JP2011130360A - Relay server, and client terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete module for storing data transferred from an own terminal therein in order to solve the problem that the storage capacity of the own terminal is small. <P>SOLUTION: A relay server is provided with a relay server information storage unit, a remote file control information storage unit, a data communication session establishment unit, and a remote file control session establishment unit. The remote file control information storage unit stores remote file control information shared among more than one relay servers and a plurality of client terminals based on relay server information, wherein the remote file control information includes information on a common storage region set in any of the plurality of client terminals and identification information of the client terminal in which the common storage region has been set. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to one or more relay servers and a plurality of client terminals used in a relay communication system.

Conventionally, a remote maintenance system for monitoring and maintaining an electronic device installed in a home or office from a remote location has been put into practical use. By using the remote maintenance system, a service person of a maintenance company can operate the electronic device remotely and perform maintenance work of the electronic device without going to the place where the electronic device is installed. As described above, when the remote maintenance system is used, the maintenance contractor can reduce the cost, and the user of the electronic device can obtain an advantage that the trouble can be solved at an early stage.

JP 2003-223521 A

  A maintenance worker's service person may perform maintenance work on the electronic device from the outside in order to quickly solve the trouble. Therefore, the service person carries a lightweight and small notebook personal computer to respond to the maintenance request. However, in general, a portable personal computer has a small storage capacity. Therefore, even if it is desired to save data transferred for maintenance work in a personal computer carried by itself, there may be a problem that the data cannot be saved due to a small storage capacity.

  An object of the present invention is to save data transferred from the own terminal even when the own terminal has a small storage capacity.

  A relay server according to an aspect of the present invention includes a relay server information storage unit, a remote file control information storage unit, a data communication session establishment unit, and a remote file control session establishment unit. The relay server information storage unit includes one or more relay server information including start information of one or more relay servers and start information and registration information of a plurality of client terminals connected to the one or more relay servers. Shared and stored between the server and a plurality of client terminals. In the remote file control information storage unit, remote file control information having information related to the common storage area set in any of the plurality of client terminals and identification information of the client terminal in which the common storage area is set is relayed. Based on the server information, it is shared and stored among one or more relay servers and a plurality of client terminals. The data communication session establishment unit establishes a data communication session for transferring communication data from a client terminal different from the client terminal in which the common storage area is set among the plurality of client terminals. The remote file control session establishing unit performs a remote file control session for storing communication data in the common storage area between the client terminal in which the common storage area is set and the client terminal that transfers the communication data through the data communication session. Establish.

  Here, one or more relay servers and a plurality of client terminals connected to the one or more relay servers share the relay server information and the remote file control information. Here, each of the plurality of client terminals is connected to any one of the one or more relay servers. The client terminal connected to the relay server may be a client terminal connected so as to be able to communicate with the relay server. Therefore, another relay server may be installed between the client terminal and the relay server, or another relay server may not be installed. On the other hand, the fact that the client terminal and the relay server are directly connected means that no other relay server is installed between the client terminal and the relay server.

  By referring to the shared relay server information and remote file control information, the relay server can confirm which client terminal can communicate and which client terminal has the common storage area set. Based on the confirmation, the relay server establishes a data communication session for transferring communication data from a client terminal different from the client terminal for which the common storage area is set, among the plurality of client terminals. Further, the relay server establishes a remote file control session for storing communication data in the common storage area between the client terminal in which the common storage area is set and the client terminal that transfers the communication data. In such a relay server, a storage area can be shared between one or more relay servers and a plurality of client terminals connected to the one or more relay servers. Accordingly, the communication data transferred from the client terminal can be stored in a common storage area set in a client terminal different from the client terminal that transfers the communication data.

  The client terminal in which the common storage area is set and the client terminal that transfers communication data may be directly connected to the same relay server.

  A relay server can communicate with one or more relay servers, and relay group information indicating that one or more relay servers communicable with itself forms a relay group is shared among the relay servers in the relay group. May further include a relay group information storage unit. Here, the relay server information and the remote file control information are shared and stored between the relay server and the client terminal in the relay group, and the client terminal that transfers communication data with the client terminal in which the common storage area is set, Each may be directly connected to a different relay server in the relay group.

  The relay server may further include a data operation notifying unit that instructs the client terminal that transfers the communication data to store the communication data in the common storage area based on the relay server information and the remote file control information.

  The data operation notifying unit may further notify an instruction to create a file in the common storage area to the client terminal that transfers the communication data based on the relay server information and the remote file control information.

  The data operation notifying unit may further notify an operation instruction of a file in the common storage area to the client terminal that transfers the communication data based on the relay server information and the remote file control information.

  A client terminal according to another aspect of the present invention is a client terminal that functions as one of a plurality of client terminals connected to one or more relay servers, and includes a relay server information storage unit and a remote file control information storage unit And a file creation instruction unit. In the relay server information storage unit, relay server information including start information of one or more relay servers and start information and registration information of a plurality of client terminals is transmitted between the one or more relay servers and the plurality of client terminals. Shared and stored. The remote file control information storage unit includes a remote storage having information on a common storage area set in a client terminal different from the own terminal among a plurality of client terminals, and identification information of the client terminal in which the common storage area is set File control information is shared and stored among one or more relay servers and a plurality of client terminals based on the relay server information. The file creation instruction unit saves communication data transferred from the own terminal by a data communication session in the common storage area between the own terminal and the client terminal in which the common storage area is set based on the remote file control information. Request creation of a file in the common storage area via a remote file control session established in

  The client terminal may be directly connected to the same relay server as the relay server to which the client terminal in which the common storage area is set is directly connected among the one or more relay servers.

  The client terminal is a plurality of client terminals in which relay group information indicating that a plurality of relay servers including one or more relay servers form a relay group is connected to the plurality of relay servers and the plurality of relay servers in the relay group. It may further include a relay group information storage unit that is shared and stored between them. Here, the client terminal shares the relay server information and the remote file control information with the client terminals connected to a plurality of relay servers in the relay group, and a common storage area is set among the plurality of relay servers. The client terminal may be directly connected to a relay server different from the relay server to which the client terminal is directly connected.

  The client terminal further includes a data operation instruction unit that instructs the client terminal having the common storage area to store the communication data in a file created by a request from the file creation instruction unit via a remote file control session. You may have.

  The data operation instruction unit may further instruct a file operation to a client terminal having a common storage area via a remote file control session.

  A client terminal according to another aspect of the present invention is a client terminal that functions as one of a plurality of client terminals connected to one or more relay servers, and includes a relay server information storage unit and a remote file control information storage unit And a file creation unit. In the relay server information storage unit, relay server information including start information of one or more relay servers and start information and registration information of a plurality of client terminals is transmitted between the one or more relay servers and the plurality of client terminals. Shared and stored. The remote file control information storage unit includes remote file control information having information related to the common storage area set in the terminal and identification information of the terminal based on the relay server information. Are shared and stored among client terminals. Based on the remote file control information, the file creation unit is established for storing communication data in a common storage area between the own terminal and a client terminal that transfers communication data through a data communication session among a plurality of client terminals. When a file creation request is received via a remote file control session, a file is created in the common storage area.

  The client terminal may be directly connected to the same relay server as the relay server to which the client terminal that transfers communication data is directly connected among the one or more relay servers.

  The client terminal is a plurality of client terminals in which relay group information indicating that a plurality of relay servers including one or more relay servers form a relay group is connected to the plurality of relay servers and the plurality of relay servers in the relay group. It may further include a relay group information storage unit that is shared and stored between them. Here, the client terminal shares the relay server information and the remote file control information with the client terminals connected to the plurality of relay servers in the relay group, and the client terminal transfers the communication data among the plurality of relay servers. The terminal may be directly connected to a relay server different from the relay server to which the terminal is directly connected.

  The client terminal further includes a data operation unit that stores the communication data in the created file when receiving an instruction to save the communication data from the client terminal that transfers the communication data via the remote file control session. Also good.

  When the data operation unit receives an instruction to operate the file in the common storage area via the remote file control session, the data operation unit may further perform the operation of the file in the common storage area.

  In the present invention as described above, a storage area can be shared between one or more relay servers and a plurality of client terminals connected to the one or more relay servers. Accordingly, the transfer data can be stored in the shared storage area.

