JP2003067239A - Page information update method, page information update system and schedule managing system for semi-conductor manufacturing line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method to update page information by transmitting the information that is ever changing from a server side to a client side in real time in a network while keeping down the increase in amount of traffic. SOLUTION: The page information update method which is characteristic that in a system transmitting data from the server to the client and displaying the data at the client is provided with a process by which discriminating information and discriminating information for a browsed page of the client is obtained by the server when the client is connected to the network and registering it to browsing client information, a process to transmit the updated page information to the client by searching for the client who is browsing the page from the browsing client information when the page information is updated in the server and a process to receive the page information transmitted to the client, editing it and displaying the newest page information.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a web (World).
The present invention relates to a method for updating page information on d Wide Web (abbreviation), and more particularly to a method for transmitting information that changes from time to time on the network from the server side to the client side and displaying it on a display. Here, page information refers to web contents.

[0002]

2. Description of the Related Art In a system in which page information stored in a web server is referred to on a client's web browser, page information is distributed to clients who have accessed via a network. There are various timings for this distribution. There are mainly the following three types of conventional page information updating methods on the web. The first is a method in which the user himself / herself issues an update request and the page information is distributed in response to this. This method is the simplest and most common. The second is a method in which the client's web browser periodically repeats access to the server on behalf of the user for update requests.
This is a method that saves a lot of time and effort for the user as compared with a method in which the user requests update. The third method is a push type method, which is a modification of the second method. This has information about delivery information called metadata on the server, and the definition of the update interval of page information, the last update time of page information, etc. are recorded therein.
Then, when there is access from the web browser on the client side, this metadata is notified to the web browser. The web browser accesses the server every time interval obtained from the metadata and updates the information as needed. That is, in the push type, the web browser on the client side automatically fetches the latest information based on the interval defined in advance by the server, and if the defined time interval and the actual information update time match, Stay up to date.

FIG. 10 is a diagram showing a conventional push-type page information acquisition and update method. In the figure, 1 is a client A which is one of a plurality of clients, 2 is a server, 3 is a storage device in which page information is stored, and 10 is metadata. The client A1 periodically requests the server 2 for the metadata 10 and confirms the last update time of the page information in the received metadata 10. If this time matches the last update time recorded by the client A1, the update is not performed. However, if the final update time in the received metadata 10 is later than the final update time of the client A1, the server 2 is requested to update new page information. Therefore, the latest page information is transmitted from the server 2. The client A1 updates the page information 6 with the received page information, and the display 7
Display to.

Next, a conventional page information updating method will be specifically described by using an example of a schedule monitoring system of a semiconductor manufacturing line. This system is a system that monitors and manages a schedule in order to operate each manufacturing apparatus in a semiconductor manufacturing factory at a high operating rate. In this system, information such as the operating status of each device is displayed on the display of the client, and the administrator who sees the information corrects the schedule or changes the priority order according to an emergency. For example, when the manufacturing equipment is changed from the waiting state to the in-use state, or when the in-use state becomes empty, or when the lot state is changed, the data is updated sequentially and the device information is updated. Is displayed on the client display.

FIG. 11 shows an example of an output screen of the schedule monitoring system for this semiconductor manufacturing line. In FIG. 11, from the left side of the table, a lot cassette (a unit in which a plurality of semiconductor products are integrated), priority, lot process state, current specification, schedule specification, schedule device (scheduled device), Arrival time (time when the lot arrived at the process), time on the process start schedule, time on the process end schedule, number of wafers, product type /
Each data of technology information, delivery date, and time on the next small process start schedule is displayed. Such data changes every moment and is updated. Particularly, in this, the lot process state, the schedule specification and the arrival time are frequently updated in units of 1 to several minutes. When the user needs to obtain the latest information while monitoring the output screen, the user himself issues a request for updating the page information. Alternatively, the client side performs automatic page information update processing based on the update interval defined in the server metadata. For example, in this system, the time interval for the scheduling system to calculate a new schedule is 30 minutes, and accordingly, the standard automatic update time is set to 30 minutes.

[0006]

However, the conventional methods have the following problems. First, the method in which the user himself / herself issues an update request is troublesome for the user, and it cannot be said that the latest information is obtained in real time.
Also, the method in which the web browser on the client side repeatedly accesses the server on a regular basis is also performed at a timing unrelated to the actual information update, so it cannot be said that the latest information is obtained in real time either. . Further, even with the push type method, since the information update time interval is fixed, it does not coincide with the actual page information update timing. Therefore, even if the data is updated with new data, the latest information cannot be transmitted to the user for at least a certain time until the next update. For example, in the above-described schedule monitoring system for a semiconductor manufacturing line, the information is updated only every 30 minutes, but the lot process state actually changes every 1 to several minutes. Therefore, it may happen that the device for which the processing step has been completed is displayed as an operating device, or the device for which processing has been started is displayed as a process waiting state. Then, there arises a problem that an efficient schedule cannot be set up such that an urgent process is not preferentially processed, and a play time of the device is created.

