WO2010008192A2

WO2010008192A2 - Method and apparatus for providing a content delivery service

Info

Publication number: WO2010008192A2
Application number: PCT/KR2009/003878
Authority: WO
Inventors: 이윤근
Original assignee: 주식회사 씨디네트웍스
Priority date: 2008-07-15
Filing date: 2009-07-15
Publication date: 2010-01-21
Also published as: WO2010008192A3; KR20100008046A

Abstract

A method and an apparatus for providing a content delivery service are disclosed. According to one embodiment of the present invention, service URL information is received from a cache server and a service URL and an origin URL are mapped, the mapped origin URL information is transmitted to the cache server, and content requested from a client are transmitted to the client by the cache server through the use of received origin URL information. The present invention has advantages in that a differentiated content delivery service can be provided in accordance with the area where a client is located or with an ISP to which the client is subscribed.

Description

Method and apparatus for providing content delivery service

The present invention relates to a method and a device for providing a content delivery service. More particularly, the present invention provides a method and apparatus for managing a cache server that stores content and delivers the content to a client in a content delivery service. A method and apparatus capable of providing differentiated content delivery network services are provided.

Content delivery service is to distribute content that is concentrated in server of contents provider (CP) to other server and store contents and to deliver content to client through optimal path. Communication networks in which such content delivery services are provided are referred to as content delivery networks, and such services are called content delivery services, content delivery network services, or CDN services.

In this content transfer service, the server where the original content is stored is called the origin server or the origin server, and the server where the content concentrated on the server of the content provider is distributed and stored is called the cache server. .

Such a cache server allows a client to receive content by using a redirection method, which is temporarily stored according to a user's request for content transmission and transmitted to the client, or connected to the origin server when there is no corresponding content in the cache server. .

In addition, when there are many requests for transmission of the corresponding content, the corresponding content may be stored in the cache server, and when the request for transmission is low, the content may be stored and then deleted.

On the other hand, the conventional cache server looks at the process of transmitting the corresponding content or connected to the origin server in accordance with the content transfer request received from the client.

First, when a specific URL (Uniform Resource Locator) is input from a client, a network device such as a DNS (Domain Name System) server is used to access a cache server located in an optimal path with the client.

For example, if you enter http: ///d.tif on the client, the cache server located at the optimal path with the client will be changed to cdn1-abc.com/d.tif, which is the URL of the preset cache server. The connection to the cache server.

Meanwhile, the cache server recognizes the content request for the origin server called http: ///d.tif from the URL cdn1-abc.com/d.tif and transfers the content directly to the client as described above. You will be working to make the connection.

Of these URLs, the URL of the origin server entered by the client, that is, the URL such as http: ///d.tif in the above example, is called the origin URL and is the access address of the cache server cdn1-abc.com/ which is actually accessed and processed. d.tif is sometimes called a service URL.

However, in the conventional content delivery service process, when the service URL is directly input by the client, the content delivery network service is provided regardless of the region where the client is located or whether the subscribed Internet service provider (ISP) service is available. There is a problem that becomes possible.

In addition, when the URL of the origin server is changed or the content delivery network service of the origin server is terminated, there is a problem that the URL information of the origin server must be changed or deleted in a plurality of cache servers.

In order to solve the conventional problems as described above, the present invention is to propose a method and apparatus for providing a content delivery service capable of a content delivery network service differentially according to the area where the client is located or the subscribed ISP.

In addition, when the URL of the origin server is changed or the content delivery network service of the origin server is terminated, a method and apparatus for providing a content delivery service that does not need to change or delete the URL information of the origin server to a plurality of cache servers one by one will be.

Still other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to an aspect of the present invention there is provided a method for providing a content transmission service.

According to a preferred embodiment of the present invention, the cache server management in a Contents Delivery Networks system including a client, a cache server, a cache server management apparatus, and an origin server. A method of providing a content delivery service performed by an apparatus, the method comprising: receiving service URL (Uniform Resource Locator) information from the cache server; Mapping (b) the service URL to an origin URL; And (c) transmitting the mapped origin URL information to the cache server, wherein the cache server transmits the content requested from the client to the client using the received origin URL information. A content delivery service providing method is provided.

In step (a), the server further receives the information of the client together with the service URL information, and from the received client information, at least one of information on a region where the client is located and information on an ISP (Internet Service Provider) to which the client is subscribed. Extracting information that includes; And determining whether it is possible to provide a content delivery service to the client by using the extracted information. If it is determined that the content delivery service is available, the step (b) is performed.

