KR20050002560A - A system and a method for providing multimedia contents through P2P network - Google Patents

Abstract

PURPOSE: A system and a method for offering multimedia contents to multiple users at a high-speed based on the P2P(Peer-to-Peer) are provided to efficiently receive the high quality contents by resolving a system load/network bandwidth problem for a multimedia data server on an existing server-client system and an asymmetry problem of an up/download network speed on the P2P network system. CONSTITUTION: A user certification module(102) performs certification by discriminating that a user has an authority for using the contents. A user system information operating module(104) stores/operates ID information and contents download history information of the user system. In case that a contents transfer request is received from the user system, the user information operating module searches other user system having a part of the requested contents and provides the ID information of the searched user system. A user side module operating module(106) controls installation of a user side module installed/executed on the user system. A contents transfer module(108) stores the contents and transfers all or partial contents to the requesting user system.

Description

P2P based multimedia contents providing system and method thereof {A system and a method for providing multimedia contents through P2P network}

The present invention relates to a multimedia content providing system for providing a large amount of multimedia content to a plurality of users at high speed, and a method thereof. In particular, the present invention provides multimedia content to a plurality of users at high speed using a P2P network. A system and method thereof are provided.

Recently, as the limitations of computer technology and communication technology are gradually overcome, analog content, which has been transmitted through conventional airwaves or wired cables, has been transmitted digitally through a high-speed Internet network. Also in the early days of low-quality small-capacity data is gradually becoming a high-quality large-capacity.

Multimedia content containing such video and / or audio data (hereinafter also referred to as "multimedia data") generally increases in data volume as the quality and / or sound quality improves, and such a large amount of data In order to enable users to use smoothly, there is a need for a method that can transfer large amounts of data at high speed.

Here, the configuration of a conventional multimedia content providing system will be described with reference to the drawings.

As shown in FIG. 1A, the server / client method, which is one of the methods used by the conventional multimedia content providing system, is a one-to-one communication (or 1: 1 file transfer) method with a data server. It's used a lot in.

According to the conventional server / client concept of multimedia content providing system, when a large number of clients connect to the content providing server (data server) for downloading the content, the processing capacity of the system is insufficient or the bandwidth of the network is insufficient. There is a problem such as that, the user who uses the service will have a problem receiving smooth service.

As a solution to this problem, alternatives such as limiting the number of users available at the same time, increasing the processing capacity of the content providing server, or extending the bandwidth of the network have been proposed. Beyond this will have a problem that leads to technical limitations.

In order to solve the above problems, a new proposal is a network access method called P2P (Peer to Peer) service. In other words, it is a way to solve the problem of the conventional server-client structure by directly connecting the individual computer and the computer to share files without a server. As the English word peer means a friend or colleague, it is a service that allows users to directly access other users' computers through the Internet and share various information and files.

Existing web search was able to search only the information recorded on the web site or use only the data registered on the web site. However, according to the above P2P method, the web site as well as the database owned by the individual or company is comprehensive. Not only can you search, but you can also transfer the information directly to your computer. This P2P service has emerged as a service that enables individuals to share multimedia data such as music files (MP3) owned by individuals through the Internet, and then a service that can share all files owned by individuals. And so on.

Referring to FIG. 1B, FIG. 1B is a block diagram of a conventional P2P scheme network. As shown in FIG. 1, file transfer is performed by 1: 1 communication between users A, B, or C using a P2P network. Compared to the case where the multimedia content is downloaded from one server computer, the load of the server computer and the problem of network bandwidth may be largely solved.

However, according to the conventional P2P service, there is a problem that multimedia files transmitted to each user may remain in the user's computer system, which may make copyright protection of the multimedia content difficult. In addition, since the P2P method is a communication method between user computers, there is a problem that a problem may occur in speed and / or stability of data transmission.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a system and method for providing multimedia contents based on P2P network which can transmit high quality multimedia contents to a plurality of users at high speed.

Another object of the present invention is to provide a P2P network-based multimedia content providing system and method for allowing a specific computer system connected to a P2P network to be utilized as a data relay server.

In addition, another object of the present invention is to connect a computer between users in a remote place to a P2P network P2P network that allows a specific individual to create, operate and manage their own multimedia content, and to provide a large number of users at high speed The present invention provides a multimedia content providing system and method thereof.

1A is a typical server-client system configuration diagram.

1B is a block diagram of a conventional P2P scheme network.