It is a schematic diagram which shows the whole structure of the relay communication system in 1st Embodiment. It is a block diagram which shows the component of a 1st relay server. It is a block diagram which shows the component of a 1st client terminal. It is a figure which shows schematic structure of relay group information. It is a figure which shows the detailed structure of relay group information. It is a figure which shows schematic structure of relay server information. It is a figure which shows the detailed structure of relay server information. It is client terminal information stored in the first relay server. This is client terminal information stored in the second relay server. This is client terminal information stored in the third relay server. It is a figure which shows the detailed structure of remote file control information. It is a figure which shows the flow of the process in connection with construction of a relay group. It is a figure which shows the detailed structure of the relay server information before replacement | exchange. It is a figure which shows the detailed structure of the relay server information before replacement | exchange. It is a figure which shows the detailed structure of the relay server information before replacement | exchange. It is a figure which shows the flow of the process in connection with sharing of relay group information and relay server information. It is a figure which shows the share of the remote file control information in 1st Example, and the flow of a data preservation | save process. It is a figure which shows the flow of the sharing of the remote file control information in 2nd Example, and a data preservation | save process. It is a schematic diagram which shows the whole structure of the relay communication system in 2nd Embodiment. It is a figure which shows the flow of the sharing of remote file control information in 2nd Embodiment, and a data preservation | save process.

1. 1. First Embodiment 1.1 Overall Configuration of Relay Communication System Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the overall configuration of a relay communication system. The relay communication system includes a first LAN 1, a second LAN 2, a third LAN 3, and a WAN 4. The first LAN 1, the second LAN 2, and the third LAN 3 are small-scale networks that are constructed remotely. The WAN 4 is a large-scale network such as the Internet.

  In this embodiment, as will be described in detail later, the first relay server A of the first LAN1, the second relay server B of the second LAN2, and the third relay server C of the third LAN3 constitute a first relay group. ing.

  The first LAN 1 has a fourth LAN 6 and a fifth LAN 7, and both are connected by a first general-purpose router 8. In the fourth LAN 6, the first relay server A, the first client terminal A1, and the first communication device 9 are connected to each other. In the fifth LAN 7, the second client terminal A2, the second communication device 10, and the third communication device 11 are connected to each other.

  In the second LAN 2, the second relay server B, the third client terminal B1, and the fourth communication device 14 are connected to each other.

  The third LAN 3 includes a sixth LAN 16, a seventh LAN 17, and an eighth LAN 18. The sixth LAN 16 and the seventh LAN 17 are connected by a second general-purpose router 19, and the sixth LAN 16 and the eighth LAN 18 are connected by a third general-purpose router 21. It is connected. The third relay server C belongs to the sixth LAN 16. In the seventh LAN 17, the fourth client terminal C1 and the fifth communication device 22 are connected to each other. In the eighth LAN 18, the fifth client terminal C2 and the sixth communication device 23 are connected to each other.

  In the first client terminal A1, the second client terminal A2, the third client terminal B1, the fourth client terminal C1, and the fifth client terminal C2, for example, an OS (operation system), a browser, and the like are incorporated in a computer such as a personal computer. It is a thing. The first communication device 9, the second communication device 10, the third communication device 11, the fourth communication device 14, the fifth communication device 22, and the sixth communication device 23 are also personal computers, for example.

  The first relay server A, the second relay server B, and the third relay server C are connected to each other among the first client terminal A1, the second client terminal A2, the third client terminal B1, the fourth client terminal C1, and the fifth client terminal C2. Relay communication between them. The WAN 4 relays communication among the first relay server A, the second relay server B, and the third relay server C.

  Note that, for example, SIP is used as a communication protocol among the first relay server A, the second relay server B, and the third relay server C. However, the present invention is not limited to this, and other protocols may be used.

1.2 Components of the relay server The relay server is connected not only to the LAN but also to the WAN, can communicate with each client terminal connected to the same LAN, and is also arranged in another LAN. Communication with the server is possible. Therefore, each relay server is given a global IP address in addition to the private IP address.

  FIG. 2 shows components of the first relay server A. Note that the components of the second relay server B and the third relay server C are the same as those of the first relay server A, and thus description thereof is omitted.

  The first relay server A includes an interface 121, a control unit 122, and a database storage unit 127.

  The interface 121 performs communication with a terminal in the first LAN 1 using a private IP address. The interface 121 performs communication with the WAN 4 using the global IP address.

  The control unit 122 is, for example, a CPU having control and calculation functions, and can execute various processes using a loaded program. The control unit 122 controls various communications performed via the interface 121. In addition, the control unit 122 creates, updates, or stores information stored in the database storage unit 127.

  In the present embodiment, the control unit 122 includes a remote file control information control unit 123, a data communication session establishment unit 124, a remote file control session establishment unit 125, and a data operation notification unit 126.

The remote file control information control unit 123 updates or stores the remote file control information stored in the database storage unit 127. Further, the remote file control information control unit 123 refers to relay server information described later and notifies the remote file control information to other relay servers and / or client terminals.
The remote file control information is a virtual name of a common storage area where communication data transferred between client terminals is stored, and details of the client terminal in which the common storage area is set, that is, the common storage area can be operated. It is information which shows. Details of the remote file control information will be described later.

  The data communication session establishment unit 124 refers to the relay server information and establishes a communication session for transferring communication data between client terminals with other relay servers. The remote file control session establishment unit 125 refers to the relay server information, and performs a remote file control session for storing communication data transferred between client terminals in the common storage area, and a client terminal capable of operating the common storage area Established with a relay server connected to.

  The data operation notifying unit 126 refers to the relay server information and the remote file control information, and instructs the client terminal to save the communication data transferred from the client terminal in the common storage area indicated by the remote file control information I do. The data operation notifying unit 126 can instruct a client terminal connected in the same LAN to save data, or can instruct a client terminal connected to another LAN to save data. It can be carried out. Each function of the relay server centering on the control unit 122 will be described later.

  The database storage unit 127 is, for example, a hard disk or a nonvolatile RAM, and can store various data. The database storage unit 127 includes a relay group information storage unit 128, a relay server information storage unit 129, a client terminal information storage unit 130, and a remote file control information storage unit 131. Specific examples of such information will be described later.

1.3 Components of Client Terminal A client terminal is a terminal that can be directly operated by a user. The client terminal is, for example, a personal computer used for daily work by a user. The client terminal is given a private IP address that is uniquely managed within the same LAN.

  FIG. 3 shows the components of the first client terminal. Hereinafter, the first client terminal A1 will be described. The constituent elements of the second client terminal A2, the third client terminal B1, the fourth client terminal C1, and the fifth client terminal C2 are the same as those of the first client terminal A1, and thus the description thereof is omitted.

  The first client terminal A1 includes an interface 221, a control unit 222, a database storage unit 229, and a communication data storage unit 233.

  The interface 221 performs communication with the first relay server A connected to the first LAN 1 using the private IP address.

  The control unit 222 is, for example, a CPU having control and calculation functions, and can execute various processes using a loaded program. The control unit 222 controls various communications performed via the interface 221. The control unit 222 creates, updates, or stores information stored in the database storage unit 229 and the communication data storage unit 233.

  The control unit 222 of the present embodiment includes a remote file control information creation unit 223, a remote file control information control unit 224, a file creation instruction unit 225, a file creation unit 226, a data operation instruction unit 227, and a data operation unit. 228.

  The remote file control information creation unit 223 creates remote file control information based on the user operation of the client terminal. For example, when the remote file control information creation unit 223 of the first client terminal A1 creates the remote file control information, the identification information of the first client terminal A1 is the remote file control information as a client terminal capable of operating the common storage area. Set to That is, creating remote file control information declares that there is a common storage area that can be directly accessed by the own terminal, and that the own terminal is an owner client terminal that can operate the common storage area.

  The remote file control information control unit 224 updates or stores the remote file control information stored in the database storage unit 229.

  When the file creation instructing unit 225 receives an instruction from the data operation notifying unit 126 of the relay server to save the communication data transferred by the own terminal or an instruction to create a file in the common storage area, the remote file control With reference to the information, the client terminal capable of operating the common storage area is notified of a request to create a file in the common storage area.

