Content classification based category popularity cache replacement method in oriented content-centric networking

A content-centric network and cache replacement technology, which is applied to electrical components, transmission systems, etc., can solve the problems of not fully considering the dynamics and inadaptability of CCN

Active Publication Date: 2014-12-31
HARBIN ENG UNIV
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Problems solved by technology

The LRU cache replacement strategy mentioned in the document "Modeling data transfer in content-centric networking" has the characteristics of simple algorithm, easy

Method used

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  • Content classification based category popularity cache replacement method in oriented content-centric networking
  • Content classification based category popularity cache replacement method in oriented content-centric networking
  • Content classification based category popularity cache replacement method in oriented content-centric networking

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Embodiment Construction

[0028] The present invention will be described in more detail below with reference to the accompanying drawings.

[0029] 1. A category popularity cache replacement method based on content classification in a content-centric network, characterized in that:

[0030] Step 1: When new data content arrives, first judge whether the remaining cache space of the node can accommodate the new content; if there is enough cache space to cache new data, go directly to step 4; if there is not enough cache space to cache data , go to step 2 to perform cache replacement to cache new data.

[0031] Step 2: Calculate the popularity of all content categories in the node according to the exponential weighted moving average (EWMA) calculation standard, and select the content category with the smallest popularity;

[0032] Step 3: Remove the content item with the least number of requests within a predefined time from the content category with the least popularity from the node cache;

[0033] St...

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Abstract

The invention relates to a content classification based category popularity cache replacement method in an oriented content-centric networking. The content classification based category popularity cache replacement method comprises the following steps: firstly determining whether a remaining cache space of a node can accommodate new data content or not; caching the new data content if the cache space is enough; calculating the popularity of all content categories in standard computing nodes according to an exponentially weighted moving average method, and selecting the content category with the smallest popularity; removing a content item with the fewest request times in predefined time in the content category with the smallest popularity out of a node cache; extracting name character string characteristics of the new data content and classifying; storing the newly arrived data content item into corresponding content category in the node, and updating a category heat table and a log. The cache of nodes in CCN (content-centric networking) can be better managed according to the content name category, so that the content can be found and replaced from the name of the content in the communication process in the networking, the diversity of the content in the node cache is balanced, and the efficiency of cache replacement is improved.

Description

technical field [0001] The invention relates to a category popularity buffer replacement method based on content classification in a content-oriented network. Background technique [0002] With the continuous development of the Internet, people's demand for content in the network is increasing. The current TCP / IP-based network architecture has increasingly prominent problems in network control and resource allocation. The focus of the Internet has shifted from the communication between hosts to how to quickly obtain the requested content from the Internet. For this reason, scholars at home and abroad have begun to study the new next-generation network architecture, and have carried out research on a number of related projects, which has promoted the development of the next-generation network, which has cross-age significance. The present invention mainly studies a new type of future network architecture "content-centric network". CCN abandons the communication method cente...

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Application Information

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IPC IPC(8): H04L29/08
Inventor 张国印邢志静武俊鹏夏松竹李庆显唐滨徐林枫
Owner HARBIN ENG UNIV
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