JP2002207631A - Relaying device for network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a relaying device for a network which can substantially increase the display speed of caching data of a client-side display device and quickly access desired data. SOLUTION: This device is equipped with a file storage means (cache file storage part 105) which stores text data received through a network as a file and a data processing means (main control part 107, grammar analysis part 103, automatic update part 106, and specific program) which rewrites the text data stored in the file storage means so that the amount of display information of one picture on a display device (D) of a network terminal device (client terminal device 200) increases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for storing network contents such as homepage data in a relay device of a network represented by the Internet.

[0002]

2. Description of the Related Art Conventionally, WWW (Worl) on the Internet
d Wide Web) often manages content data obtained on the client's personal computer (hereinafter referred to as a personal computer).
In order to reduce the actual amount of access to the WWW server,
Management of data cache (storage) is performed on the server side (for example, proxy server).
A cache system in which the data is stored in cache means on the server side (for example, a hard disk of a computer constituting the server) has been considered.

[0003] By providing a memory management function in the proxy server, a response to similar access can be returned without passing through the server, thereby improving network traffic and substantially shortening the connection time. Can be.

Conventional techniques related to such a network cache system (relay device) are disclosed, for example, in "Internet terminal device" disclosed in Japanese Patent Application Laid-Open No. Hei 10-307780 and in Japanese Patent Application Laid-Open No. 2000-13445. "Method of Generating Device Page When Device Not Supporting Predetermined Protocol When Connecting to Home Network", "Mobile Packet Routing System" disclosed in Japanese Patent No. 2894443, Patent No. 3001
No. 490, “LAN terminal and packet transfer method” has been proposed.

[0005] The above "Internet terminal device" reads out desired data from any one of the plurality of servers via a line and displays the data when a plurality of servers on the Internet are linked to each other. An operation unit for inputting a link address linked to data currently displayed on the display unit, and an Internet terminal device displaying the link address and the server data corresponding to the link address in advance. A storage unit that stores the data in association with the link address input from the operation unit, and a display control unit that reads the data read from the storage unit and displays the read data on the display unit. The link address and the server data corresponding to the link address are stored in the storage unit in advance. When the link address is input from the operation unit, the data of the server corresponding to the link address is read from the storage unit by the display control unit, and the read data is displayed on the display unit. This eliminates the need to read data from the device, thereby reducing the line connection waiting time.

The above-mentioned “method of generating a device page when a device that does not support a predetermined protocol is connected to a home network” is a home network in which a client device and a plurality of server devices are connected.
In the method of generating a device page using a web browser in the client device, a step of determining whether the device supports the protocol requested by the client device by accessing the plurality of devices, and determining a desired protocol. If the device is a supported device, a corresponding Internet protocol address is provided through a predetermined Internet protocol address passing process, and if the device is not a supported device, the client device provides a predetermined address. Generating a device page for indicating the plurality of devices. Accordingly, when the device that does not support the predetermined protocol is connected to the home network, the method of generating a device page according to the present invention determines the device that does not support the predetermined protocol so that the user can identify the device and appropriately identify the device. Can respond.

On the other hand, the "mobile packet routing system" has an ATM (Asyncronous Transfer Mode) network in which an ATM switch, an ATM router provided between subnets, and an ATM host which is a mobile terminal moving across subnets. ARP that resolves and outputs the destination ATM address based on the IP address
(Address Resolution Protocol) server and AT
An ATMAR prepared for each subnet based on IP over ATM specifications, comprising a home agent existing in a subnet of the home of the M host.
The P server manages the correspondence between the ATM address and the IP address of the ATM router or the ATM host existing in the subnet, and manages the MOBILE IP (RFC20).
02, based on the specification of RFC: Request for comment (RFC), a home agent prepared for each subnet is assigned a fixed IP address of an ATM host having this subnet as a home and a variable I assigned when moving between subnets.
It is provided in a system configuration for managing a correspondence relationship with a P address. When an ATM host moves across subnets, a correspondence between a newly acquired IP address and its own fixed IP address is registered in the home agent ( / Canceled), the home agent uses this fixed I
It has a function of registering (/ cancelling) the correspondence between the P address and its own ATM address in the ATM ARP server. Thereby, when the ATM host moves to a subnet other than the home, the AT
An IP packet indicating the fixed IP address of the M host is transferred to the ATM host via the home agent, so that IP over ATM and MOBIL
By operating E IP in cooperation, the movement of the ATM host across subnets can be realized, and the QoS control specific to the ATM can be performed by the application.