  Upon receiving a file creation request from the file creation instruction unit 225, the file creation unit 226 creates a file in the common storage area using the OS (operation system) of the terminal itself. The file created here is an actual file in the common storage area represented by a virtual name in the remote file control information.

  The data operation instruction unit 227 issues an instruction to save communication data in the file created by the file creation unit 226. Specifically, the data operation instruction unit 227 notifies the client terminal that can operate the common storage area of the write file command together with the communication data. The data operation instruction unit 227 can also issue an operation instruction for a file in the common storage area. Specifically, the data operation instruction unit 227 can issue an instruction to open a file in the common storage area and / or an instruction to edit the file.

  The data operation unit 228 stores the received communication data in the file created by the file creation unit 226 based on an instruction from the data write instruction unit 227. Further, the data operation unit 228 can perform file operations such as opening and / or editing of the created file based on an instruction from the data operation instruction unit 227.

  Each function of the client terminal centering on the control unit 222 will be described later. Note that the remote file control information control unit 224, the file creation instruction unit 225, and the data operation instruction unit 227 function in the client terminal that receives the data storage instruction and transfers the communication data to another client terminal. On the other hand, in a client terminal in which a common storage area is set and the common storage area can be operated, the remote file control information control unit 224, the file creation unit 226, and the data operation unit 228 function.

  The database storage unit 229 is, for example, a hard disk or a nonvolatile RAM, and can store various data. The database storage unit 229 includes a relay group information storage unit 230, a relay server information storage unit 231, and a remote file control information storage unit 232. Specific examples of the above information will be described later.

  The communication data storage unit 233 is a common storage area for storing communication data transferred between clients. The communication data storage unit 233 is a hard disk and may be in the local disk of the client terminal or in an external drive. As described above, the file creation unit 226 creates a file in the common storage area in the communication data storage unit 233, and the data operation unit 228 writes the saved communication data in the file.

1.4 Specific Example of Relay Group Information FIG. 4 shows a schematic configuration of the relay group information 20. The relay group information is information indicating an outline of each relay group in the relay communication system. FIG. 4 shows that the first relay group includes a first relay server A, a second relay server B, and a third relay server C.

  FIG. 5 shows a detailed configuration of the relay group information 20. The relay group information 20 includes upper information 201 and lower information 202.

The upper information 201 is information about the first relay group itself. “Group id” indicates identification information of the relay group. “Lastmod” indicates the latest update time of the relay group information. “Name” indicates the name of the relay group.
The lower information 202 is information about the first relay server A, the second relay server B, and the third relay server C. “Site id” indicates identification information of the relay server.

  The relay group information 20 is stored in the relay group information storage unit 128 of the relay server in the same relay group. That is, the relay group information 20 is shared among the first relay server A, the second relay server B, and the third relay server C. Further, the relay group information 20 is stored in the relay group information storage unit 230 of the client terminal in the same relay group. As a result, the relay group information 20 is shared between the relay server and the client terminal in the same relay group.

1.5. Specific Example of Relay Server Information FIG. 6 shows a schematic configuration of the relay server information 30. The relay server information is information indicating an outline of the relay server and the client terminal that constitute the relay communication system.

  As shown in FIG. 6, a first client terminal A1 and a second client terminal A2 are connected to the first relay server A. A third client terminal B1 is connected to the second relay server B. A fourth client terminal C1 and a fifth client terminal C2 are connected to the third relay server C.

  FIG. 7 shows a detailed configuration of the relay server information 30. The relay server information 30 is composed of upper information 301-1, 301-2, 301-3 and lower information 302-1, 302-2, 302-3.

The upper information 301-1, 301-2, 301-3 is information about the relay server. “Site id” indicates identification information of the relay server. “Name” indicates the name of the relay server. “Stat” indicates information about whether or not the relay server is activated.
The lower information 302-1, 302-2, 302-3 is information about the client terminal. “Div” indicates a department name of the client terminal. “Group” indicates identification information of the relay group to which the client terminal belongs. “Id” indicates identification information of the client terminal. “Name” indicates the name of the client terminal. “Site” indicates identification information of a relay server that is a logon destination when the client terminal is logged on.

  The relay server information 30 is stored in the relay server information storage unit 129 of the relay server in the same relay group. That is, the relay server information 30 is shared among the first relay server A, the second relay server B, and the third relay server C. Further, the relay server information 30 is stored in the relay server information storage unit 231 of the client terminal in the same relay group. As a result, the relay server information 30 is shared between the relay server and the client terminal.

  When the relay server is activated, “stat” of the upper information 301-1, 301-2, 301-3 is “active”. When the relay server is not activated, “stat” is blank. Thereby, information about whether or not the relay server is activated is shared as the entire relay communication system.

  When the client terminal is logged on to the relay server, the identification information of the relay server to which the client terminal is logged on is described in “site” of the lower information 302-1, 302-2, 302-3. When the client terminal is not logged on to the relay server, “site” is blank. Thereby, information about whether or not the client terminal is logged on to the relay server is shared as the entire relay communication system.

1.6 Specific Examples of Client Terminal Information FIGS. 8, 9, and 10 show client terminal information 40, 50, and 60 as specific examples of client terminal information, respectively. The client terminal information is information indicating details of the client terminals that constitute the relay communication system.

  “Addr” is client terminal address information, and specifically indicates the IP address of the client terminal. “Div” indicates a department name of the client terminal. “Expr” is client terminal expiration date information, and specifically indicates the registration expiration date of the client terminal. “Group” indicates identification information of the relay group to which the client terminal belongs. “Id” indicates identification information of the client terminal. “Name” indicates the name of the client terminal. “Pass” indicates a password of the client terminal. “Port” is client terminal port information, and specifically indicates the port number of the client terminal.

  The client terminal information 40 is stored in the client terminal information storage unit 130 of the first relay server A. The client terminal information 50 is stored in the client terminal information storage unit 130 of the second relay server B. The client terminal information 60 is stored in the client terminal information storage unit 130 of the third relay server C.

1.7 Specific Example of Remote File Control Information The remote file control information 70 includes a virtual name of a common storage area where communication data transferred between client terminals is stored, and a client terminal capable of operating the common storage area. This is information indicating details.

  FIG. 11 is a diagram showing a detailed configuration of remote file control information. The remote file control information 70 includes “OWNER” information, “PATH” information, and “ID” information.

  The “OWNER” information indicates a client terminal that can directly operate a common storage area in which communication data is stored. Here, “OWNER” is the first client terminal A1.

“PATH” indicates a virtual name indicating the common storage area. Here, “PATH” is “folderA”. This “folderA” is a virtual folder name used when informing the common storage area to other relay servers and client terminals, and does not reflect the actual storage location. In this embodiment, the actual storage location is assumed to be a file in the communication data storage unit 233 provided in the client terminal. However, the actual storage location is not limited to the communication data storage unit provided in the own terminal as long as it is a storage area that can be directly accessed and operated by the client terminal.
“ID” indicates identification information for specifying the common storage area.

  The remote file control information 70 is stored in the remote file control information storage unit 131 of the relay server in the same relay group. That is, the remote file control information 70 is shared among the first relay server A, the second relay server B, and the third relay server C. Further, the remote file control information 70 is stored in the remote file control information storage unit 232 of the client terminal in the same relay group. As a result, the remote file control information 70 is shared between the relay server and the client terminal.

1.8 Initial Setting Initial setting of the first relay group will be described with reference to the sequence diagram of FIG. Specifically, FIG. 12 shows a flow of processing related to creation of relay group information, relay server information, and client terminal information. Hereinafter, the control unit of the first relay server A will be described as the control unit 122A, the control unit of the second relay server B will be described as the control unit 122B, and the control unit of the third relay server C will be described as the control unit 122C. In the following, the other parts in FIGS. 2 and 3 are also suffixed with A, B, C, A1, B1, C1, and C2, respectively, depending on the relay server or client terminal to which they belong. explain.

1.8-1 Creation of Account The administrator of the first relay server A creates an account for the users of the first client terminal A1 and the second client terminal A2 (Step S1, Step S2: Create_Account ()). . The administrator of the second relay server B creates an account for the user of the third client terminal B1 (step S3: Create_Account ()). The administrator of the third relay server C creates an account for the users of the fourth client terminal C1 and the fifth client terminal C2 (step S4, step S5: Create_Account ()).

