KR100718047B1 - Pc-to-mobile system, computer terminal, server, mobile phone and mobile terminal - Google Patents

Abstract

The present invention relates to a P2M (Pc-to-Mobile) system and a computer terminal, a server, a mobile phone and a mobile terminal for the same. The P2M system is a system for enabling a connection service between a personal computer and a mobile device and a multimedia providing service.

P2M system of the present invention has a unique telephone number, a mobile terminal capable of Internet access; At least one computer terminal for transmitting a dynamic IP and a registered telephone number; And store the dynamic IP from the computer terminal and the registered telephone number so as to correspond to each other, and when the mobile terminal accesses, retrieve the registered telephone number corresponding to the unique telephone number, and correspond to the retrieved registered telephone number. And a server for transmitting the floating IP to the mobile terminal to connect the mobile terminal to the computer terminal based on the received floating IP. Thereby, it is possible to connect to the computer terminal having the floating IP without having the domain name from the mobile phone 30 and the mobile terminal 60, and to download and stream the multimedia content from the connected computer terminal.

Pc-to-mobile

Description

P2M system and computer terminal, server, mobile phone and mobile terminal for it {Pc-to-Mobile system, computer terminal, server, mobile phone and mobile terminal}

1 is a block diagram of a P2M system according to an embodiment of the present invention;

2 is a schematic block diagram of a computer terminal according to an embodiment of the present invention;

3 is a schematic block diagram of a server according to an embodiment of the present invention;

4 is a schematic block diagram of a mobile phone according to an embodiment of the present invention;

FIG. 5 is a flowchart illustrating an example of a method of operating the P2M system disclosed in FIG. 1.

The present invention relates to a P2M (Pc-to-Mobile) system and a computer terminal, a server, a mobile phone and a mobile terminal for the same. The P2M system is a system for enabling a connection service between a personal computer and a mobile device and a multimedia providing service.

Recently, the number of users using the Internet through mobile phones and mobile terminals is increasing rapidly, but the content available through the Internet is limited due to the limited number of content providers (CPs).

The mobile phone user may access content provided by a server provided by a mobile communication provider, or use content by accessing a server directly provided by a content provider. As a method of accessing a server of a content provider other than a mobile communication provider, there is a method of accessing a server by selecting a domain name of the server through a mobile phone or transmitting a number corresponding to the domain name (WINC service).

That is, the server providing the content has a fixed IP or at least a domain name, so that the mobile phone user connects to the server using the domain name or the fixed IP.

On the other hand, most personal computers have dynamic IP and do not have a domain name, so mobile phone users are not easy to access their own computers. Therefore, mobile phone users cannot use the high quality multimedia contents stored in their personal computers, and there is an unreasonable aspect of being forced to use the paid service provided by the content provider.

In addition, although the format and protocol of a multimedia file that can be played on a mobile terminal such as a mobile phone are standardized, tools for providing a suitable conversion are not provided. Even when a personal computer having a floating IP is connected from a mobile phone, there is a problem that multimedia contents cannot be streamed easily from the personal computer.

Accordingly, an object of the present invention is to provide a P2M system and a computer terminal, a mobile phone, a server, and a mobile terminal used for receiving multimedia content playable on a mobile terminal from a personal computer having no domain name and having a floating IP. .

The present invention relates to a P2M (Pc-to-Mobile) system for achieving the above object, a mobile terminal having a unique telephone number and Internet access; At least one computer terminal for transmitting a dynamic IP and a registered telephone number; And store the dynamic IP from the computer terminal and the registered telephone number so as to correspond to each other, and when the mobile terminal accesses, retrieve the registered telephone number corresponding to the unique telephone number, and correspond to the retrieved registered telephone number. And a server for transmitting the floating IP to the mobile terminal to connect the mobile terminal to the computer terminal based on the received floating IP.

When the mobile terminal is connected, the computer terminal may transmit a page about the list of multimedia files to the mobile terminal, wherein the mobile terminal selects at least one of the list of the multimedia files and transmits the same to the computer terminal. The computer terminal may be configured to download the multimedia file received from the mobile terminal to the mobile terminal. The computer terminal may convert the multimedia file selected by the user into a predetermined standard format that can be played on the mobile terminal, and store the converted multimedia file, and update the page to include information on the converted multimedia file. have. In addition, the computer terminal includes a RAM for storing the page, and when the mobile terminal is connected, by transferring the page from the RAM to the mobile terminal, it is possible to significantly reduce the data transfer amount and the process amount. In addition, the computer terminal may include a script for causing the page to run on the mobile terminal, and when the floating IP is updated to send the updated floating IP and the registered telephone number to the server can do.

