JP2012014541A - Information system, core server, service server control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that an overall response performance can not be improved while satisfying a service provision policy such as a license restriction different for each service provider.SOLUTION: A core server includes: a service restriction information storage section capable of storing one or more service restriction information items each having a service identifier and restriction information of the service; a core server receiving section for receiving a service request from a terminal device; a service server determination section for acquiring restriction information to be paired with a service identifier contained in the service request and carrying out a service corresponding to the service request so as to improve an overall response performance for satisfying the restriction information; and a core server transmitting section for transmitting a service request to the determined service server. A service server to provide a service can be determined by the core server so as to improve the response performance while satisfying a service provision policy.

Description

  The present invention relates to an information system or the like that executes a service so as to improve the overall response performance while satisfying the restrictions in providing the service.

  Conventionally, there has been a Web server system capable of distributing a load to a Web server with a small load (see Patent Document 1).

  In addition, there has been a content server system in which a user can experience an improvement in communication speed by reducing the overhead time required for name resolution and reducing the communication load on the DNS server (see Patent Document 2).

JP 2009-237835 A (first page, FIG. 1 etc.) JP 2010-103844 (first page, FIG. 1 etc.)

However, in conventional systems, when multiple services are used in a large-scale network environment, processing is performed so that the overall response performance is improved while satisfying service provision policies such as license restrictions that differ depending on the service provider. I couldn't.
Therefore, in the present invention, when a plurality of services are used in a large-scale network environment, the service is set so that the overall response performance is improved while satisfying a service provision policy such as a license restriction that varies depending on the service provider. The purpose is to determine the service server to be provided.

  The information system of the first invention is an information system having two or more terminal devices, two or more service servers, and one or more core servers, wherein the terminal device is a service having a service identifier for identifying a service. A terminal reception unit that receives a service request that is a request, a terminal transmission unit that transmits a service request to a core server, a terminal reception unit that receives a service result in response to transmission of the service request, and a terminal reception unit A terminal output unit for outputting a service result, wherein the service server stores one or more processing units for performing the service, and a service server receiving unit that receives a service request from the core server. In accordance with the service request received by the service server and the service server receiver, A service unit that acquires a service result and a service server transmission unit that transmits a service result of the service unit, and the core server includes a service identifier that identifies the service and constraint information that is information related to the service constraint. A constraint information storage unit capable of storing one or more service constraint information, a core server reception unit that receives a service request from a terminal device, and constraint information that is paired with a service identifier included in the service request; A service server determination unit that determines a service server that performs a service corresponding to a service request so as to satisfy information and improve overall response performance, and a service server determined by the service server determination unit And an information system including a core server transmission unit that transmits a service request.

  With this configuration, when multiple services are used in a large-scale network environment, services that provide services so that overall response performance is improved while satisfying service provision policies such as license restrictions that vary depending on the service provider. You can determine the server.

  Further, in the information system of the second aspect of the invention, in contrast to the first aspect of the invention, the core server is history information that is information indicating the past usage status of the service for each user or for each user group including two or more users. The service server determination unit obtains the constraint information that is paired with the service identifier included in the service request, satisfies the constraint information, and uses the history information. This is an information system that determines a service server that performs a service corresponding to a service request so that overall response performance is improved.

  With this configuration, it is possible to determine with high accuracy a service server that provides a service so as to improve the overall response performance using history information indicating the past usage status of the service.

  Further, in the information system of the third invention, in contrast to the first or second invention, the core server can store reservation information that is information indicating a service use schedule for each user or each user group. An information storage unit is further provided, and the service server determination unit acquires the constraint information that is paired with the service identifier included in the service request, satisfies the constraint information, and uses the reservation information to improve the overall response performance. In order to improve, the information system determines a service server that performs a service corresponding to a service request.

  With this configuration, it is possible to determine a service server that provides a service with high accuracy so that the overall response performance is improved using reservation information indicating a service use schedule.

  In addition, the information system of the fourth aspect of the invention provides a service that provides a service so that the overall response performance is improved by using reservation information indicating a use schedule for any of the first to third aspects of the invention. The core server that can determine the server with high accuracy is a service server determination unit that determines a first service server that performs one service, a service request transmission unit that transmits a service request to the first service server, While a service is being performed on one service server, a dynamic history information acquisition unit that acquires dynamic history information, which is information indicating service usage, and constraint information that is paired with a service identifier included in a service request are acquired. In order to satisfy the constraint information and to improve the overall response performance using the dynamic history information, the service corresponding to the service request is performed. If the second service server is different from the first service server that previously performed the service, the service server is instructed to stop the service. The information system further includes a dynamic service server changing unit that transmits a stop command to be transmitted and transmits a service request to the second service server.

  With this configuration, it is possible to dynamically change a service server that provides a service while grasping the usage status of the service while providing the service.

  In the information system according to the fifth aspect of the present invention, the service request is a request for a service having a service identifier for identifying a composite service combining two or more services. The service server determination unit obtains two or more pieces of constraint information paired with two or more service identifiers for identifying each of two or more services constituting the composite service included in the service request, and all the two or more pieces of constraint information are obtained. It is an information system that determines a service server that performs a service corresponding to a service request so as to satisfy.

  With this configuration, even when providing a composite service consisting of a plurality of services, a service server that provides services so as to improve overall response performance while satisfying service provision policies such as license restrictions that differ depending on the service provider Can be determined.

  Further, in the information system of the sixth invention, in contrast to any one of the first to fifth inventions, when the core server transmitting unit changes the service server that performs one service, the first service is given first. A service command is sent to the first service server that has been executed to stop the service, and the service server determination unit determines that the service is to be newly executed. The service server receiving unit receives the stop command, and the service unit is an information system that stops the execution of the processing means when the service server receiving unit receives the stop command.

  With this configuration, it is possible to appropriately switch the service server that provides the service.

  Further, in the information system of the seventh invention, in contrast to any one of the first to fifth inventions, when the core server transmission unit changes the service server that performs one service, the first service is given first. Corresponding to a stop command indicating that the service is to be stopped for the first service server that has been performed, and one service for the second service server that the service server determination unit has determined to newly perform the service A copy instruction for instructing copying of the processing means and a delete instruction for instructing deletion of the processing means corresponding to one service are transmitted, and the processing means copied according to the copy instruction is activated to the second service server. The service server transmits a service request, the service server receiving unit receives a stop command, a copy command, and a delete command from the core server. When the receiving unit receives a stop command, the processing means corresponding to the stop command is stopped. When the service server receiving unit receives a copy command, the processing unit corresponding to the copy command is copied to the second service server. When the service server receiving unit receives the deletion command, the information processing system deletes the processing unit corresponding to the deletion command from the processing unit storage unit.

  With this configuration, it is possible to appropriately switch the service server that provides the service.

  According to the information system of the present invention, when a plurality of services are used in a large-scale network environment, the overall response performance is improved while satisfying a service provision policy such as a license restriction that varies depending on the service provider. A service server that provides a service can be determined.

Conceptual diagram of the information system in the first embodiment Block diagram showing the internal configuration of the information system Flow chart for explaining the operation of the terminal device Flow chart explaining operation of the service server Flow chart explaining operation of the core server A flowchart for explaining the operation of the service server determination process Figure showing the same user information management table Figure showing the service restriction information management table Figure showing the same history information management table Figure showing the reservation information management table Figure showing the composite service management table Figure showing the same history information management table Overview of the computer system Block diagram of the computer system

  Hereinafter, embodiments of an information system and the like will be described with reference to the drawings. In addition, since the component which attached | subjected the same code | symbol in embodiment performs the same operation | movement, description may be abbreviate | omitted again.

(Embodiment 1)
In the present embodiment, an information system having two or more terminal devices, two or more service servers, and one or more core servers, and provides services so that overall response performance is improved while satisfying the constraints. An information system to be described will be described.

  Also, in the present embodiment, an information system that provides a service so as to improve the overall response performance using history information indicating the past usage status of the service, reservation information indicating the service usage schedule, and the like will be described. To do.

