Method of CDN to actively select high quality nodes in advance to conduct optimizing content distribution service

Abstract

The invention belongs to the technical field of network multimedia, and particularly discloses a method of a CDN (content distribution network) to actively select high quality nodes in advance to conduct an optimizing content distribution service. The method comprises the steps that an amplification layer is added in an overlay network; a CDN server selects a certain number of high quality nodes through information obtained from peer nodes to serve as nodes of the amplification layer; when system performances are poor or service ability is limited, the CDN services the high quality nodes directly and preferentially but does not service common nodes blindly; and the high quality nodes service the common nodes continuously, so that stream media data is spread more efficiently. With the adoption of the mode, the CDN can cooperate with a P2P (Peer to Peer) system, a VOD (video on demand) system and the like more efficiently. The method operates stably after probation; a result proves that compared with the existing traditional CDN-P2P mixed architecture, the performance is improved by at least 10-25%; and experimental comparison indexes comprise start-up delay, play quality and play delay.

Description

technical field [0001] The invention belongs to the technical field of network multimedia, and specifically relates to a method for a CDN oriented to a new generation of Internet environment to actively select high-quality nodes in advance to carry out efficient and optimized content distribution services. Background technique [0002] The digital content industry occupies a very important position in the application of the next generation IP network. In the new generation of Internet, with the development of broadband, Internet applications have shifted from simple Web browsing to comprehensive applications centered on rich content. The distribution services of rich media content will account for an increasing proportion. Streaming media, IPTV, Applications such as large file downloads and high-definition video have gradually become the mainstream of broadband applications. According to Cisco's 2010 video network survey report, video traffic accounted for one-third of the ...

AI Technical Summary

Problems solved by technology

However, constrained by the computing model, both have their own advantages, and both have some fundamental shortcomings: the high cost and high complexity of CDN restrict its ability to expand, while P2P has advantages in network friendliness, reliability and manageability. big problem

In this patent, whether the request of the P2P node is served by the edge server or by the P2P network depends on the specific load and traffic conditions of the network, and the CDN node cannot actively and optimally select the Peer node to selectively provide services

Images