Contents provider participation type contents delivery system and method, and contents delivery network domain name system server thereof

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.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a contents delivery network (CDN) including globally deployed replica servers, and more particularly, to a contents provider (CP) participated contents delivery system and method for allowing a web server of a CP to function as a replica server of a CDN for a client located in proximity to the web server to directly provide contents to the client, and a CDN domain name system (DNS) server of the system.[0003]2. Description of the Related Art[0004]A web server of a contents provider (CP) generally provides a large number of contents (for example, videos, music, files, etc.) to clients. A large load is generated when the web server provides the whole or some of the contents to a plurality of clients one to one because the plurality of clients exist in a plurality of Internet service providers (ISPs) while the web server is connected to a single ISP.[0005]Accordingly, traffic between ISPs e...

AI Technical Summary

Benefits of technology

[0013]An object of the present invention is to allow a DNS server of a CDN provider to perform routing such that a web server operated by a contents provider to directly provide contents such as page embodied objects to a client who requests the contents through a network of the CDN provider when the client is located in proximity to the web server so as to provide improved quality of service (QoS) to the client and decrease useless network load.

Problems solved by technology

A large load is generated when the web server provides the whole or some of the contents to a plurality of clients one to one because the plurality of clients exist in a plurality of Internet service providers (ISPs) while the web server is connected to a single ISP.

Accordingly, traffic between ISPs exponentially increases as the number of contents providers and clients increase, and thus transmission delay and / or transmission failure rate due to traffic congestion increase.

Web server fail-over may occur in the worst case.

Although general DNS-based request routing has a problem that network latency according to DNS look-up time is aggravated, the '703 patent decreases network latency by constructing hierarchical DNS servers.

However, even when the client is located in proximity to the web server of the contents provider, that is, when the client and the web server of the contents provider are close to each other geographically or on a network route, the DNS-based request routing is performed, which is inefficient.

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