KR20010109499A - Internet caching system and method - Google Patents

Abstract

According to the present invention, a main server, an intermediate server, and an end server are formed in a tree structure, and data newly registered in the main server is transmitted to the intermediate server and the end server through a communication network, and stored, respectively, and it is recognized that each data is the same. The present invention relates to an internet caching system and method for providing corresponding data in response to a user's request. The data can be updated using a minimum line bandwidth, and the data is transmitted during data transmission by optimizing a transmission path between the user and the data server. Loss can be prevented.

Description

Internet caching system and method {INTERNET CACHING SYSTEM AND METHOD}

The present invention relates to an internet caching system and method, and more particularly to an internet caching system and method that can minimize the load on the server by optimizing the access path of the user.

The fastest growing means of communication is the Internet, thanks to the development of communication networks. The number of such Internet users is increasing rapidly, and the amount of information exchanged through the Internet is also rapidly increasing.

Thus, the biggest problem facing the Internet is that it must cope with the increase in communication capacity.

Many users connect to the Internet using computers, set-top boxes, mobile communication terminals, etc., which eventually makes the system overloaded, making it difficult for users to access information on the Internet. In other words, insufficient bandwidth is an important issue.

In order to solve this problem, there have been two conventional solutions.

The first method is to increase bandwidth and switching capacity further. This method is still used today, but there is a costly problem.

The second way is to use caching techniques. Basically, caching means remembering Internet traffic and making duplicate copies of the World Wide Web files in a location closer to the user than the original file location.

For example, if the CNN homepage, which provides breaking news, is installed in only one location in the United States, problems can be caused by numerous connection requests from all over the world. Thus, by installing a copy of the CNN homepage in Europe, users in Europe can obtain the necessary information from a copy of the CNN homepage in Europe without accessing the CNN homepage in the United States. This reduces the number of users who access the CNN homepage located in the United States.

1 is a schematic system configuration diagram of a conventional caching system.

Referring to FIG. 1, the conventional caching system includes a main server 100, a plurality of end servers 110, and a user terminal 120.

A plurality of end servers 110 are directly connected to one main server 100 through a communication network. That is, when new data is stored in the main server 100, the main server 100 transmits the data to the plurality of end servers 110 through the communication network. The end server 110 stores the data received from the main server 100 and transmits the data to the terminal of the user who requests the data by accessing the end server 110.

That is, in the conventional caching system, one main server and a plurality of subordinate servers are combined, and the main server has a problem in that the main server needs to be constructed as a large capacity server to transmit and update updated information to all subordinate servers.

In addition, the conventional caching system requires a lot of line bandwidth in transmitting the updated data from the main server to a plurality of servers, there is a problem that the cost is expensive and the main server has a large load.

In addition, in the conventional caching system, when a user wants to download arbitrary data, the server provides the data from an arbitrary server storing the data or a server to which the user is connected. There was a problem missing.

Accordingly, an object of the present invention is to connect the lower server of the predetermined quantity to the main server, and sequentially connect the lower server of the predetermined quantity to each lower server, thereby quickly receiving and storing update data of the main server in the lower server. It is to provide an internet caching system and method.

Another object of the present invention is to provide an internet caching system and method capable of performing data caching in combination with a plurality of lower servers, even though the main server does not have expensive specifications.

It is still another object of the present invention to provide an internet caching system and method that can reduce circuit usage fee by using only a minimum line bandwidth in transmitting arbitrary data to another server.

It is yet another object of the present invention to provide an internet caching system and method that can maintain identity between data stored in an end server that provides arbitrary data to a user and updated data in a main server.

It is still another object of the present invention to provide an internet caching system and method that can prevent data loss even when transferring a large amount of data by optimizing a transmission path between a user and a data transmission server.

It is yet another object of the present invention to provide an internet caching system and method that can reduce line usage costs because each server requires only minimal bandwidth to transmit data.

1 is a schematic system diagram of a conventional caching system.

Figure 2 illustrates a schematic form of an internet caching system according to one preferred embodiment of the present invention.

Figure 3 is a schematic diagram of each server included in the Internet caching system according to an embodiment of the present invention.

4A is a data flow diagram illustrating an internet caching method in accordance with one preferred embodiment of the present invention.

4B is an illustration of a data model for internet caching in accordance with one preferred embodiment of the present invention.

5 is a flowchart showing a method of providing optimal media data according to an embodiment of the present invention.

