(19)
(11)EP 3 306 480 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
25.11.2020 Bulletin 2020/48

(21)Application number: 16799637.0

(22)Date of filing:  10.03.2016
(51)International Patent Classification (IPC): 
G06F 13/00(2006.01)
H04L 29/08(2006.01)
H04L 12/733(2013.01)
H04L 29/06(2006.01)
(86)International application number:
PCT/JP2016/057617
(87)International publication number:
WO 2016/189928 (01.12.2016 Gazette  2016/48)

(54)

DESTINATION SERVER INDICATION DEVICE, SERVICE USING SYSTEM, CLIENT TERMINAL, DESTINATION SERVER INDICATION METHOD, AND PROGRAM

ZIELSERVERANZEIGEVORRICHTUNG, DIENST MIT VERWENDUNG DES SYSTEMS, CLIENT-ENDGERÄT, ZIELSERVERANZEIGEVERFAHREN UND PROGRAMM

DISPOSITIF D'INDICATION DE SERVEUR DE DESTINATION, SYSTÈME D'UTILISATION DE SERVICE, TERMINAL CLIENT, PROCÉDÉ D'INDICATION DE SERVEUR DE DESTINATION, ET PROGRAMME


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 26.05.2015 JP 2015106718

(43)Date of publication of application:
11.04.2018 Bulletin 2018/15

(73)Proprietor: NTT Communications Corporation
Chiyoda-ku Tokyo 100-8019 (JP)

(72)Inventors:
  • NITTA, Masashi
    Tokyo 100-8019 (JP)
  • SEI, Akira
    Tokyo 100-8019 (JP)

(74)Representative: Vinsome, Rex Martin 
Urquhart-Dykes & Lord LLP 12th Floor Cale Cross House 156 Pilgrim Street
Newcastle-upon-Tyne NE1 6SU
Newcastle-upon-Tyne NE1 6SU (GB)


(56)References cited: : 
EP-A1- 2 365 675
JP-A- 2008 217 302
JP-A- 2014 056 335
US-A1- 2012 089 671
JP-A- 2003 167 810
JP-A- 2013 171 371
US-A1- 2012 089 671
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present invention relates to a technique for causing a client terminal to connect to a specific server in a service providing system including a plurality of servers.

    BACKGROUND ART



    [0002] In recent years, a service providing system has been introduced in which servers are installed at a plurality of sites in the world to provide services to users. As an example of such a service providing system, there is an MSS (Managed Security Service) providing system. In the MSS, as an example, there is provided a service for detecting unknown attacks by collecting and analyzing log information of various servers that users use.

    [0003] In the service providing system including servers at a plurality of sites in the world like the MSS providing system, a user receives a service by accessing a server serving as a customer portal site from a client terminal.

    [0004] US 2012/0089671 A1 discloses a resource section server for deciding to which instance of a resource to route a client computer which requests a resource from an ISP/OSP maintaining multiple instances of the resource. The resource selection server takes network routability information into account in selecting the instance of the resource, and may also take into account resource utilization, network utilization and/or maintenance of peering agreements.

    RELATED ART DOCUMENT


    [PATENT DOCUMENT]



    [0005] [PATENT DOCUMENT 1]JP2013-171371

    SUMMARY OF THE INVENTION


    PROBLEM TO BE SOLVED BY THE INVENTION



    [0006] In the service providing system like the MSS providing system, databases (DB) for providing services are centrally managed by a technique such as distributed DB and the like, so that a user can receive the same service regardless of sites of servers which the user accesses.

    [0007] In such a service, generally, the user himself/herself designates a domain of a specific site to connect to the server of the site. However, in the scheme in which the user himself/herself designates the site of the connection destination, there are cases in which accesses are concentrated to a specific server, and the user cannot access an optimal server in view of the quality of the server / NW and regional circumstances of the site. Also, depending on circumstances of countries of each site and the like, it may be necessary to restrict servers to which a client terminal connects according to locations of the client terminal. However, in the conventional technique, it is difficult to respond appropriately to the necessity of such restriction.

    [0008] The present invention is contrived in view of the above-mentioned points, and an object of the present invention is to provide a technique that makes it possible to determine a proper server as a connection destination of a client terminal from a plurality of servers that provide services, and to cause the client terminal to connect to the proper server.

    MEANS FOR SOLVING THE PROBLEM



    [0009] According to an aspect of the present invention, there is provided a connection destination server instruction apparatus for causing a client terminal that uses a service of a service providing system including a plurality of servers to connect to a specific server in the plurality of servers, comprising the features of claim 1.

    [0010] According to another aspect of the present invention, there is provided a service use system comprising the features of claim 4.

    [0011] According to another aspect of the present invention, there is provided a connection destination server instruction method executed by a connection destination server instruction apparatus for causing a client terminal that uses a service of a service providing system including a plurality of servers to connect to a specific sever in the plurality of servers, comprising the steps of claim 6.

    EFFECT OF THE PRESENT INVENTION



    [0012] According to an embodiment of the present invention, it becomes possible to provide a technique that makes it possible to determine a proper server as a connection destination of a client terminal from a plurality of servers that provide services, and to cause the client terminal to connect to the proper server.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0013] 

    Fig. 1 is a system block diagram in an embodiment of the present invention;

    Fig. 2 is a sequence diagram for explaining the whole operation of the system;

    Fig. 3 is a flowchart for explaining a procedure of connection destination determination processing by the redirect server 100;

    Fig. 4 is a diagram showing an example of a score table;

    Fig. 5 is a diagram for explaining an example when selecting a server within a specific area;

    Fig. 6 is a diagram for explaining a process example 1 for acquiring a parameter;

    Fig. 7 is a diagram showing an example of a parameter determination table for converting a server parameter to a score;

    Fig. 8 is a diagram for explaining a process example 2 for acquiring a parameter;

    Fig. 9A is a diagram showing an example of a parameter conversion table on the number of hops and arrival time;

    Fig. 9B is a diagram showing an example of a parameter conversion table on the number of hops and arrival time;

    Fig. 10A is a diagram showing an example of a parameter conversion table;

    Fig. 10B is a diagram showing an example of a parameter conversion table;

    Fig. 11A is a diagram showing an example of a parameter conversion table;

    Fig. 11B is a diagram showing an example of a parameter conversion table;

    Fig. 11C is a diagram showing an example of a parameter conversion table;

    Fig. 12 is a block diagram of a redirect server 100;

    Fig. 13 is a block diagram of a client terminal 300.


    EMBODIMENTS FOR CARRYING OUT THE INVENTION



    [0014] In the following, an embodiment of the present invention is described with reference to figures. Note that the embodiment described below is merely an example, and embodiments to which the present invention is applied are not limited to the following embodiment.

    (System whole configuration)



    [0015] Fig. 1 shows a whole configuration example of a system in an embodiment of the present invention. As shown in Fig. 1, the system of the present embodiment includes a redirect server 100, an access source specifying system 200, and a service providing system 400 including a plurality of servers that provide services. Also, as shown in Fig. 1, there is a client terminal 300 that uses the services provided by the service providing system 400. Since service utilization is performed by the client terminal 300 and the redirect server 100, a system including the client terminal 300 and the redirect server 100 may be referred to as a service use system. Also, the redirect server 100 may be referred to as a connection destination server instruction apparatus. Note that "A", "B" and the like in Fig. 1 indicate after-mentioned specific areas.

