 1. An image of movement in operation example 1 is shown in FIG.

[0050] Fig. 8 is a sequence diagram for explaining operation example 1. Fig. 8 shows "SIM 100 and communication unit 210" in UE 200. Also shown are public network 300 and private network 400.

[0051] In addition, in Operation Example 1, which assumes movement into the own land area, determination by area determination unit 111 may not be performed. In other words, area determination unit 111 may not be provided in Operation Example 1. Also, in the example shown in Fig. 8, the communication unit 210 searches for a high-priority PLMN-ID.

[0052] During periods S1 to S5, the UE 200 is connected to a public network. Based on polling (S2) from the communication unit 210, the area determination unit 111 of the SIM 100 transmits a location information acquisition request to the communication unit 210 and acquires location information from the communication unit 210. The location information here is, for example, PCI, ECI, CID, or TAC obtained from a signal received from a base station. As described above, the location information may be GPS information.

[0053] In S4, the area determination unit 111 determines based on the location information that the UE 200 is not present in the own land area, and therefore does not perform an operation for connecting to the private network.

[0054] Thereafter, in S5, the UE 200 moves into the coverage area of ​​the private network 400 (its own land area).

[0055] In steps S6 and S7, the area determination unit 111 acquires the location information of the UE 200. Since the location information indicates the own land area, in step S8 the area determination unit 111 determines that the area determination is OK, and instructs the profile switching unit 112 to perform an operation for profile switching.

[0056] In S9, profile switching unit 112 writes the HP-PLMN timer to communication unit 210. In S10, communication unit 210 searches for a high-priority PLMN-ID, and if a high-priority PLMN-ID is detected, in S11 it notifies profile switching unit 112 of this as an event notification. Profile switching unit 112 rewrites the mobile network connection information stored in data storage unit 110 with mobile network connection information of the private network, and instructs communication unit 210 to connect to the private network (S12). In S13 and S14, communication unit 210 connects to private network 400.

[0057] (Example 2) As operation example 2, an operation example of UE 200 when UE 200 moves from an area of ​​a private network to an area of ​​a public network will be described. Fig. 9 shows an image of movement in operation example 2. Fig. 10 is a sequence diagram for explaining the operation of UE 200.

[0058] In S21, UE 200 is connected to private network 400. In S22, UE 200 moves to an area that only has public network 300. In S23, communication unit 210 determines, for example, based on the received PLMN-ID, that the area where UE 200 is located has become out of the service area of ​​the private network.

[0059] In S24, the communication unit 210 sends an event notification to the profile switching unit 112 of the SIM 100 indicating that the SIM 100 has gone out of the service area of ​​the private network.

[0060] The profile switching unit 112 rewrites the mobile network connection information stored in the data storage unit 110 to mobile network connection information for the public network, and instructs the communication unit 210 to connect to the public network (S25). In S26 and S27, the communication unit 210 connects to the public network 300.

[0061] The process of S23 in the above process may be performed by profile switching unit 112. In this case, the received PLMN-ID is notified from communication unit 210 to profile switching unit 112. When profile switching unit 112 detects that it has gone out of the service area of ​​the private network based on the PLMN-ID, it rewrites the mobile network connection information and instructs communication unit 210 to connect to public network 300.

[0062] (Example 3) In operation example 3, an operation example will be described in which there is a possibility that UE200 passes through another user's land area due to movement. Fig. 11 shows an image of movement in operation example 3. In Fig. 11, L5G area C is a another user's land area, and L5G area A and L5G area B are both user's land areas.

[0063] As described above, area determination unit 111 performs area determination based on location information received from communication unit 210. An image of an L5G area and its surrounding base station areas when base station information (specifically, PCI, ECI, CID, TAC, etc.) is used as location information is shown in Fig. 12. UE 200 (communication unit 210) receives base station information for the area in which it is located or the surrounding areas from the base station.

[0064] Information about the base stations in the own land area and its surroundings is set in advance in area determination unit 111 (012 / 014 / 015 / 017 in FIG. 12).

[0065] The area determination unit 111 acquires base station information from the communication unit 210 based on polling from the communication unit 210, and if the acquired base station information matches the pre-registered base station information, it determines that the area in which the UE 200 is located is the own land area and instructs the profile switching unit 112 to perform a profile switching operation.

[0066] Furthermore, in areas where the base station information does not match the pre-registered base station information (001 / 004 / 005 in FIG. 12), the profile switching unit 112 does not operate.