  Furthermore, in the present embodiment, an information system that can dynamically change a service server that provides a service while grasping the service usage status while the service is being provided will be described.

  FIG. 1 is a conceptual diagram of the information system in the present embodiment. The information system includes two or more terminal devices 1, two or more service servers 2, and one or more core servers 3. In addition, two or more terminal devices 1, two or more service servers 2, and one or more core servers 3 can communicate with each other via a network 4 such as the Internet, a LAN, or a WAN.

  Two or more terminal devices 1 are usually distributed in two or more countries. However, two or more terminal devices 1 may exist in one country. Two or more service servers 2 are usually distributed in two or more countries. However, two or more service servers 2 may exist in one country. Further, in the present embodiment, when there are two or more core servers 3, the two or more core servers 3 are usually distributed in two or more countries. However, two or more core servers 3 may exist in one country.

FIG. 2 is a block diagram showing an internal configuration of the information system in the present embodiment.
The terminal device 1 includes a terminal reception unit 11, a terminal transmission unit 12, a terminal reception unit 13, and a terminal output unit 14.

  The service server 2 includes a processing unit storage unit 21, a service server reception unit 22, a service unit 23, a service server transmission unit 24, a processing unit storage unit 25, and a processing unit deletion unit 26.

  The core server 3 includes a user information storage unit 301, a service constraint information storage unit 302, a history information storage unit 303, a reservation information storage unit 304, a core server reception unit 305, a history information acquisition unit 306, a history information storage unit 307, reservation information. The storage unit 308 includes a service server determination unit 309, a core server transmission unit 310, a dynamic history information acquisition unit 311, and a dynamic service server change unit 312.

  The terminal reception unit 11 of the terminal device 1 receives a service request. A service request is a request for a service having a service identifier that identifies the service. The service request may be a service request having a service identifier for identifying a composite service in which two or more services are combined. A service request usually also has a user identifier. Note that the user identifier is held in advance by the terminal device 1. The user identifier is, for example, information input when the user logs in. The user identifier may be anything as long as it is information that can identify the user, such as the user ID and the IP address of the terminal device 1. In addition, the service includes an atomic service that performs one function and a composite service in which a plurality of atomic services are integrated. The service is, for example, a machine translation process, a moving image subtitle simultaneous translation service, a TV conference system service with language translation, or the like. However, the content of the service does not matter. The terminal reception unit 11 receives various instructions and data from the user.

  Here, reception means reception of information input from an input device such as a keyboard, mouse, touch panel, reception of information transmitted via a wired or wireless communication line, recording on an optical disk, magnetic disk, semiconductor memory, or the like. It is a concept including reception of information read from a medium. The service request input means may be anything such as a keyboard, mouse or menu screen. The terminal reception unit 11 can be realized by a device driver of an input unit such as a keyboard, control software for a menu screen, or the like.

  The terminal transmission unit 12 transmits the service request received by the terminal reception unit 11 to the core server 3. In addition, the terminal transmission unit 12 transmits other commands received by the terminal reception unit 11, data, and the like to the core server 3. The terminal transmission unit 12 is usually realized by wireless or wired communication means, but may be realized by broadcasting means.

  The terminal receiving unit 13 receives the service result in response to the transmission of the service request. The reception here is usually reception from the core server 3. However, the terminal reception unit 13 may receive the service result from the service server 2. Further, the terminal receiving unit 13 receives the service result while enjoying the service. For example, a TV phone (TV conference) service continues to receive video, audio, and the like from the other party during the conference. The terminal receiving unit 13 is usually realized by a wireless or wired communication means, but may be realized by a means for receiving a broadcast.

  The terminal output unit 14 outputs the result of the service received by the terminal receiving unit 13. Output here refers to display on a display, projection using a projector, printing to a printer, sound output, transmission to an external device, storage in a recording medium, and output to other processing devices or other programs. It is a concept that includes delivery of processing results. Further, the terminal output unit 14 may be considered to include or not include an output device such as a display or a speaker. The terminal output unit 14 can be implemented by output device driver software, or output device driver software and an output device.

  The processing means storage unit 21 constituting the service server 2 can store one or more processing means for performing the service. Here, the processing means is usually a program or software for realizing a service, but may be hardware for realizing a service. Note that the programs and software are usually executable programs and software.

  The processing means storage unit 21 is preferably a non-volatile recording medium, but can also be realized by a volatile recording medium. The process in which a processing means is memorize | stored in the processing means storage part 21 is not ask | required. For example, processing means may be stored in the processing means storage unit 21 via a recording medium, and processing means transmitted via a communication line or the like is stored in the processing means storage unit 21. Alternatively, the processing means input via the input device may be stored in the processing means storage unit 21.

  The service server receiving unit 22 receives a service request from the core server 3. The service server receiving unit 22 also receives a stop command, a copy command, a delete command, and the like from the core server 3. The service server receiving unit 22 is usually realized by a wireless or wired communication means, but may be realized by a means for receiving a broadcast.

  The service unit 23 executes the processing unit of the processing unit storage unit 21 according to the service request received by the service server reception unit 22, performs the service, and acquires the service result. The service unit 23 normally reads out the processing unit corresponding to the service identifier included in the service request from the processing unit storage unit 21 and executes the read out processing unit.

  Further, when the service server receiving unit 22 receives the stop command, the service unit 23 stops the execution of the processing unit corresponding to the service identifier included in the stop command. Note that the service unit 23 may continue to execute the service by executing the processing unit until a stop command is received by the processing unit. The service unit 23 can usually be realized by an MPU, a memory, or the like. The processing procedure of the service unit 23 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The service server transmission unit 24 transmits the service result of the service unit 23. The service server transmission unit 24 normally transmits the service result to the core server 3. However, the service server transmission unit 24 may transmit the service request to the terminal device 1 that has transmitted the service request. The service server transmission unit 24 is usually realized by wireless or wired communication means, but may be realized by broadcasting means.

  The processing unit storage unit 25 stores the processing unit included in the copy instruction in the processing unit storage unit 21. The processing means storage unit 25 can usually be realized by an MPU, a memory, or the like. The processing procedure of the processing means storage unit 25 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The processing means deletion unit 26 deletes the processing means of the service identified by the service identifier included in the deletion instruction from the processing means storage unit 21. The processing means deleting unit 26 can usually be realized by an MPU, a memory, or the like. The processing procedure of the processing means deleting unit 26 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The user information storage unit 301 constituting the core server 3 can store user information having a user identifier. User information is information for managing users. The user information includes, for example, a user identifier, a password, a name, a nationality, a recent core server identifier that identifies the nearest core server 3, and a recent service server identifier that identifies the nearest service server 2.

  The user information storage unit 301 is preferably a non-volatile recording medium, but can also be realized by a volatile recording medium. The process in which user information is stored in the user information storage unit 301 does not matter. For example, user information may be stored in the user information storage unit 301 via a recording medium, and user information transmitted via a communication line or the like is stored in the user information storage unit 301. Alternatively, user information input via the input device may be stored in the user information storage unit 301.

  The service constraint information storage unit 302 can store one or more service constraint information. The service restriction information is information indicating service restrictions. The constraint information is usually information indicating a service provision policy, but any constraint may be used as long as it should be satisfied when providing the service. The service constraint information includes a service identifier for identifying a service and constraint information that is information related to the service constraint. The constraint information is, for example, the number of licenses of the processing means that performs the service, the time zone during which the service can be operated, the number of activations and the operation time in a unit time (for example, one month). The number of licenses may be the number that can be activated simultaneously or the number that can be installed simultaneously. The service constraint information storage unit 302 is preferably a non-volatile recording medium, but can also be realized by a volatile recording medium. The process in which the service constraint information is stored in the service constraint information storage unit 302 does not matter.

  The history information storage unit 303 can store one or more history information. The history information is information indicating the past usage status of the service for each user or for each user group including two or more users. Here, the user group is, for example, a group of users grouped for each country or a certain area. The history information includes information such as a user identifier, a service identifier, a use time, and a use time, for example.

