JP2018133606A - Communication system, communication terminal, control device, communication control method, and communication program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manage a plurality of communication paths with a packet communication network using a plurality of subscriber information.SOLUTION: A communication system 1 comprises a communication terminal 10 and a control device 30. When a first communication path with a packet communication network is established using first subscriber information, the communication terminal 10 comprises a first acquisition unit 11 which acquires second subscriber information, a communication unit 12 which transmits a connection request including a re-authentication flag and the second subscriber information to the control device 30, and a communication control unit 13 which receives a connection completion from the control device 30 and establishes a second communication path using the second subscriber information. The control device 30 comprises a communication unit 31 which receives the connection request and the second subscriber information from the communication terminal 10, a determination unit 32 which determines whether the re-authentication flag is included in the connection request, and a communication establishment unit 33 which authenticates the second subscriber information, establishes the second communication path, and transmits the connection completion to the communication terminal 10 when the re-authentication flag is included in the connection request.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication system, a communication terminal, a control device, a communication control method, and a communication program.

  Currently, a plurality of operators provide various mobile communication services such as LTE (Long Term Evolution). LTE is a wireless communication method used to realize high-speed and large-capacity wireless communication. The business operator makes a contract according to the service content to a user who is provided with a mobile communication service, and a subscriber identification (SIM) in which subscriber information that can identify the service provider based on the contract is stored. : Subscriber Identity Module or UIM (User Identity Module) card to the user. The SIM card electronically stores connection information and contract information of a telecommunications carrier contracted by the user. The communication terminal equipped with the SIM card can be connected to the mobile communication network by using the subscriber information stored in the SIM card. Therefore, a user of the mobile communication service attaches a SIM card corresponding to the mobile communication service to be used to the communication terminal and receives provision of the mobile communication service.

  Here, the LTE communication system is a system that performs packet communication, and in the LTE communication system, a packet communication network (PDN: Packet Domain Network) is multiplexed. The packet communication network is identified by an identifier called APN (Access Point Name), and LTE-compatible communication terminals can be simultaneously connected to a plurality of separated packet communication networks (PDN).

  As a plurality of separated packet communication networks (PDN), for example, there are an Internet network and an IMS network. An IMS (IP Multimedia Subsystem) network is a network that handles voice call data and SMS (short message service). Voice communication data is required to be concealed, and for the purpose of coexistence with 3G circuit-switched telephone networks, mobile telecommunications carriers are building networks separated from the Internet network. .

  A communication terminal such as a smartphone that supports both data communication and voice call functions connects to two PDNs simultaneously using an APN (Internet-APN) for the Internet network and an APN (IMS-APN) for the IMS network. This realizes separation of communication and voice call.

  In this way, a communication terminal corresponding to LTE uses a method (Multi PDN Connection) for simultaneously establishing individual sessions for a plurality of packet communication networks (PDN), and a plurality of packet communication networks and a plurality of communication. Establish a road. For example, Patent Document 1 discloses a communication network (PDN) that performs packet data communication such as the Internet and IMS (IP Multimedia Subsystem) as an external NW (Network). It is disclosed to establish a communication path with a network connected to a LAN communication network.

  When connecting to the PDN, the PDN to be connected is specified using the APN, and communication is performed through connection authentication by the communication gateway on the PDN side using an ID (Identifier) and a password. In addition, the communication paths with the plurality of PDNs are separated into logical transmission paths called “bearers” in LTE wireless communication, and each PDN connection is individually connected to a communication path ( Bearer) is managed.

Japanese Patent Laid-Open No. 2006-174339

  Here, when a communication terminal corresponding to LTE establishes a communication path with a packet communication network (PDN), subscriber information stored in a subscriber identification (SIM) card is used. When a communication terminal establishes communication paths with a plurality of PDNs, it first establishes a communication path with a base PDN (default PDN or Default PDN), and then establishes a communication path with a PDN different from the default PDN. I do.

  Normally, since one SIM card is attached to one communication terminal, when establishing a plurality of communication paths with a plurality of PDNs including a default PDN as in Patent Document 1, the SIM card is connected to the SIM card. Stored subscriber information is used. In other words, the subscriber information used when establishing a plurality of communication paths is only the subscriber information used for establishing a communication path with the default PDN.

  Therefore, in establishing a communication path with a PDN different from the default PDN, subscriber information different from the subscriber information used for establishing a communication path with the default PDN cannot be used. That is, a plurality of communication paths cannot be established with one or more PDNs using a plurality of subscriber information. Therefore, there arises a problem that a plurality of communication paths with one or more PDNs cannot be managed using a plurality of subscriber information.

  The present invention has been made to solve such problems, and a communication system, a communication terminal, and a communication terminal capable of managing a plurality of communication paths with a packet communication network using a plurality of subscriber information, It is an object to provide a control device, a communication control method, and a communication program.

  A communication system according to the present invention is a communication system including a communication terminal and a control device, and uses the first subscriber information for connecting to a mobile communication network. When the first communication path is established with any of the communication terminals, the communication terminal uses the second subscriber information to acquire the second subscriber information, and the one or more packet communications using the second subscriber information When requesting establishment of a second communication path with any one of the networks, a connection request for setting a communication path including a re-authentication flag for requesting authentication of the second subscriber information, and the second subscriber A first communication unit that transmits information to the control device, and a connection completion indicating that communication channel establishment is completed from the control device, and the second communication unit that uses the second subscriber information Communication system that establishes a communication path A second communication unit that receives the connection request and the second subscriber information from the communication terminal, and the connection request includes a re-authentication flag. If the re-authentication flag is included, the second subscriber information is authenticated and the second communication path is used using the second subscriber information. A communication establishment unit that establishes a communication path with the packet communication network and transmits the connection completion to the communication terminal.

  The communication terminal according to the present invention uses the first subscriber information for connecting to the mobile communication network and establishes the first communication path with one of the one or more packet communication networks. Requesting the establishment of a second communication path with any one of the one or more packet communication networks using the second subscriber information, and an acquisition unit that acquires the subscriber information of two, A communication unit for transmitting a connection request for setting a communication path including a re-authentication flag for requesting authentication of the second subscriber information and the second subscriber information to the control device; and the control device And a communication control unit that establishes the second communication path using the second subscriber information by receiving a connection completion from.

  The control device according to the present invention establishes a first communication path with any one of the one or more packet communication networks using the first subscriber information for connecting to the mobile communication network. A communication unit that receives, from a communication terminal, a connection request for requesting establishment of a second communication path with any one of the one or more packet communication networks, and second subscriber information; A determination unit that determines whether or not the re-authentication flag is included in the connection request; and when the re-authentication flag is included, the second subscriber information is authenticated and the second subscriber information is authenticated. And a communication establishment unit for establishing a communication path with the packet communication network corresponding to the second communication path.

  A communication control method according to the present invention is a communication control method in a communication system comprising a communication terminal and a control device, and uses one or more first subscriber information for connecting to a mobile communication network. When the first communication path is established with any one of the packet communication networks, the communication terminal uses the second subscriber information to request authentication of the second subscriber information. A connection request for setting a second communication path with any one of the one or more packet communication networks, and the second subscriber information are transmitted to the control device, When the connection request and the second subscriber information are received from the communication terminal and the re-authentication flag is included in the connection request, the second subscriber information is authenticated, 2 subscriber information There are, for establishing a communication path between the communication terminal and a packet communication network corresponding to the second communication channel.

  A communication program according to the present invention establishes a first communication path with one of one or more packet communication networks using first subscriber information for connecting to a mobile communication network. The second subscriber information is obtained, and the second subscriber information is used to request establishment of a second communication path with the packet communication network using the second subscriber information. Transmitting a connection request for setting a communication path including a re-authentication flag for requesting authentication of information and the second subscriber information to the control device; and receiving a connection completion from the control device Thus, the communication terminal is caused to execute the step of establishing the second communication path using the second subscriber information.

  According to the present invention, it is possible to manage a plurality of communication paths with a packet communication network using a plurality of subscriber information.

