JP3972999B2 - Distributed network system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a large-scale network system, and more particularly to a distributed network system in a company having a large number of offices throughout Japan or around the world.
[0002]
[Prior art]
Conventionally, in a company having a large number of offices, information is managed for each office. However, in this form of information management, various decisions cannot be made quickly based on information in each office. Thus, information could not be used effectively.
[0003]
Therefore, it was considered to install a mainframe computer in the information center of the company, connect it to the computer of each office via a line, and immediately collect the information of each office in the information center. Such a conventional technique is described in Japanese Patent Laid-Open No. 7-56795 (Reference 1). This prior art also discloses a technique for distinguishing access to general business information and individual business information.
[0004]
A system for investigating user terminals that use the network illegally is described in Japanese Patent Laid-Open No. 8-106436 (Reference 2).
[0005]
Further, a method for managing user IDs using a network is described in Japanese Patent Application Laid-Open No. 8-255133 (Reference 3).
[0006]
[Problems to be solved by the invention]
However, in a centralized system as described in JP-A-7-56795, information that does not need to be collected in an information center, for example, information that is sufficient to be transferred from one office to another is sufficient. , Will be collected in the information center. For this reason, communication lines are congested and communication waiting frequently occurs. Also, when using a public line, the line usage fee becomes a problem.
[0007]
Furthermore, in the above Reference 1, the access right to the general business information and the individual business information is distinguished, but the access right is distinguished using both the user ID and the terminal used. Therefore, even if the user ID is correct, there is an inconvenience that the individual business information cannot be accessed if the terminal is different.
[0008]
In addition, the network system described in Japanese Patent Laid-Open No. 8-106436 (Reference 2) also investigates user terminals that use the network by a security server provided in the information center. For this reason, in a wide area network, communication between the center and the network becomes a problem. This is because the information of the transmission source is not sufficiently managed when logging in from one network to another network.
[0009]
Further, the user ID management method in the distributed server system described in JP-A-8-255133 (Reference 3) also requires a center server as a center unit.
[0010]
The figure shows the system of Reference 3. Distributed media servers # 1- # 3 hold ID management information. Media servers # 1- # 3 are connected to the center server # 0. The center server # 0 periodically asks the media servers # 1- # 3 about ID management information. When there is addition, change, or deletion of ID management information in any of the media servers # 1- # 3, for example, when a user ID is newly registered, the ID management information is first sent from the media server to the center server # 0. Sent. The center server # 0 further transmits the user ID newly registered previously to a media server other than the media server to which the ID management information is newly registered periodically. Thus, the newly registered user ID is reflected in all media servers # 1- # 3.
[0011]
However, this Reference 3 also requires a center unit, and the configuration of the network system is complicated. In addition, traffic jam is likely to occur on the communication line, and the cost is high.
[0012]
Accordingly, an object of the present invention is to provide a distributed network system in which user ID information can be managed without having a central unit.
Another object of the present invention is to provide a distributed network system in which transmission data is transferred to a desired area using an area code assigned to a user ID as transmission destination information.
Still another object of the present invention is to provide a distributed network system that can set an access right for transmission data by using a user classification code assigned to a user ID as transmission destination information.
[0013]
[Means for Solving the Problems]
According to the present invention, a distributed network system includes a plurality of main servers provided in each of a plurality of areas and connected by communication lines, and an area code is assigned to each of the plurality of areas. A plurality of sub-servers connected to each of the main servers and a plurality of communication terminals connected to each of the plurality of sub-servers, the communication data indicating a destination to which the communication data is to be transmitted A user ID as destination information, and the user ID includes an area code assigned to the area to which the destination user belongs, and each of the plurality of main servers includes an area code in the destination information. When it is different from the area code of the area to which the server belongs, the area specified by the area code in the destination information Relaying the communication data to the main server, and when the area code in the destination information is the same as the area code of the area to which the main server belongs, among the plurality of sub-servers connected to the main server The communication data is transferred to at least one destination sub-server so that a user can access the communication data by the communication terminal connected to the destination sub-server as a belonging communication terminal. And
[0014]
The destination information further includes a sub server code, and each main server communicates with the destination sub server specified by the sub server code among the plurality of sub servers in the area to which the main server belongs. Transfer data.