[0067] An example of the flow of operations accompanying movement of UE 200 will be described with reference to Fig. 13. At S101, UE 200 is out of the service area of ​​the private network, and at S102, UE 200 is present in the service area of ​​the public network. After that, UE 200 moves and is present in the service area of ​​another land area or its own land area.

[0068] In S103, the area determination unit 111 determines, through the above-described operation, whether the area in which the UE 200 is currently located is a foreign land area or a local land area. If the current area is a foreign land area (S104), the profile switching unit 112 does not operate, and communication via the public network continues.

[0069] On the other hand, if the current area is the user's own land area (S106), the profile switching unit 112 operates to switch the profile, and communication in the user's own network (user's own land area) starts in S108.

[0070] (Other examples of using base station information) In the above example, when area determination unit 111 performs area determination using base station information obtained from communication unit 210, the base station information used is base station information for the target own land area and its surrounding cells. That is, in the example of Fig. 12, 012 / 014 / 015 / 017 is registered in advance in area determination unit 111 as base station information for L5G Area B, which is the own land area, and its surrounding areas, and area determination unit 111 performs area determination by comparing the base station information obtained from communication unit 210 with 012 / 014 / 015 / 017.

[0071] When the area determination unit 111 performs area determination using base station information obtained from the communication unit 210, the base station information used is not limited to the base station information of the target own land area and its surrounding cells, as described above.

[0072] For example, base station information for the target own land area and the cells adjacent to the surrounding cells may be additionally used as base station information for area determination.

[0073] A specific example will be described using the example of Fig. 12. In addition to 012 / 014 / 015 / 017, which is base station information for L5G area B and its surrounding cells, 011 / 005 / 006 / 013 / 018 / 017 / 016, which is base station information for cells adjacent to these cells, are registered in advance in area determination unit 111.

[0074] Here, it is assumed that the pre-registered "015" is changed to "019" in the actual network. The area determination unit 111 acquires 019, 017, and 018 as base station information from the communication unit 210. Here, although 019 is not pre-registered base station information, the area determination unit 111 can determine that the current area corresponds to the own land area (L5G area B) because 017 and 018 are pre-registered base station information.

[0075] (Example of using information other than location information) In the examples described so far, the area determination unit 111 determines whether the current area is the own land area using location information (specifically, base station information, GPS information) obtained from the communication unit 210, but the information used for area determination is not limited to location information.

[0076] For example, the area determination unit 111 may determine whether the current area is the own land area by using local 5G radio wave information (e.g., RSRP, parameters included in the notification information SIB1, etc.) obtained from the communication unit 210. In this case, local 5G radio wave information obtained in the own land area and its surroundings is registered in the area determination unit 111 in advance.

[0077] The area determination unit 111 acquires radio wave information from the communication unit 210, and if the acquired radio wave information matches pre-registered radio wave information, it determines that the area in which the UE 200 is located is the own land area.

[0078] When RSRP is used as the radio wave information, if the difference between the radio wave information acquired from the communication unit 210 and the pre-registered radio wave information is within a threshold value, it may be determined that they match.

[0079] (Example of UE hardware configuration) The UE 200 (communication device) described in this embodiment can be realized by, for example, causing a computer to execute a program.

[0080] That is, UE 200 can be realized by using hardware resources such as a CPU and memory built into a computer to execute a program corresponding to the processing performed by UE 200. The program can be recorded on a computer-readable recording medium (such as a portable memory) and can be stored or distributed. The program can also be provided via a network such as the Internet or email.

[0081] Fig. 14 is a diagram showing an example of the hardware configuration of the computer. The computer in Fig. 14 has a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, etc., all of which are interconnected by a bus BS. Fig. 14 also shows an example in which a SIM 100 is inserted.

[0082] A program for realizing processing on the computer is provided by a recording medium 1001 such as a CD-ROM or a memory card. When the recording medium 1001 storing the program is set in the drive device 1000, the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000. However, the program does not necessarily have to be installed from the recording medium 1001, but may be downloaded from another computer via a network. The auxiliary storage device 1002 stores the installed program as well as necessary files, data, etc.

[0083] The memory device 1003 reads and stores the program from the auxiliary storage device 1002 when an instruction to start the program is received. The CPU 1004 realizes functions related to the communication device 200 in accordance with the program stored in the memory device 1003. The interface device 1005 is used as an interface (communication function) for connecting to a network or the like. The display device 1006 displays a GUI (Graphical User Interface) or the like according to the program. The input device 1007 is composed of a keyboard, mouse, buttons, a touch panel, or the like, and is used to input various operation instructions. The output device 1008 outputs the results of calculations.

