KR100624142B1 - Gateway apparatus and method for wireless data service - Google Patents

Abstract

The present invention relates to a gateway device for eliminating a transmission time delay through minimizing the amount of transmission data in a communication section, and a wireless data service processing method in the gateway device. The web document is parsed to convert the web document. Content converting means for processing, converting an image constituting the web document, and compressing text in the web document; Cache management means for storing a web document having a high possibility of re-request in advance and managing the stored web document; And converting / compressing the web document by transmitting the received web document to the content converting means by transmitting the received web document to the cache managing means or the web server according to a web document request from a terminal. If the web document is transmitted to the terminal and the web document received from the web server is parsed and the image is included in the web document, image data is requested to the web server in advance and received and stored in the cache management means. Server control means for converting the pre-stored image through the content conversion means for the image request to the terminal.

Wireless, data, internet, gateway, cache, landscape, request

Description

A gateway device for wireless data service and a wireless data service processing method in the gateway device {GATEWAY APPARATUS AND METHOD FOR WIRELESS DATA SERVICE}

1 is an exemplary view of a wireless data service network for explaining a wireless data service according to the present invention.

2 is a detailed exemplary view of interworking with a wireless data service network according to the present invention.

3 is a block diagram of an embodiment of a wireless data service system according to the present invention;

4 is a block diagram of an embodiment of a gateway device according to the present invention;

5 is a flow diagram of an embodiment of a wireless data service method in accordance with the present invention.

6 is a flowchart illustrating an embodiment of a gateway device according to the present invention;

7 is a flowchart illustrating an embodiment operation of a content converter according to the present invention;

* Explanation of symbols for the main parts of the drawings

300: gateway device 310: server control unit

311: connection port 312: communication

313: controller 314: web information (URL) preprocessor

315: Web document (HTML) preprocessor 320: Content conversion unit

321: Web document (HTML) conversion processor 322: Text Compressor

323: image conversion processor 330: cache management unit

331: cache controller 332: cache database

340: web server 350: terminal

351: Client Handler 352: Web Browser

360: base station 370: mobile communication exchange

380: Data network matching device

The present invention is a mobile terminal capable of mobile computing and equipped with a web browser (mobile communication terminal, personal mobile communication terminal, wireless call terminal, personal data communication terminal and smart phone, etc.) and a gateway for controlling web information to be transmitted to a wired terminal The present invention relates to a wireless data service processing method in a device and the gateway device, and more particularly, to a web device for compressing and restoring web data and minimizing a data transmission / reception interval in wired / wireless data communication, A computer readable recording medium having recorded thereon a program for implementing the methods.

First, the term wireless data service used in the present invention, by customizing the existing Internet services, etc. in consideration of the limitations of the wireless terminal by using a wireless data service based (IWF: InterWorking Function), anytime, anywhere A service that provides fast web surfing and data exchange.

On the other hand, in the conventional proxy server (which performs a similar function as the gateway device of the present invention), whether the web information request requested by the web browser (terminal) is simply in the cache (or is stored in the cache is valid). After the comparison, the response was sent to a web browser. For this reason, transmitting data to a wireless terminal using a wireless transmission section requires a lot of network time, or due to the limitations of the wireless terminal (limited memory, limited screen size, limited battery capacity, limited input method, etc.) There was concern that it would be impossible or to lose integrity.

Recently, in order to solve the above problems, WAP (Wireless Application Protocol) or WK (Wireless Knowledge) has been promoted for the purpose of establishing wireless Internet standards and developing standard applications (eg, web browsers, gateway servers, etc.).

However, there has been a problem that the recent method as described above is possible only in an integrated connection to a data network and only in a new terminal (eg, a wap phone).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and minimizes the amount of data transmitted in the communication section, and eliminates the transmission time delay by processing the request for the web server on the Internet in advance for the request from the web browser. It is an object of the present invention to provide a gateway device, a wireless data service processing method in the gateway device, and a computer-readable recording medium storing a program for realizing the method.