    [0016] The redirect server 100, the access source specifying system 200, the client terminal 300, and each server forming the service providing system 400 are connected to a network, and they can perform communication at least in sections indicated by the straight lines in Fig. 1. Note that, to be able to perform communication in a section between the service providing system 400 and another apparatus means that communication is available between each server forming the service providing system 400 and another apparatus.

    [0017] In the present embodiment, a network that enables communication between apparatuses is not limited to a specific type of network. For example, the network may be the Internet, a private network, or a network in which the Internet and the private network are mixed. Also, the network may be a radio network, a wired network, or a network in which the radio network and the wired network are coexist.

    [0018] The service providing system 400 is assumed to be a system that provides the beforementioned MSS (Managed Security Service), and a plurality of servers that form the service providing system 400 are placed at sites in the world in a distributed manner. However, this is merely an example, and the present invention can be applied irrespective of area unit where a plurality of servers are arranged. As an example, the present invention can be applied to a service providing system in which a plurality of servers are placed within one building and services are provided in the building.

    [0019] In the service providing system 400 of the present embodiment, databases (DB) for providing services are centrally managed by a technique such as distributed DB and the like, so that the client terminal 300 can receive the same service irrespective of sites of servers that the client terminal 300 accesses. Therefore, a geographical area (example: country) where the client terminal 300 (user) exists and a geographical area where the site of the server that the client terminal 300 accesses exists may be different.

    [0020] However, due to regulations on data protection such as EU data protection or security policies in various countries, for example, within the EU region, if data such as access logs must be stored in a server in the EU region, a distributed DB is constructed by servers within the EU region, and usages are assumed in which the connection destination of a client terminal existing in the EU region (specific area) is restricted within the EU region as described later.

    [0021] The client terminal 300 is, for example, a PC, a smartphone, or the like on which a Web browser and the like is mounted. Upon receiving a connection request from the client terminal 300, the redirect server 100 selects a server as a connection destination of the client terminal 300 from a plurality of servers constituting the service providing system 400, and issues a connection instruction (redirect response) to the client terminal 300.

    [0022] The access source specifying system 200 is a system that holds a database in which an IP address, a country, a city, an ISP, etc. are associated with each other, and the access source specifying system 200 receives an inquiry specifying a source IP address of the client terminal 300 from the redirect server 100 and can return a country name or the like (information indicating a geographical area) corresponding to the source IP address in response to the inquiry. The access source specifying system 200 can be realized by an existing technique such as GEOIP and Whois and the like.

    [0023] In the present embodiment, by using the access source specifying system 200, the redirect server 100 determines (estimates) the geographical area of the location of the client terminal 300, however, the method for the redirect server 100 to determine the geographical area of the location of the client terminal 300 is not limited to this method, and the redirect server 100 may use any method for determining the geographical area of the location of the client terminal 300.

    (Operation of the system)



    [0024] Next, the whole operation of the system of the present embodiment is described with reference to the sequence diagram of Fig. 2.

    [0025] As a premise of the operation of Fig. 2, for example, the redirect server 100 provides a screen of a comprehensive site, so that the client terminal 300 connects to the redirect server 100 first to display the screen, and requests use of a service (example: MSS) of the service providing system 400 from the menu of the screen. The connection request in step S101 in Fig. 2 corresponds to the request. However, such a premise is merely an example.

    [0026] Also, it is assumed that the redirect server 100 collects various parameters used for determining a server that is a connection destination, and holds the parameters in a database that the redirect server 100 has (or a database outside of the redirect server 100). Details on the parameters are described later. The database also holds information (IP address of a server, URL and the like) used by the client terminal 300 for accessing the server.

    [0027] As shown in Fig. 2, the client terminal 300 transmits, to the redirect server 100, a connection request (example: http request) for requesting connection to a server of the service providing system 400 (step S101).

    [0028] The redirect server 100 that receives the connection request acquires an IP address of the transmission source of a packet including the connection request, and transmits, to the access source specifying system 200, a signal for inquiring information (which is a country name, as an example) of a geographical area corresponding to the IP address (step S102). The access source specifying system 200 that receives the inquiry returns a country name corresponding to the IP address to the redirect server 100 (step S103).

    [0029] The redirect server 100 uses the country name (area name) acquired in step S103 as a name of a country (area) in which the client terminal 300 exists, and determines a server as a connection destination of the client terminal 300 based on the country name and parameters and the like held in the database (step S104).

    [0030] The redirect server 100 transmits, to the client terminal 300, a connection destination instruction (example: http redirect response) including connection destination information (URL, IP address and the like of a server) for causing the client terminal 300 to connect to the server determined in step S104 (step S105). The client terminal 300 connects to the server designated by the redirect server 100 using the connection destination information included in the connection destination instruction (step S106).

    (Connection destination determination procedure)



    [0031] Next, a process procedure for determining a connection destination executed by the redirect server 100 is described with reference to a flow chart shown in Fig. 3.

    [0032] The redirect server 100 performs preprocessing for acquiring parameters such as load information of each server, load information of NW apparatuses connecting to a server, the number of hops between the client terminal 300 and each server and the like (step S201). Note that the procedure shown in Fig. 3 focuses on an access to a server by one client terminal 300, thus, the acquisition of the parameters is preprocessing for the access, but, as described later, acquisition of parameters may be executed at any time (periodically, for example).

    [0033] When the redirect server 100 receives a connection request from the client terminal 300 (step S202), the redirect server 100 acquires a country name corresponding to the client terminal 300 from the access source specifying system 200 (step S203).

    [0034] Next, the client terminal 300 creates a score table used for determining a connection destination of the client terminal 300 based on the country name of the location of the client terminal 300, various parameters stored in the database, and a parameter determination table for determining a score from a parameter and the like (step S204).

    [0035] Fig. 4 shows an example of the score table. As shown in the left side of the score table, as parameters of evaluation targets in the score table, there are parameters on each server (to be referred to as server parameters) and parameters indicating correlation between the client terminal 300 and the server (to be referred to as terminal parameters). Note that parameters shown in Fig. 4 are examples.

    [0036] As the server parameters, there are the number of connections indicating the number of client terminals to which the server is providing a service, CPU usage rate, memory usage rate, usage rate (example: traffic amount, CPU usage rate, port usage rate and the like) of NW apparatuses (switch, router and the like) to which the server is connected, server redundancy, server spec, regional risk and the like.

    [0037] The server redundancy is, for example, the number of servers in the same site (example: same country), and the greater the number is, the higher the redundancy is. The server spec is, for example, CPU, memory, disk configuration, redundancy of power source and the like. The regional risk is a risk specific to the site, such as quality of server installation environment, preparation for disaster, possibility of occurrence of disaster, NW quality and the like, in a site (country, city, area and the like) where the server is placed.

