JP6264908B2 - Communication system and information processing server - Google Patents

Description

  The present invention relates to a communication system including a server capable of network communication with a plurality of devices.

  In a server capable of network communication with a plurality of devices, for example, information to be managed in a database is transmitted from the plurality of devices. At this time, if the amount of information transmitted from the device is too large, the server may go down. In view of such a situation, as described in the following patent document, a technique for coping with server down has been developed.

JP 2006-50465 A

  According to the technique described in the above-mentioned patent document, it is possible to cope with the server down, but when the communication path between the server and various devices goes down and the communication path is restored, There is a possibility that the information transmitted from the device will be concentrated on the server and the server processing will be slow. The present invention has been made in view of such circumstances, and prevents concentration of load on the server when the communication path between the server and various devices goes down and the communication path is restored. Provide technology for.

  In order to solve the above problems, a communication system described as an embodiment of the present specification includes a plurality of devices, a relay server capable of network communication with the plurality of devices, a communication unit capable of network communication with a database, and a processor. An information processing server comprising: a database, the relay server, and a client request processing server capable of network communication with the client device, wherein each of the plurality of devices has a first timing, The first information can be transmitted to the relay server, and the relay server cannot receive the first information in response to receiving the first information and at a predetermined timing. Accordingly, the second information is information based on the first information and is specific information for each of the plurality of devices. , Can be transmitted for storage in a memory provided in a device different from both the device provided with the database, the client device, and the client request processing server, and the processor transmits from the relay server. Second information reading means for reading the second information stored in the memory from the memory at a second timing different from the first timing, and the second information reading means reads the second information. In response, a third information that is based on the read second information and is to be stored in the database is transmitted to the device provided with the database via the communication unit. It is possible to function as information transmission means, and the processor of the client request processing server is configured to transmit the third information transmission. In response to request information received from the client device, the third information reading means for reading the third information transmitted to the device provided with the database by the stage, and the third information reading means It is possible to function as execution means for executing processing corresponding to the request information received from the client device in response to reading out the third information.

  In the communication system and the information processing server described as the embodiment of the present specification, the first information is transmitted from each of the plurality of devices to the relay server at the first timing. In response to non-reception of information, second information that is specific information for each of a plurality of devices is transmitted from the relay server to the memory. The second information is stored in the memory, and the information processing server reads the second information from the memory at a second timing different from the first timing. Further, the information processing server transmits the third information that is information based on the second information and should be stored in the database to the database in response to reading the second information. Further, the client request processing server reads the third information from the database in accordance with the request information received from the client device, and executes a process corresponding to the request information. In the communication system and the information processing server thus configured, for example, when the communication path between the relay server and the plurality of devices goes down and the communication path is restored, the plurality of device information is stored in the memory. Although the information processing server reads the second information from the memory at a timing different from the timing at which the first information is sent from a plurality of devices to the relay server, the load on the information processing server can be suppressed. It becomes. Also, since the third information based on the second information can be transmitted from the information processing server to the database at an arbitrary timing, the third information is transmitted to the database at a timing that does not impose a burden on the information processing server. Is possible. For this reason, according to the communication system and the information processing server described as the embodiment of the present specification, it is possible to appropriately prevent the load from being concentrated on the information processing server. Further, the client request processing server is provided separately from the information processing server, the relay server, and the memory. For this reason, when the client request server executes a process in response to a request from the client device, it is possible to reduce the possibility of a failure due to an excessive load on the client request processing server.

  Further, in the communication system described as the embodiment of the present specification, the client request processing server can transmit the third information to the client device in response to reading the third information from the database. As a result, the third information can be utilized in the client device.

  Further, in the communication system described as the embodiment of the present specification, the relay server relays with a device in response to reception of periodic information transmitted in the first period of the first information or non-reception of period information. The second information related to the communication state with the server can be transmitted to the memory. In addition, the information processing server reads the second information from the memory at a second period different from the first period, and transmits the third information related to the communication state between the device that is the source of the period information and the relay server to the database. Is possible. Further, the client request processing server reads, from the database, the third information related to the communication state between the one device and the relay server in response to receiving the inquiry about the communication state between the one device and the relay server, The third information can be transmitted to the client device. As a result, the client apparatus can recognize the communication state between the one device and the relay server.

  Further, in the communication system described as the embodiment of the present specification, the connection according to the connection establishment type protocol is relayed between the connection establishment request information transmission source device and the device by transmitting the connection establishment request information to the relay server. The device can be established with the server, and the device can transmit the maintenance information for maintaining the connection according to the connection establishment type protocol among the first information in the first period. In response to the reception of the maintenance information, the relay server transmits second information indicating that the connection between the maintenance information transmission source device and the relay server is maintained to the memory, and the maintenance information In response to the reception, the second information indicating that the connection between the device for which the maintenance information could not be acquired and the relay server is not maintained can be transmitted to the memory. Further, the information processing server can read the second information from the memory in the second period, and transmit the third information related to maintaining the connection established between the device and the relay server to the database. Thereby, it can be determined whether or not the connection between the device and the relay server is appropriately maintained.

  In the communication system described as the embodiment of the present specification, the relay server transmits maintenance confirmation information indicating that the connection between the maintenance information transmission source device and the relay server is maintained to the database. It is possible. In addition, after transmitting the maintenance information, the device can transmit the connection establishment request information and the maintenance information to the relay server in response to the non-reception of the maintenance confirmation information. The relay server transmits the second information indicating that the connection between the device for which maintenance information cannot be acquired and the relay server is not maintained, and then requests connection establishment from the device for which maintenance information has not been acquired. In response to receiving the information and the maintenance information, the second information indicating that the connection between the maintenance information transmission source device and the relay server is maintained can be transmitted to the memory. This makes it possible to appropriately store the reconnection between the device and the relay server in the database.

  In the communication system described as the embodiment of the present specification, the client request processing server transmits the third information related to the communication state between the one device and the relay server to the client device, and then transmits the third information to the one device. In response to receiving the command from the client device, it is possible to send a command to one device to the relay server, and the relay server is connected to the one device while maintaining a connection. The command can be transmitted to one device in response to receiving the command to the other device. Thereby, it is possible to reliably transmit a command from the client apparatus to one device.

  Further, in the communication system described as the embodiment of the present specification, in response to receiving a command from the client device from the relay server, the device transmits response information to the command to the relay server as first information. It is possible. Further, the relay server can store the response information in the memory as the second information in response to receiving the response information from the one device after transmitting the command to the device. 3 information can be sent to the database. Furthermore, the client request processing server can transmit the response information to the client device in response to reading of the response information after receiving a command for one device from the client device. As a result, the client device can confirm transmission of the command.

  In the communication system described as the embodiment of the present specification, the memory is provided in a device different from the information processing server and the relay server, and the information processing server can read the second information from the device including the memory. Is possible. As a result, the memory for storing the second information and the information processing server for transmitting the third information to the database can be provided as separate devices, and the burden on the information processing server can be reduced.

  In addition, the communication system described as an embodiment of the present specification includes a plurality of relay servers and a plurality of devices, and network communication between the plurality of relay servers and the plurality of devices is performed by a load balancer. It is possible to disperse to either. As a result, the burden on the relay server can be reduced.

  In the communication system described as an embodiment of the present specification, the connection establishment type protocol may be XMPP over BOSH, the connection establishment request information may be XMPP session establishment request information, and the maintenance information may be XMPP connection establishment request information. Is possible. This makes the protocol and various information clear.