1 is a diagram illustrating a configuration example of a communication system according to a first exemplary embodiment. It is a figure which shows the structural example of the communication system concerning Embodiment 2. FIG. It is a sequence diagram which shows the procedure which establishes the communication path of UE and default PDN. It is a sequence diagram which shows the procedure which establishes a communication path between UE and an IMS network. It is a figure which shows the structural example of the communication system concerning Embodiment 2. FIG. It is a figure which shows the structural example of the communication system concerning Embodiment 2. FIG. FIG. 10 is a sequence diagram illustrating an operation example in the communication system according to the second exemplary embodiment. It is a block diagram which shows the structural example of UE50 concerning Embodiment 3. FIG. FIG. 10 is a sequence diagram illustrating an operation example of the communication system according to the third exemplary embodiment.

(Embodiment 1)
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted as necessary.
First, a configuration example of the communication system 1 according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating a configuration example of a communication system 1 according to the first embodiment. As shown in FIG. 1, the communication system 1 includes a communication terminal 10, a base station 20, a control device 30, a first packet communication network (PDN) 40, and a second packet communication network (PDN) 41.

  The communication terminal 10 may be a mobile phone terminal, a smart phone terminal, a tablet terminal, a mobile router, a personal computer device, or the like. The base station 20 communicates with the communication terminal 10 and communicates with the control device 30. For example, the control device 30 may be an MME defined in 3GPP. The control device 30 communicates with the communication terminal 10 via the base station 20 to establish a communication path between the communication terminal 10 and the first PDN 40 and the second PDN 41.

  The first PDN 40 and the second PDN 41 may be, for example, an Internet network, an IMS network, or the like. The communication path between the communication terminal 10 and the first PDN 40 and the second PDN 41 is performed using subscriber information for the user of the communication terminal 10 to connect to the mobile communication network. The subscriber information may be, for example, ICCID (Integrated Circuit Card ID), IMSI (International Mobile Subscriber Identity), or MSISDN (Mobile Station International Subscriber Directory Number).

  The ICCID is a unique identification number assigned to the SIM card itself, and consists of a 19-digit numerical value. IMSI is an identification number for uniquely specifying a user who is provided with a mobile communication service, and is composed of 15 digits. The IMSI is a 3-digit MCC (Mobile Country Code) indicating the country of use, a 2-digit MNC (Mobile Network Code) indicating the mobile carrier, and a 10-digit MSIN (Mobile Station Identification Number) identifying the subscriber. Composed. MSISDN is a 15-digit numerical value uniquely determined as an identification number for mobile phones, and an identification number based on an international public communication number plan generally defined by the ITU-T recommendation is assigned to MSISDN. Generally, it is used as an international telephone number.

  Here, in the communication system 1 in FIG. 1, it is assumed that the communication path between the communication terminal 10 and the first PDN 40 has already been established using the first subscriber information of the communication terminal 10. In other words, it is assumed that the first subscriber information has already been authenticated. In FIG. 1, two of the first PDN 40 and the second PDN 41 are shown, but three or more PDNs may be provided.

Next, a configuration example of the communication terminal 10 will be described. The communication terminal 10 includes an acquisition unit 11, a communication unit 12, and a communication control unit 13.
The acquisition unit 11 acquires second subscriber information used when establishing a communication path with the second PDN 41. As described above, since it has already been established using the first subscriber information of the communication terminal 10, the acquisition unit 11 also acquires the first subscriber information. Moreover, the acquisition part 11 may acquire two or more subscriber information.

  The communication unit 12 uses the second subscriber information to obtain a connection request, which is an establishment request signal for establishing a communication path between the communication terminal 10 and the second PDN 41, and the second subscriber information. It transmits to the control apparatus 30. When establishing a communication path with the second PDN 41 using the second subscriber information, the communication unit 12 includes a re-authentication flag in the connection request and transmits it to the control device 30. The re-authentication flag is a flag for requesting authentication of subscriber information used when establishing a communication path.

  Here, the communication terminal 10 has already established a communication path with the first PDN 40 using the first subscriber information. When establishing a communication path between the communication terminal 10 and the first PDN 40, the control device 30 authenticates the first subscriber information and establishes a communication path between the communication terminal 10 and the first PDN 40. . Therefore, the first subscriber information is already authenticated. On the other hand, since the second subscriber information may not be authenticated, the communication unit 12 authenticates the second subscriber information and establishes a communication path with the second PDN 41. Is set (included) in the connection request and transmitted to the control device 30.

  The communication control unit 13 receives the connection completion indicating that the establishment of the communication path with the second PDN 41 is completed using the second subscriber information, and the communication control unit 13 communicates with the second PDN 41. Establish a communication path.

The control device 30 includes a communication unit 31, a determination unit 32, and a communication establishment unit 33.
The communication unit 31 receives data transmitted from the communication unit 12 of the communication terminal 10. Specifically, the communication unit 31 receives a connection request and second subscriber information from the communication unit 12.
The determination unit 32 determines whether the re-authentication flag is included in the connection request received by the communication unit 31.
If the determination unit 32 determines that the re-authentication flag is included in the connection request, the communication establishment unit 33 authenticates the second subscriber information and uses the second subscriber information to perform the second PDN 41. The communication path between the communication terminal 10 and the second PDN 41 is established by transmitting to the communication terminal 10 a connection completion for notifying the establishment of the communication path.

  As described above, when the communication terminal 10 uses the second subscriber information different from the first subscriber information to establish the communication path with the second PDN 41, the communication terminal 10 includes the re-authentication flag in the connection request. To send. The control device 30 recognizes that a communication path establishment request is made using second subscriber information different from the first subscriber information by determining whether the re-authentication flag is included in the connection request. Can do. Then, the communication terminal 10 and the control device 30 can establish a communication path with the second PDN 41 using the second subscriber information. As a result, communication paths with a plurality of PDNs can be established using different subscriber information. Therefore, it is possible to manage a plurality of communication paths with a plurality of packet communication networks using the communication terminal 10 and a plurality of subscriber information.

  In the first embodiment, the first PDN 40 and the second PDN 41 are described as separate PDNs, but the first PDN 40 and the second PDN 41 may be the same. That is, a communication path between the first PDN 40 or the second PDN 41, which is the same PDN, and the communication terminal 10 may be established using second subscriber information different from the first subscriber information.

(Embodiment 2)
Next, the second embodiment will be described. Before the details of the second embodiment are described, the problem items are organized again while explaining the details of the problem items. First, a configuration example of a communication system according to the second embodiment and subject matters will be described. FIG. 2 is a diagram illustrating a configuration example of the communication system 100. A communication system 100 illustrated in FIG. 2 is a communication system that supports LTE as a wireless communication method.

  As illustrated in FIG. 2, the communication system 100 includes a UE (User Equipment) 50, an eNodeB (evolved NodeB) 51, and an LTE core network 101. The LTE core network 101 includes an EPC network 102, an IMS network 103, an Internet network 104, another IP network 105, an HSS (Home Subscriber Server) 55, an existing telephone network 61, and another IMS network 62. The EPC network 102 includes an MME (Mobility Management Entity) 52, an SGW (Serving Gateway) 53, and a PGW (Packet Data Network) 54. The IMS network 103 includes an AS (Application Server) 56, an S-CSCF (Serving Call / Session Control Function) 57, an MGCF (Media Gateway Controller Function) 58, a P-CSCF (Proxy Call / Session Control Function) 59, and an I-CSCF. (Interrogating Call / Session Control Function) 60 is provided.

  The UE 50 corresponds to the communication terminal 10 in FIG. UE is a term used as a generic term for communication terminals in 3GPP, and UE may be replaced with MS (Mobile Station). The eNodeB 51 corresponds to the base station 20 in FIG. 1 and is a radio base station defined in 3GPP. The LTE-compatible base station is referred to as eNodeB or eNB.

  The LTE core network 101 is a network including higher-level devices than the eNodeB 51 in the LTE communication network. The EPC network 102 is a network configured by an MME 52, an SGW 53, and a PGW 54 described later. The IMS network 103 is a network that handles voice calls and SMS data. The Internet network 104 is a network that further connects networks together. The other IP network 105 is an IP network provided by another telecommunications carrier different from the telecommunications carrier that provides the LTE core network 101.