    [0038] In the above-mentioned server parameters, as to the number of connections, the CPU usage rate, the memory usage rate, the NW apparatus usage rate and the like, the redirect server 100 regularly acquires them from each apparatus and stores them in the database, for example. As to the server redundancy, the server spec, the regional risk and the like, the redirect server 100 stores them beforehand in the database of the redirect server 100, and updates them when there is a change. Also, as to the server redundancy, the server spec, the regional risk and the like, a score may be held as a parameter.

    [0039] As terminal parameters, there are language information of a browser used in the client terminal 300, a distance between the client terminal 300 and the server, the number of hops (the number of routers to be passed through) between the client terminal 300 and the server, availability of cross-border and the like. Note that arrival time of a packet from the client terminal 300 to the server may be used as a terminal parameter in addition to the number of hops between the client terminal 300 and the server.

    [0040] As to the language information of the browser, the redirect server 100 can acquire it from the connection request (http request) received from the client terminal 300.

    [0041] As to the distance between the client terminal 300 and the server, for example, the redirect server 100 can determine it from a country name that is acquired when receiving an access from the client terminal 300 and a country name of the server. In this determination, a distance between locations may be calculated by determining specific locations in countries, or, a distance may be calculated for each combination of countries and stored in a table beforehand, so that a distance may be acquired from the table. Also, a score of distance may be determined for each combination of countries and the score may be held.

    [0042] As to the number of hops and the arrival time, for example, the client terminal 300 acquires them by using a command such as traceroute and the like for each server, and reports the acquired number of hops/arrival time to the redirect server 100. Methods for acquiring the number of hops and the arrival time are not limited to specific methods, and for example, it may be possible to install, in the client terminal 300 and the server, a program for acquiring the number of hops and the arrival time so as to acquire the number of hops and the arrival time by the program.

    [0043] The information of availability of cross-border is information specific to an area (country, region and the like) to which the server belongs, and the information is, for example, information indicating whether there is legal restriction in taking data, managed within a specific area (example: within the EC area), out of the specific area. Also, in addition to such legal restriction, the "availability of cross-border" of the present embodiment includes information determined by a service operator. This is, for example, information indicating that the connection destination of the client terminal 300 in Japan is restricted to servers in Japan. Information of availability of cross-border is stored in a database for each server.

    [0044] Note that it is not essential to use all the parameters shown in Fig. 4. Since a distance to a server can be determined from a country name of the client terminal 300, terminal parameters such as the number of hops and the arrival time may not be used, for example.

    [0045] As shown in Fig. 4, for each parameter, scores for each server are determined for the client terminal 300 that transmits the connection request and the scores are written in a score table. In the present embodiment, a server is indicated by the country name of the site and a number of the server (in the case in which there are a plurality of servers).

    [0046] A score for a parameter is determined by a parameter determination table held in the database. Note that, in the example of Fig. 4, as to cross-border availability, ○ is indicated to a server that exists in an area where cross-border is available, and for a server that exists in an area where cross-border is unavailable, a group number that indicates an area range where access is restricted is shown. For example, Group 2 is described for German servers DE 1 and DE 2 and Group 1 is described for a Japanese server JP. This means that connection destination of a client terminal 300 in Germany is restricted to DE 1 and DE 2, and connection destination of a client terminal 300 in Japan is restricted to JP.

    [0047] In creating the score table in step S204 of Fig. 3, a score (for example, a score such as the CPU usage rate of a server) that can be determined without depending on the country name of the client terminal 300 is determined before receiving the connection request from the client terminal 300, and the score is entered in the score table. With respect to a score (for example, a core of distance) determined depending on the country name of the client terminal 300, the score is determined after receiving the connection request, and the score is entered in the score table. Of course, it is also possible to determine all the scores and enter them in the score table after receiving the connection request.

    [0048] In step S205 of Fig. 3, the redirect server 100 determines whether the area (country name) of the location of the access source client terminal 300 belongs to a specific area (step S205). The "specific area" in the present embodiment is an area where cross-border is unavailable.

    [0049] In the present embodiment, for example, it is determined that countries within the EU region belong to the "specific area". Also, in this embodiment, it is determined that Japan belongs to the "specific area" because there is a strong need, in Japan, for accessing domestic servers and managing data in Japan. Also, for a country other than Japan, if there is a need similar to Japan, it is determined that the country belongs to the "specific area". Note that, as to which countries (or one country) the "specific area" includes, it can be identified by the Group number in the score table.

    [0050] Regarding determination of belonging or not to the "specific area", it may be determined by referring to the score table, or the table shown in FIG. 5 may be prepared in a database and, it may be determined by referring to the table.

    [0051] The table shown in Fig. 5 is a table showing, for each country corresponding to the "specific area", a target country (a country included in the specific area) to which the client terminal 300 of the country can connect, and servers in the target country.

    [0052] In the example of Fig. 5, when a country of a client terminal 300 of an access source is the United Kingdom (UK), a country of a server that becomes a connection destination of the client terminal 300 is limited to Germany and UK, and a server of the connection destination is selected from DE 1, 2, 3, and UK 1, 2, 3.

    [0053] When the location is determined to be a "specific area" in step S205, the process goes to step S206, and when the location is not determined to be a "specific area", the process goes to step S207.

    [0054] In step S206 in which the location is determined to be a "specific area", the redirect server 100 selects a server to which the client terminal 300 is caused to connect from a server group within the specific area. For example, for the case of the example of the above-mentioned UK, the redirect server 100 selects a server from a server group (DEI, 2, 3, UK1, 2, 3) within the specific area (Germany, UK).

    [0055] In step S207 in which the location is not determined to be a "specific area", the redirect server 100 selects a server from the whole server groups.

    [0056] In steps S206 and S207, the redirect server 100 refers to the score table (example: Fig. 4), adds scores for all parameters having scores for each server in a server group in a selection range, and selects a server for which the score is the smallest. Note that, in the present embodiment, a server with the smallest score is selected since the score calculation method in which the score becomes large when the server is not suitable for accessing is adopted, however, this is merely an example. A server for which the score is the largest may be selected by adopting a score assigning method in which the score becomes large when the server is suitable for accessing.

    [0057] As an example, in the example of Fig. 4, when the country of the client terminal 300 is SG (Singapore), since SG is cross-border available, a server is selected from the whole server groups. Then, in the case of Fig. 4, since the server / NW of SG is tight, the score of the server / NW is high. Therefore, even when the location of the client terminal 300 is SG, as a result, a server of JP having the smallest sum of scores is selected (surrounded by a frame indicated by A in Fig. 4).

    [0058] Note that when the server group in a specific area is one server, the determination based on the score may not be performed, or may be performed. When the server group in the specific area is one server and determination based on the score is performed, for example, when the score is very bad (when the connection to the server is not appropriate), it is possible to return a message that prohibits the client terminal 300 from connecting to the server, or select a server in another area.

    [0059] Also, in the present embodiment, as shown in Fig. 4, scores are processed in a table format, however, the table format is an example. It is not necessary to use the table format if any processing method that can calculate the score is adopted.

    [0060] In step S208 of Fig. 3, the redirect server 100 instructs the client terminal 300 to connect to the selected server.

    (As to parameter and score)



    [0061] In the following, acquisition of parameters and conversion to scores are described in more detail.

