JPH10301832A - Hyper media document look-ahead device and recording medium therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the increase of the load on a whole system when the look-ahead of data intended by a user is not operated at the time of the look- ahead of scene data by predicted information. SOLUTION: A hyper media document terminal device 3 is connected to a hyper media document server 1, and scene data are acquired and displayed at a display device 9. The hyper media document terminal equipment 3 which receives the look-ahead instruction of the next scene decided by a user waits for the completion of the reading of present scene data, and acquires the next scene data from the hyper media document server 1. The user reads the present scene, and then transmits a look-ahead document display instruction to the hyper media document terminal equipment 3, and the next scene is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hypermedia document prefetching apparatus and a program recording medium thereof, and more particularly, to a hypermedia document prefetching apparatus in a hypermedia document client and a program recording medium thereof.

[0002]

2. Description of the Related Art A hypermedia document prefetching apparatus is used for prefetching scene data in parallel with browsing, especially when reading scene data into a hypermedia document display apparatus on the Internet.

A conventional hypermedia document prefetching apparatus determines scene data to be prefetched in accordance with next display prediction information and priority for each scene data.

For example, according to Japanese Patent Laid-Open Publication No. Hei 8-87526, the above-described hypermedia document prefetching apparatus uses a link selection probability obtained from a past use frequency and a distance from a scene requested to be displayed. Find relevance,
This is a device for transferring a highly relevant scene to the client device in advance, and is composed of the following three means.

(1) Use frequency update storage means for updating and storing the use frequency of a link.

(2) Scene selection means for selecting a scene having a high degree of relevance from the link selection probability obtained from the use frequency and the distance from the displayed scene.

(3) Pre-transfer means for pre-transferring the selected scene to the client machine.

[0008] This hypermedia document prefetching device comprises:
As shown in FIG. 3, the button / link history update unit 31a in the hypermedia document display terminal 31 automatically updates the frequency of use for a scene for which a document display request has been made, and stores the updated data. I do.

On the other hand, the pre-transfer scene determination unit 32a of the hypermedia document server 32 obtains a selection probability Pi for each link from the use frequency data, and determines the selection probability Pi and the distance Le from the requested scene. Is used to calculate the relevance value Vi.

Then, a scene having a high relevance value Vi is determined to be a pre-transfer scene, and the hypermedia document display terminal 3
Pre-transfer to 1.

[0011]

The above-mentioned conventional hypermedia document prefetching apparatus has the following problems.

The first problem is that unnecessary traffic in the network increases due to the prefetch data that has not been hit. The reason is not only that the hit rate is not 100% because it depends on the past frequency of use, but also that the amount of data of the past frequency of use is not enough or that the scene is not automatically selected. This is because the hit rate is greatly reduced depending on the method.

A second problem is that a large amount of resources are required to resolve a decrease in response due to an increase in load on the hypermedia document server. The reason is that all of the scene selecting means and the use frequency updating means are processed by the hypermedia document server, and the use frequency data of the scene is held on the hypermedia document server side.

A third problem is that the load on the client increases and requires a lot of resources. The reason is that data of a scene that does not hit is also stored.

A fourth problem is that a maintenance man-hour in the server is required. The reason is the maintenance of the usage frequency management area accompanying the addition or deletion of scenes,
Also, it is necessary to set a threshold value.

A fifth problem is that there is a case where read-ahead is not performed at all. The reason is that the scene selecting means does not look ahead when the calculated relevance is lower than the set threshold, but does not prefetch anything when all the relevances are lower than the threshold.

Accordingly, it is an object of the present invention to provide a hypermedia document prefetching apparatus which realizes the following items and a program recording medium for the apparatus.

(1) In the conventional hypermedia document prefetching device, the scene selection means and the use frequency update storage means have a large adverse effect on the entire system. Therefore, by eliminating these means, the size and weight of the system can be reduced. Measure.

(2) The user selects the scene to be prefetched, thereby reducing the load on the network server and eliminating the rereading of data that did not hit to speed up the processing.

(3) The transmission efficiency is improved by eliminating "unreferenced scenes" generated in the scene selection means and reducing unnecessary traffic to zero.

(4) By eliminating the above-mentioned "unreferenced scene", the adverse effect on the system due to unnecessary data is eliminated, the failure occurrence rate is reduced, and the reliability is improved.

(5) The use frequency management area becomes unnecessary, and maintenance for the use frequency management area is eliminated.

[0023]

According to the present invention, there is provided a hypermedia document prefetching apparatus for storing scene data of a hypermedia document and transmitting the scene data in units of scenes according to a request, and acquiring and displaying arbitrary scene data. And a hypermedia document client for temporarily storing the scene data sent from the hypermedia document server when the next scene data is sent to the hypermedia document server and displaying the scene data according to an arbitrary instruction. ing.