  In addition, the information processing server described as an embodiment of the present specification can communicate device information between information indicating that communication is established between the device and the relay server, and communication between the device and the relay server. It is possible to classify information into information indicating that it has not been established, and transmit the classified information as third information to the database. Thereby, it becomes possible to reduce the information amount of the 3rd information transmitted to a database, and it becomes possible to reduce the burden of an information processing server.

  Further, in the information processing server described as the embodiment of the present specification, it is possible to process a predetermined number of pieces of second information into a predetermined number of pieces of third information or less. Thereby, it becomes possible to reduce the information amount of the 3rd information transmitted to a database, and it becomes possible to reduce the burden of an information processing server.

  In addition, when the information processing server described as the embodiment of the present specification reads the second information from the memory every predetermined time, the second information is read from the memory if the processing time of the second information is equal to or longer than the set time. It is possible to read the second information from the memory before the next cycle in the second cycle after the read. As a result, even when the processing time of the second information becomes longer, the acquisition timing of the second information can be kept constant to some extent.

  In addition, the information processing server described as the embodiment of the present specification, when the information related to the same device exists in the read second information of the predetermined number, the latest information of the information related to the same device It is possible to send information to the database and not send information other than the latest information of the information about the same device to the database. As a result, the amount of information transmitted to the database can be reduced, and the burden on the information processing server can be reduced.

1 is a block diagram of a communication system 1. FIG. 1 is a block diagram of a conventional communication system 100. FIG. 1 is a block diagram of a communication system 100. FIG. 3 is a sequence diagram showing an operation of the communication system 1. FIG. 3 is a sequence diagram showing an operation of the communication system 1. FIG. It is a figure which shows several device information notionally. FIG. 3 is a diagram illustrating an operation flowchart of the information processing server 10. FIG. 3 is a diagram illustrating an operation flowchart of the information processing server 10. It is a figure which shows the operation | movement flowchart of the web server. It is a figure which shows the operation | movement flowchart of the web server.

<Embodiment>
FIG. 1 shows a block diagram of a communication system 1 exemplified as an embodiment according to the present application. The communication system 1 includes an information processing server 10, a web server 30, relay servers 50 and 70, a load balancer 80, an MFP (abbreviation of multifunction peripheral) 82, 84, 86, a PC (abbreviation of personal computer) 88, a service server 90, A queue 92, a database 96, and the Internet 98 are provided.

  The MFPs 82, 84, and 86 are multifunction peripheral devices having a printer function, a scanner function, a copy function, a facsimile function, and the like, and are connected to the Internet 98 via a router 87. The PC 88 transmits various commands to the service server 90 via the router 89 and the Internet 98. The service server 90 transmits various commands and the like to the web server 30 via the Internet 98. The queue 92 stores various types of information transmitted from the relay servers 50 and 70 via the Internet 98. A device provided with a memory. In this specification, the term “queue” may be used to refer to the memory included in the queue. The database 96 is a device having a memory for storing various information acquired from the queue 92 via the Internet 98. In this specification, the term “database” may be used to refer to the memory provided in the database. Note that the memory included in the queue 92 and the database 96 may be any of RAM (abbreviation of random access memory), flash memory, and HDD (abbreviation of hard disk), or a combination of these.

  The information processing server 10 mainly includes a CPU (abbreviation of central processing unit) 12, a storage unit 14, and a network I / F 16. These components can communicate with each other via the input / output port 18.

  The CPU 12 executes processing according to the program 20 in the storage unit 14. Hereinafter, the CPU 12 that executes a program such as the communication program 20a or the operating system 20b may be simply described as a program name. For example, the description “communication program 20a” may mean “the CPU 12 executing the communication program 20a”. The storage unit 14 is configured by combining a RAM (abbreviation of random access memory), a ROM (abbreviation of read only memory), a flash memory, an HDD (abbreviation of hard disk), a buffer provided in the CPU 12, and the like.

  The storage unit 14 stores the program 20. The program 20 includes a communication program 20a and an operating system 20b (sometimes abbreviated as OS 20b). The communication program 20 a is a program for communicating with the queue 92 and the database 96. The storage unit 14 may be a computer-readable storage medium. The computer-readable storage medium is a non-transitory medium such as a ROM, a RAM, a flash memory, or a hard disk. An electric signal carrying a program downloaded from a server on the Internet is not included in a non-transitory medium.

  The operating system 20b is a program that provides basic functions used for the communication program 20a. The OS 20b includes a program for controlling the storage unit 14 and the like.

  The storage unit 14 includes a data storage area 14a. The data storage area 14a is an area for storing various data. The communication program 20a outputs data for storing various data and the like in the data storage area 14a via the OS 20b. Alternatively, the communication program 20a acquires various data stored in the data storage area 14a via the OS 20b.

  The network I / F 16 communicates with an external device via the Internet 98, and is connected to the queue 92 and the database 96 via the Internet 98. Thereby, the information processing server 10 can transmit / receive various data to / from the queue 92 and the database 96.

  The web server 30 mainly includes a CPU 32, a storage unit 34, and a network I / F 36. These components can communicate with each other via the input / output port 38.

  The CPU 32 executes processing according to the program 40 in the storage unit 34. Hereinafter, the CPU 32 that executes a program such as the communication program 40a and the operating system 40b may be simply described by a program name. For example, the description “communication program 40a” may mean “the CPU 32 executing the communication program 40a”. The storage unit 34 is configured by combining a RAM, a ROM, a flash memory, an HDD, a buffer included in the CPU 32, and the like.

  The storage unit 34 stores the program 40. The program 40 includes a communication program 40a and an operating system 40b (sometimes abbreviated as OS 40b). The communication program 40 a is a program for communicating with the MFPs 82, 84, 86, the service server 90, and the database 96. The storage unit 34 may be a computer-readable storage medium.

  The operating system 40b is a program that provides basic functions used for the communication program 40a. The OS 40b includes a program for controlling the storage unit 34 and the like.

  The storage unit 34 includes a data storage area 34a. The data storage area 34a is an area for storing various data. The communication program 40a outputs data for storing various data and the like in the data storage area 34a via the OS 40b. Alternatively, the communication program 40a acquires various data stored in the data storage area 34a via the OS 40b.

  The network I / F 36 communicates with an external device via the Internet 98, and is connected to the MFPs 82, 84, 86, the service server 90, and the database 96 via the Internet 98. As a result, the web server 30 can send and receive various data to and from the MFPs 82, 84, 86, the service server 90, and the database 96.

  Moreover, since the relay servers 50 and 70 have the same configuration, the relay server 50 will be described. The relay server 50 mainly includes a CPU 52, a storage unit 54, and a network I / F 56. These components can communicate with each other via the input / output port 58.

  The CPU 52 executes processing according to the program 60 in the storage unit 54. Hereinafter, the CPU 52 that executes a program such as the communication program 60a and the operating system 60b may be simply described by a program name. For example, the description “communication program 60a” may mean “the CPU 52 that executes the communication program 60a”. The storage unit 54 is configured by combining a RAM, a ROM, a flash memory, an HDD, a buffer included in the CPU 32, and the like.

  The storage unit 54 stores the program 60. The program 60 includes a communication program 60a and an operating system 60b (sometimes abbreviated as OS 60b). The communication program 60 a is a program for communicating with the web server 30, the MFPs 82, 84, 86 and the queue 92. The storage unit 54 may be a computer-readable storage medium.

  The operating system 60b is a program that provides basic functions used for the communication program 60a. The OS 60b includes a program for controlling the storage unit 54 and the like.

