KR20090044320A - System and method for providing contents file using of peer-to-peer - Google Patents

System and method for providing contents file using of peer-to-peer Download PDF

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Publication number
KR20090044320A
KR20090044320A KR1020070110376A KR20070110376A KR20090044320A KR 20090044320 A KR20090044320 A KR 20090044320A KR 1020070110376 A KR1020070110376 A KR 1020070110376A KR 20070110376 A KR20070110376 A KR 20070110376A KR 20090044320 A KR20090044320 A KR 20090044320A
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KR
South Korea
Prior art keywords
content file
file
user terminal
terminal
information
Prior art date
Application number
KR1020070110376A
Other languages
Korean (ko)
Inventor
김상경
Original Assignee
내프랜드 주식회사
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Application filed by 내프랜드 주식회사 filed Critical 내프랜드 주식회사
Priority to KR1020070110376A priority Critical patent/KR20090044320A/en
Publication of KR20090044320A publication Critical patent/KR20090044320A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/40—Information retrieval; Database structures therefor; File system structures therefor of multimedia data, e.g. slideshows comprising image and additional audio data
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/10—Services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials

Abstract

The present invention provides a system in which a user terminal is provided with a content file. When the user terminal is connected, a balancing server which selects a connection server to which the user terminal is connected and transmits the information to the user terminal, receives a content file request message. And extracts at least one content file holding terminal, sets a file allocation amount for each extracted content file holding terminal, and connects the content file request response message including at least one content file holding terminal and file allocation information for each holding terminal. A command server for transmitting to the content file request response message, the at least one connection server for transmitting a content file transfer request message to each content file holding terminal, wherein each content file holding terminal includes the file allocation information. Content wave corresponding to Extracts and transmits the work to the user terminal, and the user terminal accesses the connection server, transmits a content file request message, and stores the content file that is divided and transmitted from each content file holding terminal in order. You can protect your copyrights and ensure that the playback of your screen doesn't stop in poor network conditions or sudden interruptions of peer devices.

Content, stream, DRM, p2p, priority

Description

System and method for providing content file by P2P method {System and Method for providing contents file using of peer-to-peer}

The present invention relates to a content file providing system and method by a P2P method in which a user terminal receives a content file in a P2P manner from a plurality of content file holding terminals.

Recently, with the development of digital technology and data compression technology, not only music and video digital data compression technology is rapidly developing but also the exchange of compressed digital data to play music or video as the Internet spreads around the world. The method is widely applied. These audio and video multimedia files have various formats such as mp3, mp4, dat, avi, aac, ra, rm, mid, sgf, mov, mpg, vob, wav, rjs, dvd, ram, wma, asf, etc. In particular, the technology of downloading mp3 files on the Internet and playing them with mp3-only players is rapidly spreading due to its simplicity.

Peer-to-peer (P2P) services are receiving the most attention among the multimedia data exchange methods on the Internet. P2P service is a technology that allows users to share files without a server by connecting computers directly to each other and allows peers to directly access other users' computers via the Internet and share various information and files, just like peers or friends. It is a service. Traditional web searches have allowed you to search for information only on a website and use the information and files registered on the website, but this technology provides a comprehensive search of the website, as well as the database of individuals or companies, and retrieves the information directly from your computer. The advantage is that it can be moved to.

However, in the related art, when the user intends to view the data again next time by introducing the streaming method, there are disadvantages of accessing the server again and the disadvantage of not being able to download and use the portable device currently in the spotlight.

In addition, since a user must access the server every time he wants to view a content file, the screen is delayed when the number of users is congested, and thus, satisfactory quality cannot be guaranteed.

In addition, if the device for transmitting the content file is suddenly terminated, the user may not download the corresponding content file.

An object of the present invention is to support the downloading and streaming at the same time to meet the needs of users who want to re-view and carry on the portable device while protecting the copyright of the content file, while playing the screen even in poor network environment or sudden interruption of the peer device The present invention provides a system and method for providing a content file using a P2P method that can be supported at any time.

Another object of the present invention is to provide a content file by a P2P method that allows a user terminal to easily search for a multimedia file in a peer device by analyzing the search word when a user inputs a search word for a content file search using a user terminal. The present invention provides a system and method.

According to an aspect of the present invention to achieve the above object, in a system in which a user terminal is provided with a content file in a P2P manner from at least one content file holding terminal, when the user terminal requests access, the provided database A search server selects a connection server to which the user terminal is to connect, and transmits information of the connection server to the user terminal. When a content file request message is received from the connection server, the provided database is searched for at least one content. A command for extracting a file holding terminal, determining a file allocation amount for each extracted content file holding terminal, and transmitting a content file request response message including at least one content file holding terminal and file allocation amount information for each holding terminal to the connection server; Server, the command If the content file request response message is received from the server, the server includes at least one connection server for transmitting a content file transfer request message including file quota information to each content file holding terminal, wherein each content file holding terminal includes the connection. The content file corresponding to the file quota information of the content file transmission request message received from the server is extracted and transmitted to the user terminal in a P2P manner, and the user terminal corresponds to the connection server according to the information of the connection server transmitted from the balancing server. A content file providing system according to the P2P method is provided, characterized in that for transmitting a content file request message and storing a content file which is divided and transmitted from each content file holding terminal in order.

The content file request message transmits a content file request message including content file information, user ID, and connection server information input / selected by the user to the connection server.

The content file information includes at least one of a file name, a playing time, a frame number, a content classification, a keyword, and the content file holding terminal is at least one of a wired terminal and a mobile terminal.

The balancing server may include a database including at least one of a connection server information database and a user information database, and when the user terminal requests access, determining whether the user terminal is an authenticated user by using information registered in the user information database. The authentication unit may include a connection server selecting unit configured to select a connection server to which the user terminal is connected after searching the connection server information database to determine the state of each connection server.

The connection server information database is registered with one or more connection server information connected to the balancing server, and includes at least one of IP, thread number, memory usage rate, and CPU speed of each connection server.

The connection server selecting unit determines and selects a connection server having a low load by using at least one of a usage rate, a memory amount, and a CPU usage rate registered in the connection server information database.

The command server may search for the content file information database by searching for the content file information database when a content file request message is received from the database including at least one of a content file information database and a connection list information database. A content file retrieval unit for extracting a user ID possessing a user ID, searching the connection list information database, and extracting a content file holding terminal in a connected state from the extracted user IDs; And a file allocator configured to prioritize the terminals and determine a file quota for each terminal.