In step (a), further receiving information including at least one of the service URL information, the region information where the client is located, and the Internet Service Provider (ISP) information to which the client subscribes,

Determining whether it is possible to provide a content transmission service to the client using the received information,

And if it is determined that the provision of the content delivery service is possible, the step (b) is performed.

In addition, when it is determined that provision of the content transmission service is impossible, the control signal may be transmitted to the cache server to prevent the content transmission service from being performed.

The cache server transmitting the content requested from the client to the client may directly transmit the content to the client when the cache server stores the content requested by the client.

The cache server transmits the content requested from the client to the client, when the cache server does not store the content requested by the client, the origin server and the client are connected to transmit the content. Can be performed.

The cache server transmitting the content requested from the client to the client, if the cache server is not storing the content requested by the client to search for another cache server that stores the content to store the content The cache server may be connected to the client so that the content may be transmitted.

The cache server transmitting the content requested from the client to the client may include the content from the origin server or another cache server storing the content when the cache server is not storing the content requested by the client. Receiving the can transmit the content requested from the client to the client.

The origin URL information may be received from the origin server.

According to another aspect of the present invention, an apparatus for providing content delivery service is provided.

According to a preferred embodiment of the present invention, in a Contents Delivery Networks system including a client, a cache server, and an origin server, the cache server and the origin server are connected. An apparatus for providing a content delivery service, the apparatus comprising: a URL mapping unit for mapping a service URL and an origin URL received from the cache server; And a transceiver configured to receive the service URL information from the cache server and to transmit the origin URL information mapped to the cache server, wherein the cache server uses the requested content from the client using the received origin URL information. Provided is a content transmission service providing apparatus for transmitting to the client.

The transceiver further receives information of the client together with the service URL information, and the content transmission service providing apparatus further includes information on a region where the client is located and information about an ISP (Internet Service Provider) to which the client is subscribed. The apparatus may further include a client information extractor configured to extract information including at least one of the information.

In addition, the content transmission service providing apparatus determines whether it is possible to provide a content transmission service to the client using the client information extracted by the client information extracting unit, and if the content transmission service is determined to be provided, the URL. The mapping unit may perform the URL mapping.

If it is determined that the content delivery service is not available to the client using the information extracted by the client information extracting unit, the content transmission service is not performed by the cache server. Control signals can be sent that prevent them.

The transceiver may further receive information including at least one of the service URL information, region information where the client is located, and Internet service provider (ISP) information subscribed to the client.

In addition, the content transmission service providing apparatus content to the client using the information including at least one of the received service URL information, the region information where the client is located, and the Internet Service Provider (ISP) information to which the client subscribes. If it is determined that the transmission service is available, the URL mapping unit may perform the URL mapping when it is determined that the content transmission service is available.

In addition, if it is determined that the content transmission service is not provided to the client, it is possible to transmit a control signal to prevent the content transmission service from being performed to the cache server.

The transceiver may receive the origin URL information from the origin server.

According to another aspect of the present invention, there is provided a recording medium recording a program for implementing the method for providing a content delivery service.

According to a preferred embodiment of the present invention, the cache server management in a Contents Delivery Networks system including a client, a cache server, a cache server management apparatus, and an origin server. A recording medium on which a program of instructions that can be executed by a digital processing apparatus is tangibly implemented so that a method of providing a content transfer service performed by a device is implemented, and which records a program that can be read by the digital processing apparatus. (A) receiving service Uniform Resource Locator (URL) information from a server; Mapping (b) the service URL to an origin URL; And (c) transmitting the mapped origin URL information to the cache server, wherein the cache server transmits the content requested from the client to the client using the received origin URL information. Provided is a recording medium recording a program for implementing a method for providing a content delivery service.

The origin URL information may be received from the origin server.

As described above, according to the method and apparatus for providing a content delivery network service according to the present invention, there is an advantage in that a content delivery network service can be differentiated according to a region where a client is located or a registered ISP.

In addition, when the URL of the origin server is changed or the content delivery network service of the origin server is terminated, there is an advantage that it is not necessary to change or delete URL information of the origin server in a plurality of cache servers.

1 is a block diagram showing the configuration of a content delivery network system according to an embodiment of the present invention.

2 is a flowchart illustrating a sequence in which a content delivery service is provided according to an exemplary embodiment of the present invention.

3 is a block diagram showing the configuration of a cache server management apparatus for providing a content transfer service according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the drawings, similar reference numerals are used for similar elements. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention.

Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted.

First, a configuration of a content delivery network system according to an exemplary embodiment of the present invention will be described with reference to FIG. 1.

As shown in FIG. 1, a contents delivery network system according to an exemplary embodiment of the present invention includes a client 100, a cache server 110, a cache server managing apparatus 120, and an origin server 130. ) May be included.

Meanwhile, in FIG. 1, only one component is illustrated for convenience of description, but one or more components may be present.

First, the client 100 is a device that is connected through a communication network to access the cache server 110 or the origin server 130 to receive the content.

The client 100 includes a web browser (not shown) that allows access to the cache server 110 or the origin server 130 and an application (not shown) required for playback when the content is played. It is apparent that the web browser and the application may be installed in the form of a program on the client 100.

The client 100 may have a communication function and may be connected to the cache server 110 or the origin server 130. The client 100 may install a program capable of playing the received content, and display the outputted content. There is no limitation if the device includes a.

The client 100 may be, for example, a wireless terminal such as a personal computer (PC), a mobile phone, a personal digital assistant (PDA), and the like, but is not limited thereto.

The cache server 110 transmits the content to the client 100 when the content is stored in the cache server 110 or the origin server when there is no corresponding content in the cache server 110 according to a content transfer request from the client 100. The client 100 may receive the content by using a redirection method connected to the 130.

In the present invention, the cache server management apparatus 120 performs the URL mapping that receives the service URL information received from the client 100 from the cache server 110 and matches the origin URL information.

In addition, the client 100 receives the client 100 information such as the IP address of the client 100 requesting the transmission of the content from the cache server 110 and the location of the client 100 or the client 100 through the IP address analysis, etc. It is possible to extract the subscribed ISP (Internet Service Provider) information.

Then, the extracted information of the client 100 is used to determine whether to provide a content transmission service to an area where the client 100 is located or to a registered ISP.

As a result of the determination, in the case of the client 100 subscribed to the region or the ISP providing the content transmission service, the cache server 110 may control to perform a function such as content transmission or redirection to the corresponding client.

On the other hand, if it is determined that the client 100 that is not affiliated with the region or ISP that provides the content transmission service is controlled, the cache server 110 may not perform a function such as content transmission or redirection to the client 100. Can be.

In addition, when the content provider (CP) deletes the content or changes the URL where the content is located, the cache server management apparatus 120 changes or deletes the URL to change the content transfer service in the cache server 110. This can be done.

The cache server management apparatus 120 receives the corresponding information from the origin server 130 when the origin URL, which is information on which the content is located in the origin server 130, is deleted or deleted, and the service URL received from the cache server 110. The changed origin URL can be mapped to connect to the changed origin URL.

Meanwhile, in FIG. 1, only one cache server 110 and one cache server managing apparatus 120 are illustrated, but a plurality of cache servers 110 and one cache server managing apparatus 120 are connected or a cache server. As described above, there may be a plurality of management devices 120.

The origin server 130 stores and transmits the content of the content provider CP. In addition, the redirection method may be directly connected to the client 100 through the cache server 110 to transmit content to the client 100.

In addition, the origin server 130 transmits the origin URL information to the cache server management apparatus 120 when the URL of the corresponding content is changed or deleted.

According to the content delivery network system according to the present invention, the URL mapping is performed in the separate cache server management apparatus 120 connected to the cache servers 110 to reflect the change of the URL directly to the cache servers 110. In addition, as described above, by using the client 100 information such as IP address information of the client 100 received from the cache server 110, it is possible to provide a differentiated content transmission service according to the client 100. Will be.

Hereinafter, the order in which the content delivery service is provided according to an exemplary embodiment of the present invention will be described with reference to the configuration of the content delivery network system.

As shown in FIG. 2, the cache server managing apparatus 120 according to the present invention first receives service URL information from the cache server 110 (S200).

When the service URL information is received, information of the client 100 to which the content is to be transmitted, for example, IP address information of the client may be received together.

In operation S202, the received service URL is mapped to the origin URL, and information about the origin URL is transmitted to the cache server 110 (S206).

On the other hand, the cache server management device 120 receives the client 100 information from the cache server 110 as well as the URL mapping operation as described above to extract the local information or ISP information, etc. where the client 100 is located. The extracted information may be used to determine whether the content transmission service is provided by determining whether the region where the client 100 is located or a registered ISP can provide the content transmission service.

