Content popularity-based CCN cache partition and substitution method

Abstract

The invention discloses a content popularity-based CCN cache partition and substitution method, and belongs to the technical field of networks. Popularity of contents is taken into consideration on the basis of the traditional substitution method LRU, and contents with different popularity are partitioned for storage and substitution in node caches. According to the method, the contents with high and low popularity are stored separately according to the high and low popularity of the contents, so that the problem that the contents with low popularity are substituted by the contents with high popularity very soon due to a lower arrival rate is solved, the hit rate of the contents with low popularity is improved, an average hit distance for a user to acquire the contents with low popularity is reduced, and the network performance of the CCN is improved.

Description

technical field [0001] The invention belongs to the field of network technology, and more precisely, the invention relates to a method for replacing CCN cache partitions based on content popularity. Background technique [0002] Since the emergence of the Internet in the 1960s, the Internet has developed rapidly, and its application subjects have shifted from the initial hardware sharing to the sharing of information such as text, pictures, and videos. Users pay more attention to the speed, quality and security of content rather than where to get it. The existing host-centric network system has been difficult to meet the development needs of the Internet. Although improved technologies such as CDN and P2P have emerged, they still cannot overcome many inadaptability problems exposed by them. Therefore, it is inevitable to build a new network system, and under this background, the information-centric network (ICN: Information Centric Networking) came into being. [0003] The...

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Problems solved by technology

[0008] The purpose of the present invention is: the cache replacement strategy in the prior art does not take into account the characteristics of content-centricity and content popularity in CCN, so that the hit rate of low-popularity content is not high, and users obtain low popularity For the problem that the average hit distance of content is too far, a CCN cache partition replacement method based on content popularity is provided to improve the hit rate of low popularity content, reduce the average hit distance for users to obtain low popularity content, and improve the network of CCN performance

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