A caching strategy based on content popularity and router level for NDN

Named Data Networking (NDN) is one of the future Internet architectures and has recently attracted a great deal of attention. NDN adopts named routing and caches all content on routers en-route. It helps to accelerate content distribution and reduces content retrieval latency. However, it also brings a large number of redundant data in the network. In this paper, we propose an in-network caching strategy based on content popularity and router level (CPRL) which caches the content according to its popularity level on the corresponding router to reduce redundant data. The simulation results show that the CPRL protocol can effectively reduce the amount of redundant data in the network and reduce average delay of request, as well as increase the diversity of data while acquiring the similar cache hit ratio compared to the Leave Copies Everywhere (LCE) caching strategy.