KR20100054659A - System and method for contents delivery based on multiple content delivery network providers, and content server thereof - Google Patents

Abstract

PURPOSE: A content distribution system through a plurality of CDN business carriers and a method, and a contents server for enhancing the reliability of the contents delivery, and a contents server are provided to reduce a delay time in a middle mile section by routing contents request after selecting a proper CDN business carrier. CONSTITUTION: A contents server transmits objects to a duplication server(130). The contents server transmits a request of a client. The contents server selects the CDN business carrier transmitting the objects with reference to the location of the client. An object store location URL(Uniform Resource Locator) of the selected CDN business carrier is included in HTTP 302 redirection message. A provider name server(140) corresponding to URL transmits the IP address of the specific replicated server to the client.

Description

System and method for contents delivery based on multiple Content Delivery Network providers, and content server

The present invention relates to a content distribution system and method through a CDN service provider, and a content server thereof. In particular, a content server receiving a request for an object included in a page from a client selects a CDN service provider to provide a corresponding object among a plurality of CDN service providers. Content distribution system and method through a plurality of CDN providers, which allows a client to receive an object from a replication server of a specific CDN provider by including a URL of an object storage location of a selected CDN provider in an HTTP 302 redirect message, and the content server It is about.

In general, the number of contents (eg, videos, music, files, etc.) that a content provider (CP) provides to a client is very large. There is a heavy load for a web server to provide some or all of these to each of the multiple clients one-to-one. This is because a web server is connected to a single Internet Service Provider (ISP), whereas clients requesting content exist in multiple ISPs.

Therefore, traffic between ISPs increases exponentially as the number of content providers and clients increases, and transmission delay and / or transmission failure rate due to traffic congestion increases. In the worst case, the web server may fail over.

The CDN (Content Delivery Network) has been introduced to overcome this problem. A CDN is a collection of content that is concentrated on a content provider's web server that is remote from clients, such as pictures, banners, video, or audio. Point-of-presence is stored in the host server which is widely distributed, and the client connects to the host server through the returned path by returning the path of the host server closest to the user when requested by the client. This service allows you to receive content. The host server is variously referred to as a cache server, a replication server, or a ghost server.

However, it would be expensive and time-consuming to install and operate a replica server that would allow a single CDN service provider to serve all regions of the world. To this end, content internetworking technology has been discussed.

Content interworking technology is a technology that enables CDN operators to interwork with each other, also referred to as 'content peering' technology. Content interworking technology is a technology used by a CDN provider when it cannot cover a global network with sufficient penetration depth and is a technology required to expand its content distribution area.

For details on content interoperability techniques, see Internet draft- "content internetworking architectural overview", "distribution requirements for content internetworking", "content distribution internetworking (CDI) AAA requirements" and RFC3570 "content distribution internetworking (CDI) scenarios", And standard documents.

Also, R. Buyya, AMK Pathan, J. Broberg, and Z. Tari, "A Case for Peering of Content Delivery Networks," IEEE Distributed Systems Online, Vol. . 7, No. 10, IEEE CS Press, Los Alamitos, CA, USA, October 2006, and discusses content interoperability technologies and systems that have been discussed from the past to the present.

The standard documents and references disclose the contents of CDN service providers in providing services to clients, and introduce a virtual organization model for redirection, distribution, and accounting. Is proposing.

According to these contents, previously discussed techniques are as follows. When a client in a specific region requests specific content to the content provider, the content request is redirected to the CDN provider contracted with the content provider, and the CDN provider selects a CDN provider that is geographically close to the client among other CDN providers that are interoperable with the content. Select this to redirect the content request and respond to the client's request.

This conventional method has the following problems.

Regardless of the location of the client requesting the content first, it is routed to the CDN provider contracted with the content provider, and then to the CDN provider closest to the client, thereby providing latency (RRT) in the middle mile section of the Internet. : Round Trip Time occurs.

Secondly, if the client's request is not properly responded during the interworking, the customer may have difficulty in identifying the responsibility for the inconvenience.

There is a need for a method for improving the above problems.

The present invention has been proposed to solve the above-mentioned problems. In the content server receiving an object included in a page from a client, the content server selects a CDN service provider to provide the corresponding object among a plurality of CDN service providers and selects an object of the selected CDN service provider. It is an object of the present invention to provide a content distribution system and method through a plurality of CDN providers to receive an object from a replication server of a specific CDN provider by transmitting a storage location URL in an HTTP 302 redirect message to a client.

