JP2004054833A - Server, client, and client server system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a client server system capable of appropriately sharing data. <P>SOLUTION: In a client data management system 20a included in a first client, when data is newly created by the first client (S101), on the basis of importance and classification information set along with the data (S102), the time to reflect the data in the server is set (S104). In accordance with the time, the new data and information such as the importance are sent to the server (S105). In the server data management system 10 included in the server, the time to reflect the data in a second client sharing the data is set in the same way (S107), and in accordance with the time, the new data and the information such as the importance are sent to the second client (S108). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a server, a client, and a client server system, and more particularly, to a server, a client, and a client server system capable of sharing appropriate data.
[0002]
[Prior art]
In a conventional client-server system, as a method of mutually reflecting an update result on data held by both a server and a client, a system user performs an operation of reflecting an update result, thereby performing mutual operation at that time. There was a method of comparing data and transmitting and receiving different parts to each other.
[0003]
Japanese Patent Application Laid-Open No. 2000-82006 proposes an information backup system that monitors the time at which data in a server or a client is accessed, and matches the data based on the time information.
[0004]
In Japanese Patent Application Laid-Open No. 6-46161, a message is presented to a receiver in a message communication between a plurality of terminals, in consideration of the urgency specified at the time of creation of the message by the sender and the work status of the receiver. A communication method capable of controlling the timing and presentation form of the communication has also been proposed.
[0005]
[Problems to be solved by the invention]
However, such a conventional technique has a problem in that data updated in one of the client and the server is not reflected on the other until a user of the system performs an operation.
[0006]
In addition, at the time of updating, data is transmitted and received so as to match all different portions as a result of the comparison, so that useless communication traffic is generated due to updating of insignificant data such as infrequently used data. There was also a problem. For example, in the information backup system disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2000-82006, data is matched only based on the access time of data. Irrespective of this, the communication for reflecting the update is performed in order to match the data. Therefore, there is a problem that useless communication traffic is generated.
[0007]
Further, in the communication system disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-46161, in a communication system for exchanging messages, only data with low urgency is transmitted at the start of data transmission according to the congestion degree of the communication path. Buffer. As a result, the data transmission is controlled, so that there is a problem that the transmission time cannot be controlled before the start of data transmission for all data. In addition, regardless of the urgency, the entire created data is always transmitted from the transmitting side to the receiving side, so by means such as transmitting only a part such as a summary part of the data according to the importance of the data, There is a problem that useless communication traffic cannot be suppressed.
[0008]
The present invention has been made in view of these problems, and an update result for data can be mutually reflected between a server holding data and a client holding a copy of the data. It is an object of the present invention to provide a server, a client, and a client-server system capable of sharing data.
[0009]
[Means for Solving the Problems]
To achieve the above object, according to an aspect of the present invention, a server includes a data storage unit that stores data and the importance of the data, and a server that reflects updated data based on the importance of the stored data. Update data communication means for determining the time and updating the data to the client.
[0010]
According to another aspect of the present invention, the client is a client that stores data in the server and holds a copy of the data stored in the server, and a data storage unit that stores the data and the importance of the data. Update data communication means for determining the reflection time of the updated data based on the importance of the data to be updated and updating the data to the server.
[0011]
According to another aspect of the present invention, a client-server system is a client-server system that includes a server that stores data and a client that holds a copy of data stored in the server, and that communicates with each other. And data storage means for holding data and data importance in the client, and update data communication means for determining a reflection time of updated data based on the importance of the held data and reflecting the data update. Is provided.
[0012]
In addition, it is desirable that the client server system further includes an importance level editing unit that enables a user to arbitrarily edit the importance level of the data stored in the data storage unit.
[0013]
Further, it is desirable that the client server system further includes an importance changing unit that dynamically changes the importance of the data held in the data storage unit according to time.
[0014]
Further, it is preferable that the above-mentioned data storage unit further includes importance determining means for holding the classification information of the data and determining the importance of the updated data based on the held classification information.
[0015]
Further, the above-mentioned data storage means includes a keyword extraction means for extracting a keyword from the data, a correspondence table between the keyword and importance for determining the importance of the data based on the extracted keyword, and a correspondence table based on the correspondence table. It is desirable to further include an importance search means for determining the importance of the data.
[0016]
Further, the above-mentioned data storage means includes a keyword extraction means for extracting a keyword from the data, a correspondence table between the keyword and the classification for determining the classification of the data based on the extracted keyword, and a data table based on the correspondence table. It is preferable to further include a classification determining unit that determines a classification.
[0017]
Further, the above-mentioned data storage unit holds timer information for specifying a time to reflect the update of data, and the above-mentioned update data communication unit reflects the update data at the specified time based on the timer information. Is desirable.
[0018]
Further, the data storage means described above further includes update information communication means for holding update information indicating that data has been updated, and transmitting and receiving update information based on a change in the state of the client. It is desirable to reflect the data update based on the update information.
[0019]
Further, the data storage means described above further includes update information communication means for holding update information indicating that data has been updated, and transmitting and receiving update information based on the importance of the data. It is desirable to reflect the data update based on the update information.
[0020]
Further, it is desirable that the update information communication means transmits and receives update information based on a change in the state of the client.
[0021]
Further, it is preferable that the data storage unit further includes an update information generation unit that generates update information based on the updated data in accordance with the importance of the updated data.
[0022]
Further, it is desirable that the above-mentioned update information generating means generates the update information according to one of the updated data capacity and the communication status between the server and the client.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are the same. Therefore, detailed description thereof will not be repeated.
[0024]
FIG. 1 is a block diagram showing a configuration of a client server system according to an embodiment of the present invention.