Further, the above-mentioned "LAN terminal and packet transfer method" is characterized in that the wired LAN terminal includes a sub-network connection detecting means for detecting connection to the sub-network and a sub-network connection detecting means for detecting connection to the sub-network. Registration signal transmitting means for transmitting a registration signal,
A registration signal is transmitted when connection to a home network or a remote network is detected. Upon receiving the registration signal, the remote server sets up a packet transfer path with the home server and starts packet transfer if the LAN terminal that has transmitted the registration signal has not been registered. Continue packet transfer to and from. The home server, when receiving the registration signal, terminates the packet transfer with the remote server if the LAN terminal that has transmitted the registration signal has not been registered. Thereby, the wired LAN terminal can start packet transfer between the home network and the remote network immediately after connecting to the remote network of the movement destination, and when moving from the remote network to the home network, The packet transfer between the home network and the remote network can be immediately terminated.

[0009]

By the way, network contents such as Internet homepage data have been developed for image files (for example, GIFs) having a relatively large data capacity with the development of contents creation and editing technologies.
Format and JPEG format) tend to increase. For this reason, there has been a problem that the display speed on the client-side display device is not sufficiently improved even when the above-described caching technique is used.

[0010] That is, since the data capacity of the content constituting one screen is large, the total of the case where the caching data is downloaded by accessing the proxy server and the case where the data is actually downloaded by accessing the net are totaled. The situation that such time does not change so much occurs, and there is a problem that the significance of providing the proxy server is partially reduced.

When the content has a hierarchical structure as shown in FIG. 3, for example, when the caching data (Client.html, 1.html, 2.gif) of the highest hierarchy is accessed. In this case, only the data is displayed on the display device on the client side, and the data (3.html, 4.html, 5.html) of the lower hierarchy is not yet displayed. Therefore, for example, in order for the client to view the data of 5.html, it is necessary to follow a number of links, and there is a problem that it takes time and effort. That is,
Even if the data is stored as caching data in the proxy server, there is an inconvenience that the client cannot directly and quickly access the target data (5.html in the above example).

In particular, when a large number of tags linking to a plurality of contents and URLs are embedded by making use of the characteristics of the hypertext, unless the data is traced to the layer where the tags exist, the target contents or URLs are not obtained. There was a problem that I could not jump.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is intended to substantially improve the display speed of caching data on a display device on the client side and to quickly access desired data. It is an object of the present invention to provide a network relay device that can be used.

[0014]

In order to achieve the above object, a file storage means (cache file storage unit 105) for storing text data received via a network as a file, and a file stored in the file storage means. Data processing means (main control unit 107, grammar analysis unit) for rewriting the text data so that the amount of display information on one screen of the display device (D) in the network terminal device (client terminal device 200) increases. 103, an automatic updating unit 106 and a predetermined program).

[0015] According to this, since the amount of information displayed on one screen of the display device on the network terminal device side is increased as compared with the case of directly accessing the network, the time for accessing the same content is substantially reduced. can do. That is, for example, when there are five contents to be displayed, when accessing the network, three contents are displayed on one screen, and the remaining two contents are displayed on the next page or a link destination. By automatically rewriting the hypertext described so as to display five contents on one screen by the data processing means, the client follows the link to display the content. It is possible to quickly access the target content without the hassle.

[0016] The text data received via the network can be data in a predetermined format including link information transmitted and received on the Internet. As a result, the WWW (World Wi
It is possible to substantially reduce the time required to browse various homepages of "de Web".

The data processing means extracts link information from text data of a predetermined format including link information received via a network, and a predetermined number of the link information is included in one of the display devices in the network terminal device. The text data may be rewritten so as to be displayed on the screen. This makes it possible to quickly access the target content.

Further, the link information may be address information of an information source used on the Internet. Thereby, for example, a desired URL (Uniform
Resource Locator) information enables quick access to the target content.

Further, the link information may be link information of an e-mail address transmitted and received via the Internet. As a result, it is possible to quickly access a target e-mail address.

In the case where the text data transmitted / received via the network has a hierarchical structure, the data processing means rewrites the text data so that data existing in a lower hierarchy is moved to an upper hierarchy. You may. As a result, the amount of information displayed on one screen can be increased, so that the time for accessing the target content can be substantially reduced.