[0015]
The destination information includes a user classification code indicating an access right assigned to the destination user. When the user accesses the destination subserver from the communication terminal to which the user belongs, the destination subserver is assigned to the user. When it is determined that the user has a valid access right by comparing the access right based on the user classification code in the user ID with the access right based on the user classification code included in the destination information, the communication data Allow access.
[0016]
Each subserver manages user ID information including a user ID of a user who uses any of a plurality of communication terminals connected to each subserver, and newly registers and deletes a user ID for the user. The main server to which the sub server is connected is notified of new registration, deletion, and change of the user ID, and the main server is connected to each of the plurality of main servers. User ID information including the user ID of a user who uses any of the plurality of communication terminals connected to each of the sub-servers, and notification of new registration, deletion, and change of the user ID from each of the sub-servers When received, new registration, deletion, and change are made for the user ID information held by itself, and other New registration of the user ID to the down server, delete, notify the change.
[0017]
When each sub-server receives an access request from any user not registered in each sub-server via any of the communication terminals, the user's user is connected to the main server to which each sub-server is connected. When the main server determines that the user ID is a user ID registered in another sub server, the main server sends the user ID to the user from the other sub server in which the user ID is registered. 5. The network system according to claim 4, wherein the communication data is read out and transferred to each of the sub servers that received the access request.
[0018]
Each main server refers to user ID information to determine whether the destination of communication data from the sub-server is correct, and transmits the communication data to the destination when the destination is correct, and transmits when the destination is incorrect The network system according to claim 4, wherein the refusal is notified to the sub server.
[0019]
Each sub-server refers to the user ID information of each main server and provides it to the communication terminal according to the input destination condition.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a distributed network system according to the present invention will be described in detail with reference to the accompanying drawings.
[0021]
FIG. 1 is a block diagram showing a configuration of a network system according to the first embodiment of the present invention. Referring to FIG. 1, communication bases around the world are divided into Japan area (A), laboratory area (B), Asia area (C), Europe area (D), and America area (E). . Although not limited to these areas, these areas are mainly divided on the basis of physical areas. Each area consists of a plurality of sub-areas. Sub-areas correspond to factories, laboratories, administrative departments, etc. That is, each area is divided into sub-areas based on the physical meaning in a certain sense and based on the type of information.
[0022]
Each area has a main server. That is, the main servers 1A, 1B, 1C, 1D, and 1E are distributed in the Japan area (A), the laboratory area (B), the Asian area (C), the European area (D), and the American area (E), respectively. Are arranged. As described above, the network system according to the first embodiment of the present invention does not have a center unit for managing data communication and user ID information.
[0023]
In each area, a plurality of sub-servers corresponding to communication bases are distributed below the main server. For example, taking Japan area (A) as an example, three sub-servers 2A-1, 2A-2, 2A-3 are distributed under the main server 1A. The same applies to other areas. A plurality of communication terminals are connected under each sub-server. For example, 3A-1-1, 3A-1-2, and 3A-1-3 are connected under the sub server 2A-1. The same applies to other sub-servers.
[0024]
Between main servers 1A and 1B, between 1B and 1C, between 1C and 1D, between 1D and 1E, and between 1E and 1A are connected by communication lines 4AB, 4BC, 4CD, 4DE, and 4EA, respectively. . These communication lines allow communication between main servers as indicated by the dotted lines in FIG. These communication lines and the communication line between the sub server and the main server are communication lines adopting a charging system. Therefore, these communication lines need to be used effectively.
[0025]
Each main server performs management of the capacity of all resources of the information system under the area, adjustment between sub servers, management of user ID information, and the like. Further, the sub server approves, issues, deletes, etc. a user ID related to the arranged communication terminal.
[0026]
In the distributed network system shown in FIG. 1, for example, when the user 5B in the laboratory area (B) communicates with the user 5E in the American area (E), the communication terminal 3B-1-1, the sub server 2B-1, Data is transmitted through the main server 1B, the communication line 4AB, the main server 1A, the communication line 4EA, the main server 1E, the sub server 2E-1, and the communication terminal 3E-1-1.
[0027]
Each main server has user ID information as shown in FIG. The user ID information is composed of five area parts corresponding to the Japan area (A), the laboratory area (B), the Asian area (C), the European area (D), and the American area (E). Each area part is composed of a sub-area part provided for each of a plurality of sub-servers connected to the main server. Each subarea unit stores information about users who use a plurality of communication terminals connected to the corresponding subserver.