  IMS network (network) 103, Internet network 104, and other IP network 105 are each referred to as a packet communication network (PDN). Any one of the IMS network 103, the Internet network 104, and the other IP network 105 corresponds to the first PDN 40 in FIG. 1, and the other network corresponds to the second PDN 41. In the following description including the present embodiment, for convenience of explanation, it is assumed that the Internet network 104 corresponds to the first PDN 40 in FIG. 1, and the IMS network 103 corresponds to 21 in FIG. I will explain as a thing.

  The MME 52 corresponds to the control device 30 in FIG. The MME 52 is a control device that communicates with the UE 50, the eNodeB 51, the S-GW 53, the P-GW 54, and the HSS 55 and processes control signals. The MME 52 is a node that executes mobility management, session management, and the like regarding the UE 50.

  The SGW 53 and the PGW 54 are gateway devices that relay data transmitted between the UE 50, the IMS network 103, the Internet network 104, and the other IP network 105. The HSS 55 is a node that manages subscriber information related to the UE 50, that is, a subscriber information management device.

  The AS 56 is a service providing server in the IMS network 103. The S-CSCF 57 is called a SIP server for user authentication and session management, and is a SIP server that performs session control of the terminal and user authentication. The MGCF 58 is connected to the existing telephone network 61 and is called an existing telephone network connection gateway, and converts a call control protocol between SIP and ISUP (ISDN (Integrated Services Digital Network) User Part). The P-CSCF 59 is called an EPC-IMS network connection gateway SIP server, and is a SIP relay server arranged at a connection point with the EPC network 102. The I-CSCF 60 is called a gateway SIP server for another network connection, and is the first gateway SIP server connected from another network at the time of mutual connection / roaming, and relays the specification and signal of the S-CSCF.

Next, a communication path establishment procedure between the UE 50, the Internet network 104, and the IMS network 103 according to a related technique as disclosed in Patent Document 1 will be described with reference to FIGS.
First, the communication path establishment procedure with the first PDN (default PDN) will be described using the subscriber information stored in the SIM card attached to the UE 50 with reference to FIG. FIG. 3 is a sequence diagram showing a communication path establishment procedure between the UE 50 and the default PDN. In the present embodiment, since the Internet network 104 is the first PDN (default PDN), FIG. 3 is a sequence diagram showing a communication path establishment procedure between the UE 50 and the Internet network 104.

  First, when UE50 starts communication, terminal registration (Attach) is first performed with respect to eNodeB51. In terminal registration, the UE 50 needs to establish an RRC (Radio Resource Control) connection with the eNodeB 51. The RRC connection is a basic communication layer for the LTE terminal (UE 50) to communicate with the eNodeB 51. Specifically, the UE 50 performs an Attach request procedure with the eNodeB 51 (step S1). Then, the UE 50 transmits an RRC connection process start signal to the eNodeB 51 (Step S2), and the eNodeB 51 transmits an attach request to the MME 52 (Step S3).

  Next, the UE 50 exchanges a NAS (Non Access Stratum) message with the MME 52 via the eNodeB 51 by the RRC layer. Specifically, the UE 50 delivers terminal information related to the UE 50 including subscriber information to and from the MME 52 via the eNodeB 51 using the NAS message (step S4).

  Next, the MME 52 exchanges subscriber information including the IMSI received from the HSS 55 and the UE 50, and authenticates the connection of the UE 50. Specifically, the MME 52 authenticates the HSS 55 and the terminal information using the terminal information related to the UE 50 including subscriber information such as IMSI received from the UE 50 (step S5). Thereafter, the MME 52 performs NAS communication concealment with the UE 50 (step S6), and transfers APN information (step S7). And MME52 performs position registration of UE50 with respect to HSS55 (Step S8).

  Next, the MME 52 sets a communication path with the Internet network 104 (default PDN). Specifically, the MME 52 transmits a session creation request to the SGW 53 (Step 9). Next, a session is created between the SGW 53, the PGW 54, and the Internet network 104 (Step 10). In FIG. 3, it is described that a session is created in the Internet network 104 and the PGW 54. Specifically, the PGW 54 is connected to a GW (Gateway) device (not shown) connected to the Internet network 104. Session creation is performed.

  Then, the UE 50 establishes a packet communication session with the default PDN upon completion of terminal registration (Attach). Specifically, when the communication path with the Internet network 104 is established, the SGW 53 notifies the MME 52 of completion of session creation (step S11). Thereafter, the MME 52 transmits an attach permission to the eNodeB 51 (step S12). And eNodeB51 performs terminal capability confirmation about whether it can respond to multi-cluster communication and carrier aggregation communication, for example with UE50 (step S13). After that, the NodeB 51 performs RRC communication concealment with the UE 50 (Step S14), and performs RRC reconnection processing (Step S15). When the RRC reconnection process is completed, the UE 50 transmits an attach completion message to the MME 52 (step S16). Thereafter, packet communication is started between the UE 50 and the Internet network 104. That is, a communication path is established between the UE 50 and the Internet network 104 that is the first PDN (default PDN).

  Next, the procedure in which the UE 50 establishes a communication path with the second PDN will be described using FIG. The second PDN will be described as the IMS network 103. FIG. 4 is a sequence diagram illustrating a procedure for establishing a communication path between the UE 50 and the IMS network 103.

  FIG. 4 is a procedure executed after the procedure of FIG. 3 is completed. For this reason, as described in the first arrow portion in the sequence diagram of FIG. That is, the subscriber information of the UE 50 is authenticated, and the communication path between the UE 50 and the first PDN is established using the subscriber information.

  First, the UE 50 transmits a PDN connection request (PDN Connectivity Request), which is a request for establishing a communication path with the IMS network 103, to the MME 52 using the NAS message (step S21). The PDN connection request corresponds to the connection request in the first embodiment. The MME 52 determines whether there is no problem with the PDN connection request, and when determining that there is no problem with the PDN connection request, the MME 52 instructs the SGW 53 and the PGW 54 to create a session as in the attach process (step S22). ). Thereafter, session creation is performed between the SGW 53, the PGW 54, and the IMS network 103 (step S23), the SGW 53 notifies the MME 52 of completion of session creation (step S24), and the MME 52 transmits a PDN connection permission to the eNodeB 51. (Step S25). The eNodeB 51 performs RRC reconnection processing with the UE (step S26), and the UE 50 transmits a PDN connection completion to the MME 52 (step S27), thereby starting packet communication between the UE 50 and the IMS network 103. The That is, finally, the UE 50 can communicate with the IMS network 103 which is a desired PDN, and a communication path between the UE 50 and the IMS network 103 is established.

  When the MME 52 receives the PDN connection request in the process shown in FIG. 4, the MME 52 holds the terminal information of the UE 50 obtained as part of the attach process, so the terminal (subscriber information) authentication process is performed again. Not performed. Then, the MME 52 determines whether or not the subscriber information can be connected to the designated PDN. If there is no problem, the MME 52 creates a communication session with the PDN.

  In these connection sequences, when the UE 50 establishes a communication path with the PDN, PDN connection authentication processing is performed from two pieces of information, that is, subscriber information exchanged during terminal registration (Attach) and APN information of the PDN to be connected. Yes. This means that the terminal information notified to the PDN side is nothing but the subscriber information used at the time of terminal registration. In other words, a plurality of PDN connections that can be established by LTE communication are determined to be connectable by one subscriber information, and there is a problem that other subscriber information cannot intervene in a communication session established by attachment. Arise.

  Note that, for example, two SIM cards may be attached to one UE 50. However, in general, the first SIM card is a 3G communication SIM card, and the second SIM card is a case where the wireless communication system is different like a LTE communication SIM card. Alternatively, it is conceivable that both of the two SIM cards are for LTE communication. In this case, when the second SIM card is used, it is necessary to disconnect the communication of the first SIM card. That is, a plurality of communication paths cannot be established simultaneously using two SIM cards that support the same wireless communication method. That is, the above-mentioned problem matter arises.

