On the Effect of Scale-Free Structure of Network Topology on Performance of Content-Centric Networking

In this paper, we investigate the effect of scale-free structure of a network topology on performance of CCN (Content-Centric Networking). Specifically, we generate multiple scale-free and non-scale-free network topologies by two synthetic network generation models (i.e., scale-free tree and generalized BA model). We compare the average delivery delay and throughput of CCN with scale-free and non-scale-free network topologies. Our findings include that (1) the average content delivery delays in scale-free networks are much smaller than that of non-scale-free networks (2) however, the difference in average content delivery delay is not as large as the difference in their average path lengths, and (3) the average throughput in scale-free networks is higher than that of non-scale-free networks regardless of the network generation model and the distribution of content popularity.