JP2012063816A - Communication method, private xmpp server, xmpp client device, and communication system having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open a direct communication path directly transferring data between a client device connected to a public server and a private server without being visible from a network of the public server.SOLUTION: A private XMPP server includes: a public internal client function section to which an XMPP communication function conformed to the XMPP protocol is provided from a public XMPP server; and a private server function section opening, between itself and an XMPP client device, a private communication route through which data is directly transferred by the XMPP communication function. The XMPP client device includes: a public external client function section to which XMPP communication function is provided from the public XMPP server; and a private client function section opening a private communication path between itself and the private XMPP server by the XMPP communication function.

Description

  The present invention relates to a communication method, a private XMPP server, an XMPP client device, and a communication system including them.

  In recent years, client devices such as mobile terminals and personal computers that users always possess have become increasingly multifunctional. A user who uses a client device can collect a wide variety of information from various functions of the client device and various information services available through the client device. Then, the user can transfer and collect the collected information to a public server on a public network such as the Internet.

  Here, the data transferred by the user from the client device to the public server includes personal information of the user such as life log information in which data on the daily behavior of the user, for example, health status and meal history is accumulated. May be. When such personal information is transferred to a public server that can be used by an unspecified number of users, the personal information is stored in a shared storage provided to a general user in the public server. It will be. Therefore, in terms of security, the user has a psychological resistance to transferring information to the public server. For this reason, it is preferable to store information such as personal information that requires security on a private server such as a home server installed in the user's home.

  Here, it is not easy for a client device such as a portable terminal or a personal computer connected to a public server on a public network to directly and safely transfer data to a private server such as a home server. . For example, if a network address transfer (NAT) or a firewall is installed in a network connected to the home server, the home server is invisible to client devices outside the NAT on the network. Therefore, it is not easy for a client device outside the NAT or firewall to detect a home server on the network. Further, it has not been easy to directly connect an external client device and a home server.

  On the other hand, in Patent Document 1, designation information of a control device such as a mobile phone or a PC is transmitted to a controlled device through an XMPP server that is always connected to a controlled device that is a network home appliance, and the designation information A network system that establishes a direct access session between a control device and a controlled device is disclosed. In this network system, a direct access session is established regardless of whether or not the control device has a global address.

JP 2009-151479 A

  However, in Patent Document 1, the controlled device is handled only as a client device, and the control device and the controlled device are controlled by a service server different from the XMPP server using information transmitted to the controlled device. Has been. That is, Patent Document 1 discloses only a method for establishing a direct access session between a client and a client (between a control device and a controlled device).

  Normally, when a public server and a private server are connected (federated) between servers, the client device that directly accesses the private server becomes visible from the public network to which the public server is connected. This was not preferable.

  The present invention has been made in view of the above-described problems. Data is directly transmitted between a private server and a client device connected to the public server without being visible on the network of the public server. It is an object of the present invention to provide a communication method for simply opening a direct private data line to be transferred, a private XMPP server, an XMPP client device, and a communication system including them.

  In order to achieve the above goal, the communication method of the present invention provides a public XMPP that provides a public XMPP server with a communication function that conforms to a communication protocol defined in XMPP via a first communication path. Connecting to a server, connecting a public external client function unit of an XMPP client device to the public XMPP server providing the communication function via a second communication path, and the public internal client function unit; By the communication function provided from the public XMPP server, the public external client function unit directly transfers data between the private server function unit of the private XMPP server and the private client function unit of the XMPP client device. The private communication path to be transferred Comprising the steps of setting, the.

  According to the communication method having the above configuration, the public internal client function unit of the private XMPP server and the public external client function unit of the XMPP client device comply with the communication protocol defined in XMPP provided from the public XMPP server. Accordingly, a direct private communication path through which data is directly transferred is established between the private server function unit of the private XMPP server and the private client function unit of the XMPP client apparatus. As described above, the public internal client function unit of the private XMPP server and the public external client function unit of the XMPP client device use various application protocols (communication rules) defined in XMPP by the communication function provided from the public XMPP server. Can be used. Therefore, even if the private XMPP server is installed in a NAT (Network Address Transfer) or a firewall, the private XMPP server is directly connected to an external XMPP client device connected to the public XMPP server. A communication path can be easily established. In addition, since data is directly transferred between the private XMPP server and the XMPP client device via the private communication path, the data transfer is not affected by NAT, firewall, or the like. . Further, the public internal client function unit and the private server function unit of the private XMPP server are independent of each other. Further, the public external client function unit and the private client function unit of the XMPP client device are independent of each other. Therefore, the private server function unit of the private XMPP server and the private client function unit of the XMPP client device connected to the private XMPP server via the private communication path become invisible from the public network where the public XMPP server is installed. be able to. Therefore, the security of the private server function unit of the private XMPP server, the private client function unit of the XMPP client device, and the private communication path is improved.

  XMPP is an XML (eXtensible Markup Language) -based protocol (communication protocol) that is being standardized and standardized by the XMP (XMPP Standards Foundation) independent of the XMPP working group of the Internet Engineering Task Force (IETF). . XMPP runs a wide range of applications including instant messaging, presence ("what the person is now"), multi-person chat, voice or videophone, collaborative work, content syndication, generalized routing of XML data, etc. In order to perform control in real time and perform real-time communication in a communication system such as the Internet, it consists of a plurality of extension protocols (XEP: XMPP Extension Protocol) standardized for each purpose.

  In the communication method configured as described above, in the step of opening the private communication path, the public internal client function unit and the public external client function unit are XMPP XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions). , XEP-0177 (Jingle Raw UDP Transport), in accordance with at least one communication protocol, between the private server function unit of the private XMPP server and the private client function unit of the XMPP client device. The private communication path may be opened.

  By doing so, the public internal client function unit and the public external client function unit are provided with XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw) provided from the public XMPP server. Data is directly transferred between the private server function unit of the private XMPP server and the private client function unit of the XMPP client device by using a communication function that complies with at least one of the communication rules of UDP Transport). You can easily establish a direct private communication path. Therefore, even if a private XMPP server is installed in a NAT or firewall, a direct private communication path through which data is directly transferred to and from an external XMPP client device connected to the public XMPP server can be simplified. Can be opened. In addition, since data is directly transferred between the private XMPP server and the XMPP client device via the private communication path, the data transfer is not affected by NAT, firewall, or the like. .

  XEP-0166 (Jingle) is an XMPP protocol (communication protocol) that defines a function for establishing a communication path for transmitting and receiving data between two terminal devices capable of communication. XEP-0167 (Jingle RTP Sessions) is an XMPP protocol (communication protocol) that defines a function for establishing a communication path for transmitting and receiving audio data, video data, and the like in a streaming format using RTP (Real-time Transport Protocol). ). XEP-0177 (Jingle Raw UDP Transport Method) is an XMPP protocol (communication protocol) that defines data transmission / reception using UDP (User Datagram Protocol).