  Here, in recent years, mobile routers are communication terminals that are currently widely used as portable communication terminals. A mobile router (wireless communication relay device) has a function of connecting to an Internet network through a mobile wireless communication network such as LTE, etc., and using this as an upper communication line, a portable Internet using a wireless LAN access point function as an interface It is a gateway device. The original purpose of the mobile router is to provide a means for communicating with a network regardless of location for an information processing terminal (communication terminal) that does not have a mobile wireless communication function. However, in recent years, communication terminals having mobile wireless communication functions such as smartphones and mobile phones can be connected to the Internet through a wireless interface such as a wireless LAN other than a WAN (Wide Area Network) connection interface. . Therefore, rather than the purpose of the mobile router, the aspect of being able to consolidate communication of a plurality of information processing terminals including data communication such as a mobile phone into a single mobile radio communication terminal has become deeper. In addition, as advantages on the base station management side, reduction of the number of accommodated cells and suppression of call bandwidth consumption by separating radio communication resources and data communication resources for calls can be expected.

  When communication of a plurality of information processing terminals including data communication such as a mobile phone is to be aggregated into a single mobile radio communication terminal, a plurality of communication paths with a plurality of PDNs using a plurality of subscriber information Want to manage. However, as described above, when the UE 50 establishes communication paths with a plurality of PDNs, a plurality of subscriber information cannot be interposed. Therefore, in the present embodiment, for example, an object of the present invention is to solve the above-described problems in a case where communication of a plurality of communication terminals is to be concentrated on one mobile router.

  Now, the second embodiment will be described. A configuration example of the communication system 100 according to the second embodiment will be described. FIG. 5 is a configuration diagram illustrating an outline of a configuration example of the communication system 100 according to the present embodiment. A configuration example on the network side of the communication system 100 according to the present embodiment is as described with reference to FIG. FIG. 5 is a configuration diagram embodying the configuration of the communication terminal (UE) side of the communication system 100 according to the present embodiment. For this reason, the communication system 100 shown in FIG. 5 is described with the configuration on the network side omitted.

  As shown in FIG. 5, the communication system 100 according to the present embodiment includes a plurality of UEs 70_1, 70_2, 50, eNodeB 51, EPC network 102, IMS network 103, Internet network 104, and other IP network 105.

  UE50, UE70_1 and 70_2 may be a mobile phone terminal, a smart phone terminal, a tablet terminal, a mobile router, a personal computer device, a mobile router (communication relay device), or the like. The UE 50 corresponds to the communication terminal 10 in FIG. In the present embodiment, UE 50 is described as a mobile router (wireless communication relay device). Moreover, in this Embodiment, UE50 describes as a mobile router corresponding to LTE. However, the UE 50 is not limited to a mobile router, and a communication line included in the mobile router may be a communication line communication device compatible with a future wireless communication method such as LTE advance or 5G.

Although UE70_1 and 70_2 should just be communication terminals quoted above, in this Embodiment, UE70_1 and 70_2 are described as a communication terminal corresponding to wireless LAN and LTE communication. It is assumed that UE 70_1 and UE 70_2 are set in advance to enable wireless LAN connection with UE 50. Further, it is assumed that UE 70_1 and UE 70_2 are already connected to UE 50 and belong to UE 50.
Since the eNodeB 51, the EPC network 102, the IMS network 103, the Internet network 104, and the other IP network 105 have the same configuration as in FIG. 2, description thereof is omitted.

  Next, a configuration example of each device in the communication system 100 will be described with reference to FIG. FIG. 6 is a configuration diagram illustrating a configuration example of the communication system 100 according to the present embodiment. As shown in FIG. 6, the communication system 100 includes UE 70, UE 50, eNodeB 51, MME 52, SGW 53, PGW 54, HSS 55, Internet network 104, and IMS network 103. In addition, about the content which overlaps with the content demonstrated above, description is abbreviate | omitted suitably and demonstrated.

  In FIG. 2, the communication system 100 is configured to include a plurality of eNodeBs 51. However, for the sake of explanation, the communication system 100 will be described as a single eNodeB. In FIG. 2, the communication system 100 is described so that the LTE core network 101 includes a plurality of devices (nodes), but only devices (nodes) related to the present embodiment are described. Further, in FIG. 2 and FIG. 5, it is described as a configuration including three PDNs, but for description, it is described as two PDNs for convenience. Specifically, it is described as a configuration including the Internet network 104 and the IMS network 103. In the description, it is assumed that the Internet network 104 is the first PDN in FIG. 1, that is, the default PDN, and the IMS network 103 is the second PDN in FIG. Furthermore, although a plurality of UEs 70 (UE 70_1 and UE 70_2) are shown in FIG. 5, for the sake of convenience, the description will be made assuming that one UE 70 is provided in FIG. However, the present invention is not limited to this configuration, and a plurality of devices such as UEs and eNodeBs may be provided.

Next, a configuration example of the UE 50 will be described. The UE 50 includes a communication unit 12, a control unit 502, a communication unit 14, a mounting unit 15, an antenna ANT1, and an antenna ANT2.
The communication unit 12 corresponds to the communication unit 12 in the first embodiment. The communication unit 12 is an LTE communication interface. The communication unit 12 performs signal modulation / demodulation processing, and performs wireless communication with the eNodeB 51 via the antenna ANT1. The communication unit 12 communicates with the LTE core network 101 such as the MME 52 via the eNodeB 51. In the first embodiment, the communication unit 12 is described as transmitting the second subscriber information at the time of the connection request. However, in the present embodiment, the communication unit 12 is connected to the MME 52. Send a request. The communication unit 12 receives the subscriber information request, which is a subscriber information request signal, from the MME 52, and transmits the second subscriber information when responding to the subscriber information request. That is, the second subscriber information is transmitted in the subscriber information transmission which is a response signal for the subscriber information request.

  The control unit 502 performs control to establish a communication path with the first PDN and the second PDN. The control unit 502 provides a communication path for packet communication within the apparatus. The control unit 502 determines the contents of communication packets transmitted and received from the communication unit 12 and the communication unit 14 and appropriately determines the destination of the packet. Controls packet relay to another network. In addition, the control unit 502 acquires subscriber information stored in a SIM card mounted on the mounting unit 15 to be described later, and performs authentication processing and wireless control necessary when the LTE communication interface 501 connects to the LTE network. Perform processing to perform the operation.

  The communication unit 14 is an interface for communicating with the UE 70 described later via the antenna ANT2. As described above, UE 70 is assumed to be a wireless LAN compatible terminal in the present embodiment, and therefore communication unit 14 modulates and demodulates communication data based on the wireless communication standard defined by IEEE 802.11. The communication unit 14 is a communication unit that acts as a wireless LAN base unit (AP: Access Point) by transmitting and receiving radio waves to and from other IEEE 802.11-compliant communication devices such as the UE 70 through the antenna ANT2. The communication unit 14 receives a connection request for requesting establishment of a communication path with the packet communication network using the second subscriber information from the UE 70. The communication unit 14 transmits a subscriber information request from the MME 52 to the UE 70, and receives subscriber information transmission that is a response signal to the subscriber information request.

  The control unit 502 includes an acquisition unit 11 and a communication control unit 13. The acquisition unit 11 acquires first subscriber information stored in a SIM card mounted on the mounting unit 15 described later. Moreover, the acquisition part 11 acquires the 2nd subscriber information memorize | stored in the SIM card with which UE70 was mounted | worn from the subscriber information transmission received from UE70 mentioned later.

  Using the subscriber information acquired by the acquisition unit 11, the communication control unit 13 performs processing for performing operations such as authentication processing and radio control necessary when the LTE communication interface 501 connects to the LTE network. The communication control unit 13 determines the contents of communication packets transmitted from the wireless LAN interface (AP) 503 and the LTE communication interface 501, and appropriately controls the packet destination to perform packet relay to another network. . In addition, the communication control unit 13 establishes a communication path between the UE 50 and the IMS network 103, and transmits a PDN connection completion to the UE 70, thereby controlling the UE 70 to establish a communication path with the IMS network 103. Do.