6 is a flow chart showing a method of providing optimal media data according to another preferred embodiment of the present invention.

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

100, 200: main server

110, 250: end server

120: user terminal

210: first server

220: second server

230: third server

240: fourth server

250: end server

310: new data detection unit

320: control unit

330: storage unit

340: transceiver

360: error detection unit

In order to achieve the above objects, according to an aspect of the present invention, the end server can be directly coupled to the main server or the intermediate server through a communication network, the main server, the intermediate server, the end server is formed in a tree structure In the Internet caching system, a method in which the main server provides new data to at least one end server, wherein new first data is registered in the main server, and the first data is designated in advance through a communication network. A main server step of transmitting an intermediate server or an end server of the server and a predetermined number of intermediate servers, receiving the first data from the main server, storing the first data as second data, and storing the second data in a communication network. An intermediate server step of transmitting to a terminal server of a predetermined quantity through a first server; When the second data is received from an intermediate server, the first data or the second data is stored as third data, and there is a request for transmission of the third data from the main server to any user terminal. And a terminal server step of transmitting the third data to the user terminal through a communication network, and a system, apparatus, and recording medium for enabling the new data replication method to be performed. Is provided.

The intermediate server may further include receiving a request for transmitting the second data from the main server to an arbitrary user terminal, and transmitting the second data to the user terminal through a communication network. In the intermediate server step, at least one intermediate server may form a sequential joining relationship.

In addition, in an internet caching system in which a main server, an intermediate server, and an end server are formed in a tree structure, first data stored in the main server is transmitted to the end server via the intermediate server to be stored in the intermediate server and the end server. In the method for the main server to check whether or not each of the data stored in the same, the method for retrieving the data characteristics of the first data stored in the main server, the terminal server to retrieve the data characteristics of the second data stored in the terminal server Request a data characteristic of the second data from the terminal server; and checking whether the data characteristic of the first data and the data characteristic of the second data are identical. If an error is detected in the identity check, a third stored in the intermediate server as the intermediate server; Request data characteristics of data, receive data characteristics of the third data from the intermediate server, check whether the data characteristics of the first data and the data characteristics of the third data are the same, If an error is detected in the equality check of the third data, the intermediate data is transmitted again to the intermediate server, and if the sameness is recognized in the equality check of the first data and the third data, the intermediate A system, an apparatus, and a method for checking intrinsic data identity of a main server are provided, wherein the server transmits the second data to the terminal server. A recording medium is provided.

The intermediate server may be one server or at least one server may be formed in a sequential coupling relationship.

The main data identity checking method of the main server transmits a service start request corresponding to the data to the intermediate server and the end server when the sameness is recognized in the sameness checking between the first data and the second data. When the request for transmitting the data is received from a user terminal, the method may further include transmitting the data to the user terminal.

In addition, in an internet caching system in which a main server, an intermediate server, and an end server are formed in a tree structure, first data stored in the main server is transmitted to the end server via the intermediate server to be stored in the intermediate server and the end server. In the method for checking whether the intermediate server is the same between each stored data, receiving the new data from the main server, and transmits the received new data to the end server, the first data of the received new data Retrieve a property, retrieve a second data property of the new data being transmitted, examine whether the first data property is identical to the second data property, and identify the same as the first data property and the second data property If an error is detected in the inspection, the new data received from the main server is restored again. Distributed Data Equivalent test of intermediate servers characterized in that sending to the terminal server is provided, there is provided a system, apparatus, and recording medium that allows the performance of the distributed data Equivalent test method of such intermediate server.

In addition, when a request for providing any data is received from a user terminal connected to the main server through a communication network, the main server is the closest to the user terminal among at least one data server (main server, intermediate server, end server, etc.). A method of setting up to provide the data from a first data server, the method comprising: recognizing an IP address of the user terminal and using at least one IP address previously stored by each data server, the recognized IP address Retrieves a stored first data server, sets the user terminal to receive the data from the first data server, and sends a request to transfer any data requested from the user terminal to the first data server. Data providing method using a proximity server, characterized in that for transmitting Ball and, there is provided a system, apparatus, and recording medium capable of executing the data providing method using a art-up server.

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

In the Internet caching system according to the present invention, the number of subordinate servers coupled to one server through a communication network can be arbitrarily designated, and the type of data transmitted and received between each server is not limited.

However, in the present specification, for convenience, only two subordinate servers are coupled to each server, and the data transmitted and received are large media data (that is, data having an extension of ASF, WMV, WMA, etc. as movie or music data). Listen and explain.