  In the communication method configured as described above, the private communication path is a logical communication path established between the private server function unit of the private XMPP server and the private client function unit of the XMPP client apparatus. In addition, the first communication path and the second communication path may be logically different communication paths. The logical communication path is a logically viewed virtual communication line (logical line) of a physically viewed communication line. For example, even if there is physically one communication line, a plurality of logical lines (logical communication paths) can be set. Also, different data communication can be performed on each logical line.

  With this configuration, when a direct private communication path through which data is directly transferred is established between the private XMPP server and the XMPP client apparatus, there is no need to newly provide a physical communication line. That is, a private communication path can be established using an existing physical communication line. Even when the first communication path, the second communication path, and the private communication path use the same physical communication line, they are different logical lines and thus do not interfere with each other. There is no possibility of occurrence of fluctuations in data transfer speed and fluctuations in data reception intervals.

  In the communication method configured as described above, the private communication path may be an encrypted line. By doing so, the data transferred through the private communication path can be protected and managed strictly by encryption, so that the data can be transferred safely and securely, and the security of the data Can be further improved. Note that the data transferred via the private communication path may be encrypted. For example, SSL (Secure Socket Layer) can be used for data encryption.

  In order to achieve the above-mentioned goal, the private XMPP server of the present invention is connected to the public XMPP server via the first communication path, and provides a communication function that conforms to the communication protocol defined by the XMPP from the public XMPP server. Private server function unit in which a private communication path for directly transferring data is established between the public internal client function unit to be connected and the XMPP client device connected to the public XMPP server via the second communication path The public internal client function unit is provided between the private server function unit and the XMPP client device by the communication function conforming to a communication protocol defined in XMPP provided from the public XMPP server. The private communication path is established.

  According to the private XMPP server having the above configuration, the public internal client function unit is connected between the private server function unit and the XMPP client device by a communication function that conforms to the communication protocol defined in the XMPP provided from the public XMPP server. Open a direct private communication path through which data is transferred directly. As described above, the private XMPP server can use various application protocols (communication rules) defined in XMPP. Therefore, even if the private XMPP server is installed in a NAT or firewall, a direct private communication path through which data is directly transferred to an external XMPP client device connected to the public XMPP server can be easily established. Can be established. In addition, since data is directly transferred between the private XMPP server and the XMPP client device via the private communication path, the data transfer is not affected by NAT, firewall, or the like. . Further, the public internal client function unit and the private server function unit of the private XMPP server are independent of each other. Therefore, the client device connected to the private server function unit or the private communication path via the private communication path can be invisible from the public network where the public XMPP server is installed. Therefore, the security of the private server function unit and the private communication path is improved.

  In the private XMPP server configured as described above, the public internal client function unit may include at least one of XMPP's XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). The private communication path may be opened between the private server function unit and the XMPP client device in conformity with a communication protocol.

  In this way, the public internal client function unit can perform at least one of XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport) provided from the public XMPP server. A direct private communication path through which data is directly transferred can be easily established between the private server function unit and the XMPP client device by using a communication function that complies with one of the communication rules. Therefore, even if a private XMPP server is installed in a NAT or firewall, a direct private communication path through which data is directly transferred to and from an external XMPP client device connected to the public XMPP server can be simplified. Can be opened. In addition, since data is directly transferred between the private XMPP server and the XMPP client device via the private communication path, the data transfer is not affected by NAT, firewall, or the like. .

  In the private XMPP server configured as described above, the private communication path is a logical communication path established between the private server function unit and the XMPP client device, and includes the first communication path and the first communication path. The communication path may be logically different from the two communication paths. With this configuration, when a direct private communication path through which data is directly transferred is established between the private XMPP server and the XMPP client apparatus, there is no need to newly provide a physical communication line. That is, a private communication path can be established using an existing physical communication line. Even when the first communication path, the second communication path, and the private communication path use the same physical communication line, they are different logical lines and thus do not interfere with each other. There is no possibility of occurrence of fluctuations in data transfer speed and fluctuations in data reception intervals.

  In the private XMPP server configured as described above, the private communication path may be an encrypted line. By doing so, the data transferred through the private communication path can be protected and managed strictly by encryption, so that the data can be transferred safely and securely, and the security of the data Can be further improved. Note that the data transferred via the private communication path may be encrypted. For data encryption, for example, SSL can be used.

  In order to achieve the above goal, the XMPP client apparatus of the present invention has a private communication path through which data is directly transferred to and from the private XMPP server connected to the public XMPP server via the first communication path. A private client function unit to be established and a public external client function unit that is connected to the public XMPP server via a second communication path and is provided with a communication function that conforms to a communication protocol defined in XMPP from the public XMPP server The public external client function unit is provided between the private client function unit and the private XMPP server by the communication function conforming to a communication protocol defined in XMPP provided from the public XMPP server. The private communication path is established.

  According to the XMPP client device having the above configuration, the public client function unit and the private XMPP server of the XMPP client device can communicate with the public client function unit and the private XMPP server according to the communication protocol compliant with the XMPP provided by the public XMPP server. In the meantime, a direct private communication path through which data is directly transferred is established. As described above, the XMPP client apparatus can use various application protocols (communication rules) defined in XMPP. Therefore, the XMPP client apparatus can easily establish a direct private communication path through which data is directly transferred with a private XMPP server installed in the NAT or firewall. In addition, since data is directly transferred between the private client function unit of the XMPP client device and the private XMPP server via a private communication path, the data transfer is blocked by NAT or firewall. You will not receive. Furthermore, the public external client function unit and the private client function unit of the XMPP client device are independent of each other. Therefore, the private client function unit of the XMPP client device can be invisible from the public network where the public XMPP server is installed. Therefore, the security of the private client function unit of the XMPP client device and the private communication path is improved.

  In the XMPP client device configured as described above, the public external client function unit may include at least one of XMPP's XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). The private communication path may be opened between the private client function unit and the private XMPP server in accordance with a communication protocol.

  In this way, the public external client function unit can include at least one of XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport) provided from the public XMPP server. Using a communication function that complies with one of the communication rules, a simple private communication path for transferring data directly between the private client function unit of the XMPP client device and the private XMPP server is simply established. Can do. Therefore, the XMPP client apparatus can more easily establish a direct private communication path through which data is directly transferred with a private XMPP server installed in the NAT or firewall. In addition, since data is directly transferred between the private client function unit of the XMPP client device and the private XMPP server via a private communication path, the data transfer is blocked by NAT or firewall. You will not receive.