  The history information storage unit 303 is preferably a non-volatile recording medium, but can also be realized by a volatile recording medium. The process in which history information is stored in the history information storage unit 303 does not matter. However, the history information in the history information storage unit 303 is usually information accumulated by the history information accumulation unit 307.

  The reservation information storage unit 304 can store reservation information. The reservation information is information indicating a service use schedule for each user or each user group. The reservation information includes, for example, information such as a user identifier, a service identifier, and a usage time zone. The reservation information storage unit 304 is preferably a nonvolatile recording medium, but can also be realized by a volatile recording medium. The process in which the reservation information is stored in the reservation information storage unit 304 does not matter. However, the reservation information in the reservation information storage unit 304 is usually information stored by the reservation information storage unit 308.

  The core server receiving unit 305 receives a service request from the terminal device 1. The core server receiving unit 305 may receive a user identifier and a password from the terminal device 1. Further, the core server receiving unit 305 may receive reservation information from the terminal device 1. The core server reception unit 305 may receive the service result from the service server 2. Further, the core server receiving unit 305 may receive other instructions and data from the terminal device 1. The core server receiving unit 305 is usually realized by a wireless or wired communication means, but may be realized by a means for receiving a broadcast.

  The history information acquisition unit 306 configures history information using the service request received by the core server reception unit 305. For example, the history information acquisition unit 306 acquires the user identifier and the service identifier from the service request received by the core server reception unit 305, and acquires the time from a clock (not shown). Then, the history information acquisition unit 306 measures the time until the service provided by the service identifier ends. Then, the history information acquisition unit 306 acquires history information having (user identifier, service identifier, time, time). The history information acquisition unit 306 can usually be realized by an MPU, a memory, or the like. The processing procedure of the history information acquisition unit 306 is usually realized by software, and the software is recorded in a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The history information accumulation unit 307 accumulates the history information acquired by the history information acquisition unit 306 in the history information storage unit 303. The history information storage unit 307 can usually be realized by an MPU, a memory, or the like. The processing procedure of the history information storage unit 307 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The reservation information accumulation unit 308 accumulates the reservation information received by the core server reception unit 305 in the reservation information storage unit 304. The reservation information storage unit 308 can usually be realized by an MPU, a memory, or the like. The processing procedure of the reservation information storage unit 308 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The service server determination unit 309 determines one or more service servers 2 that perform a service corresponding to the service request. More specifically, the service server determination unit 309 acquires the constraint information that is paired with the service identifier included in the service request, and satisfies the constraint information and improves the overall response performance. The service server 2 that performs the service corresponding to the request is determined. Note that “so that the overall response performance is improved” means that the overall response performance is improved when a plurality of terminal devices 1 use a service (for example, the sum of response times of all the terminal devices 1). Etc.). In addition, the service server determination unit 309 acquires constraint information that is paired with a service identifier included in the service request, satisfies the constraint information, and uses one or more information of history information and reservation information. The service server 2 that performs the service corresponding to the service request is determined so that the overall response performance is improved. In addition, the service server determination unit 309 acquires two or more pieces of constraint information paired with two or more service identifiers that identify two or more services constituting the composite service identified by the composite service identifier included in the service request. Then, the service server 2 that performs the service corresponding to the service request is determined so as to satisfy all the two or more pieces of constraint information. Furthermore, the service server determination unit 309 includes two or more pieces of constraint information paired with two or more service identifiers that identify each of two or more services constituting the composite service identified by the composite service identifier included in the service request, and One or more pieces of constraint information paired with the composite service identifier are acquired, and the service server 2 that performs the service corresponding to the service request is determined so as to satisfy all the three or more pieces of constraint information. Note that the process of determining the service server 2 so as to improve the overall response performance is, for example, a process of determining the terminal server 1 that uses the service at a high frequency and a high rate and the service server 2 that is close to the network. Further, the service server determination unit 309 acquires the constraint information from the service constraint information storage unit 302, and determines the service server 2 so as to match the acquired constraint information.

  The service server determination unit 309 can be usually realized by an MPU, a memory, or the like. The processing procedure of the service server determination unit 309 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The core server transmission unit 310 transmits a service request to the service server 2 determined by the service server determination unit 309.

Further, when changing the service server 2 that performs one service, the core server transmission unit 310 may use any one of the following two methods.
(1) Static processing means management method The static processing means management method is a method in which processing means for performing a service is stored in all service servers 2 that may provide the service. Then, when changing the service server 2 that performs one service, the core server transmission unit 310 indicates to the first service server 2 that previously performed the one service that the service is stopped. A stop command is transmitted, and a service request is transmitted to the second service server 2 that the service server determination unit 309 has determined to perform a new service.
(2) Dynamic processing means management method In the dynamic processing means management method, it is not necessary to store processing means for performing a service in advance in all service servers 2 that may provide the service. It is a method to obtain before performing. Then, when changing the service server 2 that performs one service, the core server transmission unit 310 indicates to the first service server 2 that previously performed the one service that the service is stopped. A stop command, a copy command for instructing copying of processing means corresponding to one service for the second service server 2 determined to be newly performed by the service server determination unit 309, and a process corresponding to the one service A delete command instructing deletion of the means is transmitted, and a service request for starting the processing means copied according to the copy command is transmitted to the second service server 2. Here, the copy command usually has a service identifier for identifying the processing means of the service to be copied, and processing means. Further, the deletion instruction usually has a service identifier for identifying the processing means to be deleted.

  In addition, the core server transmission unit 310 transmits the result of the service received by the core server reception unit 305 to the terminal device 1 that transmitted the service request. Furthermore, the core server transmission unit 310 may transmit the authentication result to the terminal device 1.

  The core server transmission unit 310 is usually realized by a wireless or wired communication unit, but may be realized by a broadcasting unit.

  The dynamic history information acquisition unit 311 determines the first service server 2 on which the service server determination unit 309 performs one service, and the core server transmission unit 310 transmits a service request to the first service server 2. Then, the dynamic history information, which is information indicating the usage status of the service, is acquired during the execution of the service in the first service server 2. The dynamic history information acquisition unit 311 can usually be realized by an MPU, a memory, or the like. The processing procedure of the dynamic history information acquisition unit 311 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

The dynamic service server changing unit 312 acquires the constraint information that is paired with the service identifier included in the service request, the dynamic history information acquired by the dynamic history information acquisition unit 311 so as to satisfy the constraint information. The second service server 2 that performs the service corresponding to the service request is determined so that the overall response performance is improved, and the second service server 2 has performed the service first. When different from the first service server 2, a stop command indicating that the service is to be stopped is transmitted to the first service server 2, and a service request is transmitted to the second service server 2. Here, the dynamic service server changing unit 312 may determine the second service server 2 using one or more pieces of history information and reservation information in addition to the dynamic history information. In addition, when the second service server 2 is different from the first service server 2 that has previously performed the service, a stop command indicating that the service is to be stopped is transmitted to the first service server 2 Then, a service request is transmitted to the second service server 2. The stop instruction here usually has a service identifier. In addition, the dynamic service server changing unit 312 performs a service update on the first service server 2 when the second service server 2 is different from the first service server 2 that has previously performed the service. A stop command and a delete command are transmitted, a service copy command is transmitted to the second service server 2, and a service request is transmitted. Note that the stop command, delete command, copy command, and service request here have the same service identifier. The dynamic service server changing unit 312 can usually be realized by an MPU, a memory, or the like. The processing procedure of the dynamic service server changing unit 312 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).
Next, the operation of the information system will be described. First, operation | movement of the terminal device 1 which comprises an information system is demonstrated using the flowchart of FIG.

  (Step S301) The terminal reception unit 11 determines whether an instruction or the like has been received from the user. If an instruction or the like is accepted, the process proceeds to step S302. If an instruction or the like is not accepted, the process proceeds to step S307.

  (Step S302) The terminal transmission unit 12 determines whether or not the instruction received in Step S301 is a user identifier for login or the like. If it is a user identifier or the like, go to step S303, and if it is not a user identifier or the like, go to step S304.

  (Step S303) The terminal transmission unit 12 transmits the user identifier or the like received in Step S301 to the core server 3, and returns to Step S301.

