JP2012244428A - Relay server and relay communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a relay server that prevents occurrence of missing in log information by configuring the log information to have a complete form even when failed to update the log information due to a communication failure with other equipment.SOLUTION: A center terminal (relay server) 5 stores log information in association with a log information identifier of the log information. The center terminal 5 transmits/receives the log information identifier, and operates to set an identical log information identifier to log information of an identical connection job among the center terminal 5, a first maintenance terminal 9A and a first maintenance target terminal 7A. During execution of a connection job, the center terminal 5 receives log information together with a log information identifier from the first maintenance terminal 9A, and updates the log information. Upon detection of a connection job that fails in updating log information on the way, the center terminal 5 updates the log information by capturing the same log information from the first maintenance target terminal 7A on the basis of the log information identifier of the log information of the connection job.

Description

  The present invention mainly relates to a relay server that enables communication between terminals connected to different LANs (Local Area Networks).

  Conventionally, a communication technique called a virtual private network (VPN) is known. This VPN is used, for example, for applications in which terminals connected to LANs at a plurality of bases provided for each region communicate via the Internet. If the VPN is used, another remote LAN can be used as if it were a directly connected network. The VPN is used for, for example, a remote maintenance of a terminal provided at another base. A maintenance target terminal can receive remote maintenance or the like from a device connected to another LAN at a remote location.

  Patent Document 1 discloses a management system via this type of network. This management system is constructed so as to straddle building owners, equipment maintenance companies, and electrical equipment manufacturers. The building owner installs electrical equipment and an operation control management device for controlling the electrical equipment in the building owned by the building owner. This operation control management device is configured to be accessible via a network such as the Internet. The equipment maintenance company is entrusted with the management of the electrical equipment by the building owner, and has obtained permission from the electrical equipment manufacturer to access the operation control management device. Therefore, the equipment maintenance company can manage the electrical equipment from a remote location via a network such as the Internet.

JP 2003-223521 A

  By the way, in the management system like the above-mentioned patent document 1, the contents (log information) of the maintenance work performed by the maintenance side device on the maintenance side device can be collectively stored in the management side device. Done. This log information is transmitted from the maintenance device to the management device when the maintenance work is completed, for example.

  However, for example, when a failure occurs in the management device and the management device becomes unable to communicate with other devices, the management device cannot receive the log information. In this case, the log information stored on the management side is lost.

  The present invention has been made in view of the above circumstances, and its purpose is to complete the log information even when the update of the log information fails due to the inability to communicate with other devices. Thus, it is to provide a relay server that prevents log information from being lost.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the 1st viewpoint of this invention, the relay server with a management function of the following structures is provided. That is, the relay server with a management function includes an operator list storage unit, a connection job creation unit, a candidate job list transmission unit, a log information storage unit, a log information identifier transmission / reception unit, and a log information management unit. . The operator list storage unit stores a list of operators that can log in to the relay communication system including the relay server and other relay servers. The connection job creation unit creates a connection job in which a connected relay server is associated with an operator as a connection candidate that is a candidate that can be permitted to connect to the connected relay server. The candidate job list transmission unit is a candidate job list that is a list of the connection jobs in which an operator who is logged in via the connection-side relay server is set as a connection candidate in response to a request from the connection-side relay server Is transmitted to the relay server on the connection side. The log information storage unit stores log information indicating the contents of work performed during execution of the connection job in association with a log information identifier for identifying the log information. The log information identifier transmission / reception unit transmits and receives the log information identifier, and the log information of the same connection job between itself, the connection-side relay server, and the connected-side relay server. Are set to the same log information identifier. The log information management unit receives the log information together with the log information identifier from the connection-side relay server during execution of the connection job, and updates the log information stored in the log information storage unit . When the connection job that has failed in the update of the log information is detected, the log information management unit, based on the log information identifier of the log information of the connection job, The same log information is acquired from the relay server on the connection side, and the log information stored in the log information storage unit is updated.

  As a result, even if the relay server with management function cannot communicate with the connection-side relay server during connection job execution and fails to update the log information in the middle, the corresponding log information is restored after normal communication is restored. Can be acquired from a relay server or the like on the connected side. Accordingly, it is possible to prevent the log information stored in the relay server with a management function from being lost.

  In the relay server with management function, the log information identifier transmission / reception unit receives the log information identifier set in the connected relay server, and uses the received log information identifier as the connecting relay server. It is preferable that the same log information identifier is set in the log information of the same connection job.

  As a result, the log information identifier used in the connected relay server can also be used in the relay server with management function and the connected relay server.

  According to a second aspect of the present invention, a connection-side relay server having the following configuration is provided. That is, the connection-side relay server includes a management destination information storage unit, a selected job notification unit, a routing session establishment unit, a routing control unit, a log information storage unit, a log information transmission unit, and a log information deletion unit. And comprising. The management destination information storage unit includes an operator that can log in to a relay communication system including itself and other relay servers, and a connected side that is set as a connection candidate that can be permitted to connect to the operator. The identification information of the relay server with management function, which is the storage destination of the connection job that is associated with the relay server, is stored. The selected job notification unit receives a candidate job list, which is a list of the connection jobs set as connection candidates by an operator who is logged in through the selected job notification unit, from the candidate job list. The connection job selected from is notified to the relay server with management function. When the routing session establishment unit receives that the execution of the selected connection job is permitted, the routing session establishment unit establishes a routing session used for packet routing with the connected relay server indicated by the connection job. Establish. The routing control unit performs routing control based on the routing session. The log information storage unit has log information indicating the contents of work performed during the execution of the connection job, the same as the log information identifier set in the relay server with management function and the relay server on the connected side. Temporarily stored in association with the log information identifier. The log information transmission unit updates the log information stored in the log information storage unit to the log information in order to update the log information stored in the connected relay server and the relay server with management function. Send with identifier. The log information deletion unit deletes the log information in the log information storage unit when the work performed during the execution of the connection job is completed.