  In the XMPP client device having the above-described configuration, the private communication path is a logical communication path established between the private client function unit and the private XMPP server, and includes the first communication path and the first communication path. The communication path may be logically different from the two communication paths. With such a configuration, when a direct private communication path for transferring data directly between the private client function unit of the XMPP client apparatus and the private XMPP server is established, a new physical communication line is established. There is no need to provide it. That is, a private communication path can be established using an existing physical communication line. Even when the first communication path, the second communication path, and the private communication path use the same physical communication line, they are different logical lines and thus do not interfere with each other. There is no possibility of occurrence of fluctuations in data transfer speed and fluctuations in data reception intervals.

  In the XMPP client device having the above configuration, the private communication path may be an encrypted line. By doing so, the data transferred through the private communication path can be protected and managed strictly by encryption, so that the data can be transferred safely and securely, and the security of the data Can be further improved. Note that the data transferred via the private communication path may be encrypted. For data encryption, for example, SSL can be used.

  In order to achieve the above goal, the communication system of the present invention includes a public XMPP server, the above private XMPP server, and the above XMPP client device.

  According to the communication system having the above-described configuration, the public internal client function unit of the private XMPP server and the public external client function unit of the XMPP client device are communication functions that comply with the communication protocol defined in XMPP provided from the public XMPP server. Accordingly, a direct private communication path through which data is directly transferred is established between the private server function unit of the private XMPP server and the private client function unit of the XMPP client apparatus. As described above, the public internal client function unit of the private XMPP server and the public external client function unit of the XMPP client device use various application protocols (communication rules) defined in XMPP by the communication function provided from the public XMPP server. Can be used. Therefore, even if the private XMPP server is installed in a NAT or firewall, a direct private communication path through which data is directly transferred to an external XMPP client device connected to the public XMPP server can be easily established. Can be established. In addition, since data is directly transferred between the private XMPP server and the XMPP client device via the private communication path, the data transfer is not affected by NAT, firewall, or the like. . Further, the public internal client function unit and the private server function unit of the private XMPP server are independent of each other. Further, the public external client function unit and the private client function unit of the XMPP client device are independent of each other. Therefore, the private server function unit of the private XMPP server and the private client function unit of the XMPP client device connected to the private XMPP server via the private communication path become invisible from the public network where the public XMPP server is installed. be able to. Therefore, the security of the private server function unit of the private XMPP server, the private client function unit of the XMPP client device, and the private communication path is improved.

  According to the present invention, even if the private XMPP server is installed in a NAT or firewall, a direct private communication path through which data is directly transferred to an external XMPP client device connected to the public XMPP server Can be easily established. In addition, since data is directly transferred between the private XMPP server and the XMPP client device via the private communication path, the data transfer is not affected by NAT, firewall, or the like. . Further, the public internal client function unit and the private server function unit of the private XMPP server are independent of each other. Further, the public external client function unit and the private client function unit of the XMPP client device are independent of each other. Therefore, the private server function unit of the private XMPP server and the private client function unit of the XMPP client device connected to the private XMPP server via the private communication path become invisible from the public network where the public XMPP server is installed. be able to. Therefore, the security of the private server function unit of the private XMPP server, the private client function unit of the XMPP client apparatus, and the private communication path is improved.

1 is a diagram illustrating an overall configuration of a data transfer system according to an embodiment of the present invention. It is a block diagram which shows the structure of the in-home XMPP server in embodiment of this invention. It is a block diagram which shows the structure of the portable terminal in embodiment of this invention. It is an operation | movement diagram for demonstrating the procedure which performs the setting for opening a direct private data line between a house XMPP server and a portable terminal in embodiment of this invention. It is an operation | movement diagram for demonstrating the procedure in which data are transmitted via the private data line | wire opened between the house XMPP server and the portable terminal in embodiment of this invention.

  An embodiment of the present invention will be described with reference to the drawings. In this embodiment, the communication system of the present invention directly transfers data from an XMPP client (XMPP client device) outside the mobile terminal 3 or the like to a home XMPP server 2 (private XMPP server) installed in the home. This is applied to the data transfer system 1. FIG. 1 is a diagram showing an overall configuration of a data transfer system according to an embodiment of the present invention. FIG. 1A is a conceptual diagram for explaining an outline of a communication method of the data transfer system according to the present embodiment. FIG. 1B is a conceptual diagram showing the relationship between the components of the data transfer system according to this embodiment.

  The data transfer system 1 (communication system) is constructed using XMPP (eXtensible Messaging and Presence Protocol) described later, and includes a mobile terminal 3 (XMPP client device), a home XMPP server 2 (private XMPP server), A public XMPP server 4. The in-home XMPP server 2 is connected to the public XMPP server 4 via the first network 61 (first communication path) at an arbitrary timing. The mobile terminal 3 is connected to the public XMPP server 4 via the second network 62 (second communication path) at an arbitrary timing.

  The public XMPP server 4 is a server that is used by an unspecified number of users, and is a public XMPP that communicates with the mobile terminal 3 or the in-home XMPP server 2 in accordance with an application protocol (communication protocol) defined in XMPP. It is a server. Examples of the public XMPP server 4 include a server group such as the cloud 41 and a server that provides various information services (for example, a chat room) to a virtual community in which a plurality of users participate. However, the present invention is not limited to these, and any XMPP server that can perform XMPP-compliant communication with the mobile terminal 3 or the home XMPP server 2 may be used.

  The in-home XMPP server 2 is connected to the public XMPP server 4 via the first network 61 at an arbitrary timing, thereby providing a communication function compliant with an application protocol (communication protocol) defined in XMPP. That is, the in-home XMPP server 2 functions as a client with respect to the public XMPP server 4. Further, the in-home XMPP server 2 can communicate with other XMPP client devices (for example, the mobile terminal 3) and other servers connected to the public XMPP server 4 via the public XMPP server 4. .

  The mobile terminal 3 is connected to the public XMPP server 4 via the second network 62 at an arbitrary timing, thereby providing a communication function compliant with an application protocol (communication protocol) defined in XMPP. That is, the mobile terminal 3 functions as a client for the public XMPP server 4. In addition, the mobile terminal 3 can communicate with other XMPP client devices and other servers (for example, the home XMPP server 2) connected to the public XMPP server 4 via the public XMPP server 4. .

  Further, as will be described later, data is directly transferred between the in-home XMPP server 2 and the mobile terminal 3 by a communication function compliant with the application protocol (communication protocol) defined in the XMPP provided by the public XMPP server 4. A private data line 7 (private communication path) which is a direct communication path to be transferred can be opened. Therefore, the user who uses the portable terminal 3 can transfer data directly to the in-home XMPP server 2 via the private data line 7 safely and reliably without going through the public XMPP server 4.