  In the above processing, the control unit 122A of the first relay server A creates relay server information and stores it in the relay server information storage unit 129A. Similarly to the first relay server A, the control unit 122B of the second relay server B and the control unit 122C of the third relay server C respectively create relay server information and store them in the relay server information storage units 129B and 129C.

  The control unit 122A of the first relay server A creates client terminal information and stores it in the client terminal information storage unit 130A. Similarly to the first relay server A, the control unit 122B of the second relay server B and the control unit 122C of the third relay server C create client terminal information and store them in the client terminal information storage units 130B and 130C. .

  FIGS. 13, 14 and 15 show the relay server information 31-1, the relay server information 31-2, and the relay server information 31-3. The relay server information 31-1 is information that the control unit 122A of the first relay server A creates and stores. The relay server information 31-2 is information that the control unit 122B of the second relay server B creates and stores. The relay server information 31-3 is information created and stored by the control unit 122C of the third relay server C.

In FIG. 13, the upper information 311-1 is information about the first relay server A. As “site id”, “serverA@relay.net” is set. “ServerA” is set as “name”. “Active” is set as “stat”.
The lower information 312-1 is information about the first client terminal A1 and the second client terminal A2.

  Information about the first client terminal A1 is as follows. “Dev” is set as “div”. As “group”, “20070402133100@serverA.relay.net” is set. As “id”, “clientA1@ServerA.relay.net” is set. “ClientA1” is set as “name”. In FIG. 13, “serverA.relay.net” is set for “site”, and the user of the first client terminal A1 is logged on to the first relay server A. “Site” is blank in the 12 steps S1 to S6.

  Information about the second client terminal A2 is as follows. “Dev” is set as “div”. As “group”, “20070402133100@serverA.relay.net” is set. As “id”, “clientA2@serverA.relay.net” is set. “ClientA2” is set as “name”. Note that the notation of “site” is the same as that of the first client terminal A1.

  The contents of the relay server information 31-2 and the relay server information 31-3 are the same as the contents of the relay server information 311 and will not be described.

1.8-2 Creation of Relay Group Information In FIG. 12, the first relay server A requests the second relay server B to construct a group of the relay communication system (step S6: Set_Group ()). The control unit 122A of the first relay server A creates relay group information and stores it in the relay group information storage unit 128A. The control unit 122B of the second relay server B creates relay group information and stores it in the relay group information storage unit 128B. Next, the first relay server A requests the second relay server B to exchange relay server information (step S7: Exchange (db)). Thereby, the first relay server A transmits the relay server information to the second relay server B, and the second relay server B transmits the relay server information to the first relay server A. The control unit 122A of the first relay server A and the control unit 122B of the second relay server B combine the relay server information to create new relay server information, and store it in the relay server information storage units 129A and 129B, respectively. To do. Although not shown in the drawing, the same processing as in steps S6 and S7 is executed between the first relay server A and the third relay server C, and further, the second relay server B and the third relay server C. It is also executed between. As a result, common relay server information is held among the first relay server A, the second relay server B, and the third relay server C.

1.8-3 Updating Relay Server Information During Logon Operation The user of the second client terminal A2 inputs the identification information and password of the second client terminal A2 and logs on to the first relay server A (step S8: Register). The control unit 122A of the first relay server A refers to the client terminal information and performs user authentication of the second client terminal A2. The control unit 122A updates the client terminal information.

  Subsequently, the second client terminal A2 requests the first relay server A to provide relay group information and relay server information (step S9: Get ()). The first relay server A transmits relay group information and relay server information to the second client terminal A2. The control unit 222A2 of the second client terminal A2 stores relay group information and relay server information.

  If the control unit 122A of the first relay server A refers to the relay server information and confirms that the “stat” regarding the second relay server B is “active”, the relay server information is updated. It is determined that the second relay server B should be notified. Therefore, the first relay server A notifies the second relay server B that the relay server information has been updated (step S10: Notify ()). The control unit 122B of the second relay server B updates the relay server information and stores it in the relay server information storage unit 129B. The first relay server A also notifies the third relay server C that the relay server information has been updated (step S11: Notify ()).

  When the users of the first client terminal A1, the third client terminal B1, the fourth client terminal C1, and the fifth client terminal C2 log on to each relay server, the relay server information in the relay server is updated in the same manner. Similarly, the relay server information in the relay server is updated when the user of each client terminal logs off.

1.9 Sharing of Information 1.9-1 Sharing of Relay Group Information First, sharing processing when information of a relay group is changed will be described.

  FIG. 16 is a diagram showing a flow of processing relating to sharing of relay group information and relay server information. In FIG. 16, when a change occurs in the first relay group, for example, the first relay server A transmits the changed relay group information to the second relay server B (step S21: Set_Group (relay group information). )). Then, the second relay server B transmits the relay group information to the third client terminal B1 (step S21.1: Set_Group (relay group information)). When an OK response is returned from the third client terminal B1, the second relay server B returns an OK response to the first relay server A.

  Further, the first relay server A transmits the changed relay group information to the second client terminal A2 (step S22: Set_Group (relay group information)). The second client terminal A2 returns an OK response to the first relay server A. The first relay server A transmits the changed relay group information to the first client terminal A1 (step S23: Set_Group (relay group information)). The first client terminal A1 returns an OK response to the first relay server A.

  The first relay server A transmits the changed relay group information to the third relay server C (step S21.2: Set_Group (relay group information)). Then, the third relay server C transmits the relay group information to the fourth client terminal C1 and the fifth client terminal C2 (step S21.2.1, step S21.2.2: Set_Group (relay group information)). . When an OK response is returned from each of the fourth client terminal C1 and the fifth client terminal C2, the third relay server C returns an OK response to the first relay server A.

  Through the above processing, all relay servers and client terminals in the first relay group share the relay group information.

1.9-2 Sharing Relay Server Information Next, sharing of relay server information will be described. Here, the sharing process uses an event notification framework. In event notification, a subscriber is an agent that requests resource state notification, and a notifier is an agent that notifies a resource state. When there is a change in the status of the resource during the subscription period, the change is notified from the notifier to the subscriber.

  The first relay server A applies for subscription of relay server information to the second relay server B (step S24: Subscribe ()). When there is a change in the state indicated by the relay server information, the control unit 122B of the second relay server B updates the relay server information held by itself. Then, the second relay server B transmits the updated relay server information to the first relay server A. The control unit 122A of the first relay server A updates the relay server information using the relay server information transmitted from the second relay server B. The first relay server A notifies the first client terminal A1 that the relay server information has been updated (step S25: Notify (relay server information)), and further notifies the second client terminal A2 (step S26: Notify). (Relay server information)).

  Next, the first relay server A applies to the third relay server C for subscription of relay server information (step S27: Subscribe ()). When the state indicated by the relay server information is changed, the control unit 122C of the third relay server C updates the relay server information held by itself. Then, the third relay server C transmits the updated relay server information to the first relay server A. The control unit 122A of the first relay server A updates the relay server information using the relay server information transmitted from the third relay server C. The first relay server A notifies the first client terminal A1 that the relay server information has been updated (step S28: Notify (relay server information)), and further notifies the second client terminal A2 (step S29: Notify). (Relay server information)).

  The second relay server B applies for subscription of relay server information to the first relay server A (step S30: Subscribe ()). When the state indicated by the relay server information is changed, the control unit 122A of the first relay server A updates the relay server information held by itself. Then, the first relay server A transmits the updated relay server information to the second relay server B. The control unit 122B of the second relay server B updates the relay server information using the relay server information transmitted from the first relay server A. The second relay server B notifies the third client terminal B1 that the relay server information has been updated (step S31: Notify (relay server information)).

  The second relay server B applies for subscription of relay server information to the third relay server C (step S32: Subscribe ()). When the state indicated by the relay server information is changed, the control unit 122C of the third relay server C updates the relay server information held by itself. Then, the third relay server C transmits the updated relay server information to the second relay server B. The control unit 122B of the second relay server B updates the relay server information using the relay server information transmitted from the third relay server C. The second relay server B notifies the third client terminal B1 that the relay server information has been updated (step S33: Notify (relay server information)).