  (Step S304) The terminal transmission unit 12 determines whether or not the instruction received in Step S301 is a service request. If it is a service request, go to step S305, and if it is not a service request, go to step S306.

  (Step S305) The terminal transmission unit 12 transmits the service request received in Step S301 to the core server 3, and returns to Step S301. It is preferable that the terminal transmission unit 12 adds the stored user identifier to the service request received in step S301 and transmits the service request to which the user identifier is added to the core server 3.

  (Step S306) The terminal transmitter 12 or processing means (not shown) performs processing corresponding to the other instructions and data received in Step S301, and returns to Step S301. When the terminal receiving unit 11 receives the reservation information in step S301, the terminal transmitting unit 12 transmits the reservation information to the core server 3. In addition, when the terminal reception unit 11 receives information to be passed to the processing unit in step S301 (for example, video, audio, subtitles, etc. in a TV conference), the terminal transmission unit 12 sends the information to be passed to the processing unit to the core server 3. Alternatively, it is transmitted to the service server 2.

  (Step S <b> 307) The terminal reception unit 13 determines whether or not the authentication result “authentication permission” has been received from the core server 3. If “authentication permission” is received, the process goes to step S308; otherwise, the process goes to step S309.

  (Step S308) The terminal reception unit 13 temporarily stores a user identifier. Normally, the user identifier is held in the terminal device 1 until logging out.

  (Step S309) The terminal reception unit 13 determines whether a service result has been received. If the service result is received, the process goes to step S310; otherwise, the process returns to step S301.

  (Step S310) The terminal output unit 14 outputs the result of the service received in Step S309, and returns to Step S301.

  In the flowchart of FIG. 3, when the user inputs a service stop instruction, a stop command having a service identifier is transmitted to the core server 3.

  Further, in the flowchart of FIG. 3, the process is ended by powering off or interruption for aborting the process.

  Next, operation | movement of the service server 2 is demonstrated using the flowchart of FIG.

  (Step S <b> 401) The service server reception unit 22 determines whether a service request is received from the core server 3. If the service request is received, the process goes to step S402, and if the service request is not received, the process goes to step S406.

  (Step S402) The service unit 23 acquires a service identifier included in the service request received in step S401.

  (Step S403) The service unit 23 reads the processing unit corresponding to the service identifier acquired in step S402 from the processing unit storage unit 21, and executes the read processing unit.

  (Step S404) The service server transmission unit 24 acquires the service result of the service unit 23 in step S403.

  (Step S405) The service server transmission unit 24 transmits the result of the service acquired in step S404, and returns to step S401.

  (Step S <b> 406) The service server reception unit 22 determines whether a stop command has been received from the core server 3. If a stop command is received, the process goes to step S407, and if a stop command is not received, the process goes to step S409.

  (Step S407) The service unit 23 acquires a service identifier included in the stop command received in Step S406.

  (Step S408) The service unit 23 stops the execution of the processing means corresponding to the service identifier acquired in Step S407, and returns to Step S401.

  (Step S409) The service server receiving unit 22 determines whether a copy command has been received from the core server 3. If a copy command is received, the process goes to step S410, and if no copy command is received, the process goes to step S412.

  (Step S410) The processing means accumulating unit 25 acquires the processing means and service identifier included in the copy command received in step S409.

  (Step S411) The processing means accumulating unit 25 accumulates the processing means and service identifier acquired in Step S410 in the processing means storage unit 21, and returns to Step S401.

  (Step S412) The service server reception unit 22 determines whether or not a deletion command has been received from the core server 3. If a delete command is received, the process proceeds to step S413, and if no delete command is received, the process returns to step S401.

  (Step S413) The processing means deletion unit 26 acquires a service identifier included in the deletion instruction received in step S409.

  (Step S414) The processing means deletion unit 26 deletes the processing means corresponding to the service identifier acquired in step S413 from the processing means storage unit 21, and returns to step S401.

  In the flowchart of FIG. 4, after receiving the service request, the processing means corresponding to the service identifier included in the service request may be continuously executed until a stop command is received. Then, acquisition and transmission of service results may be repeated.

  In the flowchart of FIG. 4, the process is terminated by power-off or a process termination interrupt.

  Next, the operation of the core server 3 will be described using the flowchart of FIG.

  (Step S501) The core server receiving unit 305 determines whether or not a user identifier or password for user authentication has been received from the terminal device 1. If a user identifier or the like is received, the process goes to step S502. If not received, the process goes to step S504.

  (Step S502) An authentication unit (not shown) performs an authentication process using the user identifier received in step S501. The authentication process is usually performed using user information stored in the user information storage unit 301. Since the authentication process is a known technique, detailed description thereof is omitted.

  (Step S503) The core server transmission unit 310 transmits the authentication result in step S502 to the terminal device 1, and returns to step S501. The authentication result is, for example, “authentication permitted” or “authentication not permitted”.

  (Step S504) The core server reception unit 305 determines whether a service request is received from the terminal device 1. If a service request is received, the process goes to step S505, and if no service request is received, the process goes to step S512.

  (Step S505) The service server determination unit 309 acquires a service identifier included in the service request received in step S504.

  (Step S506) The service server determination unit 309 determines a service server using the service identifier acquired in step S505. Such service server determination processing will be described with reference to the flowchart of FIG.

  (Step S507) The core server transmission unit 310 transmits the service request received in step S504 to the one or more service servers 2 determined in step S506. Alternatively, the core server transmission unit 310 transmits a service request including information passed to the service server 2.

  (Step S508) The core server reception unit 305 determines whether or not a service result has been received from one or more service servers 2 that have transmitted a service request in step S507. If the service result is received, the process goes to step S509, and if not received, the process returns to step S508. Note that when the time during which the service result is not received exceeds a predetermined time, the terminal device 1 may be notified of an error or may return to step S501 as a timeout.

  (Step S509) The core server transmission unit 310 transmits the service result received in step S508 to the terminal device 1 that has transmitted the service request, and returns to step S501.

  (Step S <b> 510) The core server reception unit 305 determines whether reservation information has been received from the terminal device 1. If the reservation information is received, the process goes to step S511. If the reservation information is not received, the process goes to step S512.

  (Step S511) The reservation information storage unit 308 stores the reservation information received in step S510 in the reservation information storage unit 304. The process returns to step S501.

  (Step S512) The core server reception unit 305 determines whether or not the information to be passed to the service server 2 is received from the terminal device 1. If information etc. are received, it will go to step S507, and if not received, it will go to step S513.

  (Step S513) The core server reception unit 305 determines whether or not a stop instruction is received from the terminal device 1. The stop instruction is a service stop instruction. If a stop instruction is received, the process proceeds to step S514. If a stop instruction is not received, the process returns to step S501.

  (Step S514) The core server transmission unit 310 transmits a stop command corresponding to the stop instruction to the corresponding service server 2. The stop command has a service identifier.

  (Step S515) The history information acquisition unit 306 acquires history information including a user identifier, a service identifier, a service start time, a service provision time, and the like. The service start time is, for example, the time when the service request is received in step S504. Also, the service provision time is the time during which the same service has been provided continuously from the service start time. The history information acquisition unit 306 acquires such time.

  (Step S516) The history information accumulation unit 307 accumulates the history information acquired in step S515 in the history information storage unit 303, and returns to step S501.

  In the flowchart of FIG. 5, the process ends when the power is turned off or the process ends.

  Next, the service server determination process in step S506 will be described with reference to the flowchart of FIG.

  (Step S601) The service server determination unit 309 substitutes 1 for a counter i.

  (Step S602) The service server determination unit 309 determines whether there is an i-th service server 2 that can provide the service identified by the service identifier. If it exists, go to step S603, otherwise go to step S608.

  (Step S603) The service server determination unit 309 stores history information of one or more users (this is called a user group) close to the i-th service server 2 that can provide the service identified by the service identifier. Read from the unit 303.

  (Step S604) The service server determination unit 309 reads from the reservation information storage unit 304 reservation information of a user group close to the i-th service server 2 that can provide the service identified by the service identifier.