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According to an aspect of the present invention, a gateway device connected between a network matching device for interworking with a wireless communication network and a web server to provide a wireless data service includes parsing a web document and converting the web document. Content converting means for processing, converting an image constituting the web document, and compressing text in the web document; Cache management means for storing a web document having a high possibility of re-request in advance and managing the stored web document; And converting / compressing the web document by transmitting the received web document to the content converting means by transmitting the received web document to the cache managing means or the web server according to a web document request from a terminal. If the web document is transmitted to the terminal and the web document received from the web server is parsed and the image is included in the web document, image data is requested to the web server in advance and received and stored in the cache management means. Server control means for converting the pre-stored image through the content conversion means for the image request to the terminal.

The present invention also provides a wireless data service processing method in a gateway device which is connected between a network matching device for interworking with a wireless communication network and a web server to provide a wireless data service. Receiving a request for web information (url) from the terminal, a first step of checking whether the information received by requesting the web server and the cache information previously stored in the cache database are valid; In the first step, if the cache information is valid, a second step of converting / compressing a web document stored in the cache database to the terminal; A third step of requesting and receiving a web document from the web server if the cache information is invalid in the first step; The gateway device compresses the web document received from the web server and transmits it to the terminal, parses the web document received from the web server, and requests image data from the web server in advance if an image is included in the web document. Receiving the received data and storing it in the cache database; And a fifth step of, if the image data request is received from the terminal, reading the image data previously stored in the cache database, converting the read image data, and transmitting the read image data to the terminal.

In addition, the present invention, when the gateway server that is connected between the network matching device for interworking with the wireless communication network and the web server to provide a wireless data service, receives a request for the web information (url) from the terminal, by requesting the web server A first step of checking whether the received information and cache information previously stored in the cache database are valid; In the first step, if the cache information is valid, a second step of converting / compressing a web document stored in the cache database to the terminal; A third step of requesting and receiving a web document from the web server if the cache information is invalid in the first step; The web document received from the web server is compressed and transmitted to the terminal, the web document received from the web server is parsed, the image is included in the web document, and the image data is requested to the web server in advance, and the cache is received. A fourth step of storing in a database; And when the image data request is received from the terminal, the gateway device reads the image data pre-stored in the cache database, converts the read image data, and transmits the image data to the terminal. Provide a readable recording medium.

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The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary view of a wireless data service network for explaining a wireless data service according to the present invention, Figure 2 is a specific exemplary view of interworking with a wireless data service network according to the present invention.

First, a user terminal, such as a notebook computer, a wireless terminal, a mobile terminal, a personal mobile communication terminal, and a smart phone, should have its own operating system (OS) and be able to run a general commercial web browser. For this purpose, the operating system is targeted for Windows 95/98 version, but is newly developed through Windows CE, personal data communication terminal (PDA), smart phone, Macintosh operating system and simple program update. Also, if it is not built-in operating system, it can be used by connecting existing computing equipment (laptop computer, etc.) and terminal (wireless data terminal), and web browser and agent ( Minimal memory for Agent) processing.

Next, when the web gateway device for the wireless data service receives the web transmission request from the web browser through the client processor, the web gateway device receives the web contents from the requested web server, converts / compresses the data, and sends the data to the web browser through the client processor. Is the server that sends it. In other words, the gateway server refers to a server that receives web data from a web server for a user's Internet use request and optimizes it for a wireless terminal and transmits the data to the user terminal. Such a gateway device further performs a completely different function from the existing proxy server, which is a compression function and a conversion function for data purification.

On the other hand, the gateway device performs wireless data service infrastructure (IWF) and transmission control protocol / Internet protocol (TCP / IP) matching, and also the transmission control protocol / Internet protocol (TCP) with the Internet network and wireless data center (DNS) server / IP) Perform the matching.

3 is a configuration diagram of an embodiment of a wireless data service system according to the present invention.

The wireless data service system according to the present invention includes a gateway device 300 that manages web content (www: World Wide Web) conversion and a cache, a client processor 351 that performs a proxy function on the terminal 350, and a terminal 350. A mobile communication network for transmitting and receiving data by wirelessly connecting a web browser 352 for processing web information requests according to a user's request, a web server 340 for providing web data on the Internet, and a terminal 350 over a wireless network ( 360 and 370 and a data network matching device 380 for matching the gateway device 300 and the mobile communication switch 370 of the mobile communication network.