2 is a diagram illustrating a schematic form of an internet caching system according to an exemplary embodiment of the present invention.

The location and use of each server in FIG. 2 is for illustration of the invention only and should not be configured in this form.

Referring to FIG. 2, the Internet caching system includes a main server 200, first servers 210a and 210b, second servers 220a, 220b and 220c-hereinafter referred to as 220, a third server 230, Fourth server 240, end servers 250a, 250b, 250c-hereinafter referred to as 250, and the like.

When new data is stored in the main server 200, the main server 200 transmits the data to the first servers 210a and 210b coupled through the communication network. The first server 210a or 210b stores the data received from the main server 200 and transmits the data to the second server 220 through a communication network.

By repeating these steps, new data stored in the main server 200 is transmitted to the end server 250 via the third server 230, the fourth server 240, and the like, and is stored in the end server 250.

This process is described in the case where the main server 200 is a server providing movie data, and the movie data called 'Urban Legend' is newly stored in the main server 200 as an example.

In addition, the plurality of subordinate servers including the first servers 210a and 210b may be servers of independent operators, respectively, but for convenience of description, the first servers 210a and 210b and all subordinate servers at the rear end may be provided to the same operators. For example, it belongs to.

First, when movie data called 'Campus Legend' is newly stored in the main server 200, the main server 200 is connected to the main server of the ISP-A (i.e. 1 server-210a) and the main server of the ISP-B (ie, the first server-210b).

Thereafter, the main server 210a of the ISP-A transmits the movie data to the central region jurisdiction server (ie, the second server 220) and the southern region jurisdiction server (ie, the second server 220). In addition, the central jurisdiction server 220 and the southern jurisdiction server 220 transmits to at least one partial jurisdiction server 230 coupled through a communication network, and by repeating these steps, the movie data is transmitted to the end server. Up to 250 are transmitted.

Since this process can be performed within a few seconds, there is no difference in time difference between receiving and storing the movie data between the main server 200 and the end server 250.

Therefore, even if the main server 200 does not transmit new movie data to all subordinate servers, the movie data may be stored in the same sub-server and be provided to the user.

That is, although the effects provided by the conventional caching system can be expected, the caching system according to the present invention has an advantage of minimizing the burden on the main server 200.

In other words, the conventional caching system has a method of updating the movie data to 1: 1 by each end server (110-Fig. 1) after the new movie data is updated on the main server (100-Fig. 1). I use it.

Using this method, for example, for a data requiring 300K of bandwidth, a bandwidth of 4.2M (i.e. 300K x 14) is required to update the data to 14 end servers (110-see FIG. 1). It is necessary.

Therefore, there is a disadvantage in that the burden on the line usage fee increases because the number of end servers 250 requires more line bandwidth. However, since the circuit of the main server 200 is needed only at the moment of updating the data, using the present invention can reduce unnecessary bandwidth and save circuit cost.

3 is a schematic structural diagram of each server included in the Internet caching system according to an embodiment of the present invention.

Referring to FIG. 3, each server 300 may include a new data detector 310, a controller 320, a storage 330, a transceiver 340, an error detector 360, and the like.

The above components of each server 300 may be programmed to be installed in the server so that each operation may be performed. Here, the respective components will be described based on the case where each of the components is a separate means.

First, the new data detector 310 in the arbitrary server 300 searches the storage unit 330 under the control of the controller 320 and checks whether new data is stored.

When the new data is stored, the controller 320 allows the data to be transmitted to the rear-end server 350 through the transceiver 340.

After the transmission is completed, the error detector 360 checks whether the data is transmitted to the back-end server 350 without error and stored under the control of the controller 300.

After checking that the error detection unit 360 transmits the error without error, the user may receive the new data from an arbitrary server.

Of course, the operation performed by the new data detector 310 and the error detector 360 may be performed by the controller 320 by itself, and when the operation is performed by the controller 320, the new data detector ( 310, the error detector 360 may be omitted.

4A is a data flow diagram illustrating an internet caching method according to an exemplary embodiment of the present invention, and FIG. 4B is an exemplary diagram of a data model for internet caching according to an exemplary embodiment of the present invention.

Internet caching method of the present invention to share the data stored in the main server 200 with the lower server (210, 250) to minimize the impact of Internet traffic, ensure the integrity of the data transmitted and received between each server efficiency of the user Promote

Referring to FIG. 4A, when new data is stored in the main server 200 (step 420), the process proceeds to step 425 to transmit the new data to the first server 210 through a communication network.