[0025]
Referring to FIG. 1, a client server system according to the present embodiment includes a server including a server data management system 10 for storing user data, and a plurality of clients used by the user. And a plurality of clients including the systems 20a, b, c, and d. In the following description, the client data management systems 20a, b, c, and d included in a plurality of clients will be referred to as client data management systems 20.
[0026]
Next, FIG. 2 is a block diagram showing a configuration of the server data management system 10 shown in FIG.
[0027]
Referring to FIG. 2, server data management system 10 included in the server is a data management system that stores data used by clients on the server, and includes, as storage areas, data storage area 102 that stores data itself, An importance storage area 103 for storing data importance, a classification information storage area 104 for storing data classification information, a timer information storage area 105 for storing data timer information, and an update for storing data update information And an information storage area 106.
[0028]
The server data management system 10 further includes a correspondence table 107 for associating the data classification information with the data importance, and an importance determination unit 108 for determining the data importance from the data classification information based on the correspondence table 107. A keyword extracting unit 109 for extracting a keyword from the data; a correspondence table 110 for associating the keyword extracted by the keyword extracting unit 109 with the importance of the data; and an important table for determining the importance of the data based on the correspondence table 110. A degree search unit 111, a correspondence table 112 for associating keywords extracted by the keyword extraction unit 109 with data classification information, and a classification determination unit 113 for determining data classification based on the correspondence table 112 are provided.
[0029]
Further, the server data management system 10 includes an update data communication unit 114, an update information communication unit 115, an update information generation unit 116, and a client management unit 117.
[0030]
The update data communication unit 114 determines the reflection time of the updated data based on the importance of the data stored in the importance storage area 103 or the timer information of the data stored in the timer information storage area 105, and And sends the data to the client. Further, the update data communication unit 114 receives the updated data transmitted by the client.
[0031]
The update information communication unit 115 transmits update information of the data stored in the update information storage area 106 to the client based on the importance of the data stored in the importance storage area 103. Further, the update information communication unit 115 receives the update information transmitted by the client.
[0032]
The update information generation unit 116 generates update information for the update information communication unit 115 to transmit to the client based on the updated data stored in the data storage area 102.
[0033]
The client management unit 117 uses the server data management system 10 to manage clients that store data in the server data management system 10. A copy of the data stored in the server data management system 10 is stored in the client data management system 20 managed by the client management unit 117.
[0034]
Next, FIG. 3 is a block diagram showing a configuration of the client data management system 20 shown in FIG.
[0035]
Referring to FIG. 3, client data management system 20 stores, as storage areas, data storage area 201 for storing data itself, importance storage area 202 for storing data importance, and data classification information. A classification information storage area 203, a timer information storage area 204 for storing data timer information, and an update information storage area 205 for storing data update information are provided.
[0036]
Further, the client data management system 20 includes a correspondence table 206 for associating the data classification information with the data importance, and an importance determination unit 207 for determining the data importance from the data classification information based on the correspondence table 206. A keyword extracting unit 208 for extracting a keyword from the data; a correspondence table 209 for associating the keyword extracted by the keyword extracting unit 208 with the importance of the data; and an important table for determining the importance of the data based on the correspondence table 209. A degree search unit 210, a correspondence table 211 that associates keywords extracted by the keyword extraction unit 208 with data classification information, and a classification determination unit 212 that determines data classification based on the correspondence table 211 are provided.
[0037]
Further, the client data management system 20 includes an update data communication unit 213, an update information communication unit 214, an update information generation unit 215, and a state management unit 216.
[0038]
The update data communication unit 213 determines the reflection time of the updated data based on the importance of the data stored in the importance storage area 202 or the timer information of the data stored in the timer information storage area 204, and And sends the data to the server. Further, the update data communication unit 213 receives data updated by another client transmitted by the server.
[0039]
The update information communication unit 214 transmits update information of the data stored in the update information storage area 205 to the server based on the importance of the data stored in the importance storage area 202. Further, the update information communication unit 214 receives the update information transmitted by the server.
[0040]
The update information generation unit 215 generates update information for the update information communication unit 214 to transmit to the client based on the updated data stored in the data storage area 201.
[0041]
The information management unit 216 manages the operation state of the client including the client data management system 20. The information management unit 216 detects and manages the operation state of the client, such as power on / off. Then, the update information communication unit 214 transmits the update information to the server or receives the update information from the server according to the change in the operation state of the client detected by the information management unit 216.
[0042]
Next, the operation when new data is created on the client in the client server system shown in FIG. 1 will be described. Specifically, FIG. 4 is a flowchart illustrating an operation when a user who uses two clients, a PDA (Personal Digital Assistants) and a mobile phone, for managing schedule data creates new schedule data. It will be described with reference to FIG. Here, a description will be given assuming that the PDA as a client includes the client data management system 20a and the mobile phone includes the client data management system 20b. Note that the processing shown in the flowchart of FIG. 4 is realized by the control unit (not shown) of the server data management system 10 and the client data management system 20 reading and executing a program stored in the storage area.
[0043]
Referring to FIG. 4, first, the user newly creates schedule data in the PDA (step 101; hereinafter, steps are abbreviated as “S”). Next, the user inputs the importance, classification information together with the date, time, and content information of the schedule data (S102). Here, it is assumed that "3" out of the five levels is input as the degree of importance, and "job" representing a business schedule is input as the classification information.
[0044]
All information input by the user in step S102 is temporarily stored in the PDA client data management system 20a (S103). That is, the client data management system 20a stores the created schedule data itself in the data storage area 201, stores the importance of the data in the importance storage area 202, and stores the classification information of the data in the classification information storage area 203. .
