KR101104727B1 - System and method for content delivery using cache server and browser cache - Google Patents

Abstract

The present invention relates to a system and method for delivering content using a cache server and a browser cache, wherein the content server transmits and stores contents in one or more cache servers and one or more browser caches, which are data stores, and the management server includes one or more cache servers. Collects response speed between one or more clients and response speed between one or more browser caches and one or more clients.A client of one or more clients requests the IP address of a repository to transfer content to the provider name server, and is managed by the provider name server. Receiving the information collected by the server and returning the IP address of the storage to which the content is to be transmitted to a specific client. According to the present invention, an optimal storage is selected from a cache server and a browser cache storing the content. It may be the answer.

CDN, Cache Server, Replication Server, Ghost Server, Browser Cache

Description

System and method for content delivery using cache server and browser cache}

The present invention relates to a content delivery system and method, in particular, when there is a content request from a client, at least one CDN (Content Delivery Network) cache server (storage server) and one or more browser cache that stores the content, the client, The present invention relates to a content delivery system and method using a cache server and a browser cache to allow transmission of corresponding content from a specific storage in consideration of a response speed.

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 was 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 (hereinafter referred to as a cache server).

However, it is expensive and time-consuming for CDN operators to install and operate cache servers with capacity and response time that clients can satisfy in all regions of the world. In addition, the currently commercialized CDN service designates a cache server corresponding to the IP (Internet Protocol) address of the client, and if there is a content request from the client, checks whether the corresponding content is stored in the corresponding cache server, and is not stored. If not, it uses a method of sending a request to a content server.

However, there is a problem that if a specific content is not stored in the cache server corresponding to the client, content requests are crowded to the origin content server providing the content. . Accordingly, there is a need for a method capable of providing content requested from a client without adding a cache server.

The present invention has been proposed to solve the above-described problems, and when there is a content request from a client, a response speed between the client and one or more cache servers storing the content and a response between the browser cache belonging to the client and another client It is an object of the present invention to provide a content delivery system and method using a cache server and a browser cache to transmit the corresponding content in an optimal storage in consideration of speed.

Content delivery method using the cache server and the browser cache of the present invention for achieving the above object, the storage step of transmitting and storing the content in one or more cache servers and one or more browser cache, the content server, the management server Collecting the response speed between the one or more cache servers and one or more clients and the response speed information between the one or more browser caches and the one or more clients, wherein a specific client of the one or more clients transmits the contents to a business name server. A requesting step of requesting an Internet Protocol (IP) address of the storage, and a returning step of receiving, by the operator name server, information collected from the management server and returning the IP address of the storage to which the content is to be transmitted to the specific client; .

In the content transmission method using the cache server and the browser cache of the present invention, the storing step is characterized in that for storing the content transmitted by the content server in response to the content request from any client.

In the content transmission method using the cache server and the browser cache of the present invention, the storing step is characterized in that for transmitting and storing the content in advance having a relatively high request frequency compared to other content.

In the content transmission method using the cache server and the browser cache of the present invention, the storing step is characterized in that for transmitting in advance the content that is expected from the specific client to store.

In the content transmission method using the cache server and the browser cache of the present invention, the collecting step, characterized in that the management server collects the response speed information between the one or more cache servers and the one or more locally adjacent clients.

In the content transmission method using the cache server and the browser cache of the present invention, the collecting step, the browser cache group including the browser cache of the particular client of the browser cache group grouped by the management server including a plurality of browser cache Collecting response speed information between the one or more browser caches belonging to the client.

In the content transmission method using the cache server and the browser cache of the present invention, in the collecting step, the browser cache group is characterized by grouping the plurality of locally cached browser cache.

In the content transmission method using the cache server and the browser cache of the present invention, in the collecting step, the browser cache group is characterized by grouping to include the browser cache overlapping with other browser cache group.

In the content transmission method using the cache server and the browser cache of the present invention, the collecting step is characterized in that for collecting the response speed information by measuring the response speed at a predetermined measurement time.

In the content transmission method using the cache server and the browser cache of the present invention, the collecting step, characterized in that for collecting the response speed information by measuring the response speed according to a predetermined measurement period.

In the content transmission method using the cache server and the browser cache of the present invention, the returning step is characterized by returning the IP address of the storage in consideration of the load on the network.

In the content transmission method using the cache server and the browser cache of the present invention, the returning step is characterized in that to return the IP address of the storage having the fastest response speed of the above-referenced information.