  The storage unit 54 includes a data storage area 54a. The data storage area 54a is an area for storing various data. The communication program 60a outputs data for storing various data and the like in the data storage area 54a via the OS 60b. Alternatively, the communication program 60a acquires various data stored in the data storage area 54a via the OS 60b.

  The network I / F 56 communicates with an external device via the Internet 98, and is connected to the web server 30, MFPs 82, 84, 86, and the queue 92 via the Internet 98. As a result, the relay server 50 can transmit and receive various data to and from the web server 30, the MFPs 82, 84, 86, and the queue 92. However, the network I / F 56 is connected to the Internet 98 via the load balancer 80. The load balancer 80 distributes communication between the relay servers 50 and 70 and the MFPs 82, 84 and 86 to each of the relay servers 50 and 70. Accordingly, it is possible to distribute the communication load between the MFPs 82, 84, 86 to the two relay servers 50, 70. Note that the relay servers 50 and 70 can communicate with a large number of MFPs via the load balancer 80. For example, communication with thousands of MFPs is possible.

  Here, the definition of the words “data” and “information” will be described. In this specification, “data” and “information” use “information” as a superordinate concept of “data”. Therefore, “A data” may be rephrased as “A information”. Further, “information” is treated as the same information as long as it is recognized as the same meaning content even if the format as “data” (for example, text format, binary format, flag format, etc.) is different. For example, as long as the apparatus handles the information indicating that the number of copies is two, the text format data “COPY = 2” and the binary format data “10” are the same information. However, the distinction between the above “data” and “information” is not strict, and exceptional handling is allowed.

<Management of device information in a conventional communication system>
In the conventional communication system, unlike the communication system 1, the information processing server 10 and the queue 92 are not provided. For this reason, for example, when a communication failure occurs between the relay server 50 and the load balancer 80, a large amount of data is generated between the relay server 50 and the web server 30 and between the web server 30 and the database 96. There is a possibility that data transmission / reception is performed and data transmission / reception in the communication system becomes impossible.

  Specifically, as shown in FIG. 2, in the conventional communication system 100, the MFPs 82, 84, 86 and the relay servers 50, 70 transmit / receive data via the load balancer 80. Further, data transmission / reception is performed between the relay servers 50 and 70 and the web server 30, and data transmission / reception is performed between the web server 30 and the database 96. Furthermore, data transmission / reception is performed between the PC 88 and the web server 30 via the service server 90.

  Note that data transmission / reception between the MFPs 82, 84, 86 and the relay servers 50, 70 is a connection establishment type protocol, specifically, XMPP over BOSH (eXtensible Messaging and Presence Protocol Over Bidirectional-streams Over Synchronous HTTP). (Omitted). Data transmission / reception between the relay servers 50 and 70 and the web server 30 is performed in accordance with HTTP (Hypertext Transfer Protocol).

  In the communication system 100, in the configuration shown in FIG. 2, information relating to the communication state between the MFPs 82, 84, 86 and the relay servers 50, 70 (hereinafter sometimes referred to as “device information”) is stored in the database 96. It is managed in. Specifically, the relay servers 50 and 70 transmit the device information to the web server 30 at a timing when the device information should be rewritten. For example, a state in which data cannot be transmitted / received between the MFP 82 and the relay server 50 from a state in which data can be transmitted / received between the MFP 82 and the relay server 50 (hereinafter sometimes referred to as “online state”). (Hereinafter, sometimes described as “offline state”), the relay server 50 determines that the communication state of the MFP 82 is offline from the relay server 50 to the web server 30. Is done. If the relay server 50 determines that the MFP 82 and the relay server 50 have changed from the offline state to the online state, the relay server 50 transmits information indicating the online state to the web server 30. . When the relay server transmits an instruction to the MFP 82 in accordance with the request transmitted from the service server 90 to the relay server via the web server 30, and the response information according to the instruction is returned from the MFP 82, the relay server Response information is transmitted from 50 to the web server 30.

  As described above, the device information of each MFP 82, 84, 86 is stored in the database 96. The device information stored in the database 96 is used when the MFPs 82, 84, 86 perform scan processing, print processing, and the like based on a command from the PC 88. Specifically, the PC 88 acquires device information of the MFPs 82, 84, 86 from the database 96 via the service server 90 and the web server 30. Then, the PC 88 designates the MFPs 82, 84, and 86 that are online based on the acquired device information, and transmits a command such as scan processing to the designated MFPs 82, 84, and 86. At this time, the PC 88 transmits a command such as a scan process to the web server 30 via the service server 90. Then, the web server 30 transmits a command such as scan processing to the relay server 50 or 70 via the load balancer 80, and the relay server 50 or 70 issues a command such as scan processing to the designated MFP 82, 84, 86. Send. As a result, in accordance with a command from the PC 88, the designated MFP 82, 84, 86 performs a scanning process or the like. As described above, in the communication system 100, various processes are performed by the MFPs 82, 84, and 86 using the communication system 100.

  On the other hand, for example, when a communication failure occurs between the relay server 50 and the load balancer 80, in the relay server 50, the communication state between the relay server 50 and the MFPs 82, 84, 86 is offline. To be judged. At this time, the relay server 50 transmits device information for each of the MFPs 82, 84, 86 to the web server 30. That is, the device information of the MFP 82, the device information of the MFP 84, and the device information of the MFP 86 are sequentially transmitted. Then, the web server 30 sequentially transmits the device information of the MFP 82, the device information of the MFP 84, and the device information of the MFP 86 to the database 96. In this description, since there are three MFPs connected to the relay server 50, the web server 30 transmits and receives device information three times. For example, 30 MFPs are connected to the relay server 50. The device information is transmitted and received 30 times, and when thousands of MFPs are connected to the relay server 50, the device information is transmitted and received thousands of times. For this reason, the load on the web server 30 increases due to transmission / reception of device information, and there is a possibility that various processes by the MFPs 82, 84, 86 using the communication system 100 cannot be executed.

<Management of Device Information in the Communication System of the Present Invention>
For this reason, in the communication system 1, device information is managed using the information processing server 10 and the queue 92. Specifically, as shown in FIG. 3, in the communication system 1, the MFPs 82, 84, 86 and the relay servers 50, 70 transmit / receive data via the load balancer 80. In addition, data is transmitted / received between the relay servers 50 and 70 and the queue 92, and data is transmitted / received between the queue 92 and the information processing server 10. Further, data transmission / reception is performed between the information processing server 10 and the database 96, and data transmission / reception is performed between the PC 88 and the web server 30 via the service server 90. The web server 30 exchanges data with the database 96 and the relay servers 50 and 70.