  This reduces the risk of leaking highly confidential log information to other operators because the log information of the connection job is deleted from the relay server every time work done during the execution of the connection job is completed. Can be made.

  According to the 3rd viewpoint of this invention, the relay communication system of the following structures is provided. That is, the relay communication system includes a relay server with a management function, a connection-side relay server, and a connected-side relay server. The connection-side relay server and the connected-side relay server can communicate with a relay server with a management function. The relay server with a management function includes an operator list storage unit, a connection job creation unit, a candidate job list transmission unit, a log information storage unit, a log information identifier transmission / reception unit, and a log information management unit. The operator list storage unit stores a list of operators that can log in. The connection job creation unit creates a connection job that associates the connected relay server with an operator as a connection candidate that is a candidate that can be permitted to connect to the connected relay server. . The candidate job list transmission unit is a candidate job that is a list of the connection jobs in which an operator who is logged in through the connection-side relay server is set as a connection candidate in response to a request from the connection-side relay server The list is transmitted to the relay server on the connection side. The log information storage unit stores log information indicating the contents of work performed during execution of the connection job in association with a log information identifier for identifying the log information. The log information identifier transmission / reception unit transmits and receives the log information identifier, and the log information of the same connection job between itself, the connection-side relay server, and the connected-side relay server. Are set to the same log information identifier. The log information management unit receives the log information together with the log information identifier from the connection-side relay server during execution of the connection job, and updates the log information stored in the log information storage unit . When the connection job that has failed in the update of the log information is detected, the log information management unit, based on the log information identifier of the log information of the connection job, The same log information is acquired from the relay server on the connection side, and the log information stored in the log information storage unit is updated.

  As a result, even if the relay server with a management function becomes unable to communicate with the relay server on the connection side during execution of the connection job and fails to update the log information, for example, after recovery from the communication failure, Corresponding log information can be acquired from a relay server or the like. Therefore, it is possible to realize a relay communication system that can prevent the log information stored in the relay server with a management function from being lost.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows the whole structure of the relay communication system which concerns on one Embodiment of this invention. The functional block diagram which shows the structure of a center terminal. The figure which shows the content of an operator list. The figure which shows the content of the maintenance terminal list. The figure which shows the content of a to-be-maintained terminal list. The figure which shows the content of a connection job list. The figure which shows the content of log information. The functional block diagram which shows the structure of a 1st maintenance terminal. The functional block diagram which shows the structure of a 1st to-be-maintained terminal. The sequence diagram which shows the flow of a process when a connection job is produced. The sequence diagram which shows the flow of the process performed at the time of login to the relay communication system by an operator. The sequence diagram which shows the flow of the process performed at the time of selection of the connection job by an operator. The sequence diagram which shows the flow of the process performed after completion | finish of a maintenance work. The sequence diagram which shows the flow of a process in which a center terminal acquires log information from a maintenance target terminal and updates it.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a relay communication system 1 according to an embodiment of the present invention.

  As shown in FIG. 1, a relay communication system 1 is connected to a plurality of relay servers connected via a wide area network (WAN) 3 such as the Internet, and these relay servers via a LAN. And a client terminal. The relay server can communicate with other relay servers and client terminals connected to the other relay servers. The client terminal can communicate with other relay servers and client terminals connected to other relay servers via a relay server connected via a LAN.

  In the present embodiment, remote maintenance and management are performed using the relay communication system 1. In the relay communication system 1, the terminals functioning as the relay server are the center terminal 5, the first maintenance target terminal 7A, the second maintenance target terminal 7B, the first maintenance terminal 9A, and the second maintenance terminal 9B.

  The center terminal 5 is provided in the call center. A call center is a base where an operator who responds to an inquiry from the owner of a maintenance target device is enrolled. The center terminal 5 manages the access right of the maintenance terminal (or the operator who performs maintenance) to the maintenance target terminal. A center terminal operating terminal 11 as the client terminal is connected to the center terminal 5 via a LAN 13. The ID of the center terminal 5 is “Center@relaysystem.net”.

  The first maintenance target terminal 7A is provided at an installation destination of a device to be remotely maintained. A first maintenance target system 15A and a second maintenance target system 15B are connected to the first maintenance target terminal 7A via the LAN 17. The first maintenance target system 15A and the second maintenance target system 15B are a file server, a Web server, or the like that is a target of remote maintenance. The ID of the first maintenance target terminal 7A is “Target1@relaysystem.net”.

  The second maintenance target terminal 7B is provided at an installation destination of a device to be subjected to remote maintenance. A third maintenance target system 19A and a fourth maintenance target system 19B are connected to the second maintenance target terminal 7B via the LAN 21. The third maintenance target system 19A and the fourth maintenance target system 19B are a file server, a Web server, or the like that is a target of remote maintenance. The ID of the second maintenance target terminal 7B is “Target2@relaysystem.net”.

  The first maintenance terminal 9A is provided at a maintenance base where an operator who performs remote maintenance is present. A first maintenance operation terminal 23A and a second maintenance operation terminal 23B as the client terminals are connected to the first maintenance terminal 9A via the LAN 25. The ID of the first maintenance terminal 9A is “Maintenance2@relaysystem.net”.

  The second maintenance terminal 9B is provided at a maintenance base where an operator who performs remote maintenance is present. A third maintenance operation terminal 27A and a fourth maintenance operation terminal 27B as the client terminals are connected to the second maintenance terminal 9B via the LAN 29. The ID of the second maintenance terminal 9B is “Maintenance1@relaysystem.net”.

  In order for an operator at the maintenance base to perform maintenance work, it is necessary to log in to the relay communication system 1. The operator can log in to the relay communication system 1 by operating the maintenance operation terminal and inputting the ID and password. In the relay communication system 1 of this embodiment, the operator is not tied to a specific maintenance operation terminal, and can log in to the relay communication system 1 even when any maintenance operation terminal is used. After logging in to the relay communication system 1, the operator uses the maintenance operation terminal to perform remote maintenance of the maintenance target system within the range of access rights managed by the center terminal 5.