Content delivery system using the cache server and the browser cache of the present invention for achieving the above object, one or more caches to receive and store the content from the content server and to send to the client when there is a request for the content from the client A server, a management server for collecting and storing response speed information between the one or more cache servers and one or more clients and one or more browser caches and the one or more clients, and a storage for transmitting the content from a specific client of the one or more clients. And a service provider name server that receives the information collected by the management server and returns the IP address of the storage to which the content is to be transmitted to the specific client when the IP address is requested.

In the content delivery system using the cache server and the browser cache of the present invention, the management server is the one belonging to the browser cache group including the browser cache of the specific client of the group of browser cache grouped by including a plurality of browser cache Collecting the response speed of the above-mentioned browser cache and the specific client.

The management server of the present invention for achieving the above object, the input and output unit for transmitting and receiving data, the response speed between the one or more clients and one or more cache server that stores the content and the one or more clients and the content stored one or more A database unit having response speed information between browser caches, and a control unit which collects the response speed information through the input / output unit, stores the response speed information, and provides the response speed information stored in the database unit to the operator name server through the input / output unit. Include.

In the management server of the present invention, the controller selects a store to provide the content to a specific client by referring to the response speed information stored in the database unit, and provides the selected store information to the operator name server through the input / output unit. Characterized in that.

According to the present invention, in consideration of the response speed between the cache server and the browser cache storing the content and the client requesting the content, the content can be transmitted from an optimal storage having a better network or faster response time. It is possible to promote the efficient use and user convenience.

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 delivery system according to an embodiment of the present invention. Referring to Figure 1, the content delivery system of the present embodiment is the first client to the n-th client (110-1, ..., 110-n), the first browser cache to the n-th browser cache (120-1, .. , 120-n), the operator name server 130, the first to n-th cache server (140-1, ..., 140-n), the content server 150, the network 160 and the management server And 170.

The first to nth clients 110-1,..., And 110-n refer to a terminal such as a computer that receives information from a server connected to the network 160. When the first client to the n-th client 110-1,..., 110-n receives a Uniform Resource Locater (URL) for requesting specific content from a browser, a DNS (Domain Name Server) Content server 150 or first cache server to n-th cache server (140-1, ..., 140) to access the name server 130 having a function of the (access) to provide the domain name corresponding content; -n) It converts to the cache server's IP address and connects to the server corresponding to the IP address.

The first browser cache to n-th browser caches 120-1 to 120-n are browsers of the first to n-th clients 110-1 to 110-n, respectively. The content repository corresponding to. That is, when each browser receives a specific content from the content server 150 or any one of the first cache server to n-th cache server (140-1, ..., 140-n), the first browser cache From the n-th browser cache (120-1, ..., 120-n) is stored in the browser cache of the corresponding client, and used to display through the browser window.

The operator name server 130 refers to a DNS (Domain Name Server) for converting a domain name into an IP address, and converts a symbolic name to a numeric address used by a machine to inform the name server. It is a kind. The operator name server 130 is operated by the CDN provider to provide a CDN service.

The first to n-th cache servers 140-1,..., 140-n are called, for example, a copy server or a ghost server, and the content server 150. Is a repository for storing copies of content data that is stored and managed. The first to n-th cache servers 140-1 to 140-n are contents from any one of the first to n-th clients 110-1 to 110-n. When requested, it responds quickly and delivers the content.

The content server 150 stores a web page and an object provided by the content provider, and then stores the web page and the object from one of the first to n-th clients 110-1,..., 110-n. Server that responds to content requests. That is, the content server 150 serves to transmit content requested from a specific client, and some of the contents held by the content server 150 are stored in the first to n th cache servers 140-1, ..., 140-n) to be transmitted to one or more cache servers for storage. Through this, the first cache server to the n-th cache server (140-1, ..., 140-n) it is possible to quickly provide the content according to the request of the specific client.

The management server 170 is between the first cache server to n-th cache server (140-1, ..., 140-n) and the first client to n-th client (110-1, ..., 110-n) Response speed and response speed between the first browser cache to n-th browser cache 120-1, ..., 120-n and the first client to n-th client 110-1, ..., 110-n Measure and store.

When the management server 170 collects response speed information, for example, it is possible to set a specific measurement time and collect the information by measuring the response speed at the corresponding set time, and to measure the response period of the response speed. It can be set and collect the information by measuring the response speed accordingly.

