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A caching method based on content popularity and node level matching

A popularity and node technology, applied in transmission systems, electrical components, etc., can solve problems such as not giving associated values, and achieve the effects of reducing invalid cache, low hit rate, and cache redundancy

Active Publication Date: 2019-08-06
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Abstract
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  • Claims
  • Application Information

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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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  • A caching method based on content popularity and node level matching
  • A caching method based on content popularity and node level matching
  • A caching method based on content popularity and node level matching

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Embodiment Construction

[0050] The present invention will be further clarified 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 caching strategy based on the matching of content popularity and node level provided by the present invention is suitable for content-centric wireless networks, and realizes the matching between content popularity and node level. The three parameters of hop count, betweenness centrality and replacement rate are used to comprehensively evaluate the node cache performance. The gray-scale association method is used to evaluate and grade the nodes at the same time. Then, using the matching probability between the content popularity and the node level, the node makes a caching decision for the content. The method effectively utilizes the cache space in the content-centric network and reduces the cache redundancy.

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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Patent Type & Authority Patents(China)
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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