  (Step S605) The service server determination unit 309 calculates the predicted load value of the user group by using one or more information of the history information acquired in step S603 and the reservation information acquired in step S604. The predicted load value is a predicted load value when a service identified by a service identifier is provided. The predicted load value increases as the frequency of users in the user group using the service in the past increases, and increases as the number of users who plan to use the service increases. The degree of use of each user who plans to use the service increases The bigger it is, the bigger it becomes. The usage degree may be anything as long as it uses information about parameters such as the number of activations and usage time.

  (Step S606) The service server determination unit 309 associates the predicted load value calculated in Step S605 with information for identifying the i-th service server 2 (for example, i, the IP address of the server, the server ID, etc.) Temporarily accumulates in a buffer (not shown).

  (Step S607) The service server determination unit 309 increments the counter i by 1. The process returns to step S602.

  (Step S608) The service server determination unit 309 reads out the constraint information corresponding to the service identifier from the service constraint information storage unit 302.

  (Step S609) The service server determination unit 309 uses the load predicted values of two or more service servers 2 in the buffer temporarily stored in step S606 so as to match the constraints indicated by the constraint information read in step S608. One or more service servers 2 are selected. Here, selection means obtaining information for identifying the service server 2 (for example, i, server IP address, server ID, etc.). Return to upper process. If the constraint indicated by the constraint information is “number of licenses = 1”, the service server determination unit 309 determines the service server 2 that provides the service as the service server 2 having the largest load prediction value. When the constraint indicated by the constraint information is “number of licenses = 2”, the service server determination unit 309 determines that the two service servers 2 that provide the service have the service server 2 with the largest predicted load value and the predicted load value. The service server 2 is determined to be the second highest.

  Although not described in the flowchart of FIG. 6, the dynamic history information acquisition unit 311 determines the first service server 2 on which the service server determination unit 309 performs one service, and the core server transmission unit 310. It is preferable to transmit a service request to the first service server 2 and acquire dynamic history information, which is information indicating the usage status of the service, while the first service server 2 performs the service. is there. Then, the dynamic service server changing unit 312 performs a service corresponding to the service request so that the overall response performance is improved in accordance with the usage status of the dynamic service indicated by the dynamic history information. The service server 2 is determined, and when the second service server 2 is different from the first service server 2 that has previously performed the service, the service is stopped for the first service server 2 It is preferable to transmit a stop command indicating that the service request is transmitted to the second service server 2.

  Hereinafter, a specific operation of the information system in the present embodiment will be described.

  Now, the user information storage unit 301 of the core server 3 holds the user information management table shown in FIG. The user information management table manages one or more pieces of user information having “ID”, “user identifier”, “nearest service server ID”, “nearest core server ID”, and “PW” as attribute values. “ID” is information for identifying user information. “User identifier” is information for identifying a user. The “nearest service server ID” is information for identifying the service server 2 that is closest to the user terminal device 1 (it is considered that communication delay is the smallest even through the network). The “nearest core server ID” is information for identifying the core server 3 that is closest to the user's terminal device 1 (it is considered that the communication delay is the smallest even through the network). The nearest service server ID and the nearest core server ID are the names of the devices here, but may be information such as the IP address or URL of the device. Although not shown here, it is assumed that information such as an IP address and URL for communicating with the device is managed in association with the name of the device. “PW” is a password. The core server 3 performs user authentication using the user identifier and PW.

  FIG. 8 is a service constraint information management table stored in the service constraint information storage unit 302. The service constraint information management table manages one or more records having “ID”, “service identifier”, and “constraint information”. Here, the “constraint information” includes “simultaneous activation number” and “simultaneous installation number”. The “simultaneous activation number” is the number of services (processing means) that can be activated simultaneously. The “number of simultaneous installations” is the number of services (processing means) that can be installed simultaneously. “Number of simultaneous activations” and “number of simultaneous installations” are examples of license policies.

  FIG. 9 is a history information management table stored in the history information storage unit 303. The history information management table manages one or more records having attribute values of “ID”, “user identifier”, “service identifier”, “use start time”, “use end time”, and “use time”. The history information in the history information management table is information acquired by the history information acquisition unit 306 and stored by the history information storage unit 307 by the above-described processing. In FIG. 9, it is assumed that “use start time” and “use end time” are corrected and stored in the time of one country so that the time difference of each country is not affected. That is, the history information storage unit 307 uses the service identified by the user identified by the user identifier using information on the time difference between the location where the user (terminal device 1) arbitrarily identified by the user identifier exists and the reference area. Correct the time. It is assumed that the information on the time difference between the place where the user exists and the reference area is held in, for example, the user information management table in FIG. 7 or a time difference management table (not shown). When the time difference information is managed in the user information management table of FIG. 7, the time difference information is managed for each user, for example. When the time difference information is managed by a time difference management table (not shown), the time difference information is managed for each nearest service server ID or nearest core server ID, for example.

  FIG. 10 is a reservation information management table stored in the reservation information storage unit 304. The reservation information management table manages one or more records having attribute values of “ID”, “user identifier”, “service identifier”, “use start time”, and “use end time”. The reservation information in the reservation information management table is information received by the core server receiving unit 305 from the terminal device 1 of each user and stored by the reservation information storage unit 308. Further, in FIG. 10, it is assumed that “use start time” and “use end time” are corrected and stored in the time of one country so that the time difference of each country does not affect. That is, the reservation information storage unit 308 uses the information on the time difference between the location where the user (terminal device 1) identified by the user identifier exists and the reference area to start the service reserved by the user identified by the user identifier. Correct the time and end time.

  FIG. 11 is a composite service management table managed by the service server determination unit 309 using composite service storage means (not shown). The composite service management table has one or more composite service definition information. The composite service definition information is information that defines a composite service including one or more atomic services. The composite service definition information has a composite service ID and two or more atomic service IDs. In FIG. 11, the composite service “TV conference with language translation” is composed of an atomic service “video service” and “caption translation service”. The “moving image service” is a service that transmits a received moving image to one or more terminal devices 1 to be distributed. In addition, the “caption translation service” is a service that translates subtitles associated with a received video into a language desired by a user of one or more terminal devices 1 to be distributed. It is assumed that the language desired by the user is transmitted from the terminal device 1 to the core server 3 before starting the service (for example, at the time of calling). Such a language is included in the service request, for example.

Further, it is assumed that the current date is June 20, 2010. In such a situation, a process for determining the service server 2 that provides a service will be described based on the following three specific examples.
(Specific example 1)

  Specific example 1 is a case in which service server 2 that provides a service is determined based on history information.

  Then, it is assumed that at 9:00, the user B tries to use a service identified by the service identifier “English-Japanese translation service”. That is, it is assumed that the user B inputs the user identifier “user B” and the password “pwB” to his / her terminal device 1 and tries to log in to the core server 3 nearest to the terminal device 1. Then, the terminal transmission unit 12 of the terminal device 1 accepts a login command having the user identifier “user B” and the password “pwB”.

  Next, the terminal transmission unit 12 transmits the received user identifier “user B” and password “pwB” to the core server 3.

  Next, the core server receiving unit 305 of the core server 3 receives the user identifier “user B” and the password “pwB” for user authentication from the terminal device 1. The authentication unit (not shown) of the core server 3 performs an authentication process using the received user identifier “user B” and password “pwB”, and transmits an authentication result “authentication permission” to the terminal device 1 of the user B. .

Next, the user B inputs a service request including the service identifier “English-Japanese translation service” to the terminal device 1.
Next, the terminal reception unit 11 receives a service request including a service identifier “English-Japanese translation service”. Then, the terminal transmission unit 12 transmits a service request including the service identifier “English-Japanese translation service” to the core server 3.

  Next, the core server receiving unit 305 of the core server 3 receives a service request including the service identifier “English-Japanese translation service” from the terminal device 1.

  Next, the service server determination unit 309 acquires the service identifier “English-Japanese translation service” included in the received service request.