The data model of the new data transmitted from the main server 200 to the first server 210 may be configured as shown in FIG. 4B, for example.

Referring to FIG. 4B, the data model may include a Meta Data unit region, an Index information region, a Scripts region, a Data region, and the like.

The Meta Data part area is an area for storing general information of the file, and may include respective areas for storing information such as 'file name', 'file capacity', 'bandwidth', and 'transmission time'.

The index information area is an area for storing key frames and frame rate variations of data.

The Scripts area is an area for storing various events (for example, opening a home page, transmitting a subtitle, etc.), and may allow the sending IP address and the receiving IP address to be stored in the area.

The data area is an area where media data such as moving pictures and audio data are actually stored, and key frames exist at predetermined intervals. Key Frames allow you to control fast forward and backward through the file.

This data model may be similarly applied to the case where the data model is transmitted from the first server or the like to the lower server.

In operation 430, the main server 200 checks whether the new data stored in operation 420 is identical to the new data transmitted in operation 425.

If an error is found as a result of the check in step 430, the step 425 may be repeated, or an error message may be transmitted to the first server 210 to request an action of an operator of the first server 210.

In operation 435, the first server 210 receives and stores new data transmitted in operation 425, and proceeds to operation 440 to transmit the received new data to the terminal server 250 in operation 435.

In operation 445, the first server 210 checks whether the new data received in operation 435 is identical to the new data transmitted in operation 440, and proceeds to operation 450 to process the operation result data of operation 445 in the main server. Send to 200.

As in the case of the main server 200, if an error is detected in the first server 210, the first server 210 may repeat the operation of step 440 or transmit an error message to the first server 210 to operate the first server 210. May require action.

In step 455, the end server 250 receives and stores the new data received in step 440. In operation 460, the terminal server 250 mains the characteristic information (eg, file size, specific signal generated at a predetermined time, header information, data format, etc.) of the new data transmitted in operation 425. Request to the server.

In step 465, the main server 200 retrieves the characteristic information of the new data, and proceeds to step 470 to transmit the retrieved new data characteristic information to the end server 250.

In step 475, the end server 250 checks the error of the new data received and stored in step 455 using the new data characteristic information received in step 460.

If an error is found as a result of the check in step 455, the end server 250 may request to retransmit the new data to the first server 210 or the main server 200.

In operation 480, the terminal server 250 transmits the test result data performed in operation 475 to the main server 200 through the communication network.

In operation 485, the main server 200 confirms the transmission result of the new data by using the inspection result data received in operations 450 and 480.

If the check result of step 485 confirms that the transmission of the new data is error-free, in step 490, the main server 200 transmits a service start request for the new data to the first server 210 and the end server 250. .

In step 495, the end server 250 receives the request for transmitting the new data from the user terminal 410, and in step 500 retrieves the new data requested in step 495. In operation 505, the new data retrieved in operation 495 is transmitted to the user terminal 410 through a communication network.

Of course, in order to ensure the integrity of new data stored in each server, the following method may be applied as a method of checking whether the data is in error.

In the first method, after the new data is all stored in the main server 200, a plurality of sequential intermediate servers 210, 220, 230, and 240, and the end server 250, the main server 200 is connected to the main server 200. This is a method for checking the identity between the new data stored in the parenthesis and the new data stored in the terminal server 250.

At this time, if both new data is not the same, the main server 200 detects that the new data is not transmitted in a complete form, and the new data stored in the intermediate server coupled immediately before the end server 250 Can be checked for equality.

In other words, this method is to check the integrity of the data in the reverse order that the new data is stored in each server. Therefore, if there is no problem in the transmission process of the new data, the completeness check may be terminated once, otherwise, multiple completeness checks may be required.

Of course, the completeness check may be performed on each end server 250 instead of being performed on the main server 200.

In the second method, new data is stored in the main server 200, a plurality of sequential intermediate servers 210, 220, 230, and 240, and the end server 250, and then the main server 200 collectively stores the new data. This is how you check the integrity of your data.

In a third method, new data is stored in the main server 200, a plurality of sequential intermediate servers 210, 220, 230, 240, and the end server 250, and then new data received at each server 200. This is a method to check the identity between the data and the new data to be transmitted.

For example, in the case where the data stored in the server is a media file, the method of comparing identity between the data stored in each server will be described in detail as follows.