  In the communication system 1, in the configuration shown in FIG. 3, the relay servers 50 and 70 transmit device information to the queue 92, and the queue 92 stores the received device information. On the other hand, the information processing server 10 reads and acquires device information from the queue 92 at predetermined time intervals. For example, the predetermined time may be 5 seconds. Note that acquiring at every predetermined time does not mean acquiring at exactly the same time but is a concept that may have a certain range. For example, after the device information is read and stored in the database 96, it may be acquired after 5 seconds. At this time, the number of pieces of device information to be acquired is a predetermined number, for example, 6 or less. That is, even when the device information of 30 or thousands of MFPs is stored in the queue 92, 6 pieces of device information are transmitted. For this reason, for example, because of a communication failure between the relay server 50 and the load balancer 80, information that should have arrived at the relay server 50 at a certain period from the MFP does not arrive, and the relay server communicates with each MFP. Even if 30 or thousands of device information indicating the offline state is transmitted from the relay server 50 to the queue 92, the information processing server 10 and the queue 92 Since only six pieces of device information are transmitted in one cycle every predetermined time, it is possible to suppress the information processing server 10 from being loaded at a stretch in a short time. Further, when a communication failure occurs between the relay server 50 and the load balancer 80, a reply to the information transmitted from the MFP to the relay server 50 does not come. For this reason, each of 30 or thousands of MFPs determines that they are offline with the relay server 50 at approximate timing. Then, each of the 30 or several thousand MFPs transmits information for setting the online state to the relay server 50 at approximate timing. Also in this case, 30 or thousands of device information indicating the online state is transmitted from the relay server 50 to the queue 92. However, between the information processing server 10 and the queue 92, a predetermined time interval is transmitted. In one cycle, only 6 pieces of device information are transmitted.

  Further, the information processing server 10 creates a device list indicating the online state and a device list indicating the offline state based on the acquired device information of the MFP, and transmits the device list indicating the online state as one piece of information. A device list indicating an offline state is transmitted as one piece of information. That is, for example, when device information of six MFPs A to F is received, and MFPs A, C, D, and E are online and MFPs B and F are offline, MFPs A, C, An online device list indicating that D and E are online is created, and an offline device list indicating that MFP B and F are offline is created. Then, the information processing server 10 transmits the online device list and the offline device list to the database 96. As a result, the number of transmissions from the information processing server 10 to the database 96 can be reduced, and the load on the information processing server 10 can be suppressed.

  Thus, in the communication system 1, it is possible to suppress the load on the information processing server 10 by managing device information using the information processing server 10 and the queue 92. Thereby, it is possible to prevent a load from being concentrated on a specific server or the like and to construct a stable communication system. In the communication system 1, data transmission / reception between the PC 88 and the MFPs 82, 84, 86 and data transmission / reception between the PC 88 and the database 96 are performed without going through the information processing server 10 and the queue 92. Therefore, it is possible to appropriately ensure the execution of various processes by the MFPs 82, 84, 86 using the communication system 1. In the following, the operation of each device, server, etc. when the device information is managed in the communication system 1 will be described in detail with reference to sequence diagrams.

<Establishing communication between MFP and relay server>
In the communication system 1, as shown in FIG. 4, first, register information is transmitted from the MFPs 82, 84, 86 to the web server 30 (M100). The register information includes a request for transmitting authentication information used in a session according to XMPP over BOSH (hereinafter sometimes referred to as “XMPP session”) to the MFPs 82, 84, 86, and the MFP 82, 84, 86 Contains specific information.

  Receiving the register information, the web server 30 transmits the register information to the database 96 (M102). Then, the database 96 registers unique information of the MFPs 82, 84, 86, generates authentication information, and transmits the authentication information to the web server 30 (M104). Receiving the authentication information, the web server 30 transmits the authentication information to the MFPs 82, 84, 86 (M106).

  The MFPs 82, 84, 86 use the acquired authentication information to establish an XMPP session with the relay servers 50, 70 (M108). Specifically, the MFPs 82, 84, and 86 transmit authentication information to the relay servers 50 and 70 according to XMPP over BOSH. When the relay servers 50 and 70 receive the authentication information, the relay servers 50 and 70 transmit response information indicating OK to the MFPs 82, 84, and 86 in accordance with XMPP over BOSH. As described above, the MFPs 82, 84, 86 and the relay servers 50, 70 acquire the authentication information through transmission / reception of various information according to the XMPP over BOSH, thereby establishing the XMPP session.

  Next, the MFPs 82, 84, 86 establish a connection according to XMPP (hereinafter may be described as “XMPP connection”) with the relay servers 50, 70 (M 110). Specifically, the MFPs 82, 84, 86 transmit a session ID for identifying a session established with the relay server 50 and request information for requesting establishment of an XMPP connection to the relay servers 50, 70. When the relay servers 50 and 70 receive the session ID and the request information and confirm that the session indicated by the session ID has been established, the request is made between the MFP 82, 84, 86 and the relay servers 50, 70. An XMPP connection corresponding to the information is established. That is, by establishing an XMPP session, it is possible to establish an XMPP connection between the MFPs 82, 84, 86 and the relay server 50. The MFPs 82, 84, and 86 are connected to the Internet 98 via a router. For this reason, information sent from the MFP 82, 84, 86 to the Internet 98 side and a reply to the information are sent by the router, but sent from the Internet 98 side to the MFP 82, 84, 86 other than the reply. Information is not passed by the router. However, when the XMPP connection is established, if the communication uses the established XMPP connection, the router passes the information transmitted from the Internet 98 side to the MFPs 82, 84, 86. When a certain time has elapsed since the establishment, in the communication using the XMPP connection, the router does not pass the information transmitted from the Internet 98 side to the MFPs 82, 84, 86. Therefore, after the XMPP session is established, the MFPs 82, 84, and 86 request establishment of an XMPP connection at regular intervals. The constant period is, for example, a period of 2 minutes. In addition, a fixed period is not only showing exactly every same time but also a concept having a certain range.

<Registering device information indicating online status in database>
When the XMPP connection is established, the relay servers 50 and 70 transmit device information indicating the online state (hereinafter may be referred to as “online message”) to the queue 92 (M112). The queue 92 stores received online messages. On the other hand, the information processing server 10 makes a message inquiry to the queue 92 every predetermined time (M114). At this time, if there is a message in the queue 92, the information processing server 10 acquires a predetermined number or less of messages from the queue 92 (M116). Then, the information processing server 10 processes the acquired predetermined number of messages or less, and creates an online device list and an offline device list as described above.

  At this time, in the information processing server 10, when there are a plurality of acquired messages and the device information related to the same MFP exists in the plurality of messages, only the latest device information is written in the list, and other than the latest device information. The device information is not written to the list. Specifically, for example, a case where the information processing server 10 acquires five pieces of device information as illustrated in FIG. In the left column of the figure, the name of the MFP that is the target of the device information is written. In the middle column, whether the MFP and the relay servers 50 and 70 are online or offline is written. In the right column, the time when the device information is acquired by the queue 92 (hereinafter may be described as “time stamp”) is written. In the information processing server 10, when the five pieces of device information shown in the figure are acquired, first, the device information in the top column is processed.

  In the device information processing, the MFP name is checked, and whether or not the device information of the same MFP is written to the list is checked. That is, it is checked whether MFP A is written in the list. Of course, in the device information in the top column, since writing to the list is 0, MFP A is not written to the list. Therefore, MFP A is written in the online device list based on the device information in the top column.

  Next, in the device information in the second column from the top, it is checked whether MFP B is written in the list. Since only MFP A is written in the list, MFP B is not written. Therefore, MFP B is written in the offline device list based on the device information in the second column from the top. Thereafter, a check similar to the above check is performed on the device information in the third and fourth columns from the top, and MFP C is written in the online device list based on the device information in the third column from the top. MFP D is written in the online device list based on the device information in the fourth column from the beginning.

  Subsequently, in the device information in the fifth column from the top, whether or not MFP A is written in the list is checked, but as described above, MFP A is written in the online device list. For this reason, the time stamp of the device information in the fifth column from the top is compared with the device information written in the online device list, that is, the time stamp of the device information in the top column. Is new information. At this time, if the device information in the fifth column from the top is newer than the device information in the top column, the device information in the top column is rewritten with the device information in the fifth column from the top. . That is, MFP A is deleted from the online device list, and MFP A is written in the offline device list. However, as can be seen from the figure, the device information in the fifth column from the top is older than the device information in the top column. For this reason, the device information in the fifth column from the top is not written to any list but discarded. This prevents old information from being written to the list.