In addition, according to another aspect of the present invention, a P2M system of the present invention comprises a mobile terminal for receiving and transmitting a search phone number from the user; At least one computer terminal for transmitting a dynamic IP and a registered telephone number; And store the dynamic IP from the computer terminal and the registered telephone number so as to correspond to each other, and when the search telephone number is received from the mobile terminal, search for the registered telephone number corresponding to the search telephone number, And a server for transmitting the floating IP corresponding to a registered telephone number to the mobile terminal so that the mobile terminal connects to the computer terminal based on the received floating IP.

The present invention also relates to a computer terminal having a floating IP, comprising: a storage medium for storing at least one multimedia file; An input unit to receive selection information on the multimedia file from a user; A network connection that can be connected to the mobile phone through the Internet; And selecting the multimedia file from the storage medium according to the selection information from the input unit, converting the selected multimedia file into a predetermined standard format that can be played on the mobile phone, and storing the multimedia file in the storage medium. And a multimedia platform for downloading the multimedia file in a standard format to the mobile phone when the multimedia file is requested to be downloaded from the mobile phone. Wherein the storage medium stores a predetermined registered telephone number; The network connection unit is connectable to a server for transmitting the floating IP to the mobile phone via the registered telephone number; The multimedia platform may be configured to transmit the floating IP and the registered telephone number to the server through the network connection unit when the floating IP is updated. The storage medium may also store predetermined user authentication information; The network connection unit is connectable to a server for transmitting the floating IP to the mobile phone via the user authentication information; The multimedia platform may be configured to transmit the floating IP and the user authentication information to the server through the network connection unit when the floating IP is updated. The multimedia platform may allow a page for the list of multimedia files to be driven in the mobile phone when the mobile phone is connected to the network connection unit based on the floating IP. In the case of converting and storing the data into a format that can be reproduced in the mobile phone, the page of the list of the multimedia files may be updated. The multimedia platform may allow the player for the multimedia file to be driven in the mobile phone when there is a streaming request of the multimedia file from the mobile phone through the network connection unit. The computer terminal of the present invention further includes a RAM; The multimedia platform reads the page for the list of multimedia files from the storage medium and initializes the page, and transmits the page stored in the RAM to the mobile phone when the mobile phone accesses the network connection. can do.

The present invention also relates to a server, comprising: a storage medium; A communication module connectable to at least one computer terminal and a mobile phone via the Internet; A data management unit which receives the floating IP and the predetermined registered telephone number of the computer terminal from the computer terminal through the communication module and stores the floating IP and the registered telephone number in the storage medium so as to correspond to each other; And receiving the unique phone number of the mobile phone from the mobile phone through the communication module, searching for the registered phone number corresponding to the unique phone number, and transmitting the floating IP corresponding to the retrieved registered phone number through the communication module. It characterized in that it comprises an IP search unit for transmitting to the mobile phone.

In addition, according to another aspect of the invention, the server of the present invention comprises a storage medium; A communication module connectable to at least one computer terminal and a mobile terminal via the Internet; A data management unit which receives the floating IP and the predetermined registered telephone number of the computer terminal from the computer terminal through the communication module and stores the floating IP and the registered telephone number in the storage medium so as to correspond to each other; And receiving a predetermined search telephone number from the mobile terminal through the communication module, searching for the registered telephone number corresponding to the search telephone number, and converting the floating IP corresponding to the searched telephone number through the communication module. It characterized in that it comprises an IP search unit for transmitting to the mobile terminal.

The present invention also relates to a mobile phone having a unique telephone number, comprising: a communication module connectable to a server for storing a floating IP corresponding to the unique telephone number; A connection controller which transmits the unique telephone number to the server, receives the floating IP corresponding to the unique telephone number from the server, and connects to the computer terminal of the received floating IP; And a multimedia platform for downloading multimedia files from the connected computer terminal.

The present invention also relates to a mobile terminal, comprising: an input unit for receiving a predetermined search telephone number from a user; A communication module connectable to a server storing a floating IP corresponding to the search telephone number; A connection control unit which transmits the search telephone number to the server, receives the floating IP corresponding to the unique telephone number from the server, and connects to the computer terminal of the received floating IP; And a multimedia platform for downloading multimedia files from the connected computer terminal.