[0028]
For example, the main server 1A in the Japan area (A) includes a Japan area section, a laboratory area section, an Asia area section, a European area section, and an American area section. The Japan area portion for the Japan area to which the main server 1A belongs is composed of sub-area portions 12A-1, 12A-2, and 12A-3 corresponding to the sub-servers 2A-1, 2A-2, and 2A-3. Each sub-area part consists of a user ID and a password assigned to each user who uses the sub-server. The area portions for areas other than the Japan area have the same structure, and each sub area portion stores only the user ID of each user who uses the corresponding sub server.
[0029]
As shown in FIG. 3, each sub-server holds the same user ID information as the area part for the area to which the main server to which it is connected belongs.
[0030]
As shown in FIG. 4, when data is transmitted, the communication data includes transmission destination information, transmission source information, and the data. The user ID is used as transmission destination information and transmission source information when communicating data. The source information is not rewritten until it reaches the destination. As a result, the main server, sub server, and communication terminal that are the transmission source of the communication data can be specified. After the data is sent, the user ID is also used to view the data.
[0031]
As shown in FIG. 5, the user ID includes a name field, a user division field, a sub server division field, and an area division field.
[0032]
In the name field, the name of the user is written.
[0033]
In the user classification field, a user classification code indicating an access right to received data and other management information is set. For example, full-time employees, joint developers from other companies, or temporary employees are mixed in the laboratory. When they can operate the same communication terminal, the user classification code stores a code used to limit who can access the information in order to keep the information secret. It is also used to restrict access to data that should not be publicly disclosed, such as personnel data, purchase data, and project data, even by the same regular employee.
[0034]
In the sub server classification field, the identification code of the sub server to which the communication terminal operated by the user is connected is written. As a result, the user is not managed by a sub server other than the sub server to which the user belongs. In other words, services cannot be received from other sub-servers.
[0035]
In the area classification field, the identification code of the main server to which the sub server to which the user belongs is connected is written.
[0036]
When "*" (asterisk) is written in the name field in the destination information, the communication data is sent to the sub server specified by the sub server classification code, and the user registered in the sub server is registered. Among them, an authorized user can view the communication data according to the user classification code.
[0037]
When “*” is written in the user classification field in the transmission destination information, the communication data is transmitted to the sub server specified by the contents of the sub server classification field of the transmission destination information. The user registered in the sub server can view this communication data regardless of the user category.
[0038]
In the transmission destination information, when “*” is written in the sub server classification field, the communication data is transmitted to all the sub servers in the area designated by the contents of the area classification field. Among the users registered in any of the sub-servers, a user who is permitted according to the user classification code can view the communication data.
[0039]
In the transmission destination information, when “*” is written in the area classification field, the communication data is transmitted to all areas and transmitted to all sub servers. Among the users registered in any of the sub-servers, a user who is permitted according to the user classification code can view the communication data.
[0040]
Next, the operation of the network system according to the first embodiment will be described with reference to the drawings.
[0041]
First, with reference to FIG. 6, processing for registering, changing, and deleting a user ID will be described. In step S2, the user 5B in the laboratory area (B) requests the corresponding sub server 2B-1 to register his user ID from the communication terminal 3B-1-1. Alternatively, the user requests to change or delete his / her user ID. This processing may be performed by each user as described above, or may be performed by a management department.
[0042]
In step S4, the sub server 2B-1 refers to the held user ID information and checks double registration. This double registration is performed to determine whether or not the user ID has already been registered. For example, if the sub server used is different, it is recognized as another user ID. If it is determined that the user ID is not double registration, it is determined whether or not the request is new registration. If it is determined that the registration is new, the sub-server 2B-1 requests input of a personal identification number.
[0043]
In step S6, the user inputs a password.
[0044]
When it is determined in step S4 that it is not a new registration of a user ID, and when a personal identification number is input in step S6 for new registration, a request is executed in step S7. In other words, in the case of new registration of a user ID, the entered password is stored in the sub server 2B-1 as a sub area part as user ID information together with the user ID. In the case of changing or deleting the user ID information, the corresponding user ID information stored in the sub server 2B-1 is changed or deleted. In the case of deletion, the password is also deleted.
[0045]
Subsequently, in step S8, the sub server 2B-1 notifies the main server 1B of new registration, change, and deletion of the user ID information.