  When the online device list and the offline device list are created by the above-described method, each list is individually transmitted from the information processing server 10 to the database 96. Note that the description in FIG. 4 is given taking as an example the case where the queue 92 receives an online message, so the online device list in which a predetermined MFP name is written is transmitted from the information processing server 10 to the database 96. (M118). In the database 96, the device information of the predetermined MFP is updated to online information.

  Further, as described above, in the information processing server 10, a message inquiry to the queue 92 is performed every predetermined time, but based on processing in the information processing server 10, that is, based on a plurality of device information, If it takes a long time to create the online device list and the offline device list, a message inquiry to the queue 92 is made without waiting for a predetermined time.

  Specifically, in the information processing server 10, the processing time in the information processing server 10 is measured, and when the processing time is less than the set time, a message inquiry to the queue 92 is performed every predetermined time. Is called. On the other hand, when the processing time is equal to or longer than the set time, the message is inquired to the queue 92 again after a predetermined time elapses after the message is inquired to the queue 92. As a result, it is possible to prevent unregistered messages in the queue 92 from being left for a long time.

<Inquiry about device information>
In the communication system 1, as described above, various processes by the MFPs 82, 84, and 86 are performed using the device information stored in the database 96. At this time, an inquiry about device information is made from the PC 88. The device information inquiry is transmitted from the PC 88 to the service server 90. The service server 90 transfers the device information inquiry to the web server 30 (M120).

  Next, the web server 30 inquires device information from the database 96 (M122). Then, the database 96 transmits device information to the web server 30 as a reply to the inquiry (M124). The web server 30 that has received the device information transmits the device information to the service server 90 (M126), and the device information is transmitted from the service server 90 to the PC 88. As a result, the PC 88 can specify a communicable MFP based on the device information.

<Scan processing by MFP using communication system>
In the communication system 1, as described above, scan processing is performed by the MFPs 82, 84, 86 using the communication system 1. Specifically, in the PC 88, communicable MFPs 82, 84, 86 are specified based on device information acquired from the database 96. Then, an arbitrary MFP is determined from communicable MFPs 82, 84, 86, and an instruction to execute scan processing by the determined MFP is transmitted from the PC 88 to the service server 90. Receiving the scan instruction, the service server 90 transmits a scan instruction for a predetermined MFP to the web server 30 as shown in FIG. 5 (M128).

  The web server 30 inquires of the database 96 about device information related to the MFPs 82, 84, and 86 that are the targets of the received scan instruction (M130). The database 96 transmits device information related to the predetermined MFPs 82, 84, 86 to the web server 30 as a reply to the inquiry (M132). The web server 30 that has received the device information checks whether or not the MFPs 82, 84, and 86 that are the target of the scan instruction are online, and the MFPs 82, 84, and 86 that are the target of the scan instruction are online. If it is in a state, a scan instruction is transmitted to the relay servers 50 and 70 (M134). Further, after transmitting the scan instruction to the relay servers 50 and 70, the web server 30 transmits reception information indicating that the scan instruction has been transmitted to the service server 90 (M136).

  The relay servers 50 and 70 that have received the scan instruction transmit the scan instruction to the MFPs 82, 84, and 86 that are the target of the scan instruction using the XMPP connection established with each MFP (M138). . In the example of FIG. 4, all transmissions of information from the relay server to the MFP for which the XMPP connection is established are performed using the XMPP connection. Receiving the scan instruction, the MFPs 82, 84, 86 execute scan processing (M140), and generate scan data. Next, the MFPs 82, 84, 86 transmit the scan data to the web server 30 (M142). Then, the web server 30 transmits the scan data to the service server 90 (M144), and the service server 90 transmits the scan data to the PC 88. As a result, the PC 88 acquires the scan data generated by the MFPs 82, 84, 86. The web server 30 that has received the scan data transmits completion information indicating that the scan data reception has been completed to the MFPs 82, 84, and 86 (M146).

<Registering device information indicating offline status into the database>
Further, in the communication system 1, when the XMPP connection becomes invalid, that is, when communication between the MFPs 82, 84, 86 and the relay servers 50, 70 becomes impossible, the device information in the database 96 is The online status is updated to the offline status. Specifically, when the XMPP connection becomes invalid (M148), the relay servers 50 and 70 transmit device information indicating an offline state (hereinafter, may be described as “offline message”) to the queue 92 (M150). ). When the XMPP connection becomes invalid, the MFPs 82, 84, 86 may transmit information for discarding the XMPP connection to the relay server 50. Since the information requesting establishment of the XMPP connection transmitted from the MFPs 82, 84, 86 to the relay server 50 at regular intervals has not arrived at the relay server 50, the relay server 50 has invalidated the XMPP connection. It may be judged. In particular, when a communication failure occurs between the relay server 50 and the load balancer 80, the relay server 50 determines that the XMPP connection with a large number of MFPs has become invalid, and a large number of offline messages. Will be sent to the queue 92. Alternatively, the load balancer 80 may determine that information requesting the relay server 50 to establish an XMPP connection has not arrived from the MFPs 82, 84, 86. In this case, when the load balancer 80 transmits information indicating that the XMPP connection has become invalid and the relay server 50 receives the information, the relay server 50 can also determine that the XMPP connection has become invalid. The queue 92 that has received the offline message stores the received offline message. On the other hand, the information processing server 10 makes a message inquiry to the queue 92 every predetermined time (M152). At this time, the information processing server 10 acquires an offline message from the queue 92 (M154). In the information processing server 10 that has acquired the offline message, the above-described processing is performed, and the offline device list in which the predetermined MFP name is written is transmitted from the information processing server 10 to the database 96 (M156). Thereby, in the database 96, the device information of the predetermined MFP is updated to offline information. The MFP 82, 84, 86 establishes an XMPP session with the relay servers 50, 70 when the reply to the information requesting establishment of the XMPP connection does not come from the relay server 50 (M 108), and the XMPP connection Is established (M110). That is, when a communication failure occurs between the relay server 50 and the load balancer 80, the XMPP connection between the large number of MFPs and the relay server 50 is reestablished. Will be sent to.

<Information server communication program and web server communication program>
The above-described management of the device information in the communication system 1 in the communication system 1 and the scan processing by the MFPs 82, 84, 86 using the communication system 1 are executed by the CPU 12 of the information processing server 10 by the communication program 20a. 40 a is executed by the CPU 32 of the web server 30. Hereinafter, a flow when the communication program 20a is executed by the CPU 12 of the information processing server 10 will be described with reference to FIGS. 7 and 8, and the communication program 40a of the web server 30 will be described with reference to FIGS. A flow when executed by the CPU 32 will be described.

  When the communication program 20a is started in the information processing server 10, the processing of the flow shown in FIGS. 7 and 8 is started. In S100, the CPU 12 makes a message inquiry to the queue 92 as described in <Registering device information indicating online state in the database> and <Registering device information indicating offline state in the database>. Data for output is output via the OS 20b. Then, the process proceeds to S102. In S <b> 102, the CPU 12 determines whether a message has been acquired from the queue 92 as a result of the inquiry to the queue 92. If a message is acquired from the queue 92 (S102: YES), the process proceeds to S104.