Looking at the configuration of the wireless data service system according to the present invention in more detail as follows.

The wireless data service system according to the present invention requests web information (URL) to the gateway device 300 through the wireless communication networks 360 and 370 and the data network matching device 380, and responds to the web information request in response to the web data request. The terminal 350 for restoring and browsing (Web Contents) and the web information request from the terminal 350 are transmitted to the gateway device 300 through the data network matching device 380, and the web data according to the request. Wireless network (360,370) for transmitting to the terminal 350, data network matching device (380) for matching and interworking the wireless network (370,360) and the gateway device 300, web data with high possibility of re-request If the cache information is valid for the request for web information from the terminal 350, the cache is searched to convert / compress the web data or the web information to the web server 340. The gateway device 300 and the web data are stored and converted to reduce the amount of data by converting / compressing the web document, text and image data received by request, and then transmit the web data according to the request of the gateway device 300. It includes a web server 340.

In this case, the gateway device 300 parses a web document together with a cache function using prefetch, and if the image is included in the web document, the gateway device 300 requests and transmits the image data to the web server 340 and stores it. In addition, by performing a prerequest function for converting and immediately transferring an image when an image is requested, the transmission time can be shortened by reducing a data transmission amount and improving a response speed according to data compression. On the other hand, the original web data may be converted / compressed and stored together with the original web data, and then the converted / compressed web data or the original web data may be transferred as the user's option, but the transmission time may be shortened. However, the efficiency may be reduced because it takes up a lot of cache capacity.

Next, referring to the operation of the wireless data service system according to the present invention, the web browser 352 transmits a specific web information request to the gateway device 300 and the server controller 310 in the gateway device 300. Extracts the header information and requests the web information from the web server 340 to compare the received information with information about web data previously stored in the cache, and converts / compresses the data if the web data in the cache is valid. The web data is transmitted to the web browser 352 or the web server 340 is requested. The server controller 310 which has started receiving the response from the web server 340 passes the data to the content converter 320 to transmit it to the web browser 352, and regenerates (converts / compresses) the content converter 320. ), The web data is transmitted to the web browser 352 through the server controller 310.

In this case, the client processor 351 transmits a user option requested by the web browser 352 to the server controller 310 so that the server controller 310 reflects the response when the server controller 310 sends a response, and also transfers it from the server controller 310. It also performs a data restoration function for the received web data. In particular, when the web browser 352 requires only certain user options, the web browser 352 may implement the data restoration function of the client processor 351.

4 is a configuration diagram of an embodiment of a gateway device according to the present invention.

The gateway device 300 according to the present invention, under the control of the server control unit 310, under the control of the content conversion unit 320, the server control unit 310 for performing the conversion / compression for the web data, The cache manager 330 for storing and managing previously retrieved web data with high probability of request and the web data with high possibility of re-request are searched in advance and stored in the cache of the cache manager 330 before the web information request. If the cache information is valid, the cache is searched to convert the corresponding web data from the content conversion unit 320 or to request a web data from the web server to transfer the received web document and text and image data to the content conversion unit 320. ) To control the conversion / compression to reduce the amount of data to include a server control unit 310 for delivery to the terminal.

At this time, the server controller 310 parses a web document along with a cache function using prefetch, requests an image data from the web server 340 in advance, stores the received image data when the next image request is received, and then stores the image request. It performs the prerequest function to convert the time image and deliver it immediately. On the other hand, the original web data may be converted / compressed and stored together with the original web data, and then the converted / compressed web data or the original web data may be transferred as the user's option, but the transmission time may be shortened. However, the efficiency may be reduced because it takes up a lot of cache capacity.

Next, a detailed configuration of the server controller 310, the content converter 320, and the cache manager 330 will be described.