[0046]
In step S10, the main server 1B issues a user ID notification by broadcast communication. Each main server other than the main server 1B updates the held user ID information in response to the user ID notification. That is, in the case of new registration of a user ID, the newly registered user ID is added to the sub-area part of the area part corresponding to the main server that issued the user ID notification. When the contents of the user ID are changed, the user ID in the corresponding user ID information of the sub-area part held according to the change is changed. In the case of deleting the user ID, the corresponding user ID in the user ID information of the sub-area part held is deleted.
[0047]
For example, when a new user ID is registered in the sub server 2B-1 from the communication terminal 3B-1-1 in the laboratory area (B), the main server 1B notifies the other main server of the user ID notification. When the main server 1A receives the user ID notification, the main server 1A adds the user ID in the user ID notification to the held user ID information. Thereafter, the user ID notification is transferred to the main server 1E in the America area (E). The main server 1E transmits the user ID notification to the next main server in the same manner as described above. In this way, user ID information held in all main servers is updated. The user ID notification may be performed each time a new registration, change, or deletion of a user ID occurs, or may be performed when a certain number is collected or at regular intervals.
[0048]
Next, the case of transmitting data will be described with reference to FIG. For example, the case where the user 5B having the user ID registered in the sub server 2B-1 in the laboratory area (B) transmits data to the user B having the user ID in the sub server 2E-1 in the US area (E). Take an example.
[0049]
In step S12, the user 5B operates the communication terminal 3B-1-1 and inputs its own user ID. The communication terminal 3B-1-1 transfers the user ID to the sub server 2B-1. In step S14, the sub server 2B-1 refers to the held user ID information and determines whether or not the transferred user ID is correct. If it is determined that it is not correct, this is notified to the communication terminal. In response to this, the communication terminal 3B-1-1 refuses access.
[0050]
When it is determined that the user ID is correct, the communication terminal 3B-1 requests input of a recitation number. In response to this, in step S16, the user inputs a personal identification number. Communication terminal 3B-1-1 transfers the recitation number to sub-server 2B-1. In step S18, the sub server 2B-1 refers to the held user ID information and determines whether or not the transferred recitation number is correct. When it is determined that it is not correct, this is notified to the communication terminal 3B-1-1. In response to this, the communication terminal 3B-1-1 refuses access.
[0051]
When it is determined that both the user ID and the recitation number are correct, the communication terminal requests input of transmission destination information and data. In step S20, the user inputs transmission destination information and data. When the transmission destination information and data are input, the communication terminal 3B-1-1 completes the communication data by adding the transmission destination information and the user ID of the user 5B as the transmission source information to the data. The transmission destination information and the transmission source information have the same format as the user ID. That is, it has a name field, a user division field, a subserver division field, and an area division field. The communication terminal 3B-1-1 transfers the completed communication data to the sub server 2B-1.
[0052]
In step S <b> 22, the sub server 2 </ b> B- 1 determines whether or not the transmission source information of the communication data is correct with reference to the held user ID information. When it is determined that the communication data is not correct, the communication data is discarded and the communication terminal 3B-1-1 is notified of the fact. When the transmission source information is correct, the company name “HONDA” is added to the transmission destination information and the transmission source information to complete the transmission destination information and the transmission source information, and the communication data is transferred to the main server 1B.
[0053]
When the communication data is received, in step S24, the main server 1B searches the stored user ID information to determine whether the transmission destination information is correct. When it is determined that the transmission destination information is not correct, the communication data is discarded. In addition, the communication Tamatsu 3B-1-1 is notified via the sub server 2B-1 that the transmission destination information is not correct. When it is determined that the transmission destination information is correct, the optimum communication line is selected based on the transmission destination information. The optimum communication line is determined by the communication fee, communication time, and the like. In this example, communication data is transmitted from the main server 1B in the laboratory area (B) to the main server 1E in the American area (E) via the main server 1A in the Japanese area (A).
[0054]
In step S26, when the main server 1A in the Japanese area (A) receives the communication data, the main server 1A checks the area classification code in the transmission destination information, and the communication data is addressed to any sub-server in the area. It is determined whether or not.
If the main server 1A in the Japanese area (A) determines that the communication data is addressed to a user in the area, the main server 1A stores the communication data in a buffer (not shown) in step S30. Thereafter, the communication data is transferred to the destination subserver according to the subserver classification code.
