CONTENTS PROVIDER PARTICIPATION TYPE CONTENTS DELIVERY SYSTEM AND METHOD, AND CONTENTS DELIVERY NETWORK DOMAIN NAME SYSTEM SERVER THEREOF

• US 20100042725A1
• Filed: 08/12/2009
• Published: 02/18/2010
• Est. Priority Date: 08/13/2008
• Status: Abandoned Application

• Current Assignee: SK Planet Co., Ltd. (SK Telecom Co., Ltd.)
• Original Assignee: SK Telecom Co., Ltd.
• Inventors: JEON, Jae Sic, KIM, Kyong Hwan
• Application Number:
  US12/540,270
• Publication Number:
  US 20100042725A1
• Time in Patent Office: Days
• US Class Current: 709/226
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/1021 based on client or server locations
• CPC Class Codes: H04L 67/1034 Reaction to server failures by a load balancer

Abstract

A CP participated contents delivery system and method, and a CDN DNS server of the system are provided. When a client detects an embedded object while parsing a page received from a web server, the client inquires of a local DNS server about the IP address of a server storing the object. The local DNS server receives the inquiry of the client and inquires of a CDN DNS server about the IP address of the server storing the object. The CDN DNS server selects a server located in proximity to the client from a host server of a CDN provider, which stores the object, and the web server. The selected server transmits the object to the client. Accordingly, the client can rapidly receive the object and a contents provider can promote qualitative contents providing service improvement.

Claims

1. A contents provider (CP) participated contents delivery system comprising:

at least one host server receiving and storing an object embedded in a page and transmitting the object to a client at the request of the client;

a web server storing the page and the object, transmitting the object to the at least one host server such that the at least one host server stores the object, and transmitting the page or the object to the client at the request of the client; and

a CDN DNS server selecting a server located in proximity to the client from the at least one host server and the web server and transmitting the IP address of the selected server to the client through a local DNS server at the client when inquiry about the IP address of a server storing the object is received from the local DNS server.

2. The CP participated contents delivery system of claim 1, wherein the CDN DNS server selects the server located in proximity to the client with reference to the IP address of the client.

3. The CP participated contents delivery system of claim 1, wherein the CDN DNS server selects another server located in proximity to the client when the data traffic of the selected server exceeds a critical value.

4. A CDN DNS server comprising:

a transmitting/receiving unit for transmitting/receiving data;

a database storing IP addresses of at least one host server storing an object embedded in a page and a web server providing the page and the object;

a determination module determining proximity of an arbitrary client to at least one of the at least one host server and the web server; and

a controller selecting a specific server which will transmit the object to the client receiving the page through the transmitting/receiving unit from the at least one host server and the web server with reference to the determination result of the determination module and transmitting the IP address of the specific server to the client through the transmitting/receiving unit via a local DNS server at the client with reference to the IP addresses stored in the database when inquiry of the local DNS server about the IP address of a server storing the object is received.

5. The CDN DNS server of claim 4, wherein the determination module determines the proximity of the client to at least one of the at least one host server and the web server with reference to the IP address of the client.

6. The CDN DNS server of claim 4, wherein the controller selects another server located in proximity to the client when data traffic of the selected server exceeds a critical value.

7. A CP participated contents delivery method comprising:

a storing step in which at least one host server receives an object embedded in a page from a web server and stores the object embedded in the page;

a page transmitting step in which the web server requested by a client to provide the page transmits the page to the client; and

an address transmitting step in which a CDN DNS server selects a server located in proximity to the client from the at least one host server and the web server and transmits the IP address of the selected server to the client through the local DNS server when receiving inquiry about the IP address of a server storing the object is received from a local DNS server at the client receiving the page.

8. The CP participated contents delivery method of claim 7, wherein, in the address transmitting step, the CDN DNS server selects the server with reference to the IP address of the client.

9. The CP participated contents delivery method of claim 7, wherein the address transmitting step in which the CDN DNS server receives the inquiry about the IP address of the server storing the object comprises a step in which the client inquires of the local DNS server about the IP address of the server storing the object by using a URL representing the position of the object detected while receiving and parsing the page.

10. The CP participated contents delivery method of claim 8, wherein the address transmitting step in which the CDN DNS server receives the inquiry about the IP address of the server storing the object comprises a step in which the local DNS server, which receives the inquiry of the client about the IP address, inquires of a contents provider DNS server about the IP address of the server storing the object, receives domain name information of a CDN provider from the contents provider DNS server and inquires of the CDN DNS server about the IP address of the server storing the object.

11. The CP participated contents delivery method of claim 8, wherein the domain name information received by the local DNS server is included in a canonical name (CNAME) record and received.