2 is a block diagram conceptually illustrating an example in which a system for providing a multimedia content based on a P2P network according to an embodiment of the present invention is used;

3 is a conceptual block diagram illustrating a schematic configuration of a multimedia content providing system 100 according to an embodiment of the present invention.

4 is a block diagram conceptually illustrating a configuration of a user side module 120 installed in a user system.

5A and 5B are flowcharts illustrating a method of providing multimedia content according to an embodiment of the present invention.

FIG. 6 is a schematic diagram illustrating a process of determining a priority when the system determination unit 124 receives content from a plurality of user systems. FIG.

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

10.1, 10.2, 10.3, and 10.4: user system

100: multimedia content providing system 102: user authentication module

104: user system information operation module 106: user side module operation module

108: content delivery module 120: user side module

122: transmission rate inspection unit 124: transmission system determination unit

126: content holding amount checking unit 128: content transfer status checking unit

130: content data relocation unit 132: content playback unit

140: hardware 142: software

144: User System Information Database 146: Content Database

In order to achieve the above object, the present invention is connected to a plurality of user systems and a wired and wireless network to provide a multimedia content to a plurality of users at high speed in a multimedia content providing system, from any one of the plurality of user systems A user authentication module for determining and authenticating whether or not a user of the requesting user system has a right to use content when a request for content transmission is made; Storing and operating identification information of the user system and information on a history of receiving the content by the user system, and retaining at least a part of the requested content when a request for transmission of the content is received from the user system; A user system information operation module for searching for another user system and providing identification information of the searched user system; A user side module operating module for controlling installation of a user side module installed and executed in the user system; And a content transmission module that stores the content and transmits all or part of the content to a user system that has requested the transmission of the content, wherein the user-side module transmits all or part of the requested content according to a predetermined criterion. A multimedia content providing system comprising a transmission system determining unit for determining a content transmission source to be received.

According to another aspect of the present invention, the present invention provides a method for providing a multimedia content in a multimedia content providing system connected to a plurality of user systems and a wired or wireless network, the content transmission from any one user system of the plurality of user systems If there is a request, determining and authenticating whether a user of the requesting user system has a right to use content; Searching for another user system having at least a portion of the same content as the requested content and providing identification information of the retrieved user system; Determining a content sender to transmit the requested content to the user system that requested the content according to a predetermined criterion; And transmitting all or part of the contents held by the determined transmission source to the user system that has requested the transmission of the contents.

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

First, referring to FIG. 2, FIG. 2 is a block diagram conceptually illustrating an example of using a P2P network-based multimedia content providing system according to an embodiment of the present invention. A plurality of user systems 10.1, 10.2, 10.3, and 10.4 are connected to each other and each of the user systems 10.1, 10.2, 10.3, and 10.4 and the multimedia content providing system 100 are connected by wired or wireless network (not shown, hereinafter referred to as "network"). . In FIG. 2, four user systems 10.1, 10.2, 10.3, and 10.4 are illustrated, but this is for convenience of description only, and the number of user systems is not limited thereto. The user systems 10.1, 10.2, 10.3 and 10.4 connected to the network are preferably computer systems capable of transmitting and receiving data according to a predetermined communication protocol.

As long as the user can connect to the network and can transmit and receive data to and from the system 100 according to a predetermined communication protocol, the user can use any one as his user system. For example, a user may use a personal computer (not shown) capable of connecting to a wired network, a personal portable terminal (not shown) capable of connecting to a wireless network, or the like to obtain multimedia content desired by the system 100 of the present invention. You can request to supply.

The network is preferably an internet communication network, but may also be another known communication network. Depending on the type of network, the manner of connecting to it and the communication protocol suitable for the network may vary, but the details thereof are not only widely known in the technical field of the present invention, but also simple for carrying out the technical idea of the present invention. As the design matter does not constitute the main part thereof, the description thereof will be omitted.

Hereinafter, the multimedia content providing system 100 according to an embodiment of the present invention will be described in more detail with reference to FIG. 3. 3 is a conceptual block diagram illustrating a schematic configuration of a multimedia content providing system 100 according to an embodiment of the present invention.

