Communication system, communication management server, control device, communication management method, and program

Abstract

A communication system (S1) according to one embodiment of the present disclosure comprises a control device (10) that controls connection of a terminal, and a communication management server (11) that is connected to the control device (10). The control device (10) transmits position information of a terminal to the communication management server (11) in response to receiving, from the terminal, a connect request to a first connection destination. The communication management server (11) acquires second connection destination information indicating a second connection destination of the terminal associated with the position information and transmits, to the control device (10), the acquired second connection destination information. The control device (10) prioritizes the second connection destination indicated by the second connection destination information over the first connection destination, sets the second connection destination as the connection destination of the terminal, and implements control so as to connect the terminal to the second connection destination.

Description

Technical Field

[0001] The present invention relates to a communication system, a communication management server, a control device, a communication management method, a communication control method, and a non-transitory computer-readable medium.

Background Art

[0002] Various communication systems including a terminal (User Equipment: UE) are disclosed. For example, Patent Document 1 discloses a communication system in which after a terminal transmits a TAU / RAU Request to a radio access network node, the radio access network node selects a core network node based on information corresponding to the usage type of the terminal.

[0003] Further, Patent Document 2 discloses a communication system in which a group closed network performs path control with separated ID / Locator when the IP address of a terminal is used as an ID and the MAC address of a group closed network gateway is used as a Locator.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In 5G (5th Generation) or 4G (4th Generation) mobile services, enabling a terminal to connect to various communication services is beneficial for both users and mobile network operators (communication carriers). However, to do so, it is necessary to change the DNN (Data Network Name) or APN (Access Point Name) of the terminal. Although it is possible to have the user operate the terminal to specify the DNN / APN to be connected, there is a problem that it is troublesome for the user to operate.

[0006] In view of the above problems, an object of the present disclosure is to provide a communication system, a communication management server, a control device, a communication management method, a communication control method, and a non-transitory computer-readable medium that can reduce the labor of the user's operation of the terminal when the terminal connects to a network.

Means for Solving the Problems

[0007] A communication system according to an aspect of the present embodiment includes a control device that controls the connection of a terminal, and a communication management server connected to the control device. The control device transmits the position information of the terminal to the communication management server in response to receiving a connection request from the terminal to a first connection destination. The communication management server acquires second connection destination information indicating a second connection destination of the terminal associated with the position information, and transmits the acquired second connection destination information to the control device. The control device sets the second connection destination indicated by the second connection destination information as the connection destination of the terminal with higher priority than the first connection destination, and controls to connect the terminal to the connection destination.

[0008] A communication management server according to an aspect of the present embodiment includes: receiving means for receiving, from a control device that controls the connection of a terminal, first connection destination information that is information on a first connection destination to which the terminal has requested a connection and position information of the terminal; determination means for acquiring second connection destination information that is information on a connection destination of the terminal associated with the position information, and determining whether the second connection destination information is different from the first connection destination information; and transmission means for transmitting the second connection destination information to the control device when the second connection destination information is different from the first connection destination information.

[0009] A control device according to one aspect of the present embodiment includes a receiving unit that receives a connection request from a terminal to a first connection destination, a transmitting unit that transmits the position information of the terminal to a communication management server in response to the connection request, and a connection control unit that sets a second connection destination indicated by second connection destination information received from the communication management server as the connection destination of the terminal with higher priority than the first connection destination and controls to connect the terminal to the connection destination.

[0010] A communication management method according to one aspect of the present embodiment is such that a control device that controls the connection of a terminal transmits the position information of the terminal to a communication management server in response to receiving a connection request from the terminal to a first connection destination, the communication management server acquires second connection destination information indicating a second connection destination of the terminal associated with the position information, transmits the acquired second connection destination information to the control device, and the control device sets the second connection destination indicated by the second connection destination information as the connection destination of the terminal with higher priority than the first connection destination and controls to connect the terminal to the connection destination, which is executed by a communication system.

[0011] Another communication management method according to the present embodiment is such that a communication management server receives first connection destination information, which is information on a first connection destination to which a terminal has requested a connection, and the position information of the terminal from a control device that controls the connection of the terminal, acquires second connection destination information, which is information on a connection destination of the terminal associated with the position information, determines whether the second connection destination information is different from the first connection destination information, and transmits the second connection destination information to the control device when the second connection destination information is different from the first connection destination information.

[0012] A communication control method according to one aspect of the present embodiment is such that a control device receives a connection request from a terminal to a first connection destination, transmits the position information of the terminal to a communication management server in response to the connection request, sets a second connection destination indicated by second connection destination information received from the communication management server as the connection destination of the terminal with higher priority than the first connection destination, and controls to connect the terminal to the connection destination.

[0013] A non - transient computer - readable medium according to one aspect of the present embodiment receives, from a control device that controls connection of a terminal, first connection destination information which is information of a first connection destination to which the terminal has requested connection and position information of the terminal, acquires second connection destination information which is information of a connection destination of the terminal associated with the position information, determines whether the second connection destination information is different from the first connection destination information, and causes a computer to transmit the second connection destination information to the control device when the second connection destination information is different from the first connection destination information. A program for causing the computer to execute the above is stored therein.

[0014] A non - transient computer - readable medium according to another aspect of the present embodiment receives a connection request from a terminal to a first connection destination, transmits, in response to the connection request, the position information of the terminal to a communication management server, sets a second connection destination indicated by the second connection destination information received from the communication management server as the connection destination of the terminal with higher priority than the first connection destination, and controls to connect the terminal to the set connection destination. A program for causing a computer to execute the above is stored therein.

Advantages of the Invention

[0015] According to the present disclosure, it is possible to provide a communication system, a communication management server, a control device, a communication management method, a communication control method, and a non - transient computer - readable medium capable of reducing the labor of the operation of the user of the terminal when the terminal connects to a network.

Brief Description of the Drawings

[0016]

Figure 1

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[0017] Embodiment 1 Hereinafter, a first embodiment of the present disclosure will be described with reference to the drawings. 1 is a schematic diagram showing an example of a communication system. The communication system S1 includes a control device 10 and a communication management server 11. The control device 10 belongs to, for example, a core network (or a backbone network) and controls the connection of terminals to various networks. The communication management server 11 is connected to the control device 10 and manages communication between the terminals. The control device 10 and the communication management server 11 are controlled by a control unit (controller) inside each device.