  In S104, the CPU 12 checks the content of the message. Then, the process proceeds to S106. In S106, the CPU 12 determines whether the message time stamp is newer than the processed time stamp as a result of the message content check. Specifically, it is determined whether or not there are a plurality of messages. If there are a plurality of messages, each time the message is confirmed, whether or not the name of the target MFP of the message being confirmed is written in the list. Determined. If the target MFP name of the message being confirmed is written in the list, the time stamp of the message being confirmed is compared with the time stamp of the message that is the basis of the MFP written in the list. . At this time, if the time stamp of the message being confirmed is newer than the time stamp of the message that is the basis of the MFP written in the list (S106: YES), the process proceeds to S108. Note that the process also proceeds to S108 when there is no plurality of messages and when the name of the target MFP for the message being confirmed is not written in the list.

  In S108, the CPU 12 determines whether or not the message is an online message. When the message is an online message (S108: YES), the process proceeds to S110. In S110, the CPU 12 writes the name of the MFP that is the subject of the message in the online device list. Then, the process proceeds to S114. On the other hand, when the message is an offline message (S108: NO), the process proceeds to S112. In S112, the CPU 12 writes the name of the target MFP for the message in the offline device list. Then, the process proceeds to S114. In S106, if the time stamp of the message being confirmed is older than the time stamp of the message that is the basis of the MFP written in the list (S106: NO), the process also proceeds to S114.

  In S114, the CPU 12 determines whether or not all the acquired messages have been checked. If all the messages have not been checked (S114: NO), the process returns to S104. On the other hand, if all messages have been checked (S114: YES), the process proceeds to S116. In S116, the CPU 12 determines whether the online device list is empty, that is, whether the MFP name is written in the online device list. If the online device list is not empty (S116: NO), that is, if the MFP name is written in the online device list, the process proceeds to S118.

  In S118, the CPU 12 outputs data for transmitting data for changing the device information of the MFP written in the online device list to online to the database 96 via the OS 20b. Then, the process proceeds to S120. Further, if the online device list is empty (S116: YES), that is, if the MFP name is not written in the online device list, the process proceeds to S120.

  In S120, the CPU 12 determines whether the offline device list is empty, that is, whether the MFP name is written in the offline device list. If the offline device list is not empty (S120: NO), that is, if the MFP name is written in the offline device list, the process proceeds to S122.

  In S122, the CPU 12 outputs data for transmitting data for changing the device information of the MFP written in the offline device list to offline to the database 96 via the OS 20b. Then, the process proceeds to S124. If the offline device list is empty (S120: YES), that is, if the MFP name is not written in the offline device list, the process proceeds to S124.

  In S124, the CPU 12 determines whether or not the processing time is equal to or longer than the set time. If the processing time is not longer than the set time (S124: NO), the process proceeds to S126. In addition, when the message is not acquired from the queue 92 in S102 (S102: NO), the process proceeds to S126. In S126, the CPU 12 waits for the elapse of a predetermined time. That is, it sleeps for a predetermined time. Then, the process returns to S100 and the subsequent processing is performed. On the other hand, when the processing time is equal to or longer than the set time (S124: YES), the process proceeds to S128. In S128, the CPU 12 waits for a time shorter than a predetermined time. That is, it sleeps for a time shorter than a predetermined time. Then, the process returns to S100 and the subsequent processing is performed.

  Moreover, when the communication program 40a is started by the web server 30, the process of the flow shown in FIGS. 9 and 10 is started. In S200, the CPU 32 determines whether the data generated by receiving the request is received via the OS 40b. If the request has not been received (S200: NO), the process of S200 is repeated. On the other hand, if a request has been received (S200: YES), the process proceeds to S202.

  In S202, the CPU 32 determines whether or not the received request is register information. If the received request is register information (S202: YES), the process proceeds to S204. In S204, the CPU 32 outputs data for transmitting register information to the database 96 via the OS 40b, as described in <Establishing communication between MFP and relay server>. Then, the process proceeds to S206. In S <b> 206, the CPU 32 receives authentication information from the database 96. Then, the process proceeds to S208. In S208, the CPU 32 outputs data for transmitting authentication information to the MFPs 82, 84, 86 via the OS 40b. Then, the process returns to S200.

  If the request received in S202 is not register information (S202: NO), the process proceeds to S210. In S <b> 210, the CPU 32 determines whether the received request is an inquiry from the service server 90. If the received request is an inquiry from the service server 90 (S210: YES), the process proceeds to S212. In S212, the CPU 32 outputs data for executing a device information inquiry to the database 96 via the OS 40b, as described in <Device Information Inquiry>. Then, the process proceeds to S214. In S <b> 214, the CPU 32 receives device information from the database 96. Then, the process proceeds to S216. In S216, the CPU 32 outputs data for transmitting device information to the service server 90 via the OS 40b. Then, the process returns to S200.

  If the request received in S210 is not an inquiry from the service server 90 (S210: NO), the process proceeds to S218. In S218, the CPU 32 determines whether or not the received request is scan data. If the received request is scan data (S218: YES), the process proceeds to S220. In S220, the CPU 32 outputs data for transmitting scan data to the service server 90 via the OS 40b, as described in <Scan Process by MFP Using Communication System>. Then, the process returns to S200.

  If the request received in S218 is not scan data (S218: NO), the process proceeds to S222. In S222, the CPU 32 executes another process different from the above process. Then, the process returns to S200.

<Modification>
In this embodiment, the queue 92 for storing the device information and the information processing server 10 for processing the device information are separate devices. However, the queue 92 and the information processing server 10 are combined into one. It is possible to device. That is, the relay servers 50 and 70 can transmit device information to an apparatus having the function of the queue 92 and the function of the information processing server 10, and the apparatus can process the device information and transmit it to the database 96. It is. Further, the queue 92 and the relay servers 50 and 70 can be made one device. That is, the relay server 50 stores the device information in a memory that can be used by the function of the queue 92 provided in the same apparatus as the relay servers 50 and 70, and the information processing server 10 It is possible to acquire device information from an apparatus having the above functions and the functions of the relay servers 50 and 70. Of course, if the queue 92, the relay servers 50 and 70, and the information processing server 10 are separate devices, the burden on the relay servers 50 and 70 and the information processing server 10 is reduced.

  Further, the database 96 and the web server 30 can be combined into one device. In this case, in response to a request from the service server 90 or the like, the web server 30 reads and acquires information stored in a memory that can be used by the function of the database 96 provided in the same device as the web server 30. Of course, if the database 96 and the web server 30 are separate devices, the burden on the web server 30 is reduced.

  In the present embodiment, when the web server 30 acquires scan data from the MFPs 82, 84, 86, the scan data is transferred to the service server 90. However, the transfer method to the service server 90 by the callback method is used. Can be used. The callback method is a method in which, when the web server 30 receives scan data, information indicating that the scan data has been received is transmitted to the service server 90, and the service server 90 acquires the scan data from the web server 30. .

  Further, the request that the web server 30 receives in S218 is not limited to a request for scan data. It may be a request for status information or setting information of the MFPs 82, 84, 86.

  In this embodiment, information regarding the communication state between the relay servers 50 and 70 and the MFPs 82, 84, and 86 is employed as device information. Can be adopted.