    [0062] Fig. 6 is a sequence diagram showing an example of processing for acquiring a server parameter. As show in in Fig. 6, the redirect server 100 transmits a parameter acquisition request to each server (step S301) and acquires parameters (number of connections, CPU usage rate, memory usage rate, and the like) from each server (step S302), and the redirect server 100 transmits a parameter acquisition request to each NW apparatus (step S303) to acquire parameters from each NW apparatus (step S304). The acquired parameters are stored in the database (step S305).

    [0063] The above-mentioned parameter acquisition can be executed by using an SNMP protocol, for example. Also, the parameter acquisition is executed periodically, for example.

    [0064] The redirect server 100 calculates a score corresponding to an acquired parameter by referring to a parameter determination table as shown in Fig. 7, for example, and stores the score in the database. The parameter determination table is a table which is set in advance in the database.

    [0065] In the example shown in Fig. 7, for example, when the number of connections "10" is acquired as a parameter of a server, the score corresponding to the parameter of the server is "50".

    [0066] Fig. 8 is a sequence diagram showing an example of processing for acquiring terminal parameters. As shown in Fig. 8, a request packet for parameter acquisition is transmitted to each server (step S401), and a response packet is received from each server (step S402). For example, the response packet includes the number of hops (the number of routers passing through) of a route from the client terminal 300 to the server, and includes an arrival time until the request packet arrives at the server from the client terminal 300.

    [0067] In the present embodiment, by installing a program for executing the processing for acquiring the parameters in the client terminal 300, the above processing can be realized. Also, the number of hops, the arrival time, and the like may be acquired using functions, such as traceroute, generally provided in the server or the client terminal 300.

    [0068] The client terminal 300 that acquired the terminal parameter in step S402 notifies the redirect server 100 of the parameter (step S 403). The redirect server 100 stores the parameter received from the client terminal 300 in the database together with information (example: IP address) that can identify the client terminal 300 (step S404).

    [0069] The above processing may be performed periodically or at the timing when the client terminal 300 transmits a connection request to the redirect server 100. That is, for example, when an operation for transmitting a connection request is performed to the client terminal 300 by the user, the client terminal 300 acquires the terminal parameter and transmits the acquired terminal parameter and the connection request to the redirect server 100.

    [0070] The redirect server 100 calculates a score corresponding to the acquired parameter by referring to a parameter determination table as shown in Figs. 9A and 9B, for example, and stores the score in the database. The parameter determination table is a table which is set in advance in the database.

    [0071] In the example shown in FIG. 9A, for example, when the number of hops "7" is acquired as a parameter of the client terminal 300 for a certain server, the score corresponding to the parameter of the server is "100". In the example shown in Fig. 9B, for example, when an arrival time "50 ms" is acquired as a parameter of the client terminal 300 for a certain server, the score corresponding to the parameter of the server is "50".

    [0072] In the following, examples of parameters determination tables are further described.

    [0073] Fig. 10A is an example of a parameter determination table in which parameters of browser language information, which is one of the terminal parameters, and scores are associated with each other. In Fig. 10A, parameters of the browser language information are shown as JP, CN, and the like, and, for each parameter, scores are shown for each server site. Note that Fig. 10A shows a part of sites. For example, when the language used by the browser is CN (Chinese), the score for a server in Singapore (SG) is 100.

    [0074] Fig. 10B is an example of a parameter determination table in which parameters of distance which is one of terminal parameters, and scores are associated with each other. In Fig. 10B, country names are shown as distances. Note that Fig. 10B shows a part of sites. For example, when the distance is "JP", the score for a server whose location is CN (Chinese) is 100.

    [0075] Fig. 11A is an example of a parameter determination table for server redundancy. Since the server redundancy is basically statically determined, in this example, server redundancy is recorded as a score directly so that the parameter determination table is made. For example, the score of the server "UK" is 50.

    [0076] Fig. 11B is an example of a parameter determination table for server specs. Since server specs are also basically statically determined, also in this example, server specs are recorded directly as scores so that the parameter determination table is made. For example, the score of the server "UK" is 100.

    [0077] Fig. 11C is an example of a parameter determination table for regional risks. Since regional risks are also basically statically determined, also in this example, regional risks are recorded directly as scores so that the parameter determination table is made. For example, the score of the server "UK" is 50.

    [0078] Each of the above scores is basically statically determined, however, there are quite a few cases where scores change, so they are periodically checked, and when there is a difference from a present state, update is performed.

    (Apparatus configuration)


    <Redirect server 100>



    [0079] Fig. 12 shows a configuration example of the redirect server 100 that can execute processing described so far.

    [0080] As shown in Fig. 12, the redirect server 100 includes a database 101, a parameter acquisition unit 102, a connection request reception unit 103, an inquiry unit 104, a score table creation unit 105, a connection destination determination unit 106, and a connection instruction unit 107.

    [0081] The database 101 stores information necessary for the redirect server 100 to select a server to which the client terminal 300 is caused to connect, such as the various parameters, the score table, the parameter determination tables, and the like described so far. Note that the database 100 may be provided outside of the redirect server 100.

    [0082] The parameter acquisition unit 102 acquires server parameters from servers / NW apparatuses, receives terminal parameters such as the number of hops and the like from the client terminal 300, and stores them in the database 101. When storing them in the database 101, a parameter that can be converted to a score (a parameter whose score is determined without depending on the location of the client terminal 300, and the like) may be stored after conversion into a score. Also, scores may be stored in a format in which part of the score table is filled.

    [0083] When receiving a connection request from the client terminal 300, the connection request reception unit 103 passes an IP address of the transmission source to the inquiry unit 104 to request acquisition of the country name. The inquiry unit 104 inquires the access source specifying system 200 about the country name corresponding to the IP address of the transmission source of the connection request and acquires the country name.

    [0084] The score table creation unit 105 creates a score table (example: Fig. 4) from the location (country name) of the client terminal 300, parameters acquired from servers / NW apparatuses, parameters acquired from the client terminal 300, static parameters, the parameter conversion tables and the like. For example, in the example of FIG. 4, before receiving a connection request from the client terminal 300, the score table creation unit 105 creates a score table in which scores related to server parameters determined without depending on the location of the client terminal 300 and information on cross-border availability (○, Group number, and the like) are filled. Then, when receiving a connection request from the client terminal 300, the score table is completed by writing scores on terminal parameters such as the browser language information, the distance, the number of hops and the like for the client terminal 300 into the score table, and stores it in the database 101.

    [0085] The connection destination determination unit 106 determines a server as a connection destination of the client terminal 300 based on the score table created by the score table creation unit 105. The connection instruction unit 107 transmits, to the client terminal 300, a connection destination instruction for causing the client terminal 300 that is a transmission source of the connection request to connect to a sever determined by the connection destination determination unit 106.

    [0086] The functions of the redirect server 100 shown in Fig. 12 are shown as main functions. Also, functional divisions shown in Fig. 12 are merely examples, and functional divisions are not limited to functional divisions shown in Fig. 12 as long as processes described in the present embodiment can be performed.