[0018] 1, in response to receiving a connection request from a terminal to a first destination, the control device 10 transmits location information of the terminal to the communication management server 11. This process may be performed by the control device 10 together with an inquiry about subscriber information of the terminal, for example. The communication management server 11 acquires second destination information indicating a second destination of the terminal associated with the location information received from the control device 10, and transmits the acquired second destination information to the control device 10. Note that the destination information is, for example, information such as an access point or a data network to be connected to, but is not limited to this.

[0019] The control device 10 sets the second connection destination indicated by the second connection destination information as the connection destination of the terminal, giving priority over the first connection destination.The control device 10 then controls the terminal to connect to that connection destination.Details of each device will be explained below.

[0020] 2 is a block diagram showing an example of the configuration of the control device 10. The control device 10 includes a receiving unit 101, a transmitting unit 102, and a connection control unit 103. Each of the components will be described below.

[0021] The receiving unit 101 receives a connection request to a first connection destination from a terminal. For example, when the terminal accesses a core network and requests connection to another network, the receiving unit 101 receives this connection request. In response to the connection request received by the receiving unit 101, the transmitting unit 102 transmits location information of the terminal to the communication management server 11. The receiving unit 101 and the transmitting unit 102 may be configured as, for example, a transmitting / receiving unit (transceiver).

[0022] The connection control unit 103 sets the second connection destination indicated by the second connection destination information received from the communication management server 11 as the connection destination of the terminal with higher priority than the first connection destination. "Higher priority" means setting one connection destination selected as the connection destination of the terminal to the second connection destination associated with the location information. However, if the terminal cannot be connected to the second connection destination, the connection control unit 103 may set one connection destination selected as the connection destination of the terminal to the first connection destination. Then, the connection control unit 103 controls to connect the terminal to the set connection destination. As a result, the terminal can be connected to a preferable connection destination.

[0023] Figure 3 is a block diagram showing a configuration example of the communication management server 11. The communication management server 11 includes a reception unit 111, a determination unit 112, and a transmission unit 113. Hereinafter, each component will be described.

[0024] The reception unit 111 receives, from the control device 10, the first connection destination information, which is the information of the first connection destination to which the terminal has requested connection, and the location information of the terminal. The control device 10 transmits, for example, as described above, the first connection destination information and the location information of the terminal to the communication management server 11 when the terminal accesses the core network and requests connection to another network.

[0025] The determination unit 112 acquires the second connection destination information, which is the information of the connection destination of the terminal associated with the location information received by the reception unit 111. Then, it determines whether the second connection destination information is different from the first connection destination information.

[0026] The transmission unit 113 transmits the second connection destination information to the control device 10 when the second connection destination information is different from the first connection destination information. When the determination unit 112 determines that the second connection destination information is the same as the first connection destination information, the transmission unit 113 may transmit a response signal not including the second connection destination information to the control device 10, or may transmit a response signal including the second connection destination information to the control device 10. Also, the reception unit 111 and the transmission unit 113 may be configured as, for example, a transceiver.

[0027] 4 is a flowchart showing an example of a typical process of the control device 10, and the process of the control device 10 will be explained using this flowchart. First, the receiving unit 101 of the control device 10 receives a connection request from the terminal to a first connection destination (step S11; receiving step). In response to the connection request, the transmitting unit 102 transmits location information of the terminal to the communication management server 11 (step S12; transmitting step).

[0028] The connection control unit 103 sets the second connection destination indicated by the second connection destination information received from the communication management server 11 as the connection destination of the terminal, giving priority over the first connection destination, and then performs control so as to connect the terminal to that connection destination (step S13; connection control step).

[0029] 5 is a flowchart showing an example of a typical process of the communication management server 11, and this flowchart will be used to explain the process of the communication management server 11. First, the receiving unit 111 receives first destination information, which is information about a first destination to which a terminal has requested connection, and location information of the terminal from the control device 10 that controls the connection of the terminal (step S21; receiving step). The determining unit 112 acquires second destination information, which is information about the terminal's destination associated with the terminal's location information, and determines whether the second destination information is different from the first destination information (step S22; determining step). If the second destination information is different from the first destination information, the transmitting unit 113 transmits the second destination information to the control device 10 (step S23; transmitting step).

[0030] The control device 10 and communication management server 11 can perform the above processing for each terminal. As a result, when a terminal connects to the network, the control device 10 can set the connection destination information based on the terminal's location information, so the terminal user does not need to change the connection destination information. This reduces the amount of work required for the terminal user to operate the device.

[0031] Embodiment 2 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In Embodiment 2, application examples of Embodiment 1 in each of the 5G and 4G communication standards are shown.

[0032] (5G) FIG. 6 is a schematic diagram showing an example of a 5G communication system. The communication system S3 includes, as main components, an AMF (Access and Mobility Management Function) 20, an AUSF (AUthentication Server Function) / UDM (Unified Data Management) 21, and an SMF (Session Management Function) 22. The AMF 20, the AUSF / UDM 21, and the SMF 22 are nodes belonging to the C-plane function side. Hereinafter, the processing of each device will be described.

[0033] The AMF 20 corresponds to the control device 10 of Embodiment 1 and controls the connection of the terminal T1 to various networks. Specifically, it executes processes such as subscriber authentication / security and terminal location management.

[0034] As shown in FIG. 2, the AMF 20 includes a receiving unit 101, a transmitting unit 102, and a connection control unit 103. The receiving unit 101 receives a connection request to the network from the terminal T1 held by the user U1. This connection request includes at least the DNN_1 (aaa.co.jp; first connection destination information), which is the connection destination information of the terminal T1, and the TA (Tracking Area), which is the information of the location registration area of the base station accommodating the terminal T1. In this example, the TA is "xyz0000", which indicates the location information of the terminal. Further, the connection request also includes the identification information of the terminal T1. The transmitting unit 102, in response to this connection request, transmits an inquiry about the subscriber information of the terminal T1 to the AUSF / UDM 21, and also transmits the identification information, DNN_1, and TA of the terminal T1 to the AUSF / UDM 21. In this way, the AMF 20 authenticates whether the SIM card held by the terminal T1 is connectable. The processing of the connection control unit 103 will be described later.