  Next, the configuration of the center terminal 5 will be described with reference to FIGS. FIG. 2 is a functional block diagram showing the configuration of the center terminal 5. 3 to 7 are diagrams showing contents stored in the database storage unit 33 of the center terminal 5.

  As shown in FIG. 2, the center terminal 5 includes an interface 35, a database storage unit 33, and a control unit 31.

  The interface 35 can communicate with a device connected to the LAN 13 using a private IP address. The interface 35 can perform communication via the WAN 3 using a global IP address.

  The database storage unit 33 includes an operator list storage unit 53, a maintenance terminal list storage unit 55, a log information storage unit 56, a maintenance target terminal list storage unit 57, and a connection job list storage unit 59.

  The operator list storage unit 53 stores, for example, an operator list 53a shown in FIG. As shown in FIG. 3A, the operator list 53a includes “ID”, “password”, and “login relay server”. In the “ID” column, an ID of an operator who can log in to the relay communication system 1 is described. In the “password” column, a password necessary for logging in to the relay communication system 1 using the ID described in the same row is described. In the “login relay server” column, when the operator has logged in to the relay communication system 1 using the ID described in the same row, the operator ID and the relay server used by the operator ( ID of the center terminal or maintenance terminal) is described. If the operator has not logged in to the relay communication system 1, the “login relay server” is blank.

  From the example of FIG. 3A, operators Op1 to Op4 are registered in the operator list, the second operator Op2 uses the center terminal 5, and the third operator Op3 uses the second maintenance terminal 9B. I understand that It can also be seen that the first operator Op1 and the fourth operator Op4 are not logged in to the relay communication system 1.

  The maintenance terminal list storage 55 stores a maintenance terminal list 55a shown in FIG. The maintenance terminal list 55a is composed of “name” and “terminal ID” describing the maintenance terminals constituting the relay communication system 1. In “Name”, a name given to the maintenance terminal is described. An appropriate name that is easy to understand, such as the installation location of the maintenance terminal (name of the maintenance base), can be given to this name. “Terminal ID” describes the ID of the maintenance terminal.

  The maintained terminal list storage unit 57 stores a maintained terminal list 57a shown in FIG. The to-be-maintained terminal list 57a includes “name” and “terminal ID” that describe the to-be-maintained terminals constituting the relay communication system 1. In “Name”, a name given to the maintenance target terminal is described. This name can be given an easy-to-understand appropriate name such as the location (company name) of the terminal to be maintained. “Terminal ID” describes the ID of the maintenance target terminal.

  The connection job list storage unit 59 stores information related to connection jobs. The connection job indicates a unit of maintenance work. The connection job is created by the center terminal 5 every time maintenance work is required for the maintenance target system, and is stored in the connection job list storage unit 59. The connection job list storage unit 59 stores a connection job list 59a including one or a plurality of connection jobs. The connection job list 59a is composed of “maintenance terminal ID”, “connection candidate ID”, and “job information” described for each connection job as shown in FIG. The “maintenance terminal ID” describes the ID of the maintenance target terminal connected to the same LAN as the maintenance target system requiring maintenance work. In “connection candidate ID”, an ID of an operator set as a candidate (connection candidate) that can be permitted to connect to the maintenance target terminal is described. The “connection candidate ID” can describe the IDs of one or more operators. “Job information” describes the state of the current connection job (for example, which operator is executing the connection job). The connection job is deleted from the connection job list 59a when the maintenance work is completed.

  From the example of FIG. 6A, it can be seen that the first connection job is created for the second maintenance target terminal 7B, and the first operator Op1 and the third operator Op3 are set as the connection candidate operators. . In the example of FIG. 6B, in addition to the first connection job, a second connection job has been created for the first maintenance target terminal 7A, and the first operator Op1 is set as a connection candidate operator. I understand that. From the example of FIG. 6C, it can be seen that the first operator Op1 is executing the second connection job.

  As shown in FIG. 7, the log information storage unit 56 stores log information indicating processing performed during execution of the connection job, together with a log information identifier as identification information of the log information. The log information is information created for each connection job, and includes the time when the process is performed, the ID of the operator who performed the process, the content of the process, and the like. The log information storage unit 56 provided in the center terminal 5 stores log information of all connection jobs executed in the relay communication system 1.

  The control unit 31 includes a CPU, a RAM, a ROM, and the like, and can execute various processes by a program read from the ROM or the like. As shown in FIG. 2, the control unit 31 includes a log information identifier transmission / reception unit 41, a log information management unit 42, a login authentication unit 43, a connection job creation unit 45, an execution determination unit 47, and a connection job list management. Unit 49, candidate job list transmission unit 51, and permission information transmission unit 52.

  The log information identifier transmission / reception unit 41 transmits / receives a log information identifier. Specifically, the log information identifier transmission / reception unit 41 can transmit, for example, the log information identifier registered in the log information storage unit 56 and receive the log information identifier created by the maintenance target terminal. It is. Thereby, the log information identifier of the log information of a certain connection job is the same between the center terminal 5, the maintenance terminal of the operator who performs the connection job, and the maintenance terminal as the connected side of the connection job. can do. The log information management unit 42 manages log information stored in the log information storage unit 56. For example, the log information management unit 42 receives the content of the processing performed during the maintenance work from the maintenance terminal, and updates the log information based on the received content.

  The connection job creation unit 45 creates the connection job when receiving a notification from the maintenance target terminal that a failure has occurred in the maintenance target system. The connection job list management unit 49 manages the connection job list 59a stored in the connection job list storage unit 59. Specifically, the connection job created by the connection job creation unit 45 is registered in the connection job list 59a, the job information in the connection job list 59a is updated, or the connection job is deleted from the connection job list 59a.

  The login authentication unit 43 collates the operator list 53a with the operator ID and password received from the maintenance terminal or the like, and determines whether or not the operator can log in. Further, the login authentication unit 43 determines whether or not login is possible based on whether or not the ID of the maintenance terminal that transmitted the operator ID or the like is included in the maintenance terminal list 55a.