    [0087] The redirect server 100 of the present embodiment can be realized by causing one or a plurality of computers to execute a program that describes the process content described in the present embodiment. More specifically, the function of the redirect server 100 can be realized by executing a program corresponding to processes performed by the redirect server 100 by using hardware resources such as a processor like a CPU, a memory and a hard disk and the like in the computer. The program can be saved and distributed by recording the program in a computer readable recording medium (such as portable memory). Also, the program can be provided via a network such as the Internet, an electronic mail and the like.

    [0088] Also, each unit forming the redirect server 100 may be formed by hardware circuits.

    <Client terminal 300>



    [0089] Fig. 13 is a configuration example of the client terminal 300 that can execute processing described so far.

    [0090] As shown in Fig. 13, the client terminal 300 includes a connection request unit 301, a connection destination instruction reception unit 302, a parameter acquisition unit 303, and a parameter notification unit 304. The connection request unit 301 transmits a connection request to the redirect server 100 based on, for example, an operation by a user, and executes connection to a server based on a connection destination instruction received by the connection destination instruction reception unit 302. The connection destination instruction reception unit 302, receives from the redirect server 100, a connection destination instruction instructing connection to the server determined by the redirect server 100.

    [0091] In the present embodiment, it is assumed that connection requests and services are utilized on a Web basis, and the connection request unit 301 and the connection destination instruction reception unit 302 can be realized by a Web browser provided in the client terminal 300.

    [0092] The parameter acquisition unit 303 transmits a request packet for a terminal parameter to each server periodically or when the connection request unit 301 is instructed to connect to the redirect server 100, so that the parameter acquisition unit 303 acquires terminal parameters (the number of hops, arrival time, and the like) related to each server. The parameter notification unit 304 transmits the terminal parameters acquired by the parameter acquisition unit 303 to the redirect server 100. For example, the parameter notification unit 304 is realized as an agent in the client terminal 300.

    [0093] The functions of the client terminal 300 shown in Fig. 13 are shown as main functions. Also, functional divisions shown in Fig. 13 are merely examples, and functional divisions are not limited to functional divisions shown in Fig. 13 as long as processes described in the present embodiment can be performed.

    [0094] The client terminal 300 of the present embodiment can be realized by causing a terminal, such as a PC and a smartphone, including a function of a computer to execute a program that describes the process content described in the present embodiment. More specifically, the function of the client terminal 300 can be realized by executing a program corresponding to processes performed by the client terminal 300 by using hardware resources such as a processor like a CPU, a memory and a hard disk and the like in the computer. The program can be saved and distributed by recording the program in a computer readable recording medium (such as portable memory). Also, the program can be provided via a network such as the Internet, an electronic mail and the like.

    [0095] Also, each unit forming the client terminal 300 may be formed by hardware circuits.

    (Summary of embodiment)



    [0096] According to the present embodiment, there is provided a connection destination server instruction apparatus for causing a client terminal that uses a service of a service providing system including a plurality of servers to connect to a specific sever in the plurality of servers, including:

    parameter acquisition means configured to acquire a server parameter on each server of the plurality of servers;

    area name acquisition means configured to acquire an area name of a location of the client terminal based on a connection request received from the client terminal;

    connection destination determination means configured, when an area indicated by the area name belongs to a specific area, to regard one or more servers placed in the specific area in the plurality of servers to be candidates of the specific server, and to determine the specific server from the one or more servers that are the candidates by using the server parameter acquired by the parameter acquisition means; and

    connection destination instruction means configured to transmit, to the client terminal, information of the specific server determined by the connection destination determination means.



    [0097] When the area indicated by the area name does not belong to the specific area, the connection destination determination means may regard all servers forming the service providing system to be candidates of the specific server.

    [0098] The parameter acquisition means may acquire, from the client terminal, a terminal parameter that is information on a route between the client terminal and each server, and the connection destination determination means may determine the specific server from the one or more servers that are the candidates by using the server parameter and the terminal parameter.

    [0099] The connection destination determination means may obtain a score corresponding to each parameter acquired by the parameter acquisition means for each of the plurality of servers forming the service providing system, and determine the specific server based on a sum of scores on each server.

    [0100] According to the present embodiment, there is provided a service use system including a connection destination server instruction apparatus for causing a client terminal that uses a service of a service providing system including a plurality of servers to connect to a specific sever in the plurality of servers, and the client terminal,
    the client terminal including:

    terminal parameter acquisition means configured to acquire a terminal parameter that is information on a route between the client terminal and each server; and

    parameter notification means configured to notify the connection destination server instruction apparatus of the terminal parameter,

    the connection destination server instruction apparatus including:

    parameter acquisition means configured to acquire a server parameter on each server of the plurality of servers, and the terminal parameter;

    area name acquisition means configured to acquire an area name of a location of the client terminal based on a connection request received from the client terminal;

    connection destination determination means configured, when an area indicated by the area name belongs to a specific area, to regard one or more servers placed in the specific area in the plurality of servers to be candidates of the specific server, and to determine the specific server from the one or more servers that are the candidates by using the server parameter and the terminal parameter acquired by the parameter acquisition means; and

    connection destination instruction means configured to transmit, to the client terminal, information of the specific server determined by the connection destination determination means.



    [0101] Also, according to the present embodiment, there is provided a client terminal in a service use system including a connection destination server instruction apparatus for causing a client terminal that uses a service of a service providing system including a plurality of servers to connect to a specific sever in the plurality of servers, and the client terminal, including
    terminal parameter acquisition means configured to acquire a terminal parameter that is information on a route between the client terminal and each server;
    parameter notification means configured to notify the connection destination server instruction apparatus of the terminal parameter;
    connection request means configured to transmit a connection request to the connection destination server instruction apparatus; and
    reception means configured to receive information of the specific server that is determined from the plurality of servers by using the terminal parameter in the connection destination server instruction apparatus that receives the connection request.

    [0102] The redirect server 100 is an example of the connection destination server instruction apparatus. The parameter acquisition unit 102 is an example of the parameter acquisition means. The connection request reception unit 103 and the inquiry unit 104 are examples of the area name acquisition means. Also, the connection destination determination unit 106 is an example of the connection destination determination means, and the connection instruction unit 107 is an example of the connection destination instruction means. Note that, parameter acquisition means, area name acquisition means, connection destination determination means and connection destination instruction means of the connection destination server instruction apparatus may be replaced with a parameter acquisition unit, an area name acquisition unit, a connection destination determination unit and a connection destination instruction unit respectively.

    [0103] Also, the client terminal 300 is an example of the client terminal. The parameter acquisition unit 303 is an example of the terminal parameter acquisition means, and the parameter notification unit 304 is an example of the parameter notification means. The connection request unit 301 is an example of the connection request means, and the connection destination instruction reception unit 302 is an example of the connection destination instruction reception means. Note that, terminal parameter acquisition means, parameter notification means, connection request means, and reception means in the client terminal may be replaced with a terminal parameter acquisition unit, a parameter notification unit, a connection request unit, and a reception unit respectively.

    (On effects of the embodiment)



    [0104] In the prior art, since a user directly designates a connection destination to access a server, accesses may be concentrated to a server of one site so that it becomes difficult to continue services. Also, circuit load and server load may increase, so that there may be a case in which unexpected additional investment which is different from initial schedule becomes necessary.