Further, in the hypermedia document pre-reading device of the present invention, the hypermedia document client stores a display device for displaying arbitrary scene data, a currently displayed scene data, and a scene data to be displayed next. A storage device, transmitting a request to the hypermedia document server, receiving scene data corresponding to the request, storing the scene data in the storage device, reading scene data from the storage device in accordance with an arbitrary instruction, and displaying the scene data on the display device And a hypermedia document terminal for requesting the hypermedia document server to acquire the next scene data to be displayed when any scene data is displayed, and the storage device via the hypermedia document terminal. And the display Comprising an input device for inputting instruction information for accessing the hypermedia document server controls the location.

Further, in the hypermedia document pre-reading device of the present invention, the hypermedia document terminal device transmits a request to the hypermedia document server and receives scene data corresponding to the request; According to the instruction information obtained from the device, a request to the hypermedia document server is generated and sent to the communication control unit, the scene data received by the communication control unit is written to the storage device, and the scene data is stored from the storage device. A main control unit for reading and displaying on the display device and a request for scene data to be displayed next when any scene data is displayed are generated and sent to the communication control unit, and the communication control unit receives the request. This scene data is written to the storage device, and the And a prefetch control unit for displaying the scene data read to the display device according to indicate information.

Further, in the hypermedia document prefetching device according to the present invention, the storage device includes a scene data storage area for storing the currently displayed scene data and a prefetch cache area for storing the scene data to be displayed next. Prepare.

A recording medium storing the hypermedia document prefetching program of the present invention includes a communication control program for transmitting a request to a hypermedia document server and receiving scene data corresponding to the request, and a command obtained from an input device. A request to the hypermedia document server is generated according to the information and sent to the communication control program, the scene data received by the communication control program is written to a storage device, the scene data is read from the storage device, and displayed on a display device. A main control program and a request for scene data to be displayed next when any scene data is displayed are generated and sent to the communication control program, and the scene data received by the communication control program is stored in the storage device. Write, input And a prefetch control program to be displayed on the display device reads the scene data in accordance placed et indication information.

That is, the hypermedia document prefetching device of the present invention operates only on the client device in the client / server system, the user specifies the next scene to prefetch, and reads the next scene data while the user is browsing the current scene data. Obtain from server. Specifically, after the acquisition of the current scene data is completed, the next scene data designated by the user is acquired and stored in the storage area.

Therefore, the hypermedia document client requests the next scene data specified by the user from the hypermedia document server after waiting for the end of the acquisition of the current scene data. Therefore, the next scene data can be pre-read only by applying to the hypermedia document client without interrupting the browsing of the current scene data.

Further, the data to be distributed is only data requested by the user, and the pressure on network resources, server resources, and client resources due to unnecessary data is eliminated, so that it is possible to construct a system with a low budget. Moreover,
Since traffic on the network decreases, a highly responsive system can be constructed.

Further, the use frequency update storage means and the scene selection means in the hypermedia document server become unnecessary, and the maintenance of these required management areas is eliminated, so that the maintenance work in the hypermedia document server is reduced.

[0032]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the present invention. In the figure, first, the hypermedia document prefetching device is constituted by a hypermedia document client 2 in a client / server type system.

The hypermedia document client 2
A hypermedia document terminal device including a communication control unit 6 that controls communication with the hypermedia document server 1, a main control unit 5 that manages processing of commands input by a user and other control units, and a prefetch control unit 4. 3, an input device 7 such as a mouse and a keyboard for inputting various commands from the user to the hypermedia document terminal device 3, a prefetch cache area 8b for storing prefetched next scene data, and scene data storage for storing scene data. A storage device 8 including an area 8a and a display device 9 for displaying scene data stored in the scene data storage area 8a are included.

The main control unit 5 in the hypermedia document terminal device 3 connects to the hypermedia document server 1 through the communication control unit 6 and acquires the data of the first scene. The data is displayed on the display device 9 in the order of acquisition. When the document amount of this scene is large, the user determines the next scene while reading the document. Then, the user sends a prefetch command to the hypermedia document terminal device 3 by pressing the button of the next scene.

The prefetch control unit 4 in the hypermedia document terminal device 3 checks with the main control unit 5 to check whether data of the current scene is being read. If data is being read, wait until the data is read. If the data is not being read, the data of the next scene is requested to the hypermedia document server 1. Then, the hypermedia document server 1 transfers the data of the next scene to the hypermedia document terminal device 3.

The prefetch control unit 4 fetches the data of the next scene into the prefetch cache area 8b. Thereafter, the user presses a next scene display button to display the next scene, and sends a pre-read document display command to the hypermedia document terminal device 3. Then, the next scene data in the prefetch cache area 8b is moved to the scene data storage area 8a and displayed on the display 9.

FIG. 2 is a flowchart showing the operation of the above hypermedia document prefetching apparatus.

In step 21, data of the current scene is obtained and displayed. Usually, in the first connection, a specified head scene is acquired.

In step 22, the user determines the next scene while browsing the acquired and displayed scene, and presses the link button.

In step 23, the look-ahead device inquires of the main control unit whether or not data of the current scene is still being acquired. If the data of the current scene is being acquired, the process waits until the acquisition is completed.