The content file information database may include a classification, title, maker, content, connection file path, file name, play time, number of frames, content classification, user ID, number of downloads, keywords, access information, and the like for classification of music and video. At least one of the price, the last connection time.

The connection list information database includes at least one of a user ID, a mac address, a CPU speed, a network speed, an IP, an authentication status, and access information. The connection list information database is connected to a corresponding connection server whenever the list of terminals connected to each connection server is updated. Is updated by

The content file search unit searches the connection file information database to extract content file information corresponding to a search word of the content file request message, and has a user ID having a content file that matches a play time and a frame number among the extracted content file information. Extract

The file allocator determines the priority of the extracted content file holding terminals using the CPU speed and / or the network speed registered in the connection list information database, and the file allocation amount to be transmitted for each holding terminal using the determined priority. Determine.

In addition, the file allocator determines the priority of the content file holding terminals by using the number of content file downloads of the content file holding terminals extracted by the content file searching unit, and determines a transmission file allocation amount according to the determined priority.

The file quota information is divided by time stamp or frame number.

The user terminal determines the order of each content file by using the time stamp or frame number of the content file that is divided and transmitted from each content file holding terminal and stores them in order.

According to another aspect of the present invention, in a user terminal receiving and playing a content file in a P2P manner from a plurality of content file holding terminals, a content database in which the content file is stored, a user interface for receiving a user command, and the user interface unit A search term analysis unit for extracting a meaningful search term by analyzing the search term inputted through the search, and generating a content file request message including the extracted significant search term, a time stamp of a content file that is divided and transmitted from the plurality of content file holding terminals, or A file division management unit arranged in order using a frame number, a file format conversion unit converting a content file transmitted from the file division management unit into a DRM file, or a DRM file into a stream file, and a content wave through the user interface unit. When the reproduction command is input, the user terminal is provided for reproducing received service content file to the playback unit and the P2P system comprising: a communication unit for communicating with the content data file held terminal to play the content file.

The content file divided and transmitted from the content file holding terminal is a stream file including a time stamp and / or a frame number, a data classification, an original author ID, a data size, and data.

The DRM file may include a file header, a time stamp, a media type, and a frame data size including at least one of an original author ID, an original author name, a user ID, a user name, a copyright type, a total play time, a total number of frames, and a start point of multimedia data. And a frame header including at least one of offsets of the data, and data of the video and the audio.

When the DRM file is converted into a stream file, the file format conversion unit decodes the corresponding DRM file, divides the decoded DRM file based on a time stamp, and converts the decoded DRM file into a stream file.

According to another aspect of the present invention, in a system equipped with a balancing server, one or more connection servers connected to the balancing server, and a command server connected to the connection server, the user terminal is a content file in a P2P manner from the at least one content file holding terminal. In the receiving method, (a) when the user terminal requests the connection from the balancing server, selecting the connection server to be connected to the user terminal, and transmitting the selected connection server information to the user terminal, (b When the user terminal is connected to the connection server, a content file search screen is provided to the user terminal, and when a content file request message including a search word is received from the user terminal, the content file request message is transmitted to the command server. (C) at the command server When the content file request message is received, the terminal searches for the content file holding terminal that holds the corresponding content file, sets a file allocation amount according to the priority of the found content file holding terminal, and stores at least one content file holding terminal and a file for each holding terminal. Transmitting a content file request response message including quota information to the connection server; (d) transmitting the content file including corresponding file quota information to each content file holding terminal according to the content file request response message at the connection server; Transmitting a request message, (e) P2P-connecting each content file holding terminal to the user terminal, extracting a content file corresponding to the file quota information, and transmitting the extracted content file to the user terminal; and (f) the user terminal. From each terminal holding the content file There is provided a content file providing method according to a P2P method, comprising the step of storing divided and transmitted content files in sequence using a time stamp.

In the step (a), if the user terminal requests access, performing user authentication; if the user terminal is an authenticated user, selects a connection server to which the user terminal connects and connects to the user terminal information; And transmitting the connection to the connection server corresponding to the connection server information transmitted from the balancing server.

In the step (b), when the user terminal is connected to the connection server, the connection information of the connection of the user terminal is transmitted to the command server to update the connection list information of the command server, and the content is transmitted to the user terminal. Providing a file search screen; when a search word is input through the content file search screen at the user terminal, the search term is analyzed to extract a meaningful search term, and a content file request message including the extracted meaningful search term is received. Generating and transmitting to the connection server, the connection server transmitting the content file request message to the command server.

The connection information includes at least one of a user ID, a mac address, a CPU speed, a network speed, an IP, a public authentication, and access information.

In the step (c), when a content file request message is received from the user terminal, searching and extracting a database including content file information corresponding to a search word included in the content file request message, the extracted content file Searching for a content file holding terminal that is connected to a network among terminals having information, determining a file allocation amount by prioritizing the retrieved content file holding terminals, and including the content file holding terminal and file allocation information for each holding terminal; Sending a content file request response message to the connection server.

Determining a file allocation amount according to the priority of the retrieved content file holding terminal includes the CPU speed and / or network speed of the retrieved content file holding terminals, the number of open sockets, the number of downloads of the corresponding content file, the bandwidth or proximity to the user terminal. A priority is determined using at least one, and a file quota is determined using the determined priority.

In the step (e), P2P connection with the user terminal, extracting a corresponding content file according to the content file transfer request message, converting the extracted content file into a stream file using a time stamp, And transmitting the stream file corresponding to the file quota information to the user terminal.

In step (f), when the stream file is received from each content file holding terminal, the stream files are sequentially stored using a time stamp. When the reception of the stream file from each content file holding terminal is completed, the stored Determining whether the stream file is normal, and if the stream file is normal, converting the stream file into a DRM file and storing the stream file.

As described above, according to the present invention, in order to satisfy the needs of users who want to re-view and carry on a portable device while protecting the copyright of the content file, providing a content file by a P2P method that can seamlessly support downloading and streaming. Systems and methods can be provided.

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

1 is a view showing a content file providing system by a P2P method according to the present invention.

Referring to FIG. 1, a content file providing system using a P2P method may include a balancing server 100, one or more connection servers 110a, 110b,... 110n connected to the balancing server 100, hereinafter referred to as 110. The command server 130 connected to the connection server and the user terminal 120 requesting a content file from the connection server 110 and downloading the corresponding file.