[0045]
Next, the update data communication unit 213 of the client data management system 20a automatically determines the timing at which the newly created schedule data is reflected on the server based on the importance set by the user. (S104). That is, in step S104, when the importance of the data is high, the time is set so that the data is immediately transmitted to the server. On the other hand, if the data is of low importance, even if the data is updated, it is not necessary to immediately reflect the update result, and there is no need to generate unnecessary communication traffic. Set the time to send the data when it occurs.
[0046]
Specifically, if the newly created schedule data is related to a business meeting that has been set in a hurry, the schedule is recorded among the clients held by the user by increasing the setting importance. All clients will be able to register as soon as possible. On the other hand, if the schedule data is for private use outside business hours and the current time is within business hours, there is no need to immediately reflect the schedule data to other clients. Therefore, by setting the degree of importance to be set low, communication for transmitting only the new data to the server is not performed, and data is transmitted to the server later when some communication becomes necessary.
[0047]
Next, at the time set in step S104, the update data communication unit 213 transmits the schedule data, the importance of the data, and the classification information to the server data management system 10 included in the server (S105).
[0048]
The server data management system 10 stores the received schedule data in the data storage area 102, the importance set in the data in the importance storage area 103, and the classification information set in the data in the classification information storage area 104. It is stored (S106).
[0049]
Next, the update data communication unit 114 determines, based on the importance of the data, the timing at which the received new data is reflected on the mobile phone, which is another client held by the user, in the same manner as step S104 ( S107).
[0050]
Next, the update data communication unit 114 transmits the data, the importance of the data, and the classification information to the client data management system 20b of the mobile phone managed by the client management unit 117 at the time designated in step S107. (S108).
[0051]
The update data communication unit 213 of the mobile phone client data management system 20b stores the received data in the data storage area 201, the importance of the data in the importance storage area 202, and the classification information of the data in the classification information storage area 203. (S109).
[0052]
As described above, the schedule data newly created by the PDA is reflected on the server and the mobile phone. That is, in the client server system, when new data is created on the first client, the new data is reflected and shared between the server and the second client.
[0053]
Note that, here, the configuration may be such that the importance is not explicitly set by the user in step S102, but is set by the importance determination unit 207 using the data classification information. For example, in the above example, “3” of the five levels of importance is explicitly set for the schedule data newly created by the user. Is set in the correspondence table 206 of the importance discrimination unit 207 as shown in FIG. 207 can automatically set the importance.
[0054]
Further, a configuration may be employed in which the correspondence table 206 used by the importance determination unit 207 for setting the importance is updated using the importance explicitly set by the user. For example, as in the above example, when the data whose classification information is “work” is set to “3” for importance and input during business hours, the correspondence between the classification information and the importance is described by the data. By setting the information in the correspondence table 206 together with the information on the input time, it is possible to automatically add information to the correspondence table 206 necessary for the processing of the importance determination unit 207.
[0055]
Also, in step S102, the user does not explicitly set the importance, but extracts a keyword from the input data by the keyword extraction unit 208, and the importance search unit 210 uses the keyword to display the correspondence table. 209 may be set automatically. For example, as shown in FIG. 6, information is input to the correspondence table 209 such that the user previously sets “3” as the importance for the keyword “meeting” in the above example. In this case, when the keyword extraction unit 208 extracts the word “meeting” as a keyword from the newly created schedule data, the importance search unit 210 automatically determines the importance of this schedule data based on the correspondence table 209. 3 "can be set.
[0056]
Further, in step S102, the configuration may be such that the classification table 212 used by the classification determination unit 212 for setting the classification information is updated using the classification information explicitly set by the user. For example, in the above example, when the user inputs data including the word "meeting" and sets the classification information to "work" for the data, the correspondence between these keywords and the classification information is shown in a correspondence table. By setting to 211, it is possible to automatically add information to the correspondence table 211 necessary for the processing of the classification determination unit 212.
[0057]
Further, in step S102, the configuration may be such that the importance search section 210 updates the correspondence table 209 used for setting the importance by using the importance explicitly set by the user. For example, when data including the word “meeting” is input with the importance set to “3” as in the above example, the correspondence between the keyword “meeting” and the importance “3” is set in the correspondence table 209. , It is possible to automatically add information to the correspondence table 209 necessary for the processing of the importance search unit 210.
[0058]
In steps S102 and S103, the user explicitly and manually sets the timing at which the data is reflected in the server data management system 10 as timer information. In step S105, the client data management system 20a transmits the timer information to the server data management system 10a. It may be configured to transmit to the management system 10. In that case, in step S106, the timer information is stored in the timer information storage area 105, and in step S108, the timer information is also transmitted to the client data management system 20b. Further, the client data management system 20b stores the timer information in the timer information storage area 204 in step S109.
[0059]
For example, in the above example, when the user explicitly sets the time at which the data is to be reflected on the server at midnight at the time of newly creating schedule data, the time set by the user is prioritized in step S104. In step S105, the update data communication unit 213 reflects the data on the server at 12:00 midnight set by the user.
[0060]
Further, in this example, since communication regarding this data is performed at midnight set by the user, when data is transmitted to the server in step S105, information on the reflection time of this data is also transmitted to the server, and the server data management system It is stored in ten timer information storage areas 105.
[0061]
Furthermore, when the data newly stored in the server is reflected on the mobile phone as another client of the user, the reflection time set when the user first created the data is used preferentially. Is done. Therefore, in step S107, the data update unit 114 of the server data management system 10 reflects the data on the mobile phone at midnight set by the user. In step S108, the data update time information is also transmitted to the mobile phone along with the data. The data is transmitted to the telephone client data management system 20b. Then, in step S109, the client data management system 20b stores the information of the reflection time in the timer information storage area 204.