The network 160 includes a first client to an n-th client 110-1, ..., 110-n, a business name server 130, a first cache server to an n-th cache server 140-1, ... , 140-n) refers to a data communication network for data transmission and information exchange between the content server 150 and the management server 170.

When a URL for a content request is input to a browser of any one of the first to n th clients 110-1,..., 110-n, the corresponding name is transmitted to the operator name server 130 via a local name server. You will be asked for the IP address of the repository to transfer the content to.

At this time, if the client requesting the specific content is, for example, the first client 110-1, the management server 170 is the first client 110-1 and the first cache server to n-th cache server 140-. Response speed between 1, ..., 140-n, and response speed information between the first client 110-1 and the second browser cache to n-th browser cache 120-2, ..., 120-n Since the operator name server 130 receives the information from the management server 170 to select the storage to transmit the content, and returns the IP address of the storage to the first client (110-1).

At this time, for example, the operator name server 130 may receive the response speed information collected by the management server 170 and return an IP address of an optimal storage to transmit the content. In addition, the optimal storage is selected using the response speed information or the response speed information collected by the management server 170, and the selected storage information is transmitted to the operator name server 130 so that the IP address information of the selected storage is the first client. It may be returned to (110-1).

Returning the IP address of the storage to which the content is to be transmitted, for example, the operator name server 130 returns the IP address of the relatively low load to the first client 110-1 in consideration of the network load of each storage. It may be done in a manner.

In one embodiment of the present invention, the first browser cache (120-1) in the first client (110-1), and the second browser cache to n-th browser cache (120-2, ..., ... 120-n) may be a browser cache grouped to belong to the same browser cache group. For example, the first to n-th browser caches 120-1, ..., 120-n grouped into the same group may be browser caches within a client that are locally adjacent to each other, which may be a locally cached client or This is because the response speed between browser caches is generally fast.

In this case, the browser cache included in each group may be grouped so as not to overlap each other, and some browser caches may be grouped in overlapping manner so that they belong to different groups.

The configuration and operation of the management server 170 according to an embodiment of the present invention will be described in more detail with reference to FIG. 2.

2 is a configuration diagram of the management server 170 shown in FIG. 1 according to an embodiment of the present invention. 2, the management server 170 according to the present exemplary embodiment includes an input / output unit 210, a controller 220, and a database unit 230.

The input / output unit 210 has an interface for transmitting and receiving data through the network 160.

The database unit 230 may be configured between the first to n-th cache servers 140-1 to 140-n and the first to n-th clients 110-1 to 110-n. Response speed information and response between the first browser cache to n-th browser cache 120-1, ..., 120-n and the first client to n-th client 110-1, ..., 110-n Repository that holds speed information.

The control unit 220 through the input and output unit 210, the first cache server to n-th cache server (140-1, ..., 140-n) and the first client to n-th client (110-1, .. , 110-n) response speed information, and one or more browser caches of the first browser cache to n-th browser cache 120-1, ..., 120-n and the first client to n-th client 110-n. 1, ..., 110-n) collects the response speed information, and serves to store in the database unit 230.

In addition, the controller 220 receives a request for response speed information between the storage storing the content requested from a specific client and the corresponding client from the operator name server 130 through the input / output unit 210, the database unit 230. The response speed information stored in the client and the store serves to provide the service provider name server 130 through the input and output unit 210. In another embodiment of the present invention, the controller 220 refers to the response speed information stored in the database unit 230 to select the optimal storage to provide the content, and provides the information of the selected storage to the operator name server 130 You may. In this case, the selected storage may be a storage having the fastest response speed among the corresponding clients.

Information held by the database unit 230 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 5.

3 is an exemplary diagram of a browser cache group table 310 and a link information table 320 stored in the database unit 230 of FIG. 2 according to an embodiment of the present invention.

Referring to the browser cache group table 310 in FIG. 3, the client IP address and the browser cache group item are configured. The link information table 320 also consists of a browser cache group, a client IP address, and a stored content item.

In the browser cache group table 310, a client IP address item is a field including IP address information corresponding to each client. The browser cache group item is a field including information of the browser cache group to which the browser cache corresponding to each client IP address belongs.

In the link information table 320, the browser cache group item is an information field linked to each browser cache group item in the browser cache group table 310, and the link of the information is, for example, a linked list. It may be made in the form of). The Client IP Address field is a field containing IP address information of clients belonging to each browser cache group. The stored content item is a field indicating information of content stored in the browser cache of each client.