The text data is HTML (H
yperText Markup Language) format or XML (eXtensib)
le Markup Language) format.
Thereby, the hypertext used as a standard in the WWW can be processed and can be browsed by a general browser.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing a schematic configuration of a cache system including a network relay device according to the present embodiment.

The network content caching system CS according to the present embodiment is a WWW of the Internet.
(World Wide Web), a cache server 100 as a relay device of a network, and a cache server 10 via a local area network (LAN).
0 and a plurality of client terminal devices (network terminal devices) 200 connected thereto.

The cache server 100 is composed of a personal computer or a workstation-class computer having an environment for connecting to the Internet. The cache server 100 includes a GUI (Graphical User Interface) processing unit 101 that analyzes an operation content (event) input by a user of the client terminal device 200,
A protocol processing unit 102 for transferring data and the like to the client terminal device 200; a grammar analysis unit 103 for analyzing transferred data such as a homepage or the like (HTML (HyperText Markup Language) sentence or XML (eXtensible Markup Language) sentence); Screen display unit 10 for displaying data analyzed by analysis unit 103 on a display device such as a CRT
4. It has a cache file storage unit 105 composed of a storage device such as a hard disk, an automatic update unit 106 for automatically promoting a cache file, a main control unit 107 for generally controlling these units, and the like. .

When it is not necessary for the cache server 100 to display the contents of the cache file, the screen display unit 104 may be omitted.

The GUI processing unit 101, the protocol processing unit 102, the grammar analysis unit 103, the automatic update unit 10
6. The main control unit 107 and the like
Can be configured with a CPU and required software, etc. included in the system.

The cache file stored in the cache file storage unit 105 is stored in the client terminal device 20.
HTML as hypertext corresponding to the content of the homepage on the WWW accessed by the web browser
Statement or XML statement.

The client terminal device 200 is composed of a personal computer or the like, has at least a display device D such as a CRT and a connection device to a LAN in terms of hardware, and has at least an HTML or XML sentence in terms of software. Possible web browser software has been introduced.

The grammar analyzer 10 of the cache server 100
3 is a cache file (HT as hypertext) stored in the cache file storage unit 105.
Analyze the ML sentence or XML sentence and link information (U
RL information). Specifically, for example, HT
In the case of the ML sentence, a so-called “A tag” (eg, <A HREF=“URL”>, <A HREF
= ”Noun”>, <A HREF=”mailto:email address”>)
Or a tag that specifies the address (<ADDRESS> address </ AD
DRESS>) to extract link information.

Then, the main control unit 107 and the automatic updating unit 106 display the extracted link information on one screen of the display device of the client terminal device 200 based on the analysis result by the grammar analysis unit 103. And rewrites the HTML sentence or the like of the cache file.

An embodiment in which such rewriting is performed will be described with reference to FIG.

FIG. 4A shows the client terminal device 20.
0 shows a state in which the cache file (the data itself on the WWW) before rewriting is displayed as it is on the display device D of No. 0. In this example, the link information of the tag 1 and the tag 2 is embedded, and when the user of the client terminal device 200 performs an operation (mouse click or the like) to specify the tag 1 and the tag 2 by operating the mouse or the like.
The linked data L1 and L2 can be accessed. However, tags 3 to 5 indicating other link destinations could not be accessed without scrolling the screen or moving to the next page to display the screen D ′.

On the other hand, the client terminal device 20
0 reads the cache file rewritten by the cache server 100, as shown in FIG. 4B, in addition to the tags 1 and 2, the tags 3 to 5 are displayed on one screen, and the link is displayed. It is also possible to quickly access the preceding data L3, L4, L5 (in this example, L4, L5 indicate contents on the WWW).

Therefore, for example, the contents intended by the user of the client terminal device 200 are L3, L
4 or L5, the rewritten cache file can be accessed in a shorter time than the non-rewritten original file, and the time until the access can be substantially reduced.

The grammar analysis unit 103 analyzes the cache file by another method, for example, when it analyzes that the original cache file has a hierarchical structure as shown in FIG. In the hierarchy of "Client.html,
1.html, 2.gif, 3.html ”in the second layer is“ 4.htm
l ”and“ 5.html ”respectively in the third hierarchy), the main control unit 107 and the automatic update unit 10
Reference numeral 6 rewrites the hypertext such as an HTML sentence so that the contents (in this example, “4.html” and “5.html”) existing below the highest level move to the highest level.