When the balancing server 100 requests the connection of the user terminal 120, the balancing server 100 checks the state of the connection server 110 that is connected, and provides connection server information to which the user terminal 120 is connected. ) To allow the user terminal 120 to be connected to the connection server.

That is, the balancing server 100 measures the IP of the connection server, the number of threads, the number of open sockets, the remaining memory amount, the utilization rate, the CPU utilization rate, and the like to the connection server with the lowest load when the user terminal 120 is connected. It serves to connect the user terminal 120.

A detailed description of the balancing server performing the above role will be given with reference to FIG. 2.

The connection server 110 is connected to the user terminal 120 under the control of the balancing server 100, so that the user terminal 120 downloads the content file from the one or more content file holding terminal by P2P method. To control.

In addition, the connection server 120 transmits connection server information including the IP, the number of threads, the amount of memory, the computer utilization rate, the CPU speed, and the like to the balancing server 100 at predetermined time intervals.

In addition, the connection server 110 transmits connection list information to the command server 130 whenever the list of terminals to be connected is updated to update the connection list information. The connection list information includes a MAC address, a user ID, a CPU speed network speed, an outgoing IP, an internal IP, a private status, a thread, and the like.

The user terminal 120 is a terminal connected to the connection server 110 through a network, and may refer to a mobile communication terminal or a wired communication terminal.

The user terminal 120 converts the general content file into a DRM file and stores the converted content file, and when a transfer command of the stored content file is input from another user terminal, the user terminal 120 converts the DRM file into a stream file and uses the P2P method. Transmit to 120. In this case, if the content file transmission request message includes quota information, the user terminal 120 checks the data of the corresponding allocation area by using information such as a time stamp of the corresponding content file and streams the identified data. To send.

In addition, the user terminal 120 indexes the stream data, which is divided and transmitted from one or more other user terminals in a P2P manner, by time stamping, and stores the stream data in order in the reception buffer, and when the download of the content file is completed, the corresponding stream file File is saved as DRM file.

In this case, since the divided stream file includes a time stamp, the user terminal 120 sequentially stores the transmitted stream file using the time stamp.

In addition, if there is a frame in which the download is interrupted among the divided and transmitted stream files, the user terminal 120 may download the request again from the corresponding terminal or request the frame from another terminal.

In addition, when a query is input by a user through a content file search screen, the user terminal 120 determines which language the input query is in, and classifies morphemes to extract meaningful words. Then, the user terminal 120 transmits the content file request message including the extracted meaningful word to the connection server 110.

A detailed description of the user terminal 120 performing the above role will be described with reference to FIG. 7.

When the command server 130 receives a content file request message from the connection server 110, the command server 130 searches for a database provided to extract at least one content file holding terminal and calculates a file allocation amount for each extracted content file holding terminal. And transmits a content file request response message including at least one content file holding terminal and file allocation information for each holding terminal to the connection server 110.

A detailed description of the command server 130 performing the above role will be given with reference to FIG. 4.

FIG. 2 is a block diagram schematically showing the configuration of the balancing server shown in FIG. 1, and FIG. 3 is a diagram showing the connection server information DB shown in FIG.

Referring to FIG. 2, the balancing server includes a service manager 200, an authentication unit 210, a connection server selecting unit 220, a communication unit 230, and a database 240.

The service manager 200 interprets a command transmitted from a user terminal connected through a network, and causes the corresponding device to operate according to the analysis result.

That is, when the access request message is input from the user terminal, the service manager 200 transmits user authentication information to the authentication unit 210 for user authentication. Here, the user authentication information includes a user ID, a password, a unique number of the user terminal, and the like.

In addition, when the authentication information is received from the authentication unit 210, the service manager 200 generates a connection server selection command for selecting a connection server to be connected to the user terminal to the connection server selection unit 220. send.

The database 240 includes a user information database 242 in which user information is stored, and a connection server information database 244 in which connection server information is stored.

The user information includes a user ID, a password, a user terminal unique number, and the like.

The connection server information database 244 is registered with one or more connection server information connected to a balancing server, and the connection server information database 244 will be described with reference to FIG. 3.

Referring to FIG. 3, the connection server information database 244 registers the IP, the number of threads, the memory utilization rate, the CPU speed, and the like of each connection server.

Accordingly, when the user terminal requests access, the balancing server checks network bandwidth, the number of sockets in use, CPU utilization, etc. for each connection server in the connection server information database 244, and the connection server having the lowest load is the user. Connect to the terminal.

The authentication unit 210 determines whether the user (or user terminal) that has made the authentication request is an authenticated user.

That is, when the authentication unit 210 receives a user authentication request command from the service manager 200, the authentication unit 210 determines whether the user authentication information in the user authentication request command is information registered in the user information database 242. Determine whether the user is an authenticated user. If the user authentication information is the information registered in the user information database 242 as a result of the determination, the authentication unit 210 transmits authentication confirmation information to the service manager 200, and if not registered information, authentication is impossible. The information is transmitted to the service manager 200.

When the connection server selection command is received from the service manager 200, the connection server selecting unit 220 determines the state of each connection server using the connection server information database 244, and then accesses the user terminal. Select the connection server.

That is, the connection server selector 220 measures the IP, the number of threads, the number of sockets, the amount of memory, the utilization rate, the CPU utilization rate, and the like of the connection server registered in the connection server information database 244, and has the lowest load. Select.

Then, the connection server selecting unit 220 transmits the selected connection server information to the corresponding user terminal through the communication unit 230. Then, the user terminal is connected to the selected connection server.

4 is a block diagram schematically showing the configuration of a command server according to the present invention, FIG. 5 is a view showing a content file information DB shown in FIG. 4, and FIG. 6 is a view showing a connection list information DB shown in FIG. to be.

Referring to FIG. 4, the command server includes a service manager 400, a content file searcher 410, a file allocator 420, a communication unit 430, and a database 440.

When the content file request message is received from the connection server, the service manager 200 transmits a content file request message to the content file search unit 410.

The database 440 includes an original author information database 442 storing original author information, a content file information database 444 storing content file information, and a connection list information database 446 storing information of a user terminal connected to a connection server. do.