  The mounting unit 15 has a function of a SIM connection interface, and has a function of mounting a subscriber identification (SIM) card for connecting to a mobile communication network. The mounting unit 15 has a function of communicating with the mounted SIM card. The mounting unit 15 communicates with the SIM card, and the acquisition unit 11 described later acquires subscriber information stored in the SIM card. In the present embodiment, description will be made assuming that a SIM card is inserted into the mounting unit 15. The subscriber information stored in the SIM card will be described as first subscriber information. In FIG. 6, it is described that only one mounting portion 15 is provided, but a plurality of mounting portions 15 may be provided. That is, a plurality of SIM cards may be mounted, and subscriber information stored in the SIM card may be read.

Next, a configuration example of the MME 52 will be described. The MME 52 includes a communication unit 31, a determination unit 32, and a communication establishment unit 33.
In the first embodiment, the communication unit 31 is configured to receive the connection request and the second subscriber information when receiving the connection request from the communication terminal 10, but in the present embodiment, the UE 50 First, a connection request is received. Then, the determination unit 32 determines whether or not the re-authentication flag is included in the connection request. If the re-authentication flag is included, the communication unit 31 requests the UE 50 to request the second subscriber information. A user information request. Then, 2nd subscriber information is acquired by receiving subscriber information transmission from UE50.
Since the determination unit 32 and the communication establishment unit 33 have the same configuration as that of the first embodiment, description thereof is omitted.

  Subsequently, a configuration example of the UE 70 will be described. The UE 70 includes an antenna ANT3, a mounting unit 71, a communication unit 72, a control unit 702, a data processing unit 76, and a call processing unit 77.

  The mounting unit 71 has a function of mounting a subscriber identification (SIM) card for connecting to a mobile communication network and communicating with the mounted SIM card, and an acquisition unit 74 described later is stored in the SIM card. Get subscriber information. In the present embodiment, a description will be given assuming that a SIM card is inserted into the mounting portion 71. The subscriber information stored in the SIM card will be described as second subscriber information. In FIG. 6, it is described that only one mounting portion 71 is provided, but a plurality of mounting portions 71 may be provided. That is, a plurality of SIM cards may be mounted, and subscriber information stored in the SIM card may be read.

  The communication unit 72 modulates and demodulates communication data based on a wireless communication standard defined by IEEE 802.11, and transmits / receives a wireless signal to / from the communication unit 14 of the UE 50 that is another IEEE 802.11 compliant device through the antenna ANT3. It behaves as a wireless LAN slave (STA). That is, the communication unit 72 can also be said to be a wireless LAN interface (STA).

  The communication unit 72 transmits an establishment request signal for requesting establishment of the data communication network to the UE 50 using the second subscriber information acquired by the acquisition unit 74 described later and the second subscriber information. The communication unit 72 receives from the UE 50 a subscriber information request signal that requests transmission of subscriber information attached to the UE 70. Moreover, the communication part 72 transmits / receives a signal required for communication with UE50.

  The control unit 702 provides a communication path as packet communication within the apparatus. In addition, the control unit 702 selects a communication path between the data processing unit 76 and the call processing unit 77 described later for the communication packet communicated by the communication unit 72. Further, the control unit 702 acquires subscriber information stored in the SIM card attached to the attachment unit 71. In addition, the control unit 702 performs control for transmitting the acquired subscriber information to the UE 50 via the other acquisition unit or the communication unit 72. The data processing unit 76 processes a data packet to be communicated. The call processing unit 77 processes a data packet related to a call for making a call.

The control unit 702 includes an acquisition unit 74 and a communication control unit 75. The acquisition unit 74 acquires second subscriber information stored in the SIM card attached to the attachment unit 71.
The communication control unit 75 provides a communication path as packet communication within the apparatus. The communication control unit 75 selects a communication path between the data processing unit 76 and the call processing unit 77 for the communication packet communicated by the communication unit 72. In addition, the communication control unit 75 performs control for transmitting the second subscriber information acquired by the acquisition unit 74 to the UE 50 via the other acquisition unit or the communication unit 72.

  Next, an operation example in the communication system 100 according to the present embodiment will be described with reference to FIG. FIG. 7 is a sequence diagram showing an operation example in the communication system 100 according to the present embodiment. Specifically, FIG. 7 is a sequence diagram illustrating a procedure for establishing a communication path between the UE 50 and the UE 70 and the IMS network 103, which is the second PDN, using the second subscriber information.

First, as a premise, the UE 70 belongs to the communication unit 14 included in the UE 50 using the communication unit 72. That is, as shown in FIG. 7, the UE 70 is in a state where the UE 50 belongs to the wireless LAN.
Further, in the UE 50, the acquisition unit 11 acquires the first subscriber information from the subscriber identification (SIM) card attached to the attachment unit 15. The UE 50 has already registered the terminal in the LTE core network 101 using the first subscriber information and can be connected to the Internet (that is, the communication path with the Internet network 104 has been established). ) And communication for control with the LTE core network 101 is possible. That is, as shown in FIG. 7, the UE 50 is in an attached state and is in a connection state (a state where a communication path has been established) with the Internet network 104, which is a default PDN. The terminal registration procedure using the first subscriber information is performed according to the procedure shown in FIG. That is, FIG. 7 can be said to be a sequence diagram after the procedure of FIG. 3 is performed.

  Returning to FIG. 7, a procedure for establishing a communication path between the UE 50 and the UE 70 and the IMS network 103, which is the second PDN, using the second subscriber information will be described. When the UE 70 establishes a communication path between the call processing unit 77 and the IMS network 103 in order to make a call, the communication control unit 75 receives a request for establishing a communication path from the call processing unit 77, and the communication unit 72 Send a request to First, the communication unit 72 transmits an IMS connection request to the UE 50 (step S31). The UE 50 receives the IMS connection request at the communication unit 14. And the communication control part 13 of UE50 performs the concealment process of communication with UE70 by IPsec (Security Architecture for the Internet Protocol) etc., for example, and establishes the communication session used for communication (step S32).

  Next, the UE 70 transmits a PDN connection request from the communication unit 72, and the UE 50 receives the PDN connection request at the communication unit 14 (step S33). In the UE 50, the communication control unit 13 relays the received PDN connection request, and transmits the request from the communication unit 12 to the MME 52 via the eNodeB 51 (step S34). At this time, the communication unit 12 of the UE 50 uses a NAS message called PDN Connectivity Request to send a PDN connection request message to the MME 52. A re-authentication flag that indicates the necessity of re-authentication is included in the NAS message. Set (include) and send. The communication unit 31 of the MME 52 receives the message. Note that the PDN connection request and the PDN connectivity request in the present embodiment correspond to the connection request in the first embodiment. Further, the PDN connection request and the PDN Connectivity Request from the UE 50 to the MME 52 can also be referred to as a first connection request, and the PDN connection request and the PDN Connectivity Request from the UE 70 to the UE 50 can also be referred to as a second connection request.

  The MME 52 determines whether or not the re-authentication flag is set in the PDN Connectivity Request, and if re-authentication is required, the MME 52 requests subscriber information from the UE 50 (step S35). Specifically, the determination unit 32 of the MME 52 determines whether the re-authentication flag is set in the received PDN Connectivity Request. When the determination unit 32 determines that the re-authentication flag is set in the PDN Connectivity Request, the communication unit 31 transmits a subscriber information request signal that is a request signal for subscriber information.

UE50 receives the said signal in the communication part 12, and transmits to UE70 from the communication part 14 via the communication control part 13 (step S36). At this time, a signal transmitted from the communication unit 14 is transmitted to the UE 70 through a communication session created in advance by the communication control unit 13.
When the UE 70 receives the subscriber information request signal at the communication unit 72, the acquisition unit 74 communicates with the SIM card attached to the attachment unit 71, and obtains the second subscriber information stored in the SIM card. get. And UE70 returns the 2nd subscriber information acquired from the communication part 72 to UE50 as a subscriber information transmission signal (step S37).

UE50 receives the 2nd subscriber information transmitted from UE70 by the communication part 14, and the acquisition part 11 acquires 2nd subscriber information from a subscriber information transmission signal. And UE50 transmits the acquired 2nd subscriber information to MME52 from the communication part 12 (step S38).
The MME 52 receives the second subscriber information transmitted from the communication unit 12 of the UE 50 at the communication unit 31, and the communication establishment unit 33 authenticates with the HSS 55 using the received second subscriber information. If there is no problem, position registration is performed (step S40).