As shown in FIG. 3, the system 100 of the present invention may use predetermined content when a user requests content transmission from any one of a plurality of user systems 10.1, 10.2, 10.3, and 10.4. Storing and operating the user authentication module 102 for performing authentication in the case of affirmative authority and a history of using identification information and contents of the user systems 10.1, 10.2, 10.3, and 10.4. A user system information operation module 104 which searches for at least a part of the same content from another user system that is first transmitted and provides identification information of the searched user system, and a user side module installed and executed in user systems 10.1, 10.2, 10.3, and 10.4. A user-side module operating module 106 for installing and controlling 120, and the content Copy and, if certain conditions are satisfied, including a content delivery module 108 to transfer all or a portion of the requested content, transferring the content to the requesting user system.

In addition, the system 100 of the present invention includes a content database 146 for efficiently storing and operating a plurality of multimedia contents, identification information (for example, IP address, etc.) of user systems 10.1, 10.2, 10.3, and 10.4, user system 10.1, 10.2, 10.3, and 10.4 may further include a user system information database 144 for efficiently storing and operating information about a history of using content from the system 100.

Further, the system 100 may include various hardware 140 included in the conventional computer system and various software 142 executed using the same, and perform a function performed by the conventional computer system. Accordingly, the system 100 of the present invention may be implemented as a wired or wireless web server that can be connected through a wired or wireless internet, and in this case, the software 142 may include a plurality of web pages. It should be noted that each of the modules may be implemented as a component of the web page.

Details regarding the databases 144 and 146, hardware 140 and software 142 are already well known in the art and will be omitted.

Hereinafter, each module will be described in more detail. In the present embodiment, a case where the system 100 is implemented as a web server will be described as an example. However, it is obvious that the system 100 of the present invention is not limited thereto.

First, when there is a request for content transmission from any one of the plurality of user systems 10.1, 10.2, 10.3, and 10.4, the user authentication module 102 determines whether the user of the user system has the right to use the content. And authenticate it. For example, the user authentication module 204 performs member authentication that uniquely identifies a currently connected user using information about the user such as a user identifier (ID) and a password. If the currently connected user is not yet registered as a member, the user may be allowed to join as a member or may be identified as one of the visitors.

The user authentication module 204 may further include a user information database (not shown) for efficiently storing and operating information about a user such as a user identifier (ID) and a password. Furthermore, the user authentication module 102 requests information about a protocol version from the user systems 10.1, 10.2, 10.3, and 10.4, and updates the protocol versions of the user systems 10.1, 10.2, 10.3, and 10.4 if they do not match. May be performed.

Next, the user system information operation module 104 receives identification information (eg, an IP address) of each of the user systems 10.1, 10.2, 10.3, and 10.4, and each user system 10.1, 10.2, 10.3, and 10.4 receives specific content. Or store information about the history used. In addition, when the user system information operation module 104 is requested to transmit content from any one of a plurality of user systems 10.1, 10.2, 10.3, and 10.4, the user system information operation module 104 holds at least a part of the requested content. It determines whether another user system exists and, if present, identifies the user system's identification information to the user system that requested the content.

For example, when the user system information operation module 104 receives a request for using specific content from the user system 10.4, the user system 10.4 of the other user system 10.1, 10.2, or 10.3 may be used. It is determined whether there is a user system that receives and retains at least a portion first. In this case, it is preferable to perform a search using the user system information database 144. In particular, it is preferable that the user system information operation module 104 keeps track of which system the user system has recently requested.

Thus, if another user system holding at least a portion of the requested content has been retrieved and identified and the reverse order of when to use the content is found to be in the order of user systems 10.1, 10.2, and 10.3, then user systems 10.1, 10.2, and 10.3 Sends the IP address to the user system 10.4 that requested the content.

Meanwhile, when a user system 10.1, 10.2, 10.3, or 10.4 completes the reception of content from the system 100, the user system information operation module 104 receives a user ID from the user system 10.1, 10.2, 10.3, or 10.4. It is desirable to receive information such as a data block map of the content.

Next, the user side module operation module 106 installs and operates the user side module 120 (to be described in detail later) installed and executed in the user systems 10.1, 10.2, 10.3, and 10.4. That is, the user side module operation module 106 checks whether the user side module 120 is installed in the user systems 10.1, 10.2, 10.3, and 10.4, and installs the user side module 120 if it is not installed. The check can be easily performed by sending a query that can only be returned from the user systems 10.1, 10.2, 10.3 and 10.4.