The content file information database 444 is configured as shown in FIG. 5. Referring to FIG. 5, the content file information database 444 includes a section indicating a music or a video, a title indicating a title, a maker, a content, a path, File names, playback times, frames, content classifications, user IDs, downloads, keywords, connection information, prices to be received, and last connection time are registered. The maker refers to the singer if the music, the director if the video, the content and the name and the name of the performer if the music.

Therefore, when the content file request message is input from the user terminal or the connection server, the command server extracts content file information corresponding to the search word of the content file request message, and the number of frames and the playback time of the extracted content file information. The content file information matching the back is extracted from the content file information database 444. Then, the command server determines whether the corresponding terminal is currently connected by using a user ID among the extracted content file information.

The connection list information database 446 stores connection information of a user terminal connected to a connection server, as shown in FIG. 6.

Referring to Fig. 6, the connection list information database 446 registers information such as a user ID, a mac address, a CPU speed, a network speed, an IP, an authentication status, a connection status, and the like. The connection list information database 446 is updated by the connection server whenever the list of terminals connected to each connection server is updated.

Therefore, the command server determines whether the corresponding terminal is being connected using the connection information of the connection list information database 446.

When the content file search request command is input from the service management unit 400, the content file search unit 410 sends content file information corresponding to a search word included in the content file search request command to the content file information database 444. ).

Then, the content file search unit 410 extracts connection list information corresponding to the user ID of the searched content file information from the connection list information database 446, determines whether the corresponding user terminal is currently connected, and currently accesses Extract the terminal being used.

Then, the content file search unit 410 transmits the search result information including the extracted content file holding terminal information and content file information for each holding terminal to the connection server through the communication unit 430.

In addition, the content file search unit 410 transmits a file allocation command including the extracted terminal information to the file allocation unit 420.

When the file allocation command is received from the content file retrieval unit 410, the file allocator 420 determines the priority of the content file holding terminals and determines a transmission file allocation amount according to the determined priority.

That is, the file allocator 420 determines the priority using the retrieved content file holding terminals such as CPU speed and network speed, and allocates the amount of files to be transmitted to each terminal using the determined priority. .

In addition, the file allocator 410 determines the priority of the content file holding terminals by using the downloaded number of content files retained by the searched content file holding terminals, and determines a transmission file allocation amount according to the determined priority.

In addition, the file allocator 410 obtains a bandwidth or proximity to the corresponding user terminal for each retrieved content file holding terminal, and determines a transmission file allocation amount by prioritizing using the obtained bandwidth or proximity.

Thereafter, the file allocator 410 transmits a content file transfer request message including quota information for each content file holding terminal to the connection server through the communication unit 430.

Then, the connection server transmits a content file transfer request message to each content file holding terminal, and each content file holding terminal performs a P2P connection with the corresponding user terminal and transmits the corresponding content file by the quota amount.

FIG. 7 is a block diagram schematically illustrating a configuration of a user terminal receiving a content file from at least one terminal through P2P according to the present invention. FIG. 8 is a detailed block diagram illustrating the configuration of a file format conversion unit illustrated in FIG. 7. 9 illustrates the format of a DRM file according to the present invention, and FIG. 10 illustrates the format of a stream file according to the present invention.

Referring to FIG. 7, a user terminal provided with a content file from one or more terminals through P2P includes a user interface unit 600, a controller 610, a file division manager 620, a file format converter 630, and a playback unit. 640, a communication unit 650, a content database 660, and a search word analyzer 670.

The user interface unit 600 serves to receive a user command, for example, a keypad, a mouse, or the like. That is, the user may input a search word for a desired content file using the user interface 600.

The controller 610 plays a role of controlling the user terminal as a whole. The controller 610 interprets a command input through the user interface 600 and operates the device according to the analysis result.

The file division managing unit 620 temporarily stores a stream file that is divided and transmitted from a plurality of content file holding terminals in a buffer to be streamed and reproduced in the playback unit 640. Since the divided stream file includes a time stamp, the file division management unit 620 stores the transmitted stream file in order using the time stamp.

In addition, if there is a frame in which the download is interrupted among the divided and transmitted stream files, the file division management unit 620 may download the request again from the corresponding terminal or request the frame from another terminal.

In addition, the file division management unit 620 transmits a stream file in a frame unit to the file format conversion unit 630 to store the DRM file when the content files are downloaded from the plurality of content file holding terminals.

The file format converter 630 converts a DRM file into a stream file or a stream file into a DRM file. That is, the file format conversion unit 630 converts the stream file stored in the buffer of the file division management unit 620 into a DRM file when the command to convert the DRM file is input from the file division management unit 620. To be stored in database 660.

In addition, when the file format conversion unit 630 receives a content file transfer command from the control unit 610, the file format conversion unit 630 extracts the DRM file from the content database 660 and converts the DRM file into a stream file, and then the communication unit 650. To be transmitted to the terminal through.

A file format conversion unit 630 which performs the above role will be described with reference to FIG. 8.

Referring to FIG. 8, the file format converter 630 includes an extractor 632, a decoder 634, a DRM-stream format converter 636, and a file divider 638.

When the content file transfer command is received from the controller 610, the extractor 632 extracts the corresponding content from the database 660 and transmits the content to the decoder 634. That is, since the content file transfer command includes content information and quota information, the extractor 632 extracts a corresponding content file from the content database 660 using the content information. The extracted content file may be a DRM file or a stream file.

The decoder 634 decodes the content file transmitted from the extractor 632 and transmits the decoded content file to the DRM-stream format converter 636.

If the decoded content file is a DRM format, the DRM-stream format converter 636 converts the content file having a DRM format as shown in FIG. 9 into a stream format as shown in FIG.

Referring to FIG. 9, the DRM file 800 includes a file header 810, a frame header 820, and data 830 such as video and video.

The file header 810 includes an original author ID, original author name, user ID, user name, copyright type, total playback time, total number of frames, multimedia data start position, and the frame header 820 includes a time stamp and a media type. , Frame data size, data offset.

Referring to FIG. 10, a stream file includes a time stamp, data classification, original author ID, data size, and data.

Accordingly, the DRM-stream format converter 636 extracts a time stamp, data classification, original author ID, data size, and data corresponding to the stream data format from the file in the DRM format to convert the file in the DRM format into a file in the stream format. Convert.

The file dividing unit 638 divides a file of the stream format converted by the DRM-stream format converting unit 636 based on a frame number or a time stamp, extracts a frame corresponding to the quota information, and extracts a frame corresponding to the communication unit ( 650).