[0035] The AUSF / UDM21 corresponds to the communication management server 11 in Embodiment 1, is connected to the AMF20, and manages the communication of the terminal. Here, although the AUSF and the UDM are separate nodes, they operate in conjunction. The UDM has a DB210 as a repository for holding and managing subscriber information, and the AUSF executes processing based on the subscriber information held in the DB210. Also, the AUSF / UDM21 acquires subscriber information for each subscriber from the BSS (Business Support System) and stores it in the DB210. The BSS is a management system for subscriber information possessed by a communication carrier. For example, when a subscriber of a terminal subscribes to a contract with the communication carrier, the contract information is notified to the AUSF / UDM21. The AUSF / UDM21 holds this contract information in the DB210 as subscriber information.

[0036] Note that the subscriber information related to each terminal held in the DB210 includes the identification information of the terminal and the connection destination data network corresponding to the position of the terminal, which are associated with each other. In this example, for the terminal T1, the following subscriber information is held in the DB210. When TA is other than "xyz0000": DNN_1 (aaa.co.jp) When TA is "xyz0000": DNN_2 (bbb.co.jp) ···(1) Here, the connection destination C1 indicated by DNN_1 is Gi-LAN#1, while the connection destination C2 indicated by DNN_2 is Gi-LAN#2, and different connection destinations are indicated.

[0037] As shown in FIG. 3, the AUSF / UDM21 includes a receiving unit 111, a determination unit 112, and a transmitting unit 113. The receiving unit 111 receives an inquiry about the subscriber information of the terminal T1 from the AMF20, and, in relation thereto, receives the identification information of the terminal T1, the DNN_1, and the TA information.

[0038] The determination unit 112 acquires the connection destination information of the terminal T1 associated with the TA in response to the inquiry received by the reception unit 111. Specifically, the determination unit 112 searches for and refers to the data network information (1) of the connection destination associated with the terminal T1 from the subscriber information held in the DB210 using the identification information of the terminal T1 as a key. Since the TA is "xyz0000", the DNN_2 (bbb.co.jp; the second connection destination information) shown in (1) is acquired. Then, it is determined that the acquired DNN_2 is different from the DNN_1 transmitted by the terminal T1. When the determination unit 112 determines that the DNN_2 is different from the DNN_1, the transmission unit 113 transmits the subscriber information including the DNN_2 to the AMF20 as an Ack response to the communication.

[0039] The reception unit 101 of the AMF20 receives an Ack response (subscriber information) for the communication from the AUSF / UDM21. The connection control unit 103 sets, as the connection destination of the terminal T1, the DNN_2 included in the subscriber information received by the reception unit 101 instead of the DNN_1 first received from the terminal T1. Then, by causing the transmission unit 102 to transmit the DNN_2 to the SMF22, it controls to connect the terminal T1 to the DNN_2.

[0040] The SMF22 performs session management such as session establishment and disconnection for each network slice. The SMF22 executes the session establishment process for the received DNN_2 by receiving the DNN_2 from the AMF20. The details of this connection process will be described later.

[0041] In this way, terminal T1 can connect to Gi-LAN#2, which is the connection destination indicated by DNN_2. If the TA transmitted by terminal T1 is other than "xyz0000," the determination unit 112 of AUSF / UDM21 acquires DNN_1 in response to the inquiry received by the receiving unit 111. In this case, the determination unit 112 determines that the acquired DNN_1 is the same as the DNN_1 transmitted by terminal T1. Then, the transmitting unit 113 transmits subscriber information, which does not include DNN information, to the AMF20 as an Ack response to the communication. Based on the subscriber information, the AMF20 transmits DNN_1 to the SMF22, thereby controlling the connection of terminal T1 to DNN_1. Therefore, the AMF20 and AUSF / UDM21 in the communication system S3 work together to connect terminal T1 to the appropriate data network indicated by the location information TA. In other words, the communication system S3 can automatically change the connection destination of terminal T1. In addition, the processing performed by AMF20, AUSF / UDM21, and SMF22 is similar to that of known 5G technologies, so description thereof will be omitted.

[0042] FIG. 7 is a sequence diagram showing an example of processing in the communication system S3. The processing performed when terminal T1 starts communication will be described below with reference to FIG. 7. Base station B1 is a component of the RAN (Radio Access Network) and connects terminal T1 to the C-plane side. PCF (Policy Control Function) 23 is a node that performs processing related to network policy, for example, controlling data communication with Gi-LAN #2. Radius (Remote Authentication Dial-In User Service) 24 is a node related to authentication protocols. When SMF 22, which is a client, sends an access request packet, Radius 24, which is a server, replies with one of access permission, access denial, or access challenge (requiring password entry again).

[0043] First, the prerequisite sequence processing will be described. When the user of terminal T1 inserts a SIM (Subscriber Identity Module) card into terminal T1 and operates terminal T1 to start communication processing, terminal T1 connects to base station B1, and both execute the 5G in-area processing P10. Next, when a connection request from terminal T1 to the core network is sent to AMF20, AMF20 and AUSF / UDM21 execute the authentication processing P11. Accordingly, AMF20 and AUSF / UDM21 execute the location registration processing P12. Here, the connection request from terminal T1 to the core network also includes DNN_1, which is the connection destination information recorded on the SIM card.

[0044] Then, as an inquiry about the subscriber information of terminal T1, AMF20 sends Nudm_SDM_Subscribe_Request to AUSF / UDM21 (step S101). AMF20 also sends the identification information of terminal T1, DNN_1 which is the connection destination information, and TA (xyz0000) which is the location information to AUSF / UDM21. As described above, this DNN_1 is the connection destination information recorded on the SIM card.

[0045] The determination unit 112 of AUSF / UDM21 executes the above processing and obtains DNN_2 based on the fact that TA is "xyz0000". Then, the transmission unit 113 sends the subscriber information including DNN_2 to AMF20 as an Ack response to the communication (step S102).

[0046] The connection control unit 103 of AMF20 sets the received DNN_2 as the connection destination of terminal T1. The transmission unit 102 sends Nsmf_PDUSession_Create SM Context Request including the information of DNN_2 to SMF22 as a session start request (step S103).

[0047] Upon receiving the session start request, the SMF 22 transmits an Access Request to the Radius 24 (step S104). In response, the Radius 24 returns an Ack to the SMF 22 indicating access permission (step S105).