[0062]
In step S102, time information is added to the importance set for the data, the importance of the data changes in accordance with the change in the time of the time information, and the data is updated with the change in the importance. The configuration may also be such that the timer information for specifying the time also changes.
[0063]
For example, if the data related to the schedule is set to be less important during work hours and more important after work hours than the schedule data related to private appointments, this data Is changed during working hours due to sudden circumstances. In that case, the update of data is delayed during work hours because the data is less important, but the update of data is reflected immediately after work hours because the importance of data increases. It becomes possible.
[0064]
In step S108, the client management unit 117 holds information on types of data that can be processed by each client and information on communication means that can be used for data communication with each client, and transmits data to the client based on the information. May be controlled.
[0065]
For example, when the update data communication unit 114 transmits data including image data to the client, if the transmitting client cannot process the image data, or communication with the client requires a high communication cost such as a mobile phone line. When the communication path must be used, it is possible to control not to transmit the image data in the data to the client.
[0066]
Here, the importance setting processing by the importance search unit 210 in the above-described step S102 will be described with reference to the flowchart in FIG.
[0067]
Referring to FIG. 7, first, a keyword included in data is extracted by keyword extracting section 208 (S201). The keyword extraction method here uses a widely-known keyword extraction technique, and a description thereof will be omitted.
[0068]
Next, the importance search unit 210 acquires the importance corresponding to each extracted keyword according to the correspondence table 209 (S202). For example, when two keywords “emergency” and “meeting” are extracted from the schedule data input in the above example, the importance level is referred to by referring to the correspondence table 209 shown in FIG. To obtain “5” and “3”.
[0069]
Then, the importance of the data is determined using all the acquired importances (S203). In step S203, for example, the maximum importance among the acquired importances may be adopted as the data importance. Alternatively, an average value of the acquired importance levels may be adopted as the data importance level.
[0070]
Further, the setting processing of the classification information by the classification determining unit 212 in the above-described step S102 will be described with reference to the flowchart of FIG.
[0071]
Referring to FIG. 8, first, a keyword included in data is extracted by keyword extracting section 208 (S301). The process here is the same as that in step S201 described above, and thus description will not be repeated.
[0072]
Next, the classification determination unit 212 acquires classification information corresponding to all extracted keywords according to the correspondence table 211 (S302). For example, when the two keywords “emergency” and “meeting” are extracted in the above example, “work” is obtained as the classification information by referring to the correspondence table 211 shown in FIG. 9 using the keywords.
[0073]
Then, using the acquired classification information, the classification information of the data is determined (S303). For example, when a plurality of pieces of classification information are obtained, the importance corresponding to each keyword is obtained using the correspondence table 211, and the classification information corresponding to the keyword having the highest importance is set as the classification information of the data.
[0074]
The correspondence tables 107, 110, and 112 of the server data management system 10 and the correspondence tables 206, 209, and 211 of the client data management system 20 are also treated as one of the data handled by the client server system. When the correspondence table is updated in any of the above, the update may be automatically reflected.
[0075]
Here, in step S105, instead of transmitting the data, the importance of the data, and the classification information to the server data management system 10, another configuration may be used. More specifically, the update information generation unit 215 generates update information notifying only that data has been newly created and update information including an outline of data, and transmits them to the server from the update information communication unit 214. Configuration. In that case, the server data management system 10 receives the update information by the update information communication unit 115 and stores it in the update information storage area 106. Further, in step S108, the update information communication unit 115 transmits the update information stored in the update information storage area 106 to the client data management system 20b. The client data management system 20b may be configured so that the update information is received by the update information communication unit 214 and stored in the update information storage area 205.
[0076]
For example, consider a case where schedule data including document data with a large data amount as additional information is created. At this time, when it is necessary to use a communication line with a low communication speed such as a mobile phone in order to reflect the new creation of data, or when receiving document data having a large data amount like a mobile phone, it is meaningless. Sometimes, it is not preferable to reflect the update even when the data has a high degree of importance. In such a case, since the data itself is important, the server data management system 10 notifies the client only of the information that the schedule data has been added, and the user may request the data update at any time. it can.
[0077]
Also, consider a case where it is difficult to transmit large-sized image data shot by a digital camera using a communication line with a low communication speed such as a mobile phone. In this case, a thumbnail image of the photographed image is generated and transmitted through a communication line using a mobile phone, and the shooting data itself is in a situation where a higher-speed communication line can be used later. In this case, it is possible to transmit and receive data flexibly according to the status of an available communication line by separately transmitting the data.
[0078]
Here, if the client cannot communicate in step S108, another configuration may be adopted. Specifically, when the update data communication unit 213 of the client data management system 20b cannot receive the data transmitted from the server, the update data communication unit 114 of the server data management system 10 Is stored in the update information storage area 106, indicating that there is data to be transmitted from the server to the client. When the status management unit 216 of the client data management system 20b detects that the client is in a communicable state, the update information communication unit 214 sends the update information communication unit 115 of the server data management system 10 Request transmission of update information. Then, the update information communication 115 of the server data management system 10 transmits the update information stored in the update information storage area 106 to the client data management system 20b. The client data management system 20b requests the update data communication unit 213 to transmit data to the update data communication unit 114 of the server data management system 10 based on the update information received by the update information communication unit 214. Then, a configuration may be adopted in which the processing after step S108 is executed again.
[0079]
For example, in the above example, if the mobile phone held by the user is out of the service area, it is impossible to transmit data from the server to the mobile phone in step S108. Therefore, the server delays data transmission until the mobile phone is within the service area. In that case, the server stores update information indicating that data transmission to the mobile phone is necessary in the update information storage area 106.