  The third relay server C applies for subscription of relay server information to the second relay server B (step S34: Subscribe ()). When the state indicated by the relay server information is changed, the control unit 122B of the second relay server B updates the relay server information held by itself. Then, the second relay server B transmits the updated relay server information to the third relay server C. The control unit 122C of the third relay server C updates the relay server information using the relay server information transmitted from the second relay server B. The third relay server C notifies the fourth client terminal C1 that the relay server information has been updated (step S35: Notify (relay server information)), and further notifies the fifth client terminal C2 (step S36: Notify). (Relay server information)).

  The third relay server C applies for subscription of relay server information to the first relay server A (step S37: Subscribe ()). When the state indicated by the relay server information is changed, the control unit 122A of the first relay server A updates the relay server information held by itself. Then, the first relay server A transmits the updated relay server information to the third relay server C. The control unit 122C of the third relay server C updates the relay server information using the relay server information transmitted from the first relay server A. The third relay server C notifies the fourth client terminal C1 that the relay server information has been updated (step S38: Notify (relay server information)), and further notifies the fifth client terminal C2 (step S39: Notify). (Relay server information)).

  Through the above processing, the first relay server A, the second relay server B, and the third relay server C immediately share the updated relay server information even when the relay server information is updated. Therefore, the first relay server A, the second relay server B, and the third relay server C can always know the activation status of other relay servers, the type of client terminal connected to the relay server, and the logon status.

1.9-3 Summary of information sharing In the relay communication system, when the increase / decrease state and connection state of the LAN and the client terminal change, when one relay server recognizes the state change, the relay group Information, relay server information, and client terminal information are updated immediately.

  Then, the one relay server immediately notifies the other relay servers described in the relay group information and the relay server information that the relay group information and the relay server information are updated. Further, the one relay server immediately notifies the end of the client described in the client terminal information that the relay group information and the relay server information are updated.

  However, if one relay server determines that another relay server is not connected even if the other relay server is described in the relay group information and relay server information, it immediately notifies the other relay server. Never do. Furthermore, even if the client terminal is described in the client terminal information, the one relay server does not immediately notify the client terminal when it is determined that the client terminal is not connected.

  Thereby, the information about the increase / decrease state and the connection state of the LAN and the client terminal is shared in real time as the entire relay communication system.

1.10 Flow of Remote File Control Information Sharing and Data Storage Processing Next, with reference to FIG. 17, the relay group information, relay server information, and client terminal information are stored in the relay server and client terminal belonging to the first relay group. The flow of remote file control information sharing and data storage processing in the case of sharing will be described. FIG. 17 shows a flow of remote file control information sharing and data storage processing.

1.10-1 Sharing of Remote File Control Information First, sharing of remote file control information will be described.
The control unit 222A1 of the first client terminal A1 notifies the first relay server A of the remote file control information (Step S41: Notify_Capture (folder A)). At this time, the control unit 221A1 stores the remote file control information in the remote file control information storage unit 232A1. Here, remote file control information is created by the control unit 222A1, and the remote file control information includes “folderA” as the virtual folder name of the common storage area, and the identification information of the first client terminal A1 as “OWNER” Is included. Further, it is assumed that the remote file control information includes an “ID” that is created by the control unit 222A1 and identifies the common storage area.

  The control unit 122A of the first relay server A stores the remote file control information in the remote file control information storage unit 131A. Subsequently, the control unit 122A refers to the relay server information and determines a relay server to be notified of the notified remote file control information. Specifically, the control unit 122A of the first relay server A refers to “stat” of the relay server information, and the relay server to be notified of the second relay server B and the third relay server C that are logged on decide. Thereby, the control unit 122A notifies the second relay server B of the remote file control information (step S41.1: Notify_Capture (folder A)).

  After the remote file control information is notified, the control unit 122B of the second relay server B stores the remote file control information in the remote file control information storage unit 131B, and returns an OK response to the first relay server A. Subsequently, the control unit 122B refers to the relay server information and determines a client terminal to be notified of the remote file control information. Specifically, the control unit 122B refers to “site” of the relay server information and determines that the third client terminal B1 in the logon state is a client terminal to be notified. Thereby, the second relay server B notifies the third client terminal B1 of the remote file control information (step S41.1.1: Notify_Capture (folder A)).

  After the remote file control information is notified, the control unit 222B1 of the third client terminal B1 stores the remote file control information in the remote file control information storage unit 232B1, and returns an OK response to the second relay server B. After receiving the OK response, the second relay server B returns an OK response to the first relay server A.

  Further, the first relay server A refers to the relay server information, and in addition to the first client terminal A1 that has notified the first relay server A of the remote file control information, the first relay server A should notify the remote file control information within the same LAN. Determine if there is a terminal. Here, the control unit 122A determines that the second client terminal A2 is a client terminal to be notified. Thereby, the control unit 122A notifies the second client terminal A2 of the remote file control information (step S41.2: Notify_Capture (folder A)).

  The control unit 222A2 of the second client terminal A2 notified of the remote file control information stores the remote file control information in the remote file control information storage unit 232A2, and returns an OK response to the first relay server A.

  Similar to the second relay server B, the first relay server A notifies the third relay server C of the remote file control information (step S41.3: Notify_Capture (folder A)).

  The control unit 122C of the third relay server C stores the remote file control information in the remote file control information storage unit 131C. Subsequently, the control unit 122C refers to the relay server information and determines a client terminal to be notified of the remote file control information. Here, the control unit 122C determines that the fourth client terminal C1 and the fifth client terminal C2 are to be notified client terminals. As a result, the third relay server C notifies the fourth client terminal C1 of the remote file control information (step S41.3.1: Notify_Capture (folder A)). The third relay server C notifies the fifth client terminal C2 of the remote file control information (step S41.3.2: Notify_Capture (folder A)). The control units 222C1 and 222C2 of the fourth client terminal C1 and the fifth client terminal C2 store the remote file control information in the remote file control information storage units 232C1 and 232C2, respectively, and return an OK response to the third relay server C. .

  When the first relay server A receives OK responses from all the relay servers and client terminals that have notified the remote file control information, the first relay server A returns an OK response to the first client terminal A1.

  As a result of the above processing, all the relay servers and client terminals in the first relay system that are logged on based on the relay server information have common remote file control information.

1.10-2 Data Storage Procedure Flow Next, the data storage processing flow after the remote file control information is shared by all relay servers and client terminals in the first relay system will be described in two embodiments. Will be described below.

1.10-2-1 First Example First, communication data transferred from the third client terminal B1 to the second client terminal A2 via the media session is stored in the common storage area of the first client terminal A1. A case will be described as an example.

(1) Notification of data storage instruction The control unit 122B of the second relay server B notifies the third client terminal B1 of the data storage instruction by the operation of the administrator of the second relay server B (Step S1). S42: Notify_Capture (clientB1, folderA)). Specifically, the administrator of the second relay server B has a common storage area called a virtual folder “folderA” in the first client terminal A1 based on the remote file control information stored in the remote file control information storage unit 131B. Can be confirmed. Therefore, the second relay server B notifies the third client terminal B1 of an instruction to save the communication data transferred from the third client terminal B1 to another client terminal in “folderA”.
Here, an example has been described in which the second relay server B connected in the same LAN as the second client terminal B1 notifies the data storage instruction. However, the present invention is not limited to this example, and the first relay server A, the third relay server C, or a client terminal other than the second client terminal B1 instructs the third client terminal B1 to store data. May be.
Receiving the data storage instruction, the third client terminal B1 returns an OK response to the second relay server B.

(2) Establishing a Data Communication Session Assume that after receiving an instruction to store data, the third client terminal B1 needs to communicate with the second client terminal A2. For example, the user of the third client terminal B1 confirms that communication with the second client terminal A2 is possible by referring to the relay server information, and instructs to transfer data to the second client terminal A2. To the third client terminal B1.

  Then, the third client terminal B1 establishes a data communication session with the second client terminal A2 as follows.