Windows media files generate key frames at regular intervals during encoding.

Key frames can be generated at intervals of a few seconds to several tens of seconds. For each file, key frame information is stored in a file attribute.

Fast detection, rewinding, etc. of media files is where these keyframes are located.

By comparing the information of the key frame (key frame), it is determined whether the data stored in each server is the same.

That is, by comparing the number of key frames obtained through file registration information with the number of key frames actually transmitted, it is easy to determine whether or not the identity is the same (in particular, the frame in the file registration information). Frame rate, bandwidth, and key frame spacing to easily compare files to actual file transfers).

For example, suppose a media file has a key frame interval of 5 seconds at a frame rate of 30F at 300K bandwidth, and a 60-second length of the entire file.

In this case, the total number of frames becomes 1800F (ie, 60 seconds x 30), and the number of key frames may be calculated as 360 (ie, 1800/5).

This makes it easy to determine whether or not there is an equality between the data stored in each server by comparing the number of key frames between each key frame interval and the number of key frames after completing the file transfer. Can be.

5 is a flowchart illustrating a method of providing optimal media data according to an embodiment of the present invention.

In describing an optimal media data providing method according to the present invention with reference to FIG. 5, a description of a process for generating a copy of new media data already described will be omitted.

In general, a method in which a user accesses the main server 200 and downloads arbitrary data is as follows.

First, the user accesses the main server 200 using the user terminal 410 coupled with the communication network, and selects any one data to be provided from among a plurality of data provided by the main server 200.

The user terminal 410 displays a list of at least one server capable of downloading the data, and downloads the data from the selected server when the user selects any server.

However, since this method allows the user to select a server arbitrarily, the user may not know which server maintains an optimal transmission path with his or her user terminal 410 or is in close proximity to the server.

Therefore, when the server does not maintain an optimal transmission path or is located in a remote location, a problem arises in that the user cannot expect the download speed or the quality of the downloaded data.

In order to solve this problem, the present invention provides a method for automatically searching for a server capable of automatically providing an optimal transmission service in the main server 200 to provide a transmission service.

Hereinafter, an optimal media providing method using the present invention will be described. However, a description of a general process of selecting arbitrary data among a plurality of data that a user accesses the main server 200 and provides is omitted.

Referring to FIG. 5, in operation 610, a user transmits a request for any media data to be provided by the user terminal 410 to the main server 200 through a communication network.

In step 615, the main server 200 receives a media data request from the user terminal 410, and proceeds to step 620 to confirm an IP (Internet Protocol) address of the user terminal 410.

Of course, when the user terminal 410 is not a personal computer but a mobile communication terminal, a PDA, etc., the mobile communication system uses location information (for example, GPS, base station, etc.) of the mobile communication terminal, the PDA, etc. instead of the IP address. Can be identified).

The main server 200 proceeds to step 625 to search for the end server 250 closest to the user terminal.

The conventional caching system uses a method of connecting to the ISP server corresponding to the DNS server information on the user side. However, even if the user side does not use the DNS server of the ISP and uses the DNS server of another ISP, this method may not be the connection to the nearest server because there is no problem in using the Internet.

Therefore, according to the present invention, a method of searching for the server closest to the user terminal 410 by the main server 200 may be classified as follows.

First, when searching for the closest terminal server 250 by using an IP address classified by region, the location information of each server stored in the main server 200 may be used.

Second, in case of searching for the closest terminal server 250 by using the IP address classified by ISP, the location information of the plurality of servers established by the ISP and location information of each user (for example, members Address information to be filled in when registering).

Third, the lower server coupled to the main server 200 through a communication network stores in advance an IP address for providing an optimal transmission service.

Therefore, when any user accesses the main server 200 to receive the transmission service, the main server 200 searches for a list of IP addresses stored by each subordinate server and corresponds to the IP address of the corresponding user. The lower server can perform the transmission service.

In addition, since the proximity server is searched using the IP address of the user terminal 410, the nearest server can be accessed within the shortest time regardless of the user's computer setting.

In addition, even when the user terminal 410 uses the floating IP, it is possible to determine the location where the floating IP is used, so that the nearest end server can be searched.

Here is an example of the source code that can be used in the method for 'proximity to end server search' performed on the main server.

UserIP = GetIP ();

Connect DB

Use Server_IP_Area

IF UserIP = Server_IP_Area THEN

ServerIP = Server_IP_Area.IP

Else

UserIP = Server_IP_Area2 THEN

...