Referring to FIG. 7 again, the playback unit 640 plays a corresponding content file when a content file playback command is input from the user interface unit 600.

The downloaded content file is stored in the content database 660 in a DRM or stream format.

The search term analysis unit 670 analyzes the query word input through the user interface unit 600 and extracts a meaningful search term. That is, when the query word is input through the user interface unit 600, the search word analyzer 670 identifies which language the query word is, and classifies morphemes to extract meaningful words. Then, the search word analyzer 670 transmits the content file request message including the extracted meaningful search word to the connection server through the communication unit 650.

The user terminal configured as described above temporarily stores a stream file divided and transmitted from a plurality of content file holding terminals in a buffer for streaming playback in the playback unit 640, and a content file transmission request message using P2P from another terminal. If received, it serves to transmit the content file as much as the quota through the P2P.

11 is a flowchart illustrating a method of downloading a content file by a user terminal using a P2P scheme according to an exemplary embodiment of the present invention.

Referring to FIG. 11, when a user terminal requests access to a balancing server (S1000), the balancing server determines whether the user is an authenticated user using a user information database (S1002).

The access request command includes a terminal unique number and the like, and the balancing server determines whether the terminal unique number is registered in the user information database to determine whether the user is an authenticated user.

If it is determined in step 1002 that the terminal is an authenticated user, the balancing server selects a connection server to be connected to the user terminal and transmits connection server information for accessing the user terminal (S1004).

That is, the balancing server selects the connection server with the lowest load by measuring the IP, the number of threads, the number of sockets, the amount of memory, the utilization rate, the CPU utilization rate, etc. of the connection server registered in the connection server information database, and then selects the selected connection server. Send information to the user terminal.

Then, the user terminal accesses the connection server corresponding to the connection server information transmitted from the balancing server (S1006). At this time, the user terminal transmits its user information to the connection server. The user information may be a terminal unique number.

When step 1006 is performed, the connection server transmits connection information by connecting to the user terminal to the command server (S1008), and the command server uses a connection list information database using the connection information transmitted from the connection server. Update (S1010).

That is, when the connection server is connected to the user terminal, the connection server measures a CPU speed, a network speed, and the like by connection, and connects the connection information including the measured CPU speed, network speed, user ID, MAC address, IP, and the like. Send to command server.

The command server then registers the transmitted connection information in the connection list information database.

When step 1010 is performed, the command server transmits a content file search screen for searching for a content file to the connection server (S1012), and the connection server transmits a content file search screen to the user terminal (S1014). .

Then, the user terminal displays a content file search screen, and the user requests a content file through input of a search keyword or selection in a search list through the displayed content file search screen.

In addition, the user inputs a query word through the displayed content file search screen. Then, the user terminal grasps the language of the input query language and classifies morphemes to extract meaningful words. The user terminal then transmits a content file request message including the extracted meaningful search word to the connection server.

After performing step 1014, when the user terminal transmits a content file request message to the connection server (S1016), the connection server transmits the content file request message to the command server (S1018). The content file request message includes content information input or selected by a user, a user terminal unique number, and the like.

When step 1018 is performed, the command server retrieves corresponding content file information from a content file information database according to the content file request message (S1020). That is, the command server extracts content file information corresponding to a search word in the content file request message from the content file information database, and matches the number of frames, the playing time, etc. of the extracted content file information requested by the user. The content file information corresponding to the content file information is extracted.

For example, the command server determines whether it is music or a video based on the extension of the search word in the content file request message or the content of the analyzed morpheme. In addition, it is determined whether the content of the search word is a singer or a director according to the presence or absence of a singer or a director who is a search term of the morpheme. In addition, it is determined whether the search term of the analyzed morpheme is requesting lyrics or movie contents. If this is not the case, you can do a full text search in the Database Lyrics (Content) field to find the object you want to find, increasing the accuracy and speed of the search.

The command server then extracts content file information corresponding to the determined condition from the content file information database.

After performing step 1020, the command server extracts a terminal that is currently connected from the terminal having the corresponding content file (S1022).

That is, the command server determines the user ID of the content file holding terminal using the content file information database, and determines whether the terminal corresponding to the determined user ID is currently connected using the connection list information database.

Since connection information of a terminal is registered in the connection list information database, the command server may determine whether the terminal is currently connected using the connection information.

After performing step 1022, the command server determines the priority of the extracted terminals to determine the transmission allocation amount of the content file for each terminal (S1024).

That is, the command server checks the network bandwidth, the number of sockets in use, the CPU utilization rate, etc. of the extracted terminals using a connection list information database, and determines the priority using the checked information. The command server then determines an allocation amount of the content file to be sent to the user terminal according to the determined priority.

In this case, the allocation amount may be determined based on a time stamp or frame number of the corresponding content file.

After performing step 1024, the command server transmits a content file request response message including the determined quota information to the connection server (S1026). The content file request response message includes content file holding terminal information and quota information for each content file holding terminal.

When step 1026 is performed, the connection server transmits a content file transfer request message to the corresponding content file holding terminal according to the content file request response message (S1028).

Then, the terminal transmits the content file assigned to the user terminal.

A method of transmitting a content file in a P2P manner by the content file holding terminal will be described with reference to FIG. 12.

12 is a flowchart illustrating a method in which a content file holding terminal transmits a content file to a user terminal using P2P according to the present invention.

Referring to FIG. 12, when a content file transfer request message is received from a connection server (S1100), the content file holding terminal performs a P2P connection with the corresponding user terminal (S1102).

Here, the content file transfer request message includes quota information based on a time stamp or frame number and user terminal information.

Accordingly, the content file holding terminal performs a P2P connection with the corresponding user terminal using the user terminal information, and prepares an allocation amount corresponding to the quota information for the content file.

After performing step 1102, the content file holding terminal extracts the corresponding content file included in the content file transfer request message from a database (S1104), and determines whether the extracted content file is a file in a DRM format (S1106). .

If it is determined in step 1106 that the extracted content file is a file in a DRM format, the content file holding terminal decodes the DRM file and converts it into a stream file (S1108). That is, the content file holding terminal decodes the DRM file and converts the DRM file into a stream file based on a frame number or a time stamp.