[0055]
If it is determined in step S28 that the communication data is addressed to a user in another area, the main server 1A uses the optimum communication line to specify the communication data in the area specified by the area classification code in step S28. Send to the destination main server. In this example, the communication data is transferred to the American area (E).
[0056]
In this case, the main server 1A in the Japanese area (A) only checks the transmission destination information and does not process the transmission source information. Therefore, the transfer process can be performed in a short time. Also, the transmission source information is not rewritten accidentally or intentionally.
[0057]
The main server 1A may add the code of the main server 1A to the communication data. Thereby, it is possible to confirm on which route the communication data is transmitted. Even in this case, the transmission source information is not rewritten.
[0058]
The main server 1E in the American area (E) receives the communication data, determines in step S28 that the communication data is addressed to its own area from the communication destination information, and stores it in a buffer (not shown). Thereafter, in step S30, the sub server section field in the communication destination information is viewed, and communication data is output to the sub server 2E-1 designated by the sub server section section. The sub server 2E-1 holds the received communication data.
[0059]
Next, an operation for browsing user communication data will be described with reference to FIG.
[0060]
In step S32, the user 5E operates the communication terminal 3E-1-1 and inputs its own user ID. The user ID may be input by key operation or by reading the user ID recorded on the data recording card. The communication terminal 3E-1-1 transfers the user ID to the sub server 2E-1. In step S34, the sub server 2E-1 refers to the held user ID information and determines whether or not the transferred user ID is correct. When it is determined that it is not correct, this is notified to the communication terminal 3E-1-1. In response to this, the communication terminal 3E-1-1 refuses access.
[0061]
When it is determined that the user ID is correct, the communication terminal 3E-1-1 requests input of the recitation number. In response, in step S36, the user enters a personal identification number. Communication terminal 3E-1-1 transfers the recitation number to sub-server 2E-1. In step S38, the sub server 2E-1 refers to the held user ID information and determines whether or not the transferred recitation number is correct. If it is determined that it is not correct, this is notified to the communication terminal. In response to this, the communication terminal 3E-1-1 refuses access.
[0062]
When it is determined that both the user ID and the recitation number are correct, the sub server 3B-1 stores the user classification code in the user ID input from the communication terminal 3E-1-1 and stored in step S40. The communication data is selectively transmitted to the communication terminal 3E-1-1 by comparing with the user classification code in each communication destination information of the communication data. The communication terminal 3E-1-1 displays the received communication data. That is, the communication data is transferred from the sub server 2E-1 to the communication terminal 3E-1-1 and displayed according to the access right permitted to the input user ID.
[0063]
In this way, the communication data is stored in the sub server, and the user ID and password are also stored in the sub server. Therefore, when access to the communication data occurs, the sub server needs to make an inquiry to the main server. There is no. Furthermore, the user can view necessary information from any terminal as long as the user is within the sub-area managed by the sub-server. For example, even if a user moves from a certain section of a certain communication terminal to a certain section of another communication terminal due to a personnel change, if the sub-server is arranged to supervise that section, it is necessary to change the user ID information Absent. Therefore, management of user ID information is easy.
[0064]
In the above operation, the communication data is completed by adding the transmission source information and the transmission destination information to the data, but it may further have a field in which the identifier of the transmission source communication terminal is written. Thereby, the transmission source communication terminal can be confirmed and specified, and unauthorized entry into the network can be prevented.
[0065]
Next, a network system according to the second embodiment of the present invention will be described.
[0066]
In the network system according to the second embodiment, when a user communicates data, user ID information held in the main server is referred to by the sub server.
[0067]
In the first embodiment, transmission destination information is input by the user 5B. However, since the user ID as transmission destination information is long, it is inconvenient to input. Therefore, when data is to be transmitted, a transmission destination condition is input from the communication terminal together with the transmission source information and data. The transmission destination condition includes, for example, an individual name of the destination, a base name, an area, and the like.
[0068]
That is, referring to FIG. 9, in step S42, the user 5B operates the communication terminal 3B-1-1 and inputs his / her user ID. The communication terminal 3B-1-1 transfers the user ID to the sub server 2B-1. In step S44, the sub server 2B-1 refers to the held user ID information and determines whether or not the transferred user ID is correct. If it is determined that it is not correct, this is notified to the communication terminal. In response to this, the communication terminal 3B-1-1 refuses access.
