KR100692101B1 - System and method of providing file service for transmitting files remotely - Google Patents

Abstract

A file service system for sending remote files and a service method therefor are provided to effectively display various application formats of files used in a computer environment, on a remote mobile terminal irrespective of the type, performance and environment of the mobile terminal, thereby displaying optimized images on a screen of a mobile terminal. A mobile terminal(3) demands a file service after accessing a file transmission server(2), displays executed results of the file service on a screen, and properly renders a received file according to the screen of the terminal(3) to display the rendered file. The file transmission server(2) interprets the file service demand received from the terminal(3) to download an original file from a contents server(4), and converts the downloaded file into a single format of vector-based image file through a file conversion server(1), then delivers the converted file to the terminal(3).

Description

System and method of providing file service for transmitting files remotely}

1 is an embodiment of a file service system configuration for transmitting a remote file according to the present invention;

2 is an embodiment of a file conversion server configuration according to the present invention;

3 is a reference diagram for explaining an operation of a file conversion server according to the present invention;

Figure 4 is an embodiment of a file transfer server configuration according to the present invention,

5 is an embodiment of a mobile terminal configuration according to the present invention;

6 is a diagram illustrating a file service method according to the present invention;

7 is another embodiment of a file service system configuration for transmitting a remote file according to the present invention;

8A and 8B illustrate one embodiment of various search and file viewer functions provided in a mobile terminal in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

1: file conversion server 2: file transfer server

3: mobile terminal 4: content server

5: service server

10: conversion request receiving module 12: file conversion module

14: conversion result transmission module 30: browser module

32: File Viewer Module

The present invention relates to remote file transfer, and more particularly, to a file service system and a service method for efficiently transmitting and displaying files of various application formats stored at a remote location to a mobile terminal.

Recently, as mobile terminals such as mobile phones, CDMA terminals, PDAs, and the like become more common, a function of freely searching, transmitting, viewing, and printing various types of files through wired / wireless networks is required.

However, in the related art, in order to download and read files of various application formats used in a general computer to a user's mobile terminal, separate viewer programs provided by various applications that have created each file must be separately installed on the mobile terminal. There was discomfort. For example, in order to view the original files in various formats such as doc, hwp, ppt, pdf, and html according to various application types, the viewer programs of each application had to be loaded.

In addition, since the resources of the mobile terminal are limited, it is difficult to process a large amount of files, and there is a problem that it is difficult to use the file format used in the computer as it is without distortion.

Accordingly, an object of the present invention for solving the above problems is a file service system that can effectively transmit and display files of various application formats used in a computer environment to a remote mobile terminal regardless of the type, performance and environment of the mobile terminal. And a service method thereof.

According to an aspect of the present invention, the above object is, in a file service system for transmitting a remote file via a wired / wireless network, accesses a server to request a file service and display a result of performing the file service on a screen; A terminal for rendering and displaying the received file appropriately on a screen of the terminal; And a server which analyzes the file service request received from the terminal, downloads a corresponding original file, converts the downloaded original file into a vector-based image file in a single format, and transmits the original file to the terminal. It is achieved by a file service system comprising a.

Here, it is preferable that the server converts the downloaded source files of various formats into a vector-based image file of a single format including vector-based rendering information by using a converting driver. Using a vector-based rendering information included in the image file, it is preferable to mount a dedicated viewer program for rendering and displaying according to the screen size of the terminal.

In addition, the vector-based image file preferably includes vector-based rendering information that can be freely enlarged or reduced in size regardless of the type of the terminal. Particularly, the vector-based image file has an EMF (Enhanced window MetaFile) file format. It is preferable to create a temporary file of the file, and furthermore, in order to improve transmission and access efficiency, it is particularly preferable that the vector-based image file is divided into pages.

Furthermore, the server can compress the vector-based image file and transmit it to the terminal in order to increase the transmission efficiency.The server function for downloading and transmitting the file and the server function for converting the file are configured as separate servers or integrated as one. It is desirable to be able to configure it as a service server. The dedicated viewer program mounted on the terminal is preferably ported to the terminal or downloadable from a server.

