Approximate models for CCN data transfer in general topology

Recently, Content-Centric Networking (CCN) has been paid more and more attention. The modeling of CCN as an important research point is the foundation of the architecture. The past work of cache network modeling always assumes the virtual round trip time (VRTT) is zero for simplicity. However, this assumption isn´t practical and results in model error especially in CCN. CCN´s router can aggregate the content requests during the VRTT to avoid content delivery repeatedly. Thus, to modeling CCN data transfer, as well as understanding how it should be managed, the VRTT shouldn´t be ignored. In this paper, we model the data transfer in CCN, and propose a multi-cache with aggregation approximation (MCAA) algorithm to get the content miss rate and VRTT at each router. Simulation results show the validity of our MCAA algorithm.