[0080]
When the mobile phone enters the service area, the state management unit 216 of the mobile phone client data management system 20b senses that the communication state of the mobile phone has changed from outside the service area to within the service area. Then, the update information communication unit 214 requests the server data management system 10 to transmit the latest update information. In response, the server data management system 10 sends the update information stored in the update information storage area 106 to the mobile phone. Then, the mobile phone that has received it restarts the transmission of the data that the server could not transmit first in step S108.
[0081]
Next, an operation when existing data is changed on the client in the client server system shown in FIG. 1 will be described. Here, specifically, a case where a user who uses two clients, a personal computer (hereinafter abbreviated as a personal computer) and a mobile phone for managing address data, updates the existing address data on the mobile phone. The operation will be described with reference to the flowchart in FIG. Here, the description will be made assuming that the mobile phone includes the client data management system 20a and the personal computer includes the client data management system 20b. Note that the processing shown in the flowchart of FIG. 10 is realized by a control unit (not shown) of the server data management system 10 and the client data management system 20 reading and executing a program stored in a storage area.
[0082]
Referring to FIG. 10, first, the user updates existing address data on the mobile phone (S401). Next, the user updates the importance and classification information of the updated address data (S402).
[0083]
All information input by the user in step S402 is temporarily stored in the client data management system 20a of the mobile phone (S403). That is, the client data management system 20a stores the updated address data in the data storage area 201, the importance of the data in the importance importance storage area 202, the classification information of the data in the classification information storage area 203, and Update information indicating that the data has been updated is stored in the update information storage area 204.
[0084]
Next, based on the importance of the updated data, the update data communication unit 213 of the client data management system 20a determines the timing of reflecting the data on the server in the same manner as in step S104 (S404).
[0085]
Next, the update data communication unit 213 transmits the address data, the importance of the data, and the classification information to the server data management system 10 at the time set in step S404 (S405).
[0086]
The server data management system 10 stores the received address data in the data storage area 102, the importance set in the data in the importance storage area 103, and the classification information set in the data in the classification information storage area 104. It is stored (S406).
[0087]
Next, the update data communication unit 114 determines the timing of reflecting the received updated address data to the personal computer, which is another client held by the user, based on the importance of the data in the same manner as in step S404. (S407).
[0088]
Next, the update data communication unit 114 transmits the data, the importance of the data, and the classification information to the client data management system 20b of the personal computer managed by the client management unit 117 at the time designated in step S407. (S408).
[0089]
The update data communication unit 213 of the client data management system 20b of the personal computer stores the received data in the data storage area 201, the importance of the data in the importance storage area 202, and the classification information of the data in the classification information storage area 203. Each is stored (S409).
[0090]
As described above, the address data updated by the mobile phone is reflected on the server and the personal computer. That is, in the client server system, when existing data is changed on the first client, the changed data is reflected and shared between the server and the second client.
[0091]
Here, in step S402, similarly to step S102, the user does not explicitly set the importance, but sets the importance using the data classification information by the importance determination unit 207. Good.
[0092]
Also, in step S402, similar to step S102, the user may not explicitly set the importance, but may automatically set the importance by the importance search unit 210.
[0093]
Further, in step S402, similarly to step S102, the configuration may be such that the user does not explicitly set the classification information, but the classification discriminating unit 212 automatically sets the classification information.
[0094]
In steps S402 and S403, similarly to steps S102 and S103, the user explicitly and manually sets the timing at which the data is reflected in the server data management system 10 as timer information. It may be configured to transmit the data to the data management system 10. In that case, the server data management system 10 stores the timer information in the timer information storage area 105 in step S406, and also transmits the timer information to the client data management system 20b in step S408. Further, the client data management system 20b may be configured to store the timer information in the timer information storage area 204 in step S409.
[0095]
Alternatively, the configuration may be such that the importance and the classification information set in the past are used for the updated data without executing step S402.
[0096]
Further, in step S402, similarly to step S102, time information is added to the importance set for the data, and the importance of the data changes according to the change in time according to the time information. Alternatively, the timer information for designating the update time of the data may be changed.
[0097]
Note that the processing of setting the importance by the importance search unit 210 and the processing of setting the classification information by the classification determination unit 212 in step S402 are the same as the processing in step S102 described above, and thus the detailed description here will be repeated. Absent.
[0098]
Here, in steps S404 and S405, the update data is not reflected on the server at a specific timing, but is updated when the status management unit 216 of the client data management system 20a detects a change in the operation status of the client. The information communication unit 202 may be configured to transmit the update information stored in the update information storage area 205 to the server data management system 10. In this case, in step S406, the server data management system 10 receives the update information by the update information communication unit 115 and stores the update information in the update information storage area 106. Further, in step S408, the update information communication unit 115 transmits the update information stored in the update information storage area 106 to the client data management system 20b. The client data management system 20b may be configured to store the update information received by the update information communication unit 214 in the update information storage area 205 in step S409.
[0099]
For example, when the address data provided in the mobile phone is updated in the above example, the updated address data itself is not transmitted to the server, but only the information that the address data has been updated is transmitted to the server. Similarly, only information that the update has been performed is transmitted to the personal computer as one client. As a result, it is possible to reduce unnecessary communication traffic for updating address data that is not frequently used. Then, when the personal computer needs to refer to the updated address data, the personal computer can obtain the updated address data from the mobile phone via the server.
[0100]
Here, in step S405, similarly to step S105, the data, the importance of the data, and the classification information may not be transmitted to the client data management system 20b, but may have another configuration. Specifically, the update information generation unit 215 generates update information notifying only that the data has been updated and update information including an outline of the updated data, and transmits these from the update information communication unit 214 to the server. Configuration. In that case, the server data management system 10 receives the update information by the update information communication unit 115 and stores it in the update information storage area 106. Further, in step S408, the update information communication unit 115 transmits the update information stored in the update information storage area 106 to the client data management system 20b. The client data management system 20b may be configured so that the update information is received by the update information communication unit 214 and stored in the update information storage area 205.