  In response to a request from an operator who performs maintenance, the candidate job list transmission unit 51 extracts a list of connection jobs (candidate job list) in which the operator is a connection candidate from the connection job list 59a, and selects a maintenance terminal. To the maintenance operation terminal. The operator selects a connection job desired to be executed from the candidate job list and notifies the center terminal 5 via the maintenance terminal. The execution determining unit 47 reads the job information of the connection job notified from the operator from the connection job list 59a, and based on this job information (for example, whether there is another operator who has already executed the connection job). To determine whether to permit execution of the connection job. The permission information transmission unit 52 transmits the determination result of the execution determination unit 47 (whether or not to permit execution of the connection job) to the maintenance operation terminal via the maintenance terminal and notifies the operator.

  Next, the configuration of the maintenance terminal will be described with reference to FIG. FIG. 8 is a functional block diagram showing the configuration of the first maintenance terminal 9A. Since the configuration of the first maintenance terminal 9A and the second maintenance terminal 9B is the same, the configuration of the first maintenance terminal 9A will be described as a representative. As shown in FIG. 8, the first maintenance terminal 9A includes an interface 65, a control unit 61, and a database storage unit 63.

  The interface 65 can communicate with a device connected to the LAN 25 using a private IP address. The interface 65 can perform communication via the WAN 3 using a global IP address.

  The database storage unit 63 includes a center terminal information storage unit 81 and a log information storage unit 86. The center terminal information storage unit 81 stores the name and ID of the center terminal 5. The first maintenance terminal 9A can access the center terminal 5 by notifying the connection job selected from the candidate job list by referring to the stored contents of the center terminal information storage unit 81, for example. In the log information storage unit 86, log information indicating processing performed during execution of the connection job is temporarily stored in association with a log information identifier indicating identification information of the log information. Note that, unlike the log information storage unit 56 of the center terminal 5, the log information storage unit 86 of the maintenance terminal stores only the log information of the connection job being executed on the connection side.

  The control unit 61 includes a CPU, a RAM, a ROM, and the like, and can execute various processes by a program read from the ROM or the like. As shown in FIG. 8, the control unit 61 includes a routing session establishment unit 71, a routing control unit 73, a login information transmission unit 75, a selected job notification unit 77, a log information transmission unit 78, and a log information deletion unit. 79.

  The log information transmission unit 78 transmits the log information stored in the log information storage unit 86 to the center terminal 5 and the maintenance target terminal, and stores the log information stored in the log information storage unit of the center terminal 5 and the maintenance target terminal. Update. The log information deletion unit 79 deletes the log information of the connection job stored in the log information storage unit 86 after the connection job is completed. As described above, in this embodiment, each time a connection job is completed, the log information is deleted from the log information storage unit 86, so that other operators communicating via the first maintenance terminal 9A can include the log information. The possibility of information leaking through access can be reduced.

  The routing session establishment unit 71 establishes a routing session between the first maintenance terminal 9A and the first maintenance target terminal 7A or the second maintenance target terminal 7B. The routing session is a media session used for routing communication packets transferred between a device connected to the LAN 25 and a device connected to a LAN (LAN 17 or LAN 21) where the maintenance target system is installed. . The routing control unit 73 uses this routing session to perform routing control of communication packets with devices connected to other LANs.

  The login information transmission unit 75 transmits the operator ID and password (hereinafter referred to as login information) received from the first maintenance operation terminal 23A or the second maintenance operation terminal 23B to the center terminal 5. The selected job notification unit 77 transmits the connection job selected from the candidate job list by the operator to the center terminal 5.

  Next, the configuration of the maintenance target terminal will be described with reference to FIG. FIG. 9 is a functional block diagram showing the configuration of the first maintenance target terminal 7A. Since the configuration of the first serviced terminal 7A and the second serviced terminal 7B is the same, the configuration of the first serviced terminal 7A will be described as a representative. As shown in FIG. 9, the first maintenance target terminal 7 </ b> A includes an interface 95, a control unit 91, and a database storage unit 93.

  The interface 95 can communicate with a device connected to the LAN 17 using a private IP address. Further, the interface 95 can perform communication via the WAN 3 by using a global IP address.

  The control unit 91 includes a CPU, a RAM, a ROM, and the like, and can execute various processes by a program read from the ROM or the like. As shown in FIG. 9, the control unit 91 includes a routing session establishment unit 101 and a routing control unit 103.

  The routing session establishing unit 101 establishes a routing session between the first maintenance target terminal 7A and the first maintenance terminal 9A or the second maintenance terminal 9B. The routing control unit 103 performs routing control of communication packets with devices connected to other LANs using this routing session.

  The database storage unit 93 includes a center terminal information storage unit 105 and a log information storage unit 106. The center terminal information storage unit 105 stores the name and ID of the center terminal 5. The first maintenance target terminal 7A can access the center terminal 5 by referring to the stored contents of the center terminal information storage unit 105, for example, to notify that maintenance work is necessary. In the log information storage unit 106, log information indicating processing performed during execution of the connection job is stored in association with a log information identifier indicating identification information of the log information. The log information storage unit 106 of the maintenance target terminal stores log information of the connection job executed (or executed) as the connected side.

  Next, the flow of processing when performing remote maintenance using the relay communication system 1 of the present embodiment will be described with reference to the sequence diagrams of FIGS. In the following, the second operator Op2 has logged in to the relay communication system 1 using the center terminal 5 as a login relay server, and the third operator Op3 has logged in to the relay communication system 1 using the second maintenance terminal 9B as a login relay server. Consider the situation (the operator list 53a is in the state shown in FIG. 3A). Also, consider a situation where only the first connection job exists as a connection job (the connection job list 59a is in the state shown in FIG. 6A).

