内容中心网络中一种降低自治域内内容传输代价的缓存策略  

A CACHING STRATEGY FOR REDUCING CONTENT DELIVERY COST OF AUTONOMOUS SYSTEM IN CONTENT CENTRIC NETWORK

作　　者：杨晓非[1] 丁志鹏[1] 张宏宇[1] 牛翠翠[1] 黄胜[1] 

机构地区：[1]重庆邮电大学光纤通信技术重点实验室,重庆400065

出　　处：《计算机应用与软件》2016年第4期122-124,137,共4页Computer Applications and Software

基　　金：国家自然科学基金项目(61371096);重庆市自然科学基金项目(cstc2013jcyA40052);重庆市教委科学技术研究项目(KJ130515)

摘　　要：内容中心网络(CCN)是未来互联网中一种有前景的网络架构。它通过网内缓存机制加强内容的传输减少网络传输代价或提高网络吞吐量。针对同一个自治域内的内容分布情况以及热门内容对网络的影响,提出一种以降低内容传输代价为目标的缓存机制——DCR策略。该策略能够将热门内容推向用户同时降低内容的冗余度。实验结果表明:该缓存策略能有效地降低自治域内内容的传输代价,提高了域内缓存命中率。Content centric network（ CCN） is a promising network architecture of future internet. It enhances the content delivery,reduces content delivery cost and improves network throughput by utilising intra-network caching mechanism. In light of the content distribution situation within same autonomous system and the influence of hot contents on networks,we proposed a caching mechanism aimed at reducing content delivery cost,i. e.,delivery cost reduction（ DCR） strategy. DCR strategy can push hot contents to users while reducing contents redundancy. Experimental results showed that the caching strategy proposed could effectively reduce content delivery cost within AS and improved the intra-AS hit ratio as well.

关 键 词：内容中心网络 缓存机制 冗余度 内容传输代价 缓存命中率 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]