Else

UserIP = Server_IP_Area_N THEN

...

END IF

Same as

That is, it finds the IP address of the connected user (UserIP = GetIP ();) and connects to the IP database (Connect DB). Then, using the area where the IP information of each server is stored in the database (Use Server_IP_Area), it is searched to which server jurisdiction the user IP address belongs (IF syntax part).

In step 630, the main server 200 transmits the media data request received in step 615 to the end server 250 found in step 625.

In operation 635, the end server 250 receives a media data request from the main server 200, and proceeds to operation 640 to search for media data requested by the user among at least one media data stored in the storage.

In operation 645, the terminal server 250 transmits the retrieved media data to the user terminal 410 through the communication network, and the user terminal 410 receives the media data in operation 650.

6 is a flowchart illustrating a method of providing optimal media data according to another exemplary embodiment of the present invention.

Referring to FIG. 6, a method of providing an optimal media data according to the present invention may include storing at least one IP address in advance in a lower server described above with reference to FIG. 5 (see description of step 625 in FIG. 5). The following description will focus on.

Referring to FIG. 6, in operation 710, the user transmits a request for any media data to be provided by the user terminal 410 to the main server 200 through a communication network.

In operation 715, the main server 200 receives a media data request from the user terminal 410, and proceeds to operation 720 to confirm the IP address of the user terminal 410.

In step 725, the main server 200 checks whether the IP address identified in step 720 is an IP address already registered in the main server 200 or the lower server (intermediate server or end server 250).

If the result of the check in step 725 is that the IP address is not registered, the process proceeds to step 730; otherwise, the process proceeds to step 735.

In operation 730, the main server 200 checks whether DNS information of the user terminal 410 is verified through information received from the user terminal 410.

Of course, in step 730, an authentication step for using the server of the ISP provider to the user may be performed first to confirm the DNS information of the user terminal 410.

If DNS information is confirmed as a result of the check in step 730, the flow proceeds to step 735.

In step 735, the main server 200 searches for the end server 250 closest to the user terminal, and proceeds to step 740 to transmit the media data request received in step 715 to the end server 250 found in step 735. do.

In operation 745, the end server 250 receives the media data request from the main server 200. In operation 750, the end server 250 requests media data requested by the user from among at least one media data stored in the storage of the end server 250. Search for.

In operation 755, the terminal server 250 transmits the retrieved media data to the user terminal 410 through the communication network in operation 750.

Referring back to step 730, if DNS information is not determined as a result of the check in step 730, the flow proceeds to step 760.

In operation 760, the main server 200 searches for media data requested by the user among at least one media data stored in the storage of the main server 200, and proceeds to operation 765 to retrieve the media data retrieved in operation 760. Send to the user terminal 410.

In operation 770, the user terminal 410 receives the media data transmitted through operations 755 and 765.

As described above with reference to FIG. 6, the method for providing optimal media data according to the present invention maintains a proximity server search method using a user's IP address, a conventional DNS server search method, and a connection path to a main server. 100% response to user's request.

Hereinafter, a movie data providing service method and an internet advertising method, which are cases where the present invention described above with reference to related drawings are actually applicable, will be briefly described.

First, the advantages of applying the present invention to the movie data providing service method will be described.

The user can be provided with movie data by connecting to a data server that stores the movie data and receiving the movie data or by using an external server that links the URL address of the movie data. It is common to click to receive the movie data.

In the case of using the former method, the user provides the movie data quickly and without errors (such as displaying or downloading the movie data on the screen of the user terminal using a separate program capable of executing a media file). I can receive it.

In addition, even if the former method is used, the user is fastest and free of errors when receiving data from a data server on which user authentication processing is performed or a data server close to his or her user terminal.

For example, data provided from ISP-A can be provided faster and without error than a user subscribed to ISP-A than a user subscribed to ISP-B.

In addition, suppose that the same movie data has a data server A located in Seoul and a data server B located in Busan.

In this case, the user located in Busan may be provided faster and without error if the movie data is provided from the data server B than from the data server A.

This requires the laying of the communication cable to ensure the data transmission rate or data integrity as necessary, but in practice the laying of the long distance communication cable corresponding to the data transmission speed is not enough, and the variables in the long distance data transmission are not limited. Because it exists.

That is, a user who does not receive the movie data through the optimal path may be interrupted or stopped for a certain time when displaying the movie data on the screen of the user terminal in real time.

Next, the advantages of applying the present invention to the Internet advertising method will be described.