After performing step 1108, the content file holding terminal extracts a frame corresponding to the quota information from the converted stream file and transmits it to the user terminal (S1110). Here, the quota information may be information arbitrarily determined by the command server or information determined by the user of the user terminal.

If it is determined in step 1106 that the extracted content file is not in a DRM format and is in a stream format, the content file holding terminal performs step 1110.

The user terminal stores a content file transmitted from one or more content file holding terminals, which will be described in detail with reference to FIG. 13.

13 is a flowchart illustrating a method in which a user terminal receives a content file from at least one content file holding terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 13, when a stream file is received from at least one content file holding terminal (S1200), the user terminal sequentially stores the received stream file in a buffer using a time stamp (S1202).

That is, the user terminal generates a reception buffer and stores the stream files in order according to the time stamp order regardless of the order of the content file holding terminal.

That is, when a stream file is received from any content file holding terminal, the user terminal sequentially searches for data in the buffer and compares time stamps. Then, when the user terminal finds an item having a late time stamp, the user terminal inserts the stream file in the order and arranges the corresponding content file.

In this case, a transmission confirmation screen for each content file holding terminal is displayed on the user terminal so that the user can know whether the corresponding content file has been received.

After the execution of step 1202, when the reception of the content file from all the content file holding terminals is completed (S1204), the user terminal determines whether the stream file stored in the buffer is normal (S1006). That is, the user terminal determines whether the download of the stream file stored in the buffer is less or there is an error.

If it is determined in step 1006 that the stream file is normal, the user terminal converts the stream file into a DRM file and stores it (S1008).

If it is determined in step 1006 that the stream file is not normal, the user terminal checks an abnormal area and performs restoration (S1210), and then performs step 1208.

According to another embodiment of the present invention, if the stream file is not normal as a result of the determination of step 1006, the user terminal may perform step 1208 by ignoring the abnormal area. In other words, since the stream file is converted into stream data so that the stream file is not affected even if it is ignored, the stream file can be played even if it is not normal.

14 is a flowchart illustrating a method for a terminal to download a content file using a P2P scheme according to another exemplary embodiment of the present invention.

Referring to FIG. 14, since step 1300 to step 1314 are the same as step 1000 to step 1014 of FIG. 11, a description thereof will be omitted.

When step 1314 is performed, the user terminal displays the content file search screen, and the user requests a content file search through selection of a keyword or a search list through the displayed content file search screen.

Then, the user terminal transmits a content file search request message to the connection server (S1316), and the connection server transmits a content file search request message to the command server (S1318). The content file search request message includes keyword or list selection information and user terminal information for searching for a content file.

When step 1318 is performed, the command server searches for corresponding content file information in a content file information database according to the content file search request message (S1320), and extracts a terminal that is currently connected from a terminal having the corresponding content file ( S1322).

After performing step 1322, the command server transmits the search result information including the searched content file information and the access terminal information to the connection server (S1324), and the connection server transmits the search result information to the user terminal. (S1326).

Then, the user terminal displays the search result information transmitted from the connection server in a list. In this case, the displayed search result information includes content file holding terminal information and file information for each holding terminal, and the terminal information includes a user ID, a network speed for each terminal, the number of sockets used, a CPU speed, and the like.

When step 1326 is performed, the search result information is displayed on the user terminal (S1328), and the user selects a content file based on the displayed search result information (S1330). When the user selects a content file, each content file holding terminal transmits a content file corresponding to the quota information to the user terminal.

Then, the user terminal receives and stores the content file transmitted from each content file holding terminal (S1332). Since the user terminal receives and stores a content file from each content file holding terminal in FIG. 13, a detailed description thereof will be omitted.

According to another preferred embodiment of the present invention, after performing step 1322, the command server determines the priority of the extracted content file holding terminals to determine the transmission allocation amount of the content file for each terminal, and then the content file holding terminal information. The search result information including file information for each terminal and quota information may be transmitted to the user terminal through the connection server.

Then, the search result information is displayed on the user terminal, and may receive and store a file transmitted from each content file holding terminal.

15 is a diagram illustrating a content file providing system using a P2P scheme according to another exemplary embodiment of the present invention.

Referring to FIG. 15, a content file providing system using a P2P method requests a balancing file 1400 that provides content file information and a content file from the balancing server 1400, and sends the corresponding file to one or more content files using a P2P method. The user terminal 1410 downloads from the holding terminal.

When the content file request message is input from the user terminal 1410, the balancing server 1400 searches for corresponding content file information and determines whether a terminal having the found content file information is currently connected.

Then, the balancing server 1400 determines priorities of the terminals currently connected, determines the transmission quota of the content file, and transmits them to the corresponding terminals.

A detailed description of the balancing server 1400 performing the above role will be given with reference to FIG. 16.

The user terminal 1410 is a terminal connected to the balancing server 1400 through a network, and may refer to a mobile communication terminal or a wired communication terminal.

When the user terminal 1410 requests the content file from the balancing server 1400, the balancing server 1400 extracts a terminal having the corresponding content file and downloads the corresponding content file through the extracted terminal. Make sure

Since the user terminal 1410 performing the above role has been described with reference to FIG. 7, a detailed description thereof will be omitted.

According to another embodiment of the present invention, the command server may perform the operation of performing the balancing server by replacing the balancing server with a command server.

16 is a block diagram schematically illustrating a configuration of a balancing server according to another exemplary embodiment of the present invention.

Referring to FIG. 16, the balancing server includes a service manager 1500, an authentication unit 1510, a content file search unit 1520, a file allocator 1530, a communication unit 1540, and a database 1550.

The service manager 1500 interprets a command transmitted from a user terminal connected through a network, and causes the corresponding device to operate according to the analysis result.

That is, when a user authentication request command is input from the user terminal, the service manager 1500 transmits user authentication information to the authentication unit 1510 for user authentication. Here, the user authentication information includes a user ID, a password, a unique number of the user terminal, and the like.

In addition, when the content file request message is input from the user terminal, the service manager 1500 transmits a content file information search command to the content file search unit 1520.

Since the authentication unit 1510, the content file search unit 1520, the file allocator 1530, the communication unit 1540, and the database 1550 are the same as those of FIG. 2, the description thereof will be omitted.

17 is a flowchart illustrating a method of transmitting, by a balancing server, content file information requested by a user according to another exemplary embodiment of the present invention.

Referring to FIG. 17, when a user terminal is connected (S1600), the balancing server determines whether the user terminal is an authenticated user (S1602).