    [0105] According to the technique of the present embodiment, it becomes possible to solve the above problem, and to select a connection destination server appropriately to cause the user to connect to the server.

    [0106] Also, as represented by EU data protection, it is necessary to respond to needs such as restriction of cross-border transfer of security monitoring logs (personal access logs, and the like) and restriction of country from which the logs can be accessed. So, according to the technique of the present embodiment, it becomes possible to deal with such restrictions and needs.

    [0107] The field of application of the technique according to the present embodiment is not limited to a specific field. However, in the present embodiment, as an example, the application target is a system for providing managed security services distributed at global sites. By applying the present technology to such a system for providing the managed security services, it becomes possible that a user can connect to an optimal server even if there are restricting conditions in which, for example, a storing destination of data is restricted to a domestic specific server, and a server of access destination is restricted to a domestic specific server. In addition, even if the number of servers to be added is limited in the system, it is possible to avoid congestion without adding additional facilities. Furthermore, even in situations where quality of each server varies, it is possible to provide the services with the optimum quality to users.

    [0108] The present invention is not limited to the specifically disclosed embodiment, and variations and modifications may be made without departing from the scope of the claims.

    DESCRIPTION OF REFERENCE SIGNS



    [0109] 

    100 redirect server

    101 database

    102 parameter acquisition unit

    103 connection request reception unit

    104 inquiry unit

    105 score table creation unit

    106 connection destination determination unit

    107 connection instruction unit

    200 access source specifying system

    300 client terminal

    301 connection request unit

    302 connection destination instruction reception unit

    303 parameter acquisition unit

    304 parameter notification unit

    400 service providing system




    Claims

    1. A connection destination server instruction apparatus (100) for causing a client terminal (300) that uses a service of a service providing system (400) including a plurality of servers to connect to a specific server in the plurality of servers, comprising:

    parameter acquisition means (102) configured to acquire a server parameter on each server of the plurality of servers;

    area name acquisition means (103, 104) configured to acquire an area name of a location of the client terminal (300) based on a connection request received from the client terminal (300);

    a connection destination determination means (106); and

    connection destination instruction means (107) configured to transmit, to the client terminal (300), information of the specific server determined by the connection destination determination means (106) ;

    characterized in that:

    the connection destination determination means (106) is configured, when an area indicated by the area name belongs to a specific area, to regard one or more servers placed in the specific area in the plurality of servers to be candidates of the specific server, and to determine the specific server from the one or more servers that are the candidates by using the server parameter acquired by the parameter acquisition means (102);

    the connection destination determination means (106) is configured to convert each of a plurality of server parameters including regional risk to a score, and to determine the specific server based on a sum of scores, and

    the connection destination determination means (106) is configured to update a score of the regional risk when there is a change based on periodic checking.


     
    2. The connection destination server instruction apparatus (100) as claimed in claim 1, wherein, when the area indicated by the area name does not belong to the specific area, the connection destination determination means (106) regards all servers forming the service providing system (400) to be candidates of the specific server.
     
    3. The connection destination server instruction apparatus (100) as claimed in claim 1 or 2, wherein the parameter acquisition means (102) acquires, from the client terminal (300), a terminal parameter that is information on a route between the client terminal (300) and each server, and
    the connection destination determination means (106) determines the specific server from the one or more servers that are the candidates by using the server parameter and the terminal parameter.
     
    4. A service use system including a connection destination server instruction apparatus (100) for causing a client terminal (300) that uses a service of a service providing system (400) including a plurality of servers to connect to a specific sever in the plurality of servers, and the client terminal (300),
    the client terminal (300) comprising:

    terminal parameter acquisition means (303) configured to acquire a terminal parameter that is information on a route between the client terminal (300) and each server; and

    parameter notification means (304) configured to notify the connection destination server instruction apparatus (100) of the terminal parameter,

    the connection destination server instruction apparatus (100) comprising:

    parameter acquisition means (102) configured to acquire a server parameter on each server of the plurality of servers, and the terminal parameter;

    area name acquisition means (103, 104) configured to acquire an area name of a location of the client terminal based on a connection request received from the client terminal (300);

    connection destination determination means (106); and

    connection destination instruction means (107) configured to transmit, to the client terminal (300), information of the specific server determined by the connection destination determination means (106) ;

    characterized in that

    said connection destination determination means (106) is configured, when an area indicated by the area name belongs to a specific area, to regard one or more servers placed in the specific area in the plurality of servers to be candidates of the specific server, and to determine the specific server from the one or more servers that are the candidates by using the server parameter and the terminal parameter acquired by the parameter acquisition means (102); and

    the connection destination determination means (106) is configured to convert the terminal parameter to a score, to convert each of a plurality of server parameters including regional risk to a score, and to determine the specific server based on a sum of scores, and

    the connection destination determination means (106) is configured to update a score of the regional risk when there is a change based on periodic checking.


     
    5. A program for causing a computer to function as each means in the connection destination server instruction apparatus (100) as claimed in any one of claims 1 to 3.
     
    6. A connection destination server instruction method executed by a connection destination server instruction apparatus (100) for causing a client terminal (300) that uses a service of a service providing system (400) including a plurality of servers to connect to a specific sever in the plurality of servers, comprising:

    a parameter acquisition step (S201; S301, S302) of acquiring a server parameter on each server of the plurality of servers;

    an area name acquisition step (S203) of acquiring an area name of a location of the client terminal (300) based on a connection request received from the client terminal (300);

    a connection destination determination step (S206); and

    a connection destination instruction step (S208) of transmitting, to the client terminal (300), information of the specific server determined by the connection destination determination step (S206);

    characterized in that:

    the connection destination determination step (S206) comprises, when an area indicated by the area name belongs to a specific area, regarding one or more servers in the specific area in the plurality of servers to be candidates of the specific server, and determining the specific server from the one or more servers that are the candidates by using a server parameter acquired by the parameter acquisition step (S201; S301, S302);

    wherein, in the connection destination determination step (S206), the connection destination server instruction apparatus (100) converts each of a plurality of server parameters including regional risk to a score, and determines the specific server based on a sum of scores, and

    wherein a score of the regional risk is updated when there is a change based on periodic checking.