This point can be improved by setting the information update time as short as possible, but if the update time is short, the amount of traffic on the network increases accordingly. For example, in a schedule management system for a semiconductor manufacturing line, if the data is updated at 1-minute intervals, the latest data will be displayed, but 30 times more data transmission / reception will be performed than at 30-minute intervals. . Therefore, the load on the system is increased and the overall processing efficiency is reduced.

Therefore, an object of the present invention is to update page information on the Web in real time and to update the latest data with a minimum required data amount without increasing the traffic amount on the network more than necessary. And

[0009]

In order to solve the above problems, in the present invention, page information is updated by a page information updating method having the following features. FIG. 1 is a conceptual diagram of the present invention. In FIG. 1, 1 is a client A, which is one of a plurality of clients, 2 is a server, 3 is page information (master) file on the server side,
Reference numeral 4 is browsing client information, 5 is an application program for updating page information, 6 is a page information file on the client side, and 7 is a display on the client side. First, the client A1, which is one of the plurality of clients, connects to the network. At this time, information necessary for identifying the client A1 and information necessary for identifying the page to be browsed are registered in the browsing client information 4 of the server. The server 2 can recognize which client is currently browsing which page by looking at this information. Next, the server 2 transmits the page information 3 and, if necessary, the information updating application program 5 to the client A1. The client A1 receiving this information stores the received information in the page information file 6 on the client side and the like, and displays the page information on the display 7. When the page information 3 of the server 2 is updated, the server 2 sends the updated page information 6 to all the browsing clients including the client A1 existing in the browsing client information 3. The client A1 receiving this information stores the information in a file and displays the updated page information on the display 7. Finally, when the client A1 ends the connection to the network, the server 2 deletes the information about the client A1 from the browsing client information 4. According to the present invention, the update information can be sent from the server side in real time without accessing the server from the client side.

According to the first aspect of the present invention, in a system in which page information is transmitted from a server to a plurality of clients and the page information is displayed at the client, the server recognizes a client who is browsing a specific page, and the page is displayed. When the information is updated, the updated page information data is transmitted to the browsing client recognized by the server.

According to the present invention, since the server recognizes the client being browsed, the server side can voluntarily transmit the information without waiting for the update request from the client side. Since the server can recognize that its page information has been updated, the server can send the updated information to the client at that timing.

A second aspect of the present invention is the page information updating method according to the first aspect, wherein the server has information regarding a client who is browsing a specific page.

According to the present invention, the server / client
When the server side clearly understands the relationship between (plurality), the server can manage all clients that must update information.

According to a third aspect of the present invention, in the page information updating method according to the second aspect, the information regarding the client being browsed is the identification information of each client, the identification information of the page to be browsed by the client, and the client. The page information updating method is characterized by including at least information on an access start time to the page to be browsed.

According to the present invention, the information of the clients being browsed can be minimized, and the memory capacity can be small even if the total number of clients becomes large.

According to a fourth aspect of the invention, in the page information updating method according to the second aspect, the information of the client being browsed is acquired by the server when the client issues a browsing request. This is the update method.

According to the present invention, since the information of the client being browsed is acquired by the server at the time when the client issues a browsing request, the server / client (plurality) relationship is not a fixed relationship but is dynamically added. -Can be deleted. Also,
Since the information is required only the first time, the number of times of access can be small.

According to a fifth aspect of the invention, in the page information updating method according to the first aspect, the updated page information to be transmitted to the client is only difference information from the page information before updating. This is the method for updating page information.

According to the present invention, since the information update transmits only the information that is different between the old page information being displayed and the new page information, the amount of data to be transmitted becomes extremely small and the traffic amount on the network increases. do not do. If the amount of data to be updated is small, the amount of transmission information and transmission time are saved, which is efficient.

According to a sixth aspect of the present invention, in the page information updating method according to the fifth aspect, the server edits the difference information data to display an updated page information. It is a page information updating method characterized by transmitting to a client.

According to the present invention, the client side can appropriately edit the received data and display the updated data even in a special data format with an agreement between the server and the client. Therefore, the amount of data to be transmitted is small, and the update display can be performed at high speed.

