内容中心网络中缓存策略研究

摘要

互联网需求由主机到主机通信转向海量内容获取为主。为满足新的互联网需求，内容中心网络(CCN)成为下一代互联网架构的研究热点。CCN中最重要的特征之一是利用网内缓存提高接收者获取内容的传输效率和网络资源的利用率。本文阐述了CCN的基本思想，从CCN内容缓存替换策略和缓存决策策略两个角度，阐述现有的研究如何实现CCN中内容缓存；对现有缓存策略进行了总结、分析和评价；给出了CCN缓存策略研究中仍存在的问题和未来的研究方向。%Internet requirements have dramatically transformed from data communications between two hosts to accessing a large amount of content. Given this fact, CCN becomes the hot spot to meet the new internet requirements in the next generation of Internet architecture. One common and important feature of CCN is to leverage in network caches to improve the transmission efficiency of receivers obtain content and network resource utilization. Firstly, this paper presents the basic idea of CCN, from two views of content cache replacement strategy and content caching decision strategies in CCN, how to realize the content caching of CCN in the existing research are presented. Secondly, this paper analyzes and evaluates the existing caching strategies. Finally, several key issues in CCN are discussed and future directions are pointed out.