In addition, according to another aspect of the present invention, a P2M system of the present invention has a predetermined user authentication information, a mobile terminal capable of Internet access; At least one computer terminal for transmitting the registered user authentication information and floating IP; And store the dynamic IP and the user authentication information from the computer terminal so as to correspond to each other, receive the user authentication information from the mobile terminal, search for a match among the stored user authentication information, and retrieve the retrieved user authentication information. And a server for transmitting the floating IP corresponding to the mobile terminal to connect to the computer terminal based on the received floating IP. Here, the computer terminal may have a multimedia file in a format that can be played in the mobile terminal, and the multimedia file may be downloaded to the mobile terminal according to request information from the connected mobile terminal.

In addition, according to another aspect of the invention, the server of the present invention comprises a storage medium; A communication module connectable to at least one computer terminal and a mobile phone via the Internet; A data management unit which receives the floating IP and predetermined user authentication information of the computer terminal from the computer terminal through the communication module and stores the floating IP and the user authentication information in the storage medium so as to correspond to each other; And receiving the user authentication information from the mobile phone through the communication module, searching for a match with the received user authentication information among the user authentication information stored in the storage medium, and the flow corresponding to the retrieved user authentication information. It characterized in that it comprises an IP search unit for transmitting the IP to the mobile phone through the communication module.

Further, according to another aspect of the present invention, the mobile phone of the present invention is predetermined user authentication information; A communication module connectable to a server storing a floating IP corresponding to the user authentication information; A connection control unit which transmits the user authentication information to the server, receives the floating IP corresponding to the user authentication information from the server, and connects to the computer terminal of the received floating IP; And a multimedia platform for downloading multimedia files from the connected computer terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a P2M system according to an embodiment of the present invention.

Referring to FIG. 1, the P2M system of the present invention includes a computer terminal 10, a server 20, a mobile phone 30, a base station 40, an internet 50, and a mobile terminal 60.

First, specific embodiments of the present invention for each of the computer terminal 10, the server 20, and the mobile phone 30 will be described sequentially with reference to Figs.

The computer terminal 10 is a computer device having a floating IP and no domain name, and the computer terminal 10 according to the embodiment of the present invention is schematically illustrated in FIG.

2, the computer terminal 10 includes a storage medium 11, an input unit 12, a network connection unit 13, and a multimedia platform 14.

The storage medium 11 stores at least one of a predetermined registered telephone number and user authentication information. The registered telephone number is a telephone number of the mobile phone 30 or the like to be connected to the computer terminal 10, and is registered in advance from the user. The user authentication information is user identification information, and an electronic signature, ID and password information, and an electronic certificate may be used.

The storage medium 11 also stores multimedia files before and after being converted into a standard format that can be played in the mobile phone 30. The storage medium 11 may be a hard disk drive (HDD), a compact disk (CD), a removable flash memory, or the like. Can be implemented.

The input unit 12 is for receiving selection information on a multimedia file from a user, and a general input means such as a keyboard, a mouse, and a touch screen may be used.

The network connection unit 13 is a module for connecting to the Internet 50 and may be implemented as a wired / wireless LAN card, a modem, or the like.

When the multimedia platform 14 is initialized or when the floating IP of the computer terminal 10 is updated, the multimedia platform 14 stores the floating IP assigned to the computer terminal 10 and a registered telephone number or user authentication information of the storage medium 11 on the Internet ( 50) to the preset server 20.

The multimedia platform 14 also selects a multimedia file of the storage medium 11 when the selection information is input from the user through the input unit 12, and transmits the selected multimedia file to the mobile terminal 60 such as the mobile phone 30. Is converted into a standard format that can be played back (hereinafter referred to as a mobile standard format) and stored in the storage medium 11. At this time, the multimedia platform 14 automatically generates a page (hereinafter referred to as a 'WAP page') for a list of multimedia files stored in the storage medium 11, and when a multimedia file converted into a mobile standard format is added. Update the WAP page.

The multimedia platform 14 loads the WAP page into RAM and immediately sends the WAP page to the mobile terminal 60 when the cellular phone 30 or the mobile terminal 60 is connected to the network connection 13. To be driven in the terminal 60. This is to greatly reduce the amount of transfer data and the process amount that the personal computer must process, and to prevent the personal computer from being overloaded.

In addition, when the multimedia file of the mobile standard format is requested from the mobile terminal 60, the multimedia platform 14 performs a download operation including streaming to the mobile terminal 60 such as the mobile phone 30.

3 is a schematic block diagram of a server 20 according to an embodiment of the present invention.

Referring to FIG. 3, the server 20 includes a storage medium 21, a communication module 22, a data manager 23, and an IP searcher 24.