[0101]
Here, in step S408, similarly to step S108, if the client cannot communicate, another configuration may be adopted. Specifically, instead of the update data communication unit 213 of the client data management system 20b receiving the data transmitted from the server, the update data communication unit 114 of the server data management system 10 Then, the update information indicating that there is data to be transmitted from the server to the client is stored in the update information storage area 106. When the status management unit 216 of the client data management system 20b detects that the client is in a communicable state, the update information communication unit 214 sends the update information communication unit 115 of the server data management system 10 Request transmission of update information. Then, the update information communication 115 of the server data management system 10 transmits the update information stored in the update information storage area 106 to the update information communication unit 214 of the client data management system 20b. The client data management system 20b requests the update data communication unit 213 to transmit data to the update data communication unit 114 of the server data management system 10 based on the update information received by the update information communication unit 214. Then, a configuration may be adopted in which the processing after step S408 is executed again.
[0102]
Next, an operation when new data is created on the server in the client server system shown in FIG. 1 will be described. Here, specifically, an operation when a user who manages schedule data on a server and uses a PDA and a personal computer as a client, creates new schedule data on the server through a WWW client or the like. This will be described with reference to the flowchart of FIG.
[0103]
Referring to FIG. 11, first, the user newly creates schedule data on the server (S501). Next, the user inputs the importance and classification information of the created schedule data (S502). At this time, the server management system 10 stores the created schedule data in the data storage area 102, stores the importance of the data in the importance storage area 103, and stores the classification information of the data in the classification information storage area 104 ( S503).
[0104]
Next, based on the importance of the newly created schedule data, the update data communication unit 114 of the server data management system 10 determines the timing of reflecting the data to the client in the same manner as in step S104 (S504). .
[0105]
Next, at the time set in step S504, the update data communication unit 114 transmits the schedule data, the importance of the data, and the classification information to the client data management system of the PDA and the personal computer managed by the client management unit 117. 20 (S505).
[0106]
The client data management system 20 of the PDA and the personal computer stores the received schedule data in the data storage area 201, the importance set in the data in the importance storage area 202, and the classification information set in the data in the classification information. Each is stored in the area 203 (S506).
[0107]
As described above, the schedule data newly created on the server is reflected on the PDA and the personal computer. That is, in the client-server system, when new data is created on the server, the new data is reflected and shared by all clients storing the data in the server.
[0108]
Here, in step S502, similarly to step S102, the user does not explicitly set the importance, but automatically uses the data classification information by the importance determination unit 207 to determine the importance. It may be configured to be set.
[0109]
Further, in step S502, similarly to step S102, the user may not explicitly set the importance, but may automatically set the importance by the importance search unit 111.
[0110]
Further, in step S502, similarly to step S102, the configuration may be such that the user does not explicitly set the classification information, but the classification discriminating unit 113 automatically sets the classification information.
[0111]
In steps S502 and S503, similarly to steps S102 and S103, the user explicitly and manually sets the timing of reflecting the data in the client data management system 20 as timer information, and in step S505, the server data management system 10 may also transmit the timer information to the server data management system 20, and store the timer information in the timer information storage area 204 in step S806.
[0112]
In step S502, similarly to step S102, time information is added to the importance set for the data, and the importance of the data changes according to a change in time according to the time information. Alternatively, the timer information for designating the update time of the data may be changed.
[0113]
The process of setting the importance by the importance search unit 111 and the process of setting the classification information by the classification determination unit 113 in step S502 are the same as the processes by the importance search unit 210 and the classification determination unit 212 in step S102 described above. Therefore, the detailed description will not be repeated here.
[0114]
Here, in step S505, instead of transmitting the data, the importance of the data, and the classification information to the client data management system 20, another configuration may be used. Specifically, the update information generation unit 116 generates update information notifying only that data is newly created or update information indicating an outline of data, and transmits these to the client from the update information communication unit 115. Configuration. In this case, the client data management system 20 may be configured to receive the update information by the update information communication unit 214 and store the update information in the update information storage area 205.
[0115]
For example, when new schedule data is created on the server in the above example, the schedule data itself is not immediately transmitted to the user's client PDA and mobile phone, but only that the schedule data has been added. Send information to the client. Then, when the user needs details of the schedule data while using the PDA or the mobile phone, the user requests the server to transmit the schedule data, and the PDA receives the request. This makes it possible to reduce unnecessary communication traffic when the schedule data has a large amount of data including image data and the like and when the importance is low.
[0116]
Here, in step S505, similarly to step S108, if the client cannot communicate, another configuration may be used. Specifically, the update data communication unit 213 of the client data management system 20 does not receive the transmitted data, but the update data communication unit 114 of the server data management system 10 generates the update data generation unit 116. The update information of the data is stored in the update information storage area 106. When the status management unit 216 of the client data management system 20b detects that the client is in a communicable state, the update information communication unit 214 sends the update information communication unit 115 of the server data management system 10 Request transmission of update information. Then, the update information communication unit 115 transmits the update information stored in the update information storage area 106 to the update information communication unit 214 of the client data management system 20. The client data management system 20 requests the update data communication unit 213 to transmit data to the update data communication unit 114 of the server data management system 10 based on the update information received by the update information communication unit 214. Then, a configuration may be adopted in which the processing after step S508 is executed again.
[0117]
Next, the operation of the client server system shown in FIG. 1 when existing data is changed on the server will be described. Here, specifically, an operation when a user who manages address data on a server and uses a PDA and a mobile phone as a client, updates existing address data on the server through a WWW client or the like. This will be described with reference to the flowchart of FIG.