Content distribution method through a plurality of CDN operators of the present invention for achieving the above object, the storage step of receiving and storing the object contained in the page from the content server at least one copy server of the plurality of CDN operators, the content When the server receives the request for the object from the client that has received the page, the CDN provider to transmit the object among the plurality of CDN providers are selected by referring to the client location and the object storage location of the selected CDN provider. A message transmission step of transmitting a URL to the client by including the URL in an HTTP 302 redirection message; and from the local name server of the client that receives the message, to the URL that receives an IP address query of the replication server storing the object. The one or more replica servers in the corresponding provider name server Send the object via the local name server, the IP address of a particular replica server comprises an address transmission step of transmitting to the client.

In the content distribution method through a plurality of CDN providers of the present invention, the message transmission step, characterized in that the content server refers to the location of the client using the IP address information of the client.

In the content distribution method through a plurality of CDN providers of the present invention, the message transmission step, the content server is one or more information of the service area information of the plurality of CDN providers and object information serviced by the plurality of CDN providers. The CDN service provider for transmitting the object may be selected with reference to the global network map.

In the content distribution method through a plurality of CDN providers of the present invention, the address transmission step, the data traffic information of the at least one replication server in the provider name server, local proximity information between the at least one replication server and the client and the one The IP address of the specific replication server is transmitted to the local name server in consideration of at least one piece of object information stored in each of the above replication servers.

Content distribution system through a plurality of CDN providers of the present invention for achieving the above object, and stores one or more replication server, the page and the object of a plurality of CDN providers to receive and store the objects contained in the page and And transmitting the page to the one or more replication servers, storing the object, and transmitting the page according to a client's request. A content server which selects a CDN service provider to transmit the object to and transmits the object storage location URL of the selected CDN service provider to an HTTP 302 redirect message, and a local name server of the client side receiving the message; IP address of the replication server storing the object When receiving the query and a response is operator name server of the one or more replicated servers to send the object via the local name server, the IP address of the server corresponding to a particular clone, the URL to be transmitted to the client.

In the content distribution system through a plurality of CDN providers of the present invention, the content server is characterized by referring to the location of the client using the IP address information of the client.

In a content distribution system through a plurality of CDN providers of the present invention, the content server may include a global network map including at least one of service area information of the plurality of CDN providers and object information serviced by the plurality of CDN providers. By reference, the CDN provider for transmitting the object is selected.

In the content distribution system through a plurality of CDN providers of the present invention, the service provider name server, the data traffic information of the one or more replication server, local proximity information between the one or more replication server and the client and each of the one or more replication server The IP address of the specific replica server is transmitted to the local name server in consideration of one or more pieces of stored object information.

Content server of the present invention for achieving the above object, the transmission and reception unit for transmitting and receiving data, the content database storing the page and the objects contained in the page, service area information of a plurality of CDN operators and the plurality of CDN providers A global network map database storing one or more information of the object information serviced by the service provider, and transmitting and storing the object to one or more replication servers of the plurality of CDN operators through the transceiver unit, and transmitting the object to the client through the transceiver unit. When the page is requested, the page is transmitted to the client. When the object is requested from the client through the transceiver, the plurality of CDN companies are referred to by referring to the location of the client and the information stored in the global network map database. Here the selection of the CDN provider to transmit the object, and a control unit for transmitting the object storage location URL of the selected CDN provider to the client, including the HTTP 302 redirect message.

In the content server of the present invention, the control unit may refer to the location of the client using IP address information of the client.

In the content server of the present invention, the global network map database further includes IP address information corresponding to service areas of the plurality of CDN service providers.

In the content server of the present invention, the control unit may further select the CDN service provider to which the object is to be transmitted by referring to the IP address information.

In the content server of the present invention, the global network map database may further include storage location URL information of each of the plurality of CDN service providers.

In the content server of the present invention, the control unit includes the object storage location URL in the HTTP 302 redirection message by referring to object storage location URL information of each of the plurality of CDN providers included in the global network map database. Characterized in that the transmission.

According to the present invention, the content server selects the most appropriate CDN provider to respond to the client's object request and routes the corresponding content request so that no additional delay time is generated in the middle mile section, and the CDN providers need to interoperate. This can increase the reliability of content delivery.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing in detail the operating principle of the preferred embodiment of the present invention, if it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings.