On the other hand, according to another aspect of the present invention, the above object is a file service method for transmitting a remote file via a wired or wireless network, comprising: receiving a file service request from a terminal; Analyzing the file service request received from the terminal and downloading a corresponding original file; Converting the downloaded source files of various formats into vector-based image files of a single format; And transmitting the converted vector-based image file to the terminal.

In this case, it is preferable that the terminal further comprises the step of rendering and displaying the received vector-based image file on the screen of the terminal.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention; In the following description of the present invention, if it is determined that detailed descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.

1 is an embodiment of a configuration of a file service system for transmitting a remote file through a wired or wireless network according to the present invention.

Referring to FIG. 1, a file service system 100 according to the present invention includes a mobile terminal 3, a file transfer server 2, and a file conversion server 1. In addition, the file service system according to the present invention can access the content server 4 via a wired or wireless network.

The mobile terminal 3 connects to the file transfer server 2 to request a file service, displays a result of performing the file service on the screen, and renders and displays the received file according to the screen of the mobile terminal. In this case, the mobile terminal 3 is preferably equipped with a dedicated file viewer program that renders and displays the image according to the screen size of the terminal using the vector-based rendering information included in the received single format vector-based image file. . The dedicated viewer program mounted on the mobile terminal is preferably ported to the mobile terminal and released or later downloadable from the file transfer server 2 or the file conversion server 1 to the mobile terminal. Mobile terminals include mobile communication terminals such as mobile phones, CDMA terminals, PDAs, and the like, which support the wireless Internet.

The file transfer server 2 interprets the file service request received from the mobile terminal 3, downloads the corresponding original file from the content server 4, and downloads the vector-based image file in a single format through the file conversion server 1. After the conversion to the mobile terminal (3). At this time, the file transfer server 2 may compress and transmit the vector-based image file to the mobile terminal 3 in order to increase the transmission efficiency.

Meanwhile, the file conversion server 1 converts the original files of various application formats received from the file transfer server 2 into vector-based image files of a single format and then returns to the file transfer server 2. To pass. More specifically, upon receiving a file conversion command, the file conversion server 1 converts the downloaded original file of various application formats into a single format vector-based image file including vector-based rendering information using a converting driver. .

Here, the vector-based image file preferably includes vector-based rendering information that can be freely scaled up or down regardless of the type of mobile terminal. As a representative embodiment, the vector-based image file is preferably generated using a temporary file in the Enhanced Window MetaFile (EMF) file format. In particular, it is preferable that the vector-based image file is divided and managed in units of pages to effectively process a large file in a mobile terminal with limited resources. A more specific method of converting a file will be described later.

The operation of the file service system 100 according to the present invention will be described as follows.

First, the mobile terminal 3 connects to the file transfer server 2 via a swap browser, and uses a search function provided by the file transfer server 2 to remotely the content server 4 or another web server (not shown). Display files in various application formats stored on a remote computer (not shown). If the user selects a file to be viewed from the displayed list, the file transfer server 2 requests the transfer of the file (S100). In this case, URL (Universal Resource Location) information indicating the location of the requested file is transmitted to the file transfer server 2.

The file transfer server 2 that has received the file transfer request requests the original file of the file from the accessed content server 4 by accessing the received URL (S101), and retrieves the original file of the file from the content server 4. Download (S102). At this time, the original file can be downloaded from various web servers (not shown) or various remote computers (not shown) instead of the content server 4. In addition, instead of the file transfer server 2, a separate storage server (not shown) such as a web disk may play a role of downloading the original file of the file from the requested URL. The file transfer server 2 now transfers the original file data to the file conversion server 1 and makes a file conversion request (S103).

The file conversion server 1 converts the received original file data of various formats into a vector format image file of a single format, and then transfers the converted file combining the additional information to the file transfer server 2 (S104) (S105). ). The file transfer server 2 stores the converted file and returns a unique ID (file UID) in which the file is stored. At this time, if the converted file is stored in the cache area of the file transfer server 2, it can be accessed more quickly and efficiently. As another application example of the present invention, access speed can be increased by storing the converted file in a cache area of a web disk server (not shown) separate from the file transfer server 2.