Next, when a predetermined condition is satisfied, the content transmission module 108 transmits all or part of the requested content to the user system 10.1, 10.2, 10.3, or 10.4, which requested the transmission of the specific content. The content transmission module 108 determines whether to transmit the content to the user system requesting the content, or to transmit all or only a part of the content, by interacting with the user-side module 120. This will be described in detail with reference to the user module 120 below.

Referring to FIG. 4, FIG. 4 is a block diagram conceptually illustrating a configuration of a user module 120 installed in a user system. As shown in Fig. 4, according to an embodiment of the present invention, the user-side module 120 determines, from a predetermined user system, which user system to request to transfer all or part of the content according to a predetermined criterion. 124;

The user-side module 120 further includes a transmission rate checking unit 122 for checking a transmission speed of a network between a user system that requested the content and another user system having at least a portion of the requested content, and at least part of the content. The content holding amount checking unit 126 which checks the holding amount of the corresponding content of the other user system holding the &lt; Desc / Clms Page number 11 &gt; The apparatus may further include a content delivery status checking unit 128 for selecting a user system that is greater than or equal to a number.

Furthermore, the user side module 120 may further include a content data relocation unit 130 for relocating the pieces of data of the received content to be suitable for reproduction, and a content reproducing unit 132 for reproducing the relocated content according to its content type. The user side module 120 is installed and executed in each user system 10.1, 10.2, 10.3, and 10.4 by the user side module operation module 106 as described above.

Hereinafter, each unit of the user module 120 will be described in detail. First, the transmission rate checking unit 122 uses the identification information of the other user system received from the user system information operation module 104, and the other user system that has received the content or has the content for other reasons first. Check the data transfer rate over the network between the user systems. In order to check the data transmission rate, the transmission rate checking unit 122 may measure, for example, the time until a reply of receiving a predetermined amount of data packet to the other user system and receiving it. By doing this, the transmission speed of the network through which the current data is transmitted and received is examined, and it is determined whether the checked transmission speed is above or below a predetermined reference speed.

Next, the content possession amount checking unit 126 uses the identification information of the other user system received from the user system information operation module 104 to hold the amount of content (eg, content) stored in another user system that has received the content first. Check the retention of file blocks, etc.).

Next, the transmission system determining unit 124 determines a user system to receive the content, based on the transmission rate checked by the transmission rate checking unit 122 and / or the transmission amount of the content checked by the content holding amount checking unit 126. . At this time, it may be determined that the content can be received from a plurality of user systems, and in this case, it is desirable to determine their priority.

A specific example in which the transmission system determination unit 124 determines a user system (that is, a content transmission source) to receive content will be described in three cases as follows.

First, when the transmission speed of the intervening network is more than the reference number of other user systems, the user systems up to the reference number from the user system connected to the network having the highest transmission speed are determined as content transmission sources. do. Here, the reference number is the minimum number of user systems required for smooth multiplexing.

Second, when the transmission speed of the intervening network is one or more other user systems with a predetermined reference speed or more, but less than the reference number, the entire user systems and the system 100 having a transmission speed greater than or equal to the predetermined reference speed are determined as content transmission sources. do.

Third, if there is no other user system whose transmission rate is higher than the predetermined rate, the system 100 determines to receive the requested content.

The transmission system determination unit 124, when the transmission source to receive the content is determined as described above, determines the priority among the content transmission sources. For example, when receiving the requested content from a plurality of different user systems, the delivery system determination unit 124 assigns a higher priority as the transmission speed of the network increases. In addition, when a system having a relatively high transmission speed is higher than or equal to the reference number, other systems except for a reference number of user systems as those connected to a network having a high transmission speed may be designated as spare systems.

Further, the delivery system determination unit 124 determines that, when receiving the requested content from the plurality of other user systems, the content holding amount inspected by the content holding amount checking unit 126 receives a relatively large amount of content from a system having a relatively large amount of content. It may be.

Next, when the content transmission state checking unit 128 receives the content from a plurality of different user systems, the content transmission state checking unit 128 checks the state in which the content is transmitted, and selects the user system whose error rate is equal to or greater than a predetermined value. In some embodiments, the user systems thus screened may be removed from the transmission source.

An example of the operation of the transmission system determination unit 124 as described above will be described in more detail with reference to FIG. 6. FIG. 6 is a schematic diagram illustrating a process of determining priority when the transmission system determination unit 124 receives content from a plurality of user systems.