  The in-home XMPP server 2 accumulates data received from the portable terminal 3 via the private data line 7. The in-home XMPP server 2 can also integrate the received data with an archive, that is, other data, and accumulate it as data log information. The home XMPP server 2 can also provide the mobile terminal 3 with various data and information services that the home XMPP server 2 has via the private data line 7. As described above, in communication via the private data line 7, the in-home XMPP server 2 functions as a server, and the portable terminal 3 functions as a client.

  Here, XMPP used in the data transfer system 1 will be described. XMPP is an XML (eXtensible Markup Language) -based protocol (communication protocol) that is being standardized and standardized by XSF (XMPP Standards Foundation) independent of the XMPP working group of the Internet Engineering Task Force (IETF). XMPP runs a wide range of applications including instant messaging, presence ("what the person is now"), multi-person chat, voice or videophone, collaborative work, content syndication, generalized routing of XML data, etc. In order to perform control in real time and perform real-time communication in a communication system such as the Internet, it consists of a plurality of extension protocols (XEP: XMPP Extension Protocol) standardized for each purpose.

  The data transfer system 1 uses various protocols (communication rules) defined in the XMPP. Here, XEP-0030 (Service Discovery), XEP-0060 (Public-Subscribe), XEP-0163 (Personal Event Protocol), and XEP-0166 (Jingle) are important protocols for understanding the data transfer system 1. Explain etc.

  XEP-0030 (Service Discovery) is a protocol (communication protocol) that defines a function for detecting information. Hereinafter, it will be referred to as DISCO. In the data transfer system 1, as will be described later, the home XMPP server 2 and the portable terminal 3 use the DISCO to search for public XMPP.

  In addition, XEP-0060 (Publish-Subscribe) indicates that when information is changed in a terminal device on the information transmission side, the terminal device on the reception side sends the information to the terminal device on the information transmission side. A function for preliminarily signing (ie, subscribing to) a notification that a change has been made from the calling terminal device to the receiving terminal device, and the receiving terminal device at the receiving terminal device When a change is made to subscribed information from a terminal device, the originating terminal device changes the information to all receiving terminal devices that subscribe to the changed information. Is a protocol (communication protocol) that defines a function of transmitting a notification that a message has been added (that is, publishing). Hereinafter, it is referred to as pubsub.

  In addition, XEP-0163 (Personal Event Protocol) is a function that broadcasts information related to a user's presence (a user's current state) to subscribing XMPP client devices using a public function. Is a protocol (communication protocol). In the following, it is called pep.

  XEP-0166 (Jingle) is a protocol (communication protocol) that defines a function of establishing a communication path for transmitting and receiving data between two communicable terminal devices. Protocols related to this Jingle include XEP-0167 (Jingle RTP Sessions) and XEP-0177 (Jingle Raw UDP Transport Method). XEP-0167 (Jingle Raw UDP Transport) is a protocol (communication protocol) that defines a function for establishing a communication path for transmitting and receiving audio data, video data, and the like in a streaming format using RTP (Real-time Transport Protocol). . XEP-0177 (Jingle Raw UDP Transport Method) is a protocol (communication protocol) that defines transmission and reception of data using UDP (User Datagram Protocol). Hereinafter, XEP-0166 (Jingle) is referred to as Jingle. XEP-0167 (Jingle RTP Sessions) is called Jingle-RTP, and XEP-0177 (Jingle Raw UDP Transport Method) is called Jingle-UDP.

  In the data transfer system 1, as will be described later, Jingle (XEP-0166) and related protocols (communication protocol) such as Jingle-RTP (XEP-0167) and Jingle-UDP (XEP-0177) are used. In compliance, a direct private data line 7 for directly transferring data is opened between the portable terminal 3 and the home XMPP server 2. The portable terminal 3 can directly transfer the data to the home XMPP server 2 via the private data line 7.

  Next, a specific configuration of the home XMPP server 2 included in the data transfer system 1 in the present embodiment will be described in detail with reference to the drawings. FIG. 2 is a configuration diagram showing the configuration of the home XMPP server in this embodiment. As shown in FIG. 2, the in-home XMPP server 2 includes a communication unit 21, a storage unit 22, and a control unit 23. The in-home XMPP server 2 also includes an input unit 24 for giving various instructions to the in-home XMPP server 2 by an instruction operation by the user. The input unit 24 receives an instruction given to the home XMPP server 2 input by the user.

  The communication unit 21 is connected to the public XMPP server 4 via the first network 61 at an arbitrary timing, and communicates with the public XMPP server 4. Further, the communication unit 21 can communicate with the mobile terminal 3 through the private data line 7 when a direct private data line 7 through which data is directly transferred to the mobile terminal 3 is established. it can. Furthermore, the communication unit 21 can communicate with the public XMPP server 4 and the mobile terminal 3 in accordance with an application protocol (communication protocol) defined in XMPP.

  The storage unit 22 includes data transmitted / received by the communication unit 21, data input to the input unit 24 by a user input operation, data received from the mobile terminal 3 via the private data line 7, and a data log in which the data is archived Store information.

  The control unit 23 controls the communication unit 21, the storage unit 22, and the input unit 24. In addition, the control unit 23 is connected to the public XMPP server 4 via the first network 61, and the public XMPP server 4 is provided with a communication function conforming to an application protocol (communication protocol) defined in XMPP. Private in-house server function unit 232 (private server function unit) in which a private data line 7 (private communication path) through which data is directly transferred between the function unit 231 (public internal client function unit) and the portable terminal 3 is established And).

  The public premises client function unit 231 is connected to the public XMPP server 4 via the first network 61 and communicates with the public XMPP server 4 via the first network 61 at an arbitrary timing. This timing is not particularly limited. For example, when the input unit 24 receives an operation input for instructing a connection between the mobile terminal 3 and the public XMPP server 4 from the user, the public home client function unit 231 receives the public XMPP server 4 via the first network 61. May be connected.

  In addition, the public in-home client function unit 231 is provided with a communication function that conforms to the communication protocol defined in XMPP from the public XMPP server 4 via the first network 61. That is, the public home client function unit 231 causes the home XMPP server 2 to function as a client with respect to the public XMPP server 4. Further, the public premises client function unit 231 has a private data line between the private premises server function unit 232 and the portable terminal 3 by a communication function compliant with the communication protocol defined in the XMPP provided from the public XMPP server 4. 7 is established. As described above, the in-home XMPP server 2 can use various application protocols (communication rules) defined in XMPP.