If it is determined in step 1602 that the user terminal is an authenticated user, the balancing server transmits a content file search screen to the user terminal (S1604).

Then, a content file search screen is displayed on the user terminal, and the user inputs or selects a desired content file as a keyword from the list using the displayed content file search screen.

Then, the user terminal transmits a content file request message including a keyword or list selection information input by the user to the balancing server.

After the execution of step 1604, if a content file request message is input from the user terminal (S1606), the balancing server retrieves the content file information requested by the user from the content file information database (S1608).

Then, the balancing server searches for the currently connected terminal among the searched content file holding terminals (S1610), and determines the transmission allocation amount of the corresponding content file by determining the priority of the searched access terminals (1612).

That is, the balancing server sets the priority by using at least one of the CPU speed and / or network speed of the searched access terminals, the number of downloads of the corresponding content file, bandwidth or proximity to the user terminal, and uses the determined priority. To set the transfer quota for the content file.

After performing step 1612, the balancing server transmits a content file transfer request message including the determined delivery quota information to the corresponding terminals (S1614).

Then, the corresponding terminals transmit the corresponding content file to the user terminal according to the content file transfer request message. Since a detailed description of how the terminal transmits a content file to the user terminal has been described with reference to FIG. 12, a description thereof will be omitted.

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

1 is a view showing a content file providing system by a P2P method according to the present invention.

2 is a block diagram schematically showing the configuration of the balancing server shown in FIG.

3 is a view showing a connection server information DB shown in FIG.

4 is a block diagram schematically showing the configuration of a command server according to the present invention;

FIG. 5 is a diagram showing a content file information DB shown in FIG. 4; FIG.

FIG. 6 is a diagram showing a connection list information DB shown in FIG. 4; FIG.

7 is a block diagram schematically illustrating a configuration of a user terminal receiving a content file from at least one terminal through P2P according to the present invention.

8 is a block diagram showing in detail the configuration of the file format conversion unit shown in FIG.

9 illustrates a format of a DRM file according to the present invention.

10 illustrates a format of a stream file according to the present invention.

11 is a flowchart illustrating a method for downloading a content file by a user terminal using a P2P scheme according to an embodiment of the present invention.

12 is a flowchart illustrating a method of transmitting a content file to a user terminal by a content file holding terminal using P2P according to the present invention.

13 is a flowchart illustrating a method in which a user terminal receives a content file from at least one content file holding terminal according to an exemplary embodiment of the present invention.

14 is a flowchart illustrating a method of downloading a content file by a user terminal using a P2P scheme according to another exemplary embodiment of the present invention.

15 is a diagram showing a content file transmission system using a P2P scheme according to another preferred embodiment of the present invention.

16 is a block diagram schematically showing a configuration of a balancing server according to another preferred embodiment of the present invention.

17 is a flow chart illustrating a method for a balancing server to transmit content file information requested by a user according to another embodiment of the present invention.

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

100, 1400: balancing server 110: connection server

120, 1410: user terminal 130: command server

200, 400, 1500: Service Management Department

210, 1510: authentication unit 220: connection server selection unit

410, 1520: Content file search unit 420, 1530: File allocation unit

230, 430, 650, 1540: communication unit 240, 440, 1550: database

600: user interface unit 610: control unit

620: File division management unit 630: File format conversion unit

640: playback unit 660: content database

632: Extraction unit 634: Decoding unit

636: DRM / stream format converter 638: file converter

Claims (28)

