A CCN Cache Method Based on Content Popularity and Node Importance

A popularity and content technology, applied in the Internet field, can solve the problems of short cache time, inaccessibility, and redundancy of popular content, and achieve the effect of reducing redundancy and improving cache performance

Active Publication Date: 2020-12-08
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

The traditional mainstream caching strategies Always (caching everywhere) and LCD (Leave Copy Down) will largely cause waste of node space and redundancy of cache content
The improved Betw (Betweenness) scheme only considers the betweenness of nodes, which is likely to cause two main problems: one is that the most popular content is only cached in nodes with high betweenness and cannot reach the location closest to the user; A large number of node caches are replaced frequently, and the cache time of popular content is short

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  • A CCN Cache Method Based on Content Popularity and Node Importance
  • A CCN Cache Method Based on Content Popularity and Node Importance
  • A CCN Cache Method Based on Content Popularity and Node Importance

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Based on the various problems in the above schemes, this scheme proposes to consider the centrality of nodes on the basis of content popularity ranking, and convert popularity into request frequency, for example, measure the popularity of content a into request frequency q( a), ranking the named content items in the system based on the global popularity. The centrality of a node reflects the importance of the node in the network, and the centrality is equal to the degree of a router node, that is, the number of links associated with the router. When the requested content is returned along the original path, the caching mechanism caches the content on the node with the largest node centrality. After the cache is full, a content popularity rank...

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Abstract

The invention discloses a CCN caching method based on content popularity and node importance, which considers the centrality of nodes on the basis of content popularity ranking, and caches the content at the node with the largest node when requesting content to return along the original path On the centrality node, after the cache is full, a content popularity ranking table is generated in the node, and then the popularity of the newly arrived content is compared with the maximum and minimum popularity in the node, and then it is decided whether to cache the newly arrived content in the node content. Simulation results show that this scheme improves the cache hit rate of routing nodes and reduces the average number of hops to obtain content.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a CCN caching method based on content popularity and node importance. Background technique [0002] The explosive growth of Internet traffic has brought huge challenges to the computing, storage and transmission capabilities of the network. According to the company's forecast, traffic has increased by more than 100% in the past five years, and will continue to increase by nearly three times in the next five years. Among them, content-related network video traffic growth is particularly rapid. The development of the Internet has far exceeded the original idea. Users' attention and demand for content itself have made the limitations of the current end-to-end communication network centered on the host address more and more obvious. [0003] In order to fundamentally solve the limitations of the network in transmission control, resource allocation, and address space scalabilit...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08
CPCH04L67/568H04L67/5682
Inventor 潘沛生郑凯月
Owner NANJING UNIV OF POSTS & TELECOMM
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