According to a seventh aspect of the present invention, in a system for transmitting page information from a server to a plurality of clients and displaying the page information at each client, when the client is connected to a network, the identification information of the client and the browsing page are displayed. The server acquires the identification information of the information and registers it in the browsing client information, and when the page information on the server is updated, the client that is browsing the page is searched from the browsing client information and updated to the client. And a process of transmitting the page information transmitted by the client and displaying the page update information by receiving the transmitted page information.

According to the present invention, since the server recognizes the client being browsed, the server side can voluntarily transmit the information without requesting the update from the client side.
Since the server can recognize that its page information has been updated, the server can send the updated information to the client at this timing.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. In the present embodiment, the monitoring / management system of the semiconductor manufacturing line is taken as an example, but the application of the present invention is not limited to this, and can be applied to various uses.

An embodiment of the data updating method of the present invention will be described below with reference to FIGS.

FIG. 2 is a schematic configuration diagram of a system to which the present invention is applied. In FIG. 2, 11 is a lot of semiconductor products in process, 12 is a manufacturing line, 13a to 13c are manufacturing processes, 14 is a manufacturing process management system, 15 is an I / O port, 16 is a scheduler server, and 17 is a dispatcher. -It is a server. Reference numeral 18 denotes various databases, including, for example, a lot progress management database, an equipment state management database, a process route definition database, and the like. Further, 19 is an intranet which is an in-house network, 20 is a factory monitoring system, 21a-c are personal computers which are clients, 22a-c are displays connected to the clients 21a-c, and 23a.
˜c are storage devices connected to the client.

The work-in-process product 11 is sequentially processed by each manufacturing apparatus in each manufacturing process 13a to 13c. The processing status is notified to the manufacturing process management system 14 in real time as information such as a processing waiting status, a processing status, a post-processing status (a status before proceeding to the next process), and the like. The scheduler server 16 in the manufacturing process management system 14 determines a schedule of which device is to process which lot of work-in-process. Then, for example, this information is transmitted to the dispatcher server 17 every 30 minutes. The dispatcher server 17 transmits data regarding schedules and device states to the clients 21a to 21c of the factory monitoring system 20 via the intranet 19 and causes the displays 22a to 22c connected to the clients 21a to 21c to display the information. A user who monitors each process in the factory uses this information to change the priority of the process or correct the schedule.

FIG. 3 is a diagram for explaining the procedure of data updating to which the present invention is applied. In the figure, 30 is an initial procedure process, 31 is a real-time update process, and 32 is an end procedure process.

First, the initial procedure processing 30 will be described. The initial procedure process 30 is a process performed when a browsing request is first made from a client and a process performed every time a session for browsing page information is established. The server receives a browsing request for page information on the server from the client (33). The server searches the log file (a table of IP addresses in the auxiliary storage device) for the IP address of this client to determine whether or not this client is a client that has requested browsing in the past. (34). If this client is a new client that issued a browse request for the first time, the IP address of the client and the UR for which the browse request is made
Various information such as the access start time to the L address and the URL address is acquired (35) and newly registered in the browsing client information. If the client is not a new client and is necessary, each browsing client information is updated. This initial procedure processing makes the relationship between the server and the client clear. In this example,
The number of clients requesting browsing for one browsing target is the number of users in the factory monitoring system, for example, 3
It is about 0, and it does not become an unspecified number.

Next, the server sends the required application program to the client (36). This application program includes an automatic update processing program for displaying the page information update data received by the client side on the display in real time. If the client is not a new client, it has already been transmitted, and thus such application program transmission processing is not performed. Finally, the page information is sent from the server to the client that requested the browsing (3
7). The session is disconnected when the client receives the page information.

Next, the real-time updating process 31 will be described. The real-time update process 31 is a process of transmitting the changed content from the server side to the client side when the page information being browsed by the client is changed. The page information is updated by a GUI operation of an operator for an application such as a dispatcher and a server-side regular process as a trigger. At the same time as this update, an update event of page information is generated on the application side. In this way, when the page information changes (38), the server recognizes itself that it needs to send the latest information to the client. Then, the real-time update application is started from the update event. The real-time update application prepares update information data to be sent to the client. For example, difference information data between the previous page information and the new page information is created (39).
Next, the browsing client information is searched to obtain the IP address of the user who is currently browsing the corresponding page (4
0), update the access start time of the client. Then, the update information data is transmitted to all the browsing clients (41). The session ends when the client receives the update information data.

Next, the termination procedure processing 32 will be described. Termination procedure processing 32 is a URL that is browsed when the client requests the termination of the connection or from the client.
This is the process when notified that the address has been changed. When notified of the end of connection (42), the server deletes the IP address and access start time of the current session, which is data indicating that the client is currently browsing, from the browsing client information (43). When the user changes the browsing target or terminates the connection, the data is deleted, so that even if the page information is updated thereafter, the server does not send the updated information to the client.