  First, the control unit 222B1 of the third client terminal B1 refers to the relay server information and makes a start request for establishing a media session to the second relay server B (step S43: Invite (clientA2, clientB1) ). This INVITE command includes designation of the third client terminal B1 as the transmission source and the second client terminal A2 as the transmission destination.

  After receiving the start request, the control unit 122B of the second relay server B refers to the relay server information and makes a start request for establishing a media session to the first relay server A (step S43.1). : Invite (clientA2, clientB1)). Subsequently, the control unit 122A of the first relay server A makes a start request for establishing a media session to the second client terminal A2 (step S43.1.1: Invite (client A2, client B1)).

  When an OK response is returned from the second client terminal A2 to the third client terminal B1 via the first relay server A and the second relay server B, the third client terminal B1 transmits an ACK to the second relay server B. (Step S44: ACK ()). The second relay server B transmits ACK to the first relay server A (step S44.1: ACK ()). The first relay server A transmits ACK to the second client terminal A2 (step S44.1.1: ACK ()).

  When the second client terminal A2 receives the ACK, a media session is established between the third client terminal B1 and the second client terminal A2 via the first relay server A and the second relay server B. That is, it is possible for the third client terminal B1 and the second client terminal A2 to transfer communication data bidirectionally via the media session.

(3) Establishment of Remote File Control Session Next, the third client terminal B1 establishes a remote file control session with the first client terminal A1 based on the data storage instruction received in step S42.

  The control unit 222B1 of the third client terminal B1 receives an instruction indicating that the common storage area for storing communication data is the virtual folder “folderA” in response to the data storage instruction. Further, the control unit 222B1 can confirm that “OWNER” of “folderA” is the first client terminal A1 based on the remote file control information stored in the remote file control information storage unit 232B1. Furthermore, the control unit 222B1 can confirm from the relay server information that communication with the first client terminal A1 is possible via the first relay server A.

  Therefore, the control unit 222B1 of the third client terminal B1 makes a start request for establishing a media session with the first client terminal A1 to the second relay server B (step S45: Invite (clientA1, clientB1)). This Invite command includes designation of the third client terminal B1 as a transmission source of communication data and the first client terminal A1 as a transmission destination. The control unit 122B of the second relay server B that has received the start request refers to the relay server information and makes a start request for establishing a media session to the first relay server A (step S45.1: step S45.1). Invite (clientA1, clientB1)). The control unit 122A of the first relay server A refers to the relay server information and makes a start request for establishing a media session to the first client terminal A1 (step S45.1.1: Invite (client A1, clientB1)).

  When an OK response is returned from the first client terminal A1 to the third client terminal B1 via the first relay server A and the second relay server B, the third client terminal B1 transmits an ACK to the second relay server B. (Step S46: ACK ()). The second relay server B transmits ACK to the first relay server A (step S46.1: ACK ()). The first relay server A transmits ACK to the first client terminal A1 (step S46.1.1: ACK ()).

  When the first client terminal A1 receives the ACK, a media session is established between the third client terminal B1 and the first client terminal A1 via the second relay server B and the first relay server A. That is, it is possible for the third client terminal B1 and the first client terminal A1 to transfer communication data bidirectionally via the media session.

  The session establishment in step S45 and step S46 may be performed in parallel with the media session establishment in step S43 and step S44.

(4) Data storage process When a media session is established between the third client terminal B1 and the first client terminal A1, the control unit 222B1 of the third client terminal B1 creates a file for the first client terminal A1. An instruction is notified (step S47: createfile (ssn1 / capture1.cap)).

  As described above, “folderA” indicated in the remote file control information is a virtual folder name indicating the common storage area, and does not indicate an actual storage location. Therefore, it is unknown to the third client terminal B1 where the existing common storage area is. Further, the third client terminal B1 cannot directly operate the common storage area in the first client terminal A1.

  Therefore, the control unit 222B1 notifies the first client terminal A1 of the createfile command. In this way, by notifying the createfile command, the control unit 222B1 requests the first client terminal A1 that is “OWNER” of “folderA” to create a real file as a common storage area. Here, the control unit 222B1 creates a folder “ssn1” and makes a request to create a file “capture1.cap” in the folder.

  The control unit 222A1 of the first client terminal A1 creates a file in the common storage area based on the file creation request. That is, the control unit 222A1 creates a folder “ssn1” in the communication data storage unit 233A1 using an OS (operation system) incorporated in the terminal, and calls “capture1.cap” in the folder. Create a file. Subsequently, the control unit 222A1 returns an OK response to the third client terminal B1. At this time, the newly created “capture1.cap” is in an open state.

  Thereafter, the third client terminal B1 starts to transfer communication data to the second client terminal A2 (step S48: send (data)). The second client terminal A2 that has received the communication data notifies the third client terminal B1 that the data has been received by sending recv (data).

  The controller 222B1 of the third client terminal B1 that has transferred the communication data notifies the first client terminal A1 of the writefile command together with the communication data transferred in step S48 (step S49: writefile ( data)). The writefile command is used to notify an instruction to write communication data to be notified together in a file created in response to a file creation request.

  Upon receiving the writefile command, the control unit 122A of the first client terminal A1 writes and saves communication data in “capture1.cap”. Thereafter, the first client terminal A1 returns an OK response to the third client terminal B1.

  Thereafter, when data is newly transferred from the third client terminal B1 to the second client terminal A2 (step S50: send (data)), the second client terminal A2 transmits the data to the third client terminal B1. The receipt of data is notified by sending recv (data). At this time, the third client terminal B1 sends a writefile command to the first client terminal A1 together with the communication data newly transferred to the second client terminal A2 (step S51: writefile (data)). The first client terminal A1 that has received the writefile command receives the capture1. The received communication data is written and saved in the cap file. The first client terminal A1 returns an OK response to the third client terminal B1.

  When the transfer of the communication data is completed, the third client terminal B1 notifies the second client terminal A2 of a connection end request (Step S52: BYE ()). When the second client terminal A2 notified of the connection termination request returns an OK response, the connection is actually terminated.

  The third client terminal B1 notifies the first client terminal A1 of a file close request (step S53: closefile ()). The first client terminal A1 notified of the file close request receives the capture1. The cap file is closed and an OK response is returned to the third client terminal B1.

Through the above processing, communication data between the third client terminal B1 and the second client terminal A2 is captured in the common storage area capture1. It can be saved in a cap file.
In the above description, every time communication data is transferred from the third client terminal B1 to the second client terminal A2, the communication data is captured1.capture1. The example preserve | saved at a cap file was given. However, after the transfer of the plurality of communication data between the third client terminal B1 and the second client terminal A2 is completed, the plurality of communication data is captured1. It may be written in a cap file.

  1.10-2-2 Second Example In the second example, transfer data transferred by the second client terminal B1 to the third client terminal C1 is stored in the common storage area of the first client terminal A1. That is, a client terminal having a common storage area, a client terminal that transfers communication data, and a client terminal that receives communication data are all connected in different LANs. Otherwise, the second embodiment has the same configuration as the first embodiment described above, and the same processing is performed. Hereinafter, processing different from the first embodiment will be described in detail.

  FIG. 18 is a diagram showing the flow of remote file control information sharing and data storage processing in the second embodiment.

  In steps S61 to S62, the same processing as in steps S41 to S42 of the first embodiment is performed, and thus the description thereof is omitted.

  Assume that the third client terminal B1 that has received the data storage instruction in step S62 needs to communicate with the fourth client terminal C1. Then, the third client terminal B1 establishes a data communication session with the fourth client terminal C1.

  First, the control unit 222B1 of the third client terminal B1 refers to the relay server information and makes a start request for establishing a media session to the second relay server B (step S63: Invite (clientC1, clientB1) ). This INVITE command includes designation of the third client terminal B1 as the transmission source and the fourth client terminal C1 as the transmission destination.

  The control unit 122B of the second relay server B that has received the start request refers to the relay server information and makes a start request for establishing a media session to the third relay server C (step S63.1: Invite. (ClientC1, clientB1)). The control unit 122C of the third relay server C makes a start request for establishing a media session to the fourth client terminal C1 (step S63.1.1: Invite (client C1, client B1)).