The mobile terminal 3 receives the user's file viewing request through the WAP browser, drives the file viewer program described below, and requests the file transfer server 2 to download the corresponding file ID (file UID) to download the corresponding converted file. In operation S106, the vector-based image file is properly rendered on the mobile screen by using the vector-based rendering information included in the conversion file through a dedicated file viewer program mounted on the mobile terminal and displayed on the screen (S107).

More specifically, FIG. 2 illustrates an embodiment of a file conversion server 1 constituting the file service system 100 according to the present invention.

Referring to FIG. 2, the file conversion server 1 includes a conversion request receiving module 10, a file conversion module 12, and a conversion result transmission module 14. When the conversion request receiving module 10 receives a file conversion request from the file transfer server 2, the conversion request receiving module 10 temporarily stores the original file and distributes the request to a queue to execute the file conversion module 12. The file conversion module 12 temporarily generates a vector-based image file (for example, an EMF format file) by using a converting driver 1202 such as a virtual print driver to convert an original file of various application formats into a mobile device. The converter 1200 creates a conversion file by adding vector-based rendering information so that it is appropriate to be displayed on the screen, and separately manages page information divided and divided into pages as one list information to improve the transmission efficiency of the conversion file. A page separator 1204 and a combiner 1206 for packing meta information including list information and other rendering information into divided page-level conversion file data. The combined conversion file is transmitted to the mobile terminal 3 via the mobile file transfer server 2 through the conversion result transmission module 14.

Looking at a more specific embodiment, the protocol for the file conversion request includes a user ID for identifying a user, the number of attachments, a file ID for identifying each attachment, the name of the attachment, the binary of each attachment Parameters such as file data indicating data contents may be included. The file conversion request may return a processing result for a file conversion request such as OK, network error, server busy, unknown error, or the like.

On the other hand, the file conversion module 12 generates converted file data (* .mfv) divided by pages and converted file list information (* .mfi). Particularly, the converted file list information includes the original file name, the number of attached files, Information such as the total number of pages and a list of names of each converted file may be included.

Further, the conversion result transmission module 14 transmits the conversion file generated by combining meta information including list information and other rendering information to the file transfer server 2 and converts the converted file data into a database storage unit or a separate storage server. Save it. At this time, the combined conversion file may include a user ID, the number of attachments, an identifier for identifying each attachment, the binary data contents of the MFV file, the binary data contents of each EMF file, and the like.

3 is a reference diagram for explaining the operation of the file conversion server 1 according to the present invention in more detail.

Referring to FIG. 3, the file conversion module 12 converts original files of various application formats such as Word, Korean, PowerPoint, Excel, PDF, etc. using the converting driver 1202 to generate a vector-based image file (*. emf) In addition, the converter 1200 generates a conversion file divided into page units to include a vector-based rendering information so as to optimally display the temporary file (* .emf) on the screen of the mobile terminal and to increase the transmission efficiency ( * .mfv). The page separator 1204 generates list information (* .mfi) of page-specific converted files. Now, through the combiner 1206, the page-specific conversion files (* .mfv), the conversion file list information (mfi), and other meta information are combined and compressed together, and the result is transmitted to the file transfer server 2.

Here, the original file is a file of various application formats before conversion through the converter 1200, the conversion file is a vector-based image file (converted by page), which is converted by the converter 1200 and includes vector-based rendering information. mfv format), pages are units that can be displayed on one screen upon output (eg, A4 size), and EMF (Enhanced window MetaFile) is converted to primary using the converting driver 1202 of the converter 1200. A vector-based temporary image temporary file (* .emf), MFV converts page-specific conversion data converted by the converter, and MFI converts list information including file name and file format information of the converted file. The information means information on the converted file, such as a file name, file size, file format, file title, etc. of the converted file.