  Thereafter, steps S22 to S27 of the communication path establishment procedure shown in FIG. 5 are performed, and the communication establishing unit 33 establishes a communication session between the UE 50 and the IMS network 103 (IMS-PDN). As a result, the UE 50 completes the PDN connection with the IMS network 103 using the second subscriber information stored in the SIM card attached to the UE 70.

  The communication control unit 13 of the UE 50 receives the establishment of the communication path (session) with the IMS network 103, notifies the UE 70 of the completion of connection to the PDN together with the identification information of the gateway (not shown) of the IMS network 103, Control for establishing a communication path with the IMS network 103 is performed (step S41). Specifically, the UE 70 performs a designated tunneling process for concealment on the IP address notified by the UE 50, and establishes a communication path between the UE 70 and the IMS network 103.

  According to the communication system 100 according to the second embodiment, by executing the sequence described above, the UE 50 obtains the second subscriber information stored in the subscriber identification (SIM) card attached to the UE 70. By using this, a communication path between the UE 70 and the IMS network 103 can be established. Further, the UE 70 can communicate with the IMS network 103 via the UE 50 through the communication session that maintains the line quality determined by the mobile communication carrier by the LTE communication of the UE 50. The function can be used. That is, a single LTE terminal (UE 50) can establish a communication path to a PDN having different required authentication information using a plurality of subscriber information, and the UE 50 can perform a plurality of communication with a packet communication network. It is possible to manage the road.

  Further, the UE 50 according to the second embodiment is, for example, a mobile router as described above. Therefore, for example, a user of the UE 50 and the UE 70 performs data communication using the UE 50, and the UE 70 such as a smartphone that is making a call using its own LTE communication can also perform a call communication path on the UE 50 side. . Therefore, the effect that the UE 70 side can reduce power consumption required for waiting for a call can also be expected.

  In FIG. 8, the procedure for establishing the communication path between the IMS network 103, which is a different PDN from the already established Internet network 104, and the UE 50 and UE 70 has been described. However, the same PDN is attached to the UE 70. The communication path establishment procedure may be performed using the second subscriber information stored in the SIM card. That is, for example, when the communication path between the IMS network 103 and the UE 50 is already established, the above procedure is included in the procedure for establishing the communication path with the IMS network 103 using the second subscriber information of the UE 70. May be applied. As a result, one LTE terminal can establish a PDN connection using different authentication information for one PDN using a plurality of subscriber information. Therefore, according to the communication system 100 according to the second embodiment, for example, when a voice call such as VoLTE is performed, a communication path (bearer) for PDN connection can be divided, and quality control is performed for each call individually. The effect of contract management can be expected. Furthermore, since each call can be individually managed for quality control and contract management, not only bandwidth management, such as raising the priority of voice communication channels over data communication, but also management of communication channels between voice calls can be performed. Even more efficient management is possible.

  In the present embodiment, the communication between the UE 50 and the UE 70 has been described as communication using a wireless LAN, but it is naturally not limited thereto. The communication between the UE 50 and the UE 70 is only required to be IP communication, and may be, for example, Bluetooth (registered trademark) or Ethernet (registered trademark). In FIG. 7, the UE 70 does not describe a communication interface for performing LTE communication. However, the UE 70 is not intended to be limited to this configuration, and is described for convenience of explanation. Omitted. Therefore, the UE 70 may be configured to directly perform LTE communication without using the UE 50.

(Embodiment 3)
Subsequently, Embodiment 3 will be described. In the third embodiment, the UE 50 includes the mounting unit 15 and the UE 70 includes the mounting unit 71. However, in the fourth embodiment, one UE includes a plurality of mounting units. That is, the UE 70 does not exist. In addition, in this Embodiment, since it is the same as that of Embodiment 3 except the structure of UE, only the structural example of UE shall be demonstrated.

  Next, a configuration example of the UE 50 according to the present embodiment will be described. FIG. 8 is a configuration diagram illustrating a configuration example of the UE 50 according to the present embodiment. First, regarding the configuration example of the UE 50, differences from the UE 50 according to the third embodiment will be described. The UE 50 according to the third embodiment includes the communication unit 14, but the UE 50 according to the fourth embodiment has a configuration that does not include the communication unit 14. Accordingly, the antenna ANT2 is not included. Instead, the UE 50 according to the present embodiment includes a data processing unit 22 and a call processing unit 23. Further, in Embodiment 3, the UE 50 is configured to include one of the mounting sections 15, but in this embodiment, the UE 50 includes the mounting section (first mounting section) 15 and the mounting section (first mounting section). 2 mounting portions) 21. In addition, in FIG. 8, although UE50 describes as a structure provided with two mounting parts, the structure provided with three or more may be sufficient.

A configuration example of the UE 50 will be described with reference to FIG. The UE 50 includes a first mounting unit 15, a second mounting unit 21, a communication unit 12, a control unit 502, a data processing unit 22, and a call processing unit 23.
The first mounting unit 15 corresponds to the mounting unit 15 in the second embodiment, has a function of mounting a SIM card, and communicates with the SIM card mounted on the first mounting unit 15.
The second mounting unit 21 has a function of mounting a SIM card, and communicates with the SIM card mounted on the second mounting unit 21.

The communication unit 12 has the same configuration as that of the communication unit 12 in the second embodiment, and a description thereof will be omitted.
The control unit 502 provides a communication path as packet communication within the apparatus. In addition, the control unit 502 selects a communication path between the data processing unit 22 and the call processing unit 23, which will be described later, for the communication packet communicated by the LTE communication interface 501. In addition, the control unit 502 acquires subscriber information stored in the SIM card mounted on the first mounting unit 15 and the second mounting unit 21, and when the communication unit 12 connects to the LTE core network 101. Performs necessary authentication processing and processing for performing operations such as wireless control. In addition, the control unit 502 performs control for transmitting the acquired subscriber information to the MME 52 via the other acquisition unit or communication unit 12 and the eNodeB 51. The data processing unit 22 processes data to be communicated. The call processing unit 23 processes data related to a call for making a call.

  The control unit 502 includes an acquisition unit 11 and a communication control unit 13. The acquisition unit 11 acquires subscriber information stored in the SIM card mounted on the first mounting unit 15 and the second mounting unit 21. The subscriber information acquired from the SIM card mounted on the first mounting unit 15 is the first subscriber information, and the subscriber information acquired from the SIM card mounted on the second mounting unit 21 is the second subscriber information. Subscriber information. When acquiring the second subscriber information, the acquiring unit 11 requests the communication unit 12 to establish a second communication path with the packet communication network using the acquired second subscriber information.

  The communication control unit 13 establishes a communication path between the UE 50 and the IMS network 103. The communication control unit 13 provides a communication path as packet communication within the apparatus. In addition, the communication control unit 13 selects a communication path between the data processing unit 22 (to be described later) and the call processing unit 23 (to be described later) from the communication packet transmitted / received by the communication unit 12 to / from the MME 52 via the eNodeB 51, and the communication packet is appropriately set. It is transmitted to the processing unit that can process. Further, the communication control unit 13 uses the acquired first subscriber information and second subscriber information to perform operations such as authentication processing and radio control necessary when the communication unit 12 connects to the LTE core network 101. Perform the process to do. In addition, the communication control unit 13 performs control for transmitting the acquired subscriber information to the MME 52 via the other acquisition unit or the LTE wireless communication interface 510 and the eNodeB 51.

  Next, an operation example of the communication system 100 according to the third embodiment will be described with reference to FIG. FIG. 9 is a sequence diagram illustrating an operation example of the communication system 100 according to the third embodiment. As a premise, in the UE 50, the acquisition unit 11 acquires the first subscriber information from the SIM card mounted on the first mounting unit 15. Then, the UE 50 has already registered the terminal in the LTE core network 101 using the first subscriber information, can be connected to the Internet, and can communicate with the LTE core network 101 for control. Suppose that it is in a state. That is, the communication path establishment procedure shown in FIG. 3 has been performed. As shown in FIG. 9, the UE 50 is in an attached state and is connected to the Internet network 104, which is the default PDN (communication path has been established). State).