     


    Ansprüche

    1. Verbindungszielserver-Anweisungsvorrichtung (100), um ein Client-Endgerät (300), das einen Dienst eines Dienstbereitstellungssystems (400) verwendet, einschließlich einer Vielzahl von Servern, zu veranlassen, eine Verbindung zu einem bestimmten Server in der Vielzahl von Servern herzustellen, umfassend:

    Parametererfassungsmittel (102), die konfiguriert sind, um einen Serverparameter auf jedem Server der Vielzahl von Servern zu erfassen;

    Bereichsnamenerfassungsmittel (103, 104), die konfiguriert sind, um einen Bereichsnamen eines Standorts des Client-Endgeräts (300) basierend auf einer Verbindungsanforderung zu erfassen, die von dem Client-Endgerät (300) empfangen wird;

    Verbindungszielbestimmungsmittel (106); und

    Verbindungsziel-Anweisungsmittel (107), die konfiguriert sind, um Informationen des bestimmten Servers, die durch die Verbindungszielbestimmungsmittel (106) bestimmt werden, an das Client-Endgerät (300) zu senden;

    dadurch gekennzeichnet, dass:

    die Verbindungszielbestimmungsmittel (106) konfiguriert sind, wenn ein durch den Bereichsnamen angezeigter Bereich zu einem bestimmten Bereich gehört, einen oder mehrere Server, die in dem bestimmten Bereich in der Vielzahl von Servern platziert sind, als Kandidaten des bestimmten Servers zu betrachten, und den bestimmten Server von einem oder mehreren Servern, die die Kandidaten sind, unter Verwendung des Serverparameters, der durch die Parametererfassungsmittel (102) erfasst wird, zu bestimmen;

    die Verbindungszielbestimmungsmittel (106) konfiguriert sind, um jeden einer Vielzahl von Serverparametern, einschließlich des regionalen Risikos für eine Wertung, umzuwandeln, und um den bestimmten Server basierend auf einer Summe von Wertungen zu bestimmen, und

    die Verbindungszielbestimmungsmittel (106) konfiguriert sind, um eine Wertung des regionalen Risikos zu aktualisieren, wenn eine Änderung basierend auf einer periodischen Überprüfung vorliegt.


     
    2. Verbindungszielserver-Anzeigevorrichtung (100) nach Anspruch 1, wobei, wenn der durch den Bereichsnamen angezeigte Bereich nicht zu dem bestimmten Bereich gehört, die Verbindungszielbestimmungsmittel (106) alle Server, die das Dienstbereitstellungssystem (400) bilden, als Kandidaten des bestimmten Servers betrachten.
     
    3. Verbindungszielserver-Anzeigevorrichtung (100) nach Anspruch 1 oder 2, wobei die Parametererfassungsmittel (102) von dem Client-Endgerät (300) einen Endgerätparameter erfassen, der Informationen auf einer Route zwischen dem Client-Endgerät (300) und jedem Server ist, und
    die Verbindungszielbestimmungsmittel (106) den bestimmten Server von dem einen oder den mehreren Servern, die die Kandidaten sind, unter Verwendung des Serverparameters und des Endgerätparameters bestimmen.
     
    4. Dienstverwendungssystem, einschließlich einer Verbindungszielserver-Anweisungsvorrichtung (100), um ein Client-Endgerät (300), das einen Dienst eines Dienstbereitstellungssystems (400) verwendet, einschließlich einer Vielzahl von Servern, zu veranlassen, eine Verbindung zu einem bestimmten Server in der Vielzahl von Servern, und dem Client-Endgerät (300) herzustellen;
    das Client-Endgerät (300) umfassend:

    Endgerätparametererfassungsmittel (303), die konfiguriert sind, um einen Endgerätparameter zu erfassen, der Informationen über eine Route zwischen dem Client-Endgerät (300) und jedem Server ist; und

    Parameterbenachrichtigungsmittel (304), die konfiguriert sind, um die Verbindungszielserver-Anweisungsvorrichtung (100) über den Endgerätparameter zu benachrichtigen,

    die Verbindungszielserver-Anweisungsvorrichtung (100) umfassend:

    Parametererfassungsmittel (102), die konfiguriert sind, um einen Serverparameter auf jedem Server der Vielzahl von Servern, und den Endgerätparameter zu erfassen;

    Bereichsnamenerfassungsmittel (103, 104), die konfiguriert sind, um einen Bereichsnamen eines Standorts des Client-Endgeräts basierend auf einer vom Client-Endgerät (300) empfangenen Verbindungsanforderung zu erfassen;

    Verbindungszielbestimmungsmittel (106); und

    Verbindungsziel-Anweisungsmittel (107), die konfiguriert sind, um Informationen über den bestimmten Server, der durch die Verbindungszielbestimmungsmittel (106) bestimmt wird, an das Client-Endgerät (300) zu senden;

    dadurch gekennzeichnet, dass

    das die Verbindungszielbestimmungsmittel (106) konfiguriert sind, wenn ein durch den Bereichsnamen angezeigter Bereich zu einem bestimmten Bereich gehört, einen oder mehrere Server, die in dem bestimmten Bereich in der Vielzahl von Servern platziert sind, als Kandidaten des bestimmten Servers zu betrachten, und um den bestimmten Server von dem einen oder mehreren Servern, die die Kandidaten sind, unter Verwendung des Serverparameters und des Endgerätparameters, die durch die Parametererfassungsmittel (102) erfasst werden, zu bestimmen; und

    die Verbindungszielbestimmungsmittel (106) konfiguriert sind, um den Endgerätparameter in eine Wertung umzuwandeln, um jeden einer Vielzahl von Serverparametern einschließlich des regionalen Risikos in eine Wertung umzuwandeln, und um den bestimmten Server basierend auf einer Summe von Wertungen zu bestimmen, und

    die Verbindungszielbestimmungsmittel (106) konfiguriert sind, um eine Wertung des regionalen Risikos zu aktualisieren, wenn eine Änderung basierend auf einer periodischen Überprüfung vorliegt.


     
    5. Programm, um einen Computer zu veranlassen, als jede Mittel in der Verbindungszielserver-Anweisungsvorrichtung (100) zu fungieren, wie in einem der Ansprüche 1 bis 3 beansprucht.
     
    6. Verbindungszielserver-Anweisungsverfahren, das von einer Verbindungszielserver-Anweisungsvorrichtung (100) ausgeführt wird, um ein Client-Endgerät (300) zu veranlassen, das einen Dienst eines Dienstbereitstellungssystems (400) verwendet, einschließlich einer Vielzahl von Servern, eine Verbindung zu einem bestimmten Server einer Vielzahl von Servern herzustellen, umfassend:

    einen Parametererfassungsschritt (S201; S301, S302), um einen Serverparameter auf jedem Server der Vielzahl von Servern zu erfassen;

    einen Bereichsnamenerfassungsschritt (S203), um einen Bereichsnamen eines Standorts des Client-Endgeräts basierend auf einer vom Client-Endgerät (300) empfangenen Verbindungsanforderung zu erfassen;

    einen Verbindungszielbestimmungsschritt (S206); und

    einen Verbindungsziel-Anweisungsschritt (S208), um Informationen über den bestimmten Server, der durch die Verbindungszielbestimmungsmittel (106) bestimmt wird, an das Client-Endgerät (300) zu senden;

    dadurch gekennzeichnet, dass:

    der Verbindungszielbestimmungsschritt (S206) umfasst, wenn ein durch den Bereichsnamen angezeigter Bereich zu einem bestimmten Bereich gehört, einen oder mehrere Server in dem bestimmten Bereich in der Vielzahl von Servern als Kandidaten des bestimmten Servers zu betrachten, und den bestimmten Server aus dem einen oder den mehreren Servern zu bestimmen, die die Kandidaten sind, unter Verwendung eines Serverparameters, der durch den Parametererfassungsschritt (S201; S301, S302) erfasst wird;

    wobei, in dem Verbindungszielbestimmungsschritt (S206), die Verbindungszielserver-Anweisungsvorrichtung (100) jeden einer Vielzahl von Serverparametern, einschließlich des regionalen Risikos für eine Wertung, umwandelt, und den bestimmten Server basierend auf einer Summe von Wertungen bestimmt, und

    wobei eine Wertung des regionalen Risikos aktualisiert wird, wenn eine Änderung basierend auf einer periodischen Überprüfung vorliegt.