[0048] Furthermore, when starting data communication with Gi-LAN#2 indicated by DNN_2, the SMF 22 transmits an Npcf_SMPolicyControl_Request to the PCF 23 (step S106). In response to this, the PCF 23 transmits an Ack indicating permission to the SMF 22 (step S107).

[0049] Based on the Ack received from the PCF 23, the SMF 22 determines that an accounting event has occurred and sends an Accounting Request to the Radius 24 and Gi-LAN #2 (step S108). Here, the SMF 22 can perform connection processing to Gi-LAN #2, which is the appropriate destination, based on the destination information of terminal T1 converted in the processing of steps S101 and S102. In response, the Radius 24 returns an Ack to the SMF 22 indicating that accounting is possible (step S109).

[0050] Upon receiving the Accounting Request, Gi-LAN#2 transmits an Npcf_SMPolicyControl_Request to the PCF 23 when starting data communication with terminal T1 (step S110). In response, the PCF 23 returns an Ack indicating permission to Gi-LAN#2 (step S111).

[0051] In response to the return Ack from Radius 24, SMF 22 transmits an Ack to AMF 20 indicating that a session with Gi-LAN #2 has been started (step S112). In response, AMF 20 transmits an Ack to base station B1 (step S113). In response, base station B1 transmits an Ack to terminal T1 (step S114). In this way, data communication between terminal T1 and Gi-LAN #2 is started.

[0052] FIG. 8 is a schematic diagram showing an example of a 5G communication system according to the related art. The communication system S3’ includes, as main components, an AMF20’, an AUSF / UDM21’ and an SMF22’. The AMF20’, the AUSF / UDM21’ and the SMF22’ have functions similar to those of the AMF20, the AUSF / UDM21 and the SMF22. However, although the AUSF / UDM21’ has a function of replying with subscriber information in response to an inquiry about the subscriber information of the terminal T1 received from the AMF20, it does not have a function of acquiring the destination information of the terminal T1’ associated with the TA and transmitting it to the AMF20’. Therefore, the AMF20’ directly uses the information of DNN_1 received from the terminal T1’ to connect the terminal T1’ to the Gi-LAN#1 indicated by the DNN_1. However, even if the location information indicated by the TA is “xyz0000”, there is a problem that the terminal T1’ is connected to the Gi-LAN#1 instead of the preferably Gi-LAN#2 as the connection destination. In order for the user U1’ to connect the terminal T1 to the Gi-LAN#2, it was necessary to operate the terminal T1’ to switch the connection destination.

[0053] FIG. 9 is a schematic diagram showing an example of the application status of a 5G communication system. FIG. 9 shows a state where the user U1 having the terminal T1 moves from within the premises of the LAN (Local Area Network) 1 to the public network outside the area. The LANs 1 and 2 are predetermined closed area networks, and within the premises, the terminals are connected to the outside via an NR-AP (New Radio-Access Point) and a UPF (User Plane Function) by wireless communication R. Also, the LANs 1 and 2 are connected to each other by a closed area IP (Internet Protocol) network using an IP-VPN (Virtual Private Network). The terminals can be connected to the 5GC (5th Generation Core network) described later via the IP-VPN, and can also be connected to any local service. However, instead of the IP-VPN, the LANs 1 and 2 may be connected to each other by a wide area wired network.

[0054] On the one hand, when user U1 is within the public network coverage area, terminal T1 can be connected to the mobile carrier (MNO; Mobile Network Operator) network via base station B1 and then connected to the Internet through it. Also, terminal T1 can be connected to 5GC through roaming via the MNO network.

[0055] 5GC is a mobile core network system that accommodates 5G radio and is deployed at the business base of L5G (Local 5G) together with the SIM management node. 5GC includes UDM, AMF, SMF, and PCF, and the functions of these nodes are as described above. The SIM management node is provided in the above-mentioned BSS. When it obtains information about the SIM card from the Subscription Manager owned by a SIM vendor different from the L5G operator, it sends that information to UDM as the above-mentioned contract information. UDM holds that information in the database as subscriber information. Note that the SIM management node may be configured as part of the functions of OSS (Operation Support Systems) that supports network operation in addition to BSS.

[0056] When user U1 is within the LAN1 premises, terminal T1 is connected to 5GC via IP-VPN, and further connected from there to connection destination C1 indicated by the connection destination information DNN_1 stored in the SIM owned by terminal T1. This connection destination C1 is a data network that can be used without problems for terminal T1 when it is within the LAN1 premises.

[0057] However, when user U1 leaves LAN1 and is in the public network, terminal T1 is connected to 5GC via base station B1. And there may be a case where connection destination C2 provides services for mobile communication, while connection destination C1 does not provide services for mobile communication. In such a case, the connection destination that is preferably used for communication for terminal T1 is connection destination C2.

[0058] Also, according to the contract between user U1 and the communication carrier, in Gi-LAN#2 indicated by connection destination C2, services related to traffic, such as count-free or video compression, are provided, while in Gi-LAN#1 indicated by connection destination C1, it is assumed that such services may not be provided. When terminal T1 is within the LAN1 premises, even if terminal T1 communicates via the 5GC, the traffic is not counted towards the traffic in the contract between user U1 and the communication carrier. Therefore, even if terminal T1 does not receive the above-mentioned services and is connected to connection destination C1, there is no problem. However, when terminal T1 is on the public network, the traffic of the data communicated via the public network is counted towards the contract traffic. Therefore, it is preferable for terminal T1 to be connected to connection destination C2 where it is possible to receive the above-mentioned services.

[0059] In the above cases, the 5GC can automatically connect terminal T1 to connection destination C2 instead of connection destination C1 when terminal T1 is on the public network by executing the processes shown in FIGS. 7 and 8. Therefore, the trouble of the user U1 operating terminal T1 to switch the connection destination can be saved.

[0060] (4G) Next, an application example of Embodiment 1 in the 4G communication standard is shown. In the following description, the description of the parts described in (5G) will be omitted as appropriate.

[0061] FIG. 10 is a schematic diagram showing an example of a 4G communication system. The communication system S4 mainly includes a Mobility Management Entity (MME) 30, a Home Subscriber Server (HSS) 31, and a Packet data network Gateway (P-GW) 32. The MME 30, HSS 31, and P-GW 32 are nodes belonging to the C-plane function side. Hereinafter, the processing of each device will be described.