The storage medium 21 may be a hard disk drive (HDD) or the like, and the communication module 22 may be implemented as a LAN card to access the Internet 50.

The data management unit 23 receives the floating IP and the registered telephone number (or user authentication information) from the computer terminal 10 through the communication module 22 and stores them in the storage medium 21 so as to correspond to each other.

The IP search unit 24 receives at least one of a unique phone number, a predetermined search phone number, and user authentication information from the mobile phone 30 or the mobile terminal 60, and matches the received unique phone number and the search phone number. The registered telephone number is searched or the user authentication information of the storage medium 21 matches the received user authentication information. Next, the IP search unit 24 transmits the floating IP corresponding to the retrieved registered phone number or user authentication information to the mobile terminal 60 or the mobile phone 30.

4 is a schematic block diagram of a mobile phone 30 according to an embodiment of the present invention.

4, the mobile phone 30 of the present invention includes a communication module 31, a connection control unit 32 and a multimedia platform 33.

The communication module 31 includes a wireless transceiver, a communication control processor, and the like, which can be connected to the Internet 50 through wireless communication with the base station 40.

The access controller 32 transmits the unique phone number (or user authentication information) of the mobile phone 30 to the server 20 through the communication module 31, and the floating IP corresponding to the unique phone number (or user authentication information). Is received from the server 20, and is connected to the computer terminal 10 of the received floating IP.

The multimedia platform 33 performs a download operation including streaming multimedia content from the computer terminal 10 of the received floating IP.

The mobile terminal 60 disclosed in FIG. 1 includes a mobile phone 30, a PDA, a laptop computer, a notebook computer, a mobile game machine, and the like, and includes a block similar to the block of the mobile phone 30 disclosed in FIG. However, not all of these mobile terminals 60 have a unique telephone number, such as a mobile phone 30, so that user authentication information may be used, or a predetermined search telephone number may be input from a user to replace the unique telephone number with a server ( 20) there is a difference in transmission.

FIG. 5 is a flowchart illustrating an example of a method of operating the P2M system disclosed in FIG. 1.

Referring to FIG. 5, a user registers his mobile phone number as a registered phone number through the input unit 12 of the computer terminal 10 and stores it in the storage medium 11 (S1). This registration telephone number can be updated at any time by the user.

When the user initializes the computer terminal 10, the floating IP is newly assigned to the computer terminal 10. When the floating IP is updated (S2), the multimedia platform 14 of the computer terminal 10 transmits the floating IP and the registered telephone number to the server 20 through the network connection 13 and the Internet 50 (S3). ).

Meanwhile, the user may select a multimedia file to be downloaded to the mobile terminal 60 (S4). The selected multimedia file is converted into a mobile standard format playable by the mobile terminal 60 by the multimedia platform 14 and stored (S5).

Although the mobile standard format differs from country to country or mobile carrier, for example, in Korea, the standard format of still images is JPEG type of size 176 × 144, and the standard format for video is MPEG4 and H263 type of size 176 × 144. The standard formats for music are AAC and AMR types. Therefore, the multimedia platform 14 is a JPEG type of 176 × 144 size, such as JPG, BMP, PNG, GIF, and MPEG4 or 176 × 144 size of a moving image such as avi, MPEG1,2,3, WMV, ASF. Convert to H263 type and save.

In particular, a computer terminal processes moving images in a standard such as NTSC and PAL as in a TV. Specifically, in the case of NTSC, the frames per second of the video is 30 [frame / sec.], And the transmission bit rate is 200 [Kbyte / sec.] Or more. This specification is not suitable for mobile use. Accordingly, the multimedia platform 14 converts and stores the transmission bit rate to 200 [Kbyte / sec.] Or less at 8 to 20 [frame / sec.] Per second of the video, thereby providing optimal streaming.

In addition, the multimedia platform 14 simultaneously converts and stores the multimedia content, and automatically generates and updates a WAP page and stores it in the RAM (S5).

The data management unit 23 of the server 20 stores the floating IP and the registered telephone number received from the computer terminal 10 in the storage medium 21 so as to correspond to each other (S6).

When the user who inputs the registered telephone number accesses the server 20 with his mobile phone 30, the server 20 parses the telephone number of the connected mobile phone 30 (S7) and matches it. The registered telephone number on the storage medium 21 is retrieved (S8).

If the registered phone number matching the phone number of the mobile phone 30 is found, the mobile IP 30 corresponding to the searched registered phone number is transmitted to the mobile phone 30 (S9), and if not found, an error message is returned (S10). ).

