Cache pressure-aware caching scheme for content-centric networking

Abstract

Content centric networking (CCN) is a new networking paradigm to meet the growing demand for contentaccess in the future. Because of its important role in accelerating content retrieval and reducing network transmissionload, in-network caching has become one of the core technologies in CCN and has attracted wide attention. The existingcaching schemes often lack sufficient consideration of node cache status and the temporal validity of user requests, andthus the cache efficiency of the network is greatly reduced. In this paper, a cache pressure-aware caching scheme isproposed, which comprehensively takes into account various factors such as content popularity, cache occupancy rate,cache replacement rate, and the validity period of the Interest packet to achieve reasonable cache placement andreplacement. Simulation results show that the proposed scheme effectively improves the cache hit rate and the resourceutilization while decreasing the average response hops.