FIG. 4 shows an information table of each client stored by the server as browsing client information. As shown in the figure, the browsing client information includes screen information 40 stored in the auxiliary storage device and session information 41 stored in the main storage device. Among them, the IP address is information necessary for the server side to recognize each client. The IP address is stored in the auxiliary storage device as client-specific master data that does not change for each session. Further, it is also stored in the main storage device as key information of the information changed for each session. The URL address is an address of page information that the client browses. The URL address is information necessary for the server side to recognize the page information that each client is trying to browse. The URL address is stored in the auxiliary storage device as client-specific master data that does not change for each session. The access start time is information necessary for determining whether the information currently viewed by each client is the latest information. The access start time is stored in the main memory together with the IP address at the same time when the session is started, as key information of information changed for each session.

Next, the page information data for updating transmitted from the server will be described. This data may be the entire corresponding page information, but it is preferable to use only the difference information between the old data and the new data in order to reduce the amount of data. The difference information data is created by comparing the information data of the page information transmitted to the client on the server side with the updated page information. By this comparison, the start position information and the end position information of the different portion are acquired, and the difference information data is created.

FIG. 5 shows two data formats of the difference information data. The difference information data is in the HTML format,
There are two types of attachment file formats. Difference information data is H
In the case of the TML format, the difference information start code in the HTML format is added to the beginning. Then, the difference start position information and the difference end position information follow, followed by the difference information data which is the main body, and finally the difference information end code in HTML format. Here, the difference start position information is a pointer of the position where the information starts in the HTML format, and the difference end position information is represented by the number of bytes from the pointer. Next, the attached file format will be described. The attached file format is a format used for image data in page information, for example. In the case of the attachment file format, the difference information start code of the attachment file format is first attached, followed by the attachment file parameter, the attachment file information data which is the main body, and finally the difference information end code of the attachment file format. Here, the start code and the end code are tags, and the attachment file parameter is various information about the attachment file such as the file name of the image data file on the client to be replaced. The attached file information data is the latest image data or the like to be updated.

FIG. 6 shows the types of difference information data in the character information. First, when the data is changed, the changed data is created as difference information data (6
3). In this case, the number of characters may be different before and after the change. The second is the case where a part that did not exist originally is added, and the additional data is created as difference information data (6
4). Third, when data is deleted, NULL information indicating that there is no data is created as difference information data (65). The automatic update processing application program downloaded to the client side recognizes the type of the difference information data and edits the data accordingly.

FIG. 7 schematically shows transmission of difference information data. The difference information data transmitted from the server side includes, for example, several records of difference information data in HTML format and several records of difference information in attached file format. The length of each record may be different. When there are n records to be updated, n lines of difference information data are collectively sent in one file.

FIG. 8 schematically shows the page information updating process of the client. Upon receiving the difference information data transmitted from the server side, the client sends the data to a unique application program for updating page information, which is preinstalled on the client side. The application program performs edit processing that reflects the difference in the page information file on the client side, combines the updated document and the attached file, and passes it to the web browser. In a web browser,
Display the updated display contents on the display.

FIG. 9 shows the processing procedure of the automatic update processing application program. The automatic update processing application program is a client-specific application program for displaying the received data on the display after the client receives the difference information data from the server. The client receives this application program from the server at the time of the first page information browsing request, installs it as a browser plug-in function, and makes it resident in memory. Then, using this application program, the update data sent from the server can be always received and displayed.

First, the client connects to the network (80). Next, when the difference information data is received from the server (81), the held page information being displayed and the received difference information data are combined to edit the file (82). This editing replaces the held data with the contents of the difference information file and updates it. If the difference information file is in the HTML format, from the difference start position to the difference end position of the held data,
Replace with the difference information data. The latest file containing the replaced data is saved as an updated document file as a local file on the client side. When the difference information file is in the attached file format, the attached file is saved as a local file on the client side, and the attached file name is added to the reference file name in the page information. When there are a plurality of updated parts, the editing process is repeated a plurality of times for each record unit of the difference information data. Further, the automatic update processing application program designates the updated file to the web browser and causes a display update event (8
3). The web browser loads the specified file and updates the display contents with the latest contents. Finally, the connection is terminated (84).

The embodiment of the present invention has been described above.
The data updating method of the present invention has the uses described in the embodiments,
The configuration and conditions are not limited, and various changes can be made.

For example, an automatic update processing application
The program may not be dynamically installed when first accessed, but may be distributed and installed in advance to a known client.