     


    Revendications

    1. Un appareil d'instructions du serveur de destination de connexion (100) pour faire connecter un terminal du client (300), qui utilise le service d'un système pour fournir de service (400) comprenant une pluralité de serveurs, à un serveur spécifique dans la pluralité de serveurs, comprenant:

    un moyen d'acquisition de paramètres (102) configuré pour acquérir un paramètre du serveur sur chaque serveur de la pluralité de serveurs;

    des moyens d'acquisition de nom de zone (103, 104) configurés pour acquérir un nom de zone d'un emplacement du terminal du client (300) basés sur une demande de connexion reçue du terminal du client (300);

    un moyen de détermination de la destination de connexion (106); et

    un moyen d'instructions de la destination de connexion (107) configurés pour transmettre, au terminal du client (300), des informations du serveur spécifique déterminées par le moyen de détermination de la destination de connexion (106);

    caractérisés en ce que:

    le moyen de détermination de la destination de connexion (106) est configuré, lorsqu'une zone indiquée par le nom de zone appartient à une zone spécifique, pour considérer un ou plusieurs serveurs placés dans la zone spécifique de la pluralité de serveurs comme candidats du serveur spécifique, et à déterminer le serveur spécifique à partir de l'un ou plus serveurs qui sont les candidats en utilisant le paramètre du serveur acquis par le moyen d'acquisition de paramètres (102);

    le moyen de détermination de la destination de connexion (106) est configuré pour convertir chacun de la pluralité de paramètres du serveur y compris le risque régional à un résultat, et pour déterminer le serveur spécifique basé sur une somme de résultats, et

    le moyen de détermination de la destination de connexion (106) est configuré pour mettre à jour un résultat du risque régional lorsqu'il y a un changement basé sur une vérification périodique.


     
    2. L'appareil d'instructions du serveur de destination de connexion (100) selon la revendication 1, dans lequel, lorsque la zone indiquée par le nom de zone n'appartient pas à la zone spécifique, le moyen de détermination de la destination de connexion (106) considère tous les serveurs formant le système pour fournir de services (400) à être candidats du serveur spécifique.
     
    3. L'appareil d'instructions du serveur de destination de connexion (100) selon la revendication 1 ou 2, dans lequel le moyen d'acquisition de paramètre (102) acquiert, depuis le terminal du client (300), un paramètre du terminal qui est une pièce d'information sur une route entre le terminal du client (300) et chaque serveur, et le moyen de détermination de la destination de connexion (106) détermine le serveur spécifique depuis l'un ou plus serveurs qui sont les candidats en utilisant le paramètre du serveur et le paramètre du terminal.
     
    4. Un système d'utilisation de service y compris un appareil d'instructions du serveur de destination de connexion (100) pour faire connecter, un terminal du client (300) qui utilise un service d'un système pour fournir de services (400)
    y compris une pluralité de serveurs, à un serveur spécifique dans la pluralité de serveurs, et le terminal du client (300),
    le terminal du client (300) comprenant:

    un moyen d'acquisition de paramètre du terminal (303) configuré pour acquérir un paramètre du terminal qui est une pièce d'information sur une route entre le terminal du client (300) et chaque serveur; et

    un moyen de notification de paramètre (304) configuré pour notifier le paramètre du terminal à l'appareil d'instructions du serveur de destination de connexion (100),

    l'appareil d'instructions du serveur de destination de connexion (100) comprenant:

    le moyen d'acquisition de paramètres (102) configuré pour acquérir un paramètre du serveur sur chaque serveur de la pluralité de serveurs, et le paramètre du terminal;

    le moyen d'acquisition de nom de zone (103, 104) configuré pour acquérir un nom de zone d'un emplacement du terminal du client base sur une demande de connexion reçue du terminal du client (300);

    le moyen de détermination de la destination de connexion (106); et

    le moyen d'instruction de la destination de connexion (107) configuré pour transmettre des informations du serveur spécifique, déterminées par le moyen de détermination de la destination de connexion (106), au terminal du client (300);

    caractérisé en ce que:

    ledit moyen de détermination de la destination de connexion (106) est configuré, lorsqu'une zone indiquée par le nom de zone appartient à une zone spécifique, pour considérer un ou plus serveurs placés dans la zone spécifique dans la pluralité de serveurs à être candidats du serveur spécifique, et pour déterminer le serveur spécifique de l'un ou plus serveurs qui sont les candidats en utilisant le paramètre du serveur et le paramètre du terminal acquis par le moyen d'acquisition de paramètre (102); et

    le moyen de détermination de la destination de connexion (106) est configuré pour convertir le paramètre du terminal en un résultat, pour convertir chacun de la pluralité de paramètres du serveur y compris un risque régional en un résultat, et pour déterminer le serveur spécifique basé sur une somme de résultats, et

    le moyen de détermination de la destination de connexion (106) est configuré pour mettre à jour un résultat du risque régional lorsqu'il y a un changement basé sur une vérification périodique.


     
    5. Un programme pour faire fonctionner un ordinateur comme chaque moyen dans l'appareil d'instructions du serveur de destination de connexion (100) selon l'une quelconque des revendications 1 à 3.
     
    6. Une méthode d'instruction du serveur de destination de connexion exécuté par un appareil d'instructions du serveur de destination de connexion (100) pour faire connecter un terminal du client (300), qui utilise un service d'un système qui fournit de services (400) y compris une pluralité de serveurs, à un serveur spécifique dans le pluralité de serveurs, comprenant:

    une étape d'acquisition de paramètres (S201; S301, S302) d'acquérir un paramètre du serveur sur chaque serveur de la pluralité de serveurs;

    une étape d'acquisition de nom de zone (S203) d'acquérir un nom de zone d'un emplacement du terminal du client (300) basé sur d'une demande de connexion reçue du terminal du client (300);

    une étape de détermination de la destination de connexion (S206); et

    une étape d'instruction de la destination de connexion (S208) consistant à transmettre des informations du serveur spécifique, déterminées par l'étape de détermination de la destination de connexion (S206), au terminal du client (300);

    caractérisée en ce que:

    l'étape de détermination de la destination de connexion (S206) comprend, lorsqu'une zone indiquée par le nom de zone appartient à une zone spécifique, considérant un ou plus serveurs dans la zone spécifique dans la pluralité de serveurs à être des candidats du serveur spécifique, et
    la détermination du serveur spécifique depuis l'un ou plus serveurs qui sont les candidats en utilisant un paramètre du serveur acquis par l'étape d'acquisition de paramètres (S201, S301, S302);

    dans lequel, à l'étape de détermination de la destination de connexion (S206), l'appareil d'instructions du serveur de destination de connexion (100) convertit chacun de la pluralité de paramètres du serveur y compris un risque régional en un résultat, et détermine le serveur spécifique basé sur une somme de résultats, et

    dans lequel un résultat du risque régional est mis à jour lorsqu'il y a un changement basé sur une vérification périodique.


     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description