  UE50 transmits the message of a PDN connection request to MME52 to MME52 via eNodeB51 using the NAS message called PDN Connectivity Request from the communication part 12 (step S34). At this time, the communication unit 12 of the UE 50 sends a PDN connection request message to the MME 52 using a NAS message called PDN Connectivity Request, which is a PDN connection request, and a flag indicating the necessity of re-authentication in the NAS message. A certain re-authentication flag is set (including) and transmitted. The communication unit 31 of the MME 52 receives the message.

  The MME 52 determines whether or not the re-authentication flag is set in the PDN Connectivity Request, and if re-authentication is required, the MME 52 requests subscriber information from the UE 50 (step S35). Specifically, the determination unit 32 of the MME 52 determines whether the re-authentication flag is set in the received PDN Connectivity Request. When the determination unit 32 determines that the re-authentication flag is set in the PDN Connectivity Request, the communication unit 31 transmits a subscriber information request signal that is a request signal for subscriber information.

When the communication unit 12 of the UE 50 receives the subscriber information request signal, the acquisition unit 11 acquires the second subscriber information. And UE50 transmits the 2nd subscriber information acquired from the communication part 12 to MME52 (step S38).
The MME 52 receives the second subscriber information transmitted from the communication unit 12 of the UE 50 at the communication unit 31, and the communication establishment unit 33 authenticates with the HSS 55 using the received second subscriber information. If there is no problem, position registration is performed (step S40).

  Thereafter, steps S22 to S27 of the communication path establishment procedure shown in FIG. 5 are performed to establish a communication path between the UE 50 and the IMS network 103 (IMS-PDN). As a result, the UE 50 completes the PDN connection with the IMS network 103 using the second subscriber information stored in the SIM card mounted on the second mounting unit 21 of the UE 50.

  According to the communication system 100 according to the third embodiment, the UE 50 stores the second subscriber information stored in the SIM card attached to the second attachment unit 21 by executing the sequence described above. Use to establish a communication path with the second PDN. Therefore, one LTE terminal can establish a communication path to a PDN having different required authentication information using a plurality of subscriber information, and the UE 50 has a plurality of communication paths with a plurality of packet communication networks. Can be managed.

  In FIG. 9, the establishment procedure of the communication path between the IMS network 103, which is a different PDN from the already established Internet network 104, and the UE 50 and the UE 70 has been described. The communication path establishment procedure using the second subscriber information stored in the SIM card mounted on the second mounting unit 21 may be used. That is, for example, when the communication path between the IMS network 103 and the UE 50 has already been established, the UE 50 uses the second subscriber information to establish the communication path with the IMS network 103. May be applied. As a result, one LTE terminal can establish a PDN connection using different authentication information for one PDN using a plurality of subscriber information. Therefore, according to the communication system 100 according to the fourth embodiment, for example, when a voice call such as VoLTE is performed, a communication path (bearer) for PDN connection can be divided, and quality control is performed for each call individually. The effect of contract management can be expected. Furthermore, since each call can be individually managed for quality control and contract management, not only bandwidth management such as raising the priority of the voice communication channel (bearer) over data communication, but also the communication channel (bearer) between voice calls. ) Can be managed, and more efficient management is possible.

  In the above-described embodiment, each configuration has been described as a hardware configuration, but the present invention is not limited to this. Each configuration of the communication terminal 10, the control device 30, the UE 50, the UE 70, and the MME 52 can be realized by causing a CPU (Central Processing Unit) to execute a computer program.

  In the above example, the program can be stored and provided to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory), and various types of temporary programs. Computer-readable media may be provided to a computer by way of example, such as electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the first to third embodiments, the procedure for establishing the communication path with the second PDN using the second subscriber information is after the communication path with the first PDN is established. Of course, it is not limited to this. A procedure for establishing communication paths with the second PDN using the second subscriber information after establishing communication paths with all the PDNs using the first subscriber information may be used. In addition, after establishing a communication path with the first PDN using the first subscriber information and then establishing a communication path with the second PDN using the second subscriber information, It may be a procedure for establishing a communication channel with the second PDN using the first subscriber information. In addition, the present disclosure may be implemented by appropriately combining the respective embodiments.

Moreover, although a part or all of said embodiment can be described also as the following additional remarks, it is not restricted to the following.
(Appendix 1)
A communication system comprising a communication terminal and a control device,
Using the first subscriber information for connecting to the mobile communication network and establishing a first communication path with any of the one or more packet communication networks;
The communication terminal is
An acquisition unit for acquiring second subscriber information;
When requesting establishment of a second communication path with any one of the one or more packet communication networks using the second subscriber information, a re-authentication flag for requesting authentication of the second subscriber information is included. A first communication unit that transmits a connection request for setting a communication path and the second subscriber information to the control device;
A communication control unit configured to receive connection completion indicating that communication channel establishment is completed from the control device, and to establish the second communication channel using the second subscriber information;
With
The controller is
A second communication unit that receives the connection request and the second subscriber information from the communication terminal;
A determination unit for determining whether a re-authentication flag is included in the connection request;
If the re-authentication flag is included, the second subscriber information is authenticated, and the communication path with the packet communication network corresponding to the second communication path is set using the second subscriber information. A communication establishment unit for establishing and transmitting the connection completion to the communication terminal;
A communication system comprising:
(Appendix 2)
The first communication unit is
Receiving a subscriber information request for requesting second subscriber information used when establishing the second communication path from the control device;
In response to the subscriber information request, the second subscriber information acquired by the acquisition unit is transmitted to the control device,
The second communication unit is
If the re-authentication flag is included in the connection request, a subscriber information request for requesting second subscriber information is transmitted to the communication terminal,
Receiving the second subscriber information from the communication terminal in response to the subscriber information request;
The communication system according to attachment 1.
(Appendix 3)
The connection request is a first connection request,
The communication terminal is
A third communication unit configured to receive a second connection request for requesting establishment of the second communication path from another communication terminal and to transmit the subscriber information request received from the control device to the other communication terminal; Further comprising
The acquisition unit
Obtaining second subscriber information from a response signal of the subscriber information request from the other communication terminal;
The communication control unit
Receiving a connection completion from the control device to establish a communication path between the packet communication network corresponding to the second communication path and the other communication terminal;
The communication system according to attachment 2.
(Appendix 4)
The communication terminal is
A mounting section for mounting a subscriber identification card in which subscriber information is stored;
The acquisition unit
Obtaining second subscriber information from a subscriber identification card mounted on the mounting unit;
The communication system according to appendix 1 or 2.
(Appendix 5)
The communication establishment unit
If the re-authentication flag is included in the connection request, authentication of the second subscriber information with a subscriber information management device that stores subscriber information connectable to a mobile communication network; and Perform location registration of second subscriber information,
The communication system according to any one of appendices 1 to 4.
(Appendix 6)
Using the first subscriber information for connecting to the mobile communication network and establishing a first communication path with any of the one or more packet communication networks;
An acquisition unit for acquiring second subscriber information;
When requesting establishment of a second communication path with any one of the one or more packet communication networks using the second subscriber information, authentication of the second subscriber information is requested. A communication unit for transmitting a connection request for setting a communication path including a re-authentication flag and the second subscriber information to the control device;
A communication control unit that establishes the second communication path using the second subscriber information by receiving a connection completion from the control device;
A communication terminal comprising:
(Appendix 7)
The communication unit is
Receiving a subscriber information request for requesting second subscriber information used when establishing the second communication path from the control device;
In response to the subscriber information request from the control device, the second subscriber information acquired by the acquisition unit is transmitted to the control device;
The communication terminal according to attachment 6.
(Appendix 8)
When establishing a first communication path with any one of the one or more packet communication networks using the first subscriber information for connecting to the mobile communication network;
A communication unit that receives, from a communication terminal, a connection request for requesting establishment of a second communication path with any one of the one or more packet communication networks, and second subscriber information;
A determination unit for determining whether a re-authentication flag is included in the connection request;
If the re-authentication flag is included, the second subscriber information is authenticated, and the communication path with the packet communication network corresponding to the second communication path is set using the second subscriber information. A communication establishment unit to be established;
A control device comprising:
(Appendix 9)
A communication control method in a communication system comprising a communication terminal and a control device,
Using the first subscriber information for connecting to the mobile communication network and establishing a first communication path with any of the one or more packet communication networks;
The communication terminal is
Connection for setting a second communication path with any one of the one or more packet communication networks, including a re-authentication flag for requesting authentication of the second subscriber information using the second subscriber information Sending a request and the second subscriber information to the control device;
The controller is
Receiving the connection request and the second subscriber information from the communication terminal;
If the re-authentication flag is included in the connection request, authenticate the second subscriber information;
Using the second subscriber information to establish a communication path between the communication terminal and a packet communication network corresponding to a second communication path;
Communication control method.
(Appendix 10)
When establishing a first communication path with any one of the one or more packet communication networks using the first subscriber information for connecting to the mobile communication network,
Obtaining second subscriber information;
When requesting establishment of a second communication path with a packet communication network using the second subscriber information, a communication path including a re-authentication flag for requesting authentication of the second subscriber information is set. Transmitting a connection request for the second subscriber information to the control device;
Establishing the second communication path using the second subscriber information by receiving a connection completion from the control device;
Is a communication program that causes a communication terminal to execute.
(Appendix 11)
The communication unit is a first communication unit;
The connection request is a first connection request,
A second communication unit that receives a second connection request for requesting establishment of the second communication path from another communication terminal, and transmits the subscriber information request from the control device to the other communication terminal; Further comprising
The acquisition unit
Obtaining second subscriber information from the response signal of the subscriber information request from the other communication terminal;
The communication control unit
Receiving a connection completion from the control device to establish a communication path between the packet communication network corresponding to the second communication path and the other communication terminal;
The communication terminal according to appendix 7.
(Appendix 12)
A mounting section for mounting a subscriber identification card in which subscriber information is stored;
The acquisition unit
Obtaining second subscriber information from the subscriber identification card mounted on the mounting unit;
Using the acquired second subscriber information, request the communication unit to establish a second communication path with a packet communication network.
The communication terminal according to appendix 6 or 7.
(Appendix 13)
The communication unit is
If the re-authentication flag is included in the connection request, a subscriber information request for requesting second subscriber information is transmitted to the communication terminal,
Receiving the second subscriber information by a response signal of the subscriber information request;
The control device according to appendix 8.
(Appendix 14)
The communication establishment unit
When the re-authentication flag is included in the connection request, authentication of the second subscriber information with a subscriber information management device that stores subscriber information connectable to a mobile communication network; and 2. Register the location of subscriber information
The control device according to appendix 8 or 13.