Further, the data update frequency, the update data amount,
The content of transmission data and the timing of transmission may be adjusted as appropriate according to the need for real-timeness.

Further, the target network is not limited to the intranet, but may be the Internet connected to the internal and external systems.

The present invention can also be applied to a fault monitoring system of higher urgency. In the manufacturing process, if a device failure occurs, it is necessary to immediately deal with it, so that the failure monitoring system has a high need to update the page information in real time. Other than this, server /
INDUSTRIAL APPLICABILITY The present invention can be applied to various systems in which the relationship between clients can be easily grasped and which requires real-time update display of information.

[0046]

As described above, according to the present invention, the latest data is transmitted to the client side at the timing when the page information is actually updated on the server side. Therefore, it is possible to update information in real time while suppressing an increase in traffic. It will be possible.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the present invention.

FIG. 2 is a schematic configuration diagram of a system to which the present invention is applied.

FIG. 3 is a procedure for updating data according to the present invention.

FIG. 4 Client information table

FIG. 5: Data format of difference information

FIG. 6 Types of difference information data

FIG. 7: Transmission of difference information data

FIG. 8: Client page information update processing

FIG. 9: Processing procedure of automatic update processing application program

FIG. 10: Conventional page information acquisition and update method

FIG. 11: Output screen of schedule management system

[Explanation of symbols]

1 Client A 2 servers 3 page information 4 browsing client information 12 production line 14 Manufacturing process management system 17 Dispatcher server 20 factory monitoring system 21 Client 30 Initial procedure processing 31 Real-time update processing 32 End procedure processing 40 Image information in auxiliary storage 41 Session information in main memory 72 Difference information data

Continued front page    (72) Inventor Kazuhiko Akita             3-2-1 Sakado, Takatsu-ku, Kawasaki City, Kanagawa Prefecture               Fujitsu LSI Technology Co., Ltd.             Within (72) Inventor Toshinori Hattori             3-2-1 Sakado, Takatsu-ku, Kawasaki City, Kanagawa Prefecture               Fujitsu LSI Technology Co., Ltd.             Within (72) Inventor Yoichi Yato             3-2-1 Sakado, Takatsu-ku, Kawasaki City, Kanagawa Prefecture               Fujitsu LSI Technology Co., Ltd.             Within (72) Inventor Toshihiro Nakakuki             3-2-1 Sakado, Takatsu-ku, Kawasaki City, Kanagawa Prefecture               Fujitsu LSI Technology Co., Ltd.             Within F term (reference) 5B082 GA04 GA14 HA05

Claims (10)

[Claims] 1. In a system for transmitting page information from a server to a plurality of clients and displaying the page information at each client, the server recognizes a client who is browsing a specific page, and when the page information is updated. A method for updating page information, characterized in that updated page information data is transmitted to the client being browsed, which is recognized by the server. 2. The page information updating method according to claim 1, wherein the server has information regarding a client who is browsing a specific page. 3. The page information updating method according to claim 2, wherein the information regarding the client being browsed includes identification information of each client, identification information of a browsing target page of the client, and the browsing target page of the client. A page information updating method comprising at least information of access start time. 4. The page information updating method according to claim 2, wherein the information regarding the client being browsed is acquired by the server when the server receives a browsing request from the client. . 5. The page information updating method according to claim 1, wherein the updated page information transmitted to the client is only difference information data with respect to page information before updating. Method. 6. The page information update method according to claim 5, wherein the server sends an application that edits the difference information data and displays updated page information to the client. Characteristic page information update method. 7. A system for transmitting page information from a server to a plurality of clients and displaying the page information at each client, wherein at least the identification information of the client and the identification information of the browsing page are displayed when the client is connected to the network. Acquired and registered in the browsing client information, and when the page information on the server is updated, a client that is browsing the page is searched from the browsing client information, and the updated page information is transmitted to the client. And a process of receiving the transmitted page information and displaying the page update information by the client, the page information updating method. 8. The page information updating method according to claim 7, wherein the process of displaying the page updating information is performed by a dedicated program for displaying the page updating information in a data format having a specific agreement. How to update page information. 9. A system for transmitting page information from a server to a plurality of clients and displaying the page information at each client, wherein the server recognizes a client who is browsing a specific page, and the page information is updated. A page information update system, wherein updated page information data is transmitted to the browsing client recognized by the server. 10. A system for transmitting page information from a server in a management system on a manufacturing line to a plurality of clients and displaying the page information on each client, wherein the server recognizes a client who is browsing a specific page. Then, when the page information is updated, the updated page information data is transmitted to the browsing client recognized by the server.