1 is a block diagram of a content distribution system through a plurality of CDN operators according to an embodiment of the present invention. Referring to FIG. 1, the content distribution system according to the present embodiment includes a client 110, a local name server 120, a replication server 130, a business name server 140, a content provider name server 150, and a content server ( 160 and network 170.

The client 110 refers to equipment such as a computer that receives information from a server connected to the network 170. The client 110 includes a browser and a resolver. When a URL (Uniform Resource Locater) for requesting specific content is input to the browser of the client 110, a resolver connected to the browser accesses a local name server 120 that is registered in advance. It converts the name into an Internet Protocol (IP) address of the content server 160 providing the corresponding content.

In the present invention, when the client 110 receives a page from the content server 160 using the IP address of the content server 160, the client 110 parses the page and stores the object using the URL of the object included in the page. The local name server 120 is queried for the server's IP address. Subsequently, when the IP address of the content server 160 storing the object included in the page is received from the local name server 120, the server accesses the content server 160 using the IP address.

Subsequently, when URL information regarding the location of the object included in the page is received from the content server 160 through a HyperText Transfer Protocol (HTTP) 302 redirection message, the object is transmitted to the local name server 120 using the corresponding URL. Query the server's IP address. When the client 110 receives the IP address of the server storing the object from the local name server 120, the client 110 connects to the replica server 130 and receives the object included in the page. The HTTP 302 redirect message is one of response messages according to the HTTP protocol protocol for redirecting the request of the client 110 to a URL of another location.

The local name server 120 refers to a DNS (Domain Name Server) for converting a domain name into an IP address, and converts a symbolic name into a numeric address used by a machine to inform the name server. It is a kind. The local name server 120 receiving the domain name information of the content server 160 from the resolver of the client 110 receives the IP (Internet Protocol) address of the content server 160 corresponding to the domain name. Return).

In addition, when the local name server 120 receives a request for the IP address of the server storing the object included in the page from the client 110, the local name server 120 is included in the page through a message transmission and reception with the operator name server 140 that is a name server of the CDN provider side. It receives the IP address of the replication server 130 storing the stored object, and transmits the IP address to the client (110).

The replication server 130 is also called a cache server, for example, and stores a copy of an object stored and managed by the content server 160 to quickly provide a content request from the client 110. It plays a role.

The business name server 140 has IP address information of the replication server 130. When the provider name server 140 receives an IP address of the replication server 130 to transmit the object included in the page from the local name server 120, the operator name server 140 selects a replication server 130 suitable for responding to the object request, and selects the corresponding replication server. The IP address of 130 is transmitted to the client 110 via the local name server 120.

In this case, the selection of the replication server 130 includes data traffic information of one or more replication servers including the replication server 130, local proximity information between the client 110 and one or more replication servers including the replication server 130, and the replication server ( One or more replication servers, including 130) are made in consideration of one or more pieces of object information stored in each.

The content server 160 stores a web page provided by a content provider and an embedded object included in the page, and transmits the page to the client 110 when a content request is received from the client 110. The server that acts.

The content provider of the present invention makes a contract with a plurality of CDN providers and transmits and stores an object included in a page from the content server 160 to a replication server held by each CDN provider. This is to allow a quick response through the replication server 130 when the client 110 requests a specific object.

In addition, when the content server 160 of the present invention receives an object included in the page from the client 110, the content server 160 refers to the location of the client 110 to transmit the object to the client 110 among a plurality of CDN providers. The appropriate CDN service provider is selected, and the URL information indicating the location where the selected CDN service provider stores the object is included in the HTTP 302 redirection message and transmitted to the client 110.

At this time, the content server 160 checks the location of the client 110 in consideration of, for example, the IP address of the client 110. In addition, a specific CDN provider is selected to provide an object to the client 110 by referring to a global network map including service area information of a plurality of CDN providers contracted with a content provider. The global network map may store, for example, contents of service area information of each CDN service provider, content information stored in the replication server 130 of each CDN service provider, and the like.

The content provider name server 150 is a kind of name server on the content provider side. When the content provider name server 150 receives an IP address of the content server 160 storing the page and the object included in the page from the local name server 120, the content provider name server 150 returns the corresponding IP address to the local name server 120. To be delivered to the client 110.