In the conventional Internet advertising method, the banner advertising method is mostly used.

However, there is a new Internet advertising method, which allows a user to access a specific site or to display a predetermined advertisement on the entire user terminal screen in order to use a specific service within the site.

The user cannot close or remove the currently displayed advertisement until a predetermined time or until the advertisement ends, and the user can be provided the next service only after the advertisement ends.

The advertisement data displayed on the screen of the user terminal is provided in real time through a communication network. When such an advertisement method is generalized, there is a greater need for quickly transmitting and receiving advertisement data (ie, media data).

In other words, if the advertisement data is not sent and received quickly, the user will be reluctant to access the website, so the need for the transmission and reception of media data through the optimal path will be even greater.

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.

As described above, the present invention, by connecting the lower server of the predetermined quantity to the main server, and sequentially connecting the lower server of the predetermined quantity to each lower server to receive the update data of the main server in the lower server quickly You can save it.

In addition, the present invention can reduce the line charge by using only the minimum line bandwidth in transmitting any data to another server.

In addition, the present invention can maintain the identity between the data stored in the end server providing any data to the user and the data updated in the main server.

In addition, the present invention can optimize the transmission path between the user and the data transmission server to prevent the loss of data even during large data transmission.

In addition, the present invention can reduce circuit usage fees because each server requires only a minimum bandwidth to transmit data.

In addition, the present invention can perform data caching in combination with a plurality of lower servers even if the main server does not have expensive specifications.

Claims (18)