[0062] The MME 30 corresponds to the control device 10 of Embodiment 1 and executes processes similar to those of the AMF 20. Specifically, as shown in FIG. 2, the MME 30 includes a receiving unit 101, a transmitting unit 102, and a connection control unit 103. The receiving unit 101 receives a connection request to the network from the terminal T2 owned by the user U2. This connection request includes at least the APN_1 (aaa.co.jp; first connection destination information), which is the connection destination information of the terminal T2, and the TA, which is the information on the location registration area of the base station accommodating the terminal T2. Furthermore, the connection request also includes the identification information of the terminal T2. In response to this connection request, the transmitting unit 102 transmits an inquiry about the subscriber information of the terminal T2 to the HSS 31, and also transmits the identification information, APN_1, and TA of the terminal T2 to the HSS 31. The processing of the connection control unit 103 will be described later.

[0063] The HSS 31 corresponds to the communication management server 11 of Embodiment 1 and executes processes similar to those of the AUSF / UDM 21. The HSS 31 has a DB 310 as a repository for holding and managing subscriber information, and executes terminal communication processing based on the subscriber information held in the DB 310. In addition, the HSS 31 acquires subscriber information for each subscriber from the BSS and stores it in the DB 310.

[0064] Note that the following subscriber information regarding the terminal T2 is held in the DB 310. When TA is other than "xyz0000": APN_1 (aaa.co.jp) When TA is "xyz0000": APN_2 (bbb.co.jp) ···(2) Here, the connection destination C1 indicated by APN_1 is Gi-LAN #1, while the connection destination C2 indicated by APN_2 is Gi-LAN #2, and different connection destinations are indicated.

[0065] As shown in FIG. 3, the HSS 31 includes a receiving unit 111, a determination unit 112, and a transmitting unit 113. The receiving unit 111 receives an inquiry about the subscriber information of the terminal T2 from the MME 30, and, in relation thereto, receives the identification information, APN_1, and TA information of the terminal T2.

[0066] In response to the inquiry received by the receiving unit 111, the determining unit 112 acquires the connection destination information of terminal T2 associated with the TA. At this time, since the TA is "xyz0000", the determining unit 112 acquires APN_2 (bbb.co.jp; second connection destination information) shown in (2). Then, the determining unit 112 determines that the acquired APN_2 is different from APN_1 transmitted by terminal T2. When the determining unit 112 determines that APN_2 is different from APN_1, the transmitting unit 113 transmits the subscriber information including APN_2 to the AMF 20 as an Ack response for communication.

[0067] The receiving unit 101 of the MME 30 receives an Ack response (subscriber information) of the communication from the HSS 31. The connection control unit 103 sets the APN_2 included in the subscriber information received by the receiving unit 101 as the connection destination of the terminal T2, instead of the APN_1 initially received from the terminal T2. Then, the connection control unit 103 controls an S-GW (Serving Gateway) described later to transmit the APN_2 to the P-GW 32, thereby connecting the terminal T2 to the APN_2.

[0068] The P-GW 32 is a gateway for connecting to an external network, and by receiving the APN_2 from the S-GW, executes a process for establishing a session related to the received APN_2. Details of this connection process will be described later.

[0069] In the above manner, the terminal T2 can connect to the Gi-LAN #2 which is the connection destination indicated by APN_2. If the TA sent by the terminal T2 is other than "xyz0000", the determination unit 112 of the HSS 31 acquires APN_1 in response to the inquiry received by the reception unit 111. In this case, the determination unit 112 determines that the acquired APN_1 is the same as the APN_1 sent by the terminal T2. Then, the transmission unit 113 transmits the subscriber information not including the APN information to the MME 30 as an Ack response to the communication. The S-GW controls to connect the terminal T2 to APN_1 by transmitting APN_1 to the P-GW 32 based on the subscriber information. Therefore, the MME 30 and the HSS 31 in the communication system S4 can cooperate to connect the terminal T2 to a suitable data network indicated by its location information TA. In other words, the communication system S4 can automatically convert the connection destination of the terminal T2. In addition, since the processes executed by the MME 30, the HSS 31, and the P-GW 32 are the same as the known 4G technologies, the description thereof is omitted.

[0070] FIG. 11 is a sequence diagram showing an example of the process of the communication system S4. Hereinafter, the process performed when the terminal T2 starts communication will be described with reference to FIG. 11. The S-GW 33 is an in-circuit packet gateway for data transmission, and is also a node that sets and releases communication paths in units of external packet networks with the P-GW 32. The PCRF (Policy and Charging Rule Function) 35 is a node that sets policies such as priority control and charging methods according to communication services. In FIG. 11, Request is described as Req. for omission.

[0071] First, the prerequisite sequence processing will be described. When the user of terminal T2 inserts the SIM card into terminal T2 and operates terminal T2 to start communication processing, terminal T2 connects to base station B2, and both execute 4G presence processing P20. Next, when a connection request from terminal T2 to the core network is sent to MME30, MME30 and HSS31 execute authentication processing P21. Here, the connection request from terminal T2 to the core network also includes APN_1, which is the destination information recorded on the SIM card.

[0072] After the authentication processing P21, MME30 sends an Update Location Req. to HSS31 as an inquiry about the subscriber information of terminal T2 (step S201). MME30 also sends the identification information of terminal T2, APN_1 which is the destination information, and TA which is the location information to HSS31. As described above, this APN_1 is the destination information recorded on the SIM card.

[0073] The determination unit 112 of HSS31 executes the above processing and obtains APN_2 based on the fact that TA is "xyz0000". Then, the transmission unit 113 sends the subscriber information including APN_2 to AMF20 as an Ack response to the communication (step S202).

[0074] The connection control unit 103 of MME30 sets the received APN_2 as the destination of terminal T2. The transmission unit 102 sends a Create Session Req., which is a session start request including the information of APN_2, to S-GW33 (step S203). S-GW33 sends the Create Session Req. to P-GW32 (step S204).

[0075] Upon receiving the session start request, P-GW32 sends an Access Req. to Radius34 (step S205). Radius34 returns an Ack for access permission to P-GW32 accordingly (step S206).

[0076] Also, the P-GW 32 transmits CC (Component Carrier) Req. to the PCRF 35 (step S207). In response, the PCRF 35 transmits an Ack indicating permission to the P-GW 32 (step S208).