[0069]
When it is determined that the user ID is correct, the communication terminal 3B-1 requests input of a recitation number. In response to this, in step S46, the user inputs a personal identification number. Communication terminal 3B-1-1 transfers the recitation number to sub-server 2B-1. In step S48, the sub server 2B-1 refers to the stored user ID information and determines whether or not the transferred recitation number is correct. When it is determined that it is not correct, this is notified to the communication terminal 3B-1-1. In response to this, the communication terminal 3B-1-1 refuses access.
[0070]
When it is determined that both the user ID and the recitation number are correct, the communication terminal 3B-1-1 requests the destination condition and data input. In step S50, a destination condition is input. For example, when the United States is designated as the area, the United States area classification code is selected. Also, enter the name of the destination user. Suppose you don't know the subserver. Thus, the input destination condition is sent to the sub server 2B-1.
[0071]
In step S52, the sub server 2B-1 sends the destination condition to the main server 1B, and inquires the user ID of the destination that matches the condition. The main server 1B searches the held user ID information and sends a user ID that matches the destination condition to the communication terminal 3B-1-1 via the sub server 2B-1.
[0072]
When there are a plurality of user IDs that match the destination condition, the user selects an appropriate destination condition from them. Thus, the transmission destination information is determined in step S54.
[0073]
Next, a distributed network system according to a third embodiment of the present invention will be described.
In the third embodiment, communication data browsing is permitted in response to a communication data browsing request from a user other than the user managed by the sub server.
[0074]
For example, in the first embodiment, when the user 5E is temporarily moved to the sub area of the sub server 2E-2, a request for browsing communication data is generated from the user 5E via the communication terminal 3E-2-1. Suppose that
[0075]
Referring to FIG. 10, in step S62, user 5E inputs his / her user ID and recitation number from communication terminal 3E-2-1.
[0076]
In step S34, the sub server 2E-2 confirms the user ID by referring to the user ID information held by the input user ID. In this example, when determining that the user ID is an unmanaged user, the sub server 2E-2 inquires the main server 1E in step S62. In response to the inquiry from the sub server 2E-2, the main server 1E refers to the held user ID information and checks the validity of the user ID. If it is determined that the user ID is valid, a response to that effect is sent to the sub server 2E-2.
[0077]
In step S66, the sub server 2E-2 requests input of a personal identification number based on the response. When the personal identification number is input to the communication terminal 3E-2-1, the sub server makes an inquiry to the main server 1E in the same manner as in the case of the user ID. If it is determined in step S68 that the password is not correct, the request is discarded. If there is a response from the main server 1E to the sub server 2E-2 that the password is correct, the sub server 2E-2 issues a communication data transfer request to the main server 1E in step S70.
[0078]
The main server 1E reads the communication data from the sub server corresponding to the sub server classification code in the user ID for which transfer is requested. The read communication data is only the communication data that the user has the right to view from the user classification code and name code in the user ID in the transfer request, and the user classification code and name code in each communication data. Transfer to sub-server 2E-2. The sub server 2E-2 displays the received communication data. Thereby, the user 5E can browse the communication data even if the user 5E moves temporarily within the area.
[0079]
【The invention's effect】
As described above, according to the present invention, a distributed network system capable of managing user ID information without having a central unit is provided.
[0080]
Further, transmission data can be transferred to a desired area or sub-area by using an area classification code and sub-server classification code assigned to the user ID as transmission destination information. At this time, since the transmission source information is not rewritten, the transmission source can be confirmed immediately. Further, if there is room in the storage area of the main server, the communication data may be stored in both the sub server and the main server. Then, even if the user moves from one subserver jurisdiction subarea to another subserver jurisdiction subarea, communication data can be browsed more easily.
[0081]
Furthermore, since the access right for the transmission data is set using the user classification code assigned to the user ID as the transmission destination information, the access right can be easily managed.
Even if the user ID of the transmission destination user is not known, the transmission destination information can be completed by appropriately selecting the destination condition, so that the operation of the communication terminal is facilitated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a distributed network system of the present invention.
FIG. 2 is a diagram showing user ID information held by a main server.
FIG. 3 is a diagram showing user ID information held by a sub server.
FIG. 4 is a diagram showing a format of communication data.
FIG. 5 is a diagram showing a format of a user ID.
