Content downloading, pre-storing and replacing method of CDN-P2P network based on edge cache

Abstract

The invention belongs to the field of content distribution networks in the wireless communication technology, and particularly relates to a CDN-P2P network content downloading, pre-storing and replacing method based on edge caching, so as to solve the technical problem that the storage space of an edge cache node cannot be utilized to the maximum extent due to network overhead and downloading time delay caused by excessive pressure of a server due to downloading, pre-storing and replacing methods in the existing network. The content downloading and pre-storing method of the CDN-P2P network based on the edge cache comprises the following steps: S1, enabling a user to request to download a file a; S2, dividing all the files stored in the edge CDN server into a plurality of classes according to contents, and sorting the various files in advance according to popularity; S3, according to the interest-correlation degree, the support degree and the confidence degree with the file a in the edge CDN server, finding out a same-type file b most related to the file a; and requesting a pre-stored file b according to the pre-stored utility of the file a and the file b of the same type; S4, pre-storing the file b.

Description

technical field [0001] The invention belongs to the field of content distribution network in the wireless communication technology, and in particular relates to a content downloading, pre-storing and replacing method of a CDN-P2P network based on edge cache. Background technique [0002] In recent years, with the explosive growth of networks and their users, the stable and continuous delivery of streaming content to large-scale users has become a hot topic of research, both in academia and industry. In this situation, multimedia streaming applications emerge as the times require, and people can obtain multimedia content anytime and anywhere through the Internet. Under the above problems, content delivery network (CDN, Content Delivery Network) and peer-to-peer network (P2P, Peer-to-Peer) have received extensive attention. [0003] Content distribution network is a layer of intelligent virtual network based on the existing Internet. On the one hand, it transmits the content...

AI Technical Summary

Problems solved by technology

The existing hybrid CDN-P2P network reuses network resources during content download, content pre-storage, request redirection, and content replacement, which has the problems of large network overhead, download delay, and large space occupation. At the same time, it is easy to cause backbone network congestion.

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