The mobile phone 30 connects to the computer terminal 10 based on the received floating IP (S11), and the computer terminal 10 immediately transmits the WAP page stored in the RAM to be driven in the mobile phone (S12). When the user of the cellular phone selects a file to download by referring to the multimedia file list on the WAP page, the multimedia platform 33 of the cellular phone downloads the multimedia file selected from the computer terminal 10 according to the HTTP and / or RTP protocol ( S13). The multimedia content may be downloaded and stored to be used as a ringtone, background music, movie watching, screen background, or the like, or may be streamed in real time and reproduced in real time through a player of the mobile phone 30 or the mobile terminal 60.

Note that in the flowchart disclosed in Fig. 5, each of the registered telephone number and the unique telephone number can achieve the same purpose even if replaced with the user authentication information. According to this embodiment, the mobile phone user can access his / her computer having the floating IP and use the multimedia contents without using the domain name.

On the other hand, unlike the case disclosed in FIG. 5, it is possible to consider a case where you want to connect to the computer terminal 10 of a friend instead of the computer terminal 10 of his own.

In this case, the user inputs the friend's mobile phone number into the mobile phone 30 and the mobile terminal 60 as a search phone number and transmits it to the server 20. The server 20 makes it possible to connect to the friend's computer terminal 10 by searching for the registered telephone number corresponding to the received search telephone number and returning the floating IP corresponding to the retrieved registered telephone number.

Therefore, not only the mobile phone 30, but also through the mobile terminal 60 does not have a unique telephone number, such as a laptop, PDA, using the search phone number and user authentication information of the computer terminal of the person and others having a floating IP ( 10) to access the multimedia content.

As described above, according to the present invention, a mobile terminal 30 and a mobile terminal 60 can be connected to a computer terminal having a floating IP without having a domain name, and multimedia content can be downloaded and streamed from the connected computer terminal.

Claims (23)