  First, processing performed in the relay communication system 1 when a connection job is created will be described. As described above, the connection job is created every time maintenance work is required on the maintenance target system. In the following, a case where maintenance work is required for the first maintenance target system 15A will be considered. For example, when a failure occurs in the first maintenance target system 15A, the fact is notified to the first maintenance target terminal 7A. When the first maintenance target terminal 7A receives information that a failure has occurred (sequence number 1 in FIG. 10), it notifies the center terminal 5 to that effect and requests the creation of a connection job (sequence number 2).

  The center terminal 5 transfers this notification and request to the center terminal operation terminal 11 and notifies the second operator Op2 (sequence number 3). The second operator Op2 selects an operator that preferably performs maintenance based on the content of the failure, the name of the maintenance target terminal, and the like. Here, it is assumed that the first operator Op1 is selected. As a result, the center terminal 5 (connection job creation unit 45) creates a connection job (second connection job) (sequence number 4). The center terminal 5 (connection job list management unit 49) registers the created second connection job in the connection job list 59a (sequence number 5). That is, in the connection job list 59a, “maintenance terminal ID” describes the ID of the first maintenance target terminal 7A, and “connection candidate ID” describes the ID of the first operator Op1 (FIG. 6 ( see b)). Thereafter, the center terminal 5 notifies the first maintenance target terminal 7A that the creation of the connection job has been completed (sequence number 6).

  Upon receiving this notification, the first maintenance target terminal 7A creates a log information identifier of the log information of the second connection job (sequence number 7), and registers the created log information identifier in the log information storage unit 106 (sequence number). 7). Since no maintenance work is performed at this time, log information corresponding to this log information identifier has not been described yet. Thereafter, the first maintenance target terminal 7A transmits the created log information identifier to the center terminal 5 (sequence number 8).

  The center terminal 5 that has received this log information identifier registers this log information identifier in the log information storage unit 56 (sequence number 9). As a result, the log information identifier set in the log information of the second connection job is the same in the center terminal 5 and the first maintenance target terminal 7A.

  The connection job is created as described above. If it is necessary to cause the first operator Op1 to perform maintenance work as soon as possible, the first operator Op1 may be notified immediately after creating the connection job. The notification that the connection job has been created can be performed in various ways. For example, when the instant message service is operated on the relay communication system 1 and the first operator Op1 has logged in to the relay communication system 1, The second operator Op2 can make the notification using the instant message service. If the first operator Op1 is not logged in to the relay communication system 1, it may be notified by appropriate means such as a telephone.

  Next, when the first operator Op1 operates the first maintenance operation terminal 23A to make a login request to the relay communication system 1 using the first maintenance terminal 9A as a login relay server, processing performed in the relay communication system 1 Will be explained. In this login request, the first operator Op1 is requested to input login information (ID and password). Then, the first operator Op1 operates the first maintenance operation terminal 23A to input the ID (Op1) and the password (abc), and confirms the input contents, whereby the login information is transmitted to the first maintenance terminal 9A. The Thereby, the first maintenance terminal 9A receives the login request (sequence number 11 in FIG. 11), and transmits the received login information to the center terminal 5 (sequence number 12).

  The center terminal 5 (login authentication unit 43) that has received this login information determines whether or not login is possible. Specifically, the login authentication unit 43 determines whether or not the input ID and password are registered in the operator list 53a (sequence number 13), and the first maintenance terminal 9A that transmitted the login information serves as the maintenance terminal. It is determined whether or not it is registered in the list 55a (sequence number 14).

  As shown in FIG. 3, the ID and password input above are registered in the operator list 53a. Further, as shown in FIG. 4, the first maintenance terminal 9A is registered in the maintenance terminal list 55a. Therefore, the login authentication unit 43 permits the login of the first operator Op1. Then, the center terminal 5 updates the contents of the operator list 53a (sequence number 15). Specifically, the ID of the first operator Op1 and the ID of the first maintenance terminal 9A are described in the “login relay server” corresponding to the first operator Op1 in the operator list 53a (from FIG. 3A). The operator list 53a is updated as shown in FIG. 3B). Then, the center terminal 5 notifies the first maintenance terminal 9A of successful login (sequence number 16). When the center terminal 5 fails to authenticate the terminal ID or the login information, the center terminal 5 notifies the maintenance terminal of the login failure.

  The first maintenance terminal 9A transfers the login success notification received from the center terminal 5 to the first maintenance operation terminal 23A and notifies the first operator Op1 of the login success (sequence number 17). Then, the first maintenance terminal 9A requests the center terminal 5 for the candidate job list (a list of connection jobs in which the logged-in first operator Op1 is a connection candidate) (sequence number 18).

  Upon receiving this notification, the center terminal 5 (candidate job list transmission unit 51) extracts a connection job in which the first operator Op1 is a connection candidate from the connection jobs stored in the connection job list 59a, and obtains a candidate job. A list is created (sequence number 19). As shown in FIG. 6B, since both the first connection job and the second connection job described in the connection job list 59a have the first operator Op1 as a connection candidate, One connection job and second connection job are described. Then, candidate job list transmission unit 51 transmits the created candidate job list to first maintenance terminal 9A (sequence number 20). When there is no connection job for which the first operator Op1 is a connection candidate, the center terminal 5 transmits a message to that effect to the first maintenance terminal 9A.

  The first maintenance terminal 9A transfers the candidate job list received from the center terminal 5 to the first maintenance operation terminal 23A and notifies the first operator Op1 (sequence number 21). Specifically, the first maintenance operation terminal 23A displays the candidate job list on its own display. Accordingly, the first operator Op1 can know a list of connection jobs that can be executed by the first operator Op1.

  The first operator Op1 can also log in to the relay communication system 1 from the first maintenance terminal 9A by operating the second maintenance operation terminal 23B. Furthermore, it is possible to log in to the relay communication system 1 from the second maintenance terminal 9B by operating the third maintenance operation terminal 27A or the fourth maintenance operation terminal 27B.

  Next, processing performed in the relay communication system 1 from selection of a connection job by the operator to maintenance work will be described. In the following, it is assumed that the first operator Op1 selects the second connection job from the candidate job list.