  In this way, in the home XMPP server 2, the private home server function unit 232 and the portable terminal 3 are configured so that the public home client function unit 231 has a communication function that conforms to the communication protocol stipulated in XMPP provided from the public XMPP server 4. A direct private data line 7 through which data is directly transferred is opened. Therefore, the in-home XMPP server 2 can use various application protocols (communication rules) defined in XMPP. Therefore, even if the in-home XMPP server 2 is installed in the NAT or firewall, a direct private data line 7 through which data is directly transferred to the external portable terminal 3 connected to the public XMPP server 4 is provided. Can be easily established. In addition, since data is directly transferred between the in-home XMPP server 2 and the portable terminal 3 via the private data line 7, the data transfer is blocked by NAT or firewall. There is no.

  Further, the public in-house client function unit 231 and the private in-house server function unit 232 of the in-house XMPP server 2 are independent of each other. Therefore, the client device connected to the private in-house server function unit 232 or the private data line 7 may be invisible from the public network such as the cloud 41 in which the public XMPP server 4 is installed. it can. Therefore, the security of the private in-house server function unit 232 and the private data line 7 is improved. Therefore, the user using the mobile terminal 3 can safely and reliably use the private in-house server function via the private data line 7 without using the public XMPP server 4 for information such as personal information that is important for security. Can be transferred to the unit 232.

  The private data line 7 is a logical communication path. A logical communication path is a logically viewed virtual communication line (logical line) of a physically viewed communication line. For example, even if there is physically one communication line, a plurality of logical lines can be set. Each logical line can perform different data communications. Therefore, when establishing a direct private data line 7 for transferring data directly between the home XMPP server 2 and the portable terminal 3, a physical communication line different from the first network 61 and the second network 62 is provided. There is no need to provide. In other words, the private data line 7 can be established using a physical communication line through which the first network 61 and the second network 62 are communicated. Also, since the first network 61 and the second network 62 and the private data line 7 are separate logical lines, they do not interfere with each other and transfer fluctuations in which the data transfer speed and the data reception interval vary. There is no risk of occurrence.

  In addition, an encrypted line can be used as the private data line 7. By using an encrypted line, data transferred via the private data line 7 can be strictly protected and managed by encryption, so that data can be transferred safely and reliably. Data security can be further improved. The data transferred via the private data line 7 may be encrypted. For data encryption, for example, SSL can be used.

  As the private data line 7, a communication path (VPN line) using VPN (Virtual Private Network) may be used. By using a VPN line, it is possible to open a private data line 7 with high security by using a commonly used communication network.

  When a private private data line 7 capable of directly transferring data to the portable terminal 3 is established between the private premises server function unit 232 and the portable terminal 3, the private premises server function unit 232 communicates with the portable terminal 3 via the private data line 7. Data can be sent and received directly. Furthermore, the private in-house server function unit 232 can archive data received from the portable terminal 3 via the private data line 7 and store the data in the storage unit 22 as data log information. The private in-house server function unit 232 can also transfer data and provide information services to the portable terminal 3 via the private data line 7. As described above, the private in-house server function unit 232 causes the in-home XMPP server 2 to function as a server for the mobile terminal 3.

  The public premises client function unit 231 conforms to at least one of the communication rules of XMPP XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). The private data line 7 is opened between the private in-house server function unit 232 and the portable terminal 3.

  Therefore, even if the in-home XMPP server 2 is installed in the NAT or firewall, a direct private data line 7 through which data is directly transferred to the external portable terminal 3 connected to the public XMPP server 4 is provided. Can be easily established. In addition, since data is directly transferred between the in-home XMPP server 2 and the portable terminal 3 via the private data line 7, the data transfer is blocked by NAT or firewall. There is no.

  Next, a specific configuration of the mobile terminal 3 included in the data transfer system 1 will be described in detail with reference to the drawings. FIG. 3 is a configuration diagram showing the configuration of the mobile terminal in the present embodiment. As illustrated in FIG. 3, the mobile terminal 3 includes a terminal communication unit 31, a terminal storage unit 32, and a terminal control unit 33. The mobile terminal 3 includes a terminal input unit 34 for a user to give various instructions to the mobile terminal 3 through an instruction operation, and a terminal display unit 35 for displaying data. The user can input various instructions to the mobile terminal 3 by an instruction operation performed on the terminal input unit 34. For example, when the connection between the portable terminal 3 and the public XMPP server 4 is instructed, or when the private data line 7 is opened between the portable terminal 3 and the home XMPP server 2, the data is transferred via the private data line 7. Or select data.

  The terminal communication unit 31 is connected to the public XMPP server 4 via the second network 62 at an arbitrary timing, and communicates with the public XMPP server 4. The terminal communication unit 31 communicates with the in-home XMPP server 2 via the private data line 7 when a direct private data line 7 to which data is directly transferred is established with the in-home XMPP server 2. It can be carried out. Further, the terminal communication unit 31 can communicate with the public XMPP server 4 or the in-home XMPP server 2 in accordance with an application protocol (communication protocol) defined in XMPP.

  The terminal storage unit 32 stores data transmitted and received by the terminal communication unit 31, data input to the terminal input unit 34 by user input operations, data received from the home XMPP server 2 via the private data line 7, and the like. .

  The terminal control unit 33 controls the terminal communication unit 31, the terminal storage unit 32, the terminal input unit 34, and the terminal display unit 35. The terminal control unit 33 is connected to the public XMPP server 4 via the second network 62, and the public terminal client function unit 331 is provided with a communication function that conforms to the communication protocol defined by the XMPP from the public XMPP server 4. A private terminal in which a private data line 7 to which data is directly transferred is established between the (external external client function unit) and the home XMPP server 2 connected to the public XMPP server 4 via the first network 61 A client function unit 332 (private client function unit).

  When a direct private data line 7 capable of directly transferring data to / from the home XMPP server 2 is established, the private terminal client function unit 332 does not pass through the public XMPP server 4 but the private data Data can be directly transmitted to and received from the home XMPP server 2 via the line 7. The private terminal client function unit 332 can also receive an information service from the home XMPP server 2 via the private data line 7. As described above, the private terminal client function unit 332 causes the mobile terminal 3 to function as a client with respect to the in-home XMPP server 2.

  The public terminal client function unit 331 is connected to the public XMPP server 4 via the second network 62 and communicates with the public XMPP server 4 via the second network 62 at an arbitrary timing. This timing is not particularly limited. For example, when the terminal input unit 34 receives an operation input for instructing a connection between the portable terminal 3 and the public XMPP server 4 from the user, the public terminal client function unit 331 receives the public XMPP server via the second network 62. 4 may be connected.