  The service server determination unit 309 is one or more existing for each service server 2 that can provide the service identified by the service identifier (the service server 2 is nearest). The user's usage record of the service is acquired from the history information management table of FIG. Here, the usage record is the total of service usage times of one or more users who are affiliated with each service server 2. The usage record of “English-Japanese translation service” in the US service server is, for example, 23 hours, and the usage record of “English-Japanese translation service” in the Japanese service server is, for example, 258 hours, “English-Japanese translation service” in the French service server The usage record of “service” is, for example, 0 hour, and the usage record of “English-Japanese translation service” in the Dutch service server is, for example, 2 hours. Then, the service server determination unit 309 temporarily stores the acquired time in a buffer (not shown) in association with information (for example, IP address, server ID, etc.) for identifying each service server 2. Here, it is assumed that the usage record time is the load predicted value described above.

  Next, the service server determination unit 309 reads the constraint information “number of simultaneous installations = 1” corresponding to the service identifier “English-Japanese translation service” from the service constraint information management table of FIG.

  It is assumed that the processing means (for example, program) identified by the service identifier “English-Japanese translation service” currently exists in the Dutch service server, for example. This is because the service server 2 using the service identified by the service identifier “English-Japanese translation service” was the Dutch service server immediately before.

  Next, the service server determination unit 309 uses the estimated load (time) of two or more service servers 2 in the temporarily accumulated buffer to satisfy the constraint information “number of simultaneous installations = 1”. The service server 2 that performs the “English-Japanese translation service” is determined as the Japan service server having the largest.

  Next, the service server determination unit 309 transmits a delete command having the service identifier “English-Japanese translation service” to the Dutch service server. In addition, the service server determination unit 309 transmits a copy command having a service identifier “English-Japanese translation service” and processing means for the service to the Japanese service server. The core server 3 preferably stores each processing unit in advance. However, the core server 3 may receive and store the processing means from the Dutch service server before the Dutch service server deletes the processing means corresponding to the service identifier “English-Japanese translation service”.

  Next, the service server receiving unit 22 of the Dutch service server receives a delete command having the service identifier “English-Japanese translation service”. Then, the processing means deletion unit 26 acquires the service identifier “English-Japanese translation service” included in the received deletion instruction.

  Then, the processing unit deletion unit 26 deletes the processing unit corresponding to the acquired service identifier “English-Japanese translation service” from the processing unit storage unit 21.

  Further, the service server receiving unit 22 of the Japanese service server receives a service identifier “English-Japanese translation service” and a copy command having processing means for the service.

  Next, the processing means storage unit 25 acquires the processing means and the service identifier “English-Japanese translation service” included in the received copy command. Then, the processing unit storage unit 25 stores the acquired processing unit and the service identifier “English-Japanese translation service” in the processing unit storage unit 21.

  Next, the core server transmission unit 310 transmits a service request having the service identifier “English-Japanese translation service” to the determined Japanese service server 2.

  Next, the service server receiving unit 22 of the Japanese service server receives a service request having the service identifier “English-Japanese translation service” from the core server 3.

  Next, the service unit 23 acquires the service identifier “English-Japanese translation service” included in the received service request. Then, the service unit 23 reads the processing unit corresponding to the acquired service identifier “English-Japanese translation service” from the processing unit storage unit 21 and executes the read processing unit.

  Thereafter, the service unit 23 passes the English sentence received from the Japanese core server to the processing means identified by the service identifier “English-Japanese translation service”, and acquires the translated Japanese sentence.

  Then, the service server transmission unit 24 acquires the service result (Japanese sentence) of the service unit 23. Next, the service server transmission unit 24 transmits the acquired service result (Japanese sentence) to the Japan core server.

  Next, the Japan core server receives the service result (Japanese sentence) and transfers the result to the terminal device 1 of the user B.

  It is assumed that the English-Japanese translation process is continued for the sentence that the user B inputs to the terminal device 1 until the user B inputs a service stop command.

  Then, the history information acquisition unit 306 includes a user identifier “user B”, a service identifier “English-Japanese translation service”, a service start time “2010/6/20 9:00:00”, and a service provision time “25 minutes”. To obtain history information.

Next, the history information accumulation unit 307 accumulates the acquired history information in the history information management table of FIG.
(Specific example 2)

  Specific example 2 is a case where a service server that provides a service is determined based on reservation information and history information.

  It is assumed that it is 10:25 now. Then, it is assumed that a user inputs a service request including a service identifier “TV phone with language translation” to his terminal device 1.

  And the terminal reception part 11 of the user's terminal device 1 receives the service request containing service identifier "TV phone with language translation". Next, the terminal transmission unit 12 transmits the service request to the core server 3.

  Next, the core server receiving unit 305 of the core server 3 receives the service request including the service identifier “TV phone with language translation”. Then, the service server determination unit 309 acquires the service identifier “TV phone with language translation” included in the received service request.

  Next, the service server determination unit 309 determines a service server using the acquired service identifier “TV phone with language translation”. That is, first, the service server determination unit 309 is reservation information for using the service identified by the service identifier “TV phone with language translation”, and is within a threshold (for example, 30 minutes) from the current time (10:25). It is determined whether or not the reservation information whose start time is within the reservation information management table of FIG.

  Here, with reference to the reservation information management table of FIG. 10, the service server determination unit 309 identifies the service identified by the user A with the service identifier “TV phone with language translation” as “2010/6/20 10:30. To “2010/6/20 11:30” is detected. Then, the service server determination unit 309 obtains the usage time “60 minutes” of the user A. In addition, the service server determination unit 309 changes the service identified by the user E by the service identifier “TV phone with language translation” from “2010/6/20 10:30 to“ 2010/6/20 11:30: "00" is detected. Then, it is assumed that the service server determination unit 309 obtains the usage time “60 minutes” of the user E.

  Next, the service server determination unit 309 acquires the nearest service server ID “American service server” corresponding to the user A. Then, the service server determination unit 309 adds the point “60” to the “American service server”. Note that the point calculation method is determined in advance. The point calculation method here is, for example, “point = scheduled usage time (minutes) indicated by the reservation information + cumulative usage time (minutes) / 100”. Note that the point formula is preferably an increasing function using the scheduled use time indicated by the reservation information as a parameter, and an increasing function using the accumulated usage time as a parameter.

  Next, the service server determination unit 309 acquires a nearest service server ID “Netherlands service server” corresponding to the user E. Then, the service server determining unit 309 adds the point “60” to the “Netherlands service server”.

  Next, the service server determination unit 309 selects the atomic service identifier “video service” or “caption translation service” paired with the composite service identifier from the composite service identifier “TV phone with language translation”. Acquired from the composite service management table.

  Then, the service server determination unit 309 acquires the time when each user uses the service identified by the “video service” or “caption translation service” from the history information management table of FIG. 9. Then, “time / 100 (minutes)” acquired for each user is calculated.

  Next, the service server determination unit 309 calculates points based on the usage time acquired for each user for each nearest service server ID of each user.

  Here, the point of “Japan Service Server” is “60 + 23 = 83 points”, the point of “Netherlands Service Server” is “60 + 7 = 67 points”, the point of “American Service Server” is “0 + 28 = 28 points”, etc. Let's say. The largest point is “Japan Service Server”.

  Then, the service server determination unit 309 determines the service server 2 identified by the “Japan service server” having the largest point as a server that performs “TV phone with language translation”.

  Next, the core server transmission unit 310 makes the atomic service identifier “video service” paired with the composite service identifier “TV phone with language translation” for the service server 2 identified by the determined “Japan service server”. And a service request including “caption translation service” is transmitted.

  Next, the service server receiving unit 22 of the service server 2 receives a service request including “moving image service” and “caption translation service” from the core server 3. Then, the service unit 23 reads the processing means corresponding to the service identifiers “video service” and “caption translation service” from the processing means storage unit 21 and executes them.

  Thereafter, the video and character strings (captions) received by the terminal device 1 are transmitted via the core server 3 to the service server 2 identified by the “Japan service server”, and the service server 2 executes the video service and the caption translation service. Then, the execution result is transmitted to the appropriate terminal device 1 via the core server 3. The above processing is repeated until the user A or the user E inputs a stop instruction, thereby realizing a language-translated videophone. Since the processing of the TV phone with language translation is a known technique, detailed description thereof is omitted.