In a system in which a user terminal is provided with a content file in a P2P manner from at least one content file holding terminal, A balancing server that searches for a database provided to select a connection server to which the user terminal connects, and transmits information of the connection server to the user terminal when the user terminal requests a connection; When the content file request message is received from the connection server, the provided database is searched to extract at least one content file holding terminal, the file allocation amount of each extracted content file holding terminal is determined, and the at least one content file holding terminal is held. A command server for transmitting a content file request response message including file quota information for each terminal to the connection server; When the content file request response message is received from the command server, at least one connection server for transmitting a content file transfer request message including file quota information to each content file holding terminal, Each content file holding terminal extracts a content file corresponding to file quota information of a content file transmission request message received from the connection server and transmits the content file to the user terminal in a P2P manner, and the user terminal is transmitted from the balancing server. The content file providing system according to the P2P method, characterized by accessing the corresponding connection server according to the information of the connection server, transmitting a content file request message, and sequentially storing the content files divided and transmitted from each content file holding terminal. . The method of claim 1, And the content file request message transmits a content file request message including content file information, user ID, and connection server information input / selected by a user to the connection server. The method of claim 2, And the content file information includes at least one of a file name, a playing time, a frame number, a content classification, and a keyword. The method of claim 1, The content file holding terminal is a content file providing system using a P2P method, characterized in that at least one of a wired terminal, a mobile terminal. The method of claim 1, The balancing server, A database including at least one of a connection server information database and a user information database; An authentication unit for determining whether the user terminal is an authenticated user by using information registered in the user information database when the user terminal requests access; In the case of the user authenticated as a result of the authentication unit, the P2P method includes a connection server selecting unit which searches the connection server information database to determine the state of each connection server and then selects a connection server to be connected to the user terminal. Content file providing system by the. The method of claim 5, The connection server information database is registered with at least one connection server information connected to the balancing server, the content file by the P2P method characterized in that it comprises at least one of the IP, the number of threads, the memory utilization rate, CPU speed of each connection server Provide system. The method of claim 5, The connection server selecting unit selects and selects a connection server having a low load by using at least one of a usage rate, a memory amount, and a CPU usage rate registered in the connection server information database. . The method of claim 1, The command server, A database including at least one of a content file information database and a connection list information database; When a content file request message is received from the user terminal or / and the connection server, the content file information database is searched to extract a user ID holding the corresponding content file, and the extracted list is searched by searching the connection list information database. A content file searcher for extracting a content file holding terminal in the connected state from the ID; and And a file allocator configured to determine the priority of the content file holding terminals extracted by the content file retrieval unit and determine a file allocation amount for each holding terminal. The method of claim 8, The content file information database includes a section for distinguishing between music and a video, a title, a maker, a content, a path of a connection file, a file name, a play time, a frame number, a content classification, a user ID, a download count, a keyword, and access information. Content file providing system according to the P2P method characterized in that it comprises at least one of the price, the last access time. The method of claim 8, The connection list information database includes at least one of a user ID, a mac address, a CPU speed, a network speed, an IP, an authentication status, and access information. The connection list information database is connected to a corresponding connection server whenever the list of terminals connected to each connection server is updated. Content file providing system by a P2P method, characterized in that for updating. The method of claim 8, The content file search unit searches the connection file information database to extract content file information corresponding to the search word of the content file request message, and has a user ID having a content file that matches a play time and a frame number among the extracted content file information. Content file providing system by a P2P method, characterized in that for extracting. The method of claim 8, The file allocator determines the priority of the extracted content file holding terminals using the CPU speed and / or the network speed registered in the connection list information database, and the file allocation amount to be transmitted for each holding terminal using the determined priority. Content file providing system by a P2P method, characterized in that for determining. The method of claim 8, The file allocator determines the priority of the content file holding terminals by using the number of content file downloads of the content file holding terminals extracted by the content file searching unit, and determines a transmission file allocation amount according to the determined priority. Content file providing system by a P2P method. The method of claim 1, And the file quota information is classified by time stamp or frame number. The method of claim 1, And the user terminal determines the order of each content file by using the time stamp or frame number of the content file divided and transmitted from each content file holding terminal and stores the order of each content file in order. In the user terminal to receive and play the content file in a P2P method from a plurality of content file holding terminal, A content database storing content files; A user interface unit for receiving a user command; A search word analyzing unit configured to analyze a search word input through the user interface unit, extract a meaningful search word, and generate a content file request message including the extracted meaningful search word; A file division management unit for arranging content files that are divided and transmitted from the plurality of content file holding terminals in order using time stamps or frame numbers; A file format conversion unit for converting a content file transmitted from the file division management unit into a DRM file or a DRM file into a stream file; A playback unit for playing the content file when a play command of the content file is input through the user interface unit; and Communication unit for communication with the content file holding terminal User terminal for receiving and playing the content file in a P2P method characterized in that it comprises a. The method of claim 16, The content file divided from the content file holding terminal and transmitted is a stream file including a time stamp and / or a frame number, data classification, original author ID, data size, and data. User terminal. The method of claim 16, The DRM file may include a file header, a time stamp, a media type, a frame data size including at least one of an original author ID, an original author name, a user ID, a user name, a copyright type, a total play time, a total number of frames, and a multimedia data start position. And a frame header including at least one of data offsets, and data of video and audio. The method of claim 16, When the DRM file is converted into a stream file, the file format conversion unit decodes the corresponding DRM file, divides the decoded DRM file based on a time stamp, and converts the content file into a stream file. User terminal to receive and play. In a system comprising a balancing server, at least one connection server connected to the balancing server, and a command server connected to the connection server, the user terminal receives a content file in a P2P manner from at least one content file holding terminal, (a) when the user terminal requests access from the balancing server, selecting a connection server to which the user terminal connects, and transmitting the selected connection server information to the user terminal; (b) When the user terminal is connected to the connection server, when a content file request message including a search word is received from the user terminal by providing a content file search screen to the user terminal, the content file request message is sent to the command server. Transmitting; (c) when a content file request message is received from the command server, searches for a content file holding terminal that holds the corresponding content file, sets a file allocation amount according to the priority of the found content file holding terminal, and at least one content file. Transmitting a content file request response message including a holding terminal and file allocation information for each holding terminal to the connection server; (d) transmitting, by the connection server, a content file transfer request message including corresponding file quota information to each content file holding terminal according to the content file request response message; (e) P2P-connecting the content file holding terminal to the user terminal to extract a content file corresponding to the file quota information and to transmit the content file to the user terminal; and (f) storing, by the user terminal, the content file divided and transmitted from each content file holding terminal in order by using a time stamp; Content file providing method according to the P2P method characterized in that it comprises a. The method of claim 20, In step (a), If the user terminal requests access, performing user authentication; If the user terminal is an authenticated user, selecting a connection server to which the user terminal is to connect and transmitting connection server information to access the user terminal; and And connecting the connection server with the connection server corresponding to the connection server information transmitted from the balancing server in the user terminal. The method of claim 20, In step (b), When the user terminal is connected from the connection server, transmitting connection information of the connection of the user terminal to the command server to update connection list information of the command server, and providing a content file search screen to the user terminal. ; When a search word is input through the content file search screen at the user terminal, the search term is analyzed to extract a meaningful search term, and a content file request message including the extracted meaningful search term is generated and transmitted to the connection server. Step; and And transmitting the content file request message to the command server in the connection server. The method of claim 22, And the connection information includes at least one of a user ID, a mac address, a CPU speed, a network speed, an IP, a public authentication, and access information. The method of claim 20, Step (c) is, Searching for and extracting a database including content file information corresponding to a search word included in the content file request message when the content file request message is received from the user terminal; Searching for a content file holding terminal connected to a network among terminals having the extracted content file information; Determining a file quota by determining a priority for each searched content file holding terminal; and And transmitting a content file request response message including the content file holding terminal and file quota information for each holding terminal, to the connection server. The method of claim 20, Determining a file allocation amount according to the priority of the retrieved content file holding terminal includes the CPU speed and / or network speed of the retrieved content file holding terminals, the number of open sockets, the number of downloads of the corresponding content file, the bandwidth or proximity to the user terminal. A priority file is determined using at least one and a file allocation amount is determined using the determined priority. The method of claim 20, In step (e), P2P connection with the user terminal and extracting a corresponding content file according to the content file transfer request message; Converting the extracted content file into a stream file using a time stamp, and then transmitting a stream file corresponding to the file quota information to the user terminal. . The method of claim 20, Step (f), When the stream file is received from each content file holding terminal, storing the stream file in order using a time stamp; Determining whether the stored stream file is normal when reception of a stream file from each content file holding terminal is completed; and And if the stream file is normal, converting the stream file into a DRM file and storing the converted file. 2. The method of claim 27, And if the stream file is not normal, checking and restoring an area which is not normal, as a result of the determination.
KR1020070110376A 2007-10-31 2007-10-31 System and method for providing contents file using of peer-to-peer KR20090044320A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210029914A (en) * 2019-09-09 2021-03-17 주식회사 엘지유플러스 Method and server of updating block in blockchain for content

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210029914A (en) * 2019-09-09 2021-03-17 주식회사 엘지유플러스 Method and server of updating block in blockchain for content

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