FIG. 6 is a flowchart showing an operation when registering, changing, or deleting a user ID.
FIG. 7 is a flowchart showing an operation when transmitting communication data in the distributed network system according to the first embodiment of the present invention;
FIG. 8 is a flowchart showing an operation when browsing communication data in the first embodiment of the present invention.
FIG. 9 is a flowchart showing an operation for easily creating transmission destination information in the distributed network system according to the second embodiment of the present invention;
FIG. 10 is a flowchart showing an operation when a user views communication data from a sub server other than a managed sub server in the distributed network system according to the third embodiment of the present invention.
FIG. 11 is a diagram showing a conventional distributed network system and ID management information.
[Explanation of symbols]
1A, 1B, 1C, 1D, 1E: Main server
2A-1 to 2A-3, 2B-1 and 2B-2, 2C-1, 2C-2,
2D-1 to 2D-3, 2E-1, 2E-2: Subserver
3A-1-1 to 3A-3-3, 3B-1-1 to 3B-2-2, 3C-1-1 to 3C-2-3, 3D-1-1 to 3D-3-3, 3E- 1-1 to 3E-2-2: communication terminal
4AB, 4BC, 4CD, 4DE, 4EA: communication line
12-A to 12-E: User ID information

Claims (7)

Provided each of the plurality of areas, and a plurality of main servers connected to each other by a communication line, to each of the plurality of areas have assigned area code,
A plurality of sub-servers connected to each of the plurality of main servers in a corresponding area of the plurality of areas ;
A plurality of communication terminals connected to each of the plurality of sub-servers in the corresponding area ;
Each of the sub-servers manages user ID information of a plurality of users in the corresponding area as a set of user ID information,
Each main server manages the set of user ID information across the plurality of areas ,
Communication data includes a destination user ID information indicating a destination to the communication data is transmitted,
The user ID information includes an area code assigned to the area to which the destination user belongs,
Source main server of the plurality of main server where the source user belongs, when the area code in the destination user ID information is different from the area code of the transmission area in which the original main server belongs, in the destination user ID information When the communication data is transmitted to a destination main server belonging to the area specified by the area code of the destination , and the area code in the destination user ID information is the same as the area code of the area to which the source main server belongs, the transmission source and transferring the communication data to at least one destination sub servers of the plurality of sub-servers connected to the main server, the communication terminal that the user is connected to the destination sub-server as belonging communication terminal Makes it possible to access the communication data. Distributed network system. The destination information further includes a sub server code,
The source main server transfers the communication data to the destination subserver specified by the subserver code among the plurality of subservers in the area to which the source main server belongs. Distributed network system. The destination user ID information includes a user classification code indicating the assigned access right to the destination user,
When the destination user accesses the destination sub-server from the affiliated communication terminal, the destination sub-server accesses the access right based on the user classification code in the destination user ID information assigned to the destination user, and the communication data When the destination user determines that the destination user has a valid access right by comparing the access right according to the user classification code included in the destination user ID information, the access to the communication data by the destination user The distributed network system according to claim 1 or 2, which permits New registration of the user ID information for the previous Symbol user, delete, carried out the changes, and new registration of the user ID information to the main server to each of the sub-server is connected, delete, inform the change,
Each of the main server, before Symbol new registration of the user ID information from each of the sub-server, delete, when receiving the news of the change, the new registered for the user ID information by itself to hold, delete, make the changes, also, other distributed network system of the new registration of the user ID information to the main server, deleted, according to any one of claims 1 to 3 inform changes. When each sub-server receives an access request from a user who is not registered in each sub-server via one of the communication terminals, the user of the user is connected to the main server to which the sub-server is connected. Query ID information ,
The main server, the user ID information when it is determined that the user ID information registered in the other sub-servers, addressed from the other sub-servers that the user ID information is registered in the user communication 5. The distributed network system according to claim 4, wherein data is read out and transferred to each of the sub servers that have received the access request. The source main server, said with reference to the set of user ID information to determine the or destination of the communication data is correct from the source sub-server, the communication data transmitted to the destination when the destination is correct 5. The distributed network system according to claim 4, wherein when the destination is not correct, the transmission sub server is notified of transmission refusal. The source sub-server according to the destination conditions input, distributed network of claim 4 that provides the user ID information to the transmitting the user ID with reference to the source communication terminal a set of information of the original main server system.

Images