The network 170 transmits data and exchanges information between the client 110, the local name server 120, the replication server 130, the operator name server 140, the content provider name server 150, and the content server 160. Means a data communication network.

The configuration and operation of the content provider name server 150 according to an embodiment of the present invention will be described in more detail with reference to FIG. 2.

2 is a block diagram of the content server 160 shown in FIG. 1 according to an embodiment of the present invention. 1 and 2, the content server 160 according to the present exemplary embodiment includes a transceiver 210, a controller 220, a global network map database 230, and a content database 240.

The transceiver 210 has an interface for data transmission, message transmission and the like through the network 170.

The global network map database 230 includes service area information of a plurality of CDN providers contracted by a content provider, storage object information serviced by each CDN service provider, storage location URL information of objects stored by each CDN service provider, and each service area. A repository of global network map information including one or more of IP address information of a corresponding client.

The content database 240 is a page and a repository of objects contained in the page.

When the controller 220 receives a request for content from the client 110 through the transceiver 210, the controller 220 transmits a page included in the content database 240 to the client 110.

Thereafter, when the controller 220 receives a request for the object included in the page from the client 110 through the transceiver 210, the controller 220 determines the location of the client 110. The location of the client 110 is checked by checking the IP address of the client 110.

The controller 220 may refer to the identified location of the client 110 and the global network map information stored in the global network map database 230 to transmit a specific CDN to the client 110 to transmit an object included in a page among the plurality of CDN providers. Select a business operator. Thereafter, the controller 220 includes a URL indicating a corresponding object storage location of the selected CDN service provider in the HTTP 302 redirection message and transmits the URL to the client 110 through the transceiver 210.

Information of the global network map included in the global network map database 230 will be described in more detail with reference to FIG. 3.

3 is an example of global network map 300 information stored in the global network map database shown in FIG. 2 of the present invention. The global network map 300 is map information referred to by the content server 160 in the process of selecting a CDN service provider to respond to the object request of the client 110.

Referring to FIG. 3, the global network map 300 of the present embodiment includes continent information 310, country information 320, region information 330, CDN business information 340, storage object information 350, and object URL. 360 and a column of IP addresses 370.

The continental information 310 item is a field containing information of each continent of the world.

The country information 320 item is a field containing country information included in each continent.

The area information 330 item is a field containing detailed area information included in each country.

The CDN provider information 340 item is a field containing CDN provider information including a replication server 130 that can provide CDN service to each region.

The storage object information 350 item is a field containing content information stored in a replication server of a CDN service provider providing a CDN service in each region.

The object URL 360 item is a field containing object URL information indicating a location where each CDN service provider stores an object.

The IP address 370 item is a field containing IP address information of a terminal and the like located in each region of the region information 330.

Referring to the global network map 300, the country information 320 corresponding to the North American continent in the continental information 310 item includes a country such as the United States, Canada, .... In addition, it can be seen that the New York, California, ... etc. belong to the regional information 330 corresponding to the item of the national information 320 of the United States. In addition, the provider of the CDN provider information 340 corresponding to the New York state of the area information 330 is 'XXX', which is a provider that provides services to the New York State among the providers of CDN services for the content provider's contents. Indicates that it is 'XXX'. And referring to the storage object information 350, it can be seen that the objects stored in the replica server 130 of the 'XXX' operators that provide the CDN service to New York State 'AAA', 'BBB'.

Referring to the corresponding object URL 360 item, the URL indicating the location where the 'AAA' and 'BBB' objects held by the 'XXX' operators are stored is 'xxx.xxx.xxx/xxx'. In addition, referring to the IP address 370, the IP address of the terminal located in the state of New York is 'X.X.X'. In this case, 'X.X.X' represents one or more pieces of IP address information, and another IP address of the IP address 370 item also includes one or more pieces of IP address information.

If the client 110 located in the state of New York requests the object, the content server 160 receiving the object determines the location of the client 110 by using the IP address of the client 110 and the global network map. The IP address 370 of 300 retrieves an IP address that matches the IP address of the client 110.

The region corresponding to the searched IP address is searched with reference to the continental information 310, the country information 320, and the region information 330, and the CDN service provider 340 provides CDN service information providing services to the searched area. Search in the item.

