A smart routing scheme for named data networks

In this paper, we design an efficient and feasible scheme of caching and routing for NDN, i.e., Selective cAching and Dynamic rOuting (SADO). First, we propose a selective caching method that balances caching load among routers and reduces the caching redundancy dramatically. Then, we provide a scalable method to maintain routing information for the in-router cached contents. After that, a probabilistic forwarding method for requests is proposed to minimize the expected cost of fetching contents. Finally, we evaluate the performance of SADO by comprehensive simulations. The simulation results show that SADO achieves a decrease of 34% in the cost of fetching a content and a decrease of 81% in the load carried by the source servers, and a cached content is utilized 0.8 times on average.