  The public terminal client function unit 331 is provided with a communication function complying with the communication protocol defined by XMPP from the public XMPP server 4 via the second network 62. That is, the public terminal client function unit 331 causes the portable terminal 3 to function as a client with respect to the public XMPP server 4. Further, the public terminal client function unit 331 uses the communication function compliant with the communication protocol defined in XMPP provided from the public XMPP server 4 to transfer private data between the private terminal client function unit 332 and the home XMPP server 2. Line 7 is opened. As described above, the in-home XMPP server 2 can use various application protocols (communication rules) defined in XMPP.

  As described above, in the mobile terminal 3, the public terminal client function unit 331 is connected to the private terminal client function unit 332 of the mobile terminal 3 by a communication function compliant with the communication protocol defined in XMPP provided from the public XMPP server 4. A direct private data line 7 through which data is directly transferred is established with the home XMPP server 2. Therefore, the portable terminal 3 can use various application protocols (communication rules) defined in XMPP. Therefore, the portable terminal 3 can easily establish a direct private data line 7 to which data is directly transferred with the home XMPP server 2 installed in the NAT or firewall. In addition, since data is directly transferred between the private terminal client function unit 332 of the mobile terminal 3 and the in-home XMPP server 2 via the private data line 7, the data transfer is blocked by a NAT or a firewall. It is not affected by

  Further, the public terminal client function unit 331 and the private terminal client function unit 332 of the mobile terminal 3 are independent of each other. Therefore, the private terminal client function unit 332 of the mobile terminal 3 can be made invisible from the public network where the public XMPP server 4 is installed. Therefore, the security of the private terminal client function unit 332 of the mobile terminal 3 and the private data line 7 is improved. Therefore, the user who uses the portable terminal 3 can safely and surely transmit the important security information such as personal information via the private data line 7 without going through the public XMPP server 4. Can be transferred to.

  Further, the public terminal client function unit 331 conforms to at least one of the communication rules of XMPP XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). The private data line 7 is opened between the private terminal client function unit 332 and the home XMPP server 2.

  Accordingly, the mobile terminal 3 can easily establish direct private data to which data is directly transferred with the home XMPP server 2 installed in the NAT or firewall. In addition, since data is directly transferred between the private terminal client function unit 332 of the mobile terminal 3 and the in-home XMPP server 2 via the private data line 7, the data transfer is blocked by a NAT or a firewall. It is not affected by

  Next, a specific operation of the data transfer system 1 of the present embodiment will be described. FIG. 4 is an operation diagram for explaining a procedure for setting for establishing a direct private data line between the home XMPP server and the portable terminal in the embodiment of the present invention.

  In step S <b> 101, the public premises client function unit 231 of the premises XMPP server 2 is connected to the public XMPP server 4 such as the cloud 41 via the first network 61, and communicates with the public XMPP server 4 in conformity with XMPP. Establish a first public session capable of In the first public session, the public XMPP server 4 functions as a server, and the public in-home client function unit 231 of the in-home XMPP server 2 functions as a client.

  In step S102, the public terminal client function unit 331 of the mobile terminal 3 is connected via the public XMPP server 4 second network 62 at any timing, and communication with the public XMPP server 4 can be performed. A second public session is established. In the second public session, the public XMPP server 4 functions as a server, and the public terminal client function unit 331 of the mobile terminal 3 functions as a client.

  In step S103, the public XMPP server 4 transmits the presence list to the public in-home client function unit 231 of the in-home XMPP server 2 through the first public session, and to the public terminal client function unit 331 of the mobile terminal 3 through the second public session. Send presence list. The presence list transmitted to both parties indicates a list of client devices (including the home XMPP server 2 and the mobile terminal 3) connected to the public XMPP server 4, and indicates the current state for each client device. Have information. The presence information of each client device includes information such as the current communication state (for example, whether or not communication is possible) and an address of each client device.

  Further, the in-home XMPP server 2 and the portable terminal 3 receive this presence list, thereby recognizing that they can communicate with each other via the first public session, the public XMPP server 4, and the second public session. . In the following, the public in-home client function unit 231 of the home XMPP server 2 and the public terminal client function unit 331 of the mobile terminal 3 communicate via the first public session, the public XMPP server 4, and the second public session. The communication path to be used is called a public data line.

  Next, the public in-home client function unit 231 of the in-home XMPP server 2 receives data between the private in-house server function unit 232 of the in-home XMPP server 2 and the private terminal client function unit 332 of the mobile terminal 3 as necessary. Setting for opening a direct private data line 7 (private data communication path) that is directly transmitted and received is started.

  The setting and opening of the private data line 7 is performed in accordance with XMPP application protocols XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), XEP-0177 (Jingle Raw UDP Transport), and the like. Is called. At this time, the public in-home client function unit 231 of the in-home XMPP server 2 becomes a private data line 7 setting proposal side, that is, an initiator of Jingle, and the public terminal client function unit 331 of the portable terminal 3 It is the side that agrees or rejects the proposal of the setting, that is, the Jingle responder.

  In step S104, the public in-home client function unit 231 of the in-home XMPP server 2 directly communicates with the public terminal client function unit 331 of the mobile terminal 3 through the public data line. A message to propose opening the line 7 is transmitted.

  The timing at which the home XMPP server 2 sends a notification to the effect that the private data line 7 is proposed to the mobile terminal 3 is not particularly limited. For example, when the home XMPP server 2 receives a notification from the mobile terminal 3 to transmit data directly to the home XMPP server 2 via the public data line from the mobile terminal 3 via the public XMPP server 4, the home XMPP A notification that the server 2 proposes to open the private data line 7 may be transmitted to the portable terminal 3.

  In step 105, the public terminal client function unit 331 of the portable terminal 3 transmits a message indicating confirmation of the proposal to the public home client function unit 231 of the home XMPP server 2 via the public data line.

  In step 106, a setting for opening the private data line 7 between the public in-house client function unit 231 of the in-home XMPP server 2 and the public terminal client function unit 331 of the mobile terminal 3 through the public data line. Negotiation (negotiation) on the contents is performed in accordance with XMPP application protocols XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), XEP-0177 (Jingle Raw UDP Transport) and the like. By this negotiation, for example, a set of IP addresses capable of communication between the two is detected. Depending on the result of this negotiation, the public terminal client function unit 331 of the mobile terminal 3 which is a Jingle responder determines whether to accept or reject the proposal for opening the private data line 7. In the present embodiment, it is assumed that the public terminal client function unit 331 of the mobile terminal 3 has determined to agree as a result of the negotiation.

  In step S107, the public terminal client function unit 331 of the portable terminal 3 transmits an agreement to the proposal of setting of the private data line 7 to the public home client function unit 231 of the home XMPP server 2 via the public data line. .

  In step S108, the public in-home client function unit 231 of the in-home XMPP server 2 transmits to the public terminal client function unit 331 of the portable terminal 3 that the proposal consent has been confirmed via the public data line.

