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《Computer Technology and Development》 2018-06
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A Caching Scheme Based on Content Popularity and Betweenness in Content Centric Network

ZHENG Kai-yue;PAN Pei-sheng;School of Telecommunications & Information Engineering,Nanjing University of Posts and Telecommunications;  
Content center network( CCN) emphasizes the content resource itself as the center.CCN network caches the content in the routing node in order to make the content close to the user,so the cache scheme research has become one of the key technologies of CCN network.The traditional mainstream cache strategy like Always( always cached),LCD( leave copy down) will be largely caused by the waste of node space and the redundancy of content.The improved scheme Betwonly takes into account the betweenness,which can lead to two main problems: one is that the most popular content is only cached in the node with the lager betweenness,which can not reach the nearest user position; the other is that the Betwhas the more frequent replacement,which will decrease the time of the content cache in node.For this,we propose a coporate caching scheme considering content popularity and betweenness to realize optimized cache cooperation.The simulation on the ndn SIMplatform shows that the proposed scheme improves the hit rate of the routing node and reduces the average hop count for getting the content.
【Fund】: 江苏省高校自然科学基础研究计划重大项目(08KJD510001)
【CateGory Index】: TP393.02
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