| 摘要: |
| 信息中心网络（CCN）是一种全新的网络架构，其显著的特点是处处缓存，合理的内容缓存部署能够显著提高网络传输效率。缓存替换策略是缓存管理中的重要组成部分，合理地进行缓存内容的替换，成为影响网络整体性能的关键。考虑到内容自身的特性，设计了一种基于节点缓存命中贡献率的贪婪双倍命中（GDH）缓存替换方案。该方案综合考虑了内容的请求次数、传输代价、缓存代价，设计全新的多目标价值函数，用于评估内容的缓存价值，当缓存空间不足时，替换掉价值最小的内容，实现节点缓存内容价值的最大化。仿真结果表明，该替换算法提高了节点的命中率，降低了获取内容的平均跳数。 |
| 关键词: 信息中心网络 缓存替换 网络传输效率 命中率 平均跳数 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(61301124) |
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| A cache replacement scheme based on contribution to hit ratio of node in content-centric networking |
| XU Changbiao,WANG Hua,WANG Heng |
| () |
| Abstract: |
| Content-centric networking(CCN) is a new network architecture. Its salient feature is caching everywhere.Deploying content caching reasonably can significantly improve the efficiency of network transmission. Caching replacement is an important part of caching management. A reasonable caching replacement scheme becomes an important factor of improving the quality of network. Considering the characteristics of content,this paper designs a new caching replacement scheme named GDH（Greedy-Dual-Hit） based on caching hit ratio of node. The number of requests,transmission cost and caching cost are taken into account to construct a new multiple-value function. The function can be used to evaluate the caching value of content. Cached content with the minimal value of multiple-value function is replaced for maximizing caching profit when the caching space is full. The simulation results show that the node hit rate is increased and the average hops of obtaining content is cut down. |
| Key words: content-centric networking(CCN) caching replacement transmission efficiency of network hit ratio average hop |