  Then, the history information acquisition unit 306 includes a user identifier “user A”, a service identifier “video service”, a service start time “2010/6/20 10:30”, a service provision time “60 minutes”, and the like. Acquire history information. The history information acquisition unit 306 also includes a user identifier “user A”, a service identifier “caption translation service”, a service start time “2010/6/20 10:30”, a service provision time “60 minutes”, and the like. To obtain history information. In addition, the history information acquisition unit 306 includes a user identifier “user E”, a service identifier “video service”, a service start time “2010/6/20 10:30”, a service provision time “60 minutes”, and the like. Acquire history information. The history information acquisition unit 306 also includes a user identifier “user E”, a service identifier “caption translation service”, a service start time “2010/6/20 10:30”, a service provision time “60 minutes”, and the like. To obtain history information.

Next, the history information storage unit 307 stores the acquired four history information in the history information management table of FIG. From the above, the history information management table of FIG. 12 is obtained.
(Specific example 3)

  Specific example 3 is a case where the service server is dynamically made current during startup. For example, it is assumed that the dynamic service server changing unit 312 holds one or more pieces of dynamic service server change condition information having “service identifier” and “change condition”. Here, the dynamic service server changing unit 312 stores dynamic service server change condition information having a service identifier “video service” and a change condition “a situation where a large number of users have continued for 5 minutes or more”. And The dynamic service server changing unit 312 also stores dynamic service server change condition information having a service identifier “Japanese-English translation service” and a change condition “service usage rate exceeds 50%”. And The change condition is a condition for changing the service server. The change condition has information on service usage and duration. The change condition may be only a temporary service usage status.

  It is assumed that the processing means identified by the service identifier “moving image service” is currently activated by the American service server and that user A is using the service. Further, it is assumed that only one user under the umbrella of the US service server is using. Then, 5 minutes have passed since two users under the umbrella of the Japanese service server started using the service identified by the service identifier “video service” activated on the US service server. To do. Then, the dynamic history information acquisition unit 311 determines that the service server determination unit 309 performs service “video service” as the US service server, and the core server transmission unit 310 transmits “video” to the US service server. A service request for “service” is transmitted, and dynamic history information, which is information indicating the usage status of the service, is acquired while the service is being executed in the US service server. Here, the dynamic history information is that one user (only user A) who is affiliated with the US service server has started using it for 15 minutes, and one user (eg, user B) who is affiliated with the Japan service server. However, 10 minutes have elapsed since the start of use, and another user (for example, user X) under the umbrella of the Japan service server has been informed that 5 minutes have passed since the start of use. .

  Then, the dynamic service server changing unit 312 determines that the above-described dynamic history information satisfies that the Japanese service server satisfies the change condition “a situation where a large number of users have continued for 5 minutes or more”.

  Next, the dynamic service server changing unit 312 determines that the service server 2 that activates the processing means identified by the service identifier “moving image service” is changed from the US service server to the Japan service server. Then, the dynamic service server changing unit 312 reads the constraint information “number of simultaneous activations = 1” corresponding to the service identifier “moving image service” from the service constraint information management table of FIG. Then, the dynamic service server changing unit 312 transmits a stop command including the service identifier “moving image service” to the US service server. The dynamic service server changing unit 312 transmits a service request including the service identifier “moving image service” to the Japan service server.

  Then, the American service server receives a stop command including the service identifier “moving image service”, and stops the service identified by the service identifier “moving image service”.

  Also, the Japanese service server receives a service request including the service identifier “moving image service” and activates the processing means identified by the service identifier “moving image service”.

  Thereafter, the moving image service is provided to each terminal device using processing means existing in the Japan service server.

  As described above, according to the present embodiment, when a plurality of services are used in a large-scale network environment, the overall response performance is improved while satisfying a service provision policy such as a license restriction that varies depending on the service provider. The service server that provides the service can be determined.

  Further, according to the present embodiment, it is possible to determine with high accuracy a service server that provides a service so that the overall response performance is improved by using history information indicating the past usage status of the service.

  Further, according to the present embodiment, it is possible to determine a service server that provides a service with high accuracy so as to improve the overall response performance using reservation information indicating a service use schedule.

  In addition, according to the present embodiment, it is possible to change the service server that dynamically provides a service while grasping the usage status of the service while the service is being provided.

  Furthermore, according to the present embodiment, even when providing a composite service composed of a plurality of services, the overall response performance is improved while satisfying a service provision policy such as a license restriction that varies depending on the service provider. A service server that provides a service can be determined.

  In the present embodiment, the service result may be transmitted from the service server 2 to the terminal device 1 via the core server 3 or may be transmitted to the terminal device 1 without passing through the core server 3. good.

  In the present embodiment, the processing of the core server 3 may be performed by the terminal device 1. In this case, the service server control method stores, in a recording medium, one or more service constraint information having a service identifier for identifying a service and constraint information that is information regarding the constraint of the service, a core server reception unit, A service server control method realized by a service server determination unit and a core server transmission unit, wherein the core server reception unit receives a service request, a core server reception step, and the service server determination unit A service that acquires constraint information that is paired with an included service identifier and determines a service server that performs a service corresponding to the service request so as to satisfy the constraint information and improve overall response performance A server determination step, and the core server transmission unit includes the service server. The service server determined in server determining step is a service server control method comprising a core server transmission step of transmitting the service request. The reception in the core server reception step is a concept including reception, reception by manual input, reading from a recording medium, and the like.

  Furthermore, the processing in the present embodiment may be realized by software. Then, this software may be distributed by software download or the like. Further, this software may be recorded and distributed on a recording medium such as a CD-ROM. This also applies to other embodiments in this specification. In addition, the software which implement | achieves the core server 3 in this Embodiment is the following programs. That is, this program stores in a recording medium one or more service constraint information having a service identifier for identifying a service and constraint information that is information regarding the constraint of the service, and allows the computer to receive a service request. A service corresponding to the service request so as to obtain constraint information paired with a server reception unit and a service identifier included in the service request, satisfy the constraint information, and improve the overall response performance. A service server determination unit that determines a service server that performs the above, and a program for causing the service server determined by the service server determination unit to function as a core server transmission unit that transmits the service request.

  In the above program, the recording medium further stores history information, which is information indicating a past usage status of a service for each user or for each user group including two or more users, and the service server determination unit includes the service server Service information corresponding to the service request is acquired so as to obtain the constraint information paired with the service identifier included in the request, satisfy the constraint information, and improve the overall response performance using the history information. It is preferable to have a computer function as a service server to determine.

  In the above program, reservation information, which is information indicating a service use schedule for each user or each user group, is further stored in the recording medium, and the service server determination unit corresponds to the service identifier included in the service request. To determine the service server that performs the service corresponding to the service request so as to satisfy the constraint information and to improve the overall response performance using the reservation information. It is preferable to make a computer function as.

  In the above program, the service server determination unit determines a first service server that performs one service, the service request transmission unit transmits the service request to the first service server, The dynamic history information acquisition unit that acquires dynamic history information that is information indicating the usage status of the service during the execution of the service in the service server, and the constraint information that is paired with the service identifier included in the service request And determining a second service server that performs the service corresponding to the service request so as to satisfy the constraint information and improve the overall response performance using the dynamic history information. And when the second service server is different from the first service server that previously performed the service, A service function that further includes a dynamic service server changing unit that transmits a stop command indicating that the service is to be stopped to the service server and transmits the service request to the second service server. It is suitable to make it.

  In the above program, the service request is a request for a service having a service identifier for identifying a composite service combining two or more services, and the service server determination unit configures a composite service included in the service request. A service server that acquires two or more pieces of constraint information paired with two or more service identifiers that identify each of the above services and performs a service corresponding to the service request so as to satisfy all the two or more pieces of constraint information. It is preferred to have a computer function as a decision.

  FIG. 13 shows the external appearance of a computer that executes the program described in this specification and realizes an apparatus (core server or the like) constituting the information system of the above-described embodiment. The above-described embodiments can be realized by computer hardware and a computer program executed thereon. FIG. 13 is an overview diagram of the computer system 340, and FIG. 14 is a block diagram of the computer system 340.

