计算机科学 ›› 2018, Vol. 45 ›› Issue (7): 116-121.doi: 10.11896／j.issn.1002-137X.2018.07.019
罗建桢,蔡君,刘燕,赵慧民
LUO Jian-zhen,CAI Jun ,LIU Yan,ZHAO Hui-min
摘要： 现有以信息为中心的网络(Information-Centric Network,ICN)缓存的内容的时空分布不够合理,存在无效缓存及同质化缓存等问题。对此,文中提出一种基于内容流行度和社团重要度的ICN缓存与替换策略,其结合内容流行度与节点的社团重要度来选择缓存节点,把具有不同流行度的内容分散缓存在社团重要度不同的节点上,使缓存内容的空间分布趋于合理,从而增加了缓存内容的多样性。同时,基于社团局部流行度来替换缓存内容的策略更有利于优化缓存内容的时间分布,实现缓存内容空间分布的动态调整。实验结果表明,所提策略能有效地减少用户请求的平均响应时间,提高缓存对象的命中率和全网的缓存差异度。
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