  Thus, the setting for opening a direct private data line 7 through which data is directly transmitted and received between the in-home XMPP server 2 and the portable terminal 3 is completed.

  Based on the settings made in the above procedure, a private data line 7 that directly connects the in-home XMPP server 2 and the portable terminal 3 is opened. The mobile terminal 3 can directly transmit data to the in-home XMPP server 2 without going through the public XMPP server 4 via the established private data line 7. FIG. 5 is an operation diagram for explaining a procedure for transmitting data via a private data line established between the home XMPP server and the portable terminal in the embodiment of the present invention.

  In step S201, in the in-home XMPP server 2, the public in-home client function unit 231 sends to the private in-house server function unit 232 parameters necessary for opening the private data line 7 set by negotiation (for example, the detected mobile terminal 3 Line setting information having an IP address or the like.

  In step S202, in the mobile terminal 3, the public terminal client function unit 331 causes the private terminal client function unit 332 to set parameters necessary for opening the private data line 7 set by negotiation (for example, the detected home XMPP server 2 Line setting information having an IP address or the like.

  In step S203, a direct private data line 7 through which data is directly transmitted and received is established between the private in-house server function unit 232 of the in-home XMPP server 2 and the private terminal client function unit 332 of the mobile terminal 3. The private data line 7 is established in accordance with XMPP application protocols XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), XEP-0177 (Jingle Raw UDP Transport), and the like. Here, the private data line 7 to be opened is a communication path that does not pass through the public XMPP server 4.

  The private data line 7 is a logical communication path established between the private in-house server function unit 232 of the in-home XMPP server 2 and the private terminal client function unit 332 of the mobile terminal 3, and the first network 61 The second network 62 is a logically different communication path. The logical communication path is a logically viewed virtual communication line (logical line) of a physically viewed communication line. For example, even if there is physically one communication line, a plurality of logical lines can be set. Also, different data communication can be performed on each logical line.

  Therefore, when establishing a direct private data line 7 through which data is directly transferred between the home XMPP server 2 and the portable terminal 3, it is not necessary to newly provide a physical communication line. That is, the private data line 7 can be opened using an existing physical communication line. Even if the first network 61 or the second network 62 and the private data line 7 use the same physical communication line, they are different logical lines and may interfere with each other. Therefore, there is no possibility of occurrence of fluctuations in transfer that vary the data transfer speed and the data reception interval.

  The private data line 7 is not particularly limited. The private data line 7 can be used as long as it is a line that can perform communication conforming to the XMPP application protocol. The private data line 7 can also use an encrypted line, a communication path (VPN line) using VPN, or the like, and can execute a private XMPP session. By using an encrypted line, data transferred via the private data line 7 can be strictly protected and managed by encryption, so that data can be transferred safely and reliably. Data security can be further improved. Further, by using a VPN line, it is possible to establish a private data line 7 with high security using a communication network that is generally shared. The data transferred via the private data line 7 may be encrypted. For example, SSL (Secure Socket Layer) can be used for data encryption.

  In step S <b> 204, the private terminal client function unit 332 of the mobile terminal 3 transmits the presence information of the mobile terminal 3 itself to the private home server function unit 232 of the home XMPP server 2 via the established private data line 7.

  In step S <b> 205, the mobile terminal 3 prepares data to be transferred from the private terminal client function unit 332 to the private in-house server function unit 232 of the in-home XMPP server 2 via the private data line 7. Here, for example, data such as personal information such as life log information is converted into data in XML (eXtensible Markup Language) format. At this time, data transferred via the private data line 7 may be encrypted using a protocol such as SSL (Secure Socket Layer).

  In step S206, the private terminal client function unit 332 of the portable terminal 3 sends the private home server function unit 232 of the home XMPP server 2 via the private data line 7 to pep (XEP-0163), which is an XMPP application protocol. In conformity with this, the data prepared in S205 is transferred. Note that, in addition to pep (XEP-0163), data transfer may be performed by a procedure based on pubsub (XEP-0060).

  In step S207, the private in-house server function unit 232 of the in-home XMPP server 2 receives the private terminal client function unit 332 of the mobile terminal 3 via the private data line 7, and archives and accumulates the data.

  In step S208, when the data transfer is completed, the private terminal client function unit 332 of the mobile terminal 3 sends the presence information including the notification that the data transfer is completed to the home XMPP server 2 via the private data line 7. Transmit to the private in-house server function unit 232.

  In step S209, in the portable terminal 3, the private terminal client function unit 332 notifies the public terminal client function unit 331 that the private data line 7 is to be disconnected.

  In step S210, in the home XMPP server 2, the private home server function unit 232 notifies the public home client function unit 231 that the private data line 7 is to be disconnected.

  In step S211, when the public terminal client function unit 331 of the portable terminal 3 is notified that the private data line 7 is disconnected from the private terminal client function unit 332, the public XMPP server 4 is notified via the second public session. A notification to disconnect the private data line 7 is transmitted. The public XMPP server 4 that has received the notification transmits a notification to the effect that the private data line 7 is disconnected to the public in-home client function unit 231 of the in-home XMPP server 2 via the first public session. The private data line 7 is disconnected in accordance with communication protocols such as XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport), which are XMPP application protocols. The

  In step S <b> 212, the public terminal client function unit 331 of the mobile terminal 3 disconnects the connection with the public XMPP server 4 via the second network 62 and ends the communication with the public XMPP server 4.

  In step S 213, the public premises client function unit 231 of the premises XMPP server 2 disconnects the connection with the public XMPP server 4 via the first network 61 and ends the communication with the public XMPP server 4.

  As described above, the public in-home client function unit 231 of the in-home XMPP server 2 and the public terminal client function unit 331 of the mobile terminal 3 have the communication functions compliant with the communication protocol defined in XMPP provided from the public XMPP server 4. Between the private in-house server function unit 232 of the in-home XMPP server 2 and the private terminal client function unit 332 of the mobile terminal 3, a direct private data line 7 through which data is directly transferred is established. As described above, the public in-home client function unit 231 of the in-home XMPP server 2 and the public terminal client function unit 331 of the mobile terminal 3 can use various application protocols defined in XMPP by communication functions provided from the public XMPP server 4. (Communication protocol) can be used. Therefore, even if the in-home XMPP server 2 is installed in the NAT or firewall, a direct private data line 7 through which data is directly transferred to the external portable terminal 3 connected to the public XMPP server 4 is provided. Can be easily established. In addition, since data is directly transferred between the in-home XMPP server 2 and the portable terminal 3 via the private data line 7, the data transfer is blocked by NAT or firewall. There is no.