[0118]
Referring to FIG. 12, first, the user updates existing address data on the server (S601). Next, the user updates the importance and the classification information of the updated address data (S602). At this time, the server data management system 10 stores the updated address data in the data storage area 102, the importance of the data in the importance storage area 103, the classification information of the data in the classification information storage area 104, and the Update information indicating that the information has been updated is stored in the update information storage area 106 (S603).
[0119]
Next, the update data communication unit 114 of the server data management system 10 determines the timing of reflecting the updated data to the client based on the importance of the updated data, as in step S104 (S604).
[0120]
Next, at the time set in step S604, the update data communication unit 114 compares the address data, the data importance, and the classification information with the PDA and mobile phone client data management managed by the client management unit 117. The data is transmitted to the system 20 (S605).
[0121]
The client data management system 20 of the PDA and the mobile phone stores the received data in the data storage area 201, stores the importance set for the data in the importance storage area 202, and stores the classification information set for the data in the classification information. Each is stored in the area 203 (S606).
[0122]
As described above, the address data updated by the server is reflected on the PDA and the mobile phone. That is, in the client-server system, when existing data is changed on the server, the changed data is reflected and shared by all clients storing the data in the server.
[0123]
Here, in step S602, as in step S102, the user does not explicitly set the importance, but automatically uses the data classification information by the importance determination unit 207 to determine the importance. It may be configured to be set.
[0124]
Further, in the step S602, similarly to the step S102, the importance may not be explicitly set by the user, but may be automatically set by the importance search unit 111.
[0125]
Further, in step S602, similarly to step S102, the configuration may be such that the user does not explicitly set the classification information, but the classification determining unit 113 automatically sets the classification information.
[0126]
In steps S602 and S603, similarly to steps S102 and S103, the user explicitly and manually sets the timing of reflecting the data in the client data management system 20 as timer information. In step S605, the timer information is also stored in the server. The configuration may be such that the timer information is transmitted to the data management system 20 and the timer information is stored in the timer information storage area 204 in step S606.
[0127]
Also, in step S602, similarly to step S102, time information is added to the importance set for the data, and the importance of the data changes according to the change in time according to the time information. Alternatively, the timer information for designating the update time of the data may be changed.
[0128]
Note that the process of setting the importance by the importance search unit 111 and the process of setting the classification information by the classification determination unit 113 in step S602 are the same as the processes in step S502 described above, and thus the detailed description here will be repeated. Absent.
[0129]
Here, in step S605, similarly to step S505, the data, the importance of the data, and the classification information may not be transmitted to the client data management system 20, but may have another configuration. Specifically, the update information communication 115 transmits information generated by the update information generation unit 116 and notifying only that the data has been updated, and the information is transmitted to the update information communication unit 214 of the client data management system 20. It may be configured to receive.
[0130]
Note that, here, when the client is in a communication-disabled state in step S606 as in step S506, another configuration may be adopted. Specifically, instead of the update data communication unit 213 of the client data management system 20 receiving the transmitted data, the update data communication unit 114 of the server data management system 10 stores the data in the update information storage area 106. Is stored. When the status management unit 216 of the client data management system 20b detects that the client can communicate, the update information communication unit 214 sends the update information communication unit 115 of the server data management system 10 Request transmission of update information. Then, the update information communication unit 115 transmits the update information stored in the update information storage area 106 to the update information communication unit 214 of the client data management system 20. Further, the client data management system 20 requests the update data communication unit 213 to transmit data to the update data communication unit 114 of the server data management system 10 based on the update information received by the update information communication unit 214. Then, a configuration may be adopted in which the processing after step S608 is executed again.
[0131]
The client-server system according to the present embodiment has the above-described configuration, and performs the above-described processing, so that the server data management system and the user use the data created and updated by the user in the client data management system. It can be automatically reflected in the client data management system of another client. Further, by controlling the timing of reflecting the data in accordance with the importance of the data, the more important the data, the higher the priority of the processing, and the less unnecessary communication traffic due to the unimportant data can be suppressed. Therefore, appropriate data sharing between the server and the plurality of clients can be realized by efficiently using the communication traffic.
[0132]
That is, it is possible to construct a server that can hold data in the server and efficiently reflect the update result of the data to the client.
[0133]
Further, it is possible to construct a client-server system in which the same data is held in both the client and the server, and the result of updating the data performed in each is automatically reflected on each other.
[0134]
In addition to setting the importance of data, in addition to the user making individual settings for each data, automatically extract keywords included in the data and automatically set the importance based on the keywords. Can be.
[0135]
That is, the user can arbitrarily set the importance of the data and individually set the timing at which each data is updated.
[0136]
In addition, instead of directly specifying the importance of data, the classification information is specified for the data, and the importance is determined based on this information. Can manage.
[0137]
Further, the importance of the data can be automatically set based on the keywords included in the data.
[0138]
Further, data classification information can be automatically set based on a keyword included in the data.
[0139]
Further, since the time at which the update result of the data is reflected is specified as the timer information, the time at which the update result is reflected can be directly specified.
[0140]
Further, even when the data is updated, by communicating only the information that the update has been performed, it is possible to suppress unnecessary communication traffic for transmitting and receiving unnecessary data.
[0141]
That is, information indicating that the data has been updated is managed, and when the updated data itself is not needed for the time being, only this information is transmitted and received between the client and the server, so that the data is updated. However, it is possible to reduce the amount of communication required for transmitting and receiving unnecessary data for the time being.
[0142]
When creating information indicating that data has been updated, it is possible to individually specify what information is included in the information indicating that the data has been updated according to the content of the data.
[0143]
Further, when the operation state of the client changes, information indicating that the data has been updated can be automatically transmitted / received, for example, at the timing when the power is turned on or when communication becomes possible. .