[0084] (Effects of the embodiment) As described above, the technology according to the present embodiment eliminates the need for multiple SIM cards with profiles from several service providers implemented, and the need for manual SIM (profile) switching. Also, by having the SIM autonomously detect the private land area of ​​the private network to which it is permitted to connect, it is possible to prevent a UE moving between private land areas for which a license has been applied from emitting radio waves outside the private land area.

[0085] Furthermore, since the SIM is provided with a profile switching unit and an area determination unit as applets, the operations described in this embodiment can be performed regardless of the type of UE. In other words, UE dependency can be eliminated.

[0086] The following additional notes are provided regarding the above-described embodiments.

[0087] <Additional Notes> (Additional note 1) A SIM that can be installed in a communication device having a communication unit, a data storage unit that stores connection information used by the communication unit to connect to a mobile network; a switching unit that switches a mobile network to which the communication device is connected from a public network to a private network when the communication device moves from an area of ​​a public network to an area of ​​a private network; A SIM with. (Additional note 2) When switching from the public network to the private network is performed, the switching unit switches the connection information of the public network stored in the data storage unit to the connection information of the private network. SIM as described in Appendix 1. (Additional note 3) The area determination unit determines whether the area of ​​the private network is a private land area. SIM as described in Appendix 1. (Additional note 4) The area determination unit determines whether the area of ​​the private network is the private land area based on base station information, GPS information, or radio wave information. SIM as described in Appendix 3. (Additional note 5) The area determination unit operates the switching unit when the area of ​​the private network is the own land area, and does not operate the switching unit when the area of ​​the private network is not the own land area. SIM as described in Appendix 3. (Additional note 6) The communication device includes the SIM according to any one of claims 1 to 5. (Additional note 7) A switching method executed by a SIM that can be installed in a communication device having a communication unit, When the communication unit is connected to a public network using the connection information stored in a data storage unit in the SIM, when the communication device moves from an area of ​​the public network to an area of ​​a private network, the mobile network to which the communication device is connected is switched from the public network to the private network. Switching method. (Additional note 8) A non-transitory storage medium storing a program for causing a SIM to execute the processing of the switching unit described in any one of appendixes 1 to 5. (Additional note 9) A non-transitory storage medium storing a program for causing a SIM to execute the processing of the area determination unit described in any one of appendixes 3 to 5.

[0088] Although the present embodiment has been described above, the present invention is not limited to such a specific embodiment, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. [Explanation of symbols]

[0089] 1 CPU 2. Memory 3 Interface 100 SIM 110 Applet section 111 Area determination unit 112 Profile switching section 120 Data storage unit 200 UE 210 Communications Department 1000 Drive Device 1001 Recording media 1002 Auxiliary storage device 1003 Memory device 1004 CPU 1005 Interface device 1006 Display device 1007 Input Device 1008 Output Device

Claims

1. A SIM that can be installed in a communication device having a communication unit, a data storage unit that stores connection information used by the communication unit to connect to a mobile network; a switching unit that switches a mobile network to which the communication device is connected from a public network to a private network when the communication device moves from an area of ​​a public network to an area of ​​a private network; A SIM equipped with:

2. When switching from the public network to the private network is performed, the switching unit switches the connection information of the public network stored in the data storage unit to the connection information of the private network.

2. The SIM of claim 1.

3. The area determination unit determines whether the area of ​​the private network is a private land area.

2. The SIM of claim 1.

4. The area determination unit determines whether the area of ​​the private network is the private land area based on base station information, GPS information, or radio wave information.

4. The SIM of claim 3.

5. The area determination unit operates the switching unit when the area of ​​the private network is the own land area, and does not operate the switching unit when the area of ​​the private network is not the own land area.

4. The SIM of claim 3.

6. The communication device comprising a SIM according to any one of claims 1 to 5.

7. A switching method executed by a SIM that can be installed in a communication device having a communication unit, When the communication unit is connected to a public network using the connection information stored in the data storage unit in the SIM, when the communication device moves from an area of ​​the public network to an area of ​​a private network, the mobile network to which the communication device is connected is switched from the public network to the private network. Switching method.

8. A program for causing a SIM to execute the process of the switching unit according to any one of claims 1 to 5.

9. A program for causing a SIM to execute the processing of the area determination unit according to any one of claims 3 to 5.

Images