Referring to the browser cache group table 310, it can be seen that the browser cache of the client whose IP address is '111.111.111.110' belongs to the first group. In the items of the link information table 320 linked to the first group item, the client IP addresses of the browser cache belonging to the first group are '111.111.111.110', '111.111.111.111', '111.111.111.112', ... It can be seen that.

At this time, the contents stored in the browser cache of the client whose IP address is '111.111.111.110' are 'image1.gif' and 'image2.gif'. Similarly, the image of the client having the IP address of '111.111.111.111' is 'image1.' You can see that the contents of '.gif' and 'image3.gif' are stored and the contents of 'image2.gif' and 'image3.gif' are stored in the browser cache of the client whose IP address is '111.111.111.112'. have.

When the operator name server 130 receives a request for the IP address of the storage that stores the content of 'image3.gif' from the client whose IP address is '111.111.111.110', it requests the response speed information to the management server 170. .

Accordingly, the management server 170 stores the corresponding content, response speed information between the browser cache of the client having the IP address' 111.111.111.111 'and the client having the IP address' 111.111.111.110', and the IP address' 111.111. The response speed information between the browser cache of the client having 111.112 'and the client having the IP address of' 111.111.111.110 'is needed.

A process of providing the corresponding response speed information to the operator name server 130 by the controller 220 of the management server 170 with reference to the response speed information stored in the database 230 will be described with reference to FIGS. 4 and 5. Let's do it.

4 and 5 are exemplary diagrams of the first response speed information table 400 and the second response speed information table 500 stored in the database unit 230 of FIG. 2 according to an embodiment of the present invention. In the present embodiment, the first response rate table 400 includes response rate information between the client and another client browser cache, and the second response rate table 500 includes response rate information between the client and the cache server.

Referring to FIG. 4, the first response rate information table 400 includes a client IP address, an IP address of another client, and a response rate.

The client IP address item is a field containing IP address information of a client requesting content. The IP address item of another client is a field including IP address information corresponding to the browser cache of another client belonging to the browser cache group such as the browser cache of the specific client. The response rate field is a field that contains response rate information between each client and the browser cache belonging to another client.

In the first response rate information table 400, IP addresses of other client browser caches belonging to the same browser cache group as the client browser cache of the IP address '111.111.111.110' are '111.111.111.111' and '111.111.111.112' , ... etc. The response speed between the client of the IP address '111.111.111.110' and the client browser cache corresponding to the IP address '111.111.111.111' is '1 ms', and the client of the IP address '111.111.111.110' and the IP address '111.111.111.111' It can be seen that the response speed between the corresponding client browser cache is '2 ms'.

For example, a client with an IP address of '111.111.111.110' requests an IP address of a repository that stores content of 'image3.gif', and the IP address of the browser cache that stores the content is '111.111.111.111' and If it is '111.111.111.112', the most responsive browser cache is the client's browser cache whose IP address is '111.111.111.111'.

The response speed between the client with the IP address '111.111.111.110' and the client browser cache with the IP address '111.111.111.111' is the client and cache server 140-1, ... , It is to be compared with the response speed between 140-n), the process will be described in more detail with reference to FIG.

Referring to FIG. 5, the second response rate information table 500 includes a cache server, stored content, a client IP address, and a response rate.

The cache server item is a field containing information of a cache server storing content. The stored content item is a field including information of content stored by each cache server. The Client IP Address field is a field containing IP address information of the client whose response rate is to be measured. The response rate field is a field containing response rate information between each cache server and each client.

Referring to the second response rate information table 500, contents stored in the first cache server 140-1 are 'image1.gif' and 'image3.gif', and the first cache server 140-1 and the IP It can be seen that the response speed between the clients having the address '111.111.111.110' is '1.5 ms' and the response speed between the first cache server and the client having the IP address '111.111.111.111' is '1 ms'.

Similarly, the contents stored in the second cache server 140-2 are 'image2.gif' and 'image3.gif', and the response between the second cache server 140-2 and the client whose IP address is '111.111.111.110' It can be seen that the speed is '2 ms' and the response speed between the second cache server and the client having the IP address '111.111.111.111' is '3 ms'.

