计算机工程与科学2019，Vol.41Issue(2)：275-280,6.DOI:10.3969/j.issn.1007-130X.2019.02.012
基于动态内容流行度的NDN缓存决策和替换策略研究
A caching decision and replacement strategy based on dynamic content popularity for NDN
摘要
Abstract
In the named data networking (NDN), routers have the capacity of in-network cache, which greatly improve the efficiency of data distribution and retrieval in the network. However, because of the limited cache capacity in routers, how to design an effective caching strategy is still a grave challenge. To solve the problem, we present a caching decision and replacement strategy based on dynamic content popularity (DPDR). It fully considers content popularity and caching capacity and utilizes an additive increase multiplicative decrease (AIMD) algorithm to dynamically adjust the popularity threshold to store the arriving data whose popularity exceeds the popularity threshold in the cache space. In addition, we also propose a caching replacement algorithm, which takes the historical information of content popularity and the last request time into account to remove the contents with lowest replacement value from the cache store (CS). Simulation results show that compared with other schemes, the DPDR strategy can effectively improve cache hit rate, reduce average cache hit distance and decrease network throughput.关键词
命名数据网络/缓存权限策略/缓存替换策略/内容流行度/AIMDKey words
named data networking (NDN)/caching access policy/caching replacement policy/content popularity/AIMD分类
信息技术与安全科学引用本文复制引用
于美菊,李茹..基于动态内容流行度的NDN缓存决策和替换策略研究[J].计算机工程与科学,2019,41(2):275-280,6.基金项目
内蒙古自治区应用技术研究与开发项目(201702019) （201702019）
内蒙古自治区教育厅高校科研项目(NJZY18010) （NJZY18010）