Of course, it is possible to provide the content transfer service in the cache server management apparatus 120 by extracting local information or ISP information, etc., located in the corresponding client 100 from the cache server, and delivering only the extracted information to the cache server management apparatus 120. It may be possible to provide the content transmission service according to the determination.

Although not shown in FIG. 2, the cache server 110 that receives the origin URL information transmits the content directly to the client 100 when the content exists using the origin URL information. 100 and the origin server 130 are connected so that the client 100 can receive the corresponding content.

Alternatively, the client 100 may receive the content by performing the redirection to another cache server 110 storing the corresponding content without performing the redirection to the origin server 130. .

In addition, when the cache server 120 does not store the content, the cache server 120 receives the content from another cache server or the origin server 130 storing the content and transmits the content to the client 100 in various ways. Content delivery service can be provided.

The configuration of the cache server management apparatus 120 according to the present invention that enables the provision of such a content transmission service will be described with reference to FIG. 3.

3 is a block diagram showing the configuration of a cache server management device 120 for providing a content transfer service according to an embodiment of the present invention.

As shown in FIG. 3, the cache server managing apparatus 120 according to an exemplary embodiment of the present invention may include a transceiver 300, a URL mapping unit 310, and a client information extracting unit 320. .

The transceiver 300 transmits and receives data to and from the cache server 110 and the origin server 130.

The transceiver 300 receives service URL information from the cache server 110, and transmits origin URL information mapped to the service URL to the cache server 110.

In addition, the transceiver 300 receives the changed origin URL information when the origin URL 130 is changed in the origin server 130.

The URL mapping unit 310 maps the service URL received from the cache server 110 and the origin URL.

The mapped origin URL information is transmitted to the cache server 110 through the transceiver 300.

The client information extracting unit 320 may receive information of the client 100 to transmit the content, for example, IP address information of the client 100, while receiving the service URL information from the cache server 110. From the received information of the client 100, the region where the client 100 is located or the ISP information that the client 100 subscribes to is extracted.

Of course, as described above, the cache server extracts local information or ISP information, etc., in which the client 100 is located, and transfers only the extracted information to the cache server management apparatus 120 to transmit the content in the cache server management apparatus 120. It may also be possible to provide the content transmission service according to the determination whether the provision of the present invention, in this case, the client information extraction unit 320 may not be included in the cache server management apparatus 120 according to the present invention.

The cache server management apparatus 120 determines whether the content transmission service is provided by determining whether the region where the client 100 is located or the subscribing ISP can provide the content transmission service using the information extracted by the client information extraction unit 320. You can decide.

Meanwhile, although not shown in FIG. 3, the cache server management apparatus 120 according to the present invention generates a control signal for controlling each of the above-described components, and determines whether to provide the content transfer service of the cache server 110. The controller may further include a controller (not shown) for generating a corresponding control signal.

Meanwhile, as described above, the cache server 110 that receives the origin URL information transmits the content directly to the client 100 when the content exists using the origin URL information. ) And the origin server 130 are connected so that the client 100 can receive the corresponding content.

In addition, the client 100 may receive the content by performing the redirection to another cache server 110 that stores the content without performing the redirection to the origin server 130.

If the cache server 120 does not store the corresponding content, a method of receiving the corresponding content from another cache server or the origin server 130 storing the corresponding content and transmitting the content to the client 100 may be possible. In the method of allowing content to be transmitted to the client is not limited thereto.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

Claims

A method for providing a content delivery service performed by the cache server management apparatus in a contents delivery network system including a client, a cache server, a cache server management apparatus, and an origin server. To

(A) receiving service Uniform Resource Locator (URL) information from the cache server;

Mapping (b) the service URL to an origin URL; And

(C) transmitting the mapped origin URL information to the cache server.

And the cache server transmits the content requested from the client to the client using the received origin URL information.
The method of claim 1,

In step (a) further receives the information of the client with the service URL information,

Extracting, from the received client information, information including at least one of local area information of the client and Internet service provider (ISP) information subscribed to the client; And

Determining whether it is possible to provide a content transmission service to the client by using the extracted information.

