Cooperative Cache Placement for Arbitrary Topology in Content Centric Networking

As a network architecture suitable for content acquisition, Content Centric Networking (CCN) can effectively improve the efficiency of content distribution services and improve user service quality. The connection between nodes in the arbitrary topology does not follow specific rules, so it has great significance to find the optimal cache placement in arbitrary topology. In this paper, a cache placement algorithm in arbitrary topology in CCN is proposed. First, an optimization problem of cache placement for arbitrary topology is formulated, and the optimization objective is optimizing both user hop count and node load balance degree. Then we use particle swarm optimization (PSO) algorithm to solve the problem of cache placement. Simulation results illustrated that our algorithm can reduce hop counts for content delivery and improve the load balancing level effectively.