First, the server controller 310 parses a web document, a communicator 312 for transmitting and receiving data with the data network matching device 380, a web server 340, and the like through an access port 311, and displays an image in the web document. A URL preprocessor (314: because the web browser performs an image request soon after receiving a response to the web document) to check whether the web server 340 requests and stores the image data in the cache in advance. An HTML preprocessor 315 for requesting and storing the web server in advance for the most likely re-requested data among the web data, and a controller for controlling the operation of each component and controlling the flow of data. 313 is provided.

In addition, the content conversion unit 320 may grasp and parse the characteristics of the web document (HTML), and the web document (HTML) conversion processor for processing conversion of tags and properties of the web document ( 321), a text compressor 322 for compressing text characters in a web document, and image attributes for web images such as GIF files and JPG files, which are image files constituting the web document. An image conversion processor 323 for reducing the file size SIZE.

The cache manager 330 may further include a cache database (DB) for storing cache data under the control of the cache controller 331 and the cache controller 331 for processing and managing cache data through a hash table. ) 332.

5 is a flowchart illustrating an embodiment of a wireless data service method according to the present invention.

First, the gateway device 300 searches for web data with high possibility of re-requesting in advance and stores it in a cache (501). In this case, the conversion / compression may be stored and the conversion / compression process may be omitted in the transmission process to the terminal 350 later.

Thereafter, when the terminal 350 requests web information (URL) from the gateway device 300 through the wireless communication networks 360 and 370 and the data network matching device 380 (503), the gateway device 300 requests the header of the web information. By extracting the information, the web server requests the web information, receives the information (505), and compares the information with the web data previously stored in the cache to determine whether the web data in the cache is valid (507).

As a result of the determination, if valid, the web data stored in the cache is searched and converted / compressed and transmitted to the terminal 350 through the data network matching device 380 and the wireless communication networks 360 and 370 (509). Requests web information to the server 340, converts / compresses the received web document, text and image data, and reduces the amount of data to be transmitted to the terminal 350 through the data network matching device 380 and the wireless communication networks 360 and 370. (511).

Thereafter, the terminal 350 receiving the web data restores and browses the web data and outputs the web data to the user (513).

In this case, as described above, the gateway device 300 may be implemented so as not to perform the cache function using the prefetch, and if the image is included in the web document by parsing the web document, the web server 340 in advance. It is also possible to perform a prerequest function for requesting image data, receiving and storing the image data, and converting the image data when the image is requested.

6 is a flowchart illustrating an embodiment of a gateway device according to the present invention.

First, the operation of the gateway device as a whole is as follows.

Although not shown in the drawing, the gateway device 300 analyzes cache information periodically or whenever necessary, and independently performs web information (url) requests for major sites to receive web data in advance and store it in a cache. .

Then, when the gateway device 300 receives the web information (url) request from the web browser, the gateway device 300 compares the information received by the request to the web server 340 and cache information to determine whether it is valid. As a result of the determination, if the cache information is valid, the cache is searched, the corresponding web data is converted / compressed and transmitted to the web browser. If the cache information is invalid, the web information url is requested and received from the web server 340.

Subsequently, the gateway device 300 compresses the web document received from the web server 340 and transmits the web document to the web browser, parses the web document received from the web server 340, and grasps the image information in advance to obtain the web server 340. ) To receive image data in advance and store it temporarily.

Thereafter, when the web browser decrypts the received web document and requests image information, the gateway device 300 converts the received image data and transmits the received image data to the web browser.

The operation of the gateway device 300 as described above will be described in detail with reference to FIG. 6.

As shown in the figure, upon receiving a connection request from the terminal 350 through the server's communicator 312 and the connection port 311, the controller 313 reads a web protocol (HTTP) (601) In step 603, the first header information is extracted from the web server 340, and the web information is requested.

Thereafter, by comparing the information received from the web server 340 is cached to determine whether the cache information is valid (605), if it is valid, processing according to the option from the user. That is, after retrieving the web data stored in the cache (607) and generating the header information of the response web data (609), the web data is converted / compressed and transmitted to the terminal 350 (611). On the other hand, if it is not valid, it checks whether the image data has been loaded in advance (613), and if so, retrieves the image data stored in the cache (607), generates header information of the response data (609), and then converts the image data. The terminal transmits the data to the terminal 350 (611).