For example, a client having an IP address of '111.111.111.110' requests an operator's name server 130 for an IP address of a store storing 'image3.gif', so that the operator's name server 130 manages the management server 170. When requesting the response rate information, the control unit 220 of the management server 170 stores the content of 'image3.gif' in the database unit 230, and responds with the client whose IP address is '111.111.111.110'. It is confirmed that the response speed of the fastest first cache server is '1.5 ms'.

Thereafter, the management server 170 has a response speed of '1.5 ms' between the client having the IP address '111.111.111.110' and the first cache server 140-1, and as described with reference to FIG. Since the response speed between the client having the 111.111.111.110 'and the client browser cache having the IP address' 111.111.111.111' is' 1 ms', the response of the client browser cache having the IP address' 111.111.111.111 'to the operator name server 170 is given. Rate information is provided so that the IP address of the browser cache is sent to the client with an IP address of '111.111.111.110'.

In another embodiment of the present invention, the management server 170 sends the response speed information between the client having the IP address of '111.111.111.110' and one or more stores storing the contents of 'image3.gif' to the operator name server 130. By transmitting, the operator name server 130 may directly select the storage to transmit the content of the 'image3.gif' and transmit the IP address information of the storage to the client having the IP address of '111.111.111.110'.

A content providing process according to an embodiment of the present invention will be described in more detail with reference to FIG. 6.

6 is a flowchart illustrating a content transmission method according to an embodiment of the present invention. 1 and 6, first, the specific server transmits and stores specific content from the content server 150 to the cache servers 140-1,..., 140-n (S610). In addition, the content server 150 transmits and stores the corresponding content to one or more browser caches including the second browser cache 120-2 (S620).

In step S620, the browser cache for receiving and storing content may be, for example, a browser cache grouped into a plurality of browser caches. The grouping may be performed by grouping a plurality of locally adjacent browser caches into one group. Can be done.

Content transmission and storage in the step (S610) and step (S620), the content server 150 may be made in a manner to store the content that is transmitted in response to the content request from a particular client.

In addition, the content transmission and storage in the step (S610) and the step (S620), the content of the content stored in the content server 150, the content of which the request frequency is relatively high compared to the other content or the content is expected from the client, It may be made in such a manner that the request is transmitted and stored before the request from the specific client.

The management server 170 is a response speed between one or more clients including the first client (110-1) and the cache server (140-1, ..., 140-n) irrespective of the step (S610) and step (S620) , And measures and stores the response speed between one or more clients including the first client 110-1 and one or more browser caches including the second browser cache 120-2 (S630).

Measurement of the response speed in step S630 may be made at a predetermined measurement time, or may be made according to a predetermined measurement period.

At this time, the response speed measurement, for example, the operator name server 130 transmits the IP address of the cache server 140 or IP address information of the client corresponding to each browser cache to the first client (110-1). After the first client 110-1 transmits a message for calculating a response speed to each of the corresponding stores to receive a response, the management server 170 receives the required round trip time (RTT) information. Could be done with.

The first client 110-1 transmits the IP address of the store to which the corresponding content is transmitted to the first client 110-1 among the stores in which the contents are stored in steps S610 and S620, to the operator name server 130. Request (S640).

The operator name server 130 receiving the IP address request in step S640 requests the management server for response speed information of the storage to which the content is transmitted to the first client 110-1 (S650).

The management server 170 receiving the response speed information request in step S650 refers to the response speed information stored in the database, and transmits the response speed information of the storage storing the corresponding content to the operator name server 130 (S660). ). In step S660, instead of transmitting the response speed information, for example, an optimal storage for transmitting the content to the first client 110-1 among the storages of the corresponding contents is selected, and the selected storage information is selected. It may be transmitted to the business name server 130. In this case, the optimal storage selection may be performed by selecting the storage having the fastest response speed between the first clients 110-1, for example.

The operator name server 130 that has received the response rate information in step S660 returns the IP address of the storage to which the content is to be transmitted to the first client (S670). At this time, the specific storage may be selected in consideration of the load of the network. For example, when the repository having the fastest response speed with the first client 110-1 is the second browser cache 120-2 belonging to the second client 110-2, the second client 110-2 is used. IP address information is returned to the first client 110-1. In this case, as described above, the browser cache 120-1 and the second browser cache 120-2 of the first client 110-1 may be browser caches belonging to the same browser cache group.

In operation S670, the first client 110-1 that receives the IP address corresponding to the second browser cache 120-2 requests a content by accessing the IP address at operation S680 and the second browser cache. The content is received from the device 120-2 (S690). Content delivery in step S690 may be, for example, in a peer to peer (P2P) manner.