  When an OK response is returned from the fourth client terminal C1 to the third client terminal B1 via the third relay server C and the second relay server B, the third client terminal B1 transmits an ACK to the second relay server B. (Step S64: ACK ()). The second relay server B transmits ACK to the third relay server C (step S64.1: ACK ()). The third relay server C transmits ACK to the fourth client terminal C1 (step S64.1.1: ACK ()).

  When the fourth client terminal C1 receives the ACK, a media session is established between the third client terminal B1 and the fourth client terminal C1 via the third relay server C and the second relay server B. That is, it is possible for the third client terminal B1 and the fourth client terminal C1 to transfer communication data bidirectionally via the media session.

  Next, as in steps S45 to S46 of the first embodiment, the third client terminal B1 establishes a remote file control session with the second client terminal A1 (steps S65 to 66). This session establishment may be performed in parallel with the media session establishment in steps S63 to S64.

  Similarly to step S47 in the first embodiment, the control unit 222B1 of the third client terminal B1 notifies the first client terminal A1 of a file creation instruction (step S67: createfile (ssn / capture1.cap). ). The control unit 222A1 of the first client terminal A1 uses an OS (operation system) incorporated in the terminal itself, and the communication data storage unit 233A1 has a folder ssn1 and a file “capture1.cap” in the folder. Create At this time, “capture1.cap”, which is a newly created file, is in an open state. Thereafter, the control unit 222A1 returns an OK response to the third client terminal B1.

  In such a state, the third client terminal B1 starts to transfer communication data to the fourth client terminal C1 (step S68: send (data)). The fourth client terminal C1 that has received the communication data notifies the third client terminal B1 that the data has been received by sending recv (data).

  Subsequently, the third client terminal B1 notifies the first client terminal A1 of the writefile command together with the communication data transferred in step S68, similarly to step S49 in the first embodiment (step S69). : Writefile (data)). The first client terminal A1 that has received the writefile command receives the capture1. Communication data is written and stored in the cap file. The first client terminal A1 returns an OK response to the third client terminal B1.

Thereafter, when data is newly transferred from the third client terminal B1 to the fourth client terminal C1 (step S70: send (data)), the fourth client terminal C1 transmits to the third client terminal B1. Sends recv (data) and notifies receipt of data. Then, the third client terminal B1 sends a writefile command to the first client terminal A1 together with the communication data newly transferred to the fourth client terminal C1 (step S71: writefile (data)). The first client terminal A1 that has received the writefile command receives the capture1. The received communication data is written and stored in the cap file. The first client terminal A1 returns an OK response to the third client terminal B1.
The subsequent steps S72 to S73 are the same as the steps S52 to 53 of the first embodiment.

The second embodiment performing the above processing can be used in the following remote maintenance system.
For example, in FIG. 1, the third LAN 3 is a user network used by the user. Further, it is assumed that the first LAN 1 and the second LAN 2 are networks used by a maintenance company that performs remote maintenance of the third LAN 3. The first LAN 1 is assumed to be a call center that accepts inquiries from users, and the second LAN 2 is assumed to be a maintenance center connected to a computer of a maintenance company serviceman.

In this case, when some trouble occurs in the fourth client terminal C1 used by the user, the service person uses the third client terminal B1 to perform remote maintenance of the fourth client terminal C1.
At this time, the service person uses the relay system described above to transmit communication data between the fourth client terminal C1 to be maintained and the third client terminal B1 used by the service person in the call center. It can be saved in the common storage area of one client terminal A1. Therefore, for example, even when the storage area of the client terminal used by the service person is small, communication data with the client terminal used by the user can be stored in the storage area of the client terminal in the call center.

1.11 Effects According to this Embodiment In the relay communication system according to this embodiment, a storage area can be shared within the same relay group by referring to shared relay server information and remote file control information. Therefore, communication data transferred from a client terminal can be stored in a common storage area set in a client terminal that is different from the client terminal that performs communication data transfer among a plurality of client terminals in the same relay group. become able to. Further, any relay server and client terminal can be instructed to store communication data transferred from the client terminal by referring to the shared relay server and remote file control information as long as they are in the same relay group. It is also possible to do from. Accordingly, the storage area can be shared within the same relay group, and the storage of communication data according to the needs of the user can be realized.
2. Second embodiment

  FIG. 19 shows a relay communication system according to the second embodiment. The relay communication system according to the present embodiment is not a relay group including a plurality of relay servers, but includes a relay server and a plurality of client terminals connected to the relay server according to the first embodiment. It is the same as that of the structure. Therefore, the same reference numerals are given to the configurations already described, and the description thereof is omitted. Hereinafter, when the relay server information and the client terminal information are shared in the first relay server A, the first client terminal A1, and the second client terminal A2 in the first LAN 1, the remote file control information is further shared and the data is stored. An example in which processing is performed will be described.

As illustrated in FIG. 19, the relay communication system according to the second embodiment includes a first relay server A. The first relay server A is connected to the first client terminal A1 and the second client terminal A2.
FIG. 20 shows the flow of remote file control information sharing and data storage processing in this embodiment.
In step S81, based on the relay server information, a process in which the first relay server A, the first client terminal A1, and the second client terminal A2 hold common remote file control information is performed. Since this process is the same as step S41 of the first embodiment, a description thereof will be omitted.
Next, the control unit 122A of the first relay server A notifies the first client terminal A2 of a data storage instruction by the operation of the administrator of the first relay server A (step S82: Notify_Capture (client A2, client A2, folderA)).

Thereafter, it is assumed that the second client terminal A2 that has received the data storage instruction needs to communicate with the first client terminal A1. Then, the second client terminal A2 establishes a data communication session with the first client terminal A1 via the first relay server A (steps S83 to 84). Since this process is the same as steps S43 to S44 in the first embodiment, a description thereof will be omitted.
Similarly to steps S45 to S46 of the first embodiment, the second client terminal A2 establishes a remote file control session with the first client terminal A1 (steps S85 to 86). The session establishment may be performed in parallel with the media session establishment in steps S83 to S84.

  In step S87, the control unit 222A2 of the second client terminal A2 notifies the first client terminal A1 of a file creation instruction as in step S47 of the first embodiment (step S87: createfile (ssn / capture1. cap)). The control unit 222A1 of the first client terminal A1 uses an OS (operation system) incorporated in the terminal itself, and the communication data storage unit 233A1 has a folder named ssn1 and a file named “capture1.cap” in the folder. Create At this time, “capture1.cap”, which is a newly created file, is in an open state.

  Next, the second client terminal A2 starts to transfer communication data to the first client terminal A1 (step S88: send (data)). The first client terminal A1 that has received the communication data notifies the second client terminal A2 that the data has been received by sending recv (data).

  Subsequently, the second client terminal A2 notifies the first client terminal A1 of the writefile command together with the communication data transferred in step S88, similarly to step S49 in the first embodiment (step S89). : Writefile (data)). The first client terminal A1 that has received the writefile command receives the capture1. Communication data is written and stored in the cap file.

Thereafter, when data is newly transferred from the second client terminal A2 to the first client terminal A1 (step S90: send (data)), the first client terminal A1 transmits to the second client terminal A2. Sends recv (data) and notifies receipt of data. Then, the second client terminal A2 sends a writefile command to the first client terminal A1 together with the communication data newly transferred to the first client terminal A1 (step S91: writefile (data)). The first client terminal A1 that has received the writefile command receives the capture1. The received communication data is written and stored in the cap file.
The subsequent steps S92 to S93 are the same as the steps S52 to 53 of the first embodiment.
Through the above processing, the communication data transferred from the second client terminal A2 to the first client terminal A1 is captured1. Saved in a cap file.

  As described above, in the relay communication system according to the present embodiment, the storage area can be shared between client terminals connected to the same relay server by referring to the shared relay server information and remote file control information. . Even if the storage area of the second client terminal A2 that performs data transfer is small, the communication data transferred from the second client terminal A2 is stored in the shared storage area set in the first client terminal A1. be able to.

3. Other Embodiments Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

  (1) In the above example, one remote file control information is shared by one or more relay servers and a plurality of client terminals connected to one or more relay servers. However, the present invention is not limited to this example, and a plurality of remote file control information may be shared.

  (2) Not only communication data transferred from a client terminal that has received an instruction to save data, but also communication data transferred to the client terminal can be stored in the storage area.

