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Cache policy based on match of content popularity and node level

A popularity and node technology, applied in electrical components, transmission systems, etc., can solve the problem of not giving associated values, etc.

Active Publication Date: 2016-11-09
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the current research does explore the connection between node importance and content, it does not give a clear and specific correlation value.

Method used

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  • Cache policy based on match of content popularity and node level
  • Cache policy based on match of content popularity and node level
  • Cache policy based on match of content popularity and node level

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Embodiment Construction

[0050] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0051] image 3 It shows a flowchart of a caching method based on content popularity and node level matching provided by an embodiment of the present invention. As shown in the figure, the method includes the following steps:

[0052] Step S1. When the user sends an interest request, the node information and the level k of the current request content popularity are added to the load field of the interest packet, and the user node forwards the interest packet according to the FIB (routing and forwarding table setting route to forward the interest packet to the content source).

[0053] Step S2. When node j on the forwarding path receives the Interest packet, record the thr...

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Abstract

The invention provides a cache policy based on match of content popularity and a node level. The cache policy is applied to a content center wireless network and realizes the match of the content popularity and the node level. Firstly, the cache performance of each node on a forwarding path is evaluated, the cache performance of the node is comprehensively evaluated from three parameters, namely the hops of the node from a user, the betweenness centrality and the replacement rate, wherein a gray correlation method is selected to assess and classify the nodes at the same time. Then, based on the matching probability of the content popularity and the node level, the node makes a cache decision on the content. By adopting the method, the cache space in the content center network is effectively utilized, so that the cache redundancy is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a caching method based on content popularity and node level matching. Background technique [0002] Content Centric Networking (CCN) is a content-based communication architecture, which is characterized by the fact that users pay attention to the content itself rather than the location of the content, so it is more suitable for the distribution and acquisition of content dominated by current Internet applications. In-network caching technology plays an important role in CCN. At present, the in-network caching of CCN is mainly to solve the problems of improving cache effectiveness and reducing cache redundancy. The existing caching methods mainly lie in the following aspects: probabilistic caching model; by evaluating the characteristics of nodes (such as location, importance, caching capacity, etc.), select some nodes to cache content; consider the characteristics ...

Claims

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Application Information

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IPC IPC(8): H04L29/08
CPCH04L67/5682
Inventor 张天魁李尧肖霖
Owner BEIJING UNIV OF POSTS & TELECOMM
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