Subsequently, the content held by the retrieved CDN service provider is searched in the storage object information 350 item. If there is an object that matches the object requested by the client 110, the URL corresponding to the searched object is searched in the object URL 360 item. In response, the HTTP 302 redirects the message to the client 110. On the contrary, if there is no content that matches the object contained in the page, the CDN service provider who selects the CDN service provider and retrieves the object URL in the HTTP 302 redirect message by searching whether the CDN service provider serving the neighboring area is storing the object. To the client 110.

Since other information included in the global network map 300 also contains the above information, a detailed description thereof will be omitted.

A content distribution process through a plurality of CDN providers according to an embodiment of the present invention will be described in more detail with reference to FIG. 4.

4 is a flowchart illustrating a content distribution method through a plurality of CDN providers according to an embodiment of the present invention. Referring to FIG. 4, the replication server 130 receives and stores an object included in a web page of a content provider from the content server 160 (S400). Content transmission in step S400, for example, when there is a request from the replication server 130, may be set to be made every time, when an object in the content server 160 is updated (update), etc. have.

Subsequently, when the browser of the client 110 receives a URL for requesting content from the content server 160, the resolver of the client 110 stores the page in the local name server 120. The IP address is queried (S405).

The local name server 120 that receives the IP address query of the content server 160 in step S405 uses the IP address of the content server 160 that stores the page as the content provider name server 150 that is the name server of the content provider. Query (S410).

The content provider name server 150 receiving the query in step S410 transmits the IP address of the content server 160 to the local name server 120 (S415), and receives the IP address of the content server 160. The local name server 120 transmits the IP address of the content server 160 to the client 110 (S420).

In step S420, the client 110, which has received the IP address of the content server 160, requests the content from the content server 160 using the content server 160 (S425), and the content server 160 sends the page to the client 110. Transmit to (S430).

The client 110 receiving the page in step S430 parses the page (S435). If the client 110 finds the URL of the object included in the page while parsing the page in step S435, it queries the local name server 120 for the IP address of the server storing the object included in the page. (S440).

Upon receiving the IP address query in step S440, the local name server 120 queries the content provider name server 150 for the IP address of the server storing the object (S445).

The content provider name server 150 receiving the IP address query in step S445 transmits the IP address of the content server 160 storing the object to the local name server 120 (S450) and the local name server 120. ) Transmits the IP address received in step S450 to the client 110 (S455).

The client 110, which has received the IP address of the content server 160 in step S455, requests the object included in the page from the content server 160 by using the same.

The content server 160 receiving the object request in step S460 refers to the location of the client 110 and selects a CDN provider to transmit the corresponding object among the plurality of CDN providers (S465), and stores the object of the selected CDN provider. The URL indicating the location is transmitted to the client 110 in the HTTP 302 redirect message (S470).

In step S465, for example, the location of the client 110 may be determined using the IP address information of the client 110. In operation S465, the CDN provider may be selected by referring to a global network map including at least one of service area information of the plurality of CDN providers and object information serviced by the plurality of CDN providers.

The client 110 receiving the HTTP 302 redirect message including the object storage location URL in step S470, queries the local name server 120 for the IP address of the replica server storing the object using the corresponding object URL ( In step S475, the local name server 120 that receives the IP address query in step S475 queries the provider name server 140, which is the name server of the CDN provider, to the IP address of the replica server that will transfer the object included in the page ( S480).

The operator name server 140 receiving the query in step S480 selects a replication server 130 to transmit the corresponding object to the client 110 among one or more replication servers (S485). In step S485, for example, one or more pieces of data traffic information of one or more replication servers, local proximity information between one or more replication servers and the client 110, and object information stored by each of the one or more replication servers are considered. By selecting the optimal replication server 130.

The operator name server 140 transmits the IP address of the replica server 130 storing the object to the local name server 120 (S490), and the local name server 120 receives the IP of the received replica server 130. The address is transmitted to the client 110 (S495).

The client 110 receiving the IP address in step S495 uses the request to the object included in the page to the replication server 130 (S500), and the replication server 130 sends the object to the client 110. It is transmitted to (S505).

According to the present invention, a content server can select a particular provider from among a plurality of CDN providers to provide an object included in a page, whereby a content provider has made a contract with a CDN provider who does not have a global network infrastructure. In this case, it is possible to quickly respond to the client's content request without a separate middle mile response delay.

1 is a block diagram of a content distribution system through a plurality of CDN operators according to an embodiment of the present invention.