In an internet caching system in which an end server may be directly coupled with a main server or an intermediate server through a communication network, and the main server, the intermediate server, and the end server are formed in a tree structure, the main server may include at least one new data. In a method for providing data to an end server, The main server, Registering new first data; Transmitting the first data through a communication network to a predetermined number of intermediate servers or end servers and a predetermined number of intermediate servers, The intermediate server, Receiving the first data from a main server; Storing the first data as second data; Transmitting the second data to a terminal server of a predetermined number through a communication network; The terminal server, Receiving the first data from a main server or the second data from an intermediate server; Storing the first data or the second data as third data; Transmitting the third data to the user terminal through a communication network when there is a request for transmission of the third data from the main server to an arbitrary user terminal. New data replication method characterized in that for performing. The method of claim 1, The intermediate server, Receiving a request for transmission of the second data to any user terminal from the main server; Transmitting the second data to the user terminal through a communication network. The new data replication method further comprising. The method of claim 1, The intermediate server comprises at least one intermediate server, each intermediate server being able to form a sequential joining relationship New data replication method characterized in that. A recording medium on which a program of instructions executable by a digital processing apparatus is tangibly embodied and which can be read by the digital processing apparatus for carrying out the novel data copying method of claim 1. A memory in which a program is stored; And A processor coupled to the memory to execute the program Including but not limited to: And said processor executes the new data copying method according to claim 1 or 2 by said program. In an Internet caching system in which a main server, an intermediate server, and an end server are formed in a tree structure, first data stored in the main server is transferred to the end server via the intermediate server and stored in the intermediate server and the end server, respectively. In the main server checks whether or not the identity of the data to be, Retrieving data characteristics of the first data stored in the main server; Requesting a data property of second data stored at the end server to the end server; Receiving a data characteristic of the second data from the end server; Checking whether data characteristics of the first data and data characteristics of the second data are the same; Requesting data characteristics of third data stored in the intermediate server when the error is detected in the sameness check between the first data and the second data; Receiving a data characteristic of the third data from the intermediate server; Checking whether data characteristics of the first data and data characteristics of the third data are the same; Sending the first data back to the intermediate server if an error is detected in the identity check of the first data and the third data Requesting the intermediate server to transmit the second data to the end server if the identity is recognized in the identity check of the first data and the third data. Including but not limited to: The intermediate server is one server or at least one server in a sequential coupling relationship Distributed data identity checking method of the main server, characterized in that. The method of claim 6, Sending a service initiation request corresponding to the data to the intermediate server and the end server when the sameness is recognized in the identity check of the first data and the second data; When the request for transmitting the data is received from the user terminal, transmitting the data to the user terminal. Distributed data identity checking method of the main server further comprising a. In an Internet caching system in which a main server, an intermediate server, and an end server are formed in a tree structure, first data stored in the main server is transferred to the end server via the intermediate server and stored in the intermediate server and the end server, respectively. In the method for the intermediate server to check whether or not the identity between the data, Receiving new data from the main server; Transmitting the received new data to the end server; Retrieving a first data characteristic of the received new data; Retrieving a second data characteristic of the transmitted new data; Checking for equality between the first data characteristic and the second data characteristic; Transmitting new data received from the main server back to the end server when an error is detected in the identity check of the first data characteristic and the second data characteristic. Distributed data identity checking method of the intermediate server comprising a. A memory in which a program is stored; And A processor coupled to the memory to execute the program Including but not limited to: The processor performs the distributed data identity checking method according to any one of claims 6 to 8 by the program. 10. A recording medium tangibly embodied and readable by a digital processing device, the program of instructions being executed by the digital processing device for performing the distributed data identity checking method according to any one of claims 6 to 8. . When a random data providing request is received from a user terminal connected to a main server through a communication network, the main server is configured to provide the data from a first data server closest to the user terminal among at least one data server. To Recognizing an IP address of the user terminal; Searching for a first data server in which the recognized IP address is stored using at least one IP address previously stored in each data server; Setting, by the user terminal, to receive the data from the first data server; Transmitting a request for transmission of any data requested from the user terminal to the first data server Including but not limited to: The data server includes at least one of the main server, the intermediate server, the end server Data providing method using a proximity server characterized in that. A memory in which a program is stored; And A processor coupled to the memory to execute the program Including but not limited to: And the processor executes the data providing method using the proximity server according to claim 11 by the program. A recording medium on which a program of instructions that can be executed by a digital processing apparatus is tangibly implemented and can be read by the digital processing apparatus to perform the data providing method using the proximity server according to claim 11. In an internet caching system in which an end server can be directly coupled to a main server or an intermediate server through a communication network, and the main server, the intermediate server, and the end server are formed in a tree structure. Means for storing new first data; Means for transmitting said first data through a communication network to a predetermined number of intermediate or end servers and a predetermined number of intermediate servers A main server system comprising a, Means for receiving the first data from the main server system; Means for storing the first data as second data; Means for transmitting the second data to a terminal server of a predetermined quantity via a communication network An intermediate server system comprising a, Means for receiving the first data from the main server system or the second data from the intermediate server system; Means for storing the first data or the second data as third data; Means for transmitting the third data to the user terminal via a communication network when there is a request for transmission of the third data from the main server system to any user terminal. End server system comprising a New data replication system comprising a. The method of claim 14, The intermediate server system, Means for receiving a request for transmission of the second data to any user terminal from the main server; Means for transmitting the second data to the user terminal via a communication network The new data replication system further comprises. The main server, the intermediate server, and the end server are formed in a tree structure, and the first data stored in the main server is transmitted to the end server via the intermediate server, and the sameness between the data stored in the intermediate server and the end server, respectively. In the Internet caching system that can check whether or not using the main server, Means for retrieving a data characteristic of the first data; Requesting the data characteristic of the second data stored in the end server to the end server, and when an error is detected in the sameness check of the first data and the second data, a third stored in the intermediate server to the intermediate server Means for requesting a data characteristic of the data; Means for receiving a data characteristic of the second data from the end server or a data characteristic of the third data from the intermediate server; Means for checking whether a data characteristic of the first data is identical to a data characteristic of the second data or the third data; Means for sending the first data back to the intermediate server if an error is detected in the identity check of the first data and the third data Distributed data identity checking system of the main server comprising a. A main server, an intermediate server, and an end server are formed in a tree structure, and the first data stored in the main server is transmitted to the end server via the intermediate server and the same data is stored in the intermediate server and the end server, respectively. In the Internet caching system that can check whether using the intermediate server, Means for receiving new data from the main server; Means for transmitting the received new data to the end server; Means for retrieving the first data characteristic of the received new data and the second data characteristic of the transmitted new data; Means for checking for equality between the first data characteristic and the second data characteristic Distributed data identity checking system of the intermediate server comprising a. A system for setting the main server to provide the data from a first data server closest to the user terminal among at least one data server when a request for providing a data is received from a user terminal connected to the main server through a communication network; To Means for recognizing an IP address of the user terminal; Means for retrieving a first data server in which the recognized IP address is stored, using at least one IP address previously stored by each data server, wherein the data server comprises: the main server, the intermediate server, At least one of the end servers; Means for enabling the user terminal to receive the data from the first data server; Means for sending a request to transfer any data requested from the user terminal to the first data server Data providing system using a proximity server comprising a.