In step 24, the data of the next scene sequentially received is stored in the cache area, but is not displayed.

In step 25, the user who has finished reading the current scene presses the next scene display button.

In step 26, the pre-read data is moved from the pre-read cache area to the scene data storage area, and thereafter, this is handled as the current scene data.

The processing functions of the above-described hypermedia document prefetching apparatus are realized by a program. That is, the hypermedia document prefetching program transmits a request to the hypermedia document server and receives a scene data corresponding to the request, and a request to the hypermedia document server according to the instruction information obtained from the input device. A main control program for generating and sending the data to the communication control program, writing scene data received by the communication control program to a storage device, reading scene data from the storage device and displaying the scene data on a display device, and displaying any scene data During the operation, a request for the next scene data to be displayed is generated and sent to the communication control program, and the scene data received by the communication control program is written into the storage device, and the request is sent in accordance with instruction information from the input device. C And a prefetch control program for displaying data on the display device reads.

The above-described hypermedia document prefetching program is stored in the program recording medium 10 shown in FIG. 1, and is loaded into the hypermedia document terminal device 3 at the time of execution, thereby exhibiting the intended function.

[0047]

As described in detail above, the hypermedia document prefetching apparatus and its recording medium according to the present invention have the following effects.

The first effect is that network traffic can be reduced and a highly responsive system can be constructed. The reason is that when the user selects the next document while browsing the document, the prefetching of the document not viewed is prevented, and the hit rate of the prefetched data is set to 100%.

The second effect is that resources required for the hypermedia document server can be reduced, and a system can be constructed with a low budget. The reason is that, since the scene is determined by the user himself, the use frequency update storage means and the scene selection means in the hypermedia document server become unnecessary.

A third effect is that resources required for the hypermedia display device can be reduced, and a system can be constructed with a low budget. The reason is that the acquired data is 100%
This is because it is not necessary to hold the data of the scene that does not hit because of the hit ratio.

A fourth effect is that the number of maintenance steps in the hypermedia document server can be reduced.
The reason for this is that maintenance of the use frequency management area associated with addition or deletion of scenes is not required, and setting of thresholds and the like are not required.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the present invention.

FIG. 3 is a system configuration diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hypermedia document server 2 Hypermedia document client 3 Hypermedia document terminal device 4 Prefetch control unit 5 Main control unit 6 Communication control unit 7 Input device 8 Storage device 8a Scene data storage area 8b Prefetch cache area 9 Display device 10 Program recording medium

Claims (5)

[Claims] 1. A hypermedia document server for storing scene data of a hypermedia document and transmitting the scene data in scene units according to a request, and transmitting the next scene data to the hypermedia document server when arbitrary scene data is acquired and displayed. A hypermedia document client which temporarily stores the scene data requested and sent by the hypermedia document server and displays the scene data according to an arbitrary instruction. 2. The hypermedia document pre-reading device according to claim 1, wherein the hypermedia document client is configured to display a display device for displaying arbitrary scene data, a scene data currently displayed and a scene data to be displayed next. A storage device for storing, transmitting a request to the hypermedia document server, receiving scene data corresponding to the request, storing the scene data in the storage device, reading scene data from the storage device according to an arbitrary instruction, and reading the scene data from the display device And a hypermedia document terminal device for requesting the hypermedia document server to acquire scene data to be displayed next when any scene data is displayed, and the hypermedia document terminal device via the hypermedia document terminal device. Storage device and display device An input device for controlling the location and inputting instruction information for accessing the hypermedia document server. 3. The hypermedia document prefetching device according to claim 2, wherein the hypermedia document terminal device transmits a request to the hypermedia document server and receives scene data corresponding to the request, According to the instruction information obtained from the input device, a request to the hypermedia document server is generated and sent to the communication control unit, and the scene data received by the communication control unit is written in the storage device, and the scene data is stored in the storage device. A main control unit that reads data and displays the data on the display device; and, when displaying any scene data, generates a request for scene data to be displayed next and sends the request to the communication control unit. The received scene data is written in the storage device, and a finger from the input device is written. A read-ahead control unit for reading out the scene data in accordance with the display information and displaying the read-out scene data on the display device. 4. The hypermedia document prefetching device according to claim 2, wherein said storage device stores a scene data storage area for storing currently displayed scene data and a prefetch cache area for storing scene data to be displayed next. And a hypermedia document prefetching device. 5. A communication control program for transmitting a request to a hypermedia document server and receiving scene data corresponding to the request, and generating a request to the hypermedia document server according to instruction information acquired from an input device. A main control program for sending to a communication control program, writing scene data received by the communication control program to a storage device, reading scene data from the storage device, and displaying the scene data on a display device;
When any scene data is displayed, a request for the next scene data to be displayed is generated and sent to the communication control program, and the scene data received by the communication control program is written into the storage device, and the input device And a read-ahead control program for reading out the scene data in accordance with the instruction information from the computer and displaying the read-out scene data on the display device.