DESCRIPTION OF SYMBOLS 1,100 Communication system 10 Communication terminal 11, 74 Acquisition part 12, 14, 31, 72 Communication part 13, 75 Communication control part 15, 21, 71 Mounting part 20 Base station 22, 76 Data processing part 23, 77 Call processing part 30 control device 32 determination unit 33 communication establishment unit 40 first PDN
41 Second PDN
51 eNodeB
52 MME
53 SGW
54 PGW
55 HSS
56 AS
57 S-CSCF
58 MGCF
59 P-CSCF
60 I-CSCF
61 Existing telephone network 62 Other IMS network 50, 70, 70_1, 70_2 UE
101 LTE Core Network 102 EPC Network 103 IMS Network 104 Internet Network 105 Other IP Network 502, 702 Control Unit

Claims (10)

A communication system comprising a communication terminal and a control device,
Using the first subscriber information for connecting to the mobile communication network and establishing a first communication path with any of the one or more packet communication networks;
The communication terminal is
An acquisition unit for acquiring second subscriber information;
When requesting establishment of a second communication path with any one of the one or more packet communication networks using the second subscriber information, a re-authentication flag for requesting authentication of the second subscriber information is included. A first communication unit that transmits a connection request for setting a communication path and the second subscriber information to the control device;
A communication control unit configured to receive connection completion indicating that communication channel establishment is completed from the control device, and to establish the second communication channel using the second subscriber information;
With
The controller is
A second communication unit that receives the connection request and the second subscriber information from the communication terminal;
A determination unit for determining whether a re-authentication flag is included in the connection request;
If the re-authentication flag is included, the second subscriber information is authenticated, and the communication path with the packet communication network corresponding to the second communication path is set using the second subscriber information. A communication establishment unit for establishing and transmitting the connection completion to the communication terminal;
A communication system comprising: The first communication unit is
Receiving a subscriber information request for requesting second subscriber information used when establishing the second communication path from the control device;
In response to the subscriber information request, the second subscriber information acquired by the acquisition unit is transmitted to the control device,
The second communication unit is
If the re-authentication flag is included in the connection request, a subscriber information request for requesting second subscriber information is transmitted to the communication terminal,
Receiving the second subscriber information from the communication terminal in response to the subscriber information request;
The communication system according to claim 1. The connection request is a first connection request,
The communication terminal is
A third communication unit configured to receive a second connection request for requesting establishment of the second communication path from another communication terminal and to transmit the subscriber information request received from the control device to the other communication terminal; Further comprising
The acquisition unit
Obtaining second subscriber information from a response signal of the subscriber information request from the other communication terminal;
The communication control unit
Receiving a connection completion from the control device to establish a communication path between the packet communication network corresponding to the second communication path and the other communication terminal;
The communication system according to claim 2. The communication terminal is
A mounting section for mounting a subscriber identification card in which subscriber information is stored;
The acquisition unit
Obtaining second subscriber information from a subscriber identification card mounted on the mounting unit;
The communication system according to claim 1 or 2. The communication establishment unit
If the re-authentication flag is included in the connection request, authentication of the second subscriber information with a subscriber information management device that stores subscriber information connectable to a mobile communication network; and Perform location registration of second subscriber information,
The communication system according to any one of claims 1 to 4. Using the first subscriber information for connecting to the mobile communication network and establishing a first communication path with any of the one or more packet communication networks;
An acquisition unit for acquiring second subscriber information;
When requesting establishment of a second communication path with any one of the one or more packet communication networks using the second subscriber information, authentication of the second subscriber information is requested. A communication unit for transmitting a connection request for setting a communication path including a re-authentication flag and the second subscriber information to the control device;
A communication control unit that establishes the second communication path using the second subscriber information by receiving a connection completion from the control device;
A communication terminal comprising: The communication unit is
Receiving a subscriber information request for requesting second subscriber information used when establishing the second communication path from the control device;
In response to the subscriber information request from the control device, the second subscriber information acquired by the acquisition unit is transmitted to the control device;
The communication terminal according to claim 6. When establishing a first communication path with any one of the one or more packet communication networks using the first subscriber information for connecting to the mobile communication network;
A communication unit that receives, from a communication terminal, a connection request for requesting establishment of a second communication path with any one of the one or more packet communication networks, and second subscriber information;
A determination unit for determining whether a re-authentication flag is included in the connection request;
If the re-authentication flag is included, the second subscriber information is authenticated, and the communication path with the packet communication network corresponding to the second communication path is set using the second subscriber information. A communication establishment unit to be established;
A control device comprising: A communication control method in a communication system comprising a communication terminal and a control device,
Using the first subscriber information for connecting to the mobile communication network and establishing a first communication path with any of the one or more packet communication networks;
The communication terminal is
Connection for setting a second communication path with any one of the one or more packet communication networks, including a re-authentication flag for requesting authentication of the second subscriber information using the second subscriber information Sending a request and the second subscriber information to the control device;
The controller is
Receiving the connection request and the second subscriber information from the communication terminal;
If the re-authentication flag is included in the connection request, authenticate the second subscriber information;
Using the second subscriber information to establish a communication path between the communication terminal and a packet communication network corresponding to a second communication path;
Communication control method. When establishing a first communication path with any one of the one or more packet communication networks using the first subscriber information for connecting to the mobile communication network,
Obtaining second subscriber information;
When requesting establishment of a second communication path with a packet communication network using the second subscriber information, a communication path including a re-authentication flag for requesting authentication of the second subscriber information is set. Transmitting a connection request for the second subscriber information to the control device;
Establishing the second communication path using the second subscriber information by receiving a connection completion from the control device;
Is a communication program that causes a communication terminal to execute.

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