  When the first operator Op1 selects the second connection job and confirms the selection, information indicating the selected connection job is transmitted to the first maintenance terminal 9A. Thereby, the first maintenance terminal 9A accepts the selection of the connection job (sequence number 31 in FIG. 12), and notifies the center terminal 5 of the selection contents of the first operator Op1 together with the ID of the first operator Op1 (sequence number). 32).

  Based on this notification, the center terminal 5 (execution determination unit 47) reads job information of the second connection job that is the corresponding connection job from the connection job list 59a (sequence number 33). Then, the execution determination unit 47 determines whether the second connection job is being executed or is being prepared for execution based on the read job information (sequence number 34). As shown in FIG. 6B, since the job information of the second connection job is blank, the connection job is neither being executed nor being prepared for execution. Accordingly, the execution determination unit 47 permits the first connection Op 1 to execute the second connection job. Thereafter, the connection job list management unit 49 describes “preparing for execution” in the job information of the second connection job in the connection job list 59a (sequence number 35). Thereby, the second operator Op2 of the call center can know that the connection work for the second connection job has started. At this time, the execution of the second connection job by another operator can be excluded. The center terminal 5 (the permission information transmission unit 52 and the log information identifier transmission / reception unit 41) transmits the log information identifier corresponding to the second connection job registered with the sequence number 9, and executes the second connection job. The first maintenance terminal 9A is notified of permission (sequence number 36). If the center terminal 5 does not permit execution of the connection job, the center terminal 5 notifies the maintenance terminal to that effect.

  The first maintenance terminal 9A (log information management unit 42) registers the received log information identifier in the log information storage unit 86 (sequence number 37). Thereby, the log information identifiers of the log information of the second connection job created with the sequence number 4 are the same among the center terminal 5, the first maintenance target terminal 7A, and the first maintenance terminal 9A. In addition, the first maintenance terminal 9A transfers a notification that the execution of the connection job is permitted to the first maintenance operation terminal 23A and notifies the first operator Op1 (sequence number 38). Then, the first maintenance terminal 9A (routing session establishment unit 71) issues a routing session establishment request to the first maintenance target terminal 7A, which is the maintenance destination of the corresponding connection job (sequence number 39). In response to this request, first maintained terminal 7A (routing session establishing unit 101) returns an OK response as access permission (sequence number 40). As a result, a media session is established between the first maintenance terminal 9A and the first maintenance target terminal 7A. After the media session is established, the first maintenance terminal 9A and the first maintenance target terminal 7A exchange the network addresses of the LAN 17 and the LAN 25 that are routing targets. This enables communication between the first maintenance operation terminal 23A and the first maintenance target system 15A or the second maintenance target system 15B via the routing session. Then, the first maintenance terminal 9A transmits to the first maintenance operation terminal 23A that the routing session has been established and notifies the first operator Op1 (sequence number 41). Furthermore, the first maintenance terminal 9A notifies the center terminal 5 that a routing session has been established (sequence number 42).

  Upon receiving this notification, the center terminal 5 (connection job list management unit 49) writes “Op1 in progress” in the job information of the second connection job in the connection job list 59a, as shown in FIG. 6C. (Sequence number 43). Thereby, the second operator Op2 of the call center can know that the maintenance work related to the second connection job has been started by the first operator Op1.

  The first maintenance terminal 9A starts the maintenance work for the system (first maintenance target system 15A) requiring maintenance via the routing session established with the first maintenance terminal 7A (sequence number). 44). Specifically, the first operator Op1 operates the first maintenance operation terminal 23A to perform maintenance work such as grasping the status of the first maintenance target system 15A, changing parameter settings, and updating software. be able to.

  As the above maintenance work is performed by the first operator Op1, log information is accumulated in the log information storage unit 86 of the first maintenance terminal 9A based on the contents of the work. Then, the first maintenance terminal 9A (log information transmission unit 78) designates the log information identifier, and transmits this log information to the first maintenance target terminal 7A and the center terminal 5 as needed (sequence numbers 45 and 46). . The first maintenance target terminal 7A and the center terminal 5 specify which connection job log information is based on the log information identifier, and update the corresponding log information in the log information storage unit 56 and the log information storage unit 106.

  Next, processing performed in the relay communication system 1 when the maintenance work by the first operator Op1 is completed will be described.

  After the maintenance work is completed, the first operator notifies the completion of the maintenance work to the first maintenance target terminal 7A via the first maintenance terminal 9A (sequence number 51 in FIG. 13). Further, the first operator Op1 notifies the completion of the maintenance work also to the center terminal 5 via the first maintenance terminal 9A (sequence number 52).

  Upon receiving this notification, the center terminal 5 (connection job list management unit 49) registers the completion of the maintenance work in the job information of the second connection job (sequence number 53), and sends the second connection job from the connection job list 59a. Delete (sequence number 54).

  Thereafter, the first maintenance terminal 9A deletes the log information temporarily stored in the log information storage unit 86 (sequence number 55). Then, the first maintenance terminal 9A requests the candidate job list from the center terminal 5 again, and a new maintenance operation by the first operator Op1 is performed through the same processing.

  Next, a case where the center terminal 5 and the maintenance terminal cannot communicate with each other during the maintenance work will be described with reference to the sequence diagram of FIG. In the following, the execution of the second connection job is permitted in the same manner as described above, and the routing session can be established between the first maintenance target terminal 7A and the first maintenance terminal 9A, but the maintenance work is executed by the first operator Op1. A case where the center terminal 5 has stopped will be described.

  As described above, after the maintenance work by the first operator Op1 is started (sequence number 61), the first maintenance target terminal is based on the log information accumulated in the log information storage unit 86 of the first maintenance terminal 9A. The log information stored in 7A and the center terminal 5 is updated (sequence numbers 62 and 63). Thereafter, as shown in FIG. 14, for example, it is assumed that a failure occurs in the interface 35 provided in the center terminal 5, and the center terminal 5 and the first maintenance terminal 9A cannot communicate with each other. In this case, the center terminal 5 cannot receive the log information from the first maintenance terminal 9A, and therefore fails to update the log information.