An embodiment in which such rewriting is performed will be described with reference to FIG.

FIG. 5A shows the client terminal device 20.
This shows a state in which the cache file (data itself on the WWW having the configuration shown in FIG. 3A) before rewriting is displayed as it is on the display device D of No. 0. In this example, the HTML statement "Client.html, 1.html, 2.gif, 3.ht
Based on "ml", only contents 1 to 3 are displayed on one screen D1. Therefore, in order to browse other contents 4 and 5, for example, operations such as scrolling the screen or moving to the next page are performed on the client terminal device 2.
00 users have to do.

On the other hand, the client terminal device 20
0 reads a cache file (a file having the configuration shown in FIG. 4B) rewritten by the cache server 100, as shown in FIG. 5B, all of the contents 1 to 5 are displayed on one screen D2. Since it is displayed, operations such as scrolling the screen and moving to the next page are not required, and the time until access can be substantially reduced.

In the above description, the case where the network content is described in the HTML sentence has been described.
However, the present invention is not limited to this, and can be applied to a case where it is described in another language such as an XML sentence.

The link information specified by the tag may be link information of an e-mail address. In this case, the target electronic mail address can be quickly accessed by rewriting the cache file.

In this embodiment, a case has been described in which data of a WWW homepage on the Internet is handled as network content. However, the present invention is not limited to this, and may be applied to content obtained by accessing other networks. It is possible.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof. Of course.

[0044]

According to the present invention, a file storage means for storing text data received via a network as a file, and one screen of a display device in a network terminal device relating to the text data stored in the file storage means. And a data processing means for rewriting the text data so as to increase the amount of display information of the network terminal device is displayed on one screen of the display device of the network terminal device as compared with the case of directly accessing the network. Since the amount of information increases, there is an effect that the time for accessing the same content can be substantially reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a cache system including a network relay device according to an embodiment;

FIG. 2 is an explanatory diagram showing display examples before and after rewriting a cache file.

FIG. 3 is an explanatory diagram showing a hierarchical configuration before a cache file is rewritten.

FIG. 4 is an explanatory diagram showing a hierarchical configuration after rewriting a cache file.

FIG. 5 is an explanatory diagram showing another display example before and after rewriting a cache file.

[Explanation of symbols]

CS Cache system including a relay device of a network 100 Cache server (relay device of network) 101 GUI processing unit 102 Protocol processing unit 103 Grammar analysis unit 104 Screen display unit 105 Cache file storage unit 106 Automatic update unit 107 Main control unit 200 Client terminal Device D Display device

Claims (8)

[Claims] 1. A cache file storage means for storing text data in a predetermined format including link information received via the Internet as a cache file in a cache area, and a cache file storage means for storing data stored in the cache area of the cache file storage means. Data processing means for extracting link information from the text data and rewriting the text data so that a predetermined number of the link information is displayed on one screen of a display device in the network terminal device. Network relay device. 2. A file storage means for storing text data received via a network as a file, and a text information stored in the file storage means is provided with a display information amount of one screen of a display device in a network terminal device. Data processing means for rewriting the text data so that the text data is increased. 3. The network relay device according to claim 2, wherein the text data received via the network is data of a predetermined format including link information transmitted and received on the Internet. 4. The data processing means extracts link information from text data of a predetermined format including link information received via a network, and a predetermined number of the link information is included in the display device of the network terminal device. 4. The network relay device according to claim 2, wherein the text data is rewritten so as to be displayed on one screen. 5. The network relay device according to claim 2, wherein the link information is address information of an information transmission source used on the Internet. 6. The network relay device according to claim 2, wherein the link information is link information of an electronic mail transmitted and received via the Internet. 7. When text data transmitted / received via a network has a hierarchical structure, the data processing means rewrites the text data so that data existing in a lower hierarchy is moved to an upper hierarchy. The network relay device according to any one of claims 2 to 6, wherein: 8. The text data may be HTML (HyperTe
xt Markup Language) format or XML (eXtensible Mar)
The network relay device according to any one of claims 2 to 7, wherein the relay device is described in a kup language (Kup Language) format.