  In the information processing server 10 of the present embodiment, the case where the CPU 12 executed based on the communication program 20a performs various processes has been described. However, it is not limited to this form. The CPU 12 executed based on the communication program 20a may issue an instruction to perform various processes to the OS 20b, other systems, and hardware configurations. Moreover, in the web server 30 of this embodiment, the case where CPU32 performed based on the communication program 40a performed various processes was demonstrated. However, it is not limited to this form. The CPU 32 executed based on the communication program 40a may issue an instruction to perform various processes to the OS 40b, other systems, and hardware configurations.

  Moreover, in the said embodiment, although the flow shown in FIG.7 and FIG.8 is performed by execution of the communication program 20a of the information processing server 10, in that flow, S100, S102, S106-S116, S120, S124-S128 are performed. It is also possible not to perform processing. It should be noted that not all the processes of the above steps are performed, but a flow in which the process of any one of the steps is arbitrarily added may be used.

  Moreover, in the said embodiment, although the flow shown in FIG.9 and FIG.10 is performed by execution of the communication program 40a of the web server 30, it is also possible not to perform the process of S200-S212 and S216-S222 in the flow. It is. It should be noted that not all the processes of the above steps are performed, but a flow in which the process of any one of the steps is arbitrarily added may be used.

  In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

  The communication system 1 is an example of a communication system. The information processing server 10 is an example of an information processing server. The CPU 12 is an example of a processor. The network I / F 16 is an example of a communication unit. The web server 30 is an example of a client request processing server. The CPU 32 is an example of a processor. The relay servers 50 and 70 are examples of relay servers. The load balancer 80 is an example of a load balancer. The MFPs 82, 84, and 86 are examples of devices. The service server 90 is an example of a client device. The queue 92 is an example of a memory. The database 96 is an example of a database. The authentication information is an example of first information. The device information is an example of second information. The online device list and the offline device list are examples of third information. XMPP over BOSH is an example of a connection establishment type protocol. An XMPP session is an example of connection establishment request information. The XMPP connection is an example of maintenance information.

  The CPU 12 that executes S104 is an example of a second information reading unit. The CPU 12 that executes S118 and S122 is an example of a third information transmission unit. The CPU 12 that executes S110 and S112 is an example of information sorting means and information processing means. The CPU 32 that executes S214 is an example of a third information reading unit. The CPU 32 that executes S216 is an example of an execution unit.

  Each program may be composed of one program module or may be composed of a plurality of program modules. In addition, each example may have another replaceable configuration and is within the scope of the present invention. It may be a computer (CPU 12, CPU 32, etc.) that executes processing based on a program (communication program 20a, communication program 40a, etc.), or processing based on a program other than a communication program, such as an operating system, other applications, or a program. It may be a computer that executes, a hardware configuration that operates according to instructions from the computer, or a configuration in which the computer and the hardware configuration are linked. Of course, it may be a computer that executes processes by linking processes based on a plurality of programs, or may have a hardware configuration that operates according to instructions from a computer that executes processes by linking processes based on a plurality of programs. Good.

  Furthermore, the program that is the category of the present invention may be provided by being recorded on a non-transitory recording medium. The non-transitory recording medium may include a storage unit mounted on a server device that can be connected to the information processing server 10 and the web server 30 via a communication network, in addition to a CD-ROM, a DVD-ROM, and the like. And the program memorize | stored in the memory | storage part of the server apparatus may be delivered via communication networks, such as the internet, as the information or signal which shows the said program.

1: Communication system, 10: Information processing server, 12: CPU, 16: Network I / F, 30: Web server, 32: CPU, 36: Network I / F, 50: Relay server, 70: Relay server, 80: Load balancer, 82: MFP, 84: MFP, 86: MFP, 90: service server, 92: queue, 96: database

Claims (19)