  Thereafter, the maintenance work by the first maintenance terminal 9A is completed, and as described above, the completion of the maintenance work is notified to the first maintenance target terminal 7A (sequence number 64). However, since the communication function of the center terminal 5 has not yet been restored, the first maintenance terminal 9A cannot notify the center terminal 5 of the completion of the maintenance work. Next, the first maintenance terminal 9A deletes the log information (sequence number 65) as described above.

  Thereafter, when the communication function of the center terminal 5 is restored, the center terminal 5 determines whether there is a connection job that has failed in the update of the log information. This determination is made, for example, by checking whether there is a connected job that has been registered for execution and has not yet been notified of completion of maintenance work but has not received log information for a long time. Is done. Alternatively, the first maintenance terminal 9A adds serial numbers to the log information transmitted to the center terminal 5 as needed, and the center terminal 5 side checks whether there is any omission in the serial numbers of the received log information. It is also possible to detect a failure in updating the log information.

  It is determined that there is a high possibility that a connection job that satisfies the above conditions cannot record complete log information on the center terminal 5 side. In this way, the center terminal 5 detects that the log information of the second connection job has failed to be updated (sequence number 71).

  Then, the center terminal 5 reads the log information identifier of the log information of the second connection job from the log information storage unit 56 (sequence number 72). The center terminal 5 designates the read log information identifier and requests log information corresponding to the log information identifier from the first maintenance target terminal 7A (sequence number 73).

  The first maintenance target terminal 7A that has received this request reads the log information corresponding to the designated log information identifier from the log information storage unit 106 (sequence number 74). Then, the read log information is transmitted to the center terminal 5 (sequence number 75).

  The center terminal 5 (log information management unit 42) updates the log information of the second connection job of the log information management unit 42 based on the received log information (sequence number 76).

  As described above, the center terminal 5 acquires the log information updated during its stop, and stores the log information of the second connection job in the log information management unit 42 in a complete form (a form without omission). Can do.

  As described above, the center terminal 5 of the present embodiment includes the operator list storage unit 53, the connection job creation unit 45, the candidate job list transmission unit 51, the log information storage unit 56, and the log information identifier transmission / reception unit. 41 and a log information management unit 42. The operator list storage unit 53 stores a list of operators that can log in to the relay communication system 1. The connection job creation unit 45 creates a connection job in which a maintenance target terminal is associated with an operator as a connection candidate that is a candidate that can be permitted to connect to the maintenance target terminal. The candidate job list transmission unit 51 is a candidate that is a list of connection jobs in which the first operator Op1 logged in via the first maintenance terminal 9A is set as a connection candidate in response to a request from the first maintenance terminal 9A. The job list is transmitted to the first maintenance terminal 9A. The log information storage unit 56 stores log information indicating the content of work performed during execution of the connection job in association with a log information identifier for identifying the log information. The log information identifier transmission / reception unit 41 transmits / receives a log information identifier, and the same log information of the same connection job is transmitted between the center terminal 5, the first maintenance terminal 9A, and the first maintenance target terminal 7A. The log information identifier is set. During execution of the connection job, the log information management unit 42 receives the log information together with the log information identifier from the first maintenance terminal 9A, and updates the log information stored in the log information storage unit 56. When a connection job that fails in the update of log information is detected, the log information management unit 42 acquires the same log information from the first maintenance target terminal 7A based on the log information identifier of the log information of the connection job. Then, the log information stored in the log information storage unit 56 is updated.

  Thereby, even if the center terminal 5 becomes unable to communicate with the first maintenance terminal 9A during the execution of the connection job and fails to update the log information in the middle, for example, after normal communication is recovered, the corresponding log information is displayed. It can be acquired from the first maintenance target terminal 7A. Therefore, it is possible to prevent the log information stored in the center terminal 5 from being lost.

  In the center terminal 5 of the present embodiment, the log information identifier transmission / reception unit 41 receives the log information identifier set in the first maintenance target terminal 7A, and transmits the received log information identifier to the first maintenance terminal 9A. Thus, the same log information identifier is set in the log information of the second connection job.

  Thereby, the log information identifier used in the first maintenance target terminal 7A can also be used in the center terminal 5 and the first maintenance terminal 9A.

  Further, the first maintenance terminal 9A of the present embodiment includes a center terminal information storage unit 105, a selected job notification unit 77, a routing session establishment unit 71, a routing control unit 73, a log information storage unit 86, and log information. A transmission unit 78 and a log information deletion unit 79 are provided. The center terminal information storage unit 105 is a storage destination of a connection job that associates an operator who can log in to the relay communication system and a maintenance target terminal set as a connection candidate that can be permitted to be connected by the operator. The identification information of a certain center terminal 5 is stored. The selected job notification unit 77 receives from the center terminal 5 a candidate job list that is a list of connection jobs in which the first operator Op1 who is logged in via the user is set as a connection candidate. The center terminal 5 is notified of the selected second connection job. When the routing session establishment unit 71 receives the notification that the execution of the second connection job is permitted, the routing session establishment unit 71 establishes a routing session used for packet routing with the first serviced terminal 7A indicated by the second connection job. Establish. The routing control unit 73 performs routing control based on the routing session. The log information storage unit 86 corresponds log information indicating the contents of work performed during execution of the connection job to the same log information identifier as the log information identifier set in the center terminal 5 and the first serviced terminal 7A. And temporarily store. The log information transmission unit 78 transmits the log information stored in the log information storage unit 86 together with the log information identifier in order to update the log information stored in the first maintenance target terminal 7A and the center terminal 5. The log information deletion unit 79 deletes the log information in the log information storage unit 86 when the work performed during the execution of the connection job is completed.

  This reduces the risk of leaking highly confidential log information to other operators because the log information of the connection job is deleted from the relay server every time work done during the execution of the connection job is completed. Can be made.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the above embodiment, since the maintenance terminal deletes the log information after the maintenance work is completed, the center terminal 5 is configured to request the log information from the maintenance target terminal after returning from the stop. However, if the maintenance terminal is configured not to delete the log information after the maintenance work is completed, the center terminal 5 can request the log information from the maintenance terminal.