A mobile terminal having a unique telephone number and having Internet access; At least one computer terminal for transmitting a dynamic IP and a registered telephone number; And Storing the floating IP from the computer terminal and the registered telephone number so as to correspond to each other; and searching for the registered telephone number corresponding to the unique telephone number when the mobile terminal is connected, and corresponding to the retrieved registered telephone number. And a server for transmitting the floating IP to the mobile terminal to connect the mobile terminal to the computer terminal based on the received floating IP. The method of claim 1, And the computer terminal transmits a page for a list of multimedia files to the mobile terminal when the mobile terminal is connected. The method of claim 2, The mobile terminal selects at least one of the list of the multimedia file and transmits it to the computer terminal, And the computer terminal downloads the multimedia file received from the mobile terminal to the mobile terminal. The method according to claim 2 or 3, And the computer terminal converts and stores the multimedia file selected by the user into a predetermined standard format that can be played in the mobile terminal, and updates the page to include information of the converted multimedia file. The method according to claim 2 or 3, The computer terminal includes a RAM for storing the page, and when the mobile terminal is connected to the P2M system, characterized in that for transmitting the page from the RAM to the mobile terminal. The method according to claim 2 or 3, And the computer terminal includes a script to cause the page to run on the mobile terminal. The method according to claim 1 or 2, And the computer terminal transmits the updated floating IP and the registered telephone number to the server when the floating IP is updated. A mobile terminal for receiving and transmitting a search phone number from a user; At least one computer terminal for transmitting a dynamic IP and a registered telephone number; And Store the floating IP from the computer terminal and the registered telephone number so as to correspond to each other, and when receiving the search telephone number from the mobile terminal, retrieve the registered telephone number corresponding to the search telephone number, and search the registered number. And a server for transmitting the floating IP corresponding to the telephone number to the mobile terminal so that the mobile terminal connects to the computer terminal based on the received floating IP. system. In a computer terminal having a floating IP, A storage medium for storing at least one multimedia file; An input unit to receive selection information on the multimedia file from a user; A network connection that can be connected to the mobile phone through the Internet; And Selecting the multimedia file from the storage medium according to selection information from the input unit, converting the selected multimedia file into a predetermined standard format that can be played in the mobile phone, and storing the multimedia file in the storage medium; And a multimedia platform for downloading the multimedia file in a standard format to the mobile phone when a request for downloading the multimedia file is received from the mobile phone. The method of claim 9, The storage medium stores a predetermined registered telephone number; The network connection unit is connectable to a server for transmitting the floating IP to the mobile phone via the registered telephone number; And the multimedia platform transmits the floating IP and the registered telephone number to the server through the network connection unit when the floating IP is updated. The method of claim 9, The storage medium stores predetermined user authentication information; The network connection unit is connectable to a server for transmitting the floating IP to the mobile phone via the user authentication information; And the multimedia platform transmits the floating IP and the user authentication information to the server through the network connection unit when the floating IP is updated. The method according to any one of claims 9 to 11, And wherein the multimedia platform causes the page for the list of multimedia files to be driven in the mobile phone when the mobile phone is connected to the network connection based on the floating IP. The method of claim 12, Further comprises RAM; The multimedia platform reads the page of the list of multimedia files from the storage medium upon initialization and stores the page in the RAM, and transmits the page stored in the RAM to the mobile phone when the mobile phone accesses the network connection. Characterized by a computer terminal. The method of claim 12, And the multimedia platform causes the player for the multimedia file to be driven in the mobile phone when there is a streaming request of the multimedia file from the mobile phone through the network connection unit. The method according to claim 9, wherein The multimedia platform is characterized in that when converting a video file to a format that can be played in the mobile phone, the frame rate and the transmission bit rate of the video is reduced. In the server, Storage media; A communication module connectable to at least one computer terminal and a mobile phone via the Internet; A data management unit which receives the floating IP and the predetermined registered telephone number of the computer terminal from the computer terminal through the communication module and stores the floating IP and the registered telephone number in the storage medium so as to correspond to each other; And Receiving the unique telephone number of the mobile phone from the mobile phone through the communication module and searching for the registered phone number that matches the unique phone number, the dynamic IP corresponding to the retrieved registered phone number through the communication module Server comprising an IP search unit for transmitting to the mobile phone. In the server, Storage media; A communication module connectable to at least one computer terminal and a mobile terminal via the Internet; A data management unit which receives the floating IP and the predetermined registered telephone number of the computer terminal from the computer terminal through the communication module and stores the floating IP and the registered telephone number in the storage medium so as to correspond to each other; And Receive a predetermined search phone number from the mobile terminal through the communication module and search for the registered phone number that matches the search phone number, wherein the floating IP corresponding to the searched phone number is retrieved through the communication module. Server comprising an IP search unit for transmitting to the mobile terminal. In a mobile phone with a unique telephone number, A communication module connectable to a server storing a floating IP corresponding to the unique telephone number; A connection controller which transmits the unique telephone number to the server, receives the floating IP corresponding to the unique telephone number from the server, and connects to the computer terminal of the received floating IP; And And a multimedia platform for downloading multimedia files from the connected computer terminal. In a mobile terminal, An input unit for receiving a predetermined search telephone number from a user; A communication module connectable to a server storing a floating IP corresponding to the search telephone number; A connection controller which transmits the search telephone number to the server, receives the floating IP corresponding to the unique telephone number from the server, and connects to the computer terminal of the received floating IP; And And a multimedia platform for downloading multimedia files from the connected computer terminal. A mobile terminal having predetermined user authentication information and capable of internet access; At least one computer terminal for transmitting the registered user authentication information and the floating IP; And Store the dynamic IP and the user authentication information from the computer terminal so as to correspond to each other, receive the user authentication information from the mobile terminal, search for a match among the stored user authentication information, and correspond to the retrieved user authentication information. And a server configured to transmit the floating IP to the mobile terminal so that the mobile terminal connects to the computer terminal based on the received floating IP. The method of claim 20, And the computer terminal has a multimedia file in a format that can be played in the mobile terminal, and downloads the multimedia file to the mobile terminal according to request information from the connected mobile terminal. In the server, Storage media; A communication module connectable to at least one computer terminal and a mobile phone via the Internet; A data management unit which receives the floating IP and predetermined user authentication information of the computer terminal from the computer terminal through the communication module and stores the floating IP and the user authentication information in the storage medium so as to correspond to each other; And Receiving the user authentication information from the mobile phone through the communication module, and searching for a match with the received user authentication information of the user authentication information stored in the storage medium, the floating IP corresponding to the retrieved user authentication information Server comprising a IP search unit for transmitting to the mobile phone through the communication module. In a mobile phone having predetermined user authentication information, A communication module connectable to a server storing a floating IP corresponding to the user authentication information; A connection control unit which transmits the user authentication information to the server, receives the floating IP corresponding to the user authentication information from the server, and connects to the computer terminal of the received floating IP; And And a multimedia platform for downloading multimedia files from the connected computer terminal.

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