According to the present invention, in consideration of the response speed of the cache server and the browser cache storing the content requested from the client, it is possible to transmit the corresponding content in an optimal storage having a better network condition or faster response time. Through this, it is possible to quickly respond to content requests from clients without expanding and operating a cache server to provide CDN services, thereby distributing content requests to the cache server and content server, CDN service providers and The convenience of the user can be enhanced.

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

2 is a block diagram of the management server shown in FIG.

3 is an exemplary diagram of a browser cache group table and a link information table stored in the database unit of FIG. 2.

4 is an exemplary diagram of a first response speed information table stored in the database unit of FIG. 2.

5 is an exemplary diagram of a second response speed information table stored in the database unit of FIG. 2.

6 is a flowchart illustrating a content transmission method according to an embodiment of the present invention.

Claims (16)

A storage step of transmitting and storing contents in one or more cache servers and one or more browser caches in which the content server is a data store; A collection step of collecting, by a management server, response speed between the one or more cache servers and one or more clients and response speed information between the one or more browser caches and the one or more clients; Requesting, by a specific client of the one or more clients, an IP address of a storage for transmitting the content to a business name server; And A return step of receiving, by the operator name server, the information collected by the management server and returning the IP address of the storage to which the content is to be transmitted to the specific client; Content delivery method using a cache server and browser cache comprising a. The method of claim 1, wherein the storing step And a cache server and a browser cache, wherein the content server stores the content transmitted in response to a content request from an arbitrary client. The method of claim 1, wherein the storing step A content transmission method using a cache server and a browser cache, characterized in that for transmitting and storing the content in advance, the request frequency is relatively higher than other content. The method of claim 1, wherein the storing step And a cache server and a browser cache, characterized in that for transmitting and storing the content expected to request from the specific client in advance. The method of claim 1, wherein the collecting step And the management server collects response rate information between the one or more cache servers and the one or more clients that are locally adjacent to each other. The method of claim 1, wherein the collecting step Response rate information of the one or more browser caches belonging to the browser cache group including the browser cache of the specific client among the group of browser caches grouped by the management server including a plurality of browser caches Content delivery method using a cache server and browser cache, characterized in that to collect. The method of claim 6, wherein in the collecting step And the browser cache group groups the plurality of browser caches that are locally adjacent to each other. The method of claim 7, wherein in the collecting step The browser cache group is a content delivery method using a cache server and a browser cache, characterized by grouping to include the browser cache overlapping with other browser cache group. The method of claim 1, wherein the collecting step Content response method using a cache server and a browser cache, characterized in that for collecting the response speed information by measuring the response speed at a predetermined measurement time. The method of claim 1, wherein the collecting step Content response method using a cache server and a browser cache, characterized in that for collecting the response speed information by measuring the response speed according to a predetermined measurement period. The method of claim 1, wherein the returning step Returning the IP address of the storage in consideration of the load on the network, characterized in that the content transfer method using a cache server and browser cache. The method of claim 1, wherein the returning step A method of transmitting content using a cache server and a browser cache, comprising: returning an IP address of a storage having the fastest response speed with reference to a response speed received from the management server. At least one cache server receiving and storing content from a content server and transmitting the content to the client when a request for the content is received from a client; A management server for collecting and storing response speed information between the one or more cache servers and one or more clients and response speed information between the one or more browser caches and the one or more clients; And A service provider name server which receives the information collected by the management server and returns the IP address of the storage to which the content is transmitted to the specific client when the IP address of the storage to which the content is to be transmitted is requested from the specific client among the one or more clients; Content delivery system using a cache server and browser cache comprising a. The method of claim 13, wherein the management server A cache server for collecting a response speed between the one or more browser caches belonging to the browser cache group including the browser cache of the specific client among the group of browser caches including the plurality of browser caches; Content delivery system using browser cache. Input and output unit for transmitting and receiving data; A database unit having response speed information between at least one client and at least one cache server storing content and response speed information between the at least one client and at least one browser cache storing the content; And A control unit for collecting the response speed information through the input / output unit and storing the response speed information and providing the response speed information stored in the database unit to the operator name server through the input / output unit; Management server comprising a. The method of claim 15, wherein A storage server for providing the contents to a specific client by referring to the response speed information stored in the database, and providing the selected storage information to the operator name server through the input / output unit.

Images