In the above, the source files of various application formats are converted into a vector-based image file by using a converting driver, and the vector-based image file includes a vector-based rendering information optimized for a mobile screen and generates a conversion file divided into pages. An embodiment of transmitting to the file transfer server 2 together with other additional information has been described.

However, the file conversion method according to the present invention is not limited to the file conversion method divided into pages as described above. That is, various types of file conversion methods including a concept of converting original files of various formats into vector images of a single format using a converting driver may be included. Accordingly, the configuration of the file conversion module 12 is not limited to the illustrated embodiment, and various modifications are possible. That is, each module may be implemented by one program or hardware, and may not include a function of dividing the converted vector-based image file into pages. In addition, when the size of the converted vector-based image file is too large, the converted file may be generated by adjusting the size of the vector-based image file to an appropriate size so as to increase the transmission efficiency according to the performance of the terminal to be transmitted.

On the other hand, Figure 4 shows an embodiment of the configuration of the file transfer server 2 constituting the file service system 100 according to the present invention.

Referring to FIG. 4, the file transfer server 2 includes a file storage unit 20, a file upload unit 22, and a file list upload unit 24, and may include a database storage unit or a separate storage server ( Not shown). The file transfer server 2 not only performs original file management such as uploading, downloading, and storing the original file, but also stores files converted by the file conversion server 1 in units of pages and responds to a request of the file viewer. To transfer the converted files in units of pages.

In particular, the file transfer server 2 may compress and transmit or receive a file as needed, and may support a compression function so that the file may be compressed according to a system management policy for long term file storage. Compression of files includes the ability to compress multiple files into a single file.

The files included in the file transfer server 2 or stored in a database storage configured as a separate storage server preferably include attribute information as shown in Table 1 below.

field Explanation Service Vendor SKT / LG Electronics Type of service Email / Web Disk… folder Folder name to be saved in the workspace of the specified service vendor / type (created if there is no folder) owner Owner of the file Filename The name of the file Page When stored for each page, the page field value is 1..N. size File size Kinds Type of file (DOC / PDF / XLS etc.) Creation date Original creation date of the file Saved date File save date Expiration date File expiration date (removed when the expiration date) Uploader Who uploaded the file Protection Whether it will be protected by a password password Password for protection authority Permission to access files (RWRWRW) Note Other information Compression

The file transfer server 2 performs management functions such as uploading, downloading, and storing a file by using the attributes of the above-described file. For example, in order to upload a file from the file transfer server 2, a file upload request including a file name, a page, a service vendor, a service type, an owner, and a file type (FileType) among the above-described file attributes. Is transmitted to the file transfer server 2 and the file ID (file UID) is returned as a result. In addition, it may further include information such as creation date, storage expiration date, compression. When several pages are compressed into one file, they may be decompressed on the file transfer server side. In order to download a file to the file transfer server 2, a service vendor, a service type, and a file ID (file UID) are transmitted. When obtaining a file list (Get File list), the service provider, service type, owner, page information and the like are transmitted to the file transfer server 2. When obtaining information on the type of file (Get File Property), the service provider, service type, owner, and file ID (file UID) are transmitted to the file transfer server 2. To delete a file, pass the service vendor, service type, owner, and file ID (file UID).

Accordingly, the mobile terminal 3 may provide various search functions for files stored remotely and various management functions such as upload and download.

8A and 8B illustrate one embodiment of various search and file viewer functions provided in a mobile terminal in accordance with the present invention.

Referring to FIG. 8A, when a remote file service "My File Search" service is selected through a search page provided by a swap server called "nate.com", for example, the My File Search page is displayed on the screen of the mobile terminal 3. It is displayed on, and you can use various search functions such as search through search word, file search search, or email search search service. As shown in FIG. 8B, when a file reading request is requested for the searched file, a vector-based image file of a type optimized for the mobile terminal 3 is displayed through the file changing process as described above.

5 shows an embodiment of the configuration of the mobile terminal 3 constituting the file service system 100 according to the present invention.