  (3) The data storage instruction may be issued from the terminal itself. That is, in the first example of the above embodiment, an example has been described in which the second relay server B instructs the third client terminal B1 to store data (see step S42 in FIG. 17). However, the third client terminal B1 may include a data operation notification unit, and may instruct the data storage to the own terminal without receiving a data storage instruction from another terminal as in step S42.

  (4) The data operation notifying unit 126 of the relay server not only instructs data storage, but also instructs to create a new file in the common storage area and / or a file already created in the common storage area An instruction to operate can be notified to the client terminal.

  For example, in the first example of the first embodiment described above, the data operation notifying unit 126B of the second relay server B sends a file creation instruction and / or file to the third client terminal B1 that has notified the data storage. An operation instruction can be further notified. Specifically, the data operation notifying unit 126B refers to the relay server information and the remote file control information in the same manner as in the case of instructing data storage, and creates a new file in the common storage area for the third client terminal B1. And / or opening instructions and editing instructions for files already created in the common storage area can be notified.

  At this time, if the file creation instructing unit 225B1 of the third client terminal B1 receives the file creation instruction, the file creation instructing unit 225B1 sends the first client terminal A1 to the first client terminal A1 through the remote file control session established in step S46. Then, a request for creating a new file in the common storage area is notified. Subsequently, the file creation unit 226A1 of the first client terminal A1 that has received the file creation request creates a file in the common storage area using the OS (operation system) of its own terminal.

  On the other hand, if a file operation instruction such as a file opening instruction and / or an editing instruction has been received, the data operation instruction unit 227B1 of the third client terminal B1 sends a request to the first client terminal A1 in step S46. Instructs file operations via an established remote file control session. Subsequently, the data operation unit 228A1 of the first client terminal A1 operates the file in the common storage area based on the received operation instruction.

  Similarly to the above, as long as the relay server and the client terminal share the relay server information and the remote file control information, not only the second relay server B but also any relay server or client terminal can generate the file creation instruction and / or Alternatively, a file operation instruction can be performed.

  As described above, an arbitrary client terminal to which a common storage area is set performs file creation and / or file operation in the common storage area on behalf of. Therefore, as long as the relay server and the client terminal share the relay server information and the remote file control information, it is possible to access the common storage area from any relay server and client terminal, create a file, and operate the file. .

  The present invention can be widely applied to one or more relay servers and a plurality of client terminals used in a relay communication system.

1 First LAN
2 Second LAN
3 Third LAN
4 WAN
30 relay server information 40 client terminal information 50 client terminal information 60 client terminal information 70 remote file control information 121 interface 122 control unit 127 database storage unit 221 interface 222 control unit 229 database storage unit A first relay server B second relay server C 3rd relay server A1 1st client terminal A2 2nd client terminal B1 3rd client terminal C1 4th client terminal C2 5th client terminal

Claims (16)

Relay server information having start information of one or more relay servers, start information and registration information of a plurality of client terminals connected to the one or more relay servers, the one or more relay servers and the plurality of clients A relay server information storage unit shared and stored between terminals;
Remote file control information having information related to the common storage area set in any one of the plurality of client terminals and identification information of the client terminal in which the common storage area is set is based on the relay server information. A remote file control information storage unit shared and stored among one or more relay servers and the plurality of client terminals;
A data communication session establishment unit for establishing a data communication session for transferring communication data from a client terminal different from the client terminal in which the common storage area is set among the plurality of client terminals;
Remote establishing a remote file control session for storing the communication data in the common storage area between the client terminal in which the common storage area is set and the client terminal that transfers the communication data through the data communication session A file control session establishment unit;
A relay server comprising:   The relay server according to claim 1, wherein the client terminal in which the common storage area is set and the client terminal that transfers the communication data are directly connected to the same relay server. Can communicate with one or more relay servers,
A relay group information storage unit in which relay group information indicating that the relay group and one or more communicable relay servers constitute a relay group is shared between the relay servers in the relay group; ,
The relay server information and the remote file control information are shared and stored between the relay server and the client terminal in the relay group,
The relay server according to claim 1, wherein the client terminal in which the common storage area is set and the client terminal that transfers the communication data are directly connected to different relay servers in the relay group.   The data operation notifying unit that instructs the client terminal that transfers the communication data to store the communication data in the common storage area based on the relay server information and the remote file control information. The relay server in any one of -3.   The data operation notifying unit further notifies an instruction to create a file in the common storage area to a client terminal that transfers the communication data based on the relay server information and the remote file control information. 4. The relay server according to 4.   The data operation notifying unit further notifies an operation instruction of a file in the common storage area to a client terminal that transfers the communication data based on the relay server information and the remote file control information. The relay server according to any one of 4 to 5. A client terminal that functions as one of a plurality of client terminals connected to one or more relay servers,
Relay server information including startup information of the one or more relay servers and startup information and registration information of the plurality of client terminals is shared and stored between the one or more relay servers and the plurality of client terminals. Relay server information storage unit,
Remote file control information having information related to a common storage area set in a client terminal different from its own terminal among the plurality of client terminals, and identification information of the client terminal in which the common storage area is set, A remote file control information storage unit shared and stored between the one or more relay servers and the plurality of client terminals based on server information;
Based on the remote file control information, established to save communication data transferred from the own terminal by a data communication session between the own terminal and the client terminal to which the common storage area is set in the common storage area. A file creation instruction unit that requests creation of a file in the common storage area via a remote file control session,
A client terminal comprising:   The client terminal according to claim 7, wherein, out of the one or more relay servers, the client terminal is directly connected to the same relay server as the relay server to which the client terminal in which the common storage area is set is directly connected. Relay group information indicating that a plurality of relay servers including the one or more relay servers form a relay group is between a plurality of relay servers in the relay group and a plurality of client terminals connected to the plurality of relay servers. A relay group information storage unit shared and stored in
Sharing the relay server information and the remote file control information with client terminals connected to the plurality of relay servers in the relay group;
8. The client terminal according to claim 7, wherein the client terminal is directly connected to a relay server different from the relay server to which the client terminal in which the common storage area is set is directly connected among the plurality of relay servers.   A data operation instruction unit for instructing the client terminal having the common storage area to store the communication data in a file created at the request of the file creation instruction unit via the remote file control session; The client terminal in any one of Claims 7-9 provided.   The client terminal according to claim 10, wherein the data operation instruction unit further instructs the client terminal having the common storage area to operate the file via the remote file control session. A client terminal that functions as one of a plurality of client terminals connected to one or more relay servers,
Relay server information including startup information of the one or more relay servers and startup information and registration information of the plurality of client terminals is shared and stored between the one or more relay servers and the plurality of client terminals. Relay server information storage unit,
Remote file control information having information related to the common storage area set in the own terminal and identification information of the own terminal is based on the relay server information between the one or more relay servers and the plurality of client terminals. A remote file control information storage unit that is shared and stored; and
Established based on the remote file control information to store the communication data in the common storage area between the own terminal and a client terminal that transfers communication data through a data communication session among the plurality of client terminals. Upon receiving a file creation request via a remote file control session, a file creation unit that creates a file in the common storage area;
A client terminal comprising:   The client terminal according to claim 12, wherein, out of the one or more relay servers, the client terminal is directly connected to the same relay server as the relay server to which the client terminal that transfers the communication data is directly connected. Relay group information indicating that a plurality of relay servers including the one or more relay servers form a relay group is between a plurality of relay servers in the relay group and a plurality of client terminals connected to the plurality of relay servers. A relay group information storage unit shared and stored in
Sharing the relay server information and the remote file control information with client terminals connected to the plurality of relay servers in the relay group;
The client terminal according to claim 12, wherein, out of the plurality of relay servers, the client terminal is directly connected to a relay server different from the relay server to which the client terminal that transfers the communication data is directly connected.   When receiving an instruction to save the communication data via the remote file control session from a client terminal that transfers the communication data, the data processing unit further includes a data operation unit that saves the communication data in the created file. The client terminal in any one of Claims 12-14.   The client according to claim 15, wherein the data operation unit further operates a file in the common storage area when receiving an instruction to operate a file in the common storage area via the remote file control session. Terminal.

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