FIG. 2 is a block diagram of a content provider name server shown in FIG. 1.

FIG. 3 is a configuration diagram of global network map information stored in the global network map database shown in FIG. 2.

4 is a flowchart illustrating a content distribution method according to an embodiment of the present invention.

Claims (14)

A storage step of receiving and storing an object included in a page from a content server by one or more replication servers of a plurality of content delivery network (CDN) providers; When the content server receives the request for the object from the client that has received the page, the CDN provider is selected from among the plurality of CDN providers with reference to the location of the client, and the object of the selected CDN provider is selected. A message transmission step of including a storage location uniform resource locator (URL) in a HyperText Transfer Protocol (HTTP) 302 redirection message to the client; And A specific replication server to transmit the object among the one or more replication servers in a business name server corresponding to the URL that receives the IP address query of the replication server storing the object from the local name server of the client side receiving the message. An address transmission step of transmitting the IP address of the server to the client via the local name server; Content distribution method through a plurality of CDN providers comprising a. The method of claim 1, wherein the message transmission step is And the content server refers to the location of the client by using the IP address information of the client. The method of claim 1, wherein the message transmission step is Wherein the content server selects a CDN service provider to which the object is to be transmitted by referring to a global network map including at least one of service area information of the plurality of CDN service providers and object information serviced by the plurality of CDN service providers. How to distribute content through CDN providers. The method of claim 1, wherein the address transfer step is In the service provider name server, at least one of data traffic information of the one or more replication servers, local proximity information between the one or more replication servers and clients, and object information stored by each of the one or more replication servers is considered. Content distribution method through a plurality of CDN providers, characterized in that for transmitting the IP address to the local name server.  One or more replication servers of a plurality of CDN providers for receiving and storing an object included in a page; Store the page and the object, and transmit and store the object to the one or more replication servers, transmit the page according to a client's request, and when the request for the object is received from the client, the location of the client A content server for selecting a CDN service provider to transmit the object from among the plurality of CDN service providers, and including the object storage location URL of the selected CDN service provider in an HTTP 302 redirect message to the client; And Receiving the IP address query of the replica server that stores the object from the local name server of the client that receives the message, the local name server is set to the IP address of a specific replica server to which the object is to be transmitted. A business name server corresponding to the URL to be transmitted to the client through the client; Content distribution system through a plurality of CDN operators comprising a. The method of claim 5, wherein the content server And a location of the client by using the IP address information of the client. The method of claim 5, wherein the content server A plurality of CDN providers, wherein the CDN providers are selected to be transmitted with reference to a global network map including at least one of service area information of the plurality of CDN providers and object information serviced by the plurality of CDN providers; Content distribution system through. The method of claim 5, wherein the service provider name server The IP address of the specific replication server may be determined based on at least one of data traffic information of the one or more replication servers, local proximity information between the one or more replication servers and clients, and object information stored by each of the one or more replication servers. Content distribution system through a plurality of CDN providers, characterized in that the transmission to the local name server. Transceiver for transmitting and receiving data; A content database storing a page and an object included in the page; A global network map database storing at least one of service area information of a plurality of CDN providers and the object information serviced by the plurality of CDN providers; And Send and store the object to one or more replication servers of the plurality of CDN operators through the transceiver unit, and transmit the page to the client when the page is requested from the client through the transceiver unit, the client through the transceiver unit When the object is requested from the client, a CDN service provider for transmitting the object is selected among the plurality of CDN service providers by referring to the location of the client and the information stored in the global network map database, and the object storage location URL of the selected CDN service provider is determined. A control unit for transmitting to the client in an HTTP 302 redirect message; Content server comprising a. The method of claim 9, wherein the control unit And the location of the client is referred to using the IP address information of the client. 10. The system of claim 9, wherein the global network map database is Content server, characterized in that further comprising IP address information corresponding to the service area of the plurality of CDN providers. The method of claim 11, wherein the control unit And a CDN service provider for transmitting the object by further referring to the IP address information. 10. The system of claim 9, wherein the global network map database is Content server, characterized in that further comprises a storage location URL information of each of the plurality of CDN operators. The method of claim 13, wherein the control unit The object storage location URL of the selected CDN service provider is included in the HTTP 302 redirection message with reference to the object storage location URL information of each of the plurality of CDN service providers included in the global network map database. Content Server.

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