[0077] Based on the Ack received from the PCRF 35, the P-GW 32 determines that an accounting event has occurred and transmits Accounting Req. to the PCRF 35 and the Gi-LAN #2 (step S209). Here, the P-GW 32 can perform connection processing to the appropriate connection destination, Gi-LAN #2, based on the connection destination information of the terminal T2 converted in the processes of steps S201 and S202. In response, the PCRF 35 returns an Ack indicating that accounting is possible to the SMF 22 (step S210).

[0078] Also, when starting data communication with the terminal T2, the Gi-LAN #2 that has received Accounting Req. transmits a CCR (Credit Control Request) to the PCRF 35 (step S211). In response, the PCRF 35 returns an Ack indicating permission to the Gi-LAN #2 (step S212).

[0079] In response to the return Ack from the PCRF 35, the P-GW 32 transmits an Ack indicating that the session with the Gi-LAN #2 has been started to the S-GW 33 (step S213). The S-GW 33 transmits an Ack to the MME 30 accordingly (step S214). The MME 30 transmits the Ack to the base station B2 (step S215). The base station B2 transmits the Ack to the terminal T2 accordingly (step S216). In this way, data communication between the terminal T2 and the Gi-LAN #2 is started.

[0080] FIG. 12 is a schematic diagram showing an example of a 5G communication system according to the related art. The communication system S4’ mainly includes an MME30’, an HSS31’ and a P-GW32’. The MME30’, the HSS31’ and the P-GW32’ have functions similar to those of the MME30, the HSS31 and the P-GW32. However, although the HSS31’ has a function of replying subscriber information in response to an inquiry of the subscriber information of the terminal T2’ received from the MME30’, it does not have a function of obtaining the connection destination information of the terminal T2’ associated with the TA and transmitting it to the MME30’. Therefore, the MME30’ directly uses the information of APN_1 received from the terminal T2’ to connect the terminal T2’ to the Gi-LAN#1 indicated by the APN_1. However, even if the location information indicated by the TA is “xyz0000”, there is a problem that the terminal T2’ is connected to the Gi-LAN#1 instead of the preferably connected Gi-LAN#2. In order for the user U2’ to connect the terminal T2’ to the Gi-LAN#2, it was necessary to operate the terminal T1 to switch the connection destination.

[0081] As described above, in the second embodiment, in specific standards such as 5G and 4G, when a terminal connects to a network, it is no longer necessary for a user to perform an operation of switching the connection destination of the terminal.

[0082] In mobile services, using multiple DNNs or APNs as connection destinations to connect a terminal to a variety of services has the benefit of improving the value of the services provided to users. It can also be said that providing a variety of services is beneficial for telecommunications carriers, who can differentiate themselves from other companies. However, requiring users to operate their terminals and specify the DNN or APN to connect to is a time-consuming process. Therefore, it is meaningful to implement this process on the network side in order to provide a variety of services based on the user's contract and location information (location information). Specifically, the UDM or HSS transmits an appropriate connection destination based on the user's contract and location information as subscriber information, and the AMF or MME can control the connection to that destination.

[0083] For example, it is conceivable that a user with little knowledge of DNNs or APNs may switch between multiple communication services (e.g., some with video compression services and some without) using the same device (especially one with the same SIM card). In such cases, the carrier does not need to explain how to switch between these services, thereby reducing the carrier's support costs. Furthermore, when a user switches between multiple communication services on multiple IoT (Internet of Things) device devices, the user does not need to manually configure the DNNs or APNs for each device. This reduces operational costs for IoT device owners.

[0084] When TA is the first location information, the AMF 20 or MME 30 (communication management server) acquires DNN_1 or APN_1 (third connection destination information) associated with the first location information. On the other hand, when TA is the second location information, the AMF 20 or MME 30 acquires DNN_2 or APN_2 (fourth connection destination information) associated with the second location information. With this configuration, the AMF 20 or MME 30 can connect the terminal T1 to an appropriate connection destination according to the location information of the terminal T1.

[0085] Here, the first location information may indicate that the terminal belongs to a predetermined closed network (e.g., Local 5G), and the second location information may indicate that the terminal belongs to the public network. Thereby, even when the user operates his / her terminal with only one SIM card, on the network side, it is possible to connect to an appropriate connection destination according to the presence information of the terminal.

[0086] Also, the first communication service provided by the network indicated by DNN_1 or APN_1 to the terminal and the second communication service provided by the network indicated by DNN_2 or APN_2 to the terminal may be different communication services. Thereby, when the user is in different locations, the terminal can receive different communication services. For example, different communication services can be received when the terminal is connected to the Local 5G network via a LAN and when the terminal is connected to the Local 5G network via the public network. Examples of different communication services include the presence or absence of specific services in Gi-LAN (as an example, services such as free counting and video compression).

[0087] On the network side, TA can be used as the location information used to switch the connection destination of the terminal. Thereby, on the network side, the configuration according to the related art can be easily reused to execute the processing of the present disclosure.

[0088] Also, the present disclosure is applicable to 5G and 4G standards. However, the present disclosure is not limited to standards such as 5G and 4G, and is also applicable to communication networks in which similar processing is executed for communication.

[0089] Note that the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist thereof. Also, the arrows shown in each schematic diagram referred to in Embodiments 1 and 2 illustrate the flow of data described in the specification, and two-way communication regarding other data can be executed between a plurality of devices shown in each schematic diagram.

[0090] In the above-described embodiments, this disclosure has been described as a hardware configuration, but this disclosure is not limited thereto. This disclosure can also be realized by causing a processor in a computer to execute a computer program for the processing (steps) of the devices (for example, control devices, communication management servers, and devices corresponding to those devices in 5G and 4G) described in the above embodiments.

[0091] FIG. 19 is a block diagram showing a hardware configuration example of an information processing apparatus (signal processing apparatus) in which the processing of each of the above-described embodiments is executed. Referring to FIG. 19, this information processing apparatus 90 includes a signal processing circuit 91, a processor 92, and a memory 93.

[0092] The signal processing circuit 91 is a circuit for processing signals in accordance with the control of the processor 92. Note that the signal processing circuit 91 may include a communication circuit that receives signals from a transmission device.