  The relay server that creates the log information identifier may not be a maintenance target terminal. For example, the log information identifier may be created on the center terminal 5 side when creating the log information, and the log information identifier may be transmitted from the center terminal 5 to the maintenance target terminal and the maintenance terminal.

  The connection job can also be created from the maintenance operator side. For example, when a regular maintenance is scheduled, an operator in charge of the regular maintenance makes a connection job creation request to the center terminal at the maintenance timing, thereby creating a connection job.

  The number of maintenance target terminals and maintenance terminals constituting the relay communication system 1 is not limited to the above embodiment, and may be one each, or may be three or more. In addition, the number of maintenance target systems connected to the maintenance target terminal and the number of maintenance operation terminals connected to the maintenance terminal are not limited to the above embodiment, and may be one each, or three or more. There may be.

  The first maintenance terminal 9A and the second maintenance terminal 9B may be a memory detachably attached to a personal computer and an application stored in the memory.

  The operator list 53a, maintenance terminal list 55a, maintenance target terminal list 57a, and connection job list 59a can be stored in an appropriate format (for example, XML format).

  Instead of the configuration of the above-described embodiment, an external server used for communication between each relay server may be installed on the Internet, and a communication may be performed by exhibiting a function as a SIP (Session Initiation Protocol) server. .

1 Relay communication system 5 Center terminal (relay server with management function)
7A First maintenance target terminal (relay server on the connected side)
7B Second maintenance target terminal (relay server on the connected side)
9A 1st maintenance terminal (relay server on the connection side)
9B Second maintenance terminal (relay server on the connection side)
11 Center terminal operation terminal 15A 1st maintenance target system 15B 2nd maintenance target system 23A 1st maintenance operation terminal 23B 2nd maintenance operation terminal 41 Log information identifier transmission / reception part 42 Log information management part 56 Log information storage part 78 Log information Transmission unit 79 Log information deletion unit 86 Log information storage unit

Claims (4)

An operator list storage unit for storing a list of operators that can log in to a relay communication system including the relay server itself and other relay servers;
A connection job creation unit that creates a connection job that associates a connected relay server with an operator that is a candidate for connection that can be permitted to connect to the connected relay server;
In response to a request from the connection-side relay server, a candidate job list that is a list of the connection jobs set as connection candidates by an operator who is logged in via the connection-side relay server is displayed as the connection-side relay server. A candidate job list transmission unit to be transmitted to
A log information storage unit for storing log information indicating the contents of work performed during execution of the connection job in association with a log information identifier for identifying the log information;
The log information identifier is transmitted and received, and the same log information identifier is set in the log information of the same connection job between itself, the connection-side relay server, and the connected-side relay server. Log information identifier transmission / reception unit to be
A log information management unit that receives the log information together with the log information identifier from the connection-side relay server and updates the log information stored in the log information storage unit during execution of the connection job;
With
When the connection job that has failed in the update of the log information is detected, the log information management unit, based on the log information identifier of the log information of the connection job, A relay server with a management function, wherein the same log information is acquired from a relay server on a connection side, and the log information stored in the log information storage unit is updated. A relay server with a management function according to claim 1,
The log information identifier transmission / reception unit receives the log information identifier set in the connected relay server, and transmits the received log information identifier to the connecting relay server, so that the same connection A relay server with a management function, wherein the same log information identifier is set in the log information of a job. Associating an operator who can log in to a relay communication system including itself and other relay servers, and a connected relay server set as a connection candidate that can be permitted to connect to the operator A management destination information storage unit that stores identification information of the relay server with management function that is the storage destination of the connected job;
The connection job selected from the candidate job list after receiving from the relay server with management function a candidate job list that is a list of the connection jobs that are set as connection candidates by an operator who is logged in A selected job notifying unit for notifying the relay server with the management function,
A routing session establishment unit that establishes a routing session used for packet routing with a relay server on the connected side indicated by the connection job when receiving the notification that the execution of the selected connection job is permitted; ,
A routing control unit that performs routing control based on the routing session;
Log information indicating the contents of work performed during execution of the connection job is associated with the same log information identifier as the log information identifier set in the relay server with management function and the relay server on the connected side. A log information storage unit for temporary storage;
Log information transmission for transmitting the log information stored in the log information storage unit together with the log information identifier in order to update the log information stored in the connected relay server and the relay server with management function And
A log information deletion unit for deleting log information in the log information storage unit upon completion of work performed during execution of the connection job;
A relay server on the connection side, comprising: A relay server with management functions;
A relay server on the connection side capable of communicating with the relay server with management function;
A connected relay server capable of communicating with the management function relay server;
A relay communication system comprising:
The relay server with management function is:
An operator list storage for storing a list of operators that can log in;
A connection job creating unit that creates a connection job that associates the connected relay server with an operator that is a candidate for connection that can be permitted to connect to the connected relay server;
In response to a request from the connection-side relay server, a candidate job list, which is a list of the connection jobs set as connection candidates by an operator who is logged in via the connection-side relay server, is relayed to the connection-side relay server. A candidate job list transmission unit to be transmitted to the server;
A log information storage unit for storing log information indicating the contents of work performed during execution of the connection job in association with a log information identifier for identifying the log information;
The log information identifier is transmitted and received, and the same log information identifier is set in the log information of the same connection job between itself, the connection-side relay server, and the connected-side relay server. Log information identifier transmission / reception unit to be
A log information management unit that receives the log information together with the log information identifier from the connection-side relay server and updates the log information stored in the log information storage unit during execution of the connection job;
With
When the connection job that has failed in the update of the log information is detected, the log information management unit, based on the log information identifier of the log information of the connection job, A relay communication system, wherein the same log information is acquired from a relay server on a connection side, and the log information stored in the log information storage unit is updated.

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