On the other hand, if the check result 613, the image data is not loaded in advance, the remaining header information is interpreted to request the web document to the web server 340 (615). When the web document is received from the web server 340, the header of the response data is read and parsed to analyze user options and set modes (including those cached) (617), and the received data is converted into a content converter. Turn to 320.

Then, the content conversion unit 320 analyzes the content type and determines the data type from the raw data (619), and if the web document tag or attribute is used, the web document conversion processor 321 retrieves the web document. If the text is converted (627), the text compressor 322 compresses the text (629), and if the image is converted by the image conversion processor 323 (631) and sent to the controller 313, the controller 313 Transmits the converted / compressed data to the terminal 350 through the communicator 312. Then, the client processor of the terminal 350 restores the received data and delivers it to the web browser.

On the other hand, if the determination result 619, a web document tag or an attribute, the URL preprocessor 314 may further perform a process of performing a pre-request for a subsequent image request. That is, by parsing a web document (HTML) to extract the web information (URL) of the image (621) by checking whether the web information (URL) of the image exists in the next process (623) by the web server 340 in advance to the image data (625). By doing so, when the terminal 350 requests the image data, the terminal 350 converts the image data that is loaded in advance and transmits the image data.

In addition, the controller 313 may periodically or by means of fetch logic that has the highest web protocol (HTTP) request via the HTML preprocessor 315 to minimize web information requests to the web server 340. The cache may be performed regardless of the client's web protocol (http) request.

7 is a flowchart illustrating an embodiment of a content converter according to the present invention.

First, the content conversion unit 320 analyzes the content type and determines the data type from the raw data (619). If the image (JPG / GIF) is checked, the user option is checked (701). Check (703). The check result (703), if not processed returns (705), if processed receives all the file content in the buffer (707) converts the image (709) and transmits to the communication socket (711).

On the other hand, if the determination result 619, a web document tag or an attribute, the user option is checked (701) to confirm whether the processing (713). The check result 713, if not processed, returns (715), and if processed, receives the packet currently available in the buffer (717), converts the web document (HTML) (719), and transmits it to the communication socket (721). Then, it checks whether it is the end of the character stream (723) or otherwise repeats the process of receiving the currently available packet in the buffer (717), and returns if it is the end.

On the other hand, the determination result (619), if the text is checked by the user option (701) to determine whether the process (725). The check result (725), if not processed returns (727), and if processed receives all the file contents in the buffer (729), compresses the text (731) and transmits to the communication socket (733).

On the other hand, if the determination result 619, image, web document, and other content other than text is returned without processing (727).

As described above, the gateway device, the wireless data service system, and the method of the wireless data network according to the present invention may be replaced by similar methods of various forms. In addition, the client processor of the terminal may be modified in various forms to perform its functions or various modifications to control compression / restore. In particular, the present invention is a mobile communication terminal, a personal mobile communication terminal, a wireless call terminal, a personal data communication terminal (PDA), a smart phone (Smart Phone), etc. Applicable to the terminal form.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention is applicable not only to wireless communication networks such as wireless data networks, mobile communication networks, and personal mobile communication networks, which are limited in transmission speed, but also to general wired communication networks (LAN, WAN, ISDN), and images and web documents. By reducing the amount of data transferred by the conversion and compression / restore function of the text, the transfer speed can be improved.

In addition, the present invention, by performing the prefetch (Prefetch) function and the pre-request (Prerequest) function, there is an effect that can improve the response speed to shorten the transmission time.

In addition, the present invention, not only wired terminal such as a desktop computer, but also all wired / wireless terminals having a web browsing function such as a mobile communication terminal, a personal mobile communication terminal, a personal data communication terminal (PDA), a smart phone, and the like. It can be applied, which makes it possible to use the Internet service faster and has the advantage of viewing existing web documents.

In addition, the present invention has the effect that the user can set the proxy setting of the level desired by the user, so that the Internet can be used more conveniently.