[0093] The processor 92 reads and executes software (computer program) from the memory 93 to perform the processing of the devices described in the above embodiments. As an example of the processor 92, one of a CPU (Central Processing Unit), MPU (Micro Processing Unit), FPGA (Field-Programmable Gate Array), DSP (Demand-Side Platform), and ASIC (Application Specific Integrated Circuit) may be used, or a plurality of them may be used in parallel.

[0094] The memory 93 is composed of a volatile memory, a non-volatile memory, or a combination thereof. The number of memories 93 is not limited to one, and a plurality of them may be provided. Note that the volatile memory may be, for example, a RAM (Random Access Memory) such as a DRAM (Dynamic Random Access Memory) or an SRAM (Static Random Access Memory). The non-volatile memory may be, for example, a ROM (Random Only Memory) such as a PROM (Programmable Random Only Memory) or an EPROM (Erasable Programmable Read Only Memory), or an SSD (Solid State Drive).

[0095] The memory 93 is used to store one or more instructions. Here, the one or more instructions are stored in the memory 93 as a group of software modules. The processor 92 can perform the processing described in the above embodiments by reading out and executing these groups of software modules from the memory 93.

[0096] In addition to being provided outside the processor 92, the memory 93 may include a memory built into the processor 92. Further, the memory 93 may include a storage arranged separately from the processor constituting the processor 92. In this case, the processor 92 can access the memory 93 via an I / O (Input / Output) interface.

[0097] As described above, one or more processors included in each device in the above embodiments execute one or more programs including a group of instructions for causing a computer to perform the algorithms described with reference to the drawings. By this processing, the signal processing methods described in each embodiment can be realized.

[0098] The program can be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROM (Read Only Memory), CD-R, CD-R / W, semiconductor memories (e.g., mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)). Also, the program may be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The transitory computer readable media can supply the program to the computer via wired communication channels such as electric wires and optical fibers, or wireless communication channels.

[0099] Some or all of the above embodiments can also be described as follows, but are not limited thereto. (Appendix 1) A control device for controlling the connection of a terminal, A communication management server connected to the control device, In response to receiving a connection request from the terminal to a first connection destination, the control device transmits the position information of the terminal to the communication management server, The communication management server acquires second connection destination information indicating a second connection destination of the terminal associated with the position information, and transmits the acquired second connection destination information to the control device, The control device preferentially sets the second connection destination indicated by the second connection destination information as the connection destination of the terminal over the first connection destination, and controls to connect the terminal to the connection destination. Communication system. (Appendix 2) when the location information is first location information, the communication management server acquires third connection destination information associated with the first location information as the second connection destination information, and when the location information is second location information, acquires fourth connection destination information associated with the second location information as the second connection destination information, and transmits the acquired second connection destination information to the control device. 10. The communication system of claim 1. (Appendix 3) The first location information indicates that the terminal belongs to a predetermined closed network, and the second location information indicates that the terminal belongs to a public network. 10. The communication system of claim 2. (Appendix 4) a first communication service provided to the terminal by the network indicated by the third connection destination information and a second communication service provided to the terminal by the network indicated by the fourth connection destination information are different communication services; 4. The communication system of claim 2 or 3. (Appendix 5) The location information is information about a location registration area of a base station that accommodates the terminal. 5. A communication system according to any one of claims 1 to 4. (Appendix 6) The control device is a device related to AMF (Access and Mobility Management Function) of the 5G (5th Generation) standard, and the communication management server is a server related to UDM (Unified Data Management) of the 5G standard, 6. A communication system according to any one of claims 1 to 5. (Appendix 7) a receiving means for receiving, from a control device that controls the connection of a terminal, first connection destination information, which is information about a first connection destination to which the terminal has requested connection, and location information of the terminal; Obtaining second connection destination information, which is information on the connection destination of the terminal associated with the position information, and determining means for determining whether the second connection destination information is different from the first connection destination information; Transmission means for transmitting the second connection destination information to the control device when the second connection destination information is different from the first connection destination information. Communication management server. (Appendix 8) When the position information is the first position information, the determination means obtains third connection destination information associated with the first position information as the second connection destination information, and when the position information is the second position information, the determination means obtains fourth connection destination information associated with the second position information as the second connection destination information. The communication management server according to Appendix 7. (Appendix 9) A receiving unit that receives a connection request from the terminal to a first connection destination; A transmitting unit that transmits the position information of the terminal to a communication management server in response to the connection request; A connection control unit that preferentially sets the second connection destination indicated by the second connection destination information received from the communication management server as the connection destination of the terminal over the first connection destination, and controls to connect the terminal to the connection destination. Control device. (Appendix 10) The control device is a device related to the AMF (Access and Mobility Management Function) of the 5G (5th Generation) standard. The control device according to Appendix 9. (Appendix 11) In response to the control device for controlling the connection of the terminal receiving a connection request from the terminal to a first connection destination, the control device transmits the position information of the terminal to a communication management server. The communication management server obtains second connection destination information indicating a second connection destination of the terminal associated with the position information, and transmits the obtained second connection destination information to the control device. The control device controls to set the second connection destination indicated by the second connection destination information as the connection destination of the terminal with higher priority than the first connection destination, and connect the terminal to the connection destination. A communication management method executed by a communication system. (Appendix 12) Receiving, from a control device that controls connection of a terminal, first connection destination information that is information of a first connection destination to which the terminal has requested connection and position information of the terminal. Obtaining second connection destination information that is information of a connection destination of the terminal associated with the position information, and determining whether the second connection destination information is different from the first connection destination information. When the second connection destination information is different from the first connection destination information, transmitting the second connection destination information to the control device. A communication management method executed by a communication management server. (Appendix 13) Receiving a connection request from a terminal to a first connection destination. In response to the connection request, transmitting position information of the terminal to a communication management server. Setting the second connection destination indicated by the second connection destination information received from the communication management server as the connection destination of the terminal with higher priority than the first connection destination, and controlling to connect the terminal to the connection destination. A communication control method executed by a control device. (Appendix 14) Receiving, from a control device that controls connection of a terminal, first connection destination information that is information of a first connection destination to which the terminal has requested connection and position information of the terminal. Obtaining second connection destination information that is information of a connection destination of the terminal associated with the position information, and determining whether the second connection destination information is different from the first connection destination information. When the second connection destination information is different from the first connection destination information, transmitting the second connection destination information to the control device. A non-transitory computer-readable medium storing a program that causes a computer to execute the above. (Appendix 15) Receiving a connection request from a terminal to a first connection destination. In response to the connection request, send the location information of the terminal to the communication management server, Control to preferentially set the second connection destination indicated by the second connection destination information received from the communication management server as the connection destination of the terminal over the first connection destination, and connect the terminal to the connection destination. A non-transitory computer-readable medium storing a program that causes a computer to execute the above.