  In FIG. 13, the computer system 340 includes a computer 341 including an FD drive and a CD-ROM drive, a keyboard 342, a mouse 343, and a monitor 344.

  In FIG. 14, in addition to the FD drive 3411 and the CD-ROM drive 3412, the computer 341 stores an MPU 3413, a bus 3414 connected to the CD-ROM drive 3412 and the FD drive 3411, and a program such as a bootup program. A RAM 3416 for temporarily storing application program instructions and providing a temporary storage space; and a hard disk 3417 for storing application programs, system programs, and data. Although not shown here, the computer 341 may further include a network card that provides connection to the LAN.

A program that causes the computer system 340 to execute functions such as the core server of the above-described embodiment is stored in the CD-ROM 3501 or FD 3502, inserted into the CD-ROM drive 3412 or FD drive 3411, and further stored in the hard disk 3417. May be forwarded. Alternatively, the program may be transmitted to the computer 341 via a network (not shown) and stored in the hard disk 3417. The program is loaded into the RAM 3416 at the time of execution. The program may be loaded directly from the CD-ROM 3501, the FD 3502, or the network.
The program does not necessarily include an operating system (OS), a third-party program, or the like that causes the computer 341 to execute functions such as the core server of the above-described embodiment. The program only needs to include an instruction portion that calls an appropriate function (module) in a controlled manner and obtains a desired result. How the computer system 340 operates is well known and will not be described in detail.

  In the above program, in the step of transmitting information, the step of receiving information, etc., processing performed by hardware, for example, processing performed by a modem or an interface card in the transmitting step (only performed by hardware). Not included).

  Further, the computer that executes the program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  Further, in each of the above embodiments, it goes without saying that two or more communication units existing in one apparatus may be physically realized by one medium.

  In each of the above embodiments, each process (each function) may be realized by centralized processing by a single device (system), or by distributed processing by a plurality of devices. May be.

  The present invention is not limited to the above-described embodiments, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, when using a plurality of services in a large-scale network environment, the information system according to the present invention improves overall response performance while satisfying service provision policies such as license restrictions that vary depending on the service provider. As such, the service server that provides the service can be determined. It is effective as a large-scale information system.

DESCRIPTION OF SYMBOLS 1 Terminal device 2 Service server 3 Core server 11 Terminal reception part 12 Terminal transmission part 13 Terminal reception part 14 Terminal output part 21 Processing means storage part 22 Service server reception part 23 Service part 24 Service server transmission part 25 Processing means storage part 26 Process Means deletion unit 301 User information storage unit 302 Service constraint information storage unit 303 History information storage unit 304 Reservation information storage unit 305 Core server reception unit 306 History information acquisition unit 307 History information storage unit 308 Reservation information storage unit 309 Service server determination unit 310 Core server transmission unit 311 Dynamic history information acquisition unit 312 Dynamic service server change unit

Claims (10)

An information system having two or more terminal devices, two or more service servers, and one or more core servers,
The terminal device
A terminal accepting unit that accepts a service request that is a request for a service having a service identifier for identifying the service;
A terminal transmitter for transmitting the service request to the core server;
A terminal receiving unit for receiving a service result in response to the transmission of the service request;
A terminal output unit for outputting a result of the service received by the terminal reception unit;
The service server
A processing means storage unit capable of storing one or more processing means for performing the service;
A service server receiver that receives the service request from the core server;
In accordance with the service request received by the service server receiving unit, the processing unit of the processing unit storage unit executes the processing unit, performs the service, and obtains the result of the service;
A service server transmission unit for transmitting a service result of the service unit;
The core server is
A service constraint information storage unit capable of storing one or more service constraint information having a service identifier for identifying a service and constraint information that is information regarding the constraint of the service;
A core server receiving unit that receives a service request from the terminal device;
A service server that acquires constraint information paired with a service identifier included in the service request, performs a service corresponding to the service request so as to satisfy the constraint information and improve the overall response performance A service server determination unit for determining
An information system comprising: a core server transmission unit that transmits the service request to a service server determined by the service server determination unit. The core server is
A history information storage unit capable of storing history information, which is information indicating a past usage status of a service for each user or for each user group including two or more users;
The service server determination unit
Acquire constraint information paired with a service identifier included in the service request, and respond to the service request so as to satisfy the constraint information and improve the overall response performance using the history information. The information system according to claim 1, wherein a service server that performs a service is determined. The core server is
A reservation information storage unit capable of storing reservation information, which is information indicating a service use schedule for each user or each user group;
The service server determination unit
Acquire constraint information paired with a service identifier included in the service request, and respond to the service request so as to satisfy the constraint information and improve the overall response performance using the reservation information. The information system according to claim 1 or 2, wherein a service server for performing a service is determined. The core server is
The service server determination unit determines a first service server that performs one service, the service request transmission unit transmits the service request to the first service server, and the first service server A dynamic history information acquisition unit for acquiring dynamic history information, which is information indicating the usage status of the service, during execution of the service;
The service request is acquired so as to obtain the constraint information paired with the service identifier included in the service request, satisfy the constraint information, and improve the overall response performance using the dynamic history information. Determine a second service server that performs the service corresponding to
When the second service server is different from the first service server that has performed the service, the second service server transmits a stop command indicating that the service is to be stopped to the first service server, The information system according to claim 1, further comprising a dynamic service server changing unit that transmits the service request to the second service server. The service request is
A service request having a service identifier that identifies a composite service that combines two or more services;
The service server determination unit
The two or more pieces of constraint information paired with two or more service identifiers that identify two or more services constituting the composite service included in the service request are acquired, and the two or more pieces of constraint information are all satisfied. 5. The information system according to claim 1, wherein a service server that performs a service corresponding to the service request is determined. The core server transmitter is
When changing a service server that performs one service, a stop command indicating that the service is to be stopped is transmitted to the first service server that has previously performed the one service, and the service server determination is performed. The service request is sent to a second service server determined to be newly performed by the service unit,
The service server receiving unit
Receiving the stop command;
The service department
6. The information system according to claim 1, wherein when the service server receiving unit receives the stop command, the execution of the processing unit is stopped. The core server transmitter is
When changing a service server that performs one service, a stop command indicating that the service is to be stopped for the first service server that has previously performed the one service, and the service server determination unit includes: A copy instruction for instructing a copy of the processing means corresponding to the one service to a second service server determined to perform a new service, and a deletion instruction for instructing deletion of the processing means corresponding to the one service; Send to the second service server a service request to activate the processing means copied according to the copy command;
The service server receiving unit
Receiving the stop command, the copy command, and the delete command from the core server;
The service department
When the service server receiving unit receives a stop command, the processing means corresponding to the stop command stops,
When the service server receiving unit receives the copy command, the processing means corresponding to the copy command is copied to the second service server,
6. The information system according to claim 1, wherein when the service server receiving unit receives a deletion command, the processing unit corresponding to the deletion command is deleted from the processing unit storage unit. A service constraint information storage unit capable of storing one or more service constraint information having a service identifier for identifying a service and constraint information that is information regarding the constraint of the service;
A core server receiver that receives a service request from a terminal device;
A service server that acquires constraint information paired with a service identifier included in the service request, performs a service corresponding to the service request so as to satisfy the constraint information and improve the overall response performance A service server determination unit for determining
A core server comprising: a core server transmission unit that transmits the service request to a service server determined by the service server determination unit. The core server which comprises the information system in any one of Claims 1-7. On the recording medium,
Storing one or more service constraint information having a service identifier for identifying a service and constraint information which is information regarding the constraint of the service;
A service server control method realized by a core server reception unit, a service server determination unit, and a core server transmission unit,
The core server reception unit receives a service request, a core server reception step,
The service server determination unit obtains constraint information paired with a service identifier included in the service request, and responds to the service request so as to satisfy the constraint information and improve the overall response performance. A service server determining step for determining a service server that performs a service to be performed;
The core server transmission unit includes a core server transmission step of transmitting the service request to the service server determined in the service server determination step.

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