In the example shown in FIG. 6, the user system 10.1 requests the content, and the user system that already holds the content is the user systems 10.2 to 10.6. The transmission system determination unit 124 of the user system 10.1 is a user system 10.2 (peer B), 10.4 (peer D) whose transmission speed is equal to or higher than a predetermined speed, based on a result of a test of the network transmission speed with the user systems 10.2 to 10.6. Determine 10.5 (Peer E) as the content sender (i.e. the user system that will receive the content).

In this example, it is assumed that three or more user systems having a transmission rate of more than a predetermined rate are sufficient. That is, in this case, the entire contents can be transmitted only by the user systems.

On the other hand, the transmission system determination unit 124 of the user system 10.1 designates the user system 10.3 and the user system 10.6 as spare systems. In addition, the transmission system determination unit 124 of the user system 10.1 determines priority in order of user systems 10.2, 10.4, and 10.5 according to the transmission speed and the amount of content transmission, and as shown in FIG. To receive the content in a manner that is received from the sender of the).

On the other hand, the content delivery status inspection unit 128 of the user system 10.1 checks the state in which the content is transmitted, and selects a system having an error rate equal to or greater than a predetermined value. According to this example, an error occurs in the system 10.4. The transmission system determining unit 124 stops the transmission from the user system 10.4, and determines to receive the transmission from the user system 10.6, which is a spare system.

As described above, according to the present invention, since the content can be transmitted from a plurality of peers, the load of the system 100, that is, the system serving as the content server, is reduced. In addition, the user module 120 of the user system allows periodic updates to be performed using the idle time of other user systems, so that efficient data transmission can be performed without putting a load on the system 100. To contribute to other user systems.

Next, the content data redistribution unit 130 rearranges the pieces of the received content data so that the user system is suitable for playback, and the content reproducing unit 132 allows the user to relocate the content rearranged by the content data redeployment unit 130. Play content for viewing or listening.

The user module 120 as described above is a plug-in suitable for browsers of user systems 10.1, 10.2, 10.3, and 10.4 by using an ActiveX control, Java, or Java script. It may be implemented as a separate application program suitable for the user systems 10.1, 10.2, 10.3 and 10.4, or may be implemented in combination.

On the other hand, the system 100 of the present invention may provide a service for the content held through a plurality of channels, or may provide a service by providing a channel where the content is provided by an arbitrary user. Accordingly, the system 100 may further include a content providing channel operation module (not shown) that generates, registers, and operates the plurality of channels and user channels. In addition, the system 100 of the present invention may be connected to another content provider (not shown) and the like to transmit data related to broadcasting and advertisement.

In addition, the system 100 of the present invention may further include a module (not shown) for performing functions such as a chat / message server, a mail server, an advertisement server, a digital rights management (DRM) management server, and a payment server.

Therefore, each user system can be a member-to-member communication through the chat / message server, the service provider may advertise the company through the ad server. In addition, the member can purchase the requested content through the payment server. Since the technology for implementing the various services described above is a technology that can be fully implemented by those skilled in the art to which the present invention belongs, a detailed description thereof will be omitted.

Hereinafter, a method of providing multimedia content according to an embodiment of the present invention will be described with reference to FIGS. 5A, 5B, and 5C. 5A and 5B are flowcharts illustrating a method of providing multimedia content according to an embodiment of the present invention.

First, referring to FIG. 5A, when there is a request for content from one of a plurality of user systems 10.1, 10.2, 10.3, and 10.4 (see FIG. 2) to the system 100 (see FIG. 2) (step S400), the request is made. It is authenticated whether the user of this user system has the right to use the content (step S402). In this case, a database in which information about a user such as a user identifier (ID) and a password is stored may be used, and membership authentication for uniquely identifying a currently connected user is performed.

Next, if it is determined that the user who requested the content is a user having a right, the user module 120 is checked whether the user side module 120 is installed in the user system where the request was made (step S404). It installs (step S406). As a result of the determination in step S404, if the user side module 120 already exists or its installation is completed, the user is allowed to select the desired content (step S408).

Next, it is searched whether there is another user system holding at least a part of the requested content, and if present, identification information of the other user system (for example, an IP address, etc.) is transmitted to the requested user system (step S410).

Referring now to FIG. 5B, by means of the installed user-side module 120, the identification information of the user system received from the system 100 is used to identify the network between the user system that has requested the content and another user system that has received the first transmission. The data transfer rate is checked (step S412). In addition, it is first checked how much the desired content is transmitted to the other user system which received the transmission (step S414).