[0144]
Further, it is possible to control the timing of exchanging information indicating that the data has been updated between the client and the server according to the importance of the data as well as when the operation state of the client changes.
[0145]
Further, in the present embodiment, data created and updated by the user in the server data management system can be similarly reflected and shared by all clients used by the user.
[0146]
Furthermore, the data management method in the client server system described above can be provided as a program. Such a program is stored in a computer-readable recording medium such as a flexible disk, a compact disc-read only memory (CD-ROM), a read only memory (ROM), a random access memory (RAM), and a memory card attached to a computer. Can be recorded and provided as a program product. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk incorporated in the computer. Further, the program can be provided by downloading via a network.
[0147]
The provided program product is installed and executed in a program storage unit such as a hard disk. Note that the program product includes the program itself and a recording medium on which the program is recorded.
[0148]
The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a client server system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a server data management system 10 shown in FIG.
FIG. 3 is a block diagram showing a configuration of a client data management system 20 shown in FIG.
FIG. 4 is a flowchart illustrating an operation when new data is created on a client in the client server system illustrated in FIG. 1;
FIG. 5 is a diagram illustrating a specific example of a correspondence table 206 used by an importance determination unit 207;
FIG. 6 is a diagram showing a specific example of a correspondence table 209 used by the importance search unit 210.
FIG. 7 is a flowchart showing a setting process of importance by an importance search unit 210 in step S102 of FIG. 4;
8 is a flowchart showing a classification information setting process performed by a classification determination unit 212 in step S102 of FIG.
FIG. 9 is a diagram illustrating a specific example of a correspondence table 211 used by a classification determination unit 212;
FIG. 10 is a flowchart showing an operation when existing data is updated on a client in the client server system shown in FIG. 1;
FIG. 11 is a flowchart showing an operation when new data is created on the server in the client server system shown in FIG. 1;
FIG. 12 is a flowchart showing an operation when existing data is updated on the server in the client server system shown in FIG. 1;
[Explanation of symbols]
Reference Signs List 10 server management system, 20, 20a-d client data management system, 102 server management system data storage unit, 103 server management system importance storage area, 104 server management system classification information storage area, 105 server management system timer Information storage area, 106 Update information storage area of server management system, 107, 110, 112 Correspondence table of server management system, 108 Importance discrimination part of server management system, 109 Keyword extraction part of server management system, 111 of server management system Importance search unit, 113 Server management system classification determining unit, 114 Server management system update data communication unit, 115 Server management system update information communication unit, 116 Server management system update information generation unit, 117 client management unit, 2 1 client data management system data storage unit, 202 client data management system importance storage area, 203 client data management system classification information storage area, 204 client data management system timer information storage area, 205 client data management system update Information storage area, 206, 209, 211 Correspondence table of client data management system, 207 Client data management system importance determination unit, 208 Client data management system keyword extraction unit, 210 Client data management system importance search unit, 212 Client data management system classification determining unit, 213 Client data management system update data communication unit, 214 Client data management system update information communication unit, 2 Update information generating unit 5 client data management system, 216 state management section.

Claims (14)

Data storage means for storing data and importance of the data,
A server comprising: an update data communication unit that determines a reflection time of the updated data based on the importance of the held data and updates the data to a client. A client that stores data on a server and holds a copy of the data stored on the server,
Data storage means for storing data and importance of the data,
An update data communication unit that determines a reflection time of the updated data based on the importance of the held data and updates the data to the server. A client-server system that includes a server that stores data and a client that holds a copy of the data stored in the server, and that communicates with each other,
Data storage means for storing data and the importance of the data in the server and the client;
A client server system comprising: an update data communication unit that determines a reflection time of the updated data based on the importance of the held data and reflects the update of the data. 4. The client server system according to claim 3, further comprising an importance editing unit that allows a user to arbitrarily edit the importance of the data held in the data storage unit. 4. The client server system according to claim 3, further comprising an importance changing unit that dynamically changes the importance of the data held by the data storage unit with time. 4. The client according to claim 3, wherein the data storage unit further stores importance information of the data, and further includes an importance determination unit configured to determine importance of the updated data based on the stored information. 5. Server system. The data storage means, keyword extraction means for extracting a keyword from the data,
A correspondence table between a keyword and importance for determining the importance of the data based on the extracted keyword,
4. The client server system according to claim 3, further comprising: an importance search unit configured to determine an importance of the data based on the correspondence table. The data storage means, keyword extraction means for extracting a keyword from the data,
A correspondence table between keywords and classifications for determining the classification of the data based on the extracted keywords,
4. The client server system according to claim 3, further comprising a classification determining unit configured to determine a classification of the data based on the correspondence table. The data storage unit holds timer information that specifies a time at which the update of the data is reflected,
9. The client server system according to claim 3, wherein the update data communication unit reflects the update data at the specified time based on the timer information. The data storage unit holds update information indicating that the data has been updated,
Update information communication means for transmitting and receiving the update information based on a change in the state of the client,
The client server system according to claim 3, wherein the update data communication unit reflects the update of the data based on the update information. The data storage unit holds update information indicating that the data has been updated,
Update information communication means for transmitting and receiving the update information based on the importance of the data, further comprising:
The client server system according to claim 3, wherein the update data communication unit reflects the update of the data based on the update information. The client server system according to claim 11, wherein the update information communication unit further transmits and receives the update information based on a status change of the client. The data storage unit according to claim 10, further comprising: an update information generation unit configured to generate the update information based on the updated data in accordance with the importance of the updated data. Client server system. 14. The client-server system according to claim 13, wherein the update information generation unit generates the update information according to one of a capacity of the updated data and a communication status between the server and the client.

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