Referring to FIG. 5, the mobile terminal 3 includes a swap browser module 30 that provides an interface for connecting to a server through a wireless network, and vector-based rendering information and embedded in a converted file received from the server. And a file viewer module 32 that renders the converted vector-based image file using the font information or the graphic information to be displayed on the screen of the mobile terminal. In particular, the file viewer module 32 is preferably ported to the mobile terminal 3 and released or downloaded from the file transfer server 2 or the file conversion server 1 in the form of a virtual machine.

As shown in FIG. 5, the mobile terminal may include a WAP browser module 30, a file viewer module 32, a transmission / reception module 34, an image processing module 38, and a local file access module 36. have. Each module may be implemented in the form of a separate program or hardware, or may be implemented in the form of one program or hardware incorporating each function.

Specifically, the swap browser module 30 may access the file transfer server 2 to search for various files stored at a remote location, and receive and process a file reading request from a user. The file viewer module 32 downloads the conversion file for each page from the file transmission server 2 through the transmission / reception module 34 and receives vector-based rendering information included in the conversion file, font information embedded in the mobile terminal 3, and the like. The 2D or 3D graphic information is used to render the image according to the size of the mobile screen through the image processing module 38 and displayed on the screen. In this case, the size of the vector-based image can be freely adjusted and displayed on the screen according to the size of the mobile screen using the vector-based rendering information included in the transform file.

Accordingly, the file may be displayed in the form of a vector image optimized for the mobile screen size regardless of the type, performance, and environment of the mobile terminal. In addition, by reading the file converted appropriately for the mobile screen from the file transfer server 2 in units of pages and outputting it to the screen, even a normal file used in a computer environment is displayed on the screen in an optimal format without distortion on the mobile terminal 3. can do. Furthermore, by managing the conversion file in units of pages, a file viewer service function may be provided so that even a mobile terminal having limited resources can efficiently view a large amount of original files.

On the other hand, files stored in the local storage unit 40 of the mobile terminal do not need a conversion process, so that the image is immediately rendered through the image processing module 38 without going through the viewer module 32 is displayed on the screen.

Meanwhile, the file service method according to the present invention is illustrated based on the configuration of the file service system 100 described above.

Referring to FIG. 6, in order to support reading of a general file used in a computer environment in a mobile terminal, first, the mobile terminal 3 accesses a file transfer server 2 through a wired / wireless network to perform a file request. Request a file reading request by passing the URL for the file (S100), interpret the file reading request received from the file transfer server, download the original file from the corresponding URL (S101 and S102), and convert the file to the file conversion server 1 Request (S103). The file conversion server 1 converts original files of various formats into vector-based image files of a single format (S104), and transmits the converted files to a file transfer server and stores them (S105). The mobile terminal 3 downloads the converted file (S106) and renders the converted file appropriately on the screen of the mobile terminal using the vector-based rendering information included in the converted file through a dedicated file viewer module 32. (S107).

At this time, the step of converting the file (S104) converts the original file of various application formats into a temporary file (* .emf) including the rendering information using the converting driver 1202 and then converts the temporary file into a vector-based rendering. It is preferable to convert the image-based image file into a single format including information. In particular, in order to efficiently process a large file in a resource-limited mobile terminal, it is preferable to manage the divided file in units of pages. Further, for faster access, it is particularly preferable to store the converted file in the storage area of the file transfer server 2 in units of pages and transmit it to the mobile terminal in units of pages.

In the step S107 of displaying the file on the mobile screen, the converted file received from the file transfer server 2 is rendered using font information or 2D or 3D graphic information stored in the mobile terminal and displayed accordingly on the screen of the mobile terminal. It is desirable to. In this case, the size of the vector-based image can be freely adjusted and displayed on the screen according to the size of the mobile screen using the vector-based rendering information included in the transform file.

Meanwhile, according to another aspect of the present invention, the file service system 100 may configure the above-described file transfer server 2 and the file conversion server 1 as one server. 7 illustrates another embodiment of a configuration of a file service system for transferring a file at a remote location according to the present invention. The system may be configured such that the service server 5 performs the functions of the file transfer server 2 and the file conversion server 1 described above with reference to FIG. 7.

