PIT and Cache dynamics in CCN

In this simulation-based performance study, we focus on the interplay of Cache-PIT dynamics in CCN under congested and non-congested network settings with a varied set of topologies (both synthetic and real-world) and workloads. We show that the PIT aggregation effect increases commensurately with both network load and the Betweenness Centrality attribute of the topology. While both PIT aggregation and in-network caching contribute significantly to achieving savings in network bandwidth consumption, they do not do so in an additive fashion. As network load increases, gains from cache hits diminish and are replaced by gains from PIT aggregation without dramatically impacting the overall level of savings achieved.