Multiple devices,
A relay server capable of network communication with the plurality of devices;
An information processing server including a communication unit capable of network communication with a database, and a processor;
A client request processing server capable of network communication with the database, the relay server, and the client device;
A communication system comprising:
Each of the plurality of devices transmits connection establishment request information to the relay server, so that a connection according to a connection establishment type protocol is established between each of the connection establishment request information transmission source devices and the relay server. Established,
Each of the plurality of devices is
The first information including maintenance information for maintaining a connection according to the connection establishment type protocol can be transmitted to the relay server at a first timing ,
The relay server is
In response to receiving the first information, the database includes second information indicating that a connection between a transmission source device of maintenance information included in the first information and the relay server is maintained. The first information could not be received from the device that established the connection , transmitted for storage in a memory provided in a different device than the provided device, the client device, and the client request processing server. The second information indicating that the connection between the device for which maintenance information could not be acquired and the relay server is not maintained , can be transmitted to store in the memory ,
The processor is
Second information reading means for reading the second information transmitted from the relay server and stored in the memory from the memory at a second timing different from the first timing;
Communication establishment information indicating that communication is established between each of the plurality of devices and the relay server, and the second information read by the second information reading unit; Information classification means for classifying into communication non-establishment information indicating that communication is not established between each and the relay server ;
Third information transmitting means for transmitting third information based on at least one of the communication establishment information and the communication non-establishment information classified by the information classification means to the device provided with the database via the communication unit. When,
Can function and
The client request processing server processor comprises:
A third information reading means for reading the third information transmitted from the database in response to the request information received from the client device, the third information transmitted to the device provided with the database by the third information transmitting means;
Execution means for executing processing corresponding to the request information received from the client device in response to the third information reading means reading the third information;
A communication system characterized in that the communication system can function. The execution means in the client request processing server includes:
The communication system according to claim 1, wherein the third information read by the third information reading unit is transmitted to the client device. The relay server is
Of the first information transmitted from each of the plurality of devices, the period information transmitted in the first period is received and the period information cannot be received at a predetermined timing. In response, the second information regarding the communication state between each of the plurality of devices and the relay server can be transmitted for storage in the memory,
The second information reading means in the information processing server includes:
Reading the second information transmitted from the relay server and stored in the memory from the memory in a second period different from the first period;
The third information transmitting unit in the information processing server includes:
In response to the second information reading means reading the second information related to the communication state between each of the plurality of devices and the relay server, the period information is transmitted between the device and the relay server. said third information on the communication state of the database provided apparatus, transmits through the front Symbol communications unit,
The third information reading means in the client request processing server includes:
In response to receiving the request information for inquiring the communication state between one device and the relay server from the client device, the third information regarding the communication state between the one device and the relay server is obtained. Read from the database,
The execution means in the client request processing server includes:
In response to the third information reading means reading the third information after receiving the request information for inquiring the communication state between one device and the relay server from the client device, the third information 3. The process according to claim 1, wherein a process of transmitting the third information regarding the communication state between the one device and the relay server read by the reading unit to the client device is executed. Communications system. Each of the previous SL multiple devices,
Of the first information, it is possible to send a pre Ki維 lifting information in a first period,
The relay server is
In response to receiving the maintenance information, the second information indicating that the connection between the maintenance information transmission source device and the relay server is maintained is transmitted to be stored in the memory. Indicating that the connection between the device that has not obtained the maintenance information and the relay server is not maintained in response to the failure to receive the maintenance information from the device that has established the connection. Information can be transmitted for storage in the memory;
The second information reading means in the information processing server includes:
Reading the second information transmitted from the relay server and stored in the memory from the memory in a second period different from the first period;
The third information transmitting unit in the information processing server includes:
The plurality of devices in response to the second information reading means reading out the second information indicating whether or not the connection established between each of the plurality of devices and the relay server is maintained. The third information relating to maintaining a connection established between each of the servers and the relay server is transmitted to the device provided with the database via the communication unit. The communication system according to any one of the above. The relay server is
In response to receiving the maintenance information, transmission of maintenance confirmation information indicating that a connection between the maintenance information transmission source device and the relay server is maintained to the maintenance information transmission source device. Is possible and
Each of the plurality of devices is
After transmitting the maintenance information, in response to failure to receive the maintenance confirmation information, it is possible to transmit connection establishment request information and the maintenance information to the relay server,
The relay server is
After transmitting the second information indicating that the connection between the device for which maintenance information could not be acquired and the relay server is not maintained, the connection establishment request information from the device for which the maintenance information could not be acquired And the second information indicating that the connection between the maintenance information transmission source device and the relay server is maintained in the memory in response to receiving the maintenance information. 5. The communication system according to claim 4, wherein the communication system is capable of transmitting for the purpose. The execution means in the client request processing server includes:
After executing the process of transmitting the third information related to the communication state between one device and the relay server to the client device, the request information requesting an instruction to the one device is received from the client device. Accordingly, it is possible to execute processing for transmitting instruction information to the one device based on the request information to the relay server,
The relay server is
The instruction information can be transmitted to the one device in response to receiving the instruction information to the one device while the connection with the one device is maintained. The communication system according to claim 5, characterized in that: Each of the plurality of devices is
In response to receiving the instruction information from the relay server, it is possible to transmit response information based on the instruction information to the relay server as the first information,
The relay server is
After transmitting the instruction information to the one device, the response information can be transmitted to be stored as the second information in the memory in response to receiving the response information from the one device. And
The third information transmitting means includes
In response to the response information being read by the second information reading means, it is possible to transmit the response information as the third information to the device provided with the database via the communication unit. ,
The execution means in the client request processing server includes:
After the request information requesting an instruction to the one device is received from the client device, the response information is received in response to the third information reading means reading the response information related to the one device. The communication system according to claim 6, wherein a process to be transmitted to the client device can be executed. The memory is provided in a device different from both the information processing server and the relay server,
The communication system according to any one of claims 1 to 7, wherein the second information reading unit reads the second information from a device including the memory via the communication unit. The communication system is:
A plurality of the relay servers;
A load balancer that distributes network communication between the plurality of relay servers and the plurality of devices to any of the plurality of relay servers;
The communication system according to any one of claims 1 to 8, further comprising: The connection establishment type protocol is XMPP over BOSH (eXtensible Messaging
10. The Presence Protocol Over Bidirectional-streams Over Synchronous HTTP), the connection establishment request information is XMPP session establishment request information, and the maintenance information is XMPP connection establishment request information. The communication system according to any one of the above. A communication unit capable of network communication;
A processor;
An information processing server comprising:
Each of the plurality of devices transmits connection establishment request information to the relay server, whereby a connection according to the connection establishment type protocol is established between each of the connection establishment request information transmission source devices and the relay server. If
The processor is
Information based on first information transmitted from each of the plurality of devices to the relay server at a first timing and including maintenance information for maintaining a connection according to the connection establishment type protocol, from the relay server The second information indicating whether or not the connection between the transmission source device of the maintenance information included in the first information and the relay server transmitted and stored in the memory is maintained from the memory, Second information reading means for reading at a second timing different from the first timing;
Communication establishment information indicating that communication is established between each of the plurality of devices and the relay server, and the second information read by the second information reading unit; Information classification means for classifying into communication non-establishment information indicating that communication is not established between each and the relay server ;
Information based on at least one of the communication establishment information and the communication non-establishment information classified by the information classification means, and stored in a database provided in a device different from the device provided with the memory A device that performs processing using the third information stored in the database in response to request information received from a client device that is a device different from the device provided with the memory, A third information transmitting means for transmitting via the communication unit to a device provided with the database connected via a network with a client request processing server which is a device different from the device provided with a memory;
An information processing server characterized by being capable of functioning as a server. The third information transmitting means includes
The device targeted by the second information and the relay server in response to the second information reading means reading out the second information related to the communication state between each of the plurality of devices and the relay server The information processing server according to claim 11, wherein the third information related to a communication state between the information processing apparatus and the information processing apparatus is transmitted to the apparatus including the database via the communication unit. The second information reading means includes
A connection according to a connection establishment type protocol established between the relay server and each of the plurality of devices based on connection establishment request information transmitted from each of the plurality of devices to the relay server, In order to maintain the second information indicating whether or not maintained by the maintenance information transmitted in each of the first period from each of the transmission source device of the connection establishment request information from the memory, the first period Read in a different second period,
The third information transmitting means includes
The plurality of transmissions in response to the second information reading means reading the second information indicating whether or not the connection established between each of the plurality of devices and the relay server is maintained. 13. The third information related to maintaining a connection established between each of the original devices and the relay server is transmitted to the apparatus provided with the database via the communication unit. Information processing server described in 1. The third information transmitting means includes
Transmission of the connection establishment request information transmitted by the relay server that has failed to receive the maintenance information from the device that is the transmission source of the connection establishment request information and stored in the memory within the period for maintaining the connection Connection between the transmission source device of the connection establishment request information and the relay server in response to the second information reading means reading the second information indicating that the connection with the original device is not maintained The information processing server according to claim 13 , wherein the third information indicating that is not maintained is transmitted to the apparatus including the database via the communication unit. The third information transmitting means includes
After the connection with the source device of the connection establishment request information is no longer maintained, the relay server that has received the connection establishment request information and the maintenance information from the source device of the connection establishment request information In response to the second information reading means reading the second information indicating that the connection with the transmission source device of the connection establishment request information transmitted and stored in the memory is maintained, Transmitting the third information indicating that the connection between the transmission source device of the connection establishment request information and the relay server is maintained to the apparatus including the database via the communication unit. The information processing server according to claim 14 , wherein the information processing server is characterized in that: The third information transmitting means includes
The request information for inquiring about a communication state between one device and the relay server is transmitted from the client server received from the client device via the client request processing server and stored in the memory. The connection between the one device and the relay server is maintained in response to the second information reading means reading the second information indicating that the connection between the device and the relay server is maintained. Transmitting the third information indicating that the information has been sent to the device provided with the database via the communication unit;
After transmitting the third information indicating that the connection between the one device and the relay server is maintained, the request information for requesting an instruction to the one device is sent to the client request processing server. Sent from the client device via the relay server that has received the response information sent from the one device and sent the request information to the one device using the maintained connection. In response to the response information stored in the memory being read as the second information by the second information reading means, the communication information is added to the apparatus provided with the database as the response information as the third information. The information processing server according to claim 13 , wherein the information processing server transmits the information through the server. The processor is
It is possible to function as information processing means for processing a predetermined number of the second information read by the second information reading means into the third information equal to or less than the predetermined number,
The third information transmitting means includes
The third information follows the predetermined number that have been processed by said information processing means, via the communication unit, one of claims 13 to 16 and transmits to the database provided apparatus 1 Information processing server according to item. The second information reading means includes
When reading the second information from the memory every predetermined time, if the processing time by the information processing means is a set time or more, the second information is read from the memory and then the next period in the second period. The information processing server according to claim 17 , wherein the second information is read from the memory before the period becomes. The third information transmitting means includes
If the second information relating to the same device exists in the predetermined number of second information read by the second information reading means, the latest information of the information relating to the same device is obtained. The third information is transmitted to the apparatus provided with the database as the third information, and the second information other than the latest second information among the information related to the same device is transmitted to the communication unit. The information processing server according to claim 17 or 18 , wherein the information processing server is not transmitted to a device provided with the database.

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