  Further, the public in-house client function unit 231 and the private in-house server function unit 232 of the in-house XMPP server 2 are independent of each other. Furthermore, the public terminal client function unit 331 and the private terminal client function unit 332 of the mobile terminal 3 are independent of each other. Therefore, the private terminal server function unit 232 of the home XMPP server 2 and the private terminal client function unit 332 of the mobile terminal 3 connected thereto via the private data line 7 are disclosed in which the public XMPP server 4 is installed. It can be invisible from other networks. Therefore, the security of the private home server function unit 232 of the home XMPP server 2, the private terminal client function unit 332 of the mobile terminal 3, and the private data line 7 is improved. Therefore, the user who uses the portable terminal 3 can safely and surely transmit the important security information such as personal information via the private data line 7 without going through the public XMPP server 4. Can be transferred to the private in-house server function unit 232.

  The present invention has been described based on the embodiments. It is to be understood by those skilled in the art that this embodiment is an exemplification, and that various modifications can be made to each component and combination of processes within the scope of the present invention.

  For example, in the above-described embodiment, data requiring security, such as personal information such as life log information, is transferred from the mobile terminal 3 to the home XMPP server 2 installed in the home, and is sent to the home XMPP server 2. Although the stored data transfer system 1 has been described, the present invention is not limited to this. The present invention is applied to all information services using various application protocols (communication rules) defined in XMPP, which are used between a client device connected to the public XMPP server 4 and a private server. Is possible.

  Further, in the above-described embodiment, the data transfer system 1 is constructed using XMPP, and the public XMPP server 4, the in-home XMPP server 2, and the mobile terminal 3 are configured to perform communication conforming to XMPP. The invention is not limited to this. A protocol (communication protocol) similar to XMPP may be used.

  Further, in the above-described embodiment, setting / opening of the private data line 7 for performing data transfer, data transfer, and the like are performed by Jingle (XEP-0166), Jingle-RTP (XEP-0167), Jingle which are XMPP application protocols. -Although it shall be based on the rule of at least one of UDP (XEP-0177), it is not limited to this. Any protocol (communication protocol) for establishing a communication path for transmitting and receiving data between two communicable terminal devices can be used.

  In the above-described embodiment, the in-home XMPP server 2 and the mobile terminal 3 are connected to the public XMPP server 4 in S101 and S102 in FIG. 4 until the public session is disconnected in S212 and S213 in FIG. It was described as being always connected. Here, when the in-home XMPP server 2 is not always connected and does not have a temporary connection with the public XMPP server 4, the mobile terminal 3 temporarily holds communication with the public XMPP server 4 or the in-home XMPP server 2, Communication with the in-home XMPP server 2 may be retried via the public XMPP server 4 at an arbitrary timing.

  The present invention can be applied to all information services using various application protocols (communication rules) defined in XMPP, which are used between a client device connected to a public server and a private server. is there.

1 Data transfer system (communication system)
2 Home XMPP server (private XMPP server)
21 Communication Unit 22 Storage Unit 23 Control Unit 231 Public Home Client Function Unit (Public Internal Client Function Unit)
232 Private in-house server function section (private server function section)
24 Input unit 3 Mobile terminal (XMPP client device)
31 Terminal Communication Unit 32 Terminal Storage Unit 33 Terminal Control Unit 331 Public Terminal Client Function Unit (Public External Client Function Unit)
332 Private terminal client function part
(Private client function)
34 terminal input unit 35 terminal display unit 4 public XMPP server 41 cloud 61 first network (first communication path)
62 Second network (second communication path)
7 Private data line (private communication route)

Claims (13)

Connecting the public internal client function unit of the private XMPP server to a public XMPP server that provides a communication function compliant with the communication protocol defined in XMPP via the first communication path;
Connecting a public external client function unit of an XMPP client device to the public XMPP server providing the communication function via a second communication path;
The public internal client function unit and the public external client function unit are configured so that a private server function unit of the private XMPP server and a private client function unit of the XMPP client device are provided by the communication function provided from the public XMPP server. Between the steps of opening a private communication path through which data is transferred directly,
A communication method comprising: In the step of opening the private communication path,
The public internal client function unit and the public external client function unit are at least one of XMPP's XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). 2. The private communication path is established between the private server function unit of the private XMPP server and the private client function unit of the XMPP client device in conformity with a communication protocol. The communication method described.   The private communication path is a logical communication path established between the private server function unit of the private XMPP server and the private client function unit of the XMPP client apparatus, and the first communication path and The communication method according to claim 1 or 2, wherein the communication path is logically different from the second communication path.   The communication method according to claim 1, wherein the private communication path is an encrypted line. A public internal client function unit that is connected to a public XMPP server via a first communication path and is provided with a communication function that conforms to a communication protocol defined in XMPP from the public XMPP server;
A private server function unit that establishes a private communication path through which data is directly transferred to and from an XMPP client device connected to the public XMPP server via a second communication path;
With
The public internal client function unit is configured to cause the private communication path between the private server function unit and the XMPP client device by the communication function conforming to a communication protocol defined in XMPP provided from the public XMPP server. A private XMPP server characterized by the establishment of   The public internal client function unit conforms to at least one of the communication rules of XMPP XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). 6. The private XMPP server according to claim 5, wherein the private communication path is established between a private server function unit and the XMPP client device.   The private communication path is a logical communication path established between the private server function unit and the XMPP client device, and is logically different from the first communication path and the second communication path. The private XMPP server according to claim 5 or 6, wherein the private XMPP server is a route.   The private XMPP server according to claim 5, wherein the private communication path is an encrypted line. A private client function unit in which a private communication path through which data is directly transferred is established with a private XMPP server connected to the public XMPP server via the first communication path;
A public external client function unit connected to the public XMPP server via a second communication path and provided with a communication function that conforms to a communication protocol defined in XMPP from the public XMPP server;
With
The public external client function unit is configured so that the private communication path is connected between the private client function unit and the private XMPP server by the communication function conforming to a communication protocol defined in XMPP provided from the public XMPP server. XMPP client device, characterized in that   The public external client function unit conforms to at least one of the communication protocols of XMPP XEP-0166 (Jingle), XEP-0167 (Jingle RTP Sessions), and XEP-0177 (Jingle Raw UDP Transport). The XMPP client apparatus according to claim 9, wherein the private communication path is opened between a private client function unit and the private XMPP server.   The private communication path is a logical communication path established between the private client function unit and the private XMPP server, and is logically different from the first communication path and the second communication path. The XMPP client device according to claim 9 or 10, wherein the XMPP client device is a route.   The XMPP client device according to claim 9, wherein the private communication path is an encrypted line.   The communication system which has a public XMPP server, the private XMPP server in any one of Claims 5-8, and the XMPP client apparatus in any one of Claims 9-12.

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