Claims (37)

delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete A gateway device connected between a network matching device for interworking with a wireless communication network and a web server to provide a wireless data service, Content conversion means for parsing a web document to process conversion for the web document, converting an image constituting the web document, and compressing text in the web document; Cache management means for storing a web document having a high possibility of re-request in advance and managing the stored web document; And In response to a web document request from a terminal, the web document requested by the cache managing means or the web server is transferred to the content converting means to convert / compress the web document, and the converted / compressed web document is stored in the web document. If the web document is transmitted to the terminal, and the web document received from the web server is parsed and the image is included in the web document, the image data is requested to the web server in advance, received, stored in the cache management means, and the image from the terminal. And a server control means for converting the pre-stored image through the content conversion means and forwarding the image to the terminal upon request. The method of claim 20, The cache management means, Cache control means for processing and managing cache data through a hash table; And And said cache database for storing cache data under the control of said cache control means. delete The method of claim 20 or 21, The server control means, Communication means for transmitting and receiving data with the terminal and the web server through an access port; Web information (URL) preprocessing means for parsing a web document transmitted from the web server and requesting image data from the web server in advance and storing it in the cache management means if an image is included in the web document; Web document (HTML) preprocessing means for requesting the web server in advance for a web document having a high possibility of re-requesting from the web document and storing it in the cache managing means; And And a control means for controlling the operation of said communication means, said web information (URL) preprocessing means and said web document (HTML) preprocessing means, and controlling the flow of data. . The method of claim 23, wherein The content conversion means, Web document (HTML) conversion processing means for processing conversion of tags and properties of the web document; Text compression means for compressing text characters in a web document; And And image conversion processing means for converting an image attribute to a compressed image constituting a web document to reduce a file size. delete The method of claim 23, wherein The control means, And converting / compressing the web document and transmitting the original text web document through the content converting means according to the user option information transmitted when the web document is requested from the terminal. A wireless data service processing method in a gateway device connected between a network matching device for interworking with a wireless communication network and a web server to provide a wireless data service, the method comprising: A first step of, when the gateway device receives a request for web information (url) from a terminal, checking whether the information is valid by comparing the received information to the web server and cache information previously stored in a cache database; In the first step, if the cache information is valid, a second step of converting / compressing a web document stored in the cache database to the terminal; A third step of requesting and receiving a web document from the web server if the cache information is invalid in the first step; The gateway device compresses the web document received from the web server and transmits it to the terminal, parses the web document received from the web server, and requests image data from the web server in advance if an image is included in the web document. Receiving the received data and storing it in the cache database; And In response to the image data request from the terminal, the gateway device comprises a fifth step of reading the image data pre-stored in the cache database, and converts the read image data to the terminal; Wireless data service processing method. The method of claim 27, In the second step, the step of converting / compressing the web document to the terminal, Reading and parsing the header of the received web document to analyze a user option and a setting mode, and analyzing a content type; If the content type is an HTML tag or an attribute, converting the web document and transmitting it through a communication socket; Compressing the text and transmitting it through the communication socket if the content type is text; And If the content type is an image, converting the image and transmitting the same through a communication socket. The method of claim 28, The converting and transmitting the image may include transmitting the reduced image file size. delete delete delete delete In a gateway server connected between a network matching device for interworking with a wireless communication network and a web server to provide a wireless data service, Receiving a web information (url) request from the terminal, the first step of checking whether the information is valid by comparing the received information with the cache information previously stored in the cache database; In the first step, if the cache information is valid, a second step of converting / compressing a web document stored in the cache database to the terminal; A third step of requesting and receiving a web document from the web server if the cache information is invalid in the first step; Compress the web document received from the web server and transmit it to the terminal. If the web document received from the web server is parsed and the image is included in the web document, request the image data from the web server in advance to receive the image. Storing in a cache database; And If there is an image data request from the terminal, the gateway device reads the image data pre-stored in the cache database, and reads the program for executing the fifth step of converting the read image data and transmitting it to the terminal. Recordable media. delete delete delete

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