Next, it is determined from which system the content is to be transmitted, and which system preferentially receives the transmission based on the checked transmission speed and content delivery amount of the network (step S416).

Referring to Fig. 5C, step S416 will be described in more detail. FIG. 5C is a detailed flowchart of step S416 shown in FIG. 5B. As illustrated in FIG. 5C, when another user system having a transmission speed of the network is equal to or greater than a predetermined reference speed, content is transferred from the user system corresponding to the reference number among user systems having a relatively high transmission speed. Determine to receive.

On the other hand, if the transmission rate of the network is at least one number of other user systems more than a predetermined rate but less than the reference number, it is determined to receive the requested content from at least one or more user systems and system 100 having a transmission rate of more than a predetermined rate.

If there is no other user system whose transmission speed is higher than the predetermined speed, the system 100 determines to receive the requested content.

Subsequently, when a system to receive the content is determined, the priority of the system is determined. That is, when the requested content is transmitted from a plurality of different user systems, the system determines to receive the content by giving priority to a system having a relatively high transmission speed of the inspected network. It is also possible to designate a low transmission system as a spare system. In addition, it is determined to receive a relatively large amount of content from a system having a relatively large amount of inspected contents.

In the manner as described above, the content is transmitted from the system 100 to the system that requested the content (step S418). On the other hand, according to the present invention, while receiving content from a plurality of different user systems, the state in which the content is transmitted is checked to select a system having an error rate equal to or more than a predetermined value. If a system with a high error rate is found, transmission is stopped from the system, and transmission is started from a preliminary reserved system (step S420).

Next, when the transmission of the content is completed, the completion information (eg, user ID, block map in which the content is stored) is transmitted to the system 100 (step S422). Next, the pieces of content data received from the plurality of sources are rearranged to be suitable for playing in the user system (step S424), and by playing back the rearranged content (step S426), the user watches / or listens to the content.

As described above, the system and method of the present invention searches for a plurality of peers with an optimal path search algorithm for data server setting, divides the capacity of data to be downloaded according to the network status of the data server, and simultaneously transmits the data from a predetermined number of peers. This reduces the load on the data server and enables efficient transmission.

The present invention has been described above through the preferred embodiments, but the present invention is not limited thereto, and various modifications can be made by those skilled in the art within the technical scope of the claims.

According to the present invention, it is possible to solve the system load and network bandwidth problem for the multimedia data server appearing in the existing server-client system, and the asymmetry problem of upload and / or download speed on the network which may occur in the general P2P network system. It is possible to efficiently provide high quality content by solving the problem caused by the problem and the limitation of the data transmission rate by one-to-one communication.

In addition, according to the present invention, by periodically updating the information on the content transmission of the user system using the idle time of the user system, it is possible to optimize the network environment for multimedia data reception.

Furthermore, according to the present invention, in order to reduce the system load of the P2P multimedia content system participant, the user allocates only a small amount of system resources while performing other tasks using his system, The degree of participation can be controlled through configuration, either automatically or manually, to allocate an amount of system resources.

Claims (18)