And if it is determined that the provision of the content delivery service is possible, the step (b) is performed.
The method of claim 1,

In step (a), further receiving information including at least one of the service URL information, the region information where the client is located, and the Internet Service Provider (ISP) information to which the client subscribes,

Determining whether it is possible to provide a content transmission service to the client using the received information,

And if it is determined that the provision of the content delivery service is possible, the step (b) is performed.
The method according to any one of claims 2 and 3, wherein

If it is determined that the provision of the content delivery service is impossible, the content transmission service providing method characterized in that for transmitting the control signal to prevent the content delivery service to the cache server.
The method of claim 1,

The cache server transmits the content requested from the client to the client,

And transmitting the content directly to the client when the cache server stores the content requested by the client.
The method of claim 1,

The cache server transmits the content requested from the client to the client,

And if the cache server does not store the content requested by the client, the origin server and the client are connected so that the content is transmitted.
The method of claim 1,

The cache server transmits the content requested from the client to the client,

If the cache server does not store the content requested by the client, the server searches for another cache server that stores the content and connects the cache server storing the content to the client so that the content is transmitted. Method for providing a content transmission service, characterized in that performed by.
The method of claim 1,

The cache server transmits the content requested from the client to the client,

If the cache server does not store the content requested by the client, the content is received from the origin server or another cache server storing the content and transmits the requested content from the client to the client Content delivery service providing method.
The method of claim 1,

And the origin URL information is received from the origin server.
An apparatus for providing a content delivery service by connecting to the cache server and the origin server in a contents delivery network system including a client, a cache server, and an origin server. ,

A URL mapping unit for mapping a service URL and an origin URL received from the cache server; And

And a transceiver configured to receive the service URL information from the cache server and to transmit the origin URL information mapped to the cache server.

And the cache server transmits the content requested from the client to the client by using the received origin URL information.
The method of claim 10,

The transceiver unit further receives the information of the client together with the service URL information,

The apparatus for providing content transmission service further includes a client information extracting unit for extracting, from the received client information, information including at least one of local area information of the client and Internet service provider (ISP) information subscribed to the client. Apparatus for providing a content transmission service.
The method of claim 11, wherein

The content transmission service providing apparatus,

Determine whether it is possible to provide a content delivery service to the client by using the client information extracted by the client information extraction unit, and if it is determined that provision of the content delivery service is possible, the URL mapping unit to perform the URL mapping. Apparatus for providing a content transmission service, characterized in that.
The method of claim 11, wherein

As a result of determining whether the content transmission service can be provided to the client by using the information extracted by the client information extracting unit,

And transmitting a control signal to the cache server to prevent the content transmission service from being determined to be impossible to provide the content transmission service.
The method of claim 10

And the transmitting and receiving unit further receives information including at least one of the service URL information, the region information where the client is located, and the Internet service provider (ISP) information to which the client is subscribed.
The method of claim 14,

The content transmission service providing apparatus,

Determining whether the content transmission service can be provided to the client using the received service URL information, information including at least one of region information on the client and internet service provider (ISP) information subscribed to the client, And determining that the URL mapping unit performs the URL mapping when it is determined that the content transmission service can be provided.
The method of claim 14,

As a result of determining whether the content delivery service can be provided to the client,

And transmitting a control signal to the cache server to prevent the content transmission service from being determined to be impossible to provide the content transmission service.
The method of claim 10,

The cache server transmits the content requested from the client to the client,

And transmitting the contents directly to the client when the cache server stores the contents requested by the client.
The method of claim 10,

The cache server transmits the content requested from the client to the client,

And if the cache server does not store the content requested by the client, the origin server and the client are connected so that the content is transmitted.
The method of claim 10,

The cache server transmits the content requested from the client to the client,

If the cache server does not store the content requested by the client, the server searches for another cache server that stores the content and connects the cache server storing the content to the client so that the content is transmitted. Apparatus for providing a content transmission service, characterized in that performed by.
The method of claim 10,

The cache server transmits the content requested from the client to the client,

If the cache server does not store the content requested by the client, the content is received from the origin server or another cache server storing the content and transmits the requested content from the client to the client Device for providing a content delivery service.
The method of claim 10,

And the transmitting / receiving unit receives the origin URL information from the origin server.
A method for providing a content delivery service performed by the cache server management apparatus in a contents delivery network system including a client, a cache server, a cache server management apparatus, and an origin server. In the recording medium on which a program of instructions executable by a digital processing apparatus is tangibly implemented and which can be read by the digital processing apparatus so as to be implemented,

(A) receiving service Uniform Resource Locator (URL) information from the cache server;

Mapping (b) the service URL to an origin URL; And

(C) transmitting the mapped origin URL information to the cache server.

The cache server records a program for implementing a method for providing a content delivery service, characterized in that for transmitting the content requested from the client to the client using the occasional origin URL information.