Collaborative caching method and system based on content popularity and node centrality

Abstract

The invention discloses a collaborative caching method based on content popularity and node centrality, and belongs to the technical field of content center networks. The method comprises the following steps: firstly, calculating the node centrality of each routing node; calculating real-time content popularity of all content objects passing through the node in each routing node, and dividing thecontent objects into popular content and non-popular content according to the real-time content popularity; caching the popular content to a core routing node with the maximum node centrality in a content return path and a next hop routing node of the core routing node; and finally, caching the non-popular content on a non-core routing node in a content return path, wherein the coefficient cachingprobability of the non-core routing node is greater than that of the random number A and A is greater than 0 and less than 1. The invention further discloses a collaborative caching system based on the content popularity and the node centrality. The method combines the distribution characteristics of the content and the nodes, improves the service performance of the content center network, and enhances the utilization rate of the network caching system.

Description

technical field [0001] The invention belongs to the technical field of content-centric networks, and more particularly relates to a collaborative caching method and system based on content popularity and node centrality. Background technique [0002] With the rapid development of network communication technology in recent years, the widespread use of cloud computing, big data and Internet of Things communication networks, the number of application devices connected to the Internet has increased significantly, and the demand for Internet security and efficiency has grown rapidly. Internet communication has gradually changed from end-to-end communication between hosts to content acquisition such as text information and multimedia audio and video to meet user needs, and communication methods based on user needs have gradually become the main body of network services. However, the current Internet communication mode is still dominated by end-to-end interaction. The traditional I...

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Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a collaborative caching method and system based on content popularity and node centrality. The method can make full use of cache system resources, classify and cache content objects with different popularity, increase the content diversity of the network cache system, and make up for the deficiency that the existing cache decision-making technology cannot comprehensively consider the content distribution

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