As described above, according to the present invention, there is provided a file service system and a service method which can effectively display files of various application formats used in a computer environment on a remote mobile terminal regardless of the type, performance, and environment of the mobile terminal. .

That is, the server converts the downloaded source files of various formats into a vector-based image file of a single format including vector-based rendering information by using a converting driver and transmits them to the mobile terminal. Optimized to fit the mobile screen size regardless of the type, performance and environment of the mobile terminal by loading a dedicated viewer program that renders and displays the screen size of the terminal using the vector-based rendering information included in the base image file. The file can be displayed in the form of a vector image.

In particular, the vector-based image file includes vector-based rendering information that can be freely enlarged or reduced in size regardless of the type of the terminal, thereby displaying an optimized image regardless of the size or type of the mobile screen.

In addition, since the vector-based image file is divided into pages and managed, even a mobile terminal having limited resources can efficiently access a large amount of original files.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

Claims (19)

In a file service system that transmits a remote file through a wired or wireless network, A terminal for requesting a file service by accessing a server and displaying a result of performing the file service on a screen, or rendering and displaying a received file appropriately on a screen of the terminal; And Interpreting the file service request received from the terminal to download the corresponding original file, converting the downloaded original file into a vector-based image file of a single format and transmitting the same to the terminal; File service system comprising a server. The method of claim 1, The server converts the downloaded original file of various formats into a single format vector based image file including vector based rendering information using a converting driver. The method of claim 1, The terminal is equipped with a file viewer system that is equipped with a dedicated viewer program for rendering according to the screen size of the terminal using the vector-based rendering information contained in the received vector-based image file of the single format; . The method according to any one of claims 1 to 3, The vector-based image file is a file service system, characterized in that it comprises a vector-based rendering information that can be freely enlarged or reduced in size regardless of the type of the terminal. According to claim 4, The vector-based image file is a file service system, characterized in that it is generated using a temporary file of the Enhanced Window MetaFile (EMF) file format. The method of claim 4, wherein And the vector-based image file is divided into pages and managed. The method of claim 1, The server compresses the vector image file and transmits the file service system to the terminal. The method of claim 1, The server may be configured to separately configure the server for downloading and transmitting the file and the server for converting the file. The method of claim 1, The dedicated viewer program mounted on the terminal is a file service system, characterized in that being ported to the terminal or downloadable from the server. In the file service method for transferring a remote file via a wired or wireless network, Receiving a file service request from a terminal; Analyzing a file service request received from the terminal and downloading a corresponding original file; Converting the downloaded source files of various formats into vector-based image files of a single format; And And transmitting the converted vector-based image file to the terminal. The method of claim 10, And rendering, by the terminal, the received vector-based image file to be displayed on the screen of the terminal to be displayed. The method according to claim 10 or 11, wherein In the converting, the server converts the downloaded source file of the various formats into a single format vector based image file including vector based rendering information using a converting driver. The method according to claim 10 or 11, wherein The terminal uses a vector-based rendering information included in the received vector-based image file of the single format file service method, characterized in that to mount a dedicated viewer program for rendering and display according to the screen size of the terminal. The method according to claim 10 or 11, wherein The vector-based image file file service method comprising a vector-based rendering information that can be freely enlarged or reduced in size regardless of the type of the terminal. The method according to claim 10 or 11, wherein The vector-based image file is a file service method, characterized in that generated using a temporary file of the Enhanced window MetaFile (EMF) file format. The method according to claim 10 or 11, wherein The vector-based image file is a file service method, characterized in that divided into pages. The method according to claim 10 or 11, wherein In the transmitting, the server compresses and transmits the vector-based image file to the terminal. The method according to claim 10 or 11, wherein The server may be configured to separately configure a server for downloading and transmitting the file and the server for converting the file. The method according to claim 10 or 11, wherein The dedicated viewer program mounted on the terminal is ported to the terminal or downloaded from the server.

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