[0100] As described above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

Explanation of Reference Numerals

[0101] S1~S2 Communication System 10 Control Device 101 Receiver 102 Transmitter 103 Connection Control Unit 11 Communication Management Server 111 Receiver 112 Judgment Unit 113 Transmitter 20 AMF 21 AUSF / UDM 22 SMF 30 MME 31 HSS 32 P-GW

Claims

1. Receiving means for receiving, from a control device that controls connection of a terminal, first connection destination information that is information of a first connection destination to which the terminal has requested connection and position information of the terminal; Determination means for acquiring second connection destination information that is connection destination information of the terminal associated with the position information, and determining whether the second connection destination information is different from the first connection destination information; Transmission means for transmitting the second connection destination information to the control device when the second connection destination information is different from the first connection destination information, and A communication management server.

2. When the position information is first position information, the determination means acquires third connection destination information associated with the first position information as the second connection destination information, and when the position information is second position information, the determination means acquires fourth connection destination information associated with the second position information as the second connection destination information. The communication management server according to claim 1.

3. The first position information indicates that the terminal belongs to a predetermined closed area network, and the second position information indicates that the terminal belongs to a public network. The communication management server according to claim 2.

4. A first communication service provided by a network indicated by the third connection destination information to the terminal and a second communication service provided by a network indicated by the fourth connection destination information to the terminal are different communication services. The communication management server according to claim 2 or 3.

5. The position information is information of a location registration area of a base station that houses the terminal. The communication management server according to any one of claims 1 to 4.

6. The first connection destination is a connection destination stored in a SIM (Subscriber Identity Module) possessed by the terminal. The communication management server according to any one of claims 1 to 5.

7. When the second connection destination information matches the first connection destination information, the transmission means transmits a response signal not including connection destination information to the control device. The communication management server according to any one of claims 1 to 6.

8. The control device is an AMF (Access and Mobility Management Function) of the 5G standard. The communication management server is a UDM (Unified Data Management) of the 5G standard. The communication management server according to any one of claims 1 to 7.

9. The first connection destination information and the second connection destination information are each a DNN (Data Network Name). The communication management server according to claim 8.

10. The control device is an MME (Mobility Management Entity) conforming to the 4G standard. The communication management server is an HSS (Home Subscriber server) conforming to the 4G standard. The communication management server according to any one of claims 1 to 7.

11. The first connection destination information and the second connection destination information are each an APN (Access Point Name). The communication management server according to claim 10.

12. Receiving means for receiving a connection request from a terminal to a first connection destination; Transmitting means for transmitting the location information of the terminal to a 5G standard UDM (Unified Data Management) which is a communication management server in response to the connection request; Connection control means for setting, as a connection destination of the terminal, a second connection destination different from the first connection destination indicated by the second connection destination information received from the UDM with higher priority than the first connection destination, and controlling the terminal to be connected to the connection destination; An AMF (Access and Mobility Management Function) conforming to the 5G standard. Control device.

13. The first communication service provided by the network indicated by the information of the first connection destination to the terminal and the second communication service provided by the network indicated by the second connection destination information to the terminal are different communication services. The control device according to claim 12.

14. The first connection destination is a connection destination stored in a SIM (Subscriber Identity Module) possessed by the terminal. The control device according to claim 12 or 13.

15. When the connection control means cannot connect to the second connection destination, the connection control means sets one connection destination selected as the connection destination of the terminal to the first connection destination. The control device according to claim 12 or 13.

16. A 5G standard AMF (Access and Mobility Management Function) which is a control device for controlling the connection of a terminal; A 5G standard UDM (Unified Data Management) which is a communication management server connected to the control device; In response to receiving a connection request from the terminal to a first connection destination, the AMF transmits the location information of the terminal to the UDM. The UDM acquires second connection destination information different from the first connection destination, indicating a second connection destination of the terminal associated with the location information, and transmits the acquired second connection destination information to the AMF. The AMF sets the second connection destination indicated by the second connection destination information as the connection destination of the terminal with higher priority than the first connection destination, and controls to connect the terminal to the connection destination. Communication system.

17. The first communication service provided by the network indicated by the information of the first connection destination to the terminal is different from the second communication service provided by the network indicated by the second connection destination information to the terminal. The communication system according to claim 16.

18. The first connection destination is a connection destination stored in a SIM (Subscriber Identity Module) of the terminal. The communication system according to claim 16 or 17.

19. When the AMF cannot connect to the second connection destination, the AMF sets one connection destination selected as the connection destination of the terminal to the first connection destination. The communication system according to claim 16 or 17.

20. Receiving, from a control device that controls the connection of the terminal, first connection destination information that is information of a first connection destination to which the terminal has requested a connection and the location information of the terminal. Acquiring second connection destination information that is information of a connection destination of the terminal associated with the location information, and determining whether the second connection destination information is different from the first connection destination information. When the second connection destination information is different from the first connection destination information, transmitting the second connection destination information to the control device. Communication management method executed by a communication management server.

21. The first connection destination is a connection destination stored in a SIM (Subscriber Identity Module) of the terminal. The communication management method according to claim 20.

22. When the second connection destination information matches the first connection destination information, transmitting a response signal not including connection destination information to the control device. The communication management method according to claim 20 or 21.

23. Receiving, from a control device that controls the connection of the terminal, first connection destination information that is information of a first connection destination to which the terminal has requested a connection and the location information of the terminal. Obtain second connection destination information, which is information on the connection destination of the terminal associated with the position information, and determine whether the second connection destination information is different from the first connection destination information. When the second connection destination information is different from the first connection destination information, transmit the second connection destination information to the control device. A program for causing a computer to execute the above.

24. The first connection destination is a connection destination stored in a SIM (Subscriber Identity Module) of the terminal. The program according to claim 23.

25. When the second connection destination information matches the first connection destination information, transmit a response signal not including connection destination information to the control device. The program according to claim 23 or 24 for causing the computer to execute the above.

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