A cache probability replacement policy based on content popularity in Content Centric Networks

作者：Zhu Yi; Mi Zheng Kun; Wang Wen Nai^*

来源：Journal of Electronics and Information Technology, 2013, 35(6): 1305-1310.

DOI：10.3724/SP.J.1146.2012.01143

• Cache replacement policy
• Closed-form expression
• Content dissemination
• Content popularities
• Content-centric networks
• Least-recently-used policies
• Network applications
• Replacement policy

As the next Internet research hotspot, Content Centric Networks (CCN) provide content dissemination through distributed content cache machines and change the traditional host-centric network architecture. Cache replacement policy is one of the core issues in CCN which will directly restrict the data dissemination performance of the network. Considering the content popularity distribution characteristic, this paper proposes a cache probability replacement policy based on content popularity and derives the closed-form expressions which calculate the average request miss probability of different levels in a L-level tandem network scenario. This policy is designed to select a data chunk replacement position in cache according to its popularity and try to balance the proportion of different popularity contents stored in the network nodes. Numerical results show that this policy is suitable for the network application with higher requests' aggregation. In this scenario, it can obviously promote the dissemination performance of low contents compared with the traditional Least Recently Used (LRU) policy.

• 出版日期2013
• 单位南京邮电大学