In the multimedia content providing system that is connected to a plurality of user systems and a wired or wireless network to provide multimedia content to a plurality of users at high speed, A user authentication module for determining and authenticating whether a user of the requesting user system has a right to use content when a request for content transmission is made from any one of the plurality of user systems; Storing and operating identification information of the user system and information on a history of receiving the content by the user system, and retaining at least a part of the requested content when a request for transmission of the content is received from the user system; A user system information operation module for searching for another user system and providing identification information of the searched user system; A user side module operating module for controlling installation of a user side module installed and executed in the user system; And A content delivery module for storing the content and transmitting all or part of the content to a user system that has requested the transmission of the content, The user-side module includes a transmission system determining unit that determines a content transmission source to receive all or part of the requested content according to predetermined criteria. The method of claim 1, The user module, A transmission speed for checking a transmission speed of a network between the user system requesting the content and another user system having at least a part of the requested content by using identification information of another user system provided from the user system information operation module. Further comprising an inspection unit, And the transmission system determination unit includes a transmission system determination unit that determines a content transmission source to receive all or a part of the requested content according to the transmission rate inspection result of the transmission rate inspection unit. The method of claim 2, The transmission system determination unit, If the number of the other user systems whose transmission speed of the checked network is equal to or greater than a predetermined speed is greater than or equal to a predetermined reference number, all or the requested content from the user systems as many as the reference number among user systems whose transmission speed is relatively high or Multimedia content providing system that determines to receive some. The method of claim 2, The transmission system determination unit, The requested content from the at least one or more user systems and the multimedia content providing system, wherein the transmission speed is equal to or greater than a predetermined speed when the number of the other user systems whose transmission speed of the network is greater than or equal to a predetermined speed is less than a predetermined reference number. Multimedia content providing system for determining to receive all or part of. The method of claim 2, The transmission system determination unit, And if there is no other user system whose transmission speed of the checked network is greater than or equal to a predetermined speed, determining to receive all or part of the requested content from the multimedia content providing system. The method of claim 2, The transmission system determination unit, And when the requested content is transmitted from a plurality of different user systems, determining to receive the content by giving priority to a system having a relatively high transmission speed of the inspected network. The method of claim 1, The user side module, And a content holding amount checking unit for checking a holding amount held by another user system that has received at least a portion of the same content first, And the delivery system determining unit, when receiving the requested content from a plurality of other user systems, determines to receive a relatively large amount of content from a system having a relatively large amount of inspected content transmission. The method of claim 1, The user side module, When receiving the requested content from a plurality of the other user system, the content delivery status inspection unit for checking the state in which the content is transmitted, and selects a system having an error rate more than a predetermined value, further comprising: The transmission system determination unit, Designate at least one other user system having a relatively low transmission rate of the checked network as a spare system, and if there is a system whose error rate is higher than a predetermined value, stop transmission from the system and receive the transmission from the spare system. Multimedia content providing system to determine. The method of claim 1, The user side module operation module, And checking whether the user side module is installed in the user system requesting the content, and if not installed, install the user side module in the user system. In the method for providing a multimedia content in a multimedia content providing system connected to a plurality of user systems and a wired or wireless network, When there is a request for content transmission from any one of the plurality of user systems, determining whether the user of the requesting user system has the right to use the content and authenticating the content; Searching for another user system having at least a portion of the same content as the requested content and providing identification information of the retrieved user system; Determining a content sender to transmit the requested content to the user system that requested the content according to a predetermined criterion; And And transmitting all or part of the contents held by the determined sender to the user system that has requested the transmission of the contents. The method of claim 10, Checking the transmission speed of the network between the user system requesting the content and another user system having at least a part of the same content by using the received identification information of the other user system; And And determining a content sender to transmit all or part of the requested content to the user system that requested the content according to a result of checking the transmission speed of the network. The method of claim 11, Determining the system to receive the transmission, If the number of the other user systems whose transmission speed of the checked network is greater than or equal to a predetermined speed is greater than or equal to a predetermined reference number, the multimedia content determined as the content sender of the user systems as many as the reference number among the user systems whose transmission speed is relatively high. How to Provide. The method of claim 11, Determining the system to receive the transmission, If the number of transmissions of the checked network is one or more other than the predetermined speed but less than a predetermined reference number, at least one user system and the multimedia content providing system requesting the content from the transmission speed is a predetermined speed or more. Multimedia content providing method for determining to receive all or part of the content requested by the user system. The method of claim 11, Determining the system to receive the transmission, And if the other user system whose transmission speed of the checked network is equal to or greater than a predetermined speed does not exist, determining to receive all or part of the requested content from the multimedia content providing system to the requesting user system. The method of claim 11, Determining the system to receive the transmission, And receiving the requested content from a plurality of different user systems to the user system requesting the content, and determining to receive the content preferentially by a system having a relatively high transmission speed of the inspected network. The method of claim 10, Checking, by the other user system having at least a portion of the same content, the amount of possession of the content; Determining the system to receive the transmission, And receiving the requested content from a plurality of different user systems to the user system requesting the content, and determining to receive a relatively large amount of content from a system having a relatively large amount of inspected content. The method of claim 10, When receiving the requested content from the plurality of different user systems to the user system requesting the content, inspecting a state in which the content is transmitted, and selecting a system having an error rate of a predetermined value or more, Determining the system to receive the transmission, Designate at least one other user system with a relatively low transmission rate of the checked network as a spare system, and if there is a system whose error rate is above a predetermined value, stop transmission from the system and stop transmission from the spare system. How to provide multimedia content to decide to receive. The method of claim 10, And checking